JP2018168680A - Roll screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll screen which can automatically wind an operation code related to an operation of raising and lowering a screen, includes an operation device for suppressing light leakage while maintaining operational safety, and preferably provided measures against overload. To do. SOLUTION: The roll screen of the present invention has a take-up pipe 3 capable of raising and lowering a screen 4, a clutch mechanism 14 for transmitting or not transmitting an input shaft 142 to the take-up pipe 3, and an operation code 9. It includes a support member 2a that supports the operating device 10 that can be automatically wound by a fixed shaft 81. The operation device 8 is an operation pulley (pulley gear) having a clutch spring 87 that enables a pull-out operation of the operation code 9 at the center of the operation shaft 82 provided on a shaft different from the fixed shaft 81 and urges the operation code 9 in a direction of constantly winding. 85 and the spring wheel 86), and a rotation transmission mechanism (clutch gear 83 and intermediate gear 84) that transmits the rotation of the operation pulley to the input shaft 142 of the clutch mechanism 14. [Selection diagram] Fig. 1

Description

  The present invention relates to a roll screen that can automatically wind up an operation code related to a screen lifting operation.

  The roll screen supports the winding pipe by a frame (for example, a mounting frame) attached to the mounting surface such as a ceiling surface or a wall surface via a bracket, and attaches the upper edge of the screen to the winding pipe. Then, the amount of light collected into the room can be adjusted by winding or unwinding the screen with a winding pipe.

  As one type of such a roll screen, there is known a roll screen that can automatically wind up an operation code related to the lifting operation of the screen (see, for example, Patent Document 1).

  In the roll screen disclosed in Patent Document 1, an operation cord can be wound around an operation pulley by an urging means such as a mainspring, and the operation pulley is arranged coaxially with a winding pipe to constitute an operation device. Then, by providing a clutch mechanism between the take-up pipe and the operation pulley that transmits or does not transmit the rotation of the operation pulley to the take-up pipe, the operation cord is pulled out from the operation device as the screen moves up and down. After that, the operation cord is wound up in the operation device by an urging means such as a mainspring.

Patent No. 4440802 Specification

  In the roll screen disclosed in Patent Document 1, since the mainspring and the operation pulley are arranged coaxially with the winding pipe to constitute the operation device, the operation device is enlarged, and the operation device and the side edges of the screen are arranged. There is a problem that light leakage occurs due to a gap with the part.

  In addition, when a load greater than or equal to a predetermined load is applied to the cord related to the lifting / lowering operation of the screen, there is a problem of safety such as breakage of a mechanism part in the roll screen and dropping.

  In view of the above problems, a first object of the present invention is a roll provided with an operation device that can automatically wind up an operation code related to the lifting operation of the screen and suppresses the light leakage while maintaining operational safety. To provide a screen.

  In view of the above-described problems, a second object of the present invention is to provide a roll screen provided with an overload countermeasure in a case where a load greater than a predetermined load is applied to a cord related to the lifting operation of the screen.

  The roll screen of the present invention is a roll screen that can automatically wind up an operation cord related to the lifting operation of the screen, based on winding means that enables the lifting operation of the screen, and pulling operation of the operation code A clutch mechanism that has a rotating input shaft and transmits or does not transmit the input shaft to the winding means, and a support that supports an operation device that can automatically wind up an operation cord related to the lifting operation of the screen by a fixed shaft The operation device includes an urging means that allows the operation cord to be pulled out at an operation axis center of an axis different from the fixed shaft, and that urges the operation code in a direction that is always wound up. And a rotation transmission mechanism that transmits rotation of the operation pulley to the input shaft of the clutch mechanism.

  In the roll screen of the present invention, the operation device is arranged such that the operation pulley is separated from the screen in the front-rear direction, and the operation pulley is overlapped in the left-right direction with respect to the screen. It is characterized by that.

  In the roll screen of the present invention, the operation device is characterized in that the operation pulley is arranged so as to protrude in an inward direction of the roll screen.

  In the roll screen of the present invention, the operating device has a shape in which a lateral width of the position of the fixed shaft is narrower than a lateral width of the position of the operation pulley.

  In the roll screen according to the present invention, the rotation transmission mechanism is configured to transmit rotation at a predetermined reduction ratio that reduces an operation load.

  Moreover, the roll screen of this invention WHEREIN: The said operating device has arrange | positioned the hanging position of the said operation code in the back | inner side or the front side from the center of the said operating device.

  In the roll screen of the present invention, the operation device is configured to be rotatable relative to the support member during the operation of pulling out the operation code. It is characterized by being restricted to a range from a predetermined back position that does not contact the screen to a predetermined front position that can reduce the operation load.

  In the roll screen of the present invention, the operation cord is provided with an operation grip that can be separated with a predetermined load.

  Furthermore, the roll screen of the present invention is characterized in that an operation grip that can be separated with a predetermined load is provided on a cord that can open and close the screen.

  According to the present invention, light leakage caused by a gap between the operating device and the side end portion of the screen can be suppressed while maintaining operational safety, so that the light shielding performance can be improved as compared with the conventional technique. .

1 is a front perspective view showing a schematic configuration of a roll screen according to an embodiment of the present invention. It is a side perspective view showing a schematic structure of a roll screen of one embodiment by the present invention. It is front sectional drawing of the periphery of the operating device in the roll screen of one Embodiment by this invention. It is a perspective view which shows the connection of the operating device in the roll screen of one Embodiment by this invention, and the clutch mechanism in a pipe cap. (A), (b) is the perspective view which shows the relationship between the operating device and support member in the roll screen of one Embodiment by this invention, respectively, and the disassembled perspective view of an operating device and a support member. It is a disassembled perspective view from one viewpoint regarding the operating device and support member in the roll screen of one Embodiment by this invention. It is a disassembled perspective view from another viewpoint regarding the operating device and support member in the roll screen of one Embodiment by this invention. (A), (b) is side perspective drawing which shows operation | movement of the operating device in the roll screen of one Embodiment by this invention, respectively. (A), (b) is side perspective drawing which shows the structure of the modifications 1 and 2 with respect to the operating device in the roll screen of one Embodiment by this invention, respectively. (A), (b) is a side perspective view which shows the structure of the modification 3 with respect to the operating device in the roll screen of one Embodiment by this invention, respectively. (A), (b) is sectional drawing which shows an example of the operation grip in the roll screen of one Embodiment by this invention, respectively. It is a front perspective view which shows schematic structure of the modification with respect to the roll screen of one Embodiment by this invention.

  Hereinafter, a roll screen according to an embodiment of the present invention will be described with reference to the drawings. In addition, in the present specification, with respect to the front view of the roll screen shown in FIG. The left direction in the figure is defined as the left side of the roll screen 1 and the right direction in the figure is defined as the right side of the roll screen. Moreover, in the example demonstrated below, let the side to visually recognize be a front side (or indoor side) with respect to the front view of the roll screen shown in FIG. 1, and let the opposite side be a rear side (or outdoor side).

(overall structure)
First, with reference to FIG.1 and FIG.2, the structure of the roll screen of one Embodiment by this invention is demonstrated. FIG. 1 is a front perspective view showing a schematic configuration of a roll screen according to the present invention. FIG. 2 is a side perspective view showing a schematic configuration of the roll screen of the present embodiment.

  In the roll screen of this embodiment, support members 2a and 2b are fixed to both ends of the mounting frame 1, and a cylindrical take-up pipe 3 is rotatably supported between the support members 2a and 2b on the left and right sides. The bracket 6 is used when the mounting frame 1 is indirectly fixed to the attachment surface. Each support member 2 a, 2 b is accommodated by the side cover 7.

  A screen 4 is suspended and supported on the winding pipe 3, and a weight bar 5 is attached to the lower end of the screen 4.

  The take-up pipe 3 is formed of an aluminum shape, and a pipe cap 13 is fitted on the right end side. And the clutch mechanism 14 and the torque limiter 15 are accommodated in the pipe cap 13, respectively.

  The clutch mechanism 14 is a device that rotates the winding pipe 3 only in the screen lowering direction by pulling the operation cord 9 in the operation device 8.

  The torque limiter 15 is a device that prevents reverse winding of the screen 4 around the winding pipe 3. After the screen 4 is completely rewound from the winding pipe 3, the screen 4 is prevented from being reversely wound around the winding pipe 3 when the winding pipe 3 is further rotated in the same direction.

  The clutch mechanism 14 and the torque limiter 15 are not limited, but for example, a technique disclosed in Japanese Patent Application Laid-Open No. 2013-213391 can be used.

  The operating device 8 according to the present embodiment is provided on the right end side of the winding pipe 3, enables the winding pipe 3 to be rotated via the clutch mechanism 14 in the pipe cap 13, and performs a predetermined operation on the support member 2a. It is supported so as to be rotatable within the rotation range.

  As will be described in detail later, the operating device 8 mainly includes a fixed shaft 81 fixed to the support member 2a with a mounting screw 25 as shown in FIG. 3, and a clutch gear rotatable around the fixed shaft 81 as a central axis. 83, an intermediate gear 84 that meshes with the clutch gear 83, and a pulley portion 852 that is attached to the upper end of the string-like operation cord 9 and can be wound up. The pulley gear 85 that meshes with the intermediate gear 84 and rotates about the operation shaft 82. The spring wheel 86 that houses the mainspring spring 87 that normally biases the operation cord 9 in the winding direction and rotates together with the pulley gear 85 is housed by the first operation case 80 and the second operation case 88.

  The lower end of the operation cord 9 suspended from the pulley portion 852 of the pulley gear 85 in the operation device 8 is attached to the operation grip 10.

  Then, when the pulley gear 85 is rotated by the pulling operation of the operation cord 9 by the operation grip 10, the rotation is transmitted to the clutch gear 83. The rotation of the clutch gear 83 is transmitted to the clutch mechanism 14, whereby the clutch mechanism 14 operates to rotate the winding pipe 3 only in the screen lowering direction.

  On the other hand, a spring motor 11 and a stopper device 12 are disposed on the left end side in the winding pipe 3.

  The stopper device 12 is a device that can lock the rotation of the winding pipe 3 in the rewinding direction of the screen 4 corresponding to the pulling operation direction of the operation cord 9. When 3 is rotated, the lock is released.

  The spring motor 11 of the present embodiment rotates the winding pipe 3 in the winding direction of the screen 4 to generate a biasing force for lifting the screen 4 so that the screen 4 can be automatically wound.

  Therefore, in this embodiment, the pulling operation of the operation cord 9 in the operating device 8 causes the winding pipe 3 to rotate in the screen rewinding direction, the screen 4 is lowered, and the operation cord 9 is operated to operate the winding pipe 3. By releasing the operation of the stopper device 12, the winding pipe 3 is rotated based on the urging force of the spring motor 11 and the screen 4 is pulled up.

  Further, the operation cord 9 drawn out from the operation device 8 can be automatically wound up by the urging force of the mainspring spring 87, and most of the operation cord 9 is accommodated in the operation device 8 when the operation cord 9 drawn out is released. It has become.

  Here, as can be understood from FIG. 1, the operation device 8 supported by the support member 2 a is an operation pulley that enables the operation cord 9 to be pulled out at the center of the operation shaft 82 provided on a separate shaft from the fixed shaft 81. (Pulley gear 85 and spring wheel 86) are provided. In other words, the operation pulley includes a mainspring spring 87 that constantly biases the operation cord 9 in the winding direction, and is configured by a pulley gear 85 that accommodates and integrates the mainspring spring 87 in the spring wheel 86. The clutch gear 83 and the intermediate gear 84 are configured as a rotation transmission mechanism that transmits the operation pulley to the input shaft of the clutch mechanism 14. For this reason, the clearance gap between the operating device 8 and the side edge part of the screen 4 can be made narrower, the light leakage produced by this clearance gap can be suppressed, and the light-shielding property can be improved rather than the conventional technique.

  Hereinafter, the configuration of the controller device 8 will be described more specifically.

[Operating device]
First, FIG. 4 shows the connection between the operating device 8 and the clutch mechanism 14 in the pipe cap 13 in the roll screen of this embodiment. The pipe cap 13 has a flange 130 at one end of the cylindrical main body, a plurality of ribs 131 are formed on the outer peripheral wall of the cylindrical main body, and a pair of flanges are formed at the other end of the cylindrical main body. Ribs 132 are formed. With the plurality of ribs 131 and the flange-like ribs 132, the pipe cap 13 is integrally fitted to the inner wall on the right end side of the take-up pipe 3, and the flange 130 is positioned at the right end portion of the take-up pipe 3.

  The clutch mechanism 14 provided in the pipe cap 13 is provided with an input shaft 142 that can rotate relative to the center shaft 141, and a pair of projecting pieces 142 a that project from the input shaft 142 are formed.

  On the other hand, the operating device 8 supported by the support member 2a accommodates the clutch gear 83, the intermediate gear 84, and the pulley gear 85 described above by the first operation case 80 and the second operation case 88. A spring wheel 86 that houses a mainspring spring 87 that normally biases the operation cord 9 in the direction of winding and rotates together with the pulley gear 85 is housed in a pulley housing portion 882 in the second operation case 88. The clutch gear 83 is configured to be rotatable about a fixed shaft 81 fixed to the support member 2a as a central axis, and has a cylindrical portion 832 that is coupled to the input shaft 142 in the clutch mechanism 14 so as not to be relatively rotatable. The cylindrical portion 832 is rotatably supported by the cylindrical portion 881 in the second operation case 88. Two pairs of engaging recesses 833 are arranged on the connecting surface of the cylindrical portion 832 of the clutch gear 83 so as to face each other.

  More specifically, the center shaft 141 in the clutch mechanism 14 is formed of a cylindrical shaft having a step having a convex portion 141a on the front side as shown in the figure, and the fixed shaft 81 in the operating device 8 has the concave portion 814 in the back. It has a shape with a cylindrical axis with a step recess on the side. Then, by engaging the central shaft 141 in the clutch mechanism 14 with the fixed shaft 81 in the operating device 8, the central shaft 141 in the clutch mechanism 14 is unable to rotate relative to the support member 2a.

  Further, the input shaft 142 in the clutch mechanism 14 is relatively rotatable about the central shaft 141, and the pair of projecting pieces 142 a formed on the connecting surface side of the input shaft 142 is connected to the cylinder of the clutch gear 83 in the operating device 8. The input shaft 142 in the clutch mechanism 14 is integrated with the clutch gear 83 in the operating device 8 by engaging with one of the two opposingly disposed pairs of engaging recesses 833 formed on the connecting surface of the portion 832. It can be rotated.

  However, the clutch mechanism 14 is a device that rotates the winding pipe 3 only in the screen lowering direction by pulling the operation cord 9 in the operation device 8. Therefore, when the clutch gear 83 is rotated by pulling the operation cord 9, the input shaft 142 of the clutch mechanism 14 is also integrally rotated in the direction A in the figure. The rotation of the input shaft 142 in the direction A is transmitted to the rotation of the winding pipe 3 in the direction A ′.

  On the other hand, the operation cord 9 is wound up by the urging force of the mainspring spring 87, and even when the clutch gear 83 rotates in the reverse direction, the input shaft 142 in the clutch mechanism 14 also rotates in the direction B as shown in FIG. The rotation of the input shaft 142 in the B direction shown in the figure is idled with respect to the winding pipe 3 and is not transmitted to the rotation of the winding pipe 3. For this reason, when the operation cord 9 is not operated, the operation of the stopper device 12 is canceled, and the winding force of the spring motor 11 described above is used to rotate the winding pipe 3 in the winding direction of the screen 4 to automatically move the screen 4. Can be raised.

  Then, the operating device 8 has a horizontal width of the position of the fixed shaft 81 (the horizontal width of the cylindrical portion 881) as the operating pulley and the horizontal width of the position of the spring wheel 86 (the pulley accommodating portion 882). (Width in the left-right direction) has a narrower shape. For this reason, as shown in FIG. 1, the clearance gap between the operation apparatus 8 and the side edge part of the screen 4 can be made narrower, the light leakage which arises by this clearance gap is suppressed, and light-shielding property is improved rather than the conventional technique. Can do.

  By the way, when the operation device 8 of the present embodiment is in a non-operation state with respect to the operation code 9, as shown in FIG. 5A, the longitudinal direction of the operation device 8 is positioned in the vertical direction (θ = 0). °) from the support member 2a so as to be rotatable within a predetermined range θ (θ ≦ 90 ° in this example).

  That is, as shown in FIG. 5B, the support member 2a is formed with engagement holes 21, 23, a locking hole 22, and a cylindrical protrusion 24. The first operation case 80 of the operating device 8 has a circular opening 802 that exposes the fixed surface of the fixed shaft 81 formed with a pair of engaging protrusions 816 around the fixed hole 817, and 1/4. A circular rotation restricting hole 803 is formed.

  Then, in a state where the pair of engaging protrusions 816 of the fixed shaft 81 are engaged with the engaging holes 21 and 23 in the support member 2a, the mounting screw 25 is fixed to the fixed shaft 81 via the locking hole 22 in the support member 2a. The fixing shaft 81 is fixed to the support member 2 a with the first operation case 80 interposed therebetween, and the cylindrical protrusion 24 of the support member 2 a is inserted into the rotation restriction hole 803 of the operation device 8. Engage so as to be guided to rotate. For this reason, the operating device 8 is supported by the support member 2a so as to be relatively rotatable as shown in FIG. Thus, by supporting the operating device 8 so as to be relatively rotatable with respect to the support member 2a, the operability is improved and the safety is also improved. Details thereof will be described later.

(Operating device)
Next, a detailed configuration of the controller device 8 will be described with reference to FIGS. 6 and 7.

  6 and 7, the operating device 8 includes a first operating case 80, a fixed shaft 81, an operating shaft 82, a clutch gear 83, an intermediate gear 84, a pulley gear 85, a spring wheel 86, a mainspring spring 87, and a second operation. A case 88 and a cord lead member 89 are provided.

  The first operation case 80, together with the second operation case 88, accommodates the fixed shaft 81, the operation shaft 82, the clutch gear 83, the intermediate gear 84, the pulley gear 85, the spring wheel 86, and the mainspring spring 87, and engages the cord lead member 89. It is a member for stopping. The pulley gear 85 and the spring wheel 86 may be integrated in advance, or the cord lead-out member 89 may be integrated with the second operation case 88 in advance.

  The fixed shaft 81 is a member for rotatably supporting the clutch gear 83, and has a shape having a cylindrical shaft 811 having a stepped recess 813 having a concave portion 814 on the back side (see FIG. 6). A flange 812 having a diameter larger than 811 is formed, and a fixing surface 815 that is slightly reduced in diameter and protrudes from the flange 812 is formed (see FIG. 7). The fixing surface 815 is formed with a fixing hole 817 and a pair of engaging protrusions 816 around the fixing hole 817.

  The first operation case 80 is formed with a circular opening 802 having substantially the same diameter as the fixed surface 815 of the fixed shaft 81, and the fixed surface 815 of the fixed shaft 81 is exposed from the opening 802 of the first operation case 80. Then, in a state where the pair of engaging protrusions 816 of the fixed shaft 81 are engaged with the engaging holes 21 and 23 in the support member 2a, the mounting screw 25 is fixed to the fixed shaft 81 via the locking hole 22 in the support member 2a. The fixing shaft 81 is fixed to the support member 2a with the first operation case 80 sandwiched therebetween by being screwed into the fixing hole 817. The pair of engaging projections 816 serve as a rotation stopper for the support member 2a.

  Further, the support member 2a is formed with a quarter-circular rotation restricting hole 803, and when the fixed shaft 81 is fixed to the support member 2a with the first operation case 80 interposed therebetween, the first operation in the operation device 8 is performed. The case 80 is engaged with the rotation restriction hole 803 of the case 80 so as to be guided to rotate (see FIG. 5).

  The operation shaft 82 is a member for rotatably supporting a pulley gear 85 provided with a pulley portion 852 that allows the upper end of the string-like operation cord 9 to be attached and wound up. The pulley gear 85 is fitted with a spring wheel 86 that houses a mainspring spring 87 that urges the operation cord 9 in a direction to be always wound, and the pulley gear 85 and the spring wheel 86 rotate together.

  The operating shaft 82 is screwed into one of the shaft holes 823 that pass through the center of the operating shaft 82 by inserting a mounting screw 808 through a through hole 807 provided in the first operating case 80 (see FIG. 7). ), And is fixed to the first operation case 80. Further, the operating shaft 82 is inserted into a through hole 883 provided in the second operation case 88 by inserting a mounting screw 889 and screwed into the other of the shaft holes 823 passing through the center of the operating shaft 82 (see FIG. 6), and is fixed to the second operation case 88.

  The operation shaft 82 is formed with a locking groove 821 for locking one end 871 of the mainspring spring 87, and a substantially C-shaped step 822 is formed below the locking groove 821. When the operation shaft 82 is fixed to the second operation case 88, the step 822 engages with a substantially C-shaped protrusion 882b formed on the second operation case 88 (see FIG. 7). It acts as a rotation stopper for the second operation cases 80 and 88.

  The clutch gear 83 has a flanged cylindrical portion 832 and a tooth portion 831 formed on the flange surface. The cylindrical portion 832 has a shaft hole 834 having substantially the same diameter as the columnar shaft 811 of the fixed shaft 81, whereby the clutch gear 83 is rotatably supported by the columnar shaft 811 of the fixed shaft 81. A circular recess 835 is formed around the shaft hole 834 on the flange surface of the clutch gear 83 where the tooth portion 831 is formed (see FIG. 7), and the circular recess 835 accommodates the flange 812 of the fixed shaft 81. Therefore, the tooth portion 831 is supported without rattling without coming into contact with the support member 2a.

  The cylindrical portion 832 of the clutch gear 83 is rotatably supported by the inner peripheral wall 881a of the cylindrical portion 881 in the second operation case 88, and the connection surface of the cylindrical portion 832 of the clutch gear 83 is exposed from the cylindrical portion 881. Two sets of a pair of engaging recesses 833 arranged opposite to each other are formed on the connecting surface of the cylindrical portion 832 of the clutch gear 83 (see FIG. 6).

  The engagement recesses 833 of the opposingly arranged pair of the two sets are engaged with a pair of projecting pieces 142a formed on the coupling surface side of the input shaft 142 in the clutch mechanism 14, whereby the input in the clutch mechanism 14 is input. The shaft 142 can rotate together with the clutch gear 83 in the operating device 8 (see FIG. 4).

  The intermediate gear 84 is a member for transmitting the rotation of the pulley gear 85 to the clutch gear 83, and has a tooth portion 841 formed on the flange surface. The tooth portion 841 of the intermediate gear 84 meshes with the tooth portion 831 of the clutch gear 83 and also meshes with the tooth portion 851 of the pulley gear 85. The intermediate gear 84 is rotatably supported by a cylindrical shaft 884 a that protrudes from the second operation case 88 with a through shaft 842 configured as a central axis thereof, and the tip of the cylindrical shaft 884 a is an axis formed in the first operation case 80. It engages with the hole 805.

  The pulley gear 85 is configured to include a tooth portion 851 that meshes with the tooth portion 841 of the intermediate gear 84 and a pulley portion 852 that can wind up the upper end of the string-like operation cord 9, and is configured as an operation pulley together with the spring wheel 86. The

  The pulley portion 852 is provided with a locking hole 856 for attaching the upper end of the operation cord 9 with a knot or the like. The operation cord 9 is pulled against the pulley portion 852 so that the urging force of the mainspring spring 87 is applied. It is wound in the direction of accumulating.

  The pulley gear 85 is rotatably supported by an operation shaft 82 through a through shaft 853 configured as a central axis. A pair of fitting holes 855 are formed in the pulley gear 85, and an annular convex portion 854 that slightly protrudes is formed on the surface of the pulley gear 85 where the pulley portion 852 is formed.

  The pair of fitting holes 855 of the pulley gear 85 are provided for fitting with a pair of claws 864 projecting from the spring wheel 86 that houses the mainspring spring 87 (see FIG. 7), and the annular protrusion 854 of the pulley gear 85 is a spring foil. 86 is provided to support the central shaft hole 863 of the 86 (see FIG. 6).

  The spring wheel 86 is fitted so as to rotate integrally with the pulley gear 85, accommodates the mainspring spring 87, and has an operating shaft 82 formed with a locking groove 821 for locking one end 871 of the mainspring spring 87 as a central shaft hole 863. Is penetrated by. The other end 872 of the mainspring spring 87 is engaged with one of the two locking holes 862 formed in the spring wheel 86.

  As a result, the mainspring spring 87 urges the operation cord 9 attached at the upper end by the pulley portion 852 in the direction in which the operation cord 9 is always taken up.

  The lower end of the operation cord 9 is inserted into the insertion hole 891 of the cord lead member 89 and then attached to the operation grip 10.

  The second operation case 88 has a shape that accommodates a pulley gear 85 fitted with a clutch gear 83, an intermediate gear 84, and a spring wheel 86 (see FIG. 7). In particular, the cylindrical portion 881 in the second operation case 88 supports the flanged cylindrical portion 832 of the clutch gear 83 so as to be rotatable without backlash by the inner peripheral wall 881a and the accommodating portion 881b connected thereto.

  Further, the accommodating portion 884 in the second operation case 88 accommodates the intermediate gear 84 while inserting the through shaft 842 of the intermediate gear 84 through the cylindrical shaft 884a protruding from the center thereof and rotatably supporting it without rattling.

  Further, the accommodating portion 882 in the second operation case 88 has a substantially C-shaped convex portion 882 b formed on the inner wall 882 a side thereof engaged with a substantially C-shaped step 822 of the operation shaft 82. The pulley gear 85 that is rotatably supported and fitted with the spring foil 86 is accommodated so as to be rotatable without rattling.

  Respective mounting screws 808 are inserted into the through holes 801, 804, 806 provided in the first operation case 80, and screw holes 886, 887, 888 provided in the corresponding second operation case 88 are inserted. And locked. The mounting screws 808 and 889 are inserted into the through holes 807 provided in the first operation case 80 and the through holes 883 provided in the second operation case 88, respectively. Are locked on both sides of the shaft hole 823 that passes through the shaft.

  By the way, in the present embodiment, a locking portion 885 that locks the cord derivation member 89 is formed at the lower end portion of the housing portion 882 in the second operation case 88 at the back side from the approximate center in the front-rear direction. (See FIG. 7). This is for reducing the bending load of the operation cord 9 and will be apparent from the description of the operation of the operation device 8 below.

  FIG. 8A is a side perspective view showing the operation of the operation device 8 on the roll screen of the present embodiment when operated, and FIG. 8B is the side perspective view showing the operation of the operation device 8 when not operating. FIG.

  In this embodiment, as shown in FIG. 8 (a), the pulling operation of the operation cord 9 in the operating device 8 rotates the winding pipe 3 in the screen rewinding direction to lower the screen 4, and FIG. As shown in b), the weight bar 5 can be stopped at an arbitrary position by the operation of the stopper device 12. Further, by operating the operation cord 9 to release the operation of the stopper device 12 in the winding pipe 3, the winding pipe 3 is rotated based on the urging force of the spring motor 11, and the screen 4 is automatically moved. Pull up and take up.

  Here, as shown in FIG. 8A, the operating device 8 is supported so as to be relatively rotatable with respect to the support member 2a within a predetermined range θ. In this example, the state in which the longitudinal direction of the operating device 8 is positioned in the vertical direction is θ = 0 °, and as described with reference to FIG. 5, the operating device 8 rotates in the range of 0 ° ≦ θ ≦ 90 °.

  As described above, when the operation device 8 is operated as shown in FIG. 8A, the operation load can be reduced by allowing the relative rotation forward. Further, in the non-operation state shown in FIG. 8B, most of the operation cord 9 pulled out is automatically wound up and accommodated in the operation device 8 by the urging force of the mainspring spring 87. The biasing force of the spring 87 assists the relative rotation of the operating device 8 to the rear. At this time, if the operation device 8 is relatively rotated rearward from the vertical direction, the operation device 8 comes into contact with the screen 4 and is not preferable from the viewpoint of quality and safety.

  For this reason, in this embodiment, it is restricted to rotate in the range of 0 ° ≦ θ ≦ 90 °. Note that the range in which the relative rotation is possible is restricted to a range from a predetermined back position where the operating device does not contact the screen to a predetermined front position where the operation load can be reduced. It is not necessary to limit to the range of 0 ° ≦ θ ≦ 90 °. However, it is preferable from the viewpoint of design that the longitudinal direction of the operating device 8 is set in the vertical direction in a non-operating state.

  As a first modification of the present embodiment, as shown in FIG. 9A, a cord derivation member 89 is provided at the approximate center of the lower end portion of the accommodating portion 882 in the second operation case 88, and It is possible to make the hanging position of the cord 9 approximately the center in the front-rear direction. However, in this case, the bending load of the operation cord 9 hanging from the pulley portion 852 of the pulley gear 85 increases.

  For this reason, as in the present embodiment shown in FIG. 8A, a cord lead-out member 89 is provided on the back side from the approximate center of the lower end of the accommodating portion 882 in the second operation case 88, and the operation from the operation device 8 is performed. It is preferable that the hanging position of the cord 9 be on the far side, and the bending load of the operation cord 9 hanging from the pulley portion 852 of the pulley gear 85 can be reduced. Thereby, abrasion of the operation cord 9 can be reduced.

  As a second modification of the present embodiment, as shown in FIG. 9B, the hanging position of the operation cord 9 from the operation device 8 can be set to the front side. In this case, the intermediate gear 84 may be omitted as illustrated, or an even number of intermediate gears 84 may be provided. When the intermediate gear 84 is omitted as shown in FIG. 9B, it is necessary to avoid interference in consideration of the winding thickness of the winding pipe 3, and the pulley accommodating portion 882 of the pulley gear 85 is provided. It is necessary to be provided on the side away from the screen 4 to avoid interference with the support member 2a.

  The rotation transmission mechanism (a combination of the clutch gear 83 and the intermediate gear 84) that transmits the rotation of the pulley gear 85 to the winding pipe 3 is preferably configured to transmit rotation at a predetermined reduction ratio that reduces the operation load. .

  As shown in FIG. 8A, in this embodiment, the pulling operation of the operation cord 9 in the operation device 8 causes the winding pipe 3 to rotate in the screen rewinding direction and the screen 4 to be lowered, thereby stopping the stopper device. The example in which the screen 4 is automatically lifted based on the urging force of the spring motor 11 by releasing the operation of 12 has been described.

  On the other hand, as a third modification of the present embodiment, the pulling operation of the operation cord 9 in the operation device 8 rotates the winding pipe 3 in the screen winding direction to raise the screen 4 and release the operation of the stopper device 12. Thus, the screen 4 can be lowered by the weight of the weight bar 5.

  For example, as shown in FIGS. 10A and 10B, when the operating device 8 shown in FIGS. 6 and 7 has almost the same structure, the direction in which the urging force of the mainspring spring 87 is generated is reversed, The direction of the operation cord 9 wound around the pulley portion 852 of the pulley gear 85 is reversed, and the operation direction of the clutch mechanism 14 is further reversed. At this time, the hanging position of the operation cord 9 from the operation device 8 can be set to the front side. The spring motor 11 is used to reduce the operating force when the screen 4 is rolled up.

  Then, as shown in FIG. 10 (a), the pulling operation of the operation cord 9 in the operating device 8 rotates the winding pipe 3 in the screen winding direction to raise the screen 4, and FIG. 10 (b). As shown, the weight bar 5 can be stopped at an arbitrary position by the operation of the stopper device 12. Further, by operating the operation cord 9 to release the operation of the stopper device 12 in the winding pipe 3, the winding pipe 3 is rotated by the weight of the weight bar 5 and the screen 4 is automatically lowered. Can do.

  Even in the case of such modification 3, as can be understood from FIG. 1, the gap between the operating device 8 and the side end portion of the screen 4 can be made narrower, and light leakage caused by this gap is suppressed and the conventional technique is suppressed. The light shielding property can be improved as compared with the technique, and the operations and effects of the embodiment described with reference to FIG. 8 can be obtained in substantially the same manner.

(Operation grip)
In the roll screens of the above-described embodiments and modifications, the operation code 9 can be automatically wound up, so that operation in only one operation direction (drawing direction) is possible and the operability is improved, but the operation code exceeds the specification limit. Further contrivance is desired from the viewpoint of quality and safety, such as pulling out 9 and damaging the operating device 8.

  Therefore, for example, as shown in FIG. 11, it is preferable that the operation grip 10 provided at the lower end of the operation cord 9 has a structure that can be detached when overloaded. FIGS. 11A and 11B are cross-sectional views showing an example of the operation grip 10 in the roll screen of this embodiment.

  First, a synthetic resin ball portion 91 is provided at the lower end portion of the operation cord 9 and locked with a knotted ball or the like. An upper portion of the operation grip 10 is provided with an insertion hole 10a through which the ball portion 91 can be inserted by elastic deformation and a locking portion 10b for locking the ball portion 91 below a predetermined pulling force.

  Then, as shown in FIG. 11 (a), the ball portion 91 is locked to the locking portion 10 b below a predetermined pulling force, and the operation cord 9 is pulled out from the operating device 8 in accordance with the pulling operation of the operation grip 10. It is. On the other hand, when an overload occurs in the operation of pulling out the operation grip 10, the insertion hole 10a is elastically deformed and the ball portion 91 is detached from the locking portion 10b. It is also possible to lock the ball portion 91 to the locking portion 10b and restore it.

  Thus, it is effective from the viewpoint of quality and safety that the operation grip 10 is configured to be separable from the operation cord 9 with a predetermined load.

  In addition to the roll screen of the embodiment shown in FIG. 1, one end of a pull cord 9P is attached to the weight bar 5 and an operation grip 10P is added to the other end of the pull cord 9P as in the modification shown in FIG. A roll screen capable of dual operation can also be configured. The operation grip 10P can also be separated from the operation cord 9P with a predetermined load in the same manner as the operation grip 10 shown in FIG. 11, so that the quality and safety can be improved.

  The present invention has been described above with reference to specific embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical concept thereof. For example, in the example of the embodiment described above, the example in which the fixed shaft 81 is provided inside the operating device 8 and fixed to the support member 2a has been described. However, the fixed shaft 81 may be fixed to the support member 2a in advance. Is possible. Furthermore, the operation device 8 according to the present invention can be applied to a roll screen that hangs two screens forward and backward.

  According to the present invention, light leakage caused by a gap between the operating device and the side edge of the screen can be suppressed while maintaining operational safety, which is useful for roll screen applications.

DESCRIPTION OF SYMBOLS 1 Mounting frame 2a, 2b Support member 3 Winding pipe 4 Screen 5 Weight member (weight bar)
6 Bracket 7 Side cover 8 Operation device 9 Operation code 10 Operation grip 11 Spring motor 12 Stopper device 13 Pipe cap 14 Clutch mechanism 15 Torque limiter 80 First operation case 81 Fixed shaft 82 Operation shaft 83 Clutch gear 84 Intermediate gear 85 Pulley gear 86 Spring wheel 87 Mainspring spring 88 Second operation case 89 Cord lead member

Claims (9)

A roll screen capable of automatically winding up an operation code related to the lifting operation of the screen,
Winding means enabling the screen to be lifted and lowered
A clutch mechanism having an input shaft that rotates based on a pulling operation of the operation code, and transmitting or non-transmitting the input shaft to the winding means;
A support member that supports an operation device that can automatically wind up an operation code related to the lifting operation of the screen by a fixed shaft;
The operating device is:
An operation pulley having an urging means for allowing the operation cord to be pulled out at an operation axis center of an axis different from the fixed shaft and urging the operation code in a direction to be always wound;
A rotation transmission mechanism for transmitting rotation of the operation pulley to the input shaft of the clutch mechanism;
A roll screen characterized by comprising:   2. The operation device according to claim 1, wherein the operation pulley is spaced apart from the screen in the front-rear direction, and the operation pulley is disposed so that there is an overlapping region in the left-right direction with respect to the screen. Roll screen as described in.   3. The roll screen according to claim 1, wherein the operation device is arranged such that the operation pulley projects in an inward direction of the roll screen.   The roll screen according to any one of claims 1 to 3, wherein the operation device has a shape in which a lateral width of the position of the fixed shaft is narrower than a lateral width of the position of the operation pulley. .   The roll screen according to any one of claims 1 to 4, wherein the rotation transmission mechanism is configured to transmit rotation at a predetermined reduction ratio that reduces an operation load.   The roll screen according to any one of claims 1 to 5, wherein the operation device has a hanging position of the operation cord disposed on the back side or the front side from the center of the operation device.   The operation device is configured to be rotatable relative to the support member during the operation of pulling out the operation code, and the range of the relative rotation is a predetermined back position where the operation device does not contact the screen. The roll screen according to any one of claims 1 to 6, wherein the roll screen is regulated so as to be in a range from a position to a predetermined front position where the operation load can be reduced.   The roll screen according to any one of claims 1 to 7, wherein the operation cord is provided with an operation grip that can be separated by a predetermined load.   A roll screen characterized in that an operation grip capable of being separated with a predetermined load is provided on a cord capable of opening and closing the screen.