JP2013217139A - Brake device for shading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake device for a shading device, capable of deceleration in a plurality of stages by one brake device.SOLUTION: A brake device 40 includes: a brake case 42 to be rotated integrally with a take-up pipe 16; a first support shaft 44 and a second support shaft 46 which are relatively rotatable with the brake case 42; and a first blade material 48 provided on the first support shaft and a second blade material 50 provided on the second support shaft 46. The first blade material 48 and the second blade material 50 are switchable between a first state that their positions are separated from each other and a second state that they overlap with each other, and by the relative rotation of the first blade material 48 and the second blade material 50 in the first state and the brake case and the relative rotation of the first blade material 48 and the second blade material 50 in the second state and the brake case, brake force when winding a screen 18 is changed.

Description

  The present invention relates to a brake device for a shielding device.

  As a conventional brake device for a shielding device, a rotary speed reduction device disclosed in Patent Document 1 is known. The rotary speed reducer includes a housing in which a viscous fluid is sealed, a rotor that is rotatably disposed in the housing, and a rotor shaft that protrudes from the housing, and a vicinity of an edge of the rotating body. A vane pivotally attached at one end and rotatable between a position substantially parallel to a direction of flow of the viscous fluid concentric with the rotor shaft in the housing and a position substantially orthogonal to the rotor; the rotor and the housing; The vane rotates to a position substantially orthogonal to the viscous fluid flow resistance by the clockwise or counterclockwise flow concentric with the rotor shaft of the viscous fluid generated by the relative rotation between the two. In addition to enhancing the damper function, the flow of the viscous fluid generated by the relative rotation of the other of the rotor and the housing is concentric with the rotor shaft, and either the clockwise or counterclockwise flow of the vane Rotated to a position parallel, is intended to lower the damper function to reduce the flow resistance of the viscous fluid.

  With this two-stage damper function, when the winding pipe is rotated in the unwinding direction of the screen, the damper function is performed so that the vane is substantially parallel to the flow concentric with the rotor shaft of the viscous fluid. , And the winding pipe can be rotated quickly, while when the winding pipe is rotated in the screen winding direction, the vane is not concentric with the viscous fluid rotor shaft. The damper function is enhanced so that it is in a substantially vertical state, and the screen can be wound up gently.

  By the way, the shielding device brake device, for example, as in the shielding device described in Patent Document 2, reduces the screen winding speed before the final stage of screen winding, and further increases the winding speed in the final stage of screen winding. You may want to use it for two-stage deceleration as you decelerate.

  For this purpose, when a conventional rotary speed reduction device as shown in Patent Document 1 is used, a rotary speed reduction device corresponding to each of the two stages of deceleration is provided, or a viscous fluid is used before the final stage of screen winding. It is conceivable that the rotor shaft is rotated in the direction of decreasing the flow resistance of the rotor, and the rotor shaft is rotated in the direction of increasing the flow resistance of the viscous fluid in the final stage of screen winding. In the former case, a plurality of rotary reduction devices are required, and in the latter case, the rotor shaft must be rotated in both forward and reverse directions while rotating the winding pipe in the same direction, which complicates the mechanism. Therefore, in any case, there is a problem that the cost increases.

JP-A-10-292754 JP 11-311077 A

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a braking device for a shielding device capable of performing multiple stages of deceleration with a single braking device.

In order to achieve the above-described object, the invention according to claim 1 is a braking device for a shielding device that can be connected to a rotating member of the shielding device and can reduce the moving speed of the shielding material.
A brake case filled with viscous material inside,
A support shaft disposed in the brake case and rotatable relative to the brake case;
At least two types of blades provided on the support shaft;
The at least two types of blade members are switchable between a first state separated from each other and an overlapping second state, and at least two types of blade members in the first state and a brake case The braking force is changed by the relative rotation between the brake case and the relative rotation between the at least two kinds of blade members and the brake case in the second state.

  According to a second aspect of the present invention, in the first aspect of the present invention, at least one of the at least two types of blade members forms an opening through which a viscous material can pass.

  According to a third aspect of the present invention, in the invention of the second aspect, at least two types of blade members each form an opening, and when at least two types of blade members are in the second state, the respective openings The part is characterized in that at least a part thereof is not overlapped.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, at least two types of blade members are supported by separate support shafts, and the relative angle between the two support shafts is It can be switched.

  According to a fifth aspect of the present invention, in the invention of the fourth aspect, a connecting member is provided that is slidable between the support shafts, and the connecting member slides the relative angle between the two support shafts. It can be switched.

  The invention according to claim 6 is characterized in that, in the invention according to any one of claims 1 to 5, the two states are switched in accordance with the movement of the shielding material.

  The invention according to claim 7 is a shielding device in which the shielding member can be opened and closed by rotation of the rotating member, and the shielding device brake device according to any one of claims 1 to 6 is connected to the rotating member. is there.

  According to the present invention, since the braking force can be changed by switching at least two kinds of blade materials between the first state and the second state, a braking device having a plurality of stages of braking force can be easily obtained. Can be realized.

  For example, before the final stage of movement of the shielding material, at least two types of blade material and the brake case rotate relative to each other in the first state where the blade material is separated, thereby moving the shielding material with a small brake force. The speed is reduced, and from the final stage of the movement of the shielding material, the blade material is in a second state where the blade material overlaps, and at least two types of blade material and the brake case rotate relative to each other, so that the shielding material is produced with a large braking force. Can be moved while further decelerating.

  At least one of the at least two types of blade material forms an opening through which the viscous material can pass. For example, in the first state, the viscous material flows through the opening of the material that receives the resistance of the blade material. In the second state, the opening can be blocked by the other blade material, so that the resistance of the blade material can be greatly added to the viscous material, and the brake force can be increased. It becomes.

  In addition, since at least two types of blade members each form an opening, in the first state, the viscous body receives the resistance of the blade material but flows through the opening, resulting in a small braking force. In the second state, Since at least a part of the opening is blocked, the viscous body is greatly subjected to the resistance of the blade material, and thus a large braking force can be obtained.

  By switching between the two states according to the movement of the shielding material, the first state can be obtained before the final stage of the movement of the shielding material, and the second state is established from the final stage of the movement of the shielding material. Can be.

It is a front view of the roll screen which can apply the brake device of this invention. It is a fragmentary sectional view showing the inside of the left end part of the winding pipe of FIG. 1, (a) is the state in the middle of winding of a screen, (b) is the state of the final stage of winding, (c) is winding. Each state at the end is shown. It is a sectional side view showing the state of the brake device from the beginning of the winding of the screen to immediately before the final winding stage. It is a sectional side view showing the state of the brake device of the last stage of winding of a screen. It is a sectional side view showing the state of a brake device at the time of completion of winding of a screen. It is a perspective view of a brake device, (a) shows the 1st state and (b) shows the 2nd state, respectively. It is a fragmentary sectional view near a brake device, (a) shows the 1st state and (b) shows the 2nd state, respectively. It is side sectional drawing showing the blade | wing material of a brake device, (a) shows a 1st state, (b) shows a 2nd state, respectively. It is a sectional side view showing the modification of the blade | wing material of a brake device, (a) shows a 1st state, (b) shows a 2nd state, respectively. It is a sectional side view showing the further modification of the blade material of a brake device, (a) shows the 1st state and (b) shows the 2nd state, respectively.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a roll screen as a shielding device to which the brake device of the present invention can be applied. The roll screen 10 is mainly composed of a pair of side plates 14 attached to a set frame 12 fixed to a window frame or the like by a bracket 11 and a winding pipe (rotation supported at both ends rotatably by the pair of side plates 14. Member) 16, a screen (shielding material) 18 having one end connected to the winding pipe 16 and wound around the winding pipe 16 so as to be unwound, and a weight bar 17 attached to the lower end of the screen 18. Similarly, a pulling tool 19 attached to the lower end of the screen 18 is provided.

  A coil spring 20 is accommodated in the winding pipe 16, one end of the coil spring 20 is operatively fixed to the side plate 14, and the other end is operatively fixed to the winding pipe 16. When the take-up pipe 16 is rotated in the screen unwinding direction, the other end of the coil spring 20 rotates integrally with the take-up pipe 16 and accumulated, and the take-up pipe 16 rotates in the take-up direction. When allowed, the take-up pipe 16 is rotated in the take-up direction by the stored force of the coil spring 20 and the screen 18 is taken up. A stopper device 24 is provided in the winding pipe 16 to stop the screen 18 at a desired position by stopping the rotation of the winding pipe 16 against the stored force of the coil spring 20.

  As shown in FIG. 2, in the winding pipe 16, a stopper shaft 28 fixed to the side plate 14 extends in the central axis direction of the winding pipe 16, and one end of a screw shaft 30 is connected to the stopper shaft 28. Has been. Therefore, the screw shaft 30 becomes a fixed shaft, and a moving top 32 is screwed to the screw portion. Since the moving top 32 can rotate integrally with the winding pipe 16, the moving top 32 rotates with the winding pipe 16, and as the winding pipe 16 winds up the screen 18, the screw shaft 30. Move up from one end to the other. A brake device 40 according to the present invention is connected to the other end of the screw shaft 30.

  As shown in detail in FIGS. 3 to 7, the brake device 40 rotates integrally with the take-up pipe 16 and is inserted on a central axis in the brake case 42, and a brake case 42 filled with a viscous body 54 therein. Thus, the first support shaft 44 and the second support shaft 46 that can rotate relative to the brake case 42, the first blade member 48 provided on the first support shaft 44, and the second support shaft 46 provided on the second support shaft 46. A blade member 50 and a connecting member 52 are provided.

  The first support shaft 44 and the second support shaft 46 are disposed concentrically, and the first support shaft 44 is positioned on the center side, and the second support shaft 46 is positioned so as to cover the outer periphery of the first support shaft 44. , Can be rotated relative to each other.

  One end side of each of the first support shaft 44 and the second support shaft 46 is inserted into the brake case 42, and a first blade member 48 and a second blade member 50 are attached to this portion, respectively. The first blade member 48 and the second blade member 50 are arranged radially from the central axis in the brake case 42.

  That is, the first blade member 48 is formed as a pair of plates protruding in the outer diameter direction from the outer peripheral surface of the first support shaft 44 at positions spaced apart from each other by 180 degrees of the first support shaft 44. The blade member 50 is also formed as a pair of plates that protrude from the outer peripheral surface of the second support shaft 46 in the outer diameter direction at positions spaced apart from each other by 180 degrees of the second support shaft 46.

  Two openings 48b and 50b are formed in each of the first blade member 48 and the second blade member 50, and the viscous body 54 can pass through each of the openings 48b and 50b. The positions of the openings 48b and 50b are set so that when the first blade member 48 and the second blade member 50 are overlapped with each other, they are not completely overlapped and are different from each other.

  The first blade member 48 and the second blade member 50 are in a second state where the first support shaft 44 and the second support shaft 46 rotate relative to each other and the first state separated from each other and the second state overlapping each other. be able to. The first state separated from each other can be an angle of a maximum of 90 degrees at which the second support shaft 46 contacts the first blade member 48 as shown in FIG. In the second state where they overlap each other, as shown in FIG. 6 (b), the first blade member 48 and the second blade member 50 have the opening of one blade member closed by the other blade member. Is done.

  The other end side of each of the first support shaft 44 and the second support shaft 46 protrudes outside the brake case 42, and the other end of the first support shaft 44 is a shaft further than the other end of the second support shaft 46. It protrudes in the direction and is fixed to the screw shaft 30. As shown in FIG. 7, a first groove 30a and a second groove 46a are formed at the end of the screw shaft 30 to which the first support shaft 44 is fixed and at the other end of the second support shaft 46, respectively. The first groove 30a extends linearly along the axial direction, and the second groove 46a extends in the axial direction while drawing a gentle curve in the range of 1/4 of the circumferential direction.

  The connection member 52 straddles the end of the screw shaft 30 in which the first groove 30 a is formed and the other end of the second support shaft 46 in which the second groove 46 a is formed, and rotates relative to the screw shaft 30. Although it is impossible, it can move in the axial direction. And the protrusion 52a which protruded from the inner peripheral surface of the connection member 52 to radial direction is inserted in the 1st groove | channel 30a, and the protrusion 52b is inserted in the 2nd groove | channel 46a, respectively. As a result, the second support shaft 46 is coupled to the screw shaft 30 and the first support shaft 44 via the connection member 52. When the connecting member 52 slides on the screw shaft 30, the protrusion 52a slides in the first groove 30a, the protrusion 52b slides in the second groove 46a, and the protrusion 52b moves in the first groove 46a. When sliding from one end, which is the end on the groove 30a side, to the other end, the second support shaft 46 rotates and rotates up to 90 degrees. Thus, when the connecting member 52 slides, the second support shaft 46 rotates relative to the first support shaft 44 whose rotation is restricted with respect to the screw shaft 30.

  On the outer periphery of the second support shaft 46, a spring 56 that urges the connection member 52 in a direction that always separates the brake member 42 from the brake case 42 is provided. It is pushed by the moving top 32 against the urging force and moves on the screw shaft 30 in a direction approaching the brake case 42. Thereby, as described above, the protrusion 52a of the connection member 52 slides in the first groove 30a, and the protrusion 52b slides in the second groove 46a from one end to the other end, and the second support shaft 46 Is rotated 90 degrees relative to the first support shaft 44, and the first blade member 48 and the second blade member 50 are in a second state where they overlap each other. On the other hand, when the moving top 32 is separated from the connection member 52, the connection member 52 slides in a direction away from the brake case 42 by the urging force of the spring 56, and the projection 52a moves to the first groove 30a and the projection 52b moves to the first position. The two grooves 46a are slid. At this time, since the protrusion 52b slides the second groove 46a from the other end portion to the one end portion, the second support shaft 46 rotates relative to the first support shaft 44 by 90 degrees in the opposite direction. Thus, the first blade material 48 and the second blade material 50 are in a first state separated from each other by 90 degrees. The return of the connecting member 52 when the moving top 32 is separated is not limited to the one using the spring 56, and various modes are possible.

  In the brake device 40, the viscous body 54 filled therein also flows in the same direction as the brake case 42 as the brake case 42 rotates due to the rotation of the winding pipe 16, but FIG. 6A and FIG. As shown in a), when the first blade member 48 and the second blade member 50 are in the first state where they are separated from each other by 90 degrees, the viscous material 54 flowing in the brake case 42 is moved to the first blade member 48 and the first blade member 48. The two blade members 50 come into contact with each other, resistance is applied to the viscous body 54, and the flow velocity is reduced. In this first state, the openings 48b and 50b of the first blade member 48 and the second blade member 50 are not blocked, and the viscous body 54 can pass through the openings 48b and 50b. Thereby, the resistance generated between the viscous body 54 and the first blade material 48 and the second blade material 50 is relatively small, and the braking force applied to the brake case 42 by the viscous body 54 is also weak.

  On the other hand, as shown in FIGS. 6B and 8B, when the first blade member 48 and the second blade member 50 are in the second state where they overlap each other, the opening 48b of the first blade member 48 is not The two blade members 50 and the opening 50b of the second blade member 50 are respectively closed by the first blade member 48, and the space in which the viscous body 54 flows is formed by the first blade member 48 and the second blade member 50. Only the opening 58 is a gap formed between the inner peripheral surface of the brake case 42. For this reason, the resistance generated between the viscous body 54 and the blade members 48 and 50 increases, and the braking force applied to the brake case 42 by the viscous body 54 becomes strong.

  The operation of the roll screen 10 including the brake device 40 configured as described above will be described.

  When the pulling tool 19 attached to the lower end of the screen 18 is pulled and the screen 18 is unwound from the winding pipe 16, the winding pipe 16 rotates and the screen spring 18 is stored while the spring reaction force is stored in the coil spring 20. It goes down. During the lowering operation, as shown in FIG. 2A, the moving top 32 and the connecting member 52 are separated from each other, and the connecting member 52 is biased by the spring 56 so that the protrusion 52b is one end of the second groove 46a. It is held so as to be located in the part. Thereby, the 1st blade material 48 and the 2nd blade material 50 hold | maintain the 1st state separated 90 degree | times from each other, and the viscous body 54, the 1st blade material 48, and the 2nd blade material 50 are as mentioned above. The resistance generated between them is relatively small, and the braking force applied to the brake case 42 by the viscous body 54 is also weak. For this reason, since the brake force transmitted to the winding pipe via the brake case 42 is also weak, the operation load for lowering the screen 18 does not become heavy. Thus, after the screen 18 is lowered to a desired height and then the stopper device 24 is operated, the winding pipe 16 is prevented from rotating against the stored force of the coil spring 20 and the screen 18 stops.

  Next, when the screen 18 is raised, the stopper device 24 is released, and the winding pipe 16 is rotated in the winding direction by the stored force of the coil spring 20 to wind up the screen 18. At this time, since the brake device 40 operates, the winding speed of the winding pipe 16 is reduced.

  That is, since the brake case 42 of the brake device 40 rotates in the winding direction integrally with the winding pipe 16, the viscous body 54 in the brake case 42 also flows in the winding direction. On the other hand, as shown in FIG. 2 (a), from the beginning of winding to immediately before the final winding stage, the moving top 32 moves on the screw shaft 30 toward the brake device 40, so Since the contact member 52 is not in contact, the connecting member 52 is held in a position by the urging force of the spring 56 so that the protrusion 52b is positioned at one end of the second groove 46a as shown in FIG. The first blade member 48 and the second blade member 50 maintain the first state 90 degrees apart from each other, and are generated between the viscous body 54 and the first blade member 48 and the second blade member 50 as described above. The resistance to be applied is relatively small, and the braking force applied to the brake case 42 by the viscous body 54 is also weak. Accordingly, since the braking force transmitted to the winding pipe 16 via the brake case 42 is weak, the winding pipe 16 winds up the screen 18 at a slightly reduced winding speed.

  Next, as shown in FIGS. 2 (b) and 4, when entering the final winding stage, the moving top 32 comes into contact with the connecting member 52, but the moving top 32 continues to rotate the winding pipe 16 thereafter. Accordingly, the screw moves on the screw shaft 30 and moves together with the connecting member 52 while pressing the connecting member 52 toward the brake case 42 against the biasing force of the spring 56. As the connecting member 52 slides, the protrusion 52b slides in the second groove 46a from one end portion to the other end portion, and the second support shaft 46 rotates as the protrusion 52a slides. 50 rotates in a direction overlapping the first blade member 48.

  At the end of winding shown in FIG. 2 (c), as shown in FIG. 7 (b), the protrusion 52a slides to the other end of the second groove 46a, and FIG. 5, FIG. 6 (b) and FIG. As shown in FIG. 8B, the second blade material 50 is in a second state where it overlaps with the first blade material 48. In this state, as described above, the opening 48b is closed by the second blade member 50 and the opening 50b is closed by the first blade member 48, and the space where the viscous material 54 flows is the opening portion 58. Therefore, the resistance generated between the viscous body 54 and the first blade material 48 and the second blade material 50 is increased, and the braking force applied to the brake case by the viscous body 54 becomes strong. Therefore, the braking force transmitted to the winding pipe 16 via the brake case 42 is also strong, and the winding speed of the winding pipe 16 can be greatly reduced at the end of winding. Thereby, the impact sound and impact force caused by the weight bar 17 colliding with the winding pipe 16 at the end of winding of the screen 18 can be reduced.

  Thus, by changing the relative position (angle) relationship between the first blade member 48 and the second blade member 50, the braking force can be changed, and before the final stage of screen winding of the roll screen and before the screen winding. The braking force suitable for each stage in the final stage can be obtained.

  9A and 9B show modifications of the first blade material 48 and the second blade material 50. FIG. In this example, the first blade member 48 and the second blade member 50 are provided with four notches 48c and 50c at substantially the same position on the side end portions in addition to the openings 48b and 50b. The notches 48 c and 50 c form an opening together with the inner peripheral surface of the brake case 42. Thereby, since the viscous body 54 can flow through the notches 48c, 50c in addition to the openings 48b, 50b, 58, the first blade member 48, the second blade member 50, and The resistance generated with the viscous body 54 is reduced, and the braking force of the brake device 40 can be weakened. The braking force can be finely adjusted by increasing or decreasing the number of the notches 48c and 50c or changing the size.

  FIGS. 10A and 10B show another modification of the first blade member 48 and the second blade member 50. In this example, instead of providing the openings 48b and 50b shown in FIGS. 8 and 9 in the first blade member 48 and the second blade member 50, a notch 48d having the same size as that in FIG. 50d is formed, and an opening is formed together with the inner peripheral surface of the brake case 42. When the first blade member 48 and the second blade member 50 are in the second state, the notches 48d and 50d are closed by the second blade member 50 and the first blade member 48, respectively.

  In the above embodiment, the openings are configured to be completely closed in the second state, but only a part of the openings is closed, and the size of the closed part is set. You may make it change brake force by changing.

  Also, the size and number of openings can be changed variously.

  Moreover, in the said embodiment, although the number of blade materials was made into 4 sheets and the kind was made into 2 types, it is not limited to this, You may increase the number and types of blade materials further.

  In the above embodiment, the brake case 42 rotates integrally with the rotating member 16 and the first support shaft 44 is fixed. However, the present invention is not limited to this, and the first support shaft 44 is not limited thereto. Can rotate integrally with the rotating member 16, and the brake case 42 can be fixed.

  In the above-described embodiment, the relative angle between the first support shaft 44 and the second support shaft 46 is always fixed by the connection member 52. However, the present invention is not limited to this, and at least one of the first support shaft 44 and the second support shaft 46 is not limited thereto. The support shaft of the first blade member 48 and the second blade member 50 can be determined by the viscous body 54 with the support shaft of the first support member 52 being free. In the above embodiment, the first support shaft 44 is always fixed, and the rotation angle of the second support shaft 46 can be switched. However, the present invention is not limited to this, and one support in the first state. The relative angle between the first blade member 48 and the second blade member 60 may be determined by the viscous body 54 with the shaft fixed and the other support shaft fixed in the second state.

  Further, in the above embodiment, the braking force is small in the first state where the blade material is separated and the braking force is large in the second state where the blade material overlaps, but this is not a limitation. By forming the opening of the blade material at the same position, in the first state where the blade material is separated, the viscous body 54 comes into contact with the plurality of blade materials, so that the braking force increases and the blade material overlaps. In the state 2, it is also possible to configure the brake force to be reduced by integrating a plurality of blade members.

  In the above-described embodiment, the roll screen has been described as an example. However, the present invention can be applied to any shielding device such as a horizontal blind as long as it has a configuration in which the shielding material is opened and closed by the rotation of the rotating member.

16 Winding pipe (rotating member)
18 Screen (shielding material)
40 Brake device 42 Brake case 44 1st support shaft 46 2nd support shaft 48 1st blade | wing material 48b, 50b Opening part 48c, 50c, 48d, 50d Notch (opening part)
50 Second blade member 52 Connection member 54 Viscous material

Claims (7)

A shielding device brake device (40) that can be connected to the rotating member (16) of the shielding device and can reduce the moving speed of the shielding material (18),
A brake case (42) filled with a viscous body (54);
A support shaft (44, 46) disposed in the brake case and rotatable relative to the brake case;
At least two types of blade members (48, 50) provided on the support shaft (44, 46);
The at least two types of blade members are switchable between a first state separated from each other and an overlapping second state, and at least two types of blade members in the first state and a brake case The braking device for the shielding device is characterized in that the braking force is changed by the relative rotation between the brake case and the relative rotation between the at least two kinds of blade members and the brake case in the second state.   The at least one blade material of at least two types of blade materials forms an opening (48b, 50b, 48c, 50c, 48d, 50d) through which a viscous body can pass. Brake device for shielding device.   3. At least two types of blade members each form an opening, and when at least two types of blade members are in the second state, at least a part of each opening is not overlapped. The brake device for shielding apparatuses as described.   The shielding device according to any one of claims 1 to 3, wherein at least two types of blade members are respectively supported by separate support shafts, and the relative angles of the two support shafts are switchable. Brake device.   5. A connecting member (52) slidable between the supporting shafts is provided, and the connecting member can switch the relative angle between the two supporting shafts by sliding. Brake device for shielding device.   The braking device for a shielding device according to any one of claims 1 to 5, wherein the two states are switched according to the movement of the shielding material.   The shielding member (18) can be opened and closed by rotation of the rotating member (16), and the shielding member brake device according to any one of claims 1 to 6 is connected to the rotating member (16). .