JP2011099271A - Sheet case for sheet shutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet case for a sheet shutter, which can be easily and inexpensively manufactured by dividing a case body into a corner joint and a circumferential wall plate, and connecting the both. <P>SOLUTION: The sheet shutter includes a cylindrical sheet case 4 provided with a sheet drum 5 for delivering a sheet 2 forwardly and backwardly inside, and a strut having sheet guide portions disposed on lateral sides of the sheet case 4 to guide and support both sides of the sheet 2 so as to be movable upwardly and downardly, and performs opening and closing operation of the sheet 2. A cylindrical case body 6 of the sheet case 4 is formed separately as corner joints 26a, 26b forming corner portions and a circumferential wall plate 27 between the corner portions, joint portions 31 connecting side edges 29 in the case circumferential direction of the circumferential wall plate 27 are formed on both side edges in the case circumferential direction of the corner joints 26a, 26b, and the joint portions 31 are connected to the circumferential wall plate 27, whereby the sheet case 4 is constituted. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a seat case for a seat shutter installed at an entrance / exit of a building such as a factory or a warehouse.

Conventionally, seat shutters installed at entrances and partitions of buildings such as factories and warehouses have seat casings with seat drums that feed out the seats so that they can be advanced and retracted, along the walls at the top of the columns that stand up right and left such as the entrances and exits. The seat is installed in a horizontally oriented state, and the seat is guided by a seat guide portion provided on the support column by forward and reverse rotation of the seat drum so that the seat can be raised and lowered (for example, Patent Document 1).
The seat case of the above-mentioned patent document 1 is arranged along the peripheral wall with respect to the left and right end plates having a square shape, and a peripheral wall plate formed by bending a series of at least the front surface and the upper surface or the lower surface side is overlapped and screwed. It is configured so as to form a cylinder with a square cross section by overlapping another peripheral wall plate on the surface side and screwing. In addition, the peripheral wall plates are overlapped on the side edges adjacent to each other in the circumferential direction, and this overlapped portion is screwed at a predetermined interval in the lateral direction to prevent deformation of each peripheral wall plate formed of a thin iron plate. Are joined together.

JP 2001-115755 A

The seat shutter disclosed in Patent Document 1 is prone to deformation of a long peripheral wall plate formed by bending the front corner portion into an arc shape and other peripheral wall plates, and both are attached to the peripheral walls of the left and right end plates. Moreover, in order to screw the adjacent peripheral wall plates together, it is necessary to use an assembly jig in the factory or to perform assembly with a plurality of workers while maintaining accuracy. In addition, since there are a large number of screwing points, the assembly work of the seat case becomes complicated. Further, when the seat case assembled in the factory is shipped to the installation site, there are disadvantages such as complicated and bulky packing and high transportation cost.
Furthermore, since it is difficult to assemble and locally disassemble the seat case at the site where the seat shutter is installed, there is a problem that it is difficult to perform seat shutter installation work and maintenance work such as inspection and repair in the seat case.

  In order to solve the problem, the present invention firstly has a cylindrical seat case 4 that houses a seat drum 5 that feeds the seat 2 so as to be able to advance and retreat, and both sides of the seat 2 that are disposed on the left and right sides of the seat case 4. A seat shutter having a seat guide portion 11 that guides and supports the seat 2 so as to be movable up and down, and in a seat shutter that opens and closes the seat 2, a case body 6 that forms the cylindrical shape of the seat case 4 is formed at a corner that forms a corner portion. A joint portion formed by dividing the joints 26a, 26b and the peripheral wall plate 27 between the corner portions, and connecting the side circumferential side edges 29 of the peripheral wall plate 27 to the opposite sides of the case circumferential direction to the corner joints 26a, 26b. 31 is formed, and the seat case 4 is configured by connecting the joint portion 31 and the peripheral wall plate 27.

  Second, ribs 42 project from the inner side surfaces of the corner joints 26a and 26b in the drum axial direction, and at least end portions of the ribs 42 are used as screw bosses 43, and each screw boss 43 covers the open end of the seat case 4. The seat case 4 is configured by screwing the end plates 6a and 6b from the outside.

  Third, the joint body 28 of the corner joints 26a and 26b is formed in a cylindrical hollow cross section.

  Fourthly, a connection portion 29 formed by folding is provided at the end of the peripheral wall plate 27, and the joint portion 31 of the corner joints 26a and 26b is formed in a groove-like cross section that accommodates the connection portion 29 by inserting or fitting, The connection portion 29 and the joint portion 31 are connected by being inserted or fitted.

  Fifth, the peripheral wall of the seat case 4 is formed into a rectangular cross-section by sequentially combining four peripheral wall plates 27 in a substantially orthogonal direction, and the corner joints 26a are formed at the upper and lower corner portions on the front side of the seat case 4. The front corner joint 26a is formed by being inclined in a chamfered manner, and the rear corner joint 26b is formed by intersecting the corner portions on the back surface of the seat case 4 at right angles.

  Sixth, the groove-shaped cross section of the joint portion 31 is formed with respect to the joint body 28 so that the front corner joint 26a intersects the front peripheral wall plate and the upper and lower peripheral wall plates at an obtuse angle when assembled. It is characterized in that the inner angle is made obtuse and released.

  Seventh, the groove-shaped cross section of the joint portion 31 of the back corner joint 26b is characterized in that one is released in the horizontal direction and the other is released in the substantially vertical direction.

  Eighth, the corner widths 26a and 26b on the front side and the back side of the seat case 4 are approximately equal in width and are extruded with a plastic material.

  According to the first aspect of the present invention, the case body of the seat case is divided into a plurality of corner joints forming the corner portion and a peripheral wall plate between the corner portions in the case circumferential direction, and formed on both sides of the corner joint. By connecting the sides of each peripheral wall plate to the joint part, it is possible to easily manufacture a cylindrical case body by a simple operation of inserting or fitting the corner joint and the peripheral wall plate that are made into child parts. Can do. Further, the assembly and disassembly of the seat case at the installation site of the seat shutter can be easily performed, and the installation operation of the seat shutter and the maintenance work such as inspection and repair in the seat case can be efficiently performed.

  According to the invention of claim 2, ribs are provided in the drum axial direction on the inner side surface of the corner joint, and the end plate is screwed to the corner joint rib by using the end portion of the rib as a screw boss. It can be easily and firmly attached. Further, since the attached end plate reinforces each corner joint, the seat case can have a rigid structure.

  According to the invention of claim 3, by forming the joint body of the corner joint in a cylindrical hollow cross section, it is possible to increase the weight and strength of the corner joint and to connect the peripheral wall plates.

  According to the invention of claim 4, by forming the connection portion at the end portion of the peripheral wall plate, the peripheral wall plate can be easily connected to the corner joint while preventing the deformation of the peripheral wall plate. In addition, the contact area of the connecting portion can be widened to join the joint portion without rattling.

  According to the invention of claim 5, by connecting the front corner joints at the top and bottom of the front side of the seat case and connecting each peripheral wall plate with the corner portions inclined in a chamfered shape, the front side without bulking the corner portions. Can be covered. Further, the upper and lower rear corner joints on the rear side connect the peripheral wall plates in an orthogonal posture, so that the rear side can be covered with a large area in the vertical direction. Thereby, while making the sheet case of a square cross section into the shape along the seat drum on the front side, it can be made into the shape along the wall surface of the vertical direction on the back side.

  According to the invention of claim 6, by forming the groove-shaped cross section of the joint part with an obtuse internal angle with respect to the joint main body and releasing the front peripheral wall plate and the upper and lower peripheral wall plates by the front corner joint, It is possible to connect and assemble so that the inner angle is inclined to an obtuse angle.

  According to the seventh aspect of the present invention, each of the joint portions is formed by the rear corner joint by forming the rear corner joint having a joint portion in which the groove-shaped cross section is released in the horizontal direction and a joint portion released in the vertical direction. It is possible to connect and assemble the peripheral wall plates to be connected so as to cross each other at right angles.

  According to the eighth aspect of the present invention, convenience such as manufacture and handling of parts can be improved by setting the corner joints installed at a plurality of locations of the seat case to the same width. Further, it is possible to pack in a compact manner with the corner joints stacked, and to reduce packing and transportation costs.

FIG. 3 is a front view showing a partially broken sheet shutter to which the present invention is applied. It is a sectional side view which shows the structure of the principal part of FIG. FIG. 2 is a front sectional view showing a left side configuration of the seat case of FIG. 1. It is a disassembled perspective view which shows the structure of a sheet | seat guide part. It is a disassembled perspective view which shows the structure of a seat case. It is a perspective view of the principal part which shows the assembly state of the seat case of FIG. It is a sectional side view which shows the structure of a seat case and a seat drum. It is a decomposition | disassembly side sectional view which shows the structure of the corner joint of FIG. 7, and a surrounding wall board.

  An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a seat shutter that is mainly installed at the entrance of a building, and includes a seat 2 for a shutter, a support 3 (side frame) configured as a guide member that supports the left and right sides of the shutter, and guides the vertical movement. It is composed of a box-shaped seat case 4 or the like that houses two opening / closing mechanisms. The column 3 is mounted and fixed along a column or wall that is constructed at the entrance of the building, and the seat case 4 is installed sideways along the beam or wall of the building and is placed on the left and right columns 3 It is assembled.

In the illustrated example, the seat shutter 1 is detachably connected to both sides of a seat case 4 by mounting members 3a that are fixed to the upper outer side of the column 3 while being placed on the left and right columns 3.
The seat case 4 includes a seat drum (feeding device) 5 as a shutter opening / closing mechanism inside, and winds and feeds the sheet 2 by forward and reverse rotation of the seat drum 5.
The seat 2 is supported by seat guides configured on the left and right support columns 3 so that both sides can be moved up and down, and can be moved up and down to open and close the entrance.

First, the overall configuration of the sheet shutter 1 will be described with reference to FIGS. The seat case 4 forms a hollow case chamber by detachably attaching end plates 6a and 6b to both sides of a case body 6 having a rectangular cross section in a side view, and left and right end plates in the case chamber. A hollow cylindrical sheet drum 5 rotatably supported by 6a and 6b is accommodated in the drum axial direction. Further, an opening 6 c that allows the seat 2 to move up and down is formed in the lower rear portion of the case body 6 so as to communicate with the left and right support columns 3.
The right end plate 6a is supported on the inner side by facing the inside of the seat drum 5 by attaching the base of the cylindrical motor 7 with bolts. The motor 7 has a driving body 8 formed of a concavo-convex ring on the driving shaft 7 a, and the seat drum 5 is rotated forward and backward by spline fitting the driving body 8 to the inner surface of the seat drum 5.

The left end plate 6b is attached to the inner surface so as to close the left end portion of the case body 6 by rotatably supporting a support shaft 8b of an attachment plate 8a attached to the left end portion of the seat drum 5. As a result, the seat drum 5 is pivotally supported in the seat case 4 in a horizontal manner, and as the motor 7 rotates forward and backward, the seat 2 is unwound (advanced) and retracted (retracted). Open and close.
In addition, the opening / closing operation of the seat 2 is performed in the same manner as in the prior art by controlling forward / reverse rotation of the motor 7 based on the manual operation command of the operation switch 9a installed on the control panel 9 and the detection command of the detection unit 9b for detecting the passing body. Is done by.

The sheet 2 is formed of a rectangular curtain made of a synthetic resin material having translucency, flexibility, and the like, and the upper end (base side) is attached to the peripheral surface of the sheet drum 5 along the axial direction. The illustrated sheet 2 is provided with a plurality of piece-like guide protrusions 10 having a known configuration along both side edges of the curtain body, and is configured on the inward facing surface side of each column 3. The guide projection 10 is accommodated in the sheet guide portion 11 that is slidably engaged. As a result, the seat 2 performs a smooth raising / lowering operation while holding the lateral sheet tension while preventing the both sides of the seat from coming off.
Further, the lower end of the seat 2 is provided with a grounding portion 12 that is grounded and has airtightness in the horizontal direction on the ground or floor surface (hereinafter referred to as the floor surface) in the closed state in which the seat 2 is lowered. ing. The grounding portion 12 also serves as a weight portion with an internal weight, and urges the seat 2 downward by the weight.

  As shown in FIGS. 3 and 4, the seat guide portion 11 has a column 3 having a simple rectangular cross section, and a groove 13 is formed on the inward surface in the column direction, and the outer rail has a U-shaped cross section in the groove 13. 14 is fitted and the end part of the side wall 14a which makes a pair before and after is fixed. Then, the inner rail 16 and the seat return guide 17 connected to the upper portion of the inner rail 16 are fitted into the rail groove 14b formed between the side walls 14a, 14a of the outer rail 14, and are detachably attached. Yes.

  The outer rail 14, the inner rail 16, and the seat return guide 17 are all made of a synthetic resin material having wear resistance and predetermined flexibility. Further, the inner rail 16 and the seat return guide 17 are provided with inward engagement guides 21 for receiving and accommodating guide protrusions 10 attached to both ends of the seat 2 so as to be slidable up and down. The sheet return guide 17 has a sheet stopper piece 23 projecting inwardly on the upper portion of the engagement guide 21 and contacting stoppers 22 projecting on both sides of the upper portion of the grounding portion 12 of the sheet 2.

  Next, the operation and usage mode of the sheet shutter 1 will be described. In the sheet shutter 1, the rotation of the sheet drum 5 is stopped with the position immediately before the sheet 2 is wound around the sheet drum 5 and the stopper 22 contacts the sheet stopper piece 23 of the sheet return guide 17 as the highest position. Control rotation. Then, in this most elevated position, the lowering standby position in which the grounding portion 12 is stopped above the return groove of the sheet return guide 17 is set. When the seat drum 5 is fed out and rotated and the sheet 2 is fed out, the guide protrusions 10 at both ends of the sheet 2 are guided by the inner rails 16 of the sheet guide portions 11 formed on the left and right columns 3 and slide down to contact the ground. The seat drum 5 automatically stops at a position where the section 12 contacts the floor, and the front door is closed in a state where the seat 2 is stretched in the width (lateral) direction and slack is restricted.

  In the seat shutter 1 configured as described above, the seat case 4 includes a cylindrical case body 6 as shown in FIGS. 5 to 8, corner joints 26 a and 26 b that form front and rear corner portions, and each corner. It divides and forms with the surrounding wall board 27 between parts. The corner joints 26 a and 26 b are formed with joint portions 31 that connect the side edges 29 of the peripheral wall plate 27 in the case circumferential direction on both sides of the joint body 28 in the circumferential direction of the case. The cylindrical case body 6 can be integrally formed by connecting the side edges 29.

  That is, each of the corner joints 26a and 26b is formed such that the joint body 28 has a hollow cross section, thereby reducing the weight of the member and increasing the strength against bending and twisting loads. Further, the joint portion 31 that matches the cross-sectional shape of the side side (connecting portion) 29 of the peripheral wall plate 27 has strength by the end walls 28a formed in the thickness direction on both sides of the joint body 28 in the circumferential direction of the case. Forming. Thereby, each joint part 31 connects stably the connection part 29 formed in the U-shape by the side-turning process means etc. to the edge part of the surrounding wall board 27 by a simple insertion or a fitting means. Can do.

Each joint portion 31 in the illustrated example has a connection groove 34 (in which an outer connection piece 32 and an inner connection piece 33 projecting from the end wall 28a side of the joint body 28 are extended in parallel, and one of them is released between them. 34a) is formed, and the connection portion 29 having the U-shaped cross section is inserted into the connection groove 34 (34a) for connection. The inner connection piece 33 of the joint portion 31 is provided with a stopper 36 that protrudes toward the connection groove 34 at the tip.
As shown in FIGS. 7 and 8, the corner joints 26a and 26b and the peripheral wall plate 27 having the above-described configuration are easily inserted into the connection groove 34 because the connection portion 29 is elastically deformed when being inserted or fitted. In addition, since they have a large contact area with each other, they can be joined without backlash. The corner joints 26a, 26b and the peripheral wall plate 27 can also be connected by inserting the connection portion 29 into the connection groove 34 from the axial direction.

In addition, the inserted peripheral wall plate 27 positions the plate end 37 of the U-shaped connecting portion 29 between the stopper 36 and the end wall 28a of the connecting groove 34, and makes the plate end 37 contact the stopper 36. Therefore, it is possible to easily assemble the peripheral wall plate 27 and the corner joints 26a and 26b so as not to be separated from each other.
When both are removed, the corner joints 26a and 26b and the peripheral wall plate 27 can be easily detached by shifting the connecting portion 29 relative to the connecting groove 34 in the axial direction. The corner joints 26a, 26b and the peripheral wall plate 27 can be connected to the outer connecting piece 32 and the peripheral wall plate 27 by a stopper 38 such as a tapping screw, if necessary.

The corner joints 26a and 26b are formed by making the front corner joint 26a formed by inclining the corner portion on the front side in a chamfered manner in the seat case 4 having a rectangular cross section and the corner portion on the back surface of the seat case 4. The back corner joint 26b is formed so as to intersect with each other.
The front corner joint 26a has a groove-shaped cross section formed in the joint portion 31 as a connection groove 34 having a shape in which the inner angle is formed to be an obtuse angle with respect to the joint body 28 and is released. It is possible to connect the upper peripheral wall plate 27 and the lower peripheral wall plate 27 so that the inner angle is inclined at an obtuse angle.

  As a result, each front corner joint 26a has the upper peripheral wall plate 27 and the front peripheral wall plate 27, and the front peripheral wall plate 27 and the lower peripheral wall plate with the corners being inclined in a chamfered shape at the top and bottom of the front side. 27 can be connected to each other to form a smooth front cover that substantially conforms to the cylindrical shape of the seat drum 5 in a side view, and can be covered with a compact cover structure that does not bulk the corner portion. In addition, if the front corner joint 26a has a shape in which the joint body 28 is curved in a side view, the front side of the seat drum 5 can be covered with an arcuate surface.

The rear corner joint 26b has, on both sides of the joint body 28, a connection groove 34a in which one of the groove sections of the joint portion 31 is released in the horizontal direction and a connection groove 34b in which the other groove section is released in a substantially vertical direction. Each is formed.
As a result, the rear corner joint 26b disposed on the upper rear side of the seat case 4 is connected to the connection groove 34a of the joint portion 31 in which the groove-shaped cross section is released in the horizontal direction in the upper rear corner portion. 29 can be inserted and connected, and the connecting portion 29 of the back peripheral wall plate 27 can be inserted and connected to the connecting groove 34b of the other joint portion 31 that releases the groove-shaped cross section in a substantially vertical direction.

The rear corner joint 26b on the lower side of the rear surface is arranged in a state where the upper and lower sides are inverted with respect to the rear corner joint 26b, and the connection groove 29 that opens the lower connection portion 29 of the back side peripheral wall plate 27 in the vertical direction. 34b can be inserted and connected.
The seat case 4 having the above-described configuration has the back surfaces thereof connected by the upper and lower back corner joints 26b and 26b and the middle back side peripheral wall plate 27 in a state where the adjacent peripheral wall plates 27 are connected in an orthogonal posture by the respective back corner joints 26b. A large area can be achieved, and the contact stability with the wall surface of the building can be enhanced. In the illustrated back corner joint 26b, a reinforcing intermediate rib 41 is provided between the upper and lower joint portions 31 to form a space portion, and wires are bundled and wired using this space portion. The intermediate rib 41 and the inner connecting piece 33 can be supported in an orderly manner.

  Each of the corner joints 26a and 26b has a rib 42 protruding from the inner surface in the drum axial direction, and at least an end portion of the rib 42 is used as a screw boss 43, and the end plates 6a and 6b are tapped screws or the like from the outside. It also serves as an end plate attachment member that can be screwed with a screw 44. That is, the rib 42 in the illustrated example is integrally provided along the inner connecting piece 33, has a diameter that forms a pilot hole into which the screw 44 can be screwed, and has a C-shaped cross section that is released on the inner surface. The groove 46 is formed.

  With this configuration, the corner joints 26a and 26b can simultaneously form the joint body 28, the rib 42, the rib groove 46, the rib groove 46, and the like by processing means such as extrusion or drawing with an aluminum material or a synthetic resin material. As a result, the rib groove 46 can be a pilot hole of the screw 44, and the screw boss 43 can be easily configured without requiring machining. In this way, the corner joints 26a and 26b can be easily and easily attached to the end plates 6a and 6b by utilizing the structure of the rib 42, and the attached end plates 6a and 6b connect the respective corner joints 26a and 26b. Since the reinforcing frame is positioned and connected, the seat case 4 can have a rigid structure, and the side surface of the case body 6 can be closed.

The opening 6c of the seat case 4 is inserted into the rear corner joint 26b on the lower side on the rear side and the connection portion 29 on the peripheral wall plate 27 on the lower surface side that is inserted into and supported by the lower corner joint 26a. It is formed between the support member 47 to be supported.
The opening 6c is provided with sliding contact members (seal) 51 and 52 that are slidably contacted in the sheet width direction with respect to the sheet 2 that moves up and down from the front side and the back side, and ribs of the support member 47. The groove 46 and the rib groove 46 of the back corner joint 26b are used for attachment. As a result, the sliding contact members 51 and 52 can block the wind that is about to flow into the opening 6c, and can elastically regulate the shaking of the seat 2 in the front-rear direction.

  Furthermore, the seat case 4 of the embodiment has corner joints 26a and 26b installed at a plurality of positions thereof having substantially the same width and length, thereby facilitating manufacture and transportation and convenience of handling and the like. Increases sex. That is, the front corner joints 26a and 26a arranged at the top and bottom of the front side have the same width, length, thickness and shape, and the rear corner joints 26b and 26b have the same shape and size. Further, although the front corner joint 26a and the rear corner joint 26b are different in shape, the width and length are substantially the same. As a result, the plurality of corner joints used in the seat case 4 can be made into two types without increasing the number of manufacturing molds, and each front corner joint 26a and the rear surface are used when used for the seat shutter 1 having different sizes. The corner joint 26b can be manufactured simply by cutting together with a predetermined size in accordance with the case body width in advance.

  In the seat shutter 1 configured as described above, the case main body 6 of the seat case 4 is divided into a plurality of corner joints 26a, 26b forming the corner portion and a peripheral wall plate 27 between the corner portions in the case circumferential direction. Since the side portions (connection portions) 29 of the peripheral wall plates 27 are connected to the joint portions 31 formed on both sides of the corner joints 26a and 26b, the corner joints 26a and 26b are connected to the respective corner joints 26a and 26b. The cylindrical case body 6 can be easily manufactured simply by inserting or fitting the corresponding peripheral wall plate 27.

  Therefore, since the assembly of the seat case 4 can be facilitated at the site where the seat shutter 1 is installed, the cost and labor of transporting the pre-assembled seat case 4 in a manufacturing factory like the conventional one can be reduced. It is possible to save labor and make installation work at the installation site simple and inexpensive. Further, it is possible to save labor for troublesome work and work such as processing and welding of large parts manufactured by large brakes and press machines in a manufacturing plant, assembling work using a large number of screws, and packing.

  Further, the case body 6 formed in a cylindrical shape by connecting the corner joints 26a and 26b and the peripheral wall plate 27 is attached to the end plates 6a and 6b using the ribs 42 of the corner joints 26a and 26b. In addition to being able to have a structure, it is easy to assemble and disassemble the column 3 erected at the entrance of the building, and the installation work of the seat shutter 1 and the maintenance work such as inspection and repair in the seat case 4 are also possible. Can be done efficiently.

  Further, since the plurality of corner joints 26a and 26b have substantially the same width, it is possible to manufacture and assemble the parts with standardized parts, and the peripheral wall plate 27 can also be made into a simple part as a child part. . As a result, when the corner joints 26a, 26b and the peripheral wall plate 27 are transported to the installation site of the seat shutter 1, the same kind of corner joints can be packed together in a stacked state, and the packing form can be compactly standardized. be able to.

  Different corner joints have the same width, so that a compact package can be achieved even if a plurality of corner joints are mixed. Moreover, the surrounding wall board 27 can be similarly packed. In addition, it is possible to greatly reduce the transportation cost when assembling the seat case 4 without assembling at the factory, and to improve convenience such as unpacking and handling of parts. .

DESCRIPTION OF SYMBOLS 1 Sheet shutter 2 Sheet 3 Support | pillar 4 Sheet case 5 Sheet drum 6 Case main body 6a, 6b End plate 11 Sheet guide part 26a Corner joint (front corner joint)
26b Corner joint (rear corner joint)
27 Peripheral wall plate 28 Joint body 29 Side (connection part)
31 Joint part 42 Rib 43 Screw boss

Claims (8)

  A cylindrical seat case (4) that houses a seat drum (5) that feeds the seat (2) forward and backward, and is arranged on the left and right of the seat case (4) so that both sides of the seat (2) can be moved up and down. In a seat shutter having a column (3) having a seat guide portion (11) for guiding and supporting, and for opening and closing the seat (2), a case body (6) having a cylindrical shape of the seat case (4) is provided with a corner. The corner joints (26a) and (26b) forming the portion and the peripheral wall plate (27) between the corner portions are formed separately, and the corner joints (26a) and (26b) have peripheral walls on both sides in the case circumferential direction. A joint part (31) that connects the side edges (29) in the case circumferential direction of the plate (27) is formed, and the seat case (4) is configured by connecting the joint part (31) and the peripheral wall plate (27). To see Sheet case of the shutter.   Ribs (42) are projected in the drum axial direction on the inner surfaces of the corner joints (26a), (26b), and at least the ends of the ribs (42) are used as screw bosses (43). The seat case of the seat shutter according to claim 1, wherein the seat case (4) is constituted by screwing end plates (6a), (6b) covering the open end of the seat case (4) from the outside.   The seat shutter seat case according to claim 1 or 2, wherein the joint body (28) of the corner joints (26a), (26b) is formed in a cylindrical hollow cross section.   A connection part (29) formed by folding is provided at the end of the peripheral wall plate (27), and the joint part (31) of the corner joint (26a), (26b) is inserted or fitted into the joint part (29). A seat case for a seat shutter according to claim 1, 2 or 3, wherein the seat portion is formed in a groove-like cross section and is connected by inserting or fitting the connecting portion (29) and the joint portion (31).   The peripheral wall of the seat case (4) is formed by combining four peripheral wall plates (27) in a substantially orthogonal direction to form a rectangular cross-section cylinder, and the corner joint (26a) is formed on the upper and lower sides of the front side of the seat case (4). The front corner joint (26a) formed by inclining the corner portion of the seat in a chamfered shape and the rear corner joint (26b) formed by intersecting the rear corner portion of the seat case (4) orthogonally. Item 1. The sheet case of the sheet shutter according to item 1 or 2 or 3 or 4.   When the front corner joint (26a) is assembled, the groove-shaped cross section of the joint portion (31) is formed in the joint body (28) so that the inner angle of the front side peripheral wall plate and the upper and lower peripheral wall plates intersect at an obtuse angle. The seat case of the seat shutter according to claim 1, 2, 3, 4, or 5, wherein the interior angle is made an obtuse angle and released.   7. A seat according to claim 1 or 2 or 3 or 4 or 5 or 6 wherein the groove-shaped cross section of the joint portion (31) of the rear corner joint (26b) is released in one horizontal direction and the other in a substantially vertical direction. Shutter seat case.   The cross-sectional width of each of the corner joints (26a), (26b) on the front side and the back side of the seat case (4) is approximately equal to each other, and is formed by extrusion molding with a plastic material. Or a seat case of 5 or 6 or 7 sheet shutter.

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