JP2007303111A - Winding braking device for net-like or planar screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a braking device for reducing a winding speed, in a framed body in which a screen is wound with elasticity accumulated in a coiled spring, when the screen such as an insecticidal net is pulled out to be stretched. <P>SOLUTION: In the framed body, one frame of a framework for being opened/closed by the screen is a storage frame in which a screen winding shaft body is internally mounted, and connecting blocks for the framework are fixed to both ends of the storage frame, respectively. In the winding shaft body, the coiled spring is interposed between an outer cylinder for winding the screen, and a central shaft for journaling the outer cylinder. The screen is pulled out along with the counterrotation of the outer cylinder with respect to the shaft against the elasticity of the coiled spring, and wound by normal rotation by the elasticity. The unidirectional braking device for controlling the speed of the normal rotation of the outer cylinder with respect to the shaft by the coiled spring is internally mounted or embedded in either of the connecting blocks. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a mesh-like structure in a frame assembly that can draw out screens such as insect screens, projection screens, and shielding screens from the storage frame, and at the same time, can be wound up with the elastic force accumulated in the coil spring. The present invention also relates to a winding brake device for a planar screen.

  In the frame assembly, screens such as insect screens, projection screens, and shielding screens are generally used by being wound around a shaft and rewound (drawn out). As a means for this, a storage frame for finishing it is provided at one end of the frame assembly as one frame of the frame, and a handle frame is attached to the end on the drawer side of the screen. In addition, since it is necessary to automatically wind up and to hold the screen tightly by pulling the handle frame, the storage frame has an outer cylinder that winds as a shaft for winding the screen and it rotates. A winding shaft body in which a coil spring is interposed between the shaft and the central shaft is housed.

  FIG. 8 shows a conventional example (Patent Document 1) according to the present applicant concerning a mesh window on which an insect screen is stretched, and has a storage frame 82 at one end of a frame assembly F of the mesh window, and a shaft therein. 84 and an outer cylinder 86 are provided with a winding shaft 80 having a coil spring 91 interposed therein. Upper, middle and lower bearing blocks 88, 89, 90 are fitted into the outer cylinder 86, and an upper bearing is provided. A coil spring 91 is mounted on the shaft 84 between the block 88 and the intermediate bearing block 89, and is fixed to the shaft 84 by a clasp 92 at the upper end and fixed to the intermediate bearing block 89 at the lower end.

  Since the insect screen 93 is pulled out by the handle frame 94 against the elasticity of the coil spring 91, the insect screen 93 is wound around the outer cylinder 86 that is rotated by the elasticity (elastic energy) accumulated in the coil spring 91 at this time. It is done. If the effectiveness of the coil spring 91 is weak, winding may stop halfway or the insect net 93 may be loosened, and if the coil spring 91 is too effective, the insect net 93 Since the coil spring 91 is not completely closed or retracted rapidly, the adjusting device 96 for weakening or strengthening the effect of the coil spring 91 is provided at the upper end of the storage frame 82. In addition, although the invention of this application described embodiment about the case where there is no adjustment apparatus 96 so that it may mention later, it can implement also when there exists.

By the way, the adjusting device 96 is provided with a central gear connected to the shaft 84 and a lever with a claw that engages with the ratchet, and in addition to a small-diameter driving auxiliary gear that meshes with the central gear (a boost to the rotation of the central gear). The center gear rotates in that direction when the coil spring force is increased, and the central gear is rotated backward to an appropriate level by releasing the lever. It was the structure.
Japanese Patent Application No. 2005-046950

  In any case, according to the conventional screen winding device as described above, the coil springs are strengthened in order to tension the insect repellent net and to prevent unfinished residues. When adjusted, there is a disadvantage that when the handle frame is released from the vertical frame, the handle frame moves suddenly and feels dangerous.

  The present invention reduces the winding speed in the frame structure in which the screen is wound with the elasticity accumulated in the coil spring when the screen is pulled out to stretch the screen such as an insect screen from the above situation. An object of the present invention is to provide a braking device for this purpose.

  In order to solve the above problems, the present invention provides a storage frame in which one frame that is opened and closed by a screen is provided with a winding shaft body of the screen, and the frame is connected to both ends of the storage frame. In the frame assembly to which the block is fixed, the winding shaft body has a coil spring interposed between an outer cylinder that winds the screen and a central shaft that supports the screen, and resists the elasticity of the coil spring. With the reverse rotation of the outer cylinder with respect to the shaft, the screen is pulled out and wound up by the positive rotation by elasticity, and the speed of the normal rotation of the outer cylinder with respect to the shaft by the coil spring is set in one connecting block. Provided is a reticulated or planar screen take-up brake device, characterized in that a one-way brake device to be controlled is internally or embedded.

  Since the winding brake device for the net-like or planar screen is configured as described above, if the screen is pulled out and the outer cylinder is rotated in reverse, the elastic force is accumulated in the coil spring. Although it rotates forward, it pulls back and winds up, the one-way brake device operates at that time, and the normal rotation of the outer cylinder is controlled.

  As described above, according to the present invention, when the screen is pulled into the storage frame by the elasticity of the coil spring, the screen pull-in speed is controlled so that it does not feel dangerous. be able to. In addition, since the one-way braking device for that purpose is embedded or embedded in the connecting block, the structure of the winding shaft body does not become complicated, and maintenance management of the winding shaft body and the one-way braking device becomes easy. Has an excellent effect.

  According to claim 2, the take-up shaft can be easily attached and detached for maintenance management or the like.

  The drawings show an embodiment in which the present invention is applied to a screen door or screen of an insect screen, but the present invention can be similarly applied to a projection screen and a shielding screen.

  FIG. 1 is a partially cutaway front view showing the entire mesh window, and its frame assembly F has a storage frame 1 with an open / close lid 5 (see FIG. 6) as a vertical frame at one end. In addition, upper and lower frames 2 and 3 are connected by blocks 12 and 13, and a vertical frame 4 is provided at the other end. Further, a handle frame 7 is attached to the end of the insect screen 9 and is movably engaged with both the upper and lower frames 2 and 3. The storage frame 1 is provided with a winding shaft 11 of an insect screen 9, which is detachably supported at the upper end by an upper connecting block 12 and at the lower end by a lower connecting block 13. A one-way braking device 10 for the winding shaft 11 is embedded. Further, in order to make the take-up shaft 11 detachable, an upper end lifting shaft device 14 is provided at the upper end thereof, whereby the upper end of the shaft 25 is fixed to the upper connecting block 12 by clutch connection. Yes.

  Although the one-way braking device 10 can take various forms, the invention of the present application is characterized in that it is embedded or embedded in the lower connecting block 13. In the present invention, a one-way braking device 10 having a one-way rotary damper (one-way) can be used. However, in this embodiment, a one-way clutch 15 and a rotary damper 17 different from those are used. The thing which becomes becomes.

  The upper connecting block 12 and the lower connecting block 13 are formed of plastic or the like, and are thick plates that hit the end face of the storage frame 1 and are bifurcated to be fitted into the upper and lower frames 2 and 3 and screwed. The connecting pieces 12a and 13a are projected, and end plates 19 and 21 of metal plates are overlapped with each other, and the upper connecting block 12 and the lower connecting block 13 overlap with each other and are screwed to the storage frame 1 (see FIG. 5). ). In FIG. 6, reference numeral 23 denotes a screw pocket into which the screw 22 is screwed.

  The winding shaft 11 has a coil spring 29 interposed between a shaft 25 that is fixed at all times and an outer cylinder 27 that winds up the insect screen 9. The fixed piece 33 and the lower cap 35 are fixedly fitted, and the outer cylinder 27 is rotatably supported with respect to the shaft 25 by using the upper cap 31 and the intermediate fixed piece 33 as bearings. Since the upper end of the coil spring 29 is fixed to the shaft 25 and the lower end is fixed to the intermediate fixing piece 33, when the outer cylinder 27 pulls out the insect net 9 (for rewinding) (see FIG. 6), The coil spring 29 is twisted by the reverse rotation of the outer cylinder 27 in the Q direction. Since the elasticity is accumulated by this twisting, the insect net 9 can be kept closed by keeping the handle frame 7 on the vertical frame 4. Reference numerals 37a and 37b denote magnets for holding the handle frame 7 closed.

  When the handle frame 7 is released, the outer cylinder 27 is rotated forward in the P direction by the elasticity accumulated in the coil spring 29 (see FIG. 6), and the insect screen 9 is wound around it. In order to control this speed, a leg shaft portion 39 for connecting to the one-way braking device 10 is suspended from a lower cap 35 integral with the outer cylinder 27, and a connecting shaft hole 41 coaxial with the shaft 25 is formed thereon. It is. Therefore, the one-way braking device 10 is configured to freely reversely rotate the leg shaft portion 39 in the Q direction and to control forward rotation in the P direction.

  For this purpose, the one-way braking device 10 is provided with an input shaft 2 projecting from the center for connection with the leg shaft portion 39. Therefore, when the take-up shaft body 11 is attached, if the connecting shaft hole 41 is dropped into it, the lower end of the take-up shaft body 11 is pivotally supported by the input shaft 2 and the outer cylinder 27 is integrated with the input shaft 42. It will be in a rotating state. A pressing screw 40 is used to fix the input shaft 2 and the leg shaft portion 39 for connection. However, other fixing means such as fitting the connecting shaft hole 41 and the input shaft 42 into a square shape can be taken.

  The one-way braking device 10 is provided with a one-way clutch 15 so as to transmit only forward rotation (P) to the rotary damper 17, and a seat plate 45 for stabilization is integrally provided at the lower end of a low cylindrical case 43. The one-way clutch 15 is configured in the case 43, and the rotary base plate 47 that rubs against the seat plate 45 by the connection is fitted to the bottom portion of the case 43 to configure the rotary damper 17. In order to embed this in the lower connection block 13, an embedding hole 50 into which the lower half of the case 43 is fitted is formed, and the bottom plate 52 and the end face plate 21 are sealed so as not to fall off.

  Since the input shaft 42 is a rotary shaft integrated with the outer cylinder 27 of the winding shaft body 11, the input shaft 42 is pivotally supported by the case 43 so as to freely rotate via upper and lower bearings 49 and 51. Further, in the case 43, a ratchet wheel 55 is fixedly attached to the input shaft 42 with a pin, and a ratchet lever 59 is pivotally supported on the rotary base 47 by a pin 61 (FIG. 4). The ratchet lever 59 is biased by the coil spring 63 so as to be engaged with the ratchet of the vehicle 55. Thus, since the ratchet wheel 55 that rotates integrally with the outer cylinder 27 is engaged with the ratchet lever 59 only during the forward rotation (P), the rotation is transmitted to the rotary base 47, and the rotary base is caused by friction with the seat plate 45. 47, that is, the rotation of the outer cylinder 27 is controlled.

  The upper end lifting shaft device 14 is a means for easily attaching and detaching the take-up shaft body 11. The structure of the upper end lifting shaft device 14 constitutes a clutch with the upper connection block 12. In the center, a vertical hole 64a is provided, and a bearing piece 60 having a meshing clutch surface 68 is fitted therein. The upper end of the take-up shaft 11 is composed of a concave upper cap 31, a movable connecting piece 65 dropped into the concave portion, and a compression acting to resist dropping, as the configuration of the upper-end lifting shaft device 14. A spring 67 is assembled, and the movable connecting piece 65 is fitted to the upper end of the shaft 25 and fixed thereto by a rivet 69. The compression spring 67 is inserted into the shaft 25 in the upper cap 31 and receives the upper end of the movable connection piece 65 so as to bias it upward. The movable connecting piece 65 is formed with a flange 72 that is stably joined to the upper connecting block 12 at the upper end, and a meshing clutch surface 69 is formed at the center thereof so as to fit into the vertical hole 64a. Furthermore, a terminal shaft 71 that fits in the shaft hole 64 at the center of the bearing piece 60 is provided in the center. The flange portion 72 serves to support the winding shaft 11 in a vertical and stable manner, but is also connected to a friction clutch by rough surface bonding with the lower surface of the upper connecting block 12.

  Therefore, when the take-up shaft 11 is removed, first, the input shaft 42 is lifted by lifting the take-up shaft 11 while lowering the movable connecting piece 65 against the elasticity of the compression spring 67. The leg shaft part 39 is extracted from In addition, the operation is exactly the reverse when attaching.

1 is a partially cutaway front view of a screen door or screen showing an embodiment of the present invention. It is sectional drawing explaining the winding braking device of the net-like or planar screen in the same screen door or a net window. It is an expanded sectional view which shows the A section (lower end part of FIG. 2) of FIG. It is sectional drawing of the BB line arrow of FIG. It is a top view of the CC arrow of FIG. It is sectional drawing of the DD arrow of FIG. It is sectional drawing of the EE line arrow of FIG. It is explanatory drawing of a prior art example.

Explanation of symbols

F Frame assembly 1 Storage frame 9 Insect screen as screen 10 One-way braking device 11 Winding shaft body 12 Upper connecting block 13 Lower connecting block 14 Upper lift shaft device 15 One-way clutch 17 Rotary damper 25 Shaft 27 Outer cylinder 29 Coil spring 35 Lower cap 39 Leg shaft part 42 Input shaft 64 Shaft hole 68, 69 Engagement clutch surface 71 Terminal shaft 72 Hook P Forward rotation Q Reverse rotation

Claims (2)

  One frame that is opened and closed by the screen is a storage frame in which the winding shaft body of the screen is housed, and the frame assembly in which connecting blocks for the frame are fixed to both ends of the storage frame. In the shaft body, a coil spring is interposed between an outer cylinder that winds up the screen and a central shaft that supports the screen, and the screen rotates with the reverse rotation of the outer cylinder with respect to the shaft against the elasticity of the coil spring. The one-way braking device that is pulled out and wound by the forward rotation by the elastic force and controls the speed of the outer cylinder in the forward rotation with respect to the shaft by the coil spring is embedded or embedded in one of the connection blocks. A winding brake device for a mesh-like or planar screen, characterized in that. An input shaft in which a leg shaft portion is suspended from a lower cap fixed to the outer cylinder of the winding shaft body, and the leg shaft portion is dropped and connected to a one-way braking device embedded in the lower connecting block. The upper connecting block is provided with a shaft hole that supports the winding shaft body, a clutch surface is formed on the lower surface, and a terminal shaft that is supported by the shaft hole is provided at the upper end of the outer cylinder. In addition, an upper end lifting shaft device that urges it upward with a compression spring is formed, and a flange portion is formed at the base end of the terminal shaft to be connected to the upper coupling block in a clutch, and resists the elasticity of the compression spring. 2. A net-like or planar screen take-up braking device according to claim 1, wherein the take-up shaft is lifted so that the leg shaft portion can be attached to and detached from the input shaft.