JP2016215364A - Shutter apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel shutter capable of opening/closing an opening formed in a machine apparatus without greatly changing the design of the existing machine apparatus.SOLUTION: This shutter apparatus is provided with: a connection member 11 formed by connecting together fixing plates 12 so as to move the fixing pates 12 close to or away from each other, extensible and having a mountain part 11a and a valley part 11b; and shutter members 14 fixed to the lower end sides of the fixing plates 12, and configured such that the overlapping area of closing plate parts formed in the shuter members 14 is reduced when the fixing plates 12 are expanded to separate from each other by means of the application of an external force, and the overlapping area of the closing plate parts formed in the shuter members 14 is increased to open an opening formed in a machine apparatus when the fixing plates 12 are reduced to move close to each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a mounted shutter device used for opening and closing an opening formed in a machine device such as a laser beam machine, a machining center, or a machine tool such as a lathe or a milling machine.

  Various openings may be formed in a mechanical device such as a laser processing machine, a machining center, or a machine tool such as a lathe or a milling machine. Such an opening is formed for the purpose of carrying a workpiece into the mechanical device or performing maintenance inside the mechanical device. However, a drive system for driving a head or a tool for laser processing or machining a workpiece in the XY direction or the Z direction is disposed inside the mechanical device, and spatter, chips, or dust are passed through the opening. And the like enter the inside of the mechanical device and adhere to the drive system, accurate positioning becomes impossible. Further, in the laser processing machine, the dust or the like enters the processing machine and adheres to the mirror, thereby causing problems such as irregular reflection of the laser beam. In particular, in a fiber laser processing machine that has been put into practical use in recent years, when a fiber laser is scattered outside through the opening, it often causes fatal injury to an operator, so this situation is prevented. For this reason, the strict design is applied.

  Therefore, when such an opening is formed in the mechanical device, a shutter device that opens and closes the opening is disposed. By opening the shutter device, a workpiece can be carried into the mechanical device or maintenance work can be performed. Have gone. For example, Japanese Patent Application Laid-Open No. 2007-819260 (Patent Document 1) discloses a door in which an opening through which a workpiece is taken in and out of a mechanical device is formed in the ceiling of the mechanical device, and the opening is automatically opened and closed. Is provided. That is, in this prior art, a pair of left and right doors that are swingable via support shafts are arranged in the opening formed in the ceiling, and the pair of left and right doors are turned sideways by expansion and contraction of the cylinder rod of the cylinder. The opening is closed, and the opening is opened when the pair of left and right doors face downward.

JP 2007-260819 A

  However, in the prior art disclosed in Patent Document 1, when the pair of left and right doors are closed to open, a trajectory that rotates about 90 degrees about the support shaft is passed. The space must be secured within the range of the movement trajectory of the pair of left and right doors, and cannot be applied to a mechanical device that cannot secure such a space, or the pair of doors having the above-described configuration is disposed. In doing so, the design of the machine itself must be changed.

  Therefore, the present invention has been proposed in order to solve the problems of the above-described conventional technology, and the openings formed in the mechanical device can be formed without significantly changing the design of the conventional mechanical device. An object of the present invention is to provide a novel shutter device that can be opened and closed.

  The present invention has been proposed in order to solve the above-mentioned problems, and the first invention (the invention according to claim 1) is a machine device such as a laser processing machine, a machining center, a lathe, or a machine tool such as a milling machine. A shutter device that opens and closes a rectangular opening formed in each of the above-described rectangular openings, each having a length in the length direction of the rectangular opening and facing each other and arranged in the width direction of the opening. A connecting member formed by connecting a plurality of fixing plates and the fixing plates facing each other so that the fixing plates can approach and separate from each other and have a crest and a trough. And a shutter side fixing plate portion fixed to the lower end side of each of the fixing plates, a closing plate portion bent from one side of the shutter side fixing plate portion and closing the opening from the distal end to the proximal end side, Have A shutter member that is partially overlapped between adjacent blocking plate portions, and when the respective fixing plates are extended so as to be separated by the action of an external force, the shutter member In the case where the overlapping area of the closing plate portions formed on each of the first and second closing plates is reduced, the opening is closed, and the respective fixing plates are reduced so as to approach each other, each of the shutter members is formed. The overlapping area of the blocking plate portions is increased, and the opening is opened.

  In the shutter device according to the first aspect of the present invention, when the respective fixing plates are extended so as to be separated by the action of an external force, the shutter constituting the shutter member fixed to the lower end side of each fixing plate. When the area where the plate portions overlap is reduced to close the opening, and the respective fixing plates are reduced so as to approach each other, the area where the closing plate portions formed on each of the shutter members overlap. Is increased and the openings are opened, so that even when high-temperature sputtering or laser light is scattered or irradiated on the shutter device, the individual devices are It is possible to prevent the shutter member from being discharged to the outside or being damaged. Further, in the shutter device according to the present invention, since the opening is not opened and closed by the rotational movement of the door as in the conventional shutter device, the opening is opened and closed by the linear movement of the shutter member. It is possible to attach the mechanical device to the mechanical device without drastically changing the design.

  As described above, the connecting member constituting the first invention is formed by connecting the fixing plates so that the fixing plates facing each other can be approached and separated from each other. For example, a bellows member formed of a flexible material such as a sheet (see claim 2) and the fixing plates facing each other are separated from each other. The fixing plate may be biased in a direction (direction in which the opening is closed) (see claim 3). Further, the material of the fixing plate and shutter member constituting the first invention may be metal or resin, but the thickness of the fixing plate is long when the bellows body is most reduced. In order to make the thickness as short as possible, it is desirable to have a certain rigidity and to be as thin as possible. In particular, when the mechanical device to which the present invention is applied is a laser processing machine, the shutter member is desirably made of metal in order to prevent melting or burning due to laser light irradiation such as irregular reflection. . Further, the expansion and contraction operation of the shutter device may be performed manually by an operator, or may be mechanically operated by various driving devices such as a cylinder, a motor, and a linear motion device.

  Further, according to a second invention (invention according to claim 2), in the first invention, the connection member is formed of a flexible material such as a sheet or a film, and a peak portion and a valley portion are formed. The bellows which is alternately formed and can be expanded and contracted by the action of the external force in a direction perpendicular to the length direction of the peak and valley, and has an area which closes the entire opening when extended most. It is a member.

  In the shutter device according to the second aspect of the present invention, each fixing plate is connected by a bellows member in which peaks and valleys are alternately formed. It has a closed area. That is, the shutter device according to the second invention closes the opening formed in the mechanical device not only by the closing plate portion constituting the shutter member but also by the bellows member. It is possible to prevent the possibility of dust entering into the machine or the dust being discharged / discharged from the mechanical device to the outside.

  According to a third invention (invention according to claim 3), in the first invention, the connection member connects the fixing plates facing each other, and a trough and the right and left of the trough And when the external force is not acting, the fixing plate and the fixing plate are biased in a direction away from each other. is there.

  Since the connecting members constituting the third invention connect the fixing plates facing each other, the connecting members are all disposed between the fixing plates. Then, when no external force is applied, the connecting member is biased in a direction in which the fixing plate and the fixing plate are separated from each other (a direction in which the opening is closed) (having a biasing force). Therefore, when an external force acts in a direction to close the opening formed in the mechanical device, it is elastically deformed against the urging force. Therefore, according to the shutter device of the third aspect of the invention, when opening the opening formed in the mechanical device, a predetermined force against the urging force is required, but on the contrary, the opening is closed. In this case, the biasing force (elastic force) can be used with a very small force (or without external force).

  According to a fourth invention (invention 4), in any one of the first to third inventions, the shutter-side fixing plate portion constituting the shutter member is provided on the fixing plate or the fixing plate. It is characterized in that it is detachably attached to a fixed shutter member attaching plate.

  According to the fourth aspect of the present invention, each shutter member is directly attached to the respective fixed plate, and each shutter member is interposed via the shutter member attachment plate fixed to the respective fixed plate. And when attached to the shutter member mounting plate. The portion where the shutter member is attached to the fixing plate or the shutter member mounting plate is the shutter side fixing plate portion, and the shutter side fixing plate portion is detachably attached to the fixing plate or the shutter member mounting plate. ing. Therefore, according to the shutter device according to the fourth aspect of the present invention, the entire shutter device is replaced even when a part of each of the shutter members is damaged or deformed due to long-term use. There is no need, and only the damaged shutter member can be replaced.

  According to a fifth invention (invention according to claim 5), in the fourth invention, the shutter member mounting plate includes a fixed plate portion fixed to the fixed plate, and one side of the fixed plate portion. A bent mounting plate portion, and the mounting plate portion and the shutter-side fixing plate portion each have a plurality of engaging holes in which engaging members are arranged, and a cover to which the engaging member engages. The engagement hole is relatively provided.

  The fifth invention is based on the premise of the shutter device attached to the shutter member mounting plate with the shutter member mounting plate fixed to each fixing plate interposed therebetween, and is fixed to the fixing plate. The mounting plate portion of the shutter member mounting plate fixed via the plate is provided with an engaging hole in which the engaging member is disposed, while the engaging member is engaged with the shutter side fixing plate portion. The engaging plate is provided with an engaging hole in which the engaging member is disposed, while the engaging plate is provided with the engaging member. This includes both cases where engaged holes to be engaged are provided. Then, by engaging the engaging member with the engaged hole, the shutter member can be attached to the shutter member mounting plate, and the engagement state between the engaging member and the engaged hole is released. Thus, the shutter member can be detached from the shutter member mounting plate.

  According to a sixth aspect of the present invention, in the fourth aspect of the present invention, the fixing plate and the shutter-side fixing plate portion include a plurality of engaging holes in which engaging members are respectively disposed, and the engaging member. The mating holes to be engaged with each other are provided relatively.

  The sixth invention is based on the premise of a shutter device in which each shutter member is directly attached to each of the fixing plates, and a plurality of engaging holes in which engaging members are respectively arranged on the fixing plates. On the other hand, the engagement member is disposed in the shutter side fixing plate portion, and the case where the engagement side hole to be engaged with the engagement member is provided in the shutter side fixing plate portion. In addition to the case where the engagement hole is provided, the fixed plate includes both the case where the engagement hole to be engaged with the engagement member is provided. Then, by engaging the engaging member with the engaged hole, the shutter member can be attached to the fixing plate, and by releasing the engaged state between the engaging member and the engaged hole. The shutter member can be removed from the fixed plate.

  Further, according to a seventh invention (invention according to claim 7), in any one of the fifth and sixth inventions, the engagement member is configured to have one and the other disk portions opposed to each other, and one end thereof. A shaft portion fixed to the center of the one disc portion and the other end fixed to the center of the other disc portion, and the engaged hole is formed in the shutter side fixing plate portion. And a disk part insertion hole through which the one or the other disk part is inserted, and a shaft part insertion hole through which the shaft part is inserted and communicated with the disk part insertion hole. The disc part insertion hole is partially closed, and the tip side is bent and elastically deformed in the direction away from the fixed plate or shutter member mounting plate by the action of external force, and the engaging member is One or the other disc part is inserted into the disc part insertion hole. After that, the shaft part constituting the engaging member is moved while being guided by the shaft part insertion hole, so that the tip is elastically deformed between the one disk part and the other disk part, and the original part is restored. It is characterized in that a stopper tongue that can be returned to the state is faced.

  In the shutter device according to the seventh aspect of the invention, the engaged hole with which the engaging member is engaged is formed in the shutter side fixing plate portion (shutter member). In other words, in the shutter device according to the seventh aspect of the invention, the engaging member is attached to the fixed plate or the shutter member attaching plate. And since the said to-be-engaged hole has a disk part insertion hole, this disk part insertion hole, and a shaft part insertion hole, one disk which comprises the said engaging member in the said disk part insertion hole The shaft portion constituting the engaging member can be inserted into the shaft portion insertion hole by sliding the shutter member. Furthermore, a stopper tongue piece is provided in the disk part insertion hole. This stopper tongue piece closes a part of the disk part insertion hole, and the tip faces between the one disk part and the other disk part. When the shutter member is attached to the fixing plate or the shutter member mounting plate, the tip side of the stopper tongue is separated from the fixing plate or the shutter member mounting plate by the tip of a tool such as a screwdriver. It is bent and elastically deformed (released from the disk part insertion hole), and one or the other disk part constituting the engaging member is inserted into the disk part insertion hole. Then, when the shutter member is slid so that the shaft portion constituting the engagement member is guided by the shaft portion insertion hole, the stopper tongue piece that has been elastically deformed until then returns to the original state again, The disc side insertion hole on the shutter side is closed. In addition, at this time, the tip of the tongue piece for stopper is in a state between one disk portion and the other disk portion, that is, toward the shaft portion. Note that when removing the shutter member attached to the fixed plate or the shutter member attaching plate, the procedure may be reversed.

  Therefore, according to the seventh aspect of the invention, once the shutter member is mounted on the fixed plate or the shutter member mounting plate, the disc member insertion hole on the shutter member side is closed by the stopper tongue. The shutter member does not fall off from the fixed plate or the shutter member mounting plate, and it is possible to suppress abnormal noise due to rattling of the shutter member during opening / closing operation of the shutter device or driving of the mechanical device. Is done.

  Further, an eighth invention (invention according to claim 8) is the invention according to any one of the second, fifth and seventh inventions, wherein when the bellows member is extended on each of the fixing plates. Further, a separation preventing member for preventing the front end side of the closing plate portion constituting the shutter member from being separated from the back surface of the closing plate portion constituting another shutter member is fixed. is there.

  In the eighth invention, a separation preventing member is fixed to the fixing plate, and when the bellows member is extended by the separation preventing member, the front end side of the closing plate portion constituting the shutter member is adjacent. It is prevented that the shutter member is separated from the back surface of the closing plate portion constituting the shutter member. Therefore, according to the eighth aspect of the invention, high-temperature spatter melted from the gap between the blocking plate portions adjacent to each other or the laser beam that has been irregularly reflected penetrates the bellows member and burns it. Can be prevented.

  According to a ninth invention (invention according to claim 9), in the eighth invention, the separation preventing member includes an upper fixing plate portion fixed to one side of the upper end side of the fixing plate, and the upper fixing member. The lower surface when the bellows member is bent in a substantially horizontal direction from the upper end of the plate portion is opposed to the upper surface of the bellows member, and the distal end or the middle portion on the distal end side is another adjacent separation preventing member. And an anti-separation plate portion that abuts on the upper surface by its own weight.

  In the ninth invention, the separation preventing member is bent in a substantially horizontal direction from the upper fixing plate portion fixed to one side surface of the upper end side of the fixing plate, and from the upper end of the upper fixing plate portion, and the bellows member The lower surface of the accordion member is opposed to the upper surface of the bellows member, and the distal end or the front end-side intermediate portion is brought into contact with the upper surface of another adjacent separation preventing member by its own weight. Since the shutter member is fixed to the fixed plate via the shutter member mounting plate when a force is applied to rotate the tip of each shutter member downward by its own weight, the fixed plate The force that rotates in the same direction acts. However, since the proximal end of the separation preventing member is fixed to the same fixing plate and the distal end or the middle portion on the distal end side abuts against the upper surface of another adjacent separation preventing member by its own weight, the rotation is suppressed. The Therefore, even in the case of the shutter device according to the ninth invention, as in the eighth invention, high-temperature spatter melted from the gap between the shutter member and the shutter member is It is possible to prevent the laser beam entering from the inside or the irregularly reflected laser light from entering from the gap and damaging or burning the bellows member.

  According to a tenth invention (invention of claim 10), in any one of the first to ninth inventions, one of the plurality of fixing plates faces the other and the other fixing plate. Between the fixed plate, one end is fixed to the one fixed plate, the other end is fixed to the other fixed plate, and when the one fixed plate and the other fixed plate are separated at a predetermined interval, An interval regulating member that regulates the separation beyond the interval is arranged.

  In the shutter device according to the tenth aspect of the present invention, since the distance regulating member is disposed, an area of overlapping of the closing plate portions formed on each of the shutter members is caused by the action of an external force that closes the opening. It is possible to effectively prevent the situation where the gap is lost (the gap between the closing plate portion and the closing plate portion is opened).

  According to the shutter device according to the first invention (the invention described in claim 1), even when high temperature sputtering or laser light is scattered or irradiated on the shutter device inside the mechanical device. It is possible to prevent the individual shutter members from being discharged to the outside or the shutter members from being damaged. Further, in the shutter device according to the present invention, since the opening is not opened and closed by the rotational movement of the door as in the conventional shutter device, the opening is opened and closed by the linear movement of the shutter member. It is possible to attach the mechanical device to the mechanical device without drastically changing the design.

  In the shutter device according to the second invention (invention of claim 2), not only the closing plate portion constituting the shutter member but also the opening formed in the mechanical device is closed by the bellows member. For this reason, according to the shutter device, it is possible to prevent the possibility that dust enters the mechanical device or the dust or the like is discharged and discharged from the mechanical device to the outside.

  Further, according to the shutter device according to the third invention (the invention described in claim 3), when opening the opening formed in the mechanical device, a predetermined force against the urging force is required. On the contrary, when the opening is closed, the biasing force (elastic force) can be used with a very small force (or without external force).

  Further, according to the shutter device of the fourth invention (invention of claim 4), even if a part of each of the shutter members is damaged or deformed due to long-term use, There is no need to replace the entire shutter device, and only the damaged shutter member can be replaced.

  According to the shutter device of the fifth invention (invention of claim 5) and the shutter device of the sixth invention (invention of claim 6), the engaging member is engaged with the engaged hole, respectively. By doing so, the shutter member can be attached to the shutter member attaching plate or the fixing plate, and by releasing the engagement state between the engaging member and the engaged hole, the shutter member is attached to the shutter member attaching plate or It can be removed from the fixed plate.

  Further, according to the shutter device of the seventh invention (the invention according to claim 7), once the shutter member is mounted on the fixing plate or the shutter member mounting plate, the stopper tongue piece moves the shutter member side. Since the disk portion insertion hole is closed, the shutter member does not fall off from the fixed plate or the shutter member mounting plate, and the shutter member does not move when the shutter device is opened or closed or when the mechanical device is driven. Generation of abnormal noise due to rattling or the like is suppressed.

  Further, according to the shutter device according to the eighth invention (the invention according to claim 8) and the shutter device according to the ninth invention (the invention according to claim 9), the closing plate portion and the closing plate portion that are adjacent to each other, It is possible to prevent high-temperature spatter melted from the gaps or irregularly reflected laser light from entering and damaging or burning the bellows member.

  Further, in the shutter device according to the tenth invention (invention according to claim 10), since the interval regulating member is arranged, the shutter member is formed on each of the shutter members by the action of an external force that closes the opening. In addition, it is possible to effectively prevent the area where the closing plate portions overlap each other (the opening between the closing plate portion and the closing plate portion) itself can be effectively prevented.

It is a perspective view which isolate | separates and shows a shutter apparatus from a mechanical apparatus. It is sectional drawing which shows the basic composition of a shutter apparatus. It is a perspective view which expands and shows the external appearance of the left side of a left shutter apparatus. It is a perspective view which expands and shows the external appearance of the right side of a left shutter apparatus, and the left side of a center shutter apparatus. It is a perspective view which expands and shows the external appearance of the right side of a center shutter apparatus, and the left side of a right shutter apparatus. It is a perspective view which expands and shows the external appearance of the right side of a right shutter apparatus. FIG. 4 is an enlarged perspective view showing the state of the left shutter device with the first connecting plate removed. It is an external view of a central shutter device, and is an enlarged perspective view showing a state in which a first connecting plate and a second connecting plate are removed. FIG. 5 is an enlarged perspective view showing the state of the right shutter device with the second connecting plate removed. It is a disassembled perspective view of a center shutter apparatus. It is a front view of a shutter device. It is a perspective view which shows the principal part of the attachment structure of an attachment plate and a shutter member. It is a top view which shows the shutter apparatus which concerns on 2nd Embodiment. It is a top view which expands and shows the structure of the left side of the shutter apparatus shown in FIG. It is a top view which expands and shows the structure of the right side of the shutter apparatus shown in FIG. It is sectional drawing which shows the state by which the shutter apparatus shown in FIG. 13 was extended most. It is sectional drawing which expands and shows the shutter apparatus shown in FIG. FIG. 14 is a front view of the shutter device shown in FIG. 13. The left connection member (right connection member) is shown, Comprising: (A) is the top view, (B) is the front view, (C) is the perspective view.

  Hereinafter, a shutter device according to the best mode for carrying out the present invention (the shutter device according to the first embodiment) will be described in detail with reference to the drawings.

  As shown in FIG. 1, the shutter device 1 according to the first embodiment is arranged to open and close a rectangular opening 2 a formed in a top plate 2 of a fiber laser processing machine. A left guide rail 3 having a length in the same direction as the width direction of the opening 2a is disposed on the top plate 2 on the left side of the opening 2a, and on the right side of the opening 2a, the opening 2a. A right guide rail 4 having a length in the same direction as the width direction is arranged. As will be described later, in the shutter device 1 according to this embodiment, the opening 2a is opened and closed while being guided by the left guide rail 3 and the right guide rail 4.

  The shutter device 1 includes a left shutter device 5 disposed on the leftmost side, a central shutter device 6 in which the left side is connected to the right side of the left shutter device 5, and a left side on the right side of the central shutter device 6. It consists of three shutter devices with the right shutter device 7 connected. Therefore, the basic configuration of the left shutter device 5, the central shutter device 6, and the right shutter device 7 (hereinafter referred to as individual shutter devices 10) will be described below.

  As shown in FIG. 2, each of the shutter devices 10 includes a bellows member 11, a plurality of fixing plates 12 fixed to the bellows member 11, and the bellows member 11 between the fixing plates 12. The shutter member mounting plate 13 is sandwiched and fixed, and the shutter member 14 is fixed to the shutter member mounting plate 13. The bellows member 11 is made of a sheet-like synthetic leather having flame retardancy, and peaks 11a and valleys 11b are alternately formed in the width direction. Therefore, the bellows member 11 can be expanded and contracted via the peak portion 11a and the valley portion 11b. As will be described later, the bellows member 11 has a larger area than the entire area of the opening 2a when the opening 2a is closed, and is a connecting member constituting the present invention. Further, each of the fixing plates 12 is formed into a plate shape with a synthetic resin, and the lower end side of the fixing plate 12 and the lower end side of the bottom surface and the rear surface of the fixing plate 12 are the bellows members. 11 is heat welded. The shutter member mounting plate 13 has an obtuse angle from the lower end side of the fixed plate 12 and a fixed plate portion 13a fixed with the fixed plate 12 and the bellows member 11 sandwiched therebetween, and the lower end of the fixed plate portion 13a. And a mounting plate portion 13b that is bent through the bent portion. And the base end side (shutter side fixed board part 14a) of each said shutter member 14 is attached to the said attachment plate part 13b via the engagement member 18 so that attachment or detachment is possible. The specific configuration of the engaging member 18 and the configurations of the mounting plate portion 13b and the shutter side fixing plate portion 14a will be described in detail later. The shutter member 14 attached to the attachment plate portion 13b is bent through the obtuse angled bent portion from the shutter side fixing plate portion 14a and one side of the shutter side fixing plate portion 14a. An intermediate plate portion 14b, a main plate portion 14c bent from one side of the intermediate plate portion 14b via an obtuse angled bent portion, and a front end side plate bent slightly upward from one side of the main plate portion 14c 14d. The intermediate plate portion 14b, the main plate portion 14c, and the distal end side plate portion 14d are portions that close the opening 2a as will be described later, and are blocking plate portions that constitute the present invention.

  Further, a separation preventing member 20 is fixed to the upper end side (left side or right side) of each of the fixing plates 12. The separation preventing member 20 includes an upper fixing plate portion 20a fixed to the upper end side of the fixing plate 12 by a caulking material 22 on the same side as the side on which the shutter member mounting plate 13 is fixed, and the upper fixing plate 20a. Most of the lower surface is formed of a separation preventing plate portion 20b that is bent substantially at a right angle from the upper end of the plate portion 20a (substantially horizontal) and faces the upper surface of the bellows member 11. The middle part on the front end side of the separation preventing plate part 20b is inclined downward through an obtuse angled bent part.

  In the individual shutter devices 10 according to the first embodiment, the shutter member mounting plate 13, the shutter member 14, and the separation preventing member 20 are made of metal such as steel or stainless steel as a material and a plate body, respectively. In addition, in the natural state, the distal end of the distal end side plate portion 14d constituting the shutter member and the distal end of the separation preventing plate portion 20b constituting the separation preventing member 20 are urged toward each other.

  Therefore, when a force is applied to a state in which each shutter device 10 is extended from a contracted state by an operator or a driving device (not shown), the bellows member 11 has the adjacent peak portions 11a and valley portions 11b. Are moved and extended in the directions in which they are separated from each other, and the shutter-side fixing plate portions 14a constituting the adjacent shutter members 14 are separated from each other, and the intermediate portions constituting the adjacent shutter members 14 are arranged. The overlapping range (degree) of the plate portion 14b, the main plate portion 14c, and the distal end side plate portion 14d is gradually reduced, and the distal end of the distal end side plate portion 14d constituting the specific shutter member 14 is adjacent to the specific shutter member 14. It is located on the lower surface of the intermediate plate portion 14b constituting the other shutter member 14. In addition, the separation preventing plate portions 20b constituting the separation preventing members 20 adjacent to each other have a large overlapping range (degree) in the contracted state, and gradually overlap as the shutter device 10 is extended. The range (degree) decreases, and finally (when it is most extended), as shown in FIG. 2, the tip of the specific separation preventing plate portion 20b is connected to the specific separation preventing plate portion 20b. It is located on the base end side of the other separation preventing plate portion 20b adjacent to. In this embodiment, as described above, in the natural state, the distal end of the distal end side plate portion 14d constituting the shutter member 14 and the distal end of the separation preventing plate portion 20b constituting the separation preventing member 20 are defined. Since they are biased in the directions approaching each other, as described above, when the shutter device 10 is most extended, the entire shutter member 14 is biased upward, and as a result, a specific shutter member is formed. The distal end of the distal end side plate portion 14 d constituting the contact 14 abuts on the lower surface of the intermediate plate portion 14 b constituting the other shutter member 14 adjacent to the specific shutter member 14. Further, when the shutter member 14 has its own weight, a force that rotates clockwise in FIG. 2 is applied, and a force that causes the fixing plate 12 to rotate in the same clockwise direction along with this action is applied. Even if it exists, the front-end | tip of the separation prevention plate part 20b which comprises the said separation prevention member 20 contact | abuts to the upper surface of the other adjacent separation prevention plate part 20b. Therefore, according to the shutter device 10 according to the present embodiment, the shutter member 14 and the shutter member 14 are in the most contracted state, the most extended state shown in FIG. There is no gap between them.

  Hereinafter, based on such a basic configuration of the shutter device 10, the left shutter device 5, the central shutter device 6, and the right shutter device 7 constituting the shutter device 1 described above will be described again.

  As shown in FIG. 1, each of the fixing plates 12 constituting the left shutter device 5, the central shutter device 6, and the right shutter device 7 has a notch for shortening the height (width) of the fixing plate 12 at the upper end thereof. As shown in FIG. 3 or FIG. 4 showing the left shutter device 5, a portion 12a is formed on the left and right sides of the fixing plate 12 constituting the left shutter device 5 from the portions where the notches 12a are formed. A left elongated portion 12b and a right elongated portion 12c each having a long height (width) are formed. Further, in the central shutter device 6, as shown in FIG. 4 or FIG. 5, the height (width) is longer on the left and right sides of the fixing plate 12 than on the portions where the notches 12a are formed. The left long portion 12b and the right long portion 12c are formed. Further, in the right shutter device 7, as shown in FIG. 5 or FIG. 6, the height (width) is longer on the left and right sides of the fixing plate 12 than the portions where the notches 12a are formed. The left long portion 12b and the right long portion 12c are formed.

  As shown in FIG. 1 or FIG. 4, the right side of the left shutter device 5 and the left side of the central shutter device 6 are right long formed on each of the fixed plates 12 constituting the left shutter device 5. The scale portion 12c and the left elongated portion 12b formed on each of the fixed plates 12 constituting the central shutter device 6 are detachably connected by a first connecting plate 24, respectively. As shown in FIG. 1 or FIG. 5, the right side of the central shutter device 6 and the left side of the right shutter device 7 are the right long formed on each of the fixed plates 12 constituting the central shutter device 6. The scale portion 12c and the left elongated portion 12b formed on each of the fixed plates 12 constituting the right shutter device 7 are detachably connected by the second connecting plate 25, respectively. The first connecting plate 24 and the second connecting plate 25 are respectively arranged on the front side and the back side of the respective fixing plate 12, and the first connecting plate 24, 24 or the second connecting plate 25. , 25 sandwich the fixing plate 12.

  The connection structure between the left shutter device 5 and the central shutter device 6 by the first connection plate 24 and the connection structure between the central shutter device 6 and the right shutter device 7 by the second connection plate 25 are shown. More specifically, as shown in FIG. 7, the right end of the right long portion 12c of the fixed plate 12 constituting the left shutter device 5 is recessed to the left of the right end of the right long portion 12c. On the other hand, as shown in FIG. 8 or FIG. 10, the left long plate portion 12b is formed at the left end of the left long plate portion 12b of the fixed plate 12 constituting the central shutter device 6, as shown in FIG. A protruding plate portion 12e is formed to protrude to the left side of the left end of the. The fixed plate 12 constituting the left shutter device 5 and the fixed plate 12 constituting the central shutter device 6 are connected to the left shutter device by the first connecting plates 24 and 24 on the front side and the back side. In the recess 12d formed in the fixed plate 12 constituting the central shutter device 6, the protruding plate portion 12e formed in the fixed plate 12 constituting the central shutter device 6 is connected in a fitted state. Also, as shown in FIG. 8 or FIG. 10, the right end of the right elongated portion 12c formed on the fixed plate 12 constituting the central shutter device 6 is recessed to the left of the right end of the right elongated portion 12c. On the other hand, as shown in FIG. 9, the left end of the left long plate portion 12b of the fixed plate 12 constituting the right shutter device 7 is provided at the left end of the left long plate portion 12b. A protruding plate portion 12e that protrudes further to the left is formed. The fixed plate 12 constituting the central shutter device 6 and the fixed plate 12 constituting the right shutter device 7 are connected to the central shutter device by the second connecting plates 25 and 25 on the front side and the back side. In the recess 12d formed in the fixed plate 12 constituting the right shutter device 7, the protruding plate portion 12e formed in the fixed plate 12 constituting the right shutter device 7 is connected in a fitted state.

  Further, the separation preventing member 20 formed in the left shutter device 5 constituting the individual shutter devices 10 described as the basic configuration is as shown in FIG. 1 or 3 in the left shutter device 5. The left shutter device 5 is fixed to the left elongated portion 12b of the fixing plate 12. That is, in the left shutter device 5, the individual upper fixing plate portions 20 a are fixed to the upper end side of the front of the left elongated portion 12 b that constitutes each of the fixing plates 12. As described above, the separation preventing member 20 is bent at a substantially right angle from the upper end of the upper fixing plate portion 20a fixed to the fixing plate 12 and the upper end of the upper fixing plate portion 20a (substantially horizontal). Most of the lower surface is composed of the separation preventing plate portion 20b facing the upper surface of the bellows member 11, and before being bent in this way, a flat plate body (not shown) is used. A U-shaped slit is formed on both the left and right sides of the middle part on one side of the plate body, and a clamping plate portion (not shown) is formed by bending a portion surrounded by the slit, and the upper fixing plate The upper end side of the fixing plate 12 is sandwiched between the portion 20a and the clamping plate portion, and is fixed to the fixing plate 12 by the caulking material 22 described above.

  Further, the separation preventing member 20 described above is a notch 12a constituting the central shutter device 6 in the central shutter device 6 as shown in FIG. 1, FIG. 4, FIG. 5, or FIG. Are fixed at two locations near the left elongated portion 12b and near the right elongated portion 12c. Note that the configuration and the fixing structure of the separation preventing member 20 fixed to these two locations are the same as those fixed to the left shutter device 5, and thus the description thereof is omitted. Further, in the right shutter device 7, the separation preventing member 20 described above is fixed to the right elongated portion 12c of the fixing plate 12 constituting the right shutter device 7, as shown in FIG. 1 or FIG. Has been.

  Also, a notch (not shown) having a rectangular shape with the lower part opened is formed at the lower end of the left long plate part 12b formed on the fixed plate 12 constituting the left shutter device 5, respectively. As shown, a left slider 27 having a notch 27a having the same shape as the notch is fixed to the front of the left elongated plate portion 12b. In addition, a rectangular notch (not shown) whose lower part is opened is formed at the lower end of the right long portion 12c formed on the fixed plate 12 constituting the right shutter device 7, respectively, as shown in FIGS. Alternatively, as shown in FIG. 11, a right slider 28 having a cutout 28a having the same shape as the cutout is fixed to the front of the right elongated portion 12c. As shown in FIG. 11, the left slider 27 is a member that is externally inserted into the left guide rail 3 and guided by the left guide rail 3, while the right slider 28 is external to the right guide rail 4. It is a member that is inserted and guided by the right guide rail 4.

  Next, the mounting structure of the shutter member 14 and the shutter member mounting plate 13 (the mounting plate portion 13b) fixed to the left shutter device 5, the central shutter device 6, and the right shutter device 7 will be described. As shown in FIG. 12, each shutter member mounting plate 13 has a mounting plate portion 13b. The mounting plate portion 13b communicates with a disk portion insertion hole 13c and the disk portion insertion hole 13c. In addition, a shaft portion insertion hole 13d through which a shaft portion 18c formed in the engaging member 18 described later is inserted is formed. The disk part insertion hole 13c and the shaft part insertion hole 13d are engaging member mounting holes constituting the present invention. On the other hand, the shutter side fixing plate portion 14a formed on the shutter member 14 includes a shutter side disk portion insertion hole 14e formed at a position corresponding to the disk portion insertion hole 13c, and the shutter side disk portion. A shutter side shaft portion insertion hole 14f is formed through which the shaft portion 18c formed in the engagement member 18 described later is inserted and communicated with the insertion hole. The shutter side disk part insertion hole 14e and the shaft part insertion hole 14f are engaged holes constituting the present invention. The shutter-side disc portion insertion hole 13c is partially blocked by the shutter-side disc portion insertion hole 13c, and the tip side is separated from the mounting plate portion 13b by the action of an external force such as a flat-blade screwdriver. A stopper tongue 14g that is bent and elastically deformed faces.

  Further, as shown in FIG. 12, the engaging member 18 includes one disk portion 18a formed in a disk shape, and the other disk portion 18b formed in the same shape as the one disk portion 18a. It is comprised from the axial part 18c mutually connected in the center of the said one disk part 18a and the other disk part 18b.

  The engaging member 18 before the shutter member 14 is attached to the attachment plate portion 13b is configured such that the shaft portion 18c is inserted into the disk portion insertion hole 13c after the one disk portion 18a is inserted into the disk portion insertion hole 13c. It is inserted in the shaft portion insertion hole 13d. In this state, when the other disk portion 18b is pressed into the shutter-side disk portion insertion hole 14e constituting the shutter member 14, the stopper tongue piece 14g is elastically deformed to the outside of the shutter member 14. When the other disk portion 18b is inserted into the shutter-side disk portion insertion hole 14e and the engagement member 18 is moved into the shaft portion insertion hole 14f, the stopper tongue 14g is elastically deformed. Then, the tip of the stopper tongue piece 14g thus restored faces between the one disk portion 18a and the other disk portion 18b, that is, the shaft portion 18c.

  Therefore, even when the shutter member 14 or the engaging member 18 moves relatively in the left-right direction, the tip of the stopper tongue piece 14g abuts on the shaft portion 18c of the engaging member 18. Therefore, the shutter member 14 does not fall off from the mounting plate portion 13b. Further, when each of the shutter members 14 is damaged and replaced, the stopper tongue piece 14g is elastically deformed by the tip of, for example, a flat screwdriver (not shown) to insert the disk portion on the shutter member 14 side. The shutter member 14 may be removed by separating from the hole 14e and removing the other disk part 18b constituting the engaging member 18 from the disk part insertion hole 14e on the shutter member 14 side.

  As is clear from the above description, according to the shutter device 1 according to the above embodiment, the opening 2a formed in the mechanical device double by both the bellows member 11 and the entire shutter member 14 as a whole. Therefore, even when high temperature sputtering or laser light is scattered or irradiated on the shutter device 1 inside the mechanical device, the shutter device 14 may emit the light to the outside. The shutter member 14 can be prevented from being damaged, and dust and the like from the outside are prevented from entering the inside from the outside of the mechanical device by the bellows member 11 and from the outside to the inside of the mechanical device. It is also possible to prevent intrusions from entering. Furthermore, in the shutter device 1, the expansion / contraction direction of the bellows member 11 is operated / operated in the opening / closing direction, that is, in the length direction or the width direction of the opening 2a formed in the mechanical device. Thus, the shutter device 1 according to this embodiment does not have a movement trajectory inside the mechanical device, so that the mechanical device can be compared with the existing mechanical device without significantly changing the design. It can be easily attached.

  In addition, according to the shutter device 1 according to this embodiment, even when a part of the individual shutter member 14 is damaged or deformed due to long-term use, the entire shutter device 1 is used. There is no need to replace the shutter member 14, and only the damaged shutter member 14 can be replaced. Once the shutter member 14 is mounted on the mounting plate portion 13b, the shutter tongue 14g is provided by the stopper tongue 14g. Since the disk part insertion hole 14e on the side is closed, the shutter member 14 is not dropped from the mounting plate part 13b, and the shutter member 1 is opened or closed when the shutter apparatus 1 is opened or closed or when the mechanical apparatus is driven. No abnormal noise due to 14 shakiness or the like is generated.

  Further, in the shutter device 1 according to this embodiment, since the separation preventing member 20 is arranged, each shutter member 14 is separated from the back surface of another shutter member 14 adjacent to the front end side by its own weight. However, high-temperature spatter melted from the separated gap enters from the inside or inside of the mechanical device, or irregularly reflected laser light enters from the gap to damage the bellows member 11 or burn it. Can be prevented.

  Next, a shutter device 51 according to a second embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 13, the shutter device 51 according to the second embodiment has a length in the left-right direction, and is formed on the top plate 2 of the fiber laser processing machine shown in FIG. It is arranged to open and close the rectangular opening 2a. The shutter device 51 includes a plurality of fixing plates 52 formed slightly longer than the length of the opening 2a, a left connecting member 53 that connects these fixing plates 52 to each other on the left side, and the fixing plate 52. Are connected to each other on the right side, and a shutter member 55 detachably attached to each of the fixing plates 52 is provided.

  Each of the fixing plates 52 is in an upright state with respect to the top plate 2 shown in FIG. 1, and as shown in FIG. A bent piece 52a for prevention is formed. Further, a notch (not shown) having a rectangular shape with an open bottom is formed at the lower left end of the fixing plate 52. As shown in FIG. 18, the front of the fixing plate 52 is the same as the notch. A left slider 57 in which a notch 57a having a shape is formed is fixed. In addition, a rectangular notch (not shown) whose lower side is opened is formed at the lower right end of the fixing plate 52, and a notch 58a having the same shape as the notch is formed on the front surface of the fixing plate 52. The right slider 58 is fixed. As shown in FIG. 11, the left slider 57 is a member that is externally inserted into the left guide rail 3 and guided by the left guide rail 3, while the right slider 58 is external to the right guide rail 4. It is a member that is inserted and guided by the right guide rail 4.

  The left connecting member 53 and the right connecting member 54 are formed in the same shape, and as shown in FIG. 13, FIG. 14, or FIG. One of the surfaces facing each other is referred to as one fixing plate 52, and the other is referred to as the other fixing plate 52). The left connection member 53 and the right connection member 54 are each formed of resin, and as shown in FIG. 19, one fixed plate portion fixed to the one fixed plate 52 facing each other. 53a (54a) and the other fixed plate portion 53b (54b) fixed to the other fixed plate 52. The one and other fixing plate portions 53a (54a) and 53b (54b) are inserted into a plurality of insertion holes (reference numerals are omitted) through which fastening members such as screws or rivets fixed to the fixing plate 52 are inserted. Is formed.

  In addition, the left connection member 53 and the right connection member 54 have one side fixed to the one fixed plate via one peak portion 53c (54c) formed on the upper end of the one fixed plate portion 53a (54a). One inclined surface portion 53e (54e), which is continuous with the portion 53a (54a), the other side being the valley portion 53d (54d), and one side is the one inclination through the valley portion 53d (54d). The other inclined surface portion 53g (54g) which is continuous with the surface portion 53e (54e) and the other side is continuous with the other fixing plate portion 53b (54b) via the other peak portion 53f (54f). ing. Further, the one fixed plate portion 53a (54a) and the other fixed plate portion 53b (54b) are respectively connected on both sides, and the one inclined surface portion 53e (54e) and the other inclined surface portion 53g ( 54g) is shorter than the length of the one fixed plate portion 53a (54a) and the other fixed plate portion 53b (54b). Accordingly, the one fixed plate portion 53a (54a) and the other fixed plate portion 53b (54b) are each curved as shown in FIG. 19A or 19B when no external force is applied. When the one fixed plate 52 and the other fixed plate 52 that face each other approach each other, the curved one fixed plate portion 53a (54a) and the other fixed plate portion 53b (54b) bend and become flat. Elastically deforms as it approaches.

  Further, as shown in FIG. 17 or FIG. 18, a lower end side bent portion 52b is provided between the lower ends of the respective fixing plates 52 and between the portions where the left slider 57 and the right slider 58 are fixed. A shutter member mounting plate portion 52c is formed therethrough. The shutter member mounting plate portion 52c is inclined at a predetermined obtuse angle with respect to the main plate portion (reference numerals are omitted) of the standing fixing plate 52. A shutter member 55 constituting the present invention is detachably attached to each shutter member attachment plate portion 52c. The shutter member 55 includes a shutter side fixing plate portion 55a attached to the shutter member attachment portion 52c, and an intermediate plate bent from one side of the shutter side fixing plate portion 55a via an obtuse bent portion. 55b, a main plate portion 55c bent from one side of the intermediate plate portion 55b via an obtuse angled bent portion, and a tip side plate portion 55d bent slightly upward from one side of the main plate portion 55c It consists of and. The intermediate plate portion 55b, the main plate portion 55c, and the distal end side plate portion 55d are portions that close the opening 2a as described later, and are closing plate portions that constitute the present invention.

  The shutter member 55 is detachably attached to the fixed plate 52 (the shutter member attachment plate portion 52c formed on the fixed member 52). The specific attachment structure and the attachment / detachment structure of the shutter member 55 are provided. Since this is the same as the shutter device 1 according to the first embodiment described above, description thereof is omitted.

  Further, in the shutter device 51 according to the second embodiment, the fixed plate 52 and the fixed plate 52 facing each other are fixed by the interval regulating member 61 as shown in FIG. 13, FIG. 14 or FIG. Has been. Each of the spacing regulating members 61 is integrally formed of resin, and one end side is fixed to the facing surface of one fixing plate 52 facing each other, and the other end side is opposed to the one fixing plate 52. In addition to being fixed to the opposite surface of the other fixing plate 52, a bent portion 61a is formed at the center. When the one fixed plate 52 and the other fixed plate 52 approach each other (when the shutter device 51 is contracted), the distance regulating member 61 contracts, and conversely, the one fixed plate When the 52 and the other fixing plate 52 are separated from each other (when the shutter device 51 is extended), the distance restricting members 61 extend and extend beyond the length of the distance restricting member 61. Even if it acts, it is restricted from being further extended. Note that the length of the limit that each of the interval regulating members 61 is extended (the limit that allows the one and the other fixing plates 52 and 52 to be separated) is, as shown in FIG. The intermediate plate portion 55b as the closing plate portion and the distal end side plate portion 55d correspond to a limit value that can overlap vertically. In other words, when the shutter device 51 is extended most by the interval regulating member 61 (when the opening 2 a is closed by the shutter device 51), the closing plate portions of the adjacent shutter members 55 are moved up and down. The risk of being separated from each other is prevented.

  Further, according to the shutter device 51 according to the second embodiment, as in the shutter device 1 according to the first embodiment, an existing mechanical device can be used without significantly changing the design of the mechanical device. It becomes possible to attach to easily. Further, according to the shutter device 51 according to the second embodiment, even when a part of the individual shutter member 55 is damaged or deformed due to long-term use, this shutter device 51 There is no need to replace the entire 51, and only the damaged shutter member 55 can be replaced.

DESCRIPTION OF SYMBOLS 1 Shutter device 2 Top plate 2a Opening 3 Left guide rail 4 Right guide rail 5 Left shutter device 6 Central shutter device 7 Right shutter device 11 Bellows member 11a Mountain portion 11b Valley portion 12 Fixing plate 13 Shutter member attaching plate 13a Fixing plate portion 13b Mounting plate portion 13c Disk portion insertion hole 13d Shaft portion insertion hole 14 Shutter member 14a Shutter side fixing plate portion 14e Shutter side disk portion insertion hole 14f Shutter side shaft portion insertion hole 14g Stopper tongue piece 18 Engaging member 18a Disk part 18b The other disk part 18c Shaft part 20 Separation prevention member 20a Upper fixed plate part 20b Separation prevention plate part 24 First connection plate 25 Second connection plate 51 Shutter device 52 Fixing plate 52c Shutter member mounting plate part 53 Left side Connection member 53c One mountain part 53d Valley part 53f The other mountain 54 right connecting member 54c one mountain portion 54d valley 54f other ridges 55 shutter member 55a shutter side fixing plate portion 55b intermediate plate portion 55c main plate 55d distal side plate portion 61 spaced regulating member

Claims (10)

A shutter device for opening and closing a rectangular opening formed in a machine device such as a laser processing machine, a machining center, or a machine tool such as a lathe or a milling machine,
A plurality of fixing plates each having a length in the length direction of the rectangular opening and facing each other and arranged in the width direction of the opening;
A connecting member that connects the fixing plates so that the fixing plates facing each other can be approached and separated from each other, and has a peak portion and a valley portion, and is extendable;
A shutter side fixing plate portion fixed to the lower end side of each of the fixing plates, and a closing plate portion bent from one side of the shutter side fixing plate portion and closing the opening from the distal end to the proximal end side. The shutter members adjacent to each other are partially overlapped with each other,
With
When the respective fixing plates are extended so as to be separated by the action of an external force, the overlapping area of the closing plate portions formed on each of the shutter members is reduced, the opening is closed, and the When the respective fixing plates are reduced so as to approach each other, the overlapping area of the blocking plate portions formed on each of the shutter members increases, and the opening is opened. Shutter device.   The connecting member is formed of a flexible material such as a sheet or a film, and crests and troughs are alternately formed, and the external force acts in a direction perpendicular to the length direction of the crests and troughs. The shutter device according to claim 1, wherein the shutter device is an accordion member having an area that closes the entire opening when extended most.   The connecting member connects the fixing plates facing each other, and includes a trough and crests formed on both right and left sides of the trough, and when the external force is not acting. The shutter device according to claim 1, wherein the fixing plate and the fixing plate are urged in a direction away from each other. The shutter-side fixing plate portion constituting the shutter member is detachably attached to the fixing plate or a shutter member mounting plate fixed to the fixing plate. Any shutter apparatus as described.   The shutter member mounting plate includes a fixed plate portion fixed to the fixed plate, and a mounting plate portion bent from one side of the fixed plate portion, the mounting plate portion and the shutter side fixed plate portion, The plurality of engaging holes in which the engaging members are respectively disposed and the engaged holes in which the engaging members are engaged are provided relatively to each other. Shutter device.   The fixing plate and the shutter-side fixing plate portion are relatively provided with a plurality of engaging holes in which engaging members are respectively disposed and engaged holes in which the engaging members are engaged. The shutter device according to claim 4, wherein The engaging member includes one and the other disk portions facing each other, a shaft portion formed with one end fixed to the center of the one disk portion and the other end fixed to the center of the other disk portion, With
The engaged hole is formed in the shutter-side fixing plate part, and is connected to a disk part insertion hole through which the one or other disk part is inserted, and the disk part insertion hole and the shaft. A shaft part insertion hole formed by inserting a part,
The disk part insertion hole is partially elastically deformed by closing a part of the disk part insertion hole and flexing in a direction away from the fixed plate or the shutter member mounting plate by the action of an external force. After the one or the other disk part constituting the shaft is inserted into the disk part insertion hole, the shaft part constituting the engagement member is moved while being guided by the shaft part insertion hole, so that the tip is 7. The shutter device according to claim 5, wherein a stopper tongue that can be elastically deformed and returned to its original state faces between the disk part and the other disk part. 8.   In each of the fixing plates, when the bellows member is extended, the front end side of the closing plate portion constituting the shutter member is prevented from being separated from the back surface of the closing plate portion constituting another adjacent shutter member. 8. The shutter device according to claim 2, wherein a separation preventing member is fixed.   The separation preventing member includes an upper fixing plate portion fixed to one side surface on the upper end side of the fixing plate, and a lower surface when the bellows member is extended in a substantially horizontal direction from the upper end of the upper fixing plate portion. The front end or the front end side intermediate portion is provided with a separation preventing plate portion that is in contact with the upper surface of another adjacent separation preventing member by its own weight. The shutter device according to claim 8.   Between one of the plurality of fixing plates facing each other and the other fixing plate, one end is fixed to the one fixing plate and the other end is fixed to the other fixing plate. 10. An interval restricting member is provided for restricting the one fixed plate and the other fixed plate to be separated from each other when the fixed plate and the other fixed plate are separated from each other by a predetermined distance. Any shutter device.