JP6596400B2 - Grounding part structure of sheet for sheet shutter - Google Patents

Description

  The present invention relates to a grounding portion structure of a sheet for a sheet shutter.

  Conventionally, as a doorway for factories and warehouses, as a partition between rooms in a building, etc., sheet shutters that place importance on environmental management such as room temperature, air purification, daylighting, and quick opening and closing operations, etc. have been widely used. Also, both ends are accommodated in a seat guide attached to a support column, and a lifting guide is provided, and a grounding portion having a weight is grounded to the floor at the lower end of the seat that moves up and down, and a gap between the left and right support columns is opened and closed.

  As the weight provided in the grounding portion of the seat shutter, an iron pipe having a length of approximately the frontage width is often used. However, the iron pipe weight has excellent straightness without bending the lower end of the seat in the front-rear direction. On the other hand, when the seat is in contact with a person who passes while the seat is descending, an article in the frontage, etc. (hereinafter simply referred to as a contact body), it does not bend in the vertical direction and is inferior in cushioning. Has the disadvantage of increasing the impact impact.

  In order to improve this, it is already known from Patent Document 1 that a bottom weight is provided in a distributed manner at the left and right ends of the grounding portion, and a urethane pipe is accommodated and installed along the weight accommodating portion between the left and right weights. . In addition, in order to ground the weights arranged on the left and right sides with cushioning properties on the floor surface, a fine-grained body (weight fine-grained body) such as iron or sand is packed in a bag of a predetermined shape made of cloth or vinyl. Therefore, it is also known to make a flexible bag weight.

Japanese Patent No. 4833807

  The ground contact portion disclosed in Patent Document 1 has an advantage of superior shock-absorbing properties because the urethane pipe portion is bent and deformed locally to release an impact when contacting the contact body. However, this grounding part is inferior in the straightness of the urethane pipe part and flexes freely in the front-rear direction. The sheet that swells greatly is easily lifted upward while largely deflecting and moving the center part of the grounding part in the front-rear direction. Therefore, even if the left and right end sides of the grounding portion are airtightly grounded, there is a defect that a local gap of several millimeters to several centimeters is generated between the center-side grounding surface of the grounding portion and the floor surface. And if this local gap continues for several millimeters, it will allow the entry of small insects such as ants, cockroaches or slugs (walking insects), especially at night, from this small gap. Become.

  Furthermore, when the grounding portion having the bag weight as described above is frequently subjected to fluctuations in the air pressure inside and outside the frontage accompanying opening and closing of the seat, or when used under installation conditions that are easily affected by wind, Since the grounding part, which is inferior in straightness, repeatedly moves back and forth while sliding on the floor, the weight storage piece and weight bag of the soft resin fabric sheet are also slashed from the break of the protective cover that will eventually rub off over long periods of use. Will be torn. In addition, the weight bag of the grounding part may be torn when it comes into contact with a sharp object. And the torn bag weight has the fault of scattering a large amount of internal fine particles on the floor surface from each torn location when the sheet is raised.

  Therefore, for example, if a sheet shutter installed in a food factory or the like causes the above-mentioned particle scattering, it is necessary to completely recover the particles in order to prevent mixing of food, and the subsequent risk handling work becomes complicated. . And since the damaged bag weight cannot perform the emergency treatment of a grounding part promptly, there exists a problem which produces troubles, such as having to stop food production for a long time.

In order to solve the above problems, the grounding portion structure of the sheet for seat shutter of the present invention is as follows:
First, a grounding portion that stores weights 35 along the weight storage portion 38 in the left-right direction at the lower end of the seat 2 that supports both ends of the left and right seat guides 11 and guides the lifting operation, and extends the seat 2 to ground. In the grounding portion structure of the sheet for seat shutter provided with 12,
The weight 35, the plate-shaped weight plates 41, by in portrait orientation on top predetermined number of the plate thickness direction are sequentially connected in the lateral direction by connecting means 42 made of rivets or bolts, weights weight and required weight impart length and lateral direction of the passage straight resistance, grounding unit 12 when the seat 2 descends is configured as strip-shaped weight body bendable vertically upon brought into contact with the lower portion of the irregularities, further the weight 35 The front row weight plate 41f and the rear row are formed by stacking a plurality of weight plates 41 in the vertical orientation in the plate thickness direction and in the left-right direction on the front row side and the rear row side of the belt-like weight body in plan view. A weight plate 41r is arranged, and between the front row weight plate 41f and the rear row weight plate 41r, a plurality of weight plates 41 are arranged in the plate thickness direction and in the left-right direction in the vertical posture on the middle row side of the belt-like weight body. Formed by overlapping the side parts Interposed column weight board 41n, is characterized in that superimposed in the front row, middle row, back row by inserting the coupling 42 to the drilled coupling hole 41b in the portion overlapping each other.

Second , the weight 35 is characterized in that a plurality of belt-like weight bodies having a predetermined division weight obtained by dividing a required weight weight are arranged in the plate thickness direction.

Third, the weights 35, constitutes a weight unit 37 by covering the tubular in wait cover 36 having a cushioning property, the movement in the lateral direction of the weight unit 37 in a cylindrical bag-like weight accommodating portion 38 It is characterized by being regulated and stored.

Fourth , in a state where the weight unit 37 is housed in the weight housing portion 38, both ends of the cylindrical weight cover 36 that covers the weight 35 are attached and fixed by a closing tool 46 that closes both ends of the weight housing portion 38. It is a feature.

In order to solve the above problems, a grounding portion structure of a sheet for a sheet shutter according to the present invention is as follows.
According to the first aspect of the present invention, the seat is smoothly opened and closed with a simple and inexpensive configuration by the grounding portion having the weight weight, the weight length, and the sheet straightness required for the seat shutter, and at the time of the seat lowering When the grounding part comes into contact with the contact body, a belt-like weight body formed by connecting a plurality of weight plates bends in the vertical direction to buffer the contact impact, so that contact trouble can be suppressed. .
In addition, the grounding part with a weight that allows bending in the vertical direction while maintaining the straightness in the front-rear direction suppresses the occurrence of local gaps with the floor surface due to the back-and-forth movement of the grounding part and damages the grounding part. It is possible to facilitate the emergency treatment without impairing the bending buffering ability at the time.

  According to the invention of claim 2, since the weight having a predetermined weight is formed into a belt-like weight body in which a weight plate made of a strip-shaped iron plate is provided on the grounding portion and stacked in a high density on the front row side, the middle row side, and the rear row side. It can be manufactured with improved straightness in the front-rear direction without impairing the vertical bending.

  According to the invention of claim 3, since the weight required for the ground contact portion for each sheet shutter having a different frontage can be arranged and configured simply by arranging a plurality of belt-like weight bodies in the plate thickness direction. In addition, the weight and length in weight production can be standardized while achieving simple and low cost production.

According to a fourth aspect of the present invention, a weight unit is formed by covering the weight with a weight cover having cushioning properties, and the movement of the weight unit in the left and right direction is restricted within the cylindrical bag-like weight storage portion. And store
The weight composed of a plurality of weight plates has a wide flat bottom surface on the weight grounding surface side of the belt-shaped weight body having a rectangular cross section, and a weight cover having a cushioning property between the wide bottom surface and the floor surface. Intervening and grounding, and because the belt-like weight body that restricts movement in the left-right direction bends and moves along the shape of the floor surface due to the up-and-down bending property, Airtightness can be increased.

According to the invention of claim 5, in a state where the weight unit is stored in the weight storage portion, both ends of the cylindrical weight cover that covers the weight are attached and fixed by a closing tool that closes both ends of the weight storage portion,
When closing the both ends of the weight storage portion, the closing device closes both ends of the weight cover in a vertically narrowed shape, and stably holds the weight in a vertically standing posture while restricting movement in the left-right direction. As a result, the weight unit has features such as extending the seat by weight weight and straightness, and improving airtightness between the grounding portion and the floor surface at the time of grounding.

It is a front view which shows a sheet shutter to which the present invention is applied and is partially broken. It is an enlarged side sectional view of a sheet shutter. It is a left front expanded front view which shows the structure of a seat case and a seat guide. It is sectional drawing which shows the structure of the sheet | seat guide containing a support | pillar. It is an enlarged plan sectional view showing the guide structure of the sheet. The grounding part structure which concerns on this invention is shown, (a) is a front view which partially fractures | ruptures and shows the structure of a grounding part, (b) is a plane sectional view which shows the principal part structure of the fracture | rupture part of (a) It is. The structure of the weight and weight unit in connection with 1st Embodiment of this invention is shown, (a) is a front view of a weight, (b) is a top view of (a), (c) is a structure of a weight unit. (D) is a side view showing the structure and assembly mode of the weight unit, and (e) is a side view showing the weight storage part and the grounding part structure. The grounding part structure provided with the weight structure in connection with 1st-4th embodiment in connection with this invention is shown, (a) is a side view which shows the weight structure of 1st Embodiment, (b) is the weight of 2nd Embodiment. The side view which shows a structure, (c) is a side view which shows the weight structure of 3rd Embodiment, (d) is a side view which shows the weight structure of 4th Embodiment. The grounding part structure in connection with 2nd Embodiment of this invention is shown, (a) is a front view which shows the structure of a grounding part partly fractured | ruptured, (b) is the principal part structure of the fracture | rupture part of (a) FIG.

  An embodiment of the present invention will be described with reference to the drawings. The seat shutter 1 is mainly installed at a doorway of a building, and supports a shutter seat 2, a column 3 (side frame) as a guide constituent member that supports the left and right sides of the shutter 2 and guides the up and down movement in the vertical direction, and an opening and closing mechanism for the seat 2. It is comprised by the seat case 4 etc. of the cylinder structure which interiors. The column 3 is fixed along the pillars and walls of the doorway, and the seat case 4 is installed sideways along the beam or wall of the building and assembled to the left and right columns 3.

In the illustrated example of the seat shutter 1, the seat case 4 is detachably attached via brackets 3 a fixed to the upper outer side of the support column 3 with both sides of the seat case 4 being placed on the left and right support columns 3.
The sheet 2 can be taken up and fed out by forward and reverse rotation of a seat drum (feeding device) 5 incorporated in the seat case 4, and the seat 2 is configured by left and right columns 3 on both sides. 11 is supported so as to be slidable up and down, and moves up and down to open and close the entrance / exit.

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 on both sides of a case body 6 having a cylindrical structure with a square cross section in a side view, and left and right end plates in the case chamber A cylindrical sheet drum 5 rotatably supported by 6a and 6b is accommodated in the drum axial direction. In addition, 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 has a cylindrical motor 7 mounted on the inner surface thereof in a horizontal posture so as to face the seat drum 5 and support it. The motor 7 is attached by fitting a driving body 8 formed of an uneven ring provided on the driving shaft 7 a to the inner surface of the seat drum 5 to rotate the seat drum 5 forward and backward.

The left end plate 6b is attached so as to close the left end portion of the case body 6, and rotatably supports 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 horizontally in the seat case 4, and moves forward and downward (advance) and retracts (retracts) as the motor 7 rotates forward and backward.
Further, the opening / closing operation of the seat 2 is performed in the normal and reverse directions 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 as in the conventional case. Performed by control.

  The sheet 2 is made of a rectangular curtain made of a synthetic resin material having flexibility, and the upper end is attached to the peripheral surface of the sheet drum 5 along the axial direction. The seat 2 is provided with a wire-like elastically deformable plastic material engaging projection 10 along both side edges of the curtain body, and a rail-like seat guide 11 configured on the inwardly facing surface side of each column 3. In addition, the engaging projection 10 is engaged with and accommodated so as to slide up and down. As a result, the seat 2 moves up and down while holding the seat tension in the lateral direction while preventing the sheet from coming off on both sides.

  Further, the lower end of the seat 2 is airtight to the ground or the floor surface (hereinafter referred to as the floor surface) in the closed state in which the seat 2 is lowered to maintain the straightness in the horizontal direction. The grounding portion 12 is also provided as a weight portion that urges the seat 2 to descend. The grounding portion 12 has a grounding portion structure according to the present invention, which will be described later, and urges and extends the seat 2 downward by the weight of the weight to ensure airtightness with the floor surface at the time of grounding. It is equipped with a buffer structure when it comes into contact with a contact body such as a person who passes sometimes, a vehicle, or an article existing in the frontage.

As shown in FIG. 4, the seat guide 11 is formed by fitting the open end side of the outer rail 14 having a U-shaped cross section to the inward groove-like open portion 13 of the column 3 having a rectangular C-shaped cross section in the left-right direction. It is composed. The outer rail 14 is positioned by fitting and fixing the end portions of the front and rear side walls along the column 3 so as to be detachable.
The outer rail 14 is attached between the front and rear side walls by fitting an inner rail 16 and a seat return guide 17 connected to the upper portion of the inner rail 16 so as to be detachable and slidable left and right. The outer rail 14, the inner rail 16, and the seat return guide 17 are made of a synthetic resin material having wear resistance and predetermined flexibility. A seat guide 11 is constituted by the outer rail 14, the inner rail 16, and the like.

  As shown in FIG. 4, the inner rail 16 has a rectangular cylindrical cross-section inner locking portion 22 accommodated on the inner side of the outer rail 14 in the plan view (right outer side from the seat 2 in FIG. 4), and the inner rail 16. It is integrally formed with an engagement guide 21 that is opened inwardly on the inner side (left inner side) of the locking portion 22 and inserts and locks the engagement protrusion 10 therein.

  A guide pin 26 whose outer end penetrates the inner locking portion 22 and the outer wall of the outer rail 14 is accommodated in the inner locking portion 22, and an inner engagement is achieved by a coil spring 28 sheathed on the guide pin 26. The stop 22 is always pressed outwardly and elastically in the outer rail 14.

  The pulling action of the spring 28 causes the seat 2 to be elastically pulled in the direction of extending to the left and right sides with the engaging projection 10 at the end thereof being accommodated and locked in the engaging guide 21, Is opened and closed while being slidably guided by the engagement guide 21 (sheet guide 11).

  For example, when a strong wind pressure is applied to the seat 2 or a forklift or the like abuts and an inward load is applied, the inner rail 16 is directed inwardly through the engaging protrusion 10 and the engaging guide 21 and against the spring 28. When it is pulled and a stronger force is applied, the inner open end of the engagement guide 21 is elastically opened, the engagement protrusion 10 is pulled out from the engagement guide 21, and the engagement between the two is released. The 16 side is protected so as not to be overloaded.

  Like the sheet 2 shown by the phantom line (two-dot chain line) in FIG. 2, the sheet 2 that has come off the engagement guide 21 is located at the lower end of the return guide 17 provided at the upper end of the sheet guide 11 by rewinding the sheet. While being guided by the reverse V-shaped return groove 31 in the downward direction and housed in the engagement guide 21 on the upper end side, when the grounding portion 12 rises to the set upper limit position and then descends again, the engagement protrusions 10 at both ends of the sheet 2 are The lower end thereof is returned and inserted again into the lower engagement guide 21 by the guide of the V-shaped return groove 31 with the return guide 17 facing upward, and returned to the normal lifting operation posture.

  Here, the seat return guide 17 will be described. The seat return guide 17 is inserted into and connected to the upper portion of the inner rail 16 in the outer rail 14 as shown in FIGS. As a result, the sheet return guide 17 performs the take-up guide and the feed-out guide for the sheet 2 and, as indicated by a dotted line in FIG. And let it go out in a proper posture.

  The sheet return guide 17 is formed of a synthetic resin material so as to have substantially the same flat cross-sectional shape as the inner rail 16. That is, the sheet return guide 17 includes an engagement guide 21 that accommodates the engagement protrusion 10, and an inner locking portion 22 that accommodates the spring 28 that urges the engagement protrusion 10 outward while being inserted into the mounting pin 26. Is forming.

  As described above, the sheet return guide 17 has an upside down V-shape and an upside-down V-shape with a vertical interval for introducing the disengaged sheet 2 in the middle of the engagement guide 21. A return groove 31 formed in a notch is provided.

  In addition, a sheet stopper piece 32 formed by extending the guide wall 23 inward is integrally provided on the upper portion of the guide body of the sheet return guide 17. The sheet stopper piece 32 can contact the stoppers 33 installed in the vicinity of both sides of the grounding portion 12 even when there is a malfunction in the winding of the sheet 2, so that the sheet stopper 2 can be lifted beyond the contact position of the sheet 2. It can regulate and prevent entrainment of the grounding part 12.

  Next, the guide structure of the shutter sheet end will be described with reference to FIGS. This sheet 2 has a plastic end member 2b which is elastically deformed in a belt shape (or belt shape) having a predetermined width and is joined to both ends of a main body portion 2a which is a curtain body portion by heat welding or adhesion. Installed.

  In this example, the front surface of the outer end portion of the sheet main body portion 2a and the back surface of the inner end portion of the end member 2b are overlapped and heat-pressed, and the end portion of the main body portion 2a is applied to the back surface side of the end member 2b at the time of pressure bonding. A gauge portion 2c is formed of a vertical ridge or protrusion that is positioned in contact with each other, so that the body portion 2a and the end member 2b can be accurately positioned during joining.

  Further, on the outer end portion of each end member 2b, an engaging projection 10 that is continuous in the form of a wire is formed integrally with the end member 2b. The engagement protrusion 10 is inserted from above or below into the hollow portion between the front and rear walls parallel to the left-right direction of the engagement guide 21 having a C-shaped cross section, and is bent into a hook shape in a direction facing each other on the open end side. The peripheral wall hook portion 21a is engaged.

  As shown in FIG. 5, the engagement protrusion 10 has a cross-sectionally symmetric cross section, a V-shaped groove-shaped recess 10a is formed at an intermediate position in the left-right direction, and the front and left and right are the same single. The convex part 10b which makes an arc-shaped chevron cross section with the same height as an arc is formed by sorting back and forth, and is formed into a four-leaf clover-shaped cross section in plan view.

  The apex of the convex portion 10b is elastically pressed against the parallel front and rear wall surfaces in the engagement guide 21 at two points on the left and right, and the engagement protrusion 10 moves left and right and slides up and down inside the engagement guide 21. It is housed freely.

  As described above, the engagement protrusion 10 is in contact with the front and rear inner surfaces of the engagement guide 21 by the two protrusions 10b at the front and rear thereof, so that the guide operation is performed even when the seat is raised and lowered as compared with the one having a circular cross section. Is stable, wear is reduced, noise is suppressed, and the open end of the engagement guide 21 is also applied when an oblique overload is applied in the direction of arrow a in FIG. There is an advantage that the hook portion 21a on the side is pushed and opened without difficulty in the direction of the arrow b, and the engagement protrusion 10 is released.

  In addition, in order to improve the sliding of the engaging protrusion 10 in the engaging guide 21 during the up-and-down slide and the left-right vibration, when supplying a lubricant such as grease or oil into the engaging guide 21, The V-shaped groove-shaped concave portion 10a on the outer periphery of the cross section becomes an oil reservoir, and there is an advantage that the lubrication of the movement of the engagement protrusion 10 with respect to the engagement guide 21 can be maintained for a long period.

  Next, the details of the grounding portion structure of the grounding portion 12 will be described with reference to FIGS. As shown in FIG. 6, the grounding portion 12 of the seat 2 folds back a weight storing piece 2 f formed by integrally extending the lower end side of the main body portion 2 a that is a curtain body portion at a midway portion. A weight unit 37 consisting of a weight 35 and a weight cover 36, which will be described later, is attached to the joining position 2s of the main body 2a by a heat compression means or the like so that a bag-like or tube-like weight can be accommodated from the side. A storage portion 38 is formed. Further, the outer periphery of the weight storage portion 38 is covered from below by a protective cover 39 having wear resistance, and both ends thereof are adhered to the joining position 2s.

  The weight unit 37 will be described with reference to FIGS. The weight 35 of the weight unit 37 has a predetermined number of plate-shaped weight plates 41 formed of iron plates in the shape of strips in a plate-thickness direction (front-rear direction) in a vertical position via a coupling tool 42 such as a rivet, bolt or mounting pin. ) In order to maintain the required weight weight and the straightness in the left-right direction by sequentially overlapping the left and right end sides and connecting them in a chain, and when contacting the unevenness of the contact body The belt-like weight body that can be bent in the vertical direction is formed into a predetermined length that can be housed in a weight housing portion 38 having a frontage width.

  The weight 35 has a large overlapping margin between adjacent weight plates 41 so that the rigidity for restricting the bending in the front-rear direction and the straightness with less bending in the front-rear direction are maintained, while maintaining the vertical direction. A one-way bending structure that allows the bending of the film to be free. With this one-way bending structure and weight cover structure, it is possible to manufacture a grounding portion structure having a buffering action at substantially the full width of the frontage with a simple and inexpensive configuration.

  That is, the weight 35 according to the embodiment has a strip shape in which each weight plate 41 has a length of 45 mm, a length of 195 mm, and a plate thickness of about 1.5 mm, and avoids corner contact at the four corners when bent. An arc portion 41a is provided. Each weight plate 41 has a simple shape in which two connection holes 41b having a diameter of about 5 mm are formed at a central position in the vertical and horizontal directions with a connection interval of about 100 mm. As a result, the weight plate 41 does not use a commercially available standard iron plate, and uses the scraps that are routinely generated at processing sites such as cutting and pressing without wasting them, and simply punches them. It can be manufactured simply and inexpensively. Note that the weight plate 41 can be manufactured with a weight 35 having a predetermined weight by adjusting the number of stacked sheets with an end material having an arbitrary thickness. Further, when the connecting tool 42 is a riveting method, the weight 35 can be manufactured efficiently and at low cost.

  The weight 35 to be inserted into the weight storage portion 38 shown in FIG. 6 is, for example, the seat 2 of the 900 mm type seat shutter 1 having a frontage of about 695 mm. The number of weight plates 41 in the longitudinal direction required for connection is six, and they are connected in an overlapping manner with a connection interval of about 100 mm. As shown in FIGS. 6 and 7, each adjacent weight plate 41 connected by inserting a connection tool (rivet) 42 into the connection hole 41b is connected to the inner weight plate (inside of the plate thickness direction). The outer left and right outer weight plates (front row weight plates) 41 connected by the connecting tool 42 are connected as close to each other as possible.

  As a result, the adjacent weight plates 41 are sufficiently overlapped to ensure a large area and are connected, so that the number of weight plates 41 per weight length can be increased, and the grounding portion 12 required for the seat 2 can be increased. The weight weight can be increased efficiently. Further, the weight 35 for manufacturing the strip-shaped weight plate 41 with a connection interval of about 100 mm has a sufficient overlapping area to minimize the bending deformation in the front-rear direction, and thus has a vertical bending property. It is possible to configure the grounding portion 12 that is excellent in straightness with little bending in the front-rear direction while increasing.

  Furthermore, the weight plate 41 connected as described above has a front end with a combination as shown in FIGS. 6B, 7B, 7D, 8E, 8A to 8D. The weight length and weight of the sheet 2 required for the different sheet shutters 1 can be easily and inexpensively produced while standardizing the weight production. Further, the maintenance work of the grounding portion 12 performed by the user side is facilitated for the sheet shutter 1 shipped from the production factory and installed locally.

  For example, the weight weight required for the sheet 2 for the standard type sheet shutter 1 having a frontage of about 900 mm is about 6 kg, and a predetermined number of weight plates 41 so that the weight is about 3 kg, which is half that weight. A single weight 35 made of a strip-like weight body that is connected in a stacked manner in the length and thickness direction (front-rear direction), and two single weights 35 (line) are assembled side by side so that a predetermined 6 kg weight is obtained. I have to.

  As shown in FIGS. 6, 7, and 8A, the structure of the single weight 35 includes a front row weight plate 41f and a rear row weight plate 41r in which two weight plates 41 are vertically stacked in the thickness direction. With a middle row weight plate 41n formed by stacking four weight plates 41 between them, the connecting tools (rivets) 42 are inserted through the overlapping connection holes 41b in a state of being stacked in the front-rear direction. The eight weight plates 41 are overlapped in the front-rear direction and connected and fastened in the weight length direction to form a front, middle, and rear row belt weight body.

  Next, the two weights 35 configured as a single unit are covered with the weight cover 36 in a state where the weights 35 are arranged in the same direction or in the opposite direction, and the weight is a standard weight having a predetermined weight of about 6 kg. The unit 37 is configured. Accordingly, the single weight 35 having a divided weight (for example, about 3 kg) obtained by dividing the required weight (about 6 kg) into a plurality of parts (for example, divided into two) as described above is the number of cases in which the number of stacked assembly of weight plates 41 is not divided. It can be set to 1. Further, the rivet insertion work and the fastening work can be easily and easily performed, and there are advantages that the production efficiency is improved and the assembly into the weight cover 36 and the handleability of the weight unit 37 are improved as a lightweight single weight part.

  Next, the weight cover 36 and the weight unit 37 will be described with reference to FIGS. The weight cover 36 has a cushion member 36a made of a sponge sheet or the like having a length and a width so as to wrap the two weights 35 from below, and an adhesive is applied to the cushion member 36a. It is comprised by the outer skin member 36c etc. which consist of a vinyl film body etc. which are formed having the surface part (adhesion allowance) 36b.

  Thus, when the weight cover 36 covers the two single weights 35 as shown in FIG. 7D so as to wrap from below, the weight cover 36 is pressed against the outer skin member 36c as indicated by the arrows. The weight 35 can be fixed in a stable posture and the weight unit 37 can be manufactured efficiently and easily.

  Next, the weight unit 37 configured as described above can be sequentially inserted from the left and right sides into the weight storage portion 38 formed by the weight storage piece 2f in the lower portion of the seat 2, and the right and left weight positioning structure Therefore, the positioning and holding can be performed promptly and reliably at an appropriate position. Further, various specification changes and maintenance operations that are appropriately performed by the user at the site can be easily performed on the grounding portion 12 of the existing seat shutter 1 through the structure of the weight unit 37.

  That is, the grounding portion structure for this purpose regulates the length of the weight cover 36 that wraps the weight 35 in a cylindrical shape with flexibility and cushioning, and restricts the movement of the weight 35 in the left-right direction to the left and right of the weight length. A movement restriction unit 36e having a movement restriction allowance X is provided. Further, the weight storage portion 38 is configured such that both ends of the bag portion opened in a state in which the weight unit 37 is stored can be opened and closed by a closing tool 46, respectively. (Fig. 6)

  The closing tool 46 includes a long closing piece 46a that is vertically contacted along the front and rear edges of the bag-like both ends of the weight storage portion 38, a bolt hole formed in the front and rear closing pieces 46a, and the weight storage portion 38. It comprises a bolt 46b that can be inserted into upper and lower mounting holes that are drilled at both ends, a nut 46c, and the like. As a result, as shown in FIG. 6B, the closing tool 46 makes the front and rear closing pieces 46a come into contact with the front and rear of the protective cover 39 at both ends of the weight storage portion 38 in which the weight unit 37 is stored. Is inserted in the front-rear direction to tighten the nut 46c.

  Thereby, the weight storage part 38 closes the left and right ends in the vertical direction by the closing tool 46 to prevent the insects from entering the inside. At this time, the closing device 46 is closed in a state where both ends of the weight storage portion 38 are vertically narrowed, and the movement restricting portion 36e of the weight cover 36 is narrowed so that the vertical weight plates 41 at both ends of the weight 35 are held in a sandwiched manner. I support this. For this reason, the weight 35 is held in a vertical standing posture in the weight storage portion 38 and is also brought into contact with the left and right ends of the narrow weight cover 36 to restrict movement in the left-right direction. Further, the movement restricting portion 36e of the weight cover 36 prevents the direct contact between the end portions of the weight plate 41 positioned at the left and right ends of the weight 35 and the weight storage piece 2f of the seat 2, so that the durability of the grounding portion 12 is improved. There is a feature such as improving.

  In the grounding portion structure, the weight 35 that becomes a belt-like weight body has a rectangular cross section by the plurality of weight plates 41 connected in the plate thickness direction, and the bottom surface on the weight grounding surface side becomes a wide flat bottom surface. As a result, the grounding portion 12 is provided with a cushioned weight cover 36 between the flat and wide bottom surface and the floor surface of the belt-like weight body at the time of grounding, and the vertical direction of the belt-like weight body. Because it bends and moves along the shape of the floor due to its flexibility, it effectively buffers loads such as the weight of the grounding part and the descent inertia when descending, and smoothly and quietly grounds, and the durability of the grounding part 12 Can be increased.

  Further, the bottom surface of the weight 35 makes a flat contact with a wide contact area on the floor surface while the protective cover 39 is pushed and spread through the weight cover 36 and the weight storage portion 38, so that a highly airtight grounding is achieved. It can be performed stably. Furthermore, the belt-like weight 35 that can be formed into a square cross section when viewed from the side has a weight cover 36 having a cushioning property that has a vertically elliptical cylindrical shape due to a vertical pulling force, and has four corners of the square cross section. The posture is held in a state where the corner portions of the corners are elastically in contact with the inner surface of the weight cover 36 at four points.

  As a result, when the grounding portion 12 receives a strong impact load from the top, bottom, front and back, or obliquely during the opening and closing operation of the seat 2, the weight 35 effectively applies the impact load by the elastic support structure in the weight cover 36. Smooth the vertical bending motion while buffering. Further, when the grounding portion 12 that is in contact with the ground is about to sway in the front-rear direction due to wind or the like, the large weight in the front-rear direction of the seat 2 is suppressed by an appropriate weight weight and straightness, and a grounding gap (local gap) Etc.) and the sliding movement of the protective cover 39 with respect to the floor surface is suppressed and reduced by the cushioning property of the weight cover 36, so that wear due to ground sliding can be reduced.

  If the weight 35 is to be more securely fixed in the weight storage portion 38, the weight unit 37 is integrated into the weight storage portion 38 by using the connection holes 41 b of the weight plates 41 located at both ends of the weight 35. Positioning and fixing can be easily performed. At this time, when the insertion hole is formed in the weight cover 36 from the connection hole 41b and the protective cover 39 facing the connection hole 41b, and the connection member such as a bolt or a string is inserted in series, tightening is performed via these. Positioning and fixing can be ensured.

  According to this fixing means, the user can easily perform maintenance work on the ground contact portion 12 of the existing seat shutter 1 at various sites by a retrofitting operation, and the weight cover 36 and the weight storage portion 38 A slight positional shift and rattling of the weight 35 can be eliminated. Further, since the weight 35 is fixed to the weight storage portion 38 together with various covers via the connecting member and the weight cover 36 at both ends thereof, the bending in the front-rear direction is further reduced, and the grounding portion 12 at the time of grounding is reduced. As a result of improving the straightness in the front-rear direction, the occurrence of the local gap can be further suppressed.

  Next, a usage mode, an operation, and the like of the sheet shutter 1 including the grounding unit 12 configured as described above will be described. The seat shutter 1 is operated by forward / reverse rotation control of the motor 7 based on a manual operation command of an operation switch 9a installed on the control panel 9 and a detection command of a detection unit 9b that detects a passing body. Do. At this time, the seat 2 accommodates the left and right seat guides 11 by engaging the engaging protrusions 10 so as to be slidable up and down. The front door opens and closes smoothly because it moves up and down with its weight and straightness.

  On the other hand, when the seat 2 is opened and closed, the grounding portion 12 receives vibrations when the seat 2 is moved up and down at a high speed, when the seat 2 is raised and stopped, when the seat 2 is lowered, and when the seat 2 comes into contact with the floor. Further, when the seat is further detached, the weight 35 is moved in the left-right direction or tilted in the front-rear direction in the weight storage portion 38.

  On the other hand, the grounding portion 12 is a belt-like weight body in which a weight plate 41 formed of a strip-shaped iron plate is connected in a longitudinal orientation by a predetermined number of rivets or the like in a longitudinal direction and a plate thickness direction. The belt-like weight body is covered with a weight cover 36, has weight weight, weight length, and seat straightness, and bends in the vertical direction when the grounding portion 12 comes into contact with the contact body when the seat 2 is lowered. It has a buffer structure. Therefore, when the grounding portion 12 contacts the floor surface, the weight is prevented from bending in the front-rear direction, and the air tightness with the floor surface is ensured through the weight cover 36 and the weight storage portion 38, and a local gap is generated. Also prevent. Further, there is an advantage that the weight 35 of the sheet shutter sheet that can be bent in one direction can be efficiently manufactured with a simple and inexpensive configuration.

  On the other hand, the seat shutter 1 having this grounding portion structure has a protective cover 39 in which the grounding portion 12 is used for a long period of time by, for example, sliding contact with the floor surface due to wind pressure fluctuations or contact with sharp objects. Then, the weight storage piece 2f is worn out and the weight storage portion 38 is further worn out, so that the weight 35 is exposed through the hole that has been worn out, but does not fall. Since the granule is not scattered on the floor surface from the tearing point like the conventional grounding portion with the granule bag weight, provisional first aid is generally used even if the spare sheet 2 for replacement is not prepared in advance. It is possible to quickly carry out by means of a simple application means and binding means, and it is possible to continue production without stopping the factory for food and medicine.

  Next, various embodiments of the grounding portion structure and the weight unit 37 will be described with reference to FIGS. In addition, about the structure and effect | action similar to the thing of the said embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. Each numerical value shown is a reference value. First, FIG. 8 shows a side view of the grounding portion 12 provided on the sheet 2 provided in various sheet shutters 1 having different widths.

  FIG. 8A shows a weight structure of the weight unit 37 related to the ground contact portion structure of the first embodiment. For example, the weight structure is 2000 mm, the weight is 7.5 kg, the ground contact thickness is 32 mm. It consists of a front row weight plate 41f and a rear row weight plate 41r which are stacked in two plates, and a middle row weight plate 41n which is interposed between the two plates by overlapping four weight plates. The belt-like weight body according to this embodiment shows an example in which one body is arranged as the standard single weight 35 having a standard number of stacked weight plates 41 in which eight weight plates 41 are stacked in the thickness direction.

  FIG. 6B shows a weight structure according to the second embodiment, which has, for example, a frontage weight plate 41f and a rear row weight plate each having a weight of 3000 mm, a weight of 9 kg, and a grounding portion thickness of 28 mm. 41r and a middle row weight plate 41n interposed between the two weight plates. The belt-like weight body according to this embodiment shows an example in which one body is arranged according to the above-described form as a half-type single weight 35 of the standard number of stacked sheets in which four weight plates 41 are stacked in the thickness direction.

  FIG. 5C shows a weight structure according to the third embodiment. For example, the frontage is 1500 mm, the weight is 8 kg, and the contact portion thickness is 40 mm. The belt-like weight body formed thereby has a weight plate 41 in the plate thickness direction. 2 shows an example in which two standard single weights 35 are stacked, and the half type single weight 35 is arranged.

  FIG. 4D shows a weight structure according to the third embodiment. For example, the frontage is 900 mm, the weight is 5 kg, and the grounding part thickness is 48 mm. The belt-like weight body is a weight plate 41 in the plate thickness direction. An example in which two standard single weights 35 in which eight pieces are stacked are arranged.

  As described above, the weight of the grounding portion 12 required for each sheet shutter 1 having a different frontage is configured by arranging a plurality of belt-like weight bodies having a predetermined divided weight obtained by dividing the required weight weight into a plurality of pieces in the plate thickness direction. Thus, a plurality of belt-like weight bodies can be easily provided on the grounding portion 12 simply by arranging them in a selected combination, and can be produced easily and at a low cost while standardizing the weight and length in weight production. it can.

  That is, it is easy to prepare a plurality of single weights necessary for the form of each sheet shutter 1, for example, with eight overlapping sheets as standard single weights 35 and four overlapping sheets as 1/2 type single weights 35. Therefore, it is possible to easily select various combinations and arrangements of the both, and it is possible to achieve production efficiency and cost reduction.

  Further, since the weight plates 41 can be easily stacked in the vertical direction and added in the front-rear direction, the weight of the weight 35 can be increased without disturbing the cushioning property of the weight 35 in the bending direction. Further, for example, when the number of weight plates 41 is increased as shown in FIG. 8 (d), the ground contact width (front / rear ground contact length) Y in the front-rear direction can be easily increased, and the airtightness and direct connection are improved. The sex can be increased.

  In the weight structure of the above-described example, when it is desired to obtain the front and rear contact length Y without greatly changing the weight, the weight storage portion 38 has flexibility at the lower portion, side portion, or intermediate portion of the weight 35. By interposing a spacer having an arbitrary shape inside, the front-rear grounding length Y of the grounding portion 12 can be easily increased, and the grounding airtightness can be arbitrarily improved. Further, the weight plate 41 can be a plate member having a small specific gravity made of plastic material, and can easily increase the ground contact length Y without making the weight 35 too heavy, thereby improving the ground tightness and various belt shapes. A weight body can be produced.

  Next, another embodiment of the weight unit 37 will be described with reference to FIG. In addition, about the structure and effect | action similar to the thing of the said embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. This grounding portion structure constitutes a weight unit 37 in which a weight 35 similar to that shown in FIG. 6 is covered with a weight cover 36 having a cushioning property having a substantially frontage width, and the weight cover of the weight unit 37 is formed. The weight 35 and the weight cover 36 are stored in the cylindrical bag-shaped weight storage portion 38 by restricting the movement in the left-right direction by attaching and fixing the both ends of the weight 36 with a closing member 46 that closes both ends of the weight storage portion 38. I have to.

  In other words, when the both ends of the weight storage portion 38 are closed, the closing device 46 closes both ends of the weight cover 36 in a vertically narrowed shape, and stably holds the weight in a vertical standing posture while restricting movement in the left-right direction. It can hold | maintain and can improve the straightness more by making the bending | flexion of the front-back direction of a strip | belt-shaped weight body small. The seat 2 is extended by the weight of weight and straightness, and the grounding portion 12 and the floor surface at the time of grounding are reliably grounded with high airtightness.

  On the other hand, when the ground shutter 12 is damaged as described above, the seat shutter 1 having the ground structure has a weight storage portion when the emergency treatment is performed by a general application means or a binding means. Since the cords are passed from the lower side to the upper side of the weight cover 36 supported on the left and right sides, the grounding can be performed without impairing the airtightness and the shock-absorbing property even after the emergency treatment. . Therefore, the ground contact portion structure of the seat for the sheet shutter has an advantage that it can be suitably used for foods, medicines, chemical factories and the like.

DESCRIPTION OF SYMBOLS 1 Sheet shutter 2 Sheet | seat 2a Sheet | seat main body 2b End member 3 Support | pillar 11 Sheet guide 12 Grounding part 35 Weight 36 Weight cover 37 Weight unit 38 Weight storage part 41 Weight plate 41b Connection hole 41f Front row weight plate 41n Middle row weight plate 41r Rear row weight plate 42 connector 46 closure

Claims (4)

The weight (35) is stored along the weight storage portion (38) in the left-right direction at the lower end of the seat (2) that supports both ends of the left and right seat guides (11) and guides the lifting operation. In the sheet shutter sheet grounding portion structure provided with a grounding portion (12) for extending and grounding, the weight (35) includes a predetermined number of plate-shaped weight plates (41) in the plate thickness direction in a vertical posture. by sequentially connecting the right and left directions by superimposing consisting rivets or bolts coupling (42), to grant the weight by weight and the weight length and lateral direction of the passage straight resistance required at the time of descent of the sheet (2) grounding portion (12) is configured as strip-shaped weight body bendable vertically upon brought into contact with the bottom of the irregularity, further the weight (35) is, on the front row side and rear side of the strip weight body in a plan view A front row weight plate (41f) and a rear row weight plate (41r), which are formed by stacking a plurality of weight plates (41) in the vertical orientation in the thickness direction and in the left-right direction, are arranged in the front row. Between the weight plate (41f) and the rear row weight plate (41r), a plurality of weight plates (41) are arranged on the middle row side of the belt-like weight body in the plate-thickness direction and in the left-right direction between the end sides. Are inserted in the middle row weight plate (41n), and the coupling tool (42b) is inserted into the coupling hole (41b) drilled in the overlapping portion so as to be overlapped in the front row, middle row, and rear row. A grounding portion structure of the sheet for the sheet shutter. The sheet shutter sheet grounding portion structure according to claim 1 , wherein the weight (35) is configured by arranging a plurality of belt-like weight bodies having a predetermined divided weight obtained by dividing a required weight weight in a plate thickness direction. The weight (35) is covered with a cushion-covered weight cover (36) to form a weight unit (37), and the weight unit (37) is placed in a cylindrical bag-like weight storage portion (38). The seat shutter seat grounding portion structure according to claim 1 , wherein the seat shutter is accommodated by restricting movement in a left-right direction. In a state where the weight unit (37) is stored in the weight storage portion (38), both ends of the cylindrical weight cover (36) covering the weight (35) are closed, and a closing tool for closing both ends of the weight storage portion (38) ( 46. The grounding portion structure for a sheet for a sheet shutter according to claim 3 , wherein the sheet shutter is fixedly attached by 46).

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