JP2552854B2 - Vertical blind slatt controller - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of a device for rotating and opening and closing a slat of a vertical blind by a single operation means such as a chain.

[Prior Art] A device for rotating and opening and closing a slat by simply pulling a chain hanging from one end of a vertical blind head box is known from Japanese Examined Patent Publication No. 52-9422. The vertical blind is provided with a case at one end of the head rail, and the rotation shaft of the blind and the ends of the opening / closing shaft of the blind are pivotally supported by the case. A drive shaft for directly driving the chain is borne in the case, a feed screw is partially provided on the drive shaft, and a moving gear is screwed onto the feed screw. When the blind is open and the chain is pulled to one side, the moving gear moves on the feed screw while meshing with the first driven gear. At this time, the first driven gear rotates the rotating shaft of the blind in a direction in which the slats turn about 90 degrees in one direction. As the moving gear moves, it disengages from the first driven gear and then meshes with the first intermediate gear. The first intermediate gear moves the blind rotation shaft about the slats in the opposite direction.
Rotate in the direction of turning 180 degrees. Then, the moving gear is disengaged from the meshing with the first intermediate gear and the meshing slat with the second driven gear is made orthogonal to the opening / closing axis. Then, the moving gear is disengaged from the feed screw and the clutch is inserted to rotate the opening / closing shaft to close the blind. After the blind is closed to the desired state, pulling the chain backwards reverses the above action, allowing the slats to turn to the desired angle.

[Problems to be Solved by the Invention] In the conventional device, the moving gear meshes with or disengages from the first and second driven gears, but at this time, the edges of the gears are mutually damaged or the edges are chipped. Was easy to get up. Further, since two intermediate shafts are supported in the case in addition to the rotary shaft, the opening / closing shaft, and the drive shaft, the structure is complicated and the case becomes large. Furthermore, since the slat must be rotated in two directions before the blind is opened and closed in order to always move the slat orthogonally to the longitudinal direction of the head rail, the blind cannot be opened and closed quickly.

[Means for Solving Problems] The present invention has been made to solve the above problems, and an object of the present invention is that the structure is simple and can be accommodated in a small case. It is to provide a control device capable of quick opening and closing.

In order to achieve the above-mentioned object, means for characterizing the present invention are, as shown in FIG. 1, a drive shaft for receiving rotational drive of a ball chain 16 or the like in a case 14 provided at one end of a head rail 10, and a rotary shaft. 12 and the shaft ends of the opening / closing shaft 13 are supported, and the rotary gear 20 and the opening / closing gear 21 are fixed to both ends of the shaft,
A drive shaft 15 is formed from a hollow shaft portion 30 that is rotationally driven and a grooved shaft portion 31 that is fitted in the hollow shaft portion 30 so as to be mutually slippable, and the grooved shaft portion has a mountain portion 43 at an equal pitch angle in a transverse cross section. Tanibe 44
A spring 33 having a central portion fixed to the end surface on the opposite side of the head rail 10 of the grooved shaft portion 31 and free ends at both ends is provided, and the hollow shaft portion 30 is provided between the ends 35, 35 of the spring. The grooved shaft portion 31 is formed by inserting the protruding portion 36, and engaging the protruding portion 36 to restrict the slip angle range of the grooved shaft portion 31 with respect to the hollow shaft portion 30.
And the feed screw 24 is formed on the central peripheral surface of the hollow shaft portion 30, and the moving gear 18 is screwed onto the feed screw to open and close the gear.
21 and the protrusions 22a and 22b on both sides of the moving gear 18.
Is provided, and stoppers 22a, 23b engageable with the protrusions are provided on the drive shaft 15, and the rotary drive gear is always meshed with the rotary gear 20.
19 is fitted in the hollow shaft portion 30, and a convex portion 41 and a concave portion 42 are formed on the inner peripheral surface of the rotary drive gear at a pitch angle equal to that of the crest portion 43 and the trough portion 44 of the grooved shaft portion 31. On the peripheral surface of the rotary drive gear 19 of which the key hole 39 is formed at a pitch angle equal to the crest portion 43 of the grooved shaft portion 31.
A ball-shaped or roll-shaped key 38 into and out of the key hole, and when the grooved shaft portion 31 slips with respect to the hollow shaft portion, the key 38 retracts and the rotary drive gear 19 moves into the hollow shaft. Department
I tried to slip on 30.

[Operation] While the drive shaft 15 is stopped, as shown in FIG. 6, the projecting portion 36 is clamped by both ends 35 of the spring 33, and the crest portion 43 of the grooved shaft portion 31.
Is located directly under the key hole 39, as shown in FIG.
38 projects into the recess 42 of the rotary drive gear 19. Therefore,
When the drive shaft 15 is pulled to one side by a ball chain or the like, the protruding portion 36 of the pulley 17 causes the grooved shaft portion 31 to move into the hollow shaft portion via the spring 33.
Since the rotary drive gear 19 is rotated together with the hollow shaft 30,
And the rotary gear 20 is rotated to rotate the rotary shaft 12. Further, the moving gear 18 on the feed screw 24 of the hollow shaft portion 30 meshes with the opening / closing gear 21, but since the sliding resistance of the feed screw 24 of the moving gear 18 is smaller than the rotation resistance of the opening / closing shaft 13, the hollow shaft portion With the rotation of 30, the moving gear 18 slides on the feed screw 24 without rotating. When the slat reaches the limit of rotation in one direction, that is, the position parallel to the longitudinal direction of the head rail,
The protrusion 22a or 22b of the moving gear 18 intersects with the stopper 23a or 23b, but since the rotation resistance of the opening / closing shaft 13 is set to be larger than the elastic resistance of the spring 33, the moving gear 18 does not rotate and has a groove. The shaft 31 slips as shown in FIG. When the grooved shaft part 31 slips by a half pitch angle of the crest part 43, the trough part 44 comes directly under the key hole 39, so that the key 38 recedes from the peripheral surface of the hollow shaft part 30, as shown in FIG. To enter. As a result, the rotary drive gear 19 stops without receiving the rotary drive of the hollow shaft portion 30.

On the other hand, the moving gear 18 on the feed screw 24 moves without rotating until it hits the stopper 23a or 23b while meshing with the opening / closing gear 21, and when the movement is blocked by the stopper, the moving gear 18 rotates together with the hollow shaft portion 30 to open / close the gear. 21 and the opening / closing shaft 13 are turned to move the slats. When the movable gear 18 moves from one stopper to the other stopper, the rotary drive gear 19 that rotates integrally with the hollow shaft portion 30 is set so as to rotate the slat from one rotation limit to the other rotation limit by half. Open / close shaft 13
When rotating in either direction, the rotating shaft 12 rotates after reaching the rotation limit. That is, the opening and closing movement is started after the slat has rotated to the rotation limit.

As described above, since the device of the present invention is substantially composed of only one drive shaft, the structure is simple and compact, but since the slat does not rotate 180 degrees or more, the blind can be quickly rotated and opened / closed. be able to. The slats move in a state parallel to the longitudinal direction of the head rail, but the width of the slats is always set to be larger than the maximum spacing of the slats, so all the slats at the time of movement overlap the ends in the same direction and are neatly arranged. Moving. Therefore, there is no problem when the slats move in a state parallel to the longitudinal direction of the head rail.

[Embodiment] An apparatus of the present invention will be described based on an embodiment shown in the drawings.

As shown in FIGS. 1 and 2, a case 14 is provided at one end of the head rail 10, and a rotary gear 20 and an open / close gear 21 are fixed to one ends of the rotary shaft 12 and the open / close shaft 13 in the case. . The rotating shaft 12 and the opening / closing shaft 13 extend in the head rail 10 in parallel with the longitudinal direction, and the gears of the runners 25 rotate integrally with the rotating shaft, but are slidably fitted to each other. The gear meshes with a gear that is integral with the vertical axis 29 of each runner 25. Since the slats 11 are hung on the vertical shaft 29, when the rotating shaft 12 rotates, all the slats rotate at the same time. The opening / closing shaft 13 is a screw with a large lead, and only the leading runner is screwed onto the opening / closing shaft 13. Since each runner 25 is sequentially connected through the spacer 26, when the opening / closing shaft 13 rotates in one direction, the leading runner pulls the other runners to close the blinds, and when the turning shafts rotate in the opposite direction, the leading runners push the blinds to push the blinds. open.

A rotary gear 20 and an open / close gear 21 are attached to the shaft ends of the rotary shaft 12 and the open / close shaft 13.
Is fixed. A drive shaft 15 is supported by the case 14, a pulley 17 is fixed to one end of the drive shaft, and a ball chain 16 is hung on the pulley. A feed screw 24 is provided on a part of the drive shaft 15, and a moving gear 18 is screwed onto the feed screw, and the moving gear meshes with an opening / closing gear 21. Drive shaft 15
A rotary drive gear 19 is provided on the other end side of the rotary drive gear, and the rotary drive gear meshes with the rotary gear 20.

As shown in FIGS. 3 and 4, in the case 14 adjacent to the head rail 10, protrusions are formed on both side surfaces of the moving gear 18.
22a or 22b is provided, and stoppers 23a and 23b are provided on both sides of the feed screw 24 of the drive shaft 15.

As shown in FIG. 5, the drive shaft 15 comprises a stepped hollow shaft portion 3 which rotates integrally with the pulley 17, and a grooved shaft portion 31 which is rotatably inserted into the hollow shaft portion 3. A limiting plate 32 and a coil spring 33 are attached to the end of the grooved shaft portion 31 on the pulley side,
As shown in the figure, both ends 35, 35 of the coil spring 33 project into the fan-shaped opening 34 of the constant plate 32, and the projecting portions 36 of the pulley 17 between the both ends 35, 35 are inserted. The lead screw 24 is attached to the center of the hollow shaft 30.
Is formed, and the female screw of the shaft hole of the moving gear 18 is fitted to the feed screw. As shown in FIG. 7, an opening 37 having a central angle of about 120 degrees is opened in the peripheral surface of the hollow shaft portion 30 on both sides of the feed screw 24, and stoppers 23a and 23b are inserted through the opening 37 to form a grooved shaft. Planted in part 31. The rotary drive gear 19 is attached to the side of the hollow shaft portion 30 opposite to the pulley via a roll-shaped key 38 that can freely move in and out. As shown in FIG. 8, the rotary drive gear 19
The inner periphery of the is 120 degrees pitch angle, consisting of three convex portions 41 in contact with the peripheral surface of the hollow shaft portion 30 and three concave portions 42 that create a void,
The key 38 is fitted into three key holes 39 formed on the peripheral surface of the hollow shaft portion 30 at a pitch angle of 120 degrees. The cross section of the grooved shaft portion 31 inside the hollow shaft portion 30 has a pitch angle of 120 degrees and three crests 4
3 and the valley portion 44, when the crest portion 43 comes under the key hole 39, the key 38 projects from the peripheral surface of the hollow shaft portion 30 and engages with the convex portion 41 of the rotary drive gear 19, so that the rotary drive is performed. The gear 19 rotates integrally with the hollow shaft portion 30, but when the trough portion 44 of the grooved shaft portion 31 comes under the key hole 39, the key 38 is retracted from the peripheral surface of the hollow shaft portion 30,
The rotary drive gear 19 slips on the hollow shaft portion 30. Protrusion 22
When the stopper 23a or 23b hits a or 22b, the grooved shaft portion 31 slips with respect to the hollow shaft portion 30 as shown in FIG. The range of the slip angle is restricted to 60 degrees by the limiting plate 32. When the grooved shaft portion 31 slips, as shown in FIG. 10, the key 38 that has coupled the rotary drive gear 19 to the hollow shaft portion 30 withdraws, so that the rotary drive gear 19 rotates the hollow shaft portion 30. Stop without being driven. Moving gear 18 is stopper 23
When the sliding is blocked by a or 23b, the movable gear rotates together with the drive shaft 15 in the direction in which the pulley 17 is rotated by the ball chain 16.

As shown in FIG. 11, the retaining ring 46 and the runner at the endmost
It is desirable that a friction runner 45 be mounted between the two and frictionally engage with the opening / closing shaft 13 so that the rotation resistance of the opening / closing shaft 13 is made larger than the elastic resistance of the coil spring of the hollow shaft portion. The friction runner 45, as shown in FIG.
A step hole 47 through which the opening / closing shaft 13 penetrates is opened, and a rotor 48 that meshes with a screw of the opening / closing shaft 13 is rotatably inserted into the step hole. Wave washers 49 or spring washers are arranged on both sides of the rotor 48. The cover 50 is screwed to seal the step hole 47 to prevent the rotor 48 and the wave washer 49 from falling off. Since the friction runner 45 is sandwiched between the fixed ring 46 and the end runner 25, the friction runner 45 cannot move even if the opening / closing shaft 13 rotates. Therefore, the rotor 48 rotates together with the opening / closing shaft 13, but both sides of the rotor 48 come into contact with the wave washer 49, so that the opening / closing shaft 13 receives a relatively large frictional resistance. Greater than elastic resistance. The rotation resistance can be adjusted by changing the wave washer 49.

 Next, the operation of the device of the present invention will be described.

Pulling the ball chain 16 in the direction in which the blind closes causes the pulley 17 to rotate and the protrusion 36 of the pulley to be a coil spring.
Since the end portion 35 of 33 is pushed, the grooved shaft portion 31 rotates together with the hollow shaft portion 30. At this time, the crest portion 43 of the grooved shaft portion 31 is below the key hole 39, and the rotary drive gear 19 is connected to the hollow shaft portion 30 via the key 38.
Since they are rotated together, the rotary gear 20 and the rotary shaft 12 rotate and the slats 11 turn to one side. However, when the slat 11 approaches one turning limit that is substantially parallel to the head rail 10, the stopper 23b hits the protrusion 22b and the rotation of the grooved shaft portion 31 is blocked. When rotation of the grooved shaft portion 31 is blocked, the ninth
As shown in the figure, the grooved shaft portion 31 slips with respect to the hollow shaft portion 30. When the slip angle becomes 60 degrees, as shown in FIG. 10, the trough portion 44 of the grooved shaft portion 31 comes under the key hole 39 and the roll 38 falls in the trough portion, so that the rotary drive gear 19 is The hollow shaft portion 30 stops without being rotationally driven. In this way, the slat 11 rotates to one turning limit, but no more.

On the other hand, the moving gear 18 moves on the feed screw 24 without meshing with the open / close gear 21 until it is blocked by the stopper 23b, but when the movement is blocked by the stopper, it rotates together with the drive shaft 15. The open / close gear 21 and open / close shaft that mesh with it
13 rotates to move slats 11 in the direction of closing the blinds. When the operation of the ball chain 16 is stopped, the spring force of the coil spring 33 again causes the mountain portion of the grooved shaft portion 31 to move under the key hole 39.
43 is coming. That is, when both the hollow shaft portion 30 and the grooved shaft portion 31 stop or rotate, the stoppers 22a and 22b are always in the state shown in FIG.

Then, when the ball chain 16 is pulled in the opposite direction, that is, the direction in which the blind is opened, the rotary drive gear 19 and the drive shaft 15 are reversely rotated together, so that the rotary gear 20 and the rotary shaft 12 are slats 11.
Invert. While this slat 11 flips 180 degrees,
The moving gear 18 moves from the position where it engages with the stopper 23b to the feed screw 2
4 Move up to a position where it engages with the stopper 23a. Slat 11 rotates 180 degrees from one turning limit and head rail 1
When approaching the other turning limit, which is almost parallel to the longitudinal direction of 0,
The projection 22a and the stopper 23a intersect to cause the grooved shaft portion 31 to slip. When the slip angle reaches 60 degrees, the key 38 falls into the trough portion 44 of the grooved shaft portion 31, and the rotary drive gear 19 stops. Then, since the stopper 23a blocks the movement of the moving gear 18, the moving gear 18 rotates integrally with the drive gear 15 to rotate the rotating gear.
Reverse 21 and open / close shaft 13. Therefore, the slat 11 moves in the direction in which the blind opens.

Thus, when the device of the present invention pulls the ball chain 16 on the one hand, for example in the closing direction of the blind, the slat 11 first rotates to one turning limit which is substantially parallel to the longitudinal direction of the headrail 10 and then closes the blind. Move to the direction and pull backwards, first, the slat 11 will be the head rail.
Since the blinds move in the opening direction after rotating to the other turning limit which is almost parallel to the longitudinal direction of 10, the slats 11
The angle of turning before opening and closing is less than 180 degrees, enabling quick opening and closing of the blinds.

Further, since there is only one drive shaft 15, the structure is simple and compact, and the gears do not disengage from each other or engage again, so that the gears are not worn or damaged.

[Effects of the Invention] As described above, since the device of the present invention substantially has only one drive shaft provided in the case, compared to a device that requires two intermediate shafts in addition to the conventional drive shaft. And the structure is remarkably simple and compact. Further, in the conventional device, the gear is likely to be damaged because the gear meshes with or disengages from other gears, but the device of the present invention does not disengage from each other because the gears remain meshed and do not disengage from each other. It has an excellent effect that trouble due to breakage does not occur. Furthermore, in the conventional device, the slat cannot be opened and closed without rotating the slat by 180 degrees or more, but since the device of the present invention rotates the slat before it is opened and closed by 180 degrees or less, a quick operation of the blind is possible. The special effect of becoming

[Brief description of drawings]

1 and 2 are a front view and a plan view showing a notched part of a vertical blind equipped with a device of an embodiment of the present invention, and FIG. 3 is a cross section taken along line III-III of FIG. Fig. 4, Fig. 4 is a sectional view taken along the line IV-IV of Fig. 3, Fig. 5 is a sectional view of the drive shaft of Fig. 1, and Figs. 6, 7, and 8 are respectively sectional views of Fig. 5. VI-VI line,
Sectional views taken along line VII-VII and line VIII-VIII, FIGS. 9 and 10 are views corresponding to FIGS. 6 and 8 when the hollow shaft portion and the grooved shaft portion slip, and FIG. Is a view corresponding to FIG. 4 of another embodiment, and FIG. 12 is an exploded perspective view of the friction runner of FIG. In the figure, reference numeral 10 is a head rail, 11 is a slat, 12 is a rotary shaft, 13 is an opening / closing shaft, 14 is a case, 15 is a drive shaft, 16 is a ball chain, 17 is a pulley, 18 is a moving gear, and 19 is a rotary drive gear. , 20 is a rotary gear, 21 is an opening / closing gear, 22a and 22b are protrusions, 23a and 23b are stoppers, 24 is a feed screw, 25 is a runner,
26 is a spacer, 29 is a vertical shaft, 30 is a hollow shaft portion, 31 is a grooved shaft portion, 32 is a limiting plate, 33 is a coil spring, 34 is a fan-shaped opening, 35 is a free end, 36 is a protruding portion, and 37 is an opening. , 38 is a key, 39 is a key hole, 41 is a convex part, 42 is a concave part, 43 is a concave part, 43 is a peak part, 44 is a valley part, 45 is a friction runner, 46 is a fixing ring, 47 is a step hole, 48 is a rotor, 49 is a Wave washers are shown respectively.

Claims (5)

(57) [Claims] 1. A head rail (10), a large number of runners (25) movably provided on the head rail, spacers (26) for connecting the runners in sequence and restricting a maximum distance, and each runner. A vertical shaft (29) half-rotatably attached to the vertical shaft, a slat (11) suspended on the vertical shaft, and two parallel rotary shafts (12) supported by the head rail and extending in the longitudinal direction thereof. An opening / closing shaft (13); a case (14) attached to one end of the head rail; a rotating gear (20) fixed to the shaft end of the rotating shaft and the opening / closing shaft protruding into the case; An opening / closing gear (21) and a drive shaft (15) that is rotatably driven by the case are provided. The rotating shaft engages with a gear mechanism in the runner to rotate the vertical shaft to open and close the open / close gear. The shaft is screwed to engage the top of the runner. Is a control device configured to move it along the head rail so that the rotation of the drive shaft is selectively transmitted to the rotary gear and the open / close gear, and the drive shaft is a hollow that receives rotational drive. Shaft (3
0) and a grooved shaft portion (31) fitted in the hollow shaft portion so as to be mutually slippable, and a mountain portion (43) at an equal pitch angle on the outer periphery of the grooved shaft portion on the head rail side. A valley (44) is formed, a central portion is fixed to the grooved shaft portion, and a coil spring (33) having both free ends is provided, and a protruding portion integrated with the hollow shaft portion is provided between both ends of the coil spring. (36) is arranged, a feed screw (24) is provided on the peripheral surface of the hollow shaft portion, and opening portions (37) equal to the pitch angle of the crest portion are provided on both sides of the feed screw, and a stopper ( 23a, 23b) is planted in the grooved shaft portion, and a moving gear (18) which always meshes with the opening / closing gear is screwed into the feed screw, and projections (22a) engaging with the stopper are provided on both sides of the moving gear. , 22b), and the rotary drive gear (1
9) is externally fitted, and a protrusion (41) and a recess (42) are formed on the inner circumference of the rotary drive gear at the same pitch angle as the peaks and valleys,
A key hole (39) is formed in a portion of the hollow shaft portion where the rotary drive gear is externally fitted at the same pitch angle as that of the mountain portion, and a key (38) is fitted into the key hole so that the key (38) can be inserted and removed. When the drive shaft is rotated, the drive gear that rotates together with the hollow shaft portion rotates the rotary shaft by the key that projects from the opening, and the feed screw causes the protrusion of the moving gear to engage with the stopper. Until it does, it slides in the axial direction without rotating, but when the protrusion engages with the stopper, the grooved shaft part slips with respect to the hollow shaft part, and the key retracts into the opening. In order to
The vertical blind slat control device characterized in that the drive gear stops, and at the same time, the moving gear rotates together with the hollow shaft portion to rotate the opening / closing gear. 2. The vertical blind slat control device according to claim 1, wherein the key (39) fitted in the key hole (38) is a ball or a roll. 3. A stopper (23a) having a movable gear (18) on one side.
To the other stopper (23b) on the feed screw (24) and the rotation speed of the drive shaft (15) and the rotary drive gear (1
9. The vertical blind slat control device according to claim 1, wherein the number of rotations of the drive shaft when the slat (11) is half-turned by 9) is set to the same value. 4. The grooved shaft portion (31) is integrally provided with a limiting plate (32) engageable with the protruding portion (36) to adjust the slip angle range of the grooved shaft portion with respect to the hollow shaft portion (30). The slat control device for a vertical blind according to claim 1, characterized in that it is regulated. 5. A friction runner (45) is mounted between a fixing ring (46) for fixing the outermost runner and the outermost runner, and a step hole (47) through which an opening / closing shaft (13) of the friction runner passes. A rotor (4
8) and the wave washer (4
9. The slat control device for a vertical blind according to claim 1, characterized in that a spring washer is fitted coaxially.