JPH0620887U - Screen opener - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a screen opening / closing device capable of securely fixing the opening / closing position of the screen. [Structure] By manually pulling down a plurality of lifting cords 3 hanging from the right end of a box-type rail, a movable metal fitting inside the lock unit fixed to the end on the same side is vertically swung.
That is, the movable metal fittings are swung to the unlocked position, and the biting teeth of the holding rollers pivotally supported on the lock unit side and the biting teeth 1 of the holding rollers 11, 16 pivotally supported on the movable metal fitting side.
By separating 1a and 16a from each other, the blind can be opened and closed at an arbitrary height. On the other hand, by swinging the movable bracket to the lock fixed position, each bit of the holding roller pivotally supported on the lock unit side and each bit of the sandwiching roller pivotally supported on the movable bracket side are provided with a plurality of lifting cords. The opening and closing position of the blind can be fixed by biting into the blind.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a screen opening / closing device used for opening / closing a screen such as a blind, a curtain or a shade.

[0002]

[Prior art]

 Conventionally, as a blind opening / closing device like the above-mentioned example, for example, by manually pulling down a plurality of lifting cords hanging from the right end of the bottom rail, the inside of the lock case fixed to the end on the same side. The stopper roller is moved up and down by the cam member, and at the same time, the stopper roller is forcibly inserted between the roller receiving surface formed inside the lock case and the guide roller pivotally supported at the lower part of the same position. There is a blind opening / closing device that holds and locks the stopper roller and the guide roller on the opposite peripheral surfaces to lock and unlock the opening / closing position of the blind (see Japanese Utility Model Publication No. 3-28709).

[0003]

[Problems to be solved by the device]

 However, in the blind opening / closing device described above, since the guide rollers and the stopper rollers bearing inside the lock case sandwich and fix each of the plurality of lifting cords, the lifting cord made of synthetic fiber such as polyester or tetron is used. When used, the surface resistance that occurs at the contact area between each roller and each lifting cord is small, and when a load is applied to the blind, each roller and each lifting cord slip and the open / close position of the blind is displaced. I have a problem.

Further, by engraving the knurled surface on the outer peripheral surface of the guide roller and the stopper roller, it is possible to increase the surface resistance generated at the contact portion between each roller and each lifting cord. There is a problem that the biting force required for fixing the position of the blind cannot be obtained because the biting amount of each roller with respect to the lifting cord is shallow.

In view of the above problems, the present invention allows a plurality of lifting cords to bite into the plurality of lifting cords by engaging the biting teeth of each of the holding rollers that are opposed to each other inside the lock unit. It is an object of the present invention to provide a screen opening / closing device that is firmly bite-in and fixed and that can securely fix the opening / closing position of the screen.

[0006]

[Means for Solving the Problems]

 The invention is to open and close a screen in which each biting tooth of the same shape is continuously engraved on the outer peripheral surface of each of the above-mentioned nipping rollers, and the pitch interval of each biting tooth engraved on each of the nipping rollers is set to the same. It is a device.

[0007]

[Action]

 In this invention, by manually pulling down a plurality of lifting cords hanging from one end of the box-type rail, the holding rollers bearing inside the lock unit at the end of the rail are unlocked. And relative to the lock fixed position. In other words, by moving one of the holding rollers to the unlocked position, the holding rollers supported inside the lock unit are separated from each other, and the opening / closing position of the screen can be variably adjusted. Also, by moving one of the holding rollers to the lock fixing position, the biting teeth of each holding roller bearing inside the lock unit bite into each of the multiple lifting cords, firmly fixing the open / close position of the screen. can do.

[0008]

[Effect of device]

 According to this invention, in order to cause the biting teeth of each of the holding rollers, which are bearings facing each other inside the lock unit, to bite into each of the plurality of lifting cords, the lifting / lowering unit formed of synthetic fiber such as polyester or Tetlon is used. Even if it is a cord, it can be securely bitten and fixed. Moreover, as the multiple lifting cords are pulled by the weight of the screen, the biting teeth of each holding roller bite deeply into the multiple lifting cords. A stronger fixing force is obtained than holding and fixing each lifting cord with the roller, and even if a load is applied to the screen, each holding roller and each lifting cord do not slip, and the opening and closing position of the screen Can be reliably fixed.

[0009]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings. The drawing shows a blind opening / closing device used for opening / closing a blind as an example of a screen. In FIG. 1, the blind opening / closing device 1 includes a plurality of blind opening / closing devices that are suspended from the right end of a box-shaped rail 2. The lifting cords 3 are pulled down to raise and lower the blind 4 in the opening / closing direction, and the lock unit 5 fixed to the right end of the box-shaped rail 2 is used to move the pulling positions of the plurality of lifting cords 3 ... Lock and unlock the lock. In addition, the tilt pole 6 connected to the left end of the box-shaped rail 2 is pivotally operated to variably adjust the light shielding angle of the blind 4.

Each of the above-mentioned lifting cords 3 ... Drops a plurality of lifting cords 3 ... at predetermined intervals in the longitudinal direction on the lower surface side of the box-type rail 2, and the lifting cords 3 ... Are fixed to the lower ends of blinds 4 suspended from the lower part of the box-type rail 2. On the other hand, the elevating cords 3 are respectively circulated around a plurality of guide rollers 7 disposed inside the box type rail 2 so that the other ends of the elevating cords 3 ... The lock units 5 fixed to the right end are respectively inserted. In addition, a plurality of lifting cords 3 ... Hanging under the lock unit 5 are bundled together and connected to the opening / closing cord 8, and the other end of the opening / closing cord 8 is fixed to the lower end of the blind 4. ing.

In the blind 4, the plurality of ladder cords 9 ... Are hung at a predetermined interval in the longitudinal direction of the lower surface of the box-type rail 2, and a large number of slats are provided between the ladder cords 9. 4a are installed so as to be separated at equal intervals in the vertical direction. A tilt pole 6 is rotatably connected to the left end of the box-shaped rail 2, and the ladder cords 9 ... Are wound in the light-shielding direction and the daylighting direction by rotating the tilt pole 6. The light-shielding angle of each of the slats 4a constituting 4 is variably adjusted.

As shown in FIG. 2 and FIG. 3, the lock unit 5 described above is configured such that the left and right divided cases 5a and 5b made of synthetic resin are fitted and fixed to each other, and the upper center of each of the cases 5a and 5b is fixed. A guide roller 10 and a gripping roller 11 are axially supported at a predetermined front-to-back interval so as to be orthogonal to the plurality of lifting cords 3 ... Between the wall surfaces, and sandwiched between the upper wall surfaces on the rear end side of the cases 5a and 5b. The stepped roller locking portion 12 is formed so as to face the rear peripheral surface of the roller 11, and the stepped locking surface 12a which is inclined toward the rear lower end of the roller locking portion 12 is formed. There is.

In addition, a movable metal fitting 13 having a U-shaped cross section is pivotally supported vertically between the lower central wall surfaces of the cases 5a and 5b in the direction of pulling down the plurality of lifting cords 3 ... The support pin 14 is inserted between the upright side pieces 13a, 13a of the movable fitting 13, and the left and right ends of the support pin 14 are engaged with the lower central wall surfaces of the cases 5a, 5b, respectively. The movable metal fitting 13 is pivotally supported about 14 as a fulcrum so as to be vertically swingable, and the position of the movable metal fitting 13 is restricted between a locked position and an unlocked position by an alternation mechanism 15 described later.

Further, the holding surface 11 of the holding roller 11 axially supported between the upper central wall surfaces of the cases 5a and 5b and the roller locking portion 12 formed between the rear upper side wall surfaces of the cases 5a and 5b. 2a, the holding roller 16 is axially supported between the rear end side upright pieces 13a, 13a of the movable fitting 13 orthogonal to the plurality of lifting cords 3 ... The auxiliary roller 17 is axially supported between the rear end side upright pieces 13a, 13a of the holding roller 13 so as to face the lower peripheral surface of the sandwiching roller 16 and is vertically spaced so that a plurality of elevating cords 3 can be inserted in parallel. The rollers 16 and 17 are pivotally supported.

As shown in FIGS. 6 and 7, each of the above-mentioned holding rollers 11 and 16 forms the holding roller 11 in such a length that it slightly protrudes from between the rear end side upright pieces 13a and 13a of the movable fitting 13. Then, the holding roller 16 is formed in a length dimension that is axially supported between the rear end side upstanding pieces 13a, 13a, and each of the holding roller 16 described later is formed on the outer peripheral surface of the holding roller 11 formed in a small diameter dimension. Triangular biting teeth 11a meshing with the biting teeth 16a are continuously engraved, and the biting teeth 11a of the pinching roller 11 described above are formed on the outer peripheral surface of the pinching roller 16 formed to have a large diameter. Each of the triangular engaging teeth 16a, which mesh with each other, is continuously engraved. Further, the pitch intervals and meshing shapes of the biting teeth 11a ... Engraved on the small-diameter holding roller 11 and the biting teeth 16a ... Engraving on the large-diameter holding roller 16 are set to be the same. The rollers 10, 11, 16 and 17 are made of an appropriate material such as a synthetic resin material and a metal material.

As shown in FIGS. 4 and 5, the above-mentioned alternation mechanism 15 is locked in a support hole 13b formed in the left upright piece 13a of the movable fitting 13 and a swing hole 13c formed in the right upright piece 13a. The pin 18 is inserted, and the left end of the lock pin 18 is vertically movably engaged with a guide groove 19 formed on the center wall surface of the left case 5a, and the lock formed on the center wall surface of the right case 5b. The right end of the lock pin 18 is engaged with the groove 20 so as to be movable up and down and movable back and forth.

The locking groove 20 of the mechanism has a V-shaped guide protrusion 21 formed on the central wall surface of the right case 5b, and has a groove width around the guide protrusion 21 that allows the circular movement of the lock pin 18 described later. The guide wall portions 22 are formed separately from each other, and are locked and fixed when the right end portion of the lock pin 18 is engaged with (a), and unlocked when engaged with (d). That is, if a plurality of lifting cords 3 ... Are pulled down while being bundled into one, the movable metal fitting 13 swings up and down corresponding to the pulling operation of the lifting cords 3 ... The right end portion sequentially orbits only in one direction (counterclockwise in the figure) of (a), (b), (c), (d), (e), and (f). By the first pull-down operation, the lock pin 18 orbits in the order of (a), (b), (c), and (d), and the position is restricted to the unlock position (d), and by the second pull-down operation ( The lock pin 18 orbits in the order of d), (e), (f), and (a) and is restricted to the lock fixing position (a).

On the other hand, when the box-type rail 2 and the lock unit 5 are assembled, the rails 2 a and 2 a formed in the longitudinal direction on the lower surface side of the box-type rail 2 are formed on the outer wall surfaces of the upper portion of the lock unit 5. After being inserted into the insertion grooves 5d, 5d, respectively, through the rail fixing plate 25 to the rail fixing metal fittings 24 locked on the rails 2a, 2a of the box-type rail 2, the lower center surface on the tip side of the lock unit 5 is inserted. The fixing screw 26 inserted through is screwed and fixed.

The illustrated embodiment is configured as described above, and the opening / closing operation of the blind opening / closing device 1 will be described below. First, when the blind 4 is unlocked, the plurality of lifting cords 3 or the opening / closing cords 8 hung at the right end of the box-type rail 2 are directly held by hand and pulled down. The movable fitting 13 pivotally supported inside the lock unit 5 is vertically swung in response to the pulling operation of.

That is, by utilizing the dead weight of the blind 4, the plurality of lifting cords 3 ... Are pulled down while being appropriately tensioned, so that the holding roller 16 and the auxiliary roller pivotally supported by the movable fitting 13 are supported. The lifting cords 3 ... Are pressed against 17 and the movable fitting 13 can be swung in the unlocking direction by pulling down the lifting cords 3.

At the same time, the rocking movement of the movable metal fitting 13 causes the locking pin 18 constituting the alternating mechanism 15 to move in an orbit along the locking groove 20, and as shown in FIG. When the lock pin 18 orbits in the order of a), (b), (c), and (d) and stops moving to the unlock position (d), the movable bracket 13 is unlocked as shown in FIG. Rotation is restricted to the posture, and the biting teeth 11a of the sandwiching roller 11 axially supported on the lock unit 5 side are separated from the biting teeth 16a of the sandwiching roller 16 axially supported on the movable fitting 13 side. , The plurality of lifting cords 3 inserted between the holding rollers 11 and 16 are unlocked, so that the blind 4 can be opened and closed at an arbitrary height.

Next, when the blind 4 is locked and fixed, the plurality of lifting cords 3 ... Or the opening / closing cords 8 are manually pulled down in the same manner as described above, and the movable fitting 13 is vertically swung to alter the alternator. The lock pin 18 forming the mechanism 15 orbits along the locking groove 20 and, as shown in FIG. 5, by the second pulling down operation, (d), (e), (f) and (a) When the lock pin 18 orbits in turn and stops moving to the lock fixing position (a) in order, the movable metal fitting 13 is rotationally regulated in the lock fixing posture and the lock unit 5 side is pivoted as shown in FIG. A plurality of biting teeth 11a of the held holding roller 11 and a plurality of biting teeth 16a of the holding roller 16 pivotally supported on the movable fitting 13 side are meshed with each other, and a plurality of teeth are inserted between the holding rollers 11 and 16. Each lifting code of the book 3 ... is locked and fixed.

That is, the locking surface 12a of the roller locking portion 12 formed on the lock unit 5 side is engaged with each biting tooth 16a of the sandwiching roller 16 pivotally supported on the movable metal fitting 13 side, and the lock unit is locked. The rotation is regulated in the direction in which the biting teeth 16a of the pinching roller 16 pivotally supported on the movable metal fitting 13 side are meshed with the biting teeth 11a of the pinching roller 11 pivotally supported on the 5 side. As shown in FIG. 7, since the holding roller 16 pivotally supported on the movable metal fitting 13 side is regulated to rotate in one direction, the plurality of lifting cords 3 ... Are pulled by the weight of the blind 4 so much. , The engagement amount of the biting teeth 11a, 16a engraved on each of the holding rollers 11, 16 becomes deep, and the plurality of lifting cords 3 ... Are inserted in parallel by the engagement of the respective holding rollers 11, 16 While being forcibly corrected, the biting teeth 11a and 16a of the holding rollers 11 and 16 bite deeply into the plurality of lifting cords 3 to fix the open / close position of the blind 4 firmly.

Further, as shown in FIG. 6, since the sandwiching roller 11 is formed to be longer than the space between the rear end side upright pieces 13a, 13a of the movable fitting 13, when the blind 4 is opened and closed, Even though the plurality of lifting cords 3 ... Inserted between the rear end side upright pieces 13a, 13a of the movable fitting 13 are displaced to the left and right, the inner wall surface of the lock unit 5 holds the plurality of lifting cords 3 ... By being guided to a position corresponding to the outer peripheral surface of the roller 11, it is possible to prevent each of the lifting cords 3 ...

As described above, a plurality of biting teeth 11a of the sandwiching roller 11 axially supported on the lock unit 5 side and a plurality of biting teeth 16a of the sandwiching roller 16 axially supported on the movable metal fitting 13 side are provided. Since the respective elevating cords 3 ... Are bite into the respective elevating cords 3, even the elevating cords 3 formed of synthetic fibers such as polyester and tetron can be surely bite and fixed. Moreover, as the plurality of lifting cords 3 ... Are pulled by the weight of the blind 4, the biting teeth 11a and 16a of the holding rollers 11 and 16 bite deeply into the plurality of lifting cords 3 ... As compared with the conventional device, two rollers are used to hold a plurality of lifting cords 3 ... While holding them, a stronger fixing force can be obtained. Even if a load is applied to the blind 4, each holding roller 11, 16 is held. It is possible to reliably fix the open / close position of the blind 4 without slipping between the lifting cords 3 and the respective lifting cords 3.

In the correspondence between the configuration of the present invention and the above-described embodiment, the screen of the present invention corresponds to the blind 4 of the embodiment, but the present invention is limited to only the configuration of the above-described embodiment. is not.

In the above-described embodiment, the sandwiching roller 11 formed to have a small diameter dimension and the sandwiching roller 16 formed to have a large diameter dimension are configured to bite and fix a plurality of respective elevating cords 3 ... It is also possible to bite and fix a plurality of respective elevating cords 3 with the holding rollers 11 and 16 formed to have dimensions.

[Brief description of drawings]

FIG. 1 is a perspective view showing a blind opening / closing device.

FIG. 2 is a vertical sectional side view showing a fixing operation of a lock unit.

FIG. 3 is a vertical sectional side view showing a lock unit releasing operation.

FIG. 4 is a vertical sectional front view showing a mounting state of the movable metal fitting.

FIG. 5 is an operation explanatory view of an alternate mechanism.

FIG. 6 is a cross-sectional plan view showing a state where a cord is fixed by a holding roller.

FIG. 7 is an enlarged side view of an essential part showing a state where the cord is fixed by a holding roller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Blind opening / closing device 2 ... Box type rail 3 ... Elevating code 4 ... Blind 5 ... Lock unit 11 ... Holding roller 11a ... Biting teeth 13 ... Movable metal fitting 16 ... Holding roller 16a ... Biting teeth

Claims (1)

[Scope of utility model registration request] 1. A plurality of lifting cords hanging down from one end of a box-shaped rail are pulled down, and a pair of sandwiching rollers, which are bearings facing each other inside the lock unit at the end of the rail, are mutually engaged. A screen opening / closing device that presses and holds a plurality of lifting cords inserted between the holding rollers to fix the open / close position of the screen, and has the same shape on the outer peripheral surface of each of the holding rollers. A screen opening / closing device in which each biting tooth is continuously engraved and the pitch interval of each biting tooth engraved on each of the holding rollers is set to be the same.