JP6641136B2 - blind - Google Patents

Description

  The present invention relates to blinds.

  Conventionally, blinds have been provided with an operation device (operation unit) for performing a lifting operation of a shielding material. Japanese Patent Application Laid-Open Publication No. H11-133873 discloses an operating unit for raising and lowering a shielding material, a rotatable pulley, an operating member having one end connected to the pulley so that the operating member can be wound and unwound, and an operating member constantly wound around the pulley. A spring for urging the operating member on the pulley, and a stopper for restricting winding of the operating member onto the pulley by a predetermined amount or more. A grip is disclosed.

  According to this, since the pulley can wind up the operating member by the biasing force of the spring when not operating, the operating member can be kept compact, and the occupant can be occupied because the operating member is not looped. It can be prevented from being caught. Further, 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 operate the operation member without hesitation in the operation direction. Further, by restricting the amount of winding of the operation member around the pulley by the stopper, there is a feature that it is possible to prevent the operation member from being excessively wound around the pulley and the operator from reaching the operation member.

JP 2006-241693 A

  By the way, in the technology disclosed in Patent Document 1, a spring is provided which constantly biases the operation member in a direction in which the operation member is wound around the pulley in order to wind the operation member around the pulley. However, during operation, this spring comes into contact with the pulley or operating case, or the spirally wound springs themselves come into contact with each other, causing frictional resistance. There is a possibility of causing malfunction such as no operation.

  In view of the above circumstances, an object of the present invention is to provide a blind capable of preventing a malfunction of a pulley.

  To achieve the above object, a blind according to one embodiment of the present invention includes a shielding member and an operation unit. The operation unit raises and lowers the shielding material according to a user's lifting operation. The operation unit has an operation case, an operation member, a spring, and a sliding portion. The operation case houses a rotatable pulley. The operating member has one end connected to the pulley so as to be able to be wound and unwound, and hangs down from the operating case. The spring biases the operation member in a direction in which the operation member is wound on the pulley or in a direction in which the operation member is unwound from the pulley. The sliding portion is provided in the operation case, and comes into contact with the spring to slide the spring at the time of winding or unwinding.

  Accordingly, in the blind, when the operation member is wound or unwound, the sliding portion facilitates the operation of the spring, thereby preventing the pulley from malfunctioning.

  The sliding portion may have a contact surface designed to have a dimension that allows the spring to always contact the spring from the most contracted state to the most extended state of the spring.

  Thus, the blind can always smoothly operate the spring from the state where the operation member is most wound to the state where the operation member is most unwound.

  The sliding portion may be a resin washer provided on at least one of two side surfaces of the spring in the rotation axis direction of the pulley in the operation case.

  As a result, the blind uses a resin washer as the sliding part, thereby avoiding inconveniences such as seepage of lubricant from the case and generation of viscosity when using lubricant for smooth operation of the spring. Meanwhile, the operation of the spring can be smoothed. Here, PTFE (polytetrafluoroethylene), PE (polyethylene), nylon, or the like may be used as the resin.

  The sliding portion may be a resin inner surface of the operation case, which is in contact with at least one of the two side surfaces of the spring in the rotation axis direction of the pulley.

  Accordingly, the blind can smoothly operate the spring without providing a separate member by using the inner surface of the operation case that directly contacts the spring as the sliding portion.

  The sliding portion may be a resin sheet provided on a contact surface between the springs in a winding direction or an unwinding direction of the spring in the operation case.

  In this way, the blind uses the resin sheet as the sliding part, thereby avoiding inconveniences such as oozing out of the case of the lubricant and generation of viscosity when using the lubricant to smooth the operation of the spring. Meanwhile, the operation of the spring can be smoothed. In this case, the resin sheet may be fixed to the contact surface between the springs by coating or the like, or may be simply provided in the gap between the springs.

  The resin washer may be provided between the inner surface of the operation case and the spring so that the uneven portion formed on the inner surface of the operation case is not exposed to the spring side.

  Thus, even if the blind has unevenness such as a step or a gap at a joint portion between components for forming the operation case, the resin washer prevents the unevenness from being exposed to the spring side. Can be prevented from being caught and the operation of the spring being hindered.

  As described above, according to the present invention, operation failure of the pulley can be prevented. However, such effects do not limit the present invention.

It is a perspective view of the blind concerning one embodiment of the present invention. It is a partial transmission front view of the above-mentioned roll screen. It is sectional drawing of the operation unit of the said roll screen. It is AA sectional drawing of FIG. It is a perspective view showing an example of a sliding member which the above-mentioned operation unit has. It is the perspective view which showed the mode of the screen raising / lowering operation | movement of the said roll screen. It is the perspective view which showed the mode of the screen raising / lowering operation | movement of the said roll screen. It is the perspective view which showed the mode of the screen raising / lowering operation | movement of the said roll screen. It is the perspective view which showed the mode of the screen raising / lowering operation | movement of the said roll screen. It is the perspective view which showed the mode of the screen raising / lowering operation | movement of the said roll screen. It is the perspective view which showed the mode of the screen raising / lowering operation | movement of the said roll screen. It is the perspective view which showed the mode of the screen raising / lowering operation | movement of the said roll screen. It is sectional drawing of the operation unit before and behind the screen raising / lowering operation | movement of the said roll screen. It is a side view of the operation unit before and after the screen raising / lowering operation of the said roll screen. It is the side view which showed the part other than the operation unit before and behind the screen raising / lowering operation | movement of the said roll screen. It is a side view which shows the other example of the sliding member which the said operation unit has. It is a side sectional view showing other examples of the sliding member which the above-mentioned operation unit has.

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

[Roll screen configuration]
FIG. 1 is a perspective view of a roll screen as a blind according to the present embodiment. FIG. 2 is a partially transparent front view of the roll screen.

  As shown in these drawings, the roll screen 100 according to the present embodiment includes a support member 1, a screen 2, a winding pipe 3, and an operation unit 4.

  As shown in both figures, the support member 1 supports the winding pipe 3 rotatably. As shown in FIG. 2, the support member 1 has a set frame 11. The support member 1 is installed by fixing the set frame 11 to a predetermined surface such as a window frame or a wall via a bracket 1b with a screw or the like. A pair of side plates 1 a is attached to both side surfaces of the set frame 11.

  As shown in FIG. 1, both ends of the winding pipe 3 are rotatably supported by a pair of side plates 1 a in front of the set frame 11. On the other hand, as shown in FIG. 2, by changing the support angle of the winding pipe 3 with respect to the pair of side plates 1 a, the winding pipe 3 is configured such that both ends thereof are positioned below the set frame 11 by the pair of side plates 1 a. It is rotatably supported. The change of the support angle of the winding pipe 3 is appropriately selected according to a method of fixing the winding pipe 3 to a window frame, a wall, or the like. One end (the right side in both figures) of the winding pipe 3 is supported by a support shaft 30 extending from the side plate 1a to the inside of the winding pipe 3.

  The screen 2 functions as a shielding material, one end of which is connected to the winding pipe 3, and is suspended by the winding pipe 3 so as to be wound and unwound.

  A weight bar 5 is attached to the lower end of the screen 2. The lower end of the screen 2 is fixed inside the weight bar 5, but the lower end may be sewn around the weight bar 5.

  A take-up spring 31 is housed in the take-up pipe 3. One end of the take-up spring 31 is indirectly fixed to the left side plate 1 a in both figures, and the other end is taken up via a first brake 32. It is fixed to the pipe 3.

  When the take-up pipe 3 is rotated in the unwinding direction of the screen 2, the other end of the take-up spring 31 is rotated integrally with the take-up pipe 3 to accumulate energy and rotate the take-up pipe 3 in the take-up direction. Is permitted, the winding pipe 3 is rotated in the winding direction by the accumulated force of the winding spring 31, and the screen 2 is wound while being constantly decelerated by the first brake.

  Further, a second brake 33 for reducing the winding speed of the screen 2 from the final stage of winding the screen 2 is provided in the winding pipe 3. The second brake 33 is indirectly fixed via the operation unit 4 to the right side plate 1a in both figures.

  While the first brake 32 operates continuously from the initial stage of winding of the screen 2, the second brake 33 functions as an auxiliary brake of the first brake in the final stage of winding. That is, if only the first brake 32 is used, the winding speed of the screen is increased in the final stage of winding the screen 2, and the impact sound and the impact force by the weight bar 5 become excessive when completely wound. In the final stage of winding, the second brake 33 operates to decelerate the winding pipe 3, thereby reducing the impact sound and the impact force.

  The first clutch mechanism 34 is provided between the winding pipe 3 and the operation unit 4, and transmits the rotation of a pulley (described later) of the operation unit 4 to the winding pipe 3 or cancels the transmission. Or

  The second clutch mechanism 35 connects and disconnects the winding pipe 3 and the support shaft 30 at one end of the winding pipe 3.

  The operation unit 4 raises and lowers the screen according to a user's lifting operation. The operation unit 4 is connected to the winding pipe 3 via a first clutch mechanism 34. Hereinafter, details of the operation unit 4 will be described.

[Configuration of operation unit]
FIG. 3 is a cross-sectional view of the operation unit 4 in the front direction, and FIG. 4 is a cross-sectional view taken along line AA of FIG.

  As shown in FIGS. 1 to 4, the operation unit 4 has an operation member 40 and an operation case 45. The operation member 40 includes a grip 41, an operation code 42, a pawl 43, a stopper 44, and a winding code 49 in this order from the lower end.

  The grip 41 is a part that is gripped and operated by the user, and the upper end of the operation cord 42 is connected to the lower end of the take-up cord 49 in the operation case 45 and hangs down. The pole 43 prevents the grip 41 and the operation cord 42 from jumping up and being taken up by the take-up pipe 3 together with the screen 2 when the screen suddenly rises (for example, when the user vigorously releases the grip 41). It is provided for

  The stopper 44 locks the operation cord 42 at a predetermined position so that the user cannot reach the grip 41 due to the operation cord 42 being excessively wound up. Further, as shown in FIGS. 3 and 4, the stopper 44 accommodates a knot between the lower end of the winding cord 49 and the upper end of the operation cord 42.

  3 and 4, the operation case 45 is fixed to the side plate 1a. In the operation case 45, a fixed shaft 48 also fixed to the side plate 1a, a pulley 46 rotatably supported on the fixed shaft 48, and one end connected to the pulley 46 so as to be wound and unwound. A winding cord 49 to be wound and a mainspring 47 as an urging member having one end fixed to the fixed shaft 48 and the other end fixed to the pulley 46 are provided on the inner diameter side of the pulley 46.

  The fixed shaft 48 has an axial length short enough to support the pulley 46. The support shaft 30 of the winding pipe 3 passes through the fixed shaft 48 concentrically, and the support shaft 30 and the fixed shaft 48 cannot be rotated relative to each other.

  A plurality of engaging projections 46a are formed on the end face of the pulley 46 on the winding pipe 3 side and are circumferentially separated along a circular locus. Each engagement protrusion 46a is engaged with a plurality of engagement holes 91 (see FIG. 9) provided in the first clutch mechanism 34 so as to correspond to the engagement protrusion 46a.

  The first clutch mechanism 34 transmits the rotation in one direction from the pulley 46 to the winding pipe 3, but does not transmit the rotation in the other direction of the pulley 46 to the winding pipe 3, and also rotates the rotation from the winding pipe 3. It is configured not to transmit to the pulley 46.

  That is, when the pulley 46 is rotated in the unwinding direction by a user operation on the operation unit 4, the winding pipe 3 rotates in the unwinding direction via the first clutch mechanism 34. When the pulley 46 is rotated in the unwinding direction by a predetermined amount by the above operation, the second clutch mechanism 35 releases the connection between the winding pipe 3 and the support shaft 30, and the winding pipe 3 rotates in the winding direction. .

  Further, when the pulley 46 is rotated in the unwinding direction by the above operation and the winding pipe 3 is rotated in the unwinding direction via the first clutch mechanism 34, the rotation of the winding pipe 3 is stopped. The two-clutch mechanism 35 operates to connect the take-up pipe 3 and the support shaft 30, and the take-up pipe 3 is kept stopped. Further, when the pulley 46 is rotated in the unwinding direction by an operation on the operation unit 4 while the winding pipe 3 is rotating in the winding direction, the first clutch mechanism 34 operates to stop the winding pipe 3.

  As shown in FIGS. 3 and 4, in the operation case 45, a resin washer 50 is provided between the mainspring spring 47, the inner surface of the operation case 45 on the side plate 1 a side, and the fixed shaft 48. . That is, the resin washer 50 is provided on one of both side surfaces of the mainspring 47 in the axial direction of the fixed shaft 48 which is the rotation shaft of the pulley 46.

  The resin washer 50 functions as a sliding member that comes into contact with the spring at the time of winding or unwinding to slide the spring, and when the operating member 40 is wound or unwound, the resin washer 50 By smoothing the operation of the mainspring 47, operation failure of the pulley 46 can be prevented. Here, a resin having a low friction coefficient is used as the resin. The resin is, for example, PTFE (polytetrafluoroethylene), PE (polyethylene), nylon or the like, but is not limited thereto.

  FIG. 5 is a perspective view of the resin washer 50. As shown in the figure, the resin washer 50 has a contact surface 51 designed to have a dimension capable of constantly contacting the mainspring 47 when the mainspring 47 is most contracted until it is fully extended (see FIG. 7).

  As shown in FIG. 3, since the resin washer 50 is provided between the inner surface of the operation case 45 and the mainspring 47, the resin washer 50 is, for example, an uneven part 45 a at the boundary between the operation case 45 and the fixed shaft 48. It is possible to prevent a step or a gap at a joining portion between the springs 47 from being exposed on the spring spring 47 side. Accordingly, it is possible to prevent a situation in which the mainspring 47 is caught on the uneven portion or the like and the operation of the mainspring 47 is hindered.

[Blind operation]
Next, the operation of the blind 100 configured as described above will be described.

  6A to 6G are perspective views showing the state of the screen elevating operation of the roll screen 100. FIG. FIG. 7 is a cross-sectional view of the operation unit 4 before and after the screen lifting operation of the roll screen 100. FIG. 8 is a side view of the operation unit 4 before and after the screen lifting operation of the roll screen 100. FIG. 9 is a side view showing parts other than the operation unit 4 before and after the screen lifting operation of the roll screen 100.

  In FIG. 7, the operation unit 4 is depicted in the same cross section as FIG. 4 (cross section AA in FIG. 3). FIG. 8 is a side view of the operation unit 4 as viewed from the winding pipe 3 side. FIG. 9 shows a side view of the roll screen 100 with the operation unit 4 removed.

  FIGS. 6A, 7A, 8A and 9A show a state in which the screen 2 has been wound up to the upper limit by the winding pipe 3. FIG. In this state, rotation of the take-up pipe 3 in the screen take-up direction by the take-up spring 31 acts on the take-up pipe 3. ing. In this state, the winding cord 49 of the operating member 40 is wound around the pulley 46, and the stopper 44 is in contact with the operating case 45 (see FIGS. 7A and 8A).

  6B, 7B, 8B, and 9B, when the user pulls down the grip 41 of the operation member 40 in the direction of the arrow in the figure, the winding cord 49 of the operation member 40 is pulled from the pulley 46. It is unwound and pulled out of the operation case 45, and the pulley 46 rotates in the unwinding direction. As a result, the winding pipe 3 rotates via the operation unit 4 and the first clutch mechanism 34, and the screen 2 is lowered in the direction of the arrow in FIG. 6B by the amount pulled down by the user. With this lowering, a spring reaction force is accumulated in the mainspring 47 in the operation unit 4.

  Subsequently, as shown in FIG. 6C, when the user stops the pulling-down operation of the grip 41 and releases the hand, the pulley 46 is rotated in the winding direction by the accumulated force of the mainspring 47, and the winding cord 49 is attached to the pulley 46. It is wound up and moves in the direction of the arrow in FIG. On the other hand, the screen 2 stops at the position where the user stops the operation by the connection of the winding pipe 3 and the support shaft 30 by the operation of the second clutch mechanism 35.

  Subsequently, as shown in FIG. 6D, when the user further pulls down the grip 41, the winding pipe 3 is rotated by the same operation as described above, and the screen 2 is further lowered in the direction of the arrow in the figure. Then, as shown in FIG. E, the screen 2 is lowered to the lower limit position by repeating the lowering operation. Further, by adjusting the number of times of this operation, the user can lower the screen to a desired position and stop the screen.

  When raising the screen 2 in the lowered state, as shown in FIG. 6F, the user pulls the grip 41 by a predetermined amount (a rotation amount capable of releasing the second clutch mechanism) in the arrow direction in the figure.

  When the user releases the grip 41, the second clutch mechanism 35 releases the connection between the winding pipe 3 and the support shaft 30, and the winding pipe 3 rotates in the winding direction. The screen 2 is wound up by the action. At this time, the winding speed of the winding pipe 3 is reduced by the first brake 32. As described above, at the final stage of winding, the second brake 33 is operated to further reduce the speed of the screen 2, and the weight is reduced. The impact caused by the bar 5 is reduced.

  Further, even when the user releases the grip 41 vigorously, as described above, the operation cord 42 jumps up and is wound up on the winding pipe 3 together with the screen 2 by the provision of the pole 43 on the operation member 40. Is prevented.

  Further, when the user pulls down the grip 41 while the screen 2 is being lifted, the pulley 46 rotates in the unwinding direction, and the winding pipe 3 turns over and rotates a predetermined amount in the unwinding direction. When the operation is stopped and the hand is released, the screen 2 stops when the winding pipe 3 and the support shaft 30 are connected by the operation of the second clutch mechanism 35. Thereby, the user can stop the lifting of the screen 2 at a desired position.

  In the elevating operation of the screen 2 described above, as shown in FIG. 7, the resin washer 50 is always in contact with the mainspring spring 47 during the extension and contraction of the mainspring 47 due to the rotation of the pulley 46, and causes the mainspring 47 to move. Slide it. Thereby, the frictional resistance on the contact surface during rotation of the pulley 46 is reduced, and the situation where the mainspring 47 is caught by the uneven portion 45a or the like is prevented. Therefore, even if the screen 2 is repeatedly moved up and down, the mainspring 47 and The pulley 46 is prevented from malfunctioning due to deterioration.

[Summary]
As described above, according to the present embodiment, the resin washer 50 facilitates the operation of the mainspring spring 47 when the winding cord 49 is wound or unwound by operating the operation member 40, and the pulley 46 Operation failure can be prevented.

[Modification]
The present invention is not limited only to the above-described embodiments, and can be variously modified without departing from the gist of the present technology.

  In the above embodiment, the resin washer 50 was provided between the inner surface of the operation case 45 and the side surface of the mainspring 47 as a sliding portion. However, in addition to or instead of this, in the operation case 45, a resin sheet is provided as a sliding member on the contact surface between the flat surfaces of the mainspring spring 47 in the winding direction or the unwinding direction of the mainspring spring 47. Is also good.

  FIG. 10 shows a side view of the mainspring spring 47 in this case in an expanded state. As shown in the figure, one resin sheet 60 is provided on the plane of the mainspring 47. The resin sheet 60 is wound and used together with the mainspring 47. Here, the same resin as the resin washer 50 can be used as the resin. In this case, the resin sheet 60 may be fixed to the mainspring spring 47 by sticking or the like, or may be simply placed on the flat surface of the mainspring 47 and wound together without being fixed.

  As shown in FIG. 11, the whole of the mainspring 47 may be covered (coated) with the resin sheet 60.

  As described above, by using the resin sheet 60 as the sliding portion, the operation of the mainspring spring 47 can be smoothed as in the case of the resin washer 50, and when the resin sheet 60 is used together with the resin washer 50, the smoothing can be achieved. Can be further improved.

  In the above embodiment, the resin washer 50 is provided on only one side surface of the mainspring 47, but may be provided on both side surfaces. That is, in addition to the position in the above-described embodiment, the resin washer 50 may be provided between the other side surface of the mainspring 47 and the plane of the pulley 46.

  Instead of providing the resin washer 50, the inner surface of the operation case 45 or the inner surface of the pulley 46 that contacts at least one of the two side surfaces of the mainspring 47 in the rotation axis direction of the pulley 46 is formed of resin having a low friction coefficient. By doing so, it may function as a sliding part. Thus, the operation of the mainspring 47 is facilitated without providing a separate member.

  In the above-described embodiment, an example has been described in which the screen 2 is lowered by the user repeating the pulling-down operation of the operation member 40 (FIGS. 6A to 6E). By repeating the above, the screen 2 may be raised, and the screen 2 may be lowered when the user pulls the operation member 40 by a predetermined amount (the vertical direction for the operation is the reverse of the above-described embodiment).

  In each of the above-described embodiments, an example in which the present invention is applied to a roll screen having a screen as a shielding material has been described. However, the present invention is not limited to roll screens, but is equally applicable to other blinds, such as venetian blinds, pleated screens, roman shades, and the like.

DESCRIPTION OF SYMBOLS 1 ... Support member 2 ... Screen 3 ... Winding pipe 4 ... Operating unit 5 ... Weight bar 30 ... Support shaft 31 ... Winding spring 40 ... Operating member 41 ... Grip 42 Operation code 43 Pole 44 Stopper 45 Operation case 45a Uneven portion 46 Pulley 47 Spring spring 48 Fixed shaft 49 Winding cord 50 Resin washer 60 Resin Sheet 51: Contact surface 100: Roll screen

Claims (4)

Shielding material,
An operation unit that raises and lowers the shielding material in response to a user's lifting operation.
The operation unit includes:
An operation case for accommodating a rotatable pulley,
One end is connected to the pulley so as to be able to be wound and unwound, and an operating member hanging down from the operating case,
A spring for urging the operating member in a direction in which the operating member is wound on the pulley or in a direction in which the operating member is unwound from the pulley,
A sliding portion that is provided in the operation case and contacts the spring at the time of winding or unwinding to slide the spring;
Blind the sliding portion between the inner surface and the spring inner and the operating case from the inner circumferential surface of the pulley, a resin washer-like thin plate which is provided so as to contact the inner surface and the surface. The blind according to claim 1,
The resin- made washer- shaped thin plate has a contact surface designed to have a dimension capable of being constantly in contact with the spring from the time of maximum contraction to the maximum extension of the spring. The blind according to claim 1,
The blind further includes a resin sheet provided on a contact surface between the springs in a winding direction or an unwinding direction of the spring in the operation case. The blind according to any one of claims 1 to 3,
The blind is provided such that the resin- made washer- shaped thin plate does not expose an uneven portion formed on an inner surface of the operation case to the spring side.