JP4704772B2 - blind - Google Patents

Description

  The present invention relates to a blind including a shielding material and an operation unit that performs a lifting operation of the shielding material.

  In general, the blind is operated by operating the operating member, and the operating force is transmitted to the rotating shaft that is rotatably supported, and the rotating shaft is rotated to wind or unwind the shielding material. Alternatively, the lifting / lowering cord attached to the lower end of the shielding material is wound or unwound so that the shielding material can be raised and lowered. In this case, the rotating shaft body can directly wind or unwind the shielding member or the lifting / lowering cord, or indirectly wind or unwind.

  In order to secure the operation amount of the operation member corresponding to the lifting / lowering amount of the shielding material, the operation member is often configured to be endless with a certain length and is usually suspended from the blind support member located above. ing. Therefore, the operator often gets lost in the operation direction, and there is a possibility that the part of the operation member suspended from the blind support member may be caught by people, pets, furniture, etc., and the appearance may be impaired. is there.

  For example, a sheet winding and unwinding device described in Patent Document 1 has been proposed as a device that can be configured compactly. However, there is no device that can be practically used.

Japanese Examined Patent Publication No. 63-46224

  This invention is made | formed in view of this subject, and it aims at providing the blind which can keep an operation member compact at the time of non-operation.

In order to achieve the above-described object, the invention according to claim 1 is a blind including a shielding material and an operation unit that performs an elevating operation of the shielding material.
The operation unit includes a rotatable pulley, an operation member having one end coupled to the pulley so as to be wound and unwound, a spring that constantly biases the operation member in a direction to be wound around the pulley, and an operation member And a stopper that divides the operating member into a winding portion wound and unwound by the pulley and a gripping portion that can be gripped by the operator , the winding portion being a pulley of the operating member. The gripping part is the part from the part suspended from the stopper of the operating member to the other end of the operating member, and the stopper is wound more than the winding part of the operating member on the pulley. By restricting the gripping, repeating the pulling operation of the gripping part and unwinding and winding of the winding part, the shielding material is raised or lowered and the shielding material is pulled by a predetermined amount of pulling operation of the gripping part. Either rising or falling And performing better.

  The invention according to claim 2 is characterized in that the stopper according to claim 1 is provided on an operation member.

  According to a third aspect of the present invention, in the second aspect, the gripping portion and a winding portion that can be wound around a pulley separately from the gripping portion are connected via the stopper. The blind according to claim 2.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the stopper is provided with an accommodating portion, and the holding portion can be wound around the pulley separately from the holding portion in the accommodating portion. The winding unit is connected to the winding unit.

  According to a fifth aspect of the present invention, when a force of a predetermined value or more acts on the gripping part according to any one of the first to fourth aspects, the gripping part is an operating member that can be wound from a stopper or a pulley. It is separated from the winding unit.

  According to a sixth aspect of the present invention, in the one according to any one of the first to fifth aspects, the spring exerts a biasing force in the winding direction on the pulley in a state where the winding of the operating member is restricted by the stopper. It is set to a torque that can be applied.

  According to the present invention, since the pulley can wind up the operation member by the biasing force of the spring at the time of non-operation, the operation member can be kept compact, and a person, pet or furniture is prevented from being caught by the operation member. can do. Since the operation of the operation member is always limited to the direction in which the operation member is unwound from the pulley, the operator can easily and quickly operate without hesitation about the operation direction.

  By restricting the winding amount of the operation member around the pulley by the stopper, it is possible to prevent the operation member from being excessively wound around the pulley and reaching the operation member. And the drooping length from the pulley of the operating member can be set to an appropriate length by the stopper.

  The stopper can be provided on any member. According to the invention described in claim 2, by providing the stopper on the operation member, the winding portion capable of winding the operation member around the grip portion and the pulley with the stopper as a boundary. And can be divided into

  According to invention of Claim 3 or 4, it becomes possible to cancel | release the connection of a winding part and a holding part, and to adjust or replace the length of a holding part suitably according to the installation location of a blind. .

  According to the fifth aspect of the present invention, when a large force is applied to the gripping part during operation, the gripping part is detached from the stopper or the winding part, thereby preventing a large load from acting on the spring. It is possible to prevent damage to the mechanism part including the.

  According to the sixth aspect of the present invention, even when the winding of the operating member is restricted by the stopper, the pulley tries to wind the operating member by the urging force in the winding direction from the spring. Thus, the operating member can be wound around the pulley until the winding is reliably regulated by the stopper.

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

  FIG. 1 is an overall front view of a blind according to an embodiment of the present invention. In the figure, a blind is a roll screen 10, and a pair of support plates 14 attached to a set frame 12 fixed to a setting surface such as a window frame, and a rotation supported rotatably with respect to the pair of support plates 14. A winding pipe 16 that is a shaft body, a screen 18 that is one end connected to the winding pipe 16, and is suspended from the winding pipe 16 so as to be wound and unwound, and one end of the winding pipe 16 And an operation unit 20 provided between the support plate 14 and the one support plate 14. One end of the take-up pipe 16 is pivotally supported by a support shaft 22 that extends from the support plate 14 into the take-up pipe 16.

  The operation unit 20 and the take-up pipe 16 are connected through a first clutch mechanism 24, and the take-up pipe 16 and the support shaft 22 are connected through a second clutch mechanism 26. Further, a brake 28 that decelerates the rotation of the winding pipe 16 is provided in the winding pipe 16. Hereinafter, detailed configurations of the operation unit 20, the first clutch mechanism 24, and the second clutch mechanism 26 will be described with reference to FIGS.

  As shown in FIG. 2 to FIG. 5, the operation unit 20 has an operation case 30 that is fixed to the support plate 14 by a stopper (not shown), a fixed shaft 32 that is fixed to the support plate 14, and a fixed shaft 32. A pulley 34 rotatably supported, an operation member 36 having one end coupled to the pulley 34 so as to be wound and unwound, and one end fixed to the fixed shaft 32, located on the inner diameter side of the pulley 34. A mainspring spring 38 as an urging member whose other end is fixed to the pulley 34 and a stopper 44 for restricting winding of the operation member 36 around the pulley 34 by a predetermined amount or more are provided.

  Specifically, the operation member 36 includes a winding cord (winding portion) 40 that is directly wound around the pulley 34, a gripping cord (gripping portion) 42 whose upper end is tied to the lower end of the winding cord 40, and a gripping cord And an operation knob 43 attached to the lower end of 42. The cords 40 and 42 may be in the form of an elongated string or a thin tape.

  The stopper 44 is provided at a knot between the winding cord 40 of the operation member 36 and the gripping cord 42, and includes a storage portion 44 a that stores a knot between the lower end of the winding cord 40 and the upper end of the gripping cord 42. The diameter is larger than 40 and 42.

  The operation member 36 is inserted through the opening 30a formed in the lower part of the operation case 30 and moves in and out of the operation case 30, but the stopper 44 is in contact with the opening 30a and cannot pass through the opening 30a. Therefore, the winding of the operation member 36 around the pulley 34 is restricted by a predetermined amount. For this reason, the portion of the gripping cord 42 is always suspended below the operation case 30 so that the operator can always reach the gripping cord 42. However, the hanging length when the gripping cord 42 is not operated is such that the appearance of the blinds is kept good and a person, pet, furniture, etc. are not caught.

  The torque of the mainspring spring 38 may be set to such an extent that a biasing force in the winding direction can be applied to the pulley 34 even when the stopper 44 is in contact with the opening 30a.

  The pulley 34 is engaged with a rotating body 48 shown in FIG. 3B, and an input shaft 50 that extends inwardly of the winding pipe 16 is integrally projected from the rotating body 48. The first clutch mechanism 24 rotates together with the input shaft 50, the switching guide 52 on the outer peripheral side of the input shaft 50 and capable of rotating relative to the input shaft within a predetermined rotation angle range, and the switching guide 52. The engaging member 54 is guided by the switching guide 52 so as to be movable in the radial direction, and the output shaft 56 is disposed outside the switching guide 52 and coupled to one end of the winding pipe 16. The rotation in one direction is transmitted to the winding pipe 16, but the rotation in the other direction of the pulley 34 is not transmitted to the winding pipe 16, and the rotation from the winding pipe 16 is not transmitted to the pulley 34. Hereinafter, the configuration will be described.

  As shown in FIG. 6, the input shaft 50 includes a plurality of (three) concave grooves 50a spaced apart at equal intervals in the circumferential direction on the peripheral surface, and a plurality (three) of ribs 50b protruding in the radial direction. Are formed alternately. A plurality of (three) cutout grooves 52a and cutout long grooves 52b are formed in the switching guide 52 so as to correspond to the concave grooves 50a and the ribs 50b at equal intervals in the circumferential direction. The rib 50b is inserted into the notch long groove 52b with play in the circumferential direction in the notch long groove 52b.

  A cylindrical engagement element 54 is fitted in each notch groove 52 a of the switching guide 52. A plurality (9) of concave grooves 56 a are formed on the inner peripheral surface of the output shaft 56. The engaging element 54 is movable in the radial direction in the notch groove 52a, and is retracted into the recessed groove 50a of the input shaft 50 according to the relative angular relationship between the switching guide 52 and the input shaft 50, and the output. It is possible to switch to a state in which the shaft 56 protrudes into the recessed groove 56a.

  On the output shaft 56, a clutch case 60 that extends further to the inner back side of the winding pipe 16 is integrally projected. The second clutch mechanism 26 includes the clutch case 60, a slider 62 that rotates together with the clutch case 60, a clutch drum 64 that restricts the movement of the slider 62, and a clutch spring 66 that allows the clutch drum 64 to rotate in only one direction. And.

  As shown in FIG. 7, a concave groove 60a extending in the axial direction is formed inside the clutch case 60, and a part of the slider 62 is fitted in the concave groove 60a so as to be movable in the axial direction. In addition, the clutch drum 64 is formed with a guide groove 64 a that guides the movement of the slider 62 by fitting the remaining portion of the slider 62. As shown in FIG. 8, the guide groove 64a has one endless endless groove part 64b and two branching groove parts 64c branched from the endless groove part 64b. A portion 64e and a stop portion 64d are formed. The clutch spring 66 is wound around the support shaft 22, and one end is connected to the clutch drum 64.

  The operation of the blind configured as described above will be described.

  In a state where the screen 18 is stopped by the action of the second clutch mechanism 26, the weight of the screen 18 acts on the output shaft 56 via the winding pipe 16, and the clutch case 60 integrated with the output shaft 56. The fitted slider 62 is located at the stop portion 64d. The slider 62 tries to rotate the clutch drum 64 in the rotation direction corresponding to the descending direction of the screen 18 by the stop portion 64d. However, the clutch drum 66 is inhibited from rotating by the clutch spring 66 being fastened. The pipe 16 is connected to the support shaft 22 and maintains a stopped state.

  As for the operation member 36, the winding cord 40 is wound around the pulley 34, the stopper 44 is in contact with the operation case 30, and only the gripping cord 42 is suspended from the operation case 30 (see FIG. 9 (a)).

  For example, when the screen 18 is to be lowered from this state, the operator pulls the grip cord 42 of the operation member 36 by a predetermined amount (FIG. 9B). Then, the winding cord 40 of the operation member 36 is unwound from the pulley 34 and pulled out of the operation case 30, and the pulley 34 rotates in the unwinding direction.

  When the pulley 34 rotates, the rotation is transmitted to the rotating body 48 with a slight delay and transmitted to the input shaft 50 of the first clutch mechanism 24. When the input shaft 50 rotates, the switching guide 52 rotates, and the output shaft 56 rotates through the engagement element 54.

  At this time, in the second clutch mechanism 26, the slider 62 starts from the stop portion 64d of the clutch drum 64 and moves to the endless groove portion 64b by the rotation of the clutch case 60 integrated with the output shaft 56. When the operator releases his hand from the gripping cord 42 in this state, the pulley 34 is rotated in the winding direction of the winding cord 40 by the mainspring spring 38. The rotation of the pulley 34 is transmitted to the input shaft 50 through the rotating body 48, but when the input shaft 50 rotates with respect to the switching guide 52, the engagement element 54 retracts into the concave groove 50 a of the input shaft 50. Therefore, the connection between the input shaft 50 and the output shaft 56 is released (FIG. 9C).

  As a result, the output shaft 56 is disconnected from the pulley 34 and the support shaft 22 by the first clutch mechanism 24 and the second clutch mechanism 26. The pulley 34 is rotated by the mainspring spring 38 in the winding direction of the winding cord 40, the winding pipe 16 is rotated in the unwinding direction of the screen by the weight of the screen 18, and the pulley 34 and the winding pipe 16 are independent in the same direction. Each rotate. When the pulley 34 winds the winding cord 40 as much as possible and the stopper 44 comes into contact with the operation case 30, the pulley 34 stops, but the output shaft 56 and the winding pipe 16 continue to rotate. Thus, the screen 18 descends by its own weight while being decelerated by the brake 28, and stops when reaching the lower limit position (FIG. 9 (d)).

  Next, in order to raise the screen 18, the operator continues to pull the grip cord 42 of the operation member 36 (FIG. 10A (a)). Then, the winding cord 40 of the operation member 36 is unwound from the pulley 34 and pulled out of the operation case 30, and the pulley 34 rotates in the unwinding direction.

  When the pulley 34 rotates, the rotation is transmitted to the rotating body 48 with a slight delay and transmitted to the input shaft 50 of the first clutch mechanism 24. When the input shaft 50 rotates relative to the switching guide 52, the engaging member 54 protrudes, connects the input shaft 50 and the output shaft 56, and the output shaft 56 rotates via the engaging member 54.

  At this time, in the second clutch mechanism 26, the rotation of the clutch case 60 integrated with the output shaft 56 causes the slider 62 to enter the branch groove portion 64c from the endless groove portion 64b of the clutch drum 64 and move to the locking portion 64e. In the locking portion 64e, the slider 62 tries to rotate the clutch drum 64 in the rotation direction corresponding to the screen ascending direction, and the clutch drum 64 is allowed to rotate as the clutch spring 66 relaxes.

  As a result, the rotation from the pulley 34 is transmitted to the output shaft 56 by the first clutch mechanism 24, and the connection from the support shaft 22 is released by the second clutch mechanism 26, and the winding pipe is rotated in accordance with the rotation of the pulley 34. 16 rotates in the screen winding direction, and the screen 18 rises.

  Since the length of the winding cord 40 of the operating member 36 is limited, when the hand is pulled out and released, the winding cord 40 is wound around the pulley 34 by the mainspring spring 38 (FIG. 10A (b)). That is, the pulley 34 rotates in the winding direction of the winding cord 40, and the rotation of the pulley 34 is transmitted to the input shaft 50 through the rotating body 48, and the input shaft 50 rotates with respect to the switching guide 52. As a result, the engaging element 54 is retracted into the concave groove 50a of the input shaft 50, so that the connection between the input shaft 50 and the output shaft 56 is released, so that the winding cord 40 of the pulley 34 in the winding direction is retracted. The rotation is not transmitted to the output shaft 56. Further, in the second clutch mechanism 26, the slider 62 moves from the locking portion 64e to the stop portion 64d by the dead weight of the screen 18, and the winding pipe 16 and the support shaft 22 are connected and stopped.

  In order to continue the ascending operation of the screen 18, the winding cord 40 pulls out the operation member 36 wound around the pulley 34 again and repeats the operations shown in FIGS. The screen 18 can be raised to a height. By repeating the pulling-out operation of the operation member 36, the screen 18 can be raised to the upper limit position (FIGS. 10B (e) and (f)).

  As described above, the operation member 36 is pulled out from the pulley 34 only when the operation is performed. However, when one operation is finished, the operation member 36 is immediately wound by the mainspring spring 38, and thus the operation member 36 hangs down for a long time. In addition, it is possible to prevent a person, pet or furniture from being caught by the operation member 36. Since only the gripping cord 42 hangs down by the stopper 44, the operation member 36 is not excessively wound and the operation member 36 cannot be reached. Even in the state where the winding of the operation member 36 is restricted by the stopper 44, the urging force in the winding direction from the mainspring spring 38 acts on the pulley 34. The operation member 36 can be reliably wound around the pulley 38 until it is restricted.

  Further, since the operation of the operation member 36 is always limited to the direction in which the operation member 36 is unwound from the pulley 34, the operator can easily and quickly operate without hesitation about the operation direction.

  By adjusting the position of the stopper 44 and the length of the gripping cord 42, the hanging length of the gripping cord 42 can be appropriately adjusted. Further, the grip cord 42 can be easily replaced by removing the grip cord 42 from the stopper 44.

  In this embodiment, since the winding cord 40 and the gripping cord 42 are separate, in an emergency, the gripping cord 42 is separated from the winding cord 40 or the stopper 44 and detached. (See FIG. 11). That is, when excessive force is applied by excessively pulling the gripping cord 42, the knot of the gripping cord 42 or a part of the stopper 44 that is connected to the knot of the gripping cord 42 is connected to the stopper 44. In order to detach | leave from the accommodating part 44a using elasticity, it can prevent that a heavy load acts on the mainspring spring 38, and can prevent the failure | damage of the mechanism part containing the mainspring spring 38. FIG.

  However, optionally, the winding cord 40 serving as the winding unit and the gripping cord 42 serving as the gripping unit can be integrated instead of separate, and the winding unit and the gripping unit are separated by the stopper 44. It is also possible. In this embodiment, the knot between the winding cord 40 and the gripping cord 42 is accommodated in the stopper 44. However, the winding cord 40 and the gripping cord 42 can be coupled to the stopper 44 separately.

  In this embodiment, the stopper 44 is provided on the operation member 36. However, the present invention is not limited to this, and the stopper 44 can be provided at any position / member such as the operation case 30 side. When the stopper 44 is provided on the operation member 36, it can be divided into a winding part and a gripping part with the stopper 44 as a boundary.

  In this embodiment, a roll screen is used as the blind. However, the present invention is not limited to this, and the present invention can be applied to any blind such as a horizontal blind, a roman shade, and a pleated screen. Moreover, although this embodiment demonstrated the case where it applied to the roll screen of the type which a screen descend | falls with dead weight, the type which always energizes a winding pipe in a screen winding direction with the winding spring incorporated in a winding pipe. The same applies to a roll screen. In that case, the screen can be raised by pulling the operation member 36 by a predetermined amount, and the screen can be lowered by continuing to pull the operation member 36.

It is the whole blind front view concerning a 1st embodiment of the present invention. FIG. 2 is a half sectional view of one end of the blind of FIG. 1. FIG. 2 is a half cross-sectional view mainly showing an operation unit of the blind of FIG. 1. FIG. 2 is a half sectional view mainly showing a first clutch mechanism and a second clutch mechanism of the blind of FIG. 1. It is a side view of the blind of FIG. 1, and is the state by which the winding cord was wound up. It is a side view of the blind of FIG. 1, and is the state in which the winding cord was unwound. It is sectional drawing seen along the 6-6 line of FIG. 3B. It is sectional drawing seen along the 7-7 line of FIG. 3B. It is an expanded view of a clutch drum. It is the side view showing the operation | movement of a blind in case a screen is lowered | hung, and a FIG. 6 equivalent view. It is the side view showing the operation | movement of a blind in the case of raising a screen, and a FIG. 6 equivalent figure. It is a continuation of FIG. 10A. It is a side view of a blind when excessive force acts on a grip cord.

Explanation of symbols

10 Roll screen 18 Screen (shielding material)
20 Operating section 34 Pulley 36 Operating member 38 Mainspring spring (spring)
40 Winding cord (winding part)
42 Grip cord (gripping part)
44 Stopper 44a receiving part

Claims (6)

In a blind provided with a shielding material (18) and an operation unit (20) for raising and lowering the shielding material,
The operation unit urges the rotatable pulley (34), an operation member (36) whose one end is coupled to the pulley so as to be wound and unwound, and the operation member is always wound around the pulley. The operating member is divided into a spring (38), a winding part (40) provided in the middle of the operating direction of the operating member , wound around and unwound by a pulley , and a gripping part (42) that can be gripped by the operator. And a winding part is a part from one end connected to the pulley of the operating member to the stopper, and a gripping part is a part suspended from the stopper of the operating member to the other end of the operating member. The stopper restricts the winding of the operating member beyond the winding portion of the operation member to the pulley, and repeats the pulling operation of the gripping portion (42) and the unwinding and winding of the winding portion (40). Either rise or fall of the material (18) It was carried out, with a predetermined amount of pulling operation of the grip portion (42), blind and performs raising and the other one of the descent of the shield member (18).   The blind according to claim 1, wherein the stopper is provided on an operation member.   The blind according to claim 2, wherein the grip portion and a winding portion (40) that can be wound around a pulley separately from the grip portion are connected via the stopper.   A receiving portion (44a) is provided inside the stopper, and the gripping portion and a winding portion (40) that can be wound around a pulley separately from the gripping portion are connected in the receiving portion. The blind according to claim 2.   5. The gripping part is detached from a winding part of an operation member that can be wound around a stopper or a pulley when a force of a predetermined value or more is applied to the gripping part. Blinds as described in the section. The said spring is set to the torque which can give the urging | biasing force of a winding direction to a pulley in the state in which winding of the operation member was controlled by the stopper. Blind as described in.

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