JP2012062676A - Screen winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate waste in the case of standardization of a component by installing an oil damper separately from a spring shaft of a coil spring so as to dispense with the long spring shaft.SOLUTION: A coil spring 18 and an oil damper 22 are disposed inside a winding shaft 16. One end of the coil spring 18 is fixedly connected to a side of a first end 12a of a winding box 12, and the other end thereof is fixedly coupled to the winding shaft 16 via a spring retainer 29. In the oil damper 22, a first damper member 22a of the first and second damper members 22a and 22b, the mutual rotation of which is restricted during a screen winding operation via a damper mechanism using a viscous fluid, is fixedly connected to a side of a second end 12b of the winding box 12, and the second damper member 22b is fixedly connected to the winding shaft 16.

Description

  The present invention relates to a screen winding device in a winding screen device for insect repellent, light shielding, heat insulation, blindfolding and the like.

  In general, as shown in FIG. 1, an insect screen door is used as a representative example of the winding screen device. The upper and lower guide rails 13a and 13b extend horizontally, and the receiving frame 14 is mounted between the tip ends of the upper and lower guide rails 13a and 13b. One end of a (net) 15 is connected, a slide bar 17 is attached to the tip of the screen 15, and the screen 15 is wound by moving the slide bar 17 left and right along the guide rails 13a and 13b. It is opened and closed by being wound around the take-up shaft 16 or being drawn out from the take-up shaft 16.

  The winding shaft 16 uses the torsional restoring force of a built-in coil spring as a driving source for winding the screen. In addition to this coil spring, the winding shaft can rotate at high speed when winding the screen. An oil damper is provided to prevent the screen from being taken up rapidly by rotating.

  4 and 5 show a configuration of a conventional screen winding device used in a winding screen device. In this screen winding device, the coil spring 40 and the oil damper 41 are disposed inside a winding shaft 16 rotatably disposed in the winding box 12, and the inside of the coil spring 40 is disposed inside. The penetrating metal spring shaft 42 is disposed so as not to be mutually locked in the rotational direction with respect to the winding shaft 16.

  An upper end 42 a of the spring shaft 42 extends upward from the winding shaft 16 and is fixedly locked to an upper end portion of the winding box 12, and a lower end of the spring shaft 42 extends downward from the coil spring 40. It is extended. The upper end of the coil spring 40 is fixed to the spring shaft 42 with a screw 44, and the lower end of the coil spring 40 is connected to the winding shaft 16 via a spring receiver 43.

  Further, the oil damper 41 has a configuration as disclosed in, for example, Patent Document 1, and a first damper member in which mutual rotation at the time of winding the screen is limited by the intervention of a damper mechanism using a viscous fluid. 41a and a second damper member 41b, the first damper member 41a is fixedly connected to the lower end of the spring shaft 42 with a screw 45, and the second damper member 41b is fixed to the take-up shaft 16. Connected.

In the winding device, when the screen 15 is pulled out from the state where the screen 15 is completely wound around the winding shaft 16, the winding shaft 16 is rotated and the coil spring 40 is twisted to store energy. .
When the screen 15 is wound around the winding shaft 16 in order to open the screen door, the winding shaft 16 is driven and rotated by the twist restoring force of the coil spring 40, and the screen 15 is automatically wound up. At this time, the rotational speed of the winding shaft 16 is limited by the oil damper 41, and the screen 15 is prevented from being wound at high speed.

JP 2003-106076 A

  In the conventional winding device, a metal spring shaft 42 is disposed inside the winding shaft 16 so as to extend outside through the coil spring 40, and an oil damper is provided at the tip of the spring shaft 42. 41 is attached. For this reason, the spring shaft 42 having a length longer than that of the coil spring 40 is required, and the fact that it is made of metal increases the cost and the weight of the winding shaft. .

  Further, when the coil spring 40 and the spring shaft 42 are standardized as a set and the oil damper 41 is set to be added thereto, the same spring shaft 42 is used for the set with and without the oil damper 41. Therefore, there is also a problem that use of the long spring shaft 42 causes waste in a set without the oil damper 41. In order to avoid such problems, if the spring shafts with different lengths are used for the set with and without the oil damper 41, various sets are prepared according to the size of the winding device, etc. Will have to.

  Therefore, an object of the present invention is to install the oil damper separately from the spring shaft of the coil spring, thereby eliminating the need for a long spring shaft and eliminating waste when standardizing parts, The purpose is to create a reasonable design structure at a low cost.

  In order to achieve the above-mentioned object, the present invention provides a winding box having a first end and a second end opposite to a winding box, and a winding shaft containing a coil spring is supported at both ends by bearing members and is rotatable. One end of the screen is connected to the winding shaft, the coil spring is twisted by the rotation of the winding shaft when the screen is pulled out, and the winding shaft is rotated by the torsional restoring force of the coil spring. In the screen winding device configured to be rotated to wind the screen, the coil spring and the rotation speed of the winding shaft when winding the screen are limited in the winding shaft. An oil damper is disposed, and one end of the coil spring is fixedly connected to the first end side of the winding box, and the other end is fixedly connected to the winding shaft. The damper has a first damper member and a second damper member that are restricted in mutual rotation at the time of winding the screen by interposing a damper mechanism using a viscous fluid, and the first damper member is a second damper member of the winding box. The second damper member is fixedly connected to the winding shaft, and the second damper member is fixedly connected to the winding shaft.

  In the present invention, one end of the coil spring is connected to the first end side of the winding box via a spring shaft, and the other end is connected to the winding shaft via a spring receiver, It is preferable that a guide shaft that fits into the winding shaft is provided at the two ends, and the first damper member of the oil damper is connected to the guide shaft.

  The guide shaft is preferably integrated with a second bearing member provided on the second end side of the winding box.

  In the screen winding device of the present invention, the oil damper is separated from the spring shaft of the coil spring and is connected to the second end side of the winding box. No spring shaft is required. As a result, not only can the cost be reduced, but when the coil spring and the spring shaft are standardized as a set and an oil damper is added to the standard, a long metal set with no oil damper is set. The waste of having to use a spring shaft is completely eliminated, and there is no need to prepare multiple types of sets to use different lengths of spring shafts with and without oil dampers. .

It is a perspective view of the winding type screen apparatus provided with the screen winding apparatus which concerns on this invention. It is a perspective view which abbreviate | omits a part member and shows the part of the screen winding apparatus in FIG. It is sectional drawing which fractured | ruptured FIG. 2 along the axis line of a winding shaft. It is a perspective view which abbreviate | omits one part member and shows the conventional screen winding apparatus. It is sectional drawing which fractured | ruptured FIG. 4 along the axis line of a winding shaft.

  FIG. 1 shows a take-up screen device 10 provided with a screen take-up device 11 according to the present invention, and this screen device 10 is configured as a side-opening insect screen.

  The screen device 10 includes a winding box 12 arranged vertically, upper and lower guide rails 13a and 13b extending horizontally from the upper and lower ends of the winding box 12, respectively, and the upper and lower guide rails 13a and 13b. A take-up shaft 16 for winding a screen (net) 15 inside the take-up box 12 has an axis L. The receiving frame 14 is vertically installed between the front end portions of the guide rails 13a and 13b. It is accommodated vertically in a vertically oriented posture, one end of the screen 15 is connected to the winding shaft 16, and a slide bar 17 is attached to the other end (tip) of the screen 15.

  The upper and lower ends of the slide bar 17 and the screen 15 are fitted or engaged with guide grooves formed in the upper and lower guide rails 13a and 13b, respectively. When the screen 15 is moved to the left in FIG. 1 along the line 13b, the screen 15 is pulled out from the winding shaft 16 in the winding box 12 along the upper and lower guide rails 13a and 13b, and the slide bar 17 is moved up and down the guide rail 13a. , 13b is moved to the right in FIG. 1 so that the screen 15 is wound on the winding shaft 16 in the winding box 12 along the upper and lower guide rails 13a, 13b.

  When the screen 15 is pulled out to the maximum and the screen device 10 is in use as a screen door, the slide bar 17 abuts on the receiving frame 14 and can be locked to the receiving frame 14 with a locking bracket.

  2 and 3, the winding shaft 16 uses a restoring force when the coil spring 18 is twisted, that is, a twisting restoring force as a driving source for winding the screen 15, A cylindrical shaft main body 19 and a cylindrical first support member 20 and a second support member 21 attached to the upper end and the lower end of the shaft main body 19, respectively. The coil spring 18 and the oil damper 22 for preventing the screen 15 from being rapidly wound when the winding shaft 16 rotates at a high speed when the screen 15 is wound, are located at different positions in the axis L direction, That is, it is built in so as to occupy an upper position and a lower position.

  Hereinafter, based on FIG.2 and FIG.3, the specific structure of the screen winding apparatus 11 which has the said winding shaft 16 is demonstrated. In the description, one end (upper end in the figure) of the winding box 12 in the length direction is called a first end 12a and the other end (lower end in the figure) is called a second end 12b as necessary.

  2 and 3, a first bearing member 24 and a second bearing member 25 made of synthetic resin are attached to the first end 12a side and the second end 12b side of the winding box 12, respectively. One end (upper end) and the other end (lower end) of the winding shaft 16 are rotatably supported by the members 24 and 25, respectively.

The first bearing member 24 has a cylindrical bearing portion 24 a, and the bearing portion 24 a is relative to the upper end portion of the circular hole 26 formed in the first support member 20 at the upper end of the winding shaft 16. The upper end of the winding shaft 16 is rotatably supported by the bearing portion 24a.
A flange-shaped end plate portion 20 a is formed at the upper end of the first support member 20, the hole 26 is opened at the center of the upper surface of the end plate portion 20 a, and a spring shaft 27 is first in the hole 26. It is inserted so as to penetrate the support member 20.

  The second bearing member 25 has an oval shape in plan view, and has a smooth bearing surface 25a on the upper surface thereof. The second support member at the lower end of the winding shaft 16 is formed on the bearing surface 25a. A disk-like contact portion 21a formed on the contact 21 abuts and rotates in a sliding state.

  A cylindrical support portion 25b is formed at the center of the bearing surface 25a, and a columnar guide shaft 28 extending upward from the center of the support portion 25b is provided. The support portion 25b and the guide A shaft 28 is fitted into a circular recess 21b formed in the second support member 21 and a guide hole 21c so as to be rotatable relative to each other, and the winding shaft 16 is formed by the support portion 25b and the guide shaft 28. It is supported not to shake. The length of the guide shaft 28 is about 1/10 to 2/10 of the length of the winding shaft 16 and slightly protrudes upward from the second support member 21. The guide shaft 28 is preferably made of synthetic resin and integrally with the second bearing member 25 together with the support portion 25b.

The coil spring 18 is disposed at a position near the upper end inside the winding shaft 16, that is, a position near the first end 12 a side of the winding box 12, and one end, that is, the upper end of the coil spring 18, The lower end 27a of the spring shaft 27 is fitted and fixed near the lower end. For example, the lower end 27a of the spring shaft 27 is press-fitted inside the coil spring 18, or the end of the coil spring 18 is bent inward and the side surface of the spring shaft 27 to be fitted is fixed. It can be performed by a method of inserting and locking in the locking hole, a screwing method or the like.
On the other hand, the other end, that is, the lower end of the coil spring 18 is fixedly connected to the inner periphery of the winding shaft 16 via a cylindrical spring receiver 29.

  An upper end 27b of the spring shaft 27 is formed in a square shaft shape, protrudes upward from the first support member 20, and is in a rectangular locking hole 24b formed on the lower surface of the bearing portion 24a of the first bearing member 24. Are fixedly connected to the first end 12a side of the winding box 12 by being fitted and locked to each other. Therefore, one end of the coil spring 18 is fixedly connected to the first end 12 a side of the winding box 12 via the spring shaft 27. The spring shaft 27 is preferably made of synthetic resin in consideration of cost, ease of manufacture, and the like, but may be made of metal.

  The lower end of the spring shaft 27 may extend through the inside of the coil spring 18 to the position of the spring receiver 29, and may be in sliding contact with the spring receiver 29 so as to be rotatable relative to each other.

  The oil damper 22 is disposed at a position near the lower end in the winding shaft 16, that is, a position near the second end 12 b of the winding box 12. The oil damper 22 includes a cylindrical first damper member 22a and a second damper member 22b. The first damper member 22a and the second damper member 22b are each configured as a damper mechanism using a viscous fluid. The first damper member 22a is fixed to the upper end portion of the guide shaft 28 with a screw 33 so that the relative rotation during the winding operation of the screen 15 is limited by the interposition of the screen 15). Thus, the winding box 12 is fixedly connected to the second end 12 b side, and the second damper member 22 b is fixedly connected to the inner surface of the winding shaft 16.

The first damper member 22a and the second damper member 22b have a one-way clutch mechanism (not shown) interposed therein, so that the damper mechanism works only when the screen 15 is wound, and relative rotation is limited. Is pulled out from the winding shaft 16, the one-way clutch mechanism is idled so that the damper function is not exhibited.
In addition, since the specific structure of the oil damper 22 is known, for example, from Patent Document 1, further specific description is omitted here.

  In the screen winding device 11 having the above-described configuration, when the screen 15 is pulled out from the state where the screen 15 is completely wound around the winding shaft 16 to close the screen door, the winding shaft 16 rotates forward. Thus, the coil spring 18 is twisted and energy is stored. At this time, the first damper member 22a and the second damper member 22b of the oil damper 22 idle each other, and the damper function is not exhibited.

  When the screen 15 is wound around the winding shaft 16 in order to open the screen door, the winding shaft 16 is reversely rotated by the twist restoring force of the coil spring 18, and the screen 15 is automatically wound up. At this time, the first damper member 22a and the second damper member 22b of the oil damper 22 exhibit a damper function by the intervention of a damper mechanism using a viscous fluid, and the rotational speed of the winding shaft 16 is limited. The screen 15 is prevented from being wound at a high speed.

  The screen winding device 11 separates the oil damper 22 from the spring shaft 27 of the coil spring 18 and is disposed at a position opposite to the coil spring 18 in the winding shaft 16. Since it is connected to the guide shaft 28 formed on the 12b side, a long metal spring shaft extending through the coil spring 18 as in the prior art is unnecessary.

  As a result, not only can the cost be reduced, but when the coil spring 18 and the spring shaft 27 are standardized as a set and the oil damper 22 is added thereto, the oil damper 22 is not included. It is possible to completely eliminate the need to use a long spring shaft made of metal. Furthermore, there are several types of sets to use different lengths of spring shafts with and without the oil damper 22 set. There is no need to prepare.

  The above embodiment is a screen winding device used in a laterally opening type screen device that opens and closes by moving the screen 15 left and right. However, the present invention opens and closes the screen 15 by moving it up and down. The present invention can also be applied to a screen take-up device used for a vertical opening type screen device.

DESCRIPTION OF SYMBOLS 11 Screen winding device 12 Winding box 12a 1st end 12b 2nd end 15 Screen 16 Winding shaft 18 Coil spring 22 Oil damper 22a 1st damper member 22b 2nd damper member 24, 25 Bearing member 27 Spring shaft 28 Guide shaft 29 Spring receiver

Claims (3)

Inside the winding box having a first end and a second end opposite to the winding box, a winding shaft containing a coil spring is rotatably supported with both ends supported by bearing members. The coil spring is twisted by rotation of the winding shaft when the one end is connected and the screen is pulled out, and the screen is wound by rotating the winding shaft by the torsional restoring force of the coil spring. In the configured screen winding device,
Inside the winding shaft, the coil spring and an oil damper for limiting the rotational speed of the winding shaft when winding the screen are disposed,
The coil spring has one end fixedly connected to the first end side of the winding box and the other end fixedly connected to the winding shaft.
The oil damper has a first damper member and a second damper member that are restricted in mutual rotation at the time of winding the screen by the intervention of a damper mechanism that uses a viscous fluid, and the first damper member is provided in the winding box. The second damper member is fixedly connected to the second end side, and the second damper member is fixedly connected to the winding shaft.
A screen take-up device. One end of the coil spring is connected to the first end side of the winding box via a spring shaft, and the other end is connected to the winding shaft via a spring receiver,
The second end of the winding box is provided with a guide shaft that fits into the winding shaft, and the first damper member of the oil damper is connected to the guide shaft.
The screen winding device according to claim 1.   The screen winding device according to claim 2, wherein the guide shaft is integral with a second bearing member provided on a second end side of the winding box.

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