JP2008190255A - Sheet shutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet shutter capable of quickly opening and closing operation by energizing descending movement of a sheet, and capable of reducing the number contact troubles in contact of a grounding part with an abutment object. <P>SOLUTION: The sheet shutter 1 carries out opening and closing operation by holding the sheet 2 provided with the grounding part 11 having a flexible core 13 so as to reciprocate by guide grooves 26 of struts 3, 3 forming a shutter attachment opening. In the sheet 2, along with the flexible core 3 having flexibility and elastically deforming in the grounding part 11, a weight core 7a having rigidity with a larger mass than the flexible core 13 is provided above the flexible core 13 with an abutment buffer interval L shorter than a core arrangement interval H substantially in parallel with the flexible core 13. The weight core 7a is formed shorter than the flexible core 13 and a plurality of cores 7 inserted in and supported by the guide grooves 26. A side edge part 2b formed with a core supporting width S having flexibility on both sides of the weight core 7a is inserted in and supported by the guide groove 26. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

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

Conventionally, a sheet shutter that moves the shutter seat up and down by forward / reverse rotation of the motor on the left and right pillars standing at the entrance and partition of a building such as a factory or warehouse, etc. A plurality of core materials to be held are arranged in the sheet feeding direction (length direction), a weight core material having a weight greater than that of the core material is provided in the vicinity of the upper portion of the grounding portion of the sheet, and the grounding portion has flexibility and elasticity. A configuration in which a buffer core material that is elastically deformed is already known (for example, Patent Document 1).
The seat shutter is detachably attached to the core material, weight core material and flexible core material provided in the left and right widths of the sheet, and the core material support tool having the support portions inserted into the guide grooves of the support column is detachable. The sheet is guided and moved along the support column by inserting the support portion together with the side portions of the guide into the guide groove.
JP 2006-225936 A

In the sheet shutter shown in Patent Document 1, the weight core material is disposed with a contact buffering interval provided immediately above the flexible core material below the seat, so that the grounding portion that contacts the contact object is located upward. When bending, the contact buffering interval is set as a bending allowance, and the contact portion is allowed to be bent to reduce the contact impact, thereby preventing the contact object from being damaged. In addition, since the heavy and heavy weight core material has a contact buffering interval, there is an advantage that direct contact with a contact object or a human body can be avoided via the grounding portion.
However, the sheet shutter supports both the core material, the weight core material, and the buffer core material by inserting both of them into the guide groove of the support column, so that when the grounding part contacts the contact object when the seat is lowered, When the sheet is lowered in a state where contact is restricted, the upper weight core material and the core material are in contact with each other in order to be in contact with the flexible core material and are inclined to one side.

And, as described above, when the contact load continues in the state where each core material contacts and causes an inclination operation, the side ends of the flexible core material and the weight core material and the core material contact each other and interfere with each other. Further, when subjected to a load in the front-rear direction, the flexible core material, the weight core material, and the like are difficult to remove from the guide groove or cannot be detached, causing contact troubles such as damage to the core materials, the guide rail, and the support column.
Therefore, an attempt is made to install each core material on both sides thereof with a core material support having a breaking strength set by plastic molding so that the core material can be freely attached and detached and inserted into the guide groove for sliding guide. When the core members gather and the core material support members interfere with each other, there is a problem that it is difficult to pull out from the guide groove, and the core material support members are not broken well and the above contact troubles are not solved.

  A sheet shutter for solving the above-mentioned problems is as follows. First, a grounding portion that supports a plurality of core members 7 that pass straight in the left-right direction with a center member arrangement interval H in the vertical direction, and grounds the floor at the lower end of the sheet. In the seat shutter 1 that opens and closes and accommodates the side edge of the seat 2 provided with the seat 2 in the guide grooves 26 of the columns 3 and 3 that form the shutter mounting opening, the grounding portion 11 of the seat 2 In addition to the flexible core material 13 that is flexible and elastically deformed, a weight core material 7a having a greater weight and rigidity than the flexible core material 13 is disposed above the flexible core material 13 and a contact buffering interval shorter than the core material arrangement interval H. L is provided in a substantially parallel shape, and the weight core 7a is formed shorter than the total length of the plurality of cores 7 and the flexible core 13 inserted and supported in the guide groove 26, and is formed on both sides of the weight core 7a. Side part 2 having a flexible core support width S formed It is characterized in that is inserted supported by the guide groove 26 a.

  Second, it is characterized in that rollers 22 are provided on both sides of the flexible core 13 so as to make rolling contact within the guide groove 26.

  Thirdly, a core material support 9 having a roller 22 which is brought into rolling contact within the guide groove 26 at the tip of a support rod 21 having a diameter smaller than the outer diameter of the core material 7 is provided on both sides of the plurality of core materials 7, and the rollers The rotation shaft center of 22 is provided eccentric to one side of the guide groove 26.

  Fourth, the support rod 21 that pivotally supports the roller 22 is detachably provided on both sides of the core material 7 and the flexible core material 13, and the support rod 21 is formed with a smaller diameter rod than the outer diameter of the roller 22. It is said.

  Fifth, the core material support 9 provided on the core material 7 is formed of a plastic material, and the lowermost core material support 9a provided on both sides of the flexible core material 13 is formed of a member having a weight and breaking strength larger than those of the core material support 9. It is characterized by doing.

  Sixth, the length of the weight core material 7a is approximately the same as the length of the flexible core material 13 provided with the support rods 21 that support the rollers 22 on both sides.

  Seventh, an airtight holding member 32 is provided on a guide surface on one side of the guide groove 26 to cover the opening of the guide groove 26 in a flexible manner, and the sheet 2 is decentered by the airtight holding member 32. It is characterized by pressing and urging toward the support direction side.

  The present invention has the following effects by being configured as described above. A weight core material is provided above the flexible core material with a contact buffering interval, and the weight core material is shorter than the total length of the core material and the flexible core material, and is supported by the sheet to guide both sides of the weight core material. Without inserting into the groove, the side part having the core support width is inserted and supported in the guide groove, and when the grounding part comes into contact with the contact object, it is flexible through the contact buffering interval and the core support width. Since the core material is flexed freely and tilted without significant resistance, contact troubles can be prevented. Further, when receiving an excessive contact load, the flexible core material can be quickly detached from the guide rail, and the core material can be removed smoothly.

  By providing rollers on both sides of the flexible core material and rolling them in the guide groove, the flexible core material can be quickly lowered and the opening / closing operation can be performed smoothly while maintaining the contact buffer interval with the weight core material. Can do. Moreover, the operation of removing the core material at the time of contact with the contact object can be performed without difficulty by rolling the roller.

  On both sides of the core material, a roller that is pivotally supported by the tip of a small-sized support rod is eccentrically provided on one side of the guide groove, so that the roller is brought into rolling contact with the guide surface on one side of the guide groove when the sheet is opened and closed. Thus, the seat can be opened and closed stably and lightly. Further, the seat can be lowered, for example, in the state of being close to the front guide surface, and the airtightness when the seat is closed can be improved.

  By forming the support rods provided on both sides of the core material and the flexible core material with a smaller diameter rod than the outer diameter of the roller, the side portion of the sheet can be brought close to the support rod within the guide groove, and the sliding surface with the guide surface can be made. Opening and closing operations that prevent contact wear can be performed smoothly.

  By forming the core material support provided on the core material with a plastic material, the support rod is surely broken when the contact load or the like is excessive, so that damage to the core material and the guide groove can be prevented. In addition, since the lowermost core support provided on both sides of the flexible core is formed of iron or the like, the weight on both sides of the flexible core is increased to assist the lowering of the grounding portion, and the contact load with the contact object or When receiving a strong wind load, the flexible core can be easily opened and closed without easily removing the flexible core from the guide groove.

  By making the length of the weight core material approximately the same as the length of the flexible core material having the lowermost heart material support on both sides, the core material support width formed on the side of the weight core material at the lower part of the sheet In addition, a flexible path composed of a contact buffering interval and a flexible core material can be formed, and sufficient flexibility in the vertical and front-rear directions can be provided. Further, a rigid path composed of a lowermost core support provided on both sides of the flexible core and a weight core supported with a short contact buffer interval immediately above the flexible core is formed, and a lower portion of the seat is formed. Since straightness is ensured, it is possible to smoothly perform opening and closing that prevents the seat from being detached even in a longitudinal load caused by a strong wind or the like.

  An airtight holding member that flexibly closes the guide groove opening is provided on the guide surface on one side of the guide groove, and the sheet is pressed and urged toward the eccentric support direction side of the roller by the airtight holding member. Thus, the airtight holding member bends the tip and presses and urges the sheet to stabilize the rolling contact of the roller to the guide surface in the eccentric support direction. The airtight holding member can improve the airtightness of the sheet by closing the side of the sheet against the guide surface when closed.

  Hereinafter, an embodiment of the present invention shown in the drawings will be described. 1 and 2, reference numeral 1 denotes a seat shutter according to the present invention, which can be opened and closed by moving the seat (shutter) 2 forward and backward on a shutter frame standing at the entrance (entrance) of a building or the like. . The shutter frame of the seat shutter 1 includes left and right support columns (side frames) 3 and 3 that are erected and fixed along a support column or wall surface of a building that forms an entrance / exit to form a shutter mounting opening (seat opening / closing interval); A gate-like frame is constituted by a hollow box-like seat case 4 connected and supported by connecting the upper portions of the columns 3 and 3.

The sheet case 4 is provided with a hollow cylindrical winding drum 5 that allows the sheet 2 to be wound and rotated. The support columns 3 and 3 are configured so that the seat 2 can be moved up and down by a sheet guide structure which will be described later.
The configuration of each part will be described below. First, the seat case 4 has a configuration similar to that of the conventional case, and end plates 4a and 4a are detachably fitted to both ends of the hollow cover frame, and the passage (hoistway) of the seat 2 is formed on the lower side of the cover frame. ) It is a box shape with 4b open.

A columnar motor 6 accommodated in the end portion of the winding drum 5 is detachably attached and fixed to the right end plate 4a by an attaching screw.
The motor 6 is engaged and supported on the right side of the winding drum 5 by a drive plate 6a provided on the motor shaft while being inserted into the right end of the winding drum 5. The left side of the take-up drum 5 is supported by a shaft support plate 6b that is supported by the left end plate 4a.

  The sheet 2 is made of a rectangular synthetic resin curtain having translucency and flexibility. The upper end (base side) of the sheet 2 is attached and fixed along the axial direction of the winding drum 5. The opening / closing operation is performed by the lowering of the feeding and the raising of the winding by reverse rotation (winding and feeding rotation). Further, the sheet 2 is provided with a plurality of core material attachment portions 2a formed in a bag shape in a side view over a substantially entire length in the longitudinal direction (feeding direction) of the curtain body with a predetermined core material arrangement interval (pitch) H. The pipe-shaped core materials 7 and 7 having a certain rigidity, the weight core material 7a and the like are inserted into each core material mounting portion 2a. Thereby, the sheet | seat 2 maintains the straightness of the width direction, and the bending at the time of opening / closing operation | movement and the bending by a wind are prevented.

As shown in FIGS. 2 to 5, the sheet 2 in the illustrated example has a core material mounting portion 2 a attached to one side surface of the single sheet 2 by a sheet bag forming member at every interval between the adjacent core material 7 and the core material 7. The core material 7 is formed in a bag shape, and the core material 7 is inserted into the core material attaching portion 2a from one side of the bag portion, and the core material support 9 described later is inserted and fixed to both ends of the core material 7.
Note that the sheet 2 is not limited to the above-described manufacturing means. For example, the upper and lower ends of the sheet pieces formed at intervals between the adjacent upper and lower core materials 7 and the core material 7 are vertically stacked, and the respective heavy contact ends are welded or It is also possible to form the bag-shaped core material attaching portion 2a into which the core material 7 is inserted by bonding by a bonding means such as adhesion.

Moreover, let the full length of the core material 7 be the length by which the both sides are inserted in the guide rail 3a which the support | pillar 3 mentioned later has. In this illustrated example, the core material 7 is inserted into the left and right ends of the core material 7 made of a round pipe material having a length shorter than the front width from the core material mounting portion 2a of the seat side portion 2b. The length is made.
As shown in FIGS. 2 and 3, the sheet 2 has flexibility at the lowermost end while maintaining the straightness in the width direction without containing the rigid steel round pipe material as described above. And a grounding portion 11 that has contact with a contact object or a floor surface when the seat 2 descends.

  The grounding portion 11 is formed by inserting a flexible core material 13 having a certain straightness and elasticity into a first housing portion 12 formed in a bag shape by folding back the lower end of the sheet 2, thereby providing a second housing. A weight core material 7 a made of a pipe material similar to the core material 7 having rigidity and being a weight material is inserted into the portion 15. The weight core material 7a is held above the flexible core material 13 with a contact buffering interval L shorter than the core material interval H between the core material 7 and the weight core material 7a.

The storage portions 12 and 15 formed in a bag shape by folding back the lower end of the sheet are joined together by means such as welding or adhesion, and the tube-shaped cross section is formed by a ground cover 16 having flexibility and wear resistance. It is bent and coated from below so as to form
Further, the grounding portion 11 in the illustrated example covers and covers a buffer cover 17 formed of rubber or sponge material on the outer periphery of the first housing portion 12 in the grounding cover 16.

  As a result, the seat 2 can be urged to move downward by the weight of the grounding portion obtained by adding the weight of the weight core material 7a to the weight of the flexible core material 13 and the buffer member 17 of the grounding portion 11, and is also grounded as it descends. When the part 11 comes into contact with the floor surface, the grounding cover 16 having flexibility is pressed and deformed by weight, and performs grounding having airtightness following the floor surface.

  The grounding portion 11 waits to close the passage 4b of the seat case 4 from below at the highest position where the sheet 2 is wound up by the winding drum 5, and the weight core material 7b is placed in the lower half of the winding drum 5. To position. When the winding drum 5 is reversed, the weight core material 7b located in the lower half of the winding drum 5 is close to the flexible core material 13 even if the flexible core material 13 of the grounding portion 11 has a lightweight structure. The drawn-out and downward movement of the seat 2 is urged by the weight thus made, so that the closing operation can be quickly performed.

  Further, since the contact buffering interval L is shorter than the core arrangement interval H between the adjacent core members 7 and 7 and the heavy weight core material 7a is brought close to the flexible core material 13, it is higher than the weight core material 7a. The plurality of core members 7 can be reduced in weight, and the opening operation can be smoothly performed without increasing the drive for raising the seat 2.

  Next, the guide structure of the sheet 2 will be described with reference to FIGS. In this sheet guide structure, each core material 7 and the flexible core material 13 have substantially the same length, and the core material 7 and the flexible core material 13 are inserted and supported in the core material mounting portion 2a and the first housing portion 12, respectively. . Further, at both ends of the core material 7 and the flexible core material 13, core material support in which a roller 22 is pivotally supported at the tip of a support rod 21 inserted into the side portion 2 b formed on both sides of the sheet 2. The tool 9 and the lowermost core material support tool 9a are interchangeably provided.

  That is, as shown in FIG. 3 and FIG. 5, the core material support 9 supports and fits the hooked mounting portions 23 with a predetermined insertion margin in both ends of the core material 7 made of a round pipe material, A support rod 21 is integrally formed at a position eccentric with a guide eccentric distance G with respect to the center of the mounting portion 23, that is, the core material 7, and the roller 22 is attached to the shaft portion 25 formed at the tip of the support rod 21. I support. The support rod 21 has a smaller diameter than the mounting portion 23, thereby forming a clearance interval K of the side portion 2b described later. The roller 22 has an outer diameter smaller than the outer diameter of the core material 7, the shaft support 22a side is made of a hard plastic material, and the outer rolling contact portion 22b is made of a soft plastic material.

  The core material support 9 is manufactured to have a certain toughness and an inexpensive structure by molding with a plastic material so that it can be broken and broken by a predetermined bending load weaker than the strength of the core material 7. This prevents damage to the long and expensive core material 7 when the sheet 2 has contact problems, and replaces only the core material support 9 that is worn or deformed or broken by contact with the contact object. Thus, maintenance work such as repair of the seat shutter 1 and parts replacement is performed easily and inexpensively.

  As shown in FIGS. 3 and 5, the guide eccentric distance G is inserted into the guide groove 26 formed by the guide rail 3a of the column 3 by inserting the roller 22 of the core support 9 and the front guide surface 26a of the guide groove 26. In the state where the eccentric support direction is determined so as to be in rolling contact with each other, the outer peripheral rolling contact surface of the roller 22 is positioned on the front side of the core material 7 and the side portion 2b of the sheet 2 can be positioned slightly rearward. As a result, the roller 22 of the core material support 9 rolls into contact with the front guide surface 26a and guides and supports both sides of the sheet 2 via the support rod 21 while restricting rolling contact with the rear guide surface 26b and irregularly corrects. One-way rotation is promoted without reverse rotation. Therefore, the sheet 2 can be easily moved up and down by reducing the sliding resistance in the guide groove 26 during the advance / retreat operation by setting the shape of the core material support 9 and the eccentric support direction of the roller 22.

Further, since the roller 22 is always in rolling contact with the front guide surface 26a, it is possible to prevent the local side of the sheet side portion 2b from being strongly pressed against the one side guide surface (front guide surface) 26a as in the prior art. In the non-sliding contact state, the guide groove 26 is smoothly moved. Accordingly, it is possible to prevent the seat 2 from being worn or torn due to sliding contact with the guide rail 3a, and to suppress the wear of the front guide surface 26a.
Further, since the support rod 21 has a smaller diameter than the mounting portion 23 and the front guide surface 26a of the guide rail 3a, the clearance interval K is formed, so that the side portion 2b which is slidably in contact with the front guide surface 26a. Can be deflected within the clearance interval K and strong sliding contact with the front guide surface 26a can be prevented.

Accordingly, even when the outer peripheral surface of the roller 22 is provided slightly inside the outer peripheral front surface of the core member 7, it is possible to prevent the side portion 2b from being worn by the strong sliding contact with the front guide surface 26a.
In addition, as shown by the dotted line in FIG. 4, when the side portion 2 b of the sheet 2 is extended to the outside of the roller 22 to improve the airtightness, when the sheet portion facing the roller 22 is locally incised, Rolling contact of the roller 22 can be performed. When the roller 22 is provided on the core 7 that is directly inserted into the guide groove 26 without using the core support 9 as described above, the roller support shaft portion is inserted in the eccentric support direction with respect to the core 7. Then, it can be performed by a structure such as mounting and fixing.

Next, the lowermost core material support 9a set on the flexible core material 13 side will be described with reference to FIG. It is desirable that the lowermost core material support 9a has the same shape so as to be compatible with the core material support 9. The mounting portion 23 and the support rod 21 are made of iron, and the plastic hook is formed at the tip of the support rod 21. A roller 22 made of a metal is pivotally supported. The lowermost core material support 9a according to the embodiment can bend the support rod 21 when a bending load of a predetermined level or more is applied while the flexible core material 13 is bent, and the bent support rod 21 bends. It can be corrected.
With this configuration, the lowermost core material support 9a can be reused even if the support rod 21 is bent, and can be used as an alternative when there is no spare when the core material support 9 is damaged. it can.

Further, in the illustrated example, the lowermost core material support 9a can be provided at an eccentric position where the roller 22 is brought into rolling contact with the front guide surface 26a in the same manner as the core material support 9, but the roller 22 is formed at the center of the guide groove 26. Or it positions so that it may roll-contact to the rear side guide surface 26b side. As a result, the seat surface on the lower end side of the seat 2 can be positioned closer to the front guide surface 26a.
That is, when the lowermost core material support 9a is provided at an eccentric position where the roller 22 is brought into rolling contact with the front guide surface 26a in the same manner as the core material support 9, the sheet surface at the lower end of the sheet 2 faces the rear guide surface 26b. Therefore, the airtightness between the front guide surface 26a and the lower end seat surface of the seat 2 is impaired. In particular, when the seat 2 is lowered, the roller 22 of the upper core material support 9 is moved toward the rear guide surface 26b due to the weight on the grounding portion 11 side, and causes a problem such that the roller 22 is lowered while swinging back and forth.

  As shown in FIG. 5, in the case of the core material support 9, the rollers 22 are positioned and fixed by screwing a sharp mounting screw 27 into the mounting portion 23 from the outside of the core material mounting portion 2a. This is done by fastening the support 9 to the core material 7 together. Further, the lowermost core material support 9a is detachably fastened to the core material mounting portion 12 and the flexible core material 13 by screwing the mounting screws 28 into the screw holes 29 formed in the mounting portion 23 from the outside of the core material mounting portion 12. can do. The lowermost core material support 9a is not limited to iron, and a member having a larger weight and breaking strength than the core material support 9, for example, a plastic core material having flexibility is inserted into the support rod 21 made of plastic. It can also be configured by means such as forming.

With the above-described configuration, the weight core 7a is positioned below the seat 2 in a state where the lowermost core support 9a provided with the flexible core 13 at both ends thereof is inserted and supported in the guide grooves 26 of the support column 3. Omitted and not supported directly by the support columns 3, it is supported by the sheet material of the side portion 2 b corresponding to the contact buffer interval L and the core material support width S.
As a result, the sheet 2 forms a flexible path A indicated by a dotted line in FIG. 2 to smoothly perform a core material upward retraction operation and a core material removal operation described later, and a rigid path B indicated by a one-dot chain line in FIG. And the opening / closing operation with the straightness of the lower part of the seat 2 can be performed smoothly.

  Next, the column 3 will be described. A pair of columns 3 and 3 assembled to a gate member such as a building form an opening 31 in the vertical direction of the inner wall facing inward, and a guide rail 3a having a guide groove 26 in the opening 31. Is fixed detachably. The support column 3 is guided to move up and down in the guide groove 26 in a state where both side portions 2b and 2b of the seat 2 and each core material support 9 and the lowest core material support 9a are inserted. (Advance / retreat operation) can be performed. In addition, in the space portion in the support column 3, harnesses for electrical wiring, various fixtures such as bolts and nuts, fixtures, and the like are accommodated and installed.

  The guide rail 3a is formed of a plastic material having wear resistance, and the guide groove 26 is formed by integrally forming the front guide surface 26a, the rear guide surface 26b, and the inner wall 26c into a U-shape in plan view. Yes. The guide rail 3a has a mounting portion 33 in which a brush-type airtight holding member 32 is detachably installed along the end portion of the rear guide surface 26b. The airtight holding member 32 is provided in the mounting portion 33. By providing this, the opening of the guide groove 26 can be closed by the brush member when the seat 2 is lowered and closed.

The airtight holding member 32 in the illustrated example has a brush structure in which a large number of flexible brushes 36 are closely planted on a belt-like attachment member 35 and supported by planting, and the attachment member 35 is inserted from one end of the attachment portion 33 and positioned. It has a simple structure.
As a result, the brush 36 as the airtight holding member 32 crosses the guide groove 26 and reaches the front guide surface 26a side, and presses the sheet side portion 2b when closed from the back surface so as to contact the front guide surface 26a. Energize.

  Then, the brush 36 that comes into contact with the protrusions such as the core member attachment portion 2a that moves up and down when the seat 2 is opened and closed is bent and retracted without causing a large resistance following the movement, and then the elasticity of the brush 36 with the passage of the protrusions. Returning to the original planting posture due to the nature, the guide groove 26 is closed in a state where the seat 2 is pressed and brought into an airtight holding state.

Further, the brush 36 urges the side 2b of the sheet 2 toward the front guide surface 26a, so that the rolling contact of the roller 22 to the front guide surface 26a is stabilized and the side as shown by the dotted line in FIG. 5 when closed. The side part 2b is brought into contact with the front guide surface 26a, so that a large ventilation that moves in the front-rear direction of the seat 2 can be prevented, and the airtightness of the seat shutter 1 can be improved.
The airtight holding member 32 is not limited to the brush type described above. For example, instead of the brush 36, a film body having elasticity and flexibility, or the film body is automatically moved along with the opening / closing operation of the sheet 2. It can also be configured to open and close.

Next, the advancing / retracting operation structure of the seat 2 will be described with reference to FIG. The motor 6 of the seat shutter 1 employs a motor with a brake that can rotate in the forward and reverse directions. The motor shaft of the motor 6 includes a detection device (not shown) such as an encoder or a sensor. (Signal) is read and judged by the control box 37, and the operation and stop of the seat 2 are performed as desired.
In addition, the seat shutter 1 can freely set the opening / closing operation of the seat 2 and the mode of the opening / closing pattern and the like by an operation switch 38 such as a remote control switch or a setting switch provided in the control box 37 to appropriately move the seat 2 forward and backward. Can be done.

  The seat shutter 1 is provided with an opening sensor (starting sensor) 39 made of an infrared sensor or the like at a high part of the support columns 3 and 3 so as to face the center of the front side. When a passing body such as a transport vehicle is detected, the motor 6 can be operated via the control box 37 by the detection signal to automatically open the seat 2 being closed.

  Further, when there is an obstacle (contacting object) below the seat 2 in a state where the seat 2 is opened on the lower side of the support post 3, an obstacle detection for restricting the lowering of the seat 2 by the motor 6 is performed. A lowering restriction sensor 41 made of infrared rays or a phototube is installed. Incidentally, the detection signal of a lowering stop sensor (not shown) installed in the grounding portion 11 can stop the motor 6 and prevent damage to the seat shutter 1 including the contact object and the seat 2 and occurrence of contact trouble. .

  This stop signal is sent to the control box 37 via a transmitting device or a wiring member (not shown) connected to the ground sensor 43. As a result, the motor 6 is stopped or reversed by a control program set in the control box 37, so that the lowering of the seat 2 can be immediately stopped or lifted and retracted at the time of contact.

  Next, the lowering restriction sensor 41 will be described with reference to FIGS. The seat shutter 1 is provided with a pair of lowering restriction sensors 41 in an attachment hole 43 of a sensor attachment cover 42 provided at a front lower detection position of the columns 3 and 3, and a pair of lowering restriction sensors 41 for an upper detection position. Directly provided. As shown in FIGS. 5 and 6, the lowering restriction sensor 41 is configured to attach and support the sensor main body 49 so that the position of the sensor main body 49 can be adjusted via a mounting guide 47 on a mounting seat 46 having an insertion hole for a mounting screw 45.

  That is, the sensor main body 49 is fitted in a mounting guide 47 having a U-shaped cross-sectional view, and the mounting position can be adjusted by the mounting screw 51. The mounting guide 47 is mounted on the upper and lower sides of the sensor hole 52 provided in the mounting seat 46. The mounting pieces 53 and 53 projecting in the direction are mounted and supported via mounting screws 55 so that the position can be adjusted. As a result, the lowering restriction sensor 41 can freely adjust the mounting position (angle) of the upper, lower, left and right with the mounting seat 46 and the mounting body 46 mounted to the mounting hole 43 of the sensor mounting cover 42 with mounting screws. Can be set quickly and assembled easily.

  The sheet shutter 1 configured as described above smoothly opens and closes by the forward / backward operation structure of the sheet 2 by the forward / reverse rotation of the winding drum 5, and the grounding portion 11, the airtight holding member 32, and the like. With this configuration, the airtightness when the seat 2 is closed can be improved. When the seat 2 is opened and closed, when the grounding portion 11 comes into strong contact with the contact object from above when the seat 2 is lowered, the grounding portion 11 first receives the contact load via the ground cover 16 by the buffer member 17. After that, the flexible core material 13 receives, and in the case of a large load, the flexible core material 13 flexes upwards to cushion the impact.

  However, when the contact load is continued, the flexible core member 13 contacts the weight core member 7a beyond the sheet bending allowance of the contact buffer interval L in combination with the lowering of the sheet 2, and the weight The core material 7a is operated to lift upward. As a result, the grounding portion 11 performs an upward retracting operation for releasing the weight core material 7a made of a rigid member upward through the contact buffering interval L, and thus the contact object and the contact object can be prevented from being damaged.

  When the contact load is further continued and the flexible core material 13 and the weight core material 7a perform a heart material contact inclination operation in which the core material 7 and the core material 7 are greatly inclined to the left and right, the flexible core material 13 is firstly operated. Since the lowermost core material support 9a comes out of the guide rail 3a and comes off, the core material 7 can also be removed from the guide rail 3a via the core material support 9, so that an excessive contact trouble is avoided by this operation of removing the core material. be able to. In the case of such a contact trouble, similarly to the conventional case, the motor 6 is reversely rotated by the trouble detecting means, so that the lowering (retreating) of the seat 2 is stopped.

At this time, the weight core material 7a provided in a substantially parallel shape with a contact buffering interval L above the flexible core material 13 provided in the grounding portion 11 includes a plurality of core materials 7 inserted and supported in the guide grooves 26, and Since it is shorter than the flexible core 13 and has a guide support structure for the sheet 2 in which the side part 2b is inserted without inserting both sides into the guide groove 26,
A flexible path A shown by a dotted line in FIG. 2 is formed to smoothly perform the upward retracting operation and the core material removing operation, and a rigid path B shown by a one-dot chain line in FIG. Therefore, the opening / closing operation can be smoothly performed while ensuring the straightness of the sheet and preventing the sheet from being detached due to a strong wind or the like.

  That is, in the lower part of the sheet 2, a flexible path A including a core support width S, a contact buffering interval L, a flexible core 13 and the like formed on both sides of the weight core 7a is formed. For example, when the flexible core material 13 is operated to tilt the core material, the lowermost core material support tool 9a that tilts upward deflects the side portion 2b having the core material support width S to be weighted. Since it does not contact the core material 7a, there is an advantage that the lifting resistance of the weight core material 7a is not added to the contact object. In addition, the flexible core 13 can sufficiently operate to tilt the core material while the lower core material support 9a contacts the upper core material 7, and the lower core material support 9a can be quickly detached from the guide rail 3a. Thus, the operation of removing the core material can be performed smoothly.

  And while having the flexible path | route A which performs the above operations, it is possible to have the lowermost core material support 9a supported on both sides of the flexible core material 13 and a short contact buffering interval L. By forming a rigid path B composed of the weight core material 7a supported immediately above the flexible core material 13, the straightness of the lower part of the seat 2 is ensured, and the seat against the load in the front-rear direction due to strong winds, etc. The opening / closing operation that prevents the disengagement can be performed smoothly. Further, since the core material 7 and the flexible core material 13 are moved forward and backward by the lowermost core material support 9a and the core material support 9 provided with the roller 22, the winding which reduces the frictional resistance during the opening and closing operation and suppresses the sliding of the seat 2. It is possible to speed up the delivery. Further, the installation cost of the seat shutter 1 in the building, the maintenance work cost, etc. can be reduced.

  Further, when the seat 2 is opened / closed or closed upon grounding, when the contact object strongly touches the grounding portion 11 of the seat 2 from the front or rear, for example, a lateral contact load received by the grounding portion 11 is applied. First, the flexible core material 13 receives and shocks are buffered by the flexible core material 13 flexing elastically. However, when the contact load continues strongly, both sides of the flexible core material 13 are connected via the flexible path A. Since the side portion 2b is added as a bending allowance, the flexible core material 13 is sufficiently bent in the front-rear direction to be buffered, and deformation and damage of the flexible core material 13 are prevented. And, by the rigid path B by the lowermost core material support 9a on both sides of the weight core material 7a and the flexible core material 13, the unreasonable withdrawal from the guide rail 3a of the lowermost material support material 9a received at this time is suppressed, After countering the contact load, the straightness of the seat 2 can be quickly restored.

  And when the local contact load with respect to the core material 7 just above the flexible core material 13 or the weight core material 7a continues further strongly, it is supported by the free bending of the side part 2b of the weight core material 7a. In this state, the lowermost core material support 9a or the core material support 9 can be removed from the guide rail 3a without taking an unreasonable posture. Accordingly, the lower core material support 9a, the core material support 9, and the guide rail 3a are reliably prevented from being deformed or damaged.

  Even if the weight core material 7a itself is subjected to a large longitudinal load, the weight core material 7a is supported by the guide groove 26 via the side portion 2b without including the heart material support tools. The core material 7a moves back and forth through the core material support width S and the contact buffering interval L of the side portion 2b without deformation to buffer the load, and a large deflection (swelling) in the front-rear direction of the lower portion of the seat 2 occurs. Because it prevents it, it can withstand strong winds.

  Further, the sheet 2 provided with the core material support 9 or the lowermost core material support 9a configured as described above elastically receives the load received by the core material 7 with the core material support 9 having a breaking strength weaker than that of the core material 7. A load or the like can be buffered to prevent or protect the core material 7 from being deformed or damaged. Then, the deformed or damaged core material support 9 or the lowermost core material support 9a is pulled out and removed without removing the core material 7 etc. when the fixing by the mounting screws 27, 28, etc. is released by an operation reverse to the assembly. Therefore, the maintenance work can be easily performed by repairing or exchanging the core material support tools.

1 is a front view illustrating an overall configuration of a sheet shutter embodying the present invention. It is a front view which shows typically the structure of the principal part of this invention of FIG. FIG. 2 is a side view showing the grounding portion and the sheet guide structure of FIG. FIG. 4 is a plan view showing the sheet guide structure of the grounding portion in FIG. 3 in a broken state. It is a top view which fractures | ruptures and shows the sheet | seat guide structure of the core material of FIG. It is a disassembled perspective view which shows the structure of a descent | fall control sensor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet shutter 2 Sheet | seat 2a Core material attachment part 2b Side edge part 3 Support | pillar 3a Guide rail 7 Core material 7a Weight core material 9 Heart material support tool 9a Bottom core material support tool 11 Grounding part 13 Flexible core material 26 Guide groove 26a Front guide surface 21 Support杆 22 Roller 32 Airtight holding member L Contact buffering interval H Heartwood arrangement interval S Heartwood support width

Claims (7)

  A sheet (2) provided with a grounding portion (11) that supports a plurality of core members (7) that pass straight in the left-right direction with a core material arrangement interval (H) in the vertical direction and that contacts the floor surface at the lower end of the sheet. The seat (2) is grounded in the seat shutter (1) which is opened and closed by accommodating the side end in the guide groove (26) of the support columns (3) and (3) forming the shutter mounting opening. In addition to the flexible core material (13) that is flexible and elastically deformed in the portion (11), a weight core material (3) having a greater weight and rigidity than the flexible core material (13) is provided above the flexible core material (13). 7a) having a contact buffering interval (L) shorter than the core material arrangement interval (H) and provided substantially in parallel, and a weight core material (7a) inserted and supported in the guide groove (26) (7) and the flexible core material (13) are formed shorter than the entire length, and flexible on both sides of the weight core material (7a). Sheet shutter, characterized in that to insert supported on that core support width (S) side portions forming a (2b) of the guide groove (26) within.   The sheet shutter according to claim 1, wherein rollers (22) are provided on both sides of the flexible core (13) to be brought into rolling contact with each other in the guide groove (26).   A core material support having a roller (22) on both sides of a plurality of core materials (7), the roller (22) being in rolling contact with the tip of a support rod (21) having a smaller diameter than the outer diameter of the core material (7) in a guide groove (26) The sheet shutter according to claim 1 or 2, wherein (9) is provided and the rotational axis of the roller (22) is eccentrically provided on one side of the guide groove (26).   A support rod (21) that pivotally supports the roller (22) is detachably provided on both sides of the core material (7) and the flexible core material (13), and the support rod (21) is formed from the outer diameter of the roller (22). The sheet shutter according to claim 1, 2 or 3, which is formed with a small diameter ridge.   The core material support (9) provided on the core material (7) is formed of plastic material, and the lower core material support (9a) provided on both sides of the flexible core material (13) is weighted and broken from the core material support (9). The sheet shutter according to claim 1, 2, 3, or 4, formed of a member having high strength.   The length of the weight core material (7a) is made substantially the same as the length of the flexible core material (13) provided with support rods (21) for pivotally supporting the rollers (22) on both sides. Or 4 or 5 sheet shutters.   An airtight holding member (32) is provided on the guide surface of one side of the guide groove (26) to close the opening of the guide groove (26) with flexibility, and the sheet (2) is rolled by the airtight holding member 32. The sheet shutter according to claim 1, 2, 3, 4, 5, or 6 that presses and urges toward an eccentric support direction side of (22).

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