JP2007247216A5 - - Google Patents

Description

Adjusting device for winding spring of mesh or planar screen

  The present invention relates to an adjustment device for a winding spring in a winding device for a net-like or planar screen such as an insect screen, a projection screen or a shielding screen.

  Insect screens, projection screens, and shielding screens are generally used by winding them around a shaft and unwinding them (drawing out). As a means for this, a storage frame for the take-up shaft is provided as one frame of the frame at one end of the frame assembly that stretches the screen, and a handle frame is attached to the end on the drawer side of the screen, so that it can be moved to the frame assembly. The 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 a space between the screen winding cylinder and the central axis on which it rotates. A winding shaft device in which a winding spring is interposed is installed.

  FIG. 9 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 center in the frame. A winding shaft device 80 in which a winding spring 91 is interposed between the shaft 84 and the winding cylinder 86 is housed, and upper, middle, and lower bearing blocks 88, 89, 90 are fitted into the winding cylinder 86. A winding spring 91 is attached to the central shaft 84 between the upper bearing block 88 and the intermediate bearing block 89, and is fixed to the central shaft 84 by a clasp 92 at the upper end, and the intermediate bearing block 89 at the lower end. Fixed to.

  Since the insect screen 93 is pulled out by the handle frame 94 against the elasticity of the winding spring 91, the insect screen 93 is placed on the winding cylinder 86 that is rotated by the elasticity (elastic energy) accumulated in the winding spring 91 at this time. Is wound up. If the winding spring 91 is weak, winding may stop halfway or the insect net 93 may be loosened, and if the winding spring 91 is too strong, Since the net 93 is not completely closed or the retracted winding becomes rapid to a risk, the adjusting device 96 that weakens or strengthens the effect of the winding spring 91 is provided at the upper end of the storage frame 82. .

The winding spring adjusting device 96 is provided with a central gear connected to the central shaft 84 and a swing lever with a claw that engages with the ratchet, and a small-diameter driving auxiliary gear (central gear) that meshes with the central gear. And a pin spring or the like that is pivotally mounted to urge the swing lever. To increase the force of the take-up spring, rotate the central gear in that direction, When weakened, the center gear was reversely rotated to an appropriate level by releasing the swing lever.
Japanese Patent Application No. 2005-046950

  However, according to the conventional adjustment device for the take-up spring of the net-like or planar screen as described above, the elasticity of the pin spring is particularly low because the elasticity of the pin spring is weak and the shaft attachment is unstable. When the rocking lever is released against this, the return is delayed, so the ratchet cannot be fed one frame at a time, and the center axis may rotate excessively. There was a problem that it was difficult to make fine adjustments.

  In view of the above situation, the present invention is particularly advantageous in that the swinging lever with pawls is strongly pressed against the ratchet of the central gear with elasticity and the state is stably maintained. It is an object of the present invention to provide an adjustment device for a winding spring of a net-like or planar screen that can be easily adjusted.

  In order to solve the above-described problems, according to the present invention, one frame of the frame assembly is a screen storage frame, and the storage frame is provided with a screen winding shaft device. A winding spring is interposed between the winding cylinder and the central axis of the rotation, and the screen is pulled out by the rotation of the winding cylinder with respect to the central axis against the elasticity of the winding spring and the reverse due to the elasticity. In a net-like or planar screen take-up device adapted to be taken up by rotation, a base plate having a peripheral wall at the upper end of the storage frame and having an open port on the front surface, and a base plate overlapping above or below the base plate A central gear having a central shaft connected in an integral rotation is pivotally supported in a space between them, and the central gear is a compound gear composed of a large gear and a ratchet gear. Large Coil-type compression that pivotally supports a small-diameter sub-gear for driving meshing with a vehicle and a swing lever with a pawl that engages with the ratchet gear, while biasing the swing lever to engage with the ratchet gear A mesh-like or planar shape is characterized in that a spring chamber is housed, a storage chamber is formed in the base to directly store the compression spring, and a push button exposed at the opening is formed at the base end of the swing lever. An adjustment device for a screen winding spring is provided.

  Since the winding device for the net-like or planar screen is configured as described above, when the screen is pulled out, the winding cylinder rotates in the winding shaft device, and elastic force is accumulated in the winding spring between the central shaft. When the tension of the screen is released, the winding cylinder reversely rotates due to the accumulated elasticity, and the screen is wound up. Therefore, when it is found that the winding spring is weak due to insufficient tension and winding, the central gear is driven by the auxiliary gear to rotate the central shaft in the direction of winding the winding spring. Then, when stopped at an appropriate position, the stop is maintained by the engagement between the ratchet gear and the claw of the swing lever. When the screen is not completely closed or the winding is too early, the center shaft returns to weak due to the elasticity of the winding spring when the swing lever is released. In either case, the claw of the oscillating lever is urged by the ratchet gear, so the center shaft stops reliably at the adjustment position, but it is urged by the compression as a powerful coil spring. Since it is a spring and it is housed in the storage chamber, it operates stably and powerfully, so adjustment is ensured, especially when the winding spring is weakened, the ratchet can be easily fed one frame at a time. Fine adjustment without error.

  As described above, according to the present invention, the compression spring as the coil spring is used as the force for urging the swing lever with the pawl to the ratchet gear, and the coil spring is accommodated in the storage chamber. Since the spring acts strongly, there is an excellent effect that the one-frame feed of the ratchet is ensured, and in particular, it is possible to surely make an appropriate adjustment when the winding spring is weakened.

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

  FIG. 1 is a partially cutaway front view showing the entire mesh window. The frame assembly F has a storage frame 1 with a lid 5 as a vertical frame at one end, and a winding spring at the upper end. The adjusting device P is provided. The upper and lower frames 2 and 3 are connected to the storage frame 1 and have a vertical frame 4 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. Further, the storage frame 1 is internally provided with a winding shaft device 11 for the insect screen 9, which is pivotally supported by a winding spring adjusting device P at the upper end and a lower connecting block 15 at the lower end. The storage frame 1 is connected to the upper frame 2 and the lower frame 3 by a postscript member constituting the winding spring adjustment device P and a connection block 15.

  FIG. 2 shows a cross-sectional structure of the winding shaft device 11, and its upper end is shown in a connected state with the central gear 17 of the adjusting device P. That is, although it may be integrally connected with the central gear 17, in this embodiment, the winding shaft device 11 is detachable.

  The winding shaft device 11 includes a winding tube 11a that is slightly longer than the dimension between the upper and lower frames 2 and 3, a center shaft 19, a winding spring 21, an upper end lifting shaft device 23, a lower bearing 25, A lower end cap 30 with a lower end shaft 29 is formed. The winding spring 21 is fixed to the central shaft 19 with a rivet 32 at the upper end, and is fixed to the lower bearing 25 at the lower end. Therefore, when the insect repellent net 9 is pulled out (rewinded), elasticity is accumulated in the take-up spring 21 due to rotation of the take-up cylinder 11a with respect to the central shaft 19, and when the handle frame 7 is released, the elasticity is applied to the insect repellent net. 9 is caused to act in the rotational direction of winding around the winding cylinder 11a. Therefore, when the handle frame 7 is fixed to the vertical frame 4 by the adsorption of the magnets 27a and 27b, the insect screen 9 is strained over the entire surface. If this is loose, the adjustment device P corrects it.

  In order to make the winding spring 21 effective, it is necessary that the rotation of the central shaft 19 is prevented in at least one direction so as not to move by the rotation of the winding cylinder 11a. As will be described below, the adjusting device P is provided for adjusting the strength of the take-up spring 21 when the central shaft 19 is prevented from rotating and released.

  The upper end lifting shaft device 23 forms a clutch with the central gear 17, and includes a concave upper end cap 31 fitted to the upper end of the winding cylinder 11a, a movable connecting piece 33 dropped into the concave portion, The movable connecting piece 33 is fitted on the upper end of the central shaft 19 and fixed with a rivet 37 thereto. Further, the coil spring 35 is inserted into the central shaft 19 in the upper end cap 31 and receives the movable connecting piece 33 together with the central shaft 19 upward at the upper end. The movable connecting piece 33 has an upper end surface formed on the meshing clutch surface 39, a terminal shaft 41 protruding from the center thereof, and a driver groove 43 formed on the upper end of the terminal shaft 41. On the other hand, a lower shaft 38 projects from the center of the lower surface of the central gear 17 of the adjusting device P, and a clutch surface 40 that meshes with the clutch surface 39 is formed at the lower end thereof.

  When removing the take-up shaft device 11, it is first lifted. Then, the movable connecting piece 33 retracts into the upper end cap 31 against the elasticity of the coil spring 35 and responds accordingly, so that the lower end shaft 29 can be pulled out from the lower connecting block 15 by lifting the take-up shaft device 11 and attached. This is exactly the reverse operation. Therefore, the attaching / detaching operation can be performed only by the vertical operation of the winding shaft device 11. In this case, it is an extremely simple one-handed operation.

  The terminal shaft 41 at the upper end of the winding shaft device 11 is exposed to the upper surface of the mesh window F by being inserted into the shaft support hole 45 of the central gear 17. The shaft 19 can be rotated, and the winding spring 21 can be strongly adjusted by this operation as will be described later. Reference numeral 47 is a one-way clutch, and 48 is a rotary damper. The winding spring 21 controls the speed at which the winding cylinder 11a rotates.

  The adjusting device P is provided between a plastic base 49 screwed to the upper end of the storage frame 1 and a metal base plate 51 for sealing it, and connecting pieces 49a and 51a are provided in a projecting manner on the base plate 51, respectively. Thus, the storage frame 1 is coupled to the upper frame 2. A slit 53 through which the insect screen 9 passes is formed in the lower connecting piece 49a. FIG. 3 shows the structure of the adjusting device P installed in the base 49 without the base plate 51. In addition to the central gear 17 described above, the auxiliary gear 50 has a small diameter for driving. A swing lever 56 and a compression spring 52 as a coil spring are provided. In the figure, a part of the central gear 17 is notched for easy understanding.

As shown in FIG. 4 and FIG. 5, the base 49 projects a peripheral wall 55 that is close to the cross section of the housing frame 1 around the periphery, and opens a half (upper frame 2 side) of the peripheral wall 55 on the front surface. A storage chamber 61 of a compression spring 52 that opens forward is formed at the back of the opening 57, and a rotating shaft 62 of a swing lever 56 projects from an inner portion of the front blocking wall. A shaft support hole 63 of the central gear 17 is formed at the center, and a shaft support hole 64 of the auxiliary gear 50 is formed near the opening 57. Reference numeral 66 denotes a screw through hole that is fixed to the storage frame 1. The base plate 51 is also formed with a shaft support hole 63a of the central gear 17 and a shaft support hole 64a of the auxiliary gear 50. Reference numeral 66 a denotes a through hole for screwing the storage frame 1. It is also possible to adopt a structure in which the base 49 and the base plate 51 are turned upside down.

  The central gear 17 is a compound gear in which a ratchet gear 17b is formed under the large gear 17a (FIGS. 2 and 3), and has an upper shaft 69 corresponding to the lower shaft 38, and a winding shaft at the center. A shaft support hole 45 that supports the device 11 is formed, and a clutch surface 40 is formed on the lower surface of the lower shaft 38. Further, the swing lever 56 has a “<” shape that refracts around the rotation shaft 62, and has a claw 73 on the angle-of-attack side of the ratchet 71 formed at the tip, and is exposed to the opening 57 at the base end. Since the push button 75 is protruded and the compression spring 52 pushes the rear face thereof, when the push button 75 is pushed (FIG. 7), the claw 73 at the tip is detached from the ratchet 71, so that the stop of the central gear 17 is released. Is done. At this time, when the push is released at an appropriate position, the winding spring 21 is adjusted to be moderately weak.

That is, if the winding cylinder 11a is fixed at this time, the elasticity accumulated in the winding spring 21 is relieved by the rotation (depolarization rotation) of the central shaft 19 due to the elasticity of the winding spring 21. If the push button 75 is released at a certain point to stop the rotation of the central shaft 19, the winding spring 21 is adjusted weakly. Further, when the central gear 17 is rotated by the driver and the central shaft 19 is rotated against the elasticity of the take-up spring 21 (positive rotation), in this case, the pawl 73 of the swing lever 56 is stopped when the rotation is stopped. Since the central shaft 19 is securely engaged with the ratchet 71 of the central gear 17 and the winding shaft 21 is strongly adjusted. Further, since the driver groove 79 is also formed in the upper shaft 77 of the shaft of the auxiliary gear 50, if the auxiliary gear 50 is rotated, the central gear 17 can be lightly rotated by the gear boosting mechanism.

  In the adjustment device P for the take-up spring of the net-like or planar screen, the storage frame 1 is assembled so as to be removable from the frame assembly F as described above. Therefore, together with the storage frame 1, the winding shaft device 11, the insect screen 9, and the handle frame 7 can be detached at the same time as well as the adjusting device P at the upper end (see FIG. 8).

  FIGS. 8A and 8B illustrate the attachment and detachment of the storage frame 1 in a window frame according to an embodiment slightly different from the above embodiment. FIG. 8A shows the assembled state of the frame assembly F, and FIG. 8B shows the storage frame 1 removed. Each state is shown. That is, (a) shows the state of use, and the frame assembly F is composed of the vertical frame 4 facing the storage frame 1 and the upper and lower frames 2, 3, and the winding shaft device 11 is housed in the storage frame 1. The base 49 is provided with the adjusting device P at the upper end (in this case, the base plate 51 is under the base 49 but not shown). A connecting piece 49b projects from the base 49 and is screwed to the upper frame 2, and the connecting piece 15a of the lower connecting block 15 is inserted into the lower frame 3 and is also screwed. In this embodiment, it is assumed that the winding shaft device 11 cannot be removed in principle.

  However, when the upper and lower screws are removed and the storage frame 1 is removed, the take-up shaft device 11 is removed while keeping the interior (b). At the same time, the insect screen 9 and the handle frame 7 are also removed. Therefore, in this state, the adjusting device P at the upper end of the storage frame 1 can be operated to adjust the effect of the winding spring 21 (not shown) with the lid 5 removed, and the inside of the storage frame 1 can be adjusted. You can also clean it. In addition, although the shape of the connection piece 49b becomes various, in this case, it is a rectangular tube shape, and the slit which the insect repellent net 9 passes is formed similarly to the said embodiment.

It is the partially cutaway front view which shows the mesh window which concerns on this invention. It is a longitudinal cross-sectional view which shows the winding shaft apparatus in the same mesh window in the connection state with the central gear of the adjustment apparatus of a winding spring. It is a top view which partially cuts and shows the adjustment apparatus in the same mesh window. It is a top view which shows the base | substrate of the adjustment apparatus. It is sectional drawing of the AA arrow of FIG. It is a top view which shows the upper plate of an adjustment apparatus. It is plane explanatory drawing which carried out the partial cross section which shows the operation state of an adjustment apparatus. It is explanatory drawing which shows the assembly | attachment state (a) and storage state (b) of a storage frame as other embodiment of this invention. It is explanatory drawing of a prior art example.

Explanation of symbols

F Frame assembly P Adjusting device for winding spring of mesh or planar screen 1 Storage frame 9 Insect-proof net as screen 11 Winding shaft device 11a Winding cylinder 15 Connecting block 17 Central gear 17a Large gear 17b Ratchet gear 19 Central shaft 21 Winding spring
49 base 49a, 49b connecting piece 50 auxiliary gear 51 base plate 51a connecting piece 52 compression spring 55 peripheral wall 56 swing lever 57 opening 61 storage chamber 73 claw 71 ratchet 75 push button

Claims (1)

  One frame of the frame assembly is a storage frame for the screen, and the storage frame is internally provided with a screen winding shaft device. The winding shaft device includes a winding cylinder for winding the screen, and a central axis of rotation thereof. A mesh-like surface or surface in which a winding spring is interposed between the screen and the screen is pulled out by rotation of the winding cylinder with respect to the central axis against the elasticity of the winding spring and wound by reverse rotation accompanying elasticity. In a cylindrical screen winding device, a base plate having a peripheral wall and an opening on the front surface is fixed to the upper end of a storage frame, and a base plate overlapping above or below is fixed, and a central axis is integrally rotated in a space therebetween The central gear is pivotally supported, and the central gear is a compound gear composed of a large gear and a ratchet gear, and the space further includes a small-diameter auxiliary gear for driving meshing with the large gear of the central gear. , La A coiled compression spring is provided to support the swinging lever with a claw that engages with the gear wheel, and the swinging lever is biased to engage with the ratchet gear. A retraction spring adjusting device for a net-like or planar screen, characterized in that a storage chamber is formed, and a push button exposed to the opening is formed at the base end of the swing lever.