Screen device

Abstract

To obtain a screen device improved in operability by smoothing the rotation of a winding roller and improved in maintainability by facilitating the attachment / detachment of a screen winding unit to / from a winding box.SOLUTION: A screen device is configured in such a manner of providing a first bracket 11 and a second bracket 12 at one end and the other end in the longitudinal direction of a winding box 6 arranged at one end of a building opening, providing a bearing receiver 24 and a bearing presser 25 in each bracket 11, 12, and attaching 13 to both ends of a winding roller 4 in a screen winding unit 2, sandwiching the bearings 13 between bearing receiver 24 and a bearing presser 25 in the brackets 11, 12 for supporting the winding roller 4 inside the winding box 6 in a rotational and removal manner.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a screen device attached to a building opening and used for purposes such as shading, heat insulation, or insect prevention.

Background Art

[0002] A screen device attached to a building opening and used for purposes such as shading, heat insulation, or insect prevention is known, for example, as shown in Patent Document 1. This type of screen device rotatably attaches a winding roller inside a winding box arranged at one end of a building opening, and opens and closes the building opening with the screen by feeding out the screen wound around this winding roller from the winding roller or winding it back onto the winding roller. A coil spring is built into the winding roller, and when the winding roller rotates when feeding out the screen, the coil spring is twisted to accumulate elastic force, and the accumulated elastic force reversely rotates the winding roller to automatically wind up the screen. In addition, the winding roller is rotatably supported by brackets provided at both ends in the length direction of the winding box. However, since the support structure is usually a sliding bearing structure by fitting a bearing hole provided in one of the winding roller and the bracket and a rotating shaft, when the winding roller rotates as the screen is fed out and wound up, rattling occurs due to the gap between the bearing hole and the rotating shaft, generating noise, or it is difficult to perform smooth operation due to an increase in rotational resistance caused by the rattling. Also, since the winding roller is difficult to remove from the winding box during maintenance, there are difficulties in terms of maintainability.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

[0004] The technical problem of the present invention is to provide a screen device that improves operability when opening and closing the screen by making the rotation of the winding roller smoother, and improves maintainability by making it easy to attach and detach the screen winding unit to the winding box. [Means for solving the problem]

[0005] To solve the aforementioned problems, the screen device of the present invention comprises a winding box disposed at one end of a building opening and a screen winding unit detachably mounted inside the winding box, the screen winding unit comprises a screen for opening and closing the building opening and a winding roller for winding up and unwinding the screen, bearings as rolling bearings are attached to one end and the other end of the winding roller in the axial direction, a first bracket provided at one end and a second bracket provided at the other end in the longitudinal direction of the winding box are provided with a bearing receiver and a bearing retainer detachably attached to the bearing receiver, the bearing at one end of the winding roller is sandwiched between the bearing receiver and the bearing retainer of the first bracket of the winding box, and the bearing at the other end of the winding roller is sandwiched between the bearing receiver and the bearing retainer of the second bracket of the winding box, thereby the winding roller is rotatably and detachably supported inside the winding box.

[0006] In the present invention, the bearing comprises a concentrically arranged annular inner ring and outer ring, and rolling elements interposed between the inner ring and the outer ring. The bearing is attached to both ends of the winding roller by press-fitting the roller shafts of one end and the other end of the winding roller into the interior of the inner ring, and it is preferable that the outer ring is sandwiched between the bearing receiver and the bearing retainer.

[0007] Furthermore, in the present invention, it is preferable that the bearing receiver and the bearing retainer each have a semicircular contact surface that contacts the outer circumferential surface of the outer ring of the bearing, the bearing receiver is attached to the mutually facing inner surfaces of the first bracket and the second bracket of the winding box, and the bearing retainer is detachably attached to the bearing receiver.

[0008] The bearing holder is made of a semicircular member and has mounting surfaces at both ends for attaching the bearing retainer, with screw holes formed in the mounting surfaces. The bearing retainer has a semicircular main body and mounting parts that are perpendicular to both ends of the main body, with screw insertion holes formed in the mounting parts. The bearing retainer may be attached to the bearing holder by screwing mounting screws inserted through the screw insertion holes into the screw holes of the bearing holder.

[0009] Preferably in the present invention, the bearing receivers and bearing retainers attached to the first bracket and the second bracket have the same configuration and can be attached to either the first bracket or the second bracket. [Effects of the Invention]

[0010] In the screen device of the present invention, the winding roller is rotatably supported in the winding box via a bearing, so that the rotation of the winding roller when opening and closing the screen is very smooth, and problems such as rattling and noise that occur in conventional screen devices using sliding bearings are avoided. Furthermore, by separating the bearing retainer from the bearing holder and removing the bearing 13, the screen winding unit including the winding roller can be easily removed from the winding box, so that the screen, winding roller, etc. can be easily replaced if they are damaged, and the device is easy to maintain. [Brief explanation of the drawing]

[0011] [Figure 1]This is a front view showing a first embodiment of the screen device according to the present invention. [Figure 2] Figure 1 is an enlarged perspective view of the main part. [Figure 3] Figure 2 is an exploded view. [Figure 4] This is a perspective view of the bottom of the winding box. [Figure 5] This is a plan view of the bearing. [Figure 6] This is a front view showing a second embodiment of the screen device according to the present invention. [Figure 7] Figure 7 is an enlarged perspective view of the main part. [Figure 8] Figure 7 is an exploded view. [Figure 9] This is a schematic diagram illustrating the operation of a coil spring, showing the winding roller and wire drum separated, with the screen in the fully open position. [Figure 10] This is a schematic diagram of the screen in a partially open state. [Figure 11] This is a schematic diagram showing the screen in a fully closed state. [Modes for carrying out the invention]

[0012] Figures 1-4 show a first embodiment of the screen device according to the present invention. The screen device 1A of this first embodiment is a horizontally opening type screen device that opens and closes a building opening by moving the screen 3 horizontally. As shown in Figures 1 and 2, a screen winding unit 2 configured to wind up the screen 3 with a winding roller 4 is detachably attached to a rectangular screen frame 5 attached to the building opening.

[0013] In the present invention, winding the screen 3 around the winding roller 4 to open the building opening is referred to as "opening the screen", and feeding out the screen 3 from the winding roller 4 to close the building opening is referred to as "closing the screen" or "shutting the screen". Therefore, "opening and closing the screen 3" means "opening and closing the building opening with the screen".

[0014] The screen frame 5 includes a winding box 6 vertically arranged on one end side in the left-right direction of the building opening, an upper horizontal frame rod 7 and a lower horizontal frame rod 8 respectively extending horizontally along the upper side and the lower side of the building opening from the upper end and the lower end of the winding box 6, and a vertical frame rod 9 vertically arranged on the other end side in the left-right direction of the building opening.

[0015] The screen winding unit 2 includes the screen 3 and the winding roller 4, and a coil spring 10 built in the winding roller 4 and transmitting the elastic force accumulated by twisting as the rotational force when the winding roller 4 winds the screen 3. One end (upper end) in the axial direction of the winding roller 4 is supported by a first bracket 11 provided at one end (upper end) in the longitudinal direction (vertical direction) of the winding box 6 through a bearing 13 so as to be rotatable forward and backward, and the other end (lower end) in the axial direction of the winding roller 4 is supported by a second bracket 12 provided at the other end (lower end) in the longitudinal direction of the winding box 6 through a bearing 13 so as to be rotatable forward and backward.

[0016] A movable bar 14 for opening and closing operations is connected to the tip of the screen 3. The upper and lower ends of the movable bar 14 are fitted into guide grooves formed in the upper horizontal frame rod 7 and the lower horizontal frame rod 8, and are guided by the upper horizontal frame rod 7 and the lower horizontal frame rod 8 during the opening and closing operations of the screen 3.

[0017] In addition, the upper and lower ends of the screen 3 are fitted into the slits of inner rails (not shown) respectively housed in the upper horizontal frame bar 7 and the lower horizontal frame bar 8, and are adapted to move along these slits when opening and closing. Locking members 19 are attached to the upper and lower ends of the screen 3, and these locking members 19 are locked to the inner edges of the slits. Thereby, even when wind pressure or the like acts on the screen 3 when the screen 3 is closed, the screen 3 is prevented from bending and the upper and lower ends from coming off the upper horizontal frame bar 7 and the lower horizontal frame bar 8.

[0018] As the locking member 19, for example, one of a pair of engaging teeth of a slide fastener can be used. Similar engaging teeth are also used for connecting the screen 3 and the movable rail 14. The tip of the screen 3 is inserted into a slit formed vertically in the movable rail 14, and the locking member 19 composed of the engaging teeth attached to the tip is locked to the inner edge of the slit, whereby the screen 3 and the movable rail 14 are connected.

[0019] As is apparent from FIG. 3, the winding roller 4 has a cylindrical roller body 4a around which the screen 3 is wound, a columnar first roller shaft 4b coaxially connected to the upper end of the roller body 4a, and a cylindrical second roller shaft 4c coaxially connected to the lower end of the roller body 4a. The outer diameters of the first roller shaft 4b and the second roller shaft 4c are smaller than the outer diameter of the roller body 4a.

[0020] Inside the winding roller 4, a round bar-shaped spring shaft 21 is coaxially housed in the lower half thereof so as to be rotatable relative to the winding roller 4, and the coil spring 10 is housed so as to surround the spring shaft 21. One end (lower end) of the coil spring 10 is locked to the spring shaft 21, and the other end (upper end) of the coil spring 10 is locked to the inner surface of the roller body 4a of the winding roller 4 via a spring receiver 22.

[0021] The lower end portion 21a of the spring shaft 21 has a rectangular cross-sectional shape and protrudes downward from the lower end portion of the second roller shaft 4c of the winding roller 4. As shown in Figure 4, it engages with the square hole 23a of the bearing member 23 provided on the second bracket 12 at the lower end of the winding box 6. This prevents the spring shaft 21 from rotating with the winding roller 4 when the screen 3 is opened and closed. As a result, when the screen 3 is unwound from the winding roller 4 and closed, the winding roller 4 rotates relative to the spring shaft 21, causing the coil spring 10 to twist and accumulating biasing force. This biasing force acts on the winding roller 4 in the winding direction of the screen 3, so that when the screen 3 is opened, the screen 3 is automatically wound onto the winding roller 4.

[0022] The second bracket 12 is provided with an adjuster 28 that can be rotated from both the upper and lower sides of the second bracket 12 using a tool such as a screwdriver. When the adjuster 28 is rotated, the bearing member 23 rotates via a gear (not shown) provided on the second bracket 12, causing the spring shaft 2 to rotate and adjusting the number of turns of the coil spring 10.

[0023] As shown in Figure 5, the bearing 13 consists of a concentrically arranged annular inner ring 13a and outer ring 13b, and a plurality of rolling elements 13c, each consisting of balls or rollers, interposed between the inner ring 13a and the outer ring 13b. The bearings 13 are attached to both the upper and lower ends of the winding roller 4 by press-fitting the ends of the first roller shaft 4b and the second roller shaft 4c of the winding roller 4 into the interior of the inner ring 13a. The outer ring 13b of the bearing 13 is sandwiched between a bearing receiver 24, which is attached to the first bracket 11 and the second bracket 12 of the winding box 6 with mounting screws 27, and a bearing retainer 25, which is detachably attached to the bearing receiver 24 with mounting screws 26. In this way, the winding roller 4 is supported so as to be rotatable and detachable inside the winding box 6.

[0024] As shown in Figure 4, the bearing holder 24 is made of a semicircular member and has a semicircular contact surface 24a that the outer circumferential surface of the outer ring 13b of the bearing 13 abuts against. It is fixed to the mutually opposing inner surfaces of the first bracket 11 at the upper end and the second bracket 12 at the lower end of the winding box 6 by the mounting screws 27. Screw holes 24c are formed in the mounting surfaces 24b at both ends of the bearing holder 24 for screwing in mounting screws 26 for attaching the bearing retainer 25.

[0025] On the other hand, the bearing retainer 25 has a semicircular main body portion 25a having a semicircular contact surface 25b that the outer circumferential surface of the outer ring 13b of the bearing 13 abuts against, and mounting portions 25c formed at both ends of the main body portion 25a, with screw insertion holes 25d formed in the mounting portions 25c. With the outer ring 13b of the bearing 13 sandwiched between the bearing retainer 25 and the bearing receiver 24, the bearing retainer 25 is detachably attached to the bearing receiver 24 by screwing mounting screws 26 inserted through the screw insertion holes 25d into the screw holes 24c formed in the mounting surfaces 24b at both ends of the bearing receiver 24. As shown in Figure 3, by removing the mounting screws 26 and separating the bearing retainer 25 from the bearing receiver 24, the winding roller 4, i.e., the screen winding unit 2, can be removed from the winding box 6 together with the bearing 13. In this case, the screen 3 can be removed from the winding box 6 together with the winding roller 4 by separating its tip from the movable strut 14, then sliding it within the upper and lower horizontal frame rods 7 and 8 and pulling it out from the ends of the horizontal frame rods 7 and 8. However, it is also possible to remove the screen 3 together with the screen frame 5 without removing the movable strut 14 from the screen 3. When attaching the winding roller 4 and screen 3 to the winding box 6, simply reverse the procedure used for removal.

[0026] Furthermore, a cover that can be opened and closed or separated by a hinge is attached to the front of the winding box 6. Normally, the front of the winding box 6 is covered by this cover, and the cover is configured to be opened during maintenance or when attaching or detaching the screen winding unit 2, but the illustration of this cover is omitted.

[0027] In the screen device 1A of the first embodiment, when the screen 3 is unwound from the winding roller 4 and moved from a fully open state, where it is completely wound onto the winding roller 4, to a fully closed position, the coil spring 10 is twisted, and a biasing force is accumulated. When the screen 3 is completely unwound from the winding roller 4 and the building opening is fully closed, the biasing force accumulated in the coil spring 10 is at its maximum. When the screen 3, which is in the fully closed position, is wound onto the winding roller 4 and released, the biasing force accumulated in the coil spring 10 acts on the winding roller 4 in the winding direction of the screen 3, so that the screen 3 is automatically wound up by the winding roller 4.

[0028] In the screen device 1A, the winding roller 4 is rotatably supported in the winding box 6 via a bearing 13, so that the rotation of the winding roller 4 when opening and closing the screen 3 is very smooth, and problems such as rattling and noise generation that occur in conventional screen devices using sliding bearings do not occur. Furthermore, during maintenance of the screen device 1A, the screen winding unit 2, including the winding roller 4, can be easily removed from the winding box 6 along with the bearing 13 by removing the bearing retainer 25 from the bearing holder 24 and removing the bearing 13. This makes it easy to repair or replace the screen 3, winding roller 4, etc., if they are damaged, resulting in superior maintainability.

[0029] Figures 6-8 show a second embodiment of the screen device according to the present invention. This second embodiment of the screen device 1B differs from the first embodiment of the screen device 1A in that it has an operating force adjustment mechanism for averaging the operating force when opening and closing the screen 3.

[0030] In this second embodiment of the screen device 1B, the bearings 13 are attached to the first roller shaft 4b at the upper end and the second roller shaft 4c at the lower end of the winding roller 4, respectively. The outer ring 13b of the bearings 13 is sandwiched between bearing receivers 24 and bearing retainers 25 provided on the first brackets 11 and second brackets 12 at the upper and lower ends of the winding box 6, thereby supporting the winding roller 4 so that it can rotatably and detachably from the winding box 6. The upper and lower ends of the screen 3 and movable struts 14 are movably supported by the upper and lower horizontal frame rods 7 and 8. These aspects are the same as in the first embodiment of the screen device 1A. Therefore, the same reference numerals are used for the main identical components of both, as in the first embodiment of the screen device 1A, and their descriptions are omitted. Other components that differ from the screen device 1A will be described below.

[0031] In the front screen device 1B, the first roller shaft 4b is cylindrical, and the second roller shaft 4c is columnar, with a spring shaft 29 rotatably fitted inside the first roller shaft 4b. The lower end of the spring shaft 29 extends into the inside of the roller body 4a, and the upper end of the spring shaft 29 extends upward from the upper end of the first roller shaft 4b and protrudes above the first bracket 11 at the upper end of the winding box 6. For this reason, the first bracket 11 has a notch 11a formed therein for inserting and removing the upper end of the first roller shaft 4b which protrudes above the bearing 13 when attaching or detaching the winding roller 4.

[0032] A frustoconical wire drum 30 is attached to the upper end of the spring shaft 29, and one end of a wire 31 is connected to the wire drum 30. The wire 31 has a single wire section 31a on the base end side of the connection section 32 and a double wire section 31b on the tip side of the connection section 32. The single wire section 31a consists of a single wire and is wound onto or unwound from the wire drum 30 in accordance with the opening and closing operation of the screen. On the other hand, the double wire section 31b consists of two wires 31c and 31d. The two wires 31c and 31d of the double wire section are sequentially wrapped around a guide pulley 33 provided on the screen frame 5. The tip of one wire 31c is connected from the vertical frame rod 9 side to the upper front end of the movable crossbar 14, and the tip of the other wire 31d is connected from the vertical frame rod 9 side to the lower front end of the movable crossbar 14.

[0033] As can be seen from Figures 7 and 8, the winding roller 4 is configured to wind the screen 3 by rotating clockwise, and the wire drum 30 is configured to wind the wire 31 spirally from the large diameter end 30a to the small diameter end 30b by rotating counterclockwise. For this reason, spiral grooves 30c into which the wound wire 31 fits are formed on the outer surface of the wire drum 30, arranged spirally from the large diameter end 30a to the small diameter end 30b. Furthermore, the screen 3 and the wire 31 are related such that when the screen 3 is completely wound onto the winding roller 4, the wire 31 is completely unwound from the wire drum 30, and when the screen 3 is completely unwound from the winding roller 4, the wire 31 is completely wound onto the wire drum 30.

[0034] A coil spring 10 is housed inside the roller body 4a so as to surround the spring shaft 29, with one end (lower end) of the coil spring 10 connected to the spring shaft 29 and the other end (upper end) of the coil spring 10 connected to the first roller shaft 4b (and therefore the winding roller 4). Furthermore, when the screen is fully open, that is, as schematically shown in Figure 9, the screen 3 is completely wound onto the winding roller 4 and the wire 31 is completely unwound from the wire drum 30, an initial twist is applied to the coil spring 10 by increasing the number of turns of the coil spring 10. This initial twist causes a biasing force to act on the winding roller 4 and the spring shaft 29 in the direction that unwinds the coil spring 10. As a result, the winding roller 4 is biased in the direction of arrow a, which is the direction in which the screen 3 is wound, and the spring shaft 29 is biased in the direction of arrow b, which is the direction in which the wire drum 30 winds the wire 31.

[0035] Next, the operation of the screen device 1B of the second embodiment will be described with reference to Figures 9-11. Figures 9-11 are schematic diagrams that, for clarity, show the winding roller 4 and wire drum 30, which are provided coaxially, separated from each other, and also show the number of turns of the coil spring 10 reduced.

[0036] In the screen device 1B, as shown in Figure 9, when the screen 3 is fully opened in the initial state, the movable rib 14 is moved to the left (in the direction of arrow m) to unwind the screen 3 from the winding roller 4. As a result, the winding roller 4 rotates in the direction of arrow b, causing the coil spring 10 to twist. This biasing force causes the spring shaft 29 and the wire drum 30 to rotate in the direction of arrow b. Therefore, as shown in Figures 10 and 11, the wire drum 30 winds a wire 31 of a length corresponding to the amount of movement of the movable rib 14 in a spiral manner from the large diameter end 30a to the small diameter end 30b of the wire drum 30. At this time, the number of twists (turns) of the coil spring 10 may increase or decrease due to the rotational difference between the winding roller 4 and the spring shaft 29. However, the winding diameter of the screen 3 by the winding roller 4 and the winding diameter of the wire 31 by the wire drum 30 are related in such a way that there is no large difference between them at any opening or closing position of the screen 3. Therefore, the number of turns of the coil spring 10 does not increase or decrease significantly. For this reason, the operating force required to unwind the screen 3 from the fully open position in Figure 19 through the half-open position in Figure 10 to the fully closed position in Figure 11 is averaged out and does not change significantly.

[0037] Furthermore, when the movable strut 14 is moved to the right (in the direction of arrow n) in order to move the screen 3 from the fully closed position in Figure 11 to the fully open position in Figure 9 and wind the screen 3 onto the winding roller 4, the wire 31 is pulled out from the wire drum 30, causing the wire drum 30 and the spring shaft 29 to rotate in the direction of arrow a, twisting the coil spring 10, and the biasing force causes the winding roller 4 to rotate in the direction of arrow a and wind up the screen 3. At this time, the number of twists of the coil spring 10 may increase or decrease due to the rotational difference between the wire drum 30 and the winding roller 4. However, as with the closing operation of the screen 3, the winding diameter of the screen 3 by the winding roller 4 and the winding diameter of the wire 31 by the wire drum 30 are related in such a way that there is no large difference between them at any open or closed position of the screen 3. Therefore, the number of turns of the coil spring 10 does not increase or decrease significantly. For this reason, the operating force required to wind the screen 3 from the fully closed position in Figure 11 through the half-open position in Figure 10 to the fully open position in Figure 9 is averaged out and does not change significantly. Therefore, the spring shaft 29 and coil spring 10, and the wire drum 30 and wire 31 constitute the operating force adjustment mechanism.

[0038] In addition, while the first and second embodiments described above are horizontally opening screen devices that open and close building openings by moving the screen 3 horizontally, the present invention can also be applied to vertically opening screen devices that open and close building openings by raising and lowering the screen 3 vertically. In this case, the winding box is disposed at the upper or lower end of the building opening, and the winding roller is mounted inside the winding box via bearings so as to be rotatable about a horizontal axis. Furthermore, the present invention is not limited to the method of winding up the screen by rotating the winding roller with the biasing force of a coil spring as described above, but can also be similarly applied to manually operated screen devices that open and close the screen by rotating the winding roller with a ball chain. [Explanation of symbols]

[0039] 1A, 1B Screening device 2 Screen winding unit 3 screens 4. Winding roller 4b First roller shaft 4c Second roller shaft 6-roll box 10 Coil springs 11 First bracket 12 Second bracket 13 Bearings 13a Inner ring 13b Outer ring 13c Rolling element 24 Bearing mount 24a Contact surface 24b Mounting surface 25 Bearing retainer 25a Main body 25b Contact surface 25c mounting part 25d Screw insertion hole 26, 27 Mounting screws

Claims

1. A winding box is provided at one end of the building opening, and a screen winding unit is detachably attached to the inside of the winding box. the screen winding unit includes a screen for opening and closing the building opening, and a winding roller for winding and unwinding the screen, bearings as rolling bearings are attached to one and the other axial ends of the winding roller, a first bracket provided at one end of the winding box in the longitudinal direction and a second bracket provided at the other end of the winding box are provided with a bearing receiver and a bearing presser that is detachable from the bearing receiver, The bearing at one end of the winding roller is sandwiched between a bearing holder and a bearing presser of a first bracket of the winding box, and the bearing at the other end of the winding roller is sandwiched between a bearing holder and a bearing presser of a second bracket of the winding box, so that the winding roller is rotatably and removably supported inside the winding box. A screen device characterized by:

2. The screen device according to claim 1, characterized in that the bearings consist of concentrically arranged annular inner and outer rings and rolling elements interposed between the inner and outer rings, and are attached to both ends of the take-up roller by press-fitting the roller shafts at one end and the other end of the take-up roller into the inner ring, and the outer ring is sandwiched between the bearing support and the bearing presser.

3. the bearing support and the bearing holder each have a semicircular abutment surface against which an outer peripheral surface of an outer ring of the bearing abuts; the bearing support is attached to the inner surfaces of the first bracket and the second bracket of the winding box facing each other; The bearing holder is detachably attached to the bearing holder.

2. The screen device according to claim 1.

4. The bearing holder is made of a semicircular member, and has mounting surfaces at both ends for mounting the bearing holder, and screw holes are formed in the mounting surfaces. The screen device according to claim 3, characterized in that the bearing holder has a semicircular main body portion and mounting portions connected to both ends of the main body portion, a screw insertion hole formed in the mounting portion, and the bearing holder is attached by threading a mounting screw inserted into the screw insertion hole into a screw hole in the bearing holder.

5. 5. The screen device according to claim 1, wherein the bearing holders and the bearing holders attached to the first bracket and the second bracket have the same configuration, and can be attached to either the first bracket or the second bracket.

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