JP6184883B2 - Blind clutch device - Google Patents

Description

  The present invention relates to a blind clutch device that transmits or does not transmit the rotation of a pulley that is rotationally driven by an operation member to a rotating shaft that raises or lowers a shielding member in accordance with the direction of rotation.

  As a general configuration of a blind, there is known a configuration in which a shielding member is wound or unwound by operating an operation member to rotate a pulley and rotating a rotating shaft body. As another configuration, there is known a configuration in which the shielding material is raised or lowered by winding or unwinding a lifting cord attached to the lower end of the shielding material. In these cases, the rotating shaft body directly winds or unwinds the shielding material or the lifting / lowering cord, or indirectly winds or unwinds depending on the rotation direction.

  The rotation direction of the rotating shaft body is determined by the rotation direction of the pulley that is switched by the operation of the operation member. And, as the operator can operate the operation member easily and quickly without hesitation, by rotating the operation member in one direction at all times, the rotation of the rotating shaft body in both directions can be performed. Of course, a blind is known in which the rotation direction is switched and stopped (see Patent Document 1).

  According to Patent Document 1, a pulley that is rotatably supported, an operation member having one end coupled to the pulley so as to be wound and unwound, and a biasing member that constantly biases the pulley in the winding direction of the operation member And a rotating body that is provided between the rotating shaft body and the pulley, and rotates integrally with the pulley, and is provided between the rotating shaft body and the rotating body, and connects the pulley and the rotating shaft body. A first clutch mechanism capable of releasing the connection and transmitting or not transmitting the rotation of the pulley to the rotating shaft body; and a second clutch mechanism capable of connecting and releasing the rotating shaft body and the fixed body. When the pulley is rotated by the operation, the rotating shaft can be rotated in one direction via the rotating body and the first clutch mechanism, and the pulley is rotated by a predetermined angle by the operation of the operating member. The clutch mechanism Releasing the connection between the guinea body and the fixed body, rotating shaft is configured to be able to rotate in the other direction.

  According to Patent Document 1, the first clutch mechanism rotates together with the switching guide that can rotate relative to the pulley within a range of a predetermined rotation angle and the relative rotation angle between the switching guide and the pulley. And an engaging member that is movable to a position where the rotation of the pulley is transmitted to the rotating shaft body and a position where the rotation of the pulley is not transmitted to the rotating shaft body. The switching guide is held by the fixed body while the rotating shaft is rotating in the other direction and is not held by a force stronger than the rotational force received and weaker than the biasing force received from the biasing member. When the pulley is rotating in the direction in which the operation member is wound up by the urging member, the holding of the fixed body is released and the pulley rotates with the pulley.

  As a result, when the pulley is not rotating during the rotation of the rotating shaft body, the switching guide is rotated by the rotation of the rotating shaft body, causing the first clutch mechanism to inadvertently perform a switching operation and causing a malfunction. There has been no such thing.

JP 2006-241692 A

  By the way, in Patent Document 1, the switching guide is held by the fixed body with a force stronger than the rotational force received from the rotating shaft body and weaker than the biasing force received from the biasing member. This is due to the frictional force between the flat surface that is spaced apart at equal intervals and slightly protrudes toward the fixed body and the outer peripheral surface of the fixed body. For this reason, for example, if the pulley is rotated while operating the operation member slowly, the urging force from the urging member becomes weak, so the switching guide does not rotate with the pulley but rotates with the rotation of the rotating shaft body. There is a possibility that. As a result, there is a problem in that the first clutch mechanism may inadvertently perform a switching operation, and may cause a malfunction, for example, the rotating shaft cannot be rotated in the reverse direction.

  Therefore, the present invention has been made in view of such problems, and an object of the present invention is to provide a blind that does not cause malfunction.

  In order to solve the above-described problem, according to the present invention, the rotation of the pulley is provided between a pulley that is rotationally driven by the operation member and a rotary shaft that raises or lowers the shielding material according to the rotation direction. Is a blind clutch device that switches between a transmission state in which the rotation shaft body is transmitted and a non-transmission state in which the rotation of the pulley is not transmitted to the rotation shaft body. An engagement member that is movable between a transmission position that enables transmission and a non-transmission position that disables transmission of rotation between the pulley and the rotary shaft; and the pulley or the rotary shaft A guide member for rotating the engagement member to the transmission position or the non-transmission position, a permissible state for allowing the pulley and the guide member to rotate, and the pulley and the guide member. A clutch member that switches between a non-permitted state that does not allow rolling, and is switched to a permitted state when the pulley rotates in one direction, allowing the guide member to rotate and moving the engagement member to a transmission position. A blind clutch device comprising: a clutch member that is switched to a non-permitted state during rotation in the other direction of the rotating shaft body and that restricts rotation of the guide member and moves the engagement member to a non-transmission position. Is done.

  According to this invention, when the pulley rotates in one direction by the operation of the operation member, the rotation of the pulley is transmitted to the transmission member, and the rotation of the guide member is allowed by the clutch member. Thereby, since an engaging member moves to a transmission position, according to the operation amount of an operation member, a shielding material raises or descends. On the other hand, when the operating member is not operated, the rotation of the guide member is restricted by the clutch member, and the engaging member moves to the non-transmission position. For this reason, for example, the shielding material can be raised by the urging force of a spring built in the rotating shaft, or the shielding material can be lowered by the weight of the shielding material itself. In this way, the integral or relative operation switching between the guide member and the clutch member is ensured.

  Further, the clutch member may be switched to an allowable state when the pulley is rotated in the other direction, and the engagement member may be moved to the non-transmission position to rotate the pulley and the guide member. Accordingly, even if the pulley rotates in the other direction during rotation in the other direction of the rotating shaft body, the rotation of the pulley is not transmitted to the rotating shaft body.

  The clutch member is a clutch spring that is provided between the guide member and the fixed body that rotatably supports the guide member, and switches between connection and non-connection between the guide member and the fixed body using fastening and relaxation. Also good.

  Thus, by using a clutch spring as the clutch member, when a one-way rotation is input from the guide member to the clutch spring, the clutch spring is loosened from the fixed body after the engagement member is moved to the transmission position. However, it rotates together with the guide member and the rotating shaft. On the other hand, when rotation in the other direction is input to the clutch spring from the guide member, the clutch spring is fastened to the fixed body, so that the rotation of the guide member is restricted and the engagement member is moved to the non-transmission position. As a result, the guide member and the rotating shaft can be rotated relative to each other. Further, when rotation in the other direction is input from the pulley, the clutch spring is loosened from the fixed body, the guide member rotates in the other direction, and the engagement member moves to the non-transmission position. As a result, the guide member and the rotating shaft can be rotated relative to each other.

  Further, two rotating shaft bodies may be provided side by side, and the rotation of the pulley may be transmitted to each of the two rotating shaft bodies via the drive gear. Thus, for example, when the pulley rotates in one direction, the engaging member is in the transmission position on one rotating shaft body side, the rotation of the pulley is transmitted to one rotating shaft body, and the engaging member is engaged on the other rotating shaft body side. The member is in the non-transmitting position, and the rotation of the pulley can be prevented from being transmitted to the other rotating shaft body. Therefore, it is possible to select a rotating shaft body to which rotation is transmitted according to the rotation direction of one pulley.

According to the present invention, the movement of the engaging member to the transmission position transmitting the rotation to the rotating shaft and the non-transmission position not transmitting the rotation are guided by the rotational force and the rotation direction of the pulley input to the clutch member. By operating the guide member, the integral or relative operation of the guide member and the clutch member can be reliably switched.
The other effects of the present invention will be described in the section for carrying out the invention below.

It is a perspective view of the roll screen which concerns on embodiment of this invention. It is an exploded view of a roll screen, (a) shows the state which removed the operation unit, (b) shows only an operation unit. It is a disassembled perspective view of an operation unit. It is a perspective view which shows the state which attaches an operation unit to a side plate. It is a fragmentary sectional view which shows the state which attaches a 1st, 2nd clutch apparatus to an operation unit, an operation unit is AA sectional drawing of FIG. Show. It is sectional drawing of an operation unit, (a) is DD sectional drawing of FIG. 5, (b) is EE sectional drawing of FIG. It is a disassembled perspective view of a clutch apparatus. It is sectional drawing of a clutch apparatus, (a) is BB sectional drawing of FIG. 5, (b) is CC sectional drawing of FIG. It is the figure which showed the motion of the cam drum in a 2nd, 4th clutch mechanism, (a) is a stop, (b) is a screen lowering, (c) is a descent operation stop, (d) is a descent operation cancellation, (E) is a figure which shows the time of a screen rising. It is a perspective view which shows the state which attaches the 1st and 2nd clutch apparatus to an operation unit. In FIG. 5, it is a figure which shows the state which attached the 1st, 2nd clutch apparatus to the operation unit. It is a figure which shows operation | movement of a roll screen, and is a figure which shows a state when the 1st winding pipe has stopped in the screen upper limit position, and the 2nd winding pipe has stopped in the screen upper limit position. It is a figure which shows operation | movement of a roll screen, and is a figure which shows a state when the 1st winding pipe starts the downward operation and the 2nd winding pipe has stopped at the screen upper limit position. It is a figure which shows operation | movement of a roll screen, and is a figure which shows a state when the downward operation of a 1st winding pipe is stopped and the 2nd winding pipe has stopped in the screen upper limit position. It is a figure which shows operation | movement of a roll screen, and is a figure which shows a state when rotation of the 1st winding pipe is restrained by the 2nd clutch mechanism, and the 2nd winding pipe has stopped at the screen upper limit position. It is a figure which shows operation | movement of a roll screen, and is a figure which shows the state when the restraint by the 2nd clutch mechanism of a 1st winding pipe is cancelled | released and the 2nd winding pipe has stopped in the screen upper limit position. It is a figure which shows operation | movement of a roll screen, and is a figure which shows a state when screen lowering operation of the 1st winding pipe is stopped and the 2nd winding pipe has stopped in the screen upper limit position. It is a figure which shows operation | movement of a roll screen, and is a figure which shows a state when the 1st winding pipe rotates with the winding spring, and the 2nd winding pipe has stopped at the screen upper limit position. It is a figure which shows operation | movement of a roll screen, and is a figure which shows a state when engagement with the 1st clutch mechanism of a 1st winding pipe is cancelled | released and the 2nd winding pipe has stopped in the screen upper limit position. . It is a figure which shows operation | movement of a roll screen, and is a figure which shows a state when the 1st winding pipe rotates in the screen winding direction, and the 2nd winding pipe has stopped in the screen upper limit position. It is a figure which shows operation | movement of a roll screen, and is a figure which shows a state when the 1st winding pipe has stopped in the middle of raising / lowering of a screen, and the 2nd winding pipe has stopped in the screen upper limit position. It is a figure which shows operation | movement of a roll screen, and is a figure which shows the state which the 1st winding pipe has stopped in the middle of raising / lowering of a screen, and the screen lowering operation was started in the 2nd winding pipe. It is a figure which shows operation | movement of a roll screen, and is a figure which shows the state which the 1st winding pipe has stopped in the middle of raising / lowering of a screen, and the screen lowering operation is continued in the 2nd winding pipe. It is a figure which shows operation | movement of a roll screen, and is a figure which shows the state by which the restraint by the 2nd clutch mechanism of a 1st winding pipe is cancelled | released, and screen downward operation is continued in a 2nd winding pipe. It is a figure which shows operation | movement of a roll screen, and is a figure which shows the state immediately after the 1st winding pipe has stopped in the middle of raising / lowering of a screen, and the unwinding of the screen was started in the 2nd winding pipe. It is a figure which shows operation | movement of a roll screen, and is a figure which shows the state which the 1st winding pipe has stopped in the middle of raising / lowering of a screen, and the unwinding of the screen was started in the 2nd winding pipe. It is a figure which shows operation | movement of a roll screen, and is a figure which shows the state in which the 1st winding pipe has stopped in the middle of raising / lowering of a screen, and the unwinding of the screen is continued in a 2nd winding pipe.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  A roll screen as a blind to which the blind clutch device according to the present invention is applied will be described with reference to FIGS. Note that the blind is not limited to a roll screen, and can be any blind such as a horizontal blind, a roman shade, a pleated screen, and the like provided with a plurality of shielding materials.

  As shown in FIGS. 1 and 2, a roll screen 100 according to the present embodiment includes a set frame 120 attached to a fixing unit (not shown) such as a window frame by a pair of brackets 110, 110, and both ends of the set frame 120. A pair of side plates 130 and 130 provided, a first and second winding pipes 140 and 150 shown in FIG. 2A, which are rotatably supported by the pair of side plates 130 and 130, and a first And first and second screens 160 and 170 having one ends connected to the second winding pipes 140 and 150 so as to be wound and unwound. The roll screen 100 is provided on one of the first and second weight bars 180 and 190 and the pair of side plates 130 and 130 provided at the lower ends of the first and second screens 160 and 170, respectively. The operation unit 200 shown in FIG. 2B, which operates the rotation of the two winding pipes 140 and 150, is provided between the operation unit 200 and the first and second winding pipes 140 and 150, respectively. The first and second clutch devices 300 and 400 shown in FIG. 2A, which switch between a transmission state in which the rotation of 200 is transmitted to the first and second winding pipes 140 and 150 and a non-transmission state in which the rotation is not transmitted; It is configured with.

  As shown in FIG. 2A, the first and second take-up pipes 140, 150 are arranged slightly shifted in the front-rear direction (left-right direction in the drawing) with respect to the pair of side plates 130, 130. The first winding pipe 140 is located on the indoor side, and the second winding pipe 150 is located on the outdoor side. In addition, in the first winding pipe 140 and the second winding pipe 150, winding springs (not shown) for constantly urging them in the screen winding direction are provided. The first screen 160 is suspended from the indoor side of the first winding pipe 140, and the second screen 170 is suspended from the outdoor side of the second winding pipe 150. Thereby, as shown in FIG. 1, the first and second screens 160 and 170 hang down so as to overlap each other with an interval in the front-rear direction.

  As shown in FIGS. 2B and 3 to 6, the operation unit 200 transmits an operation chain (operation member) 210, a pulley 220 that is rotationally driven by the operation chain 210, and the rotation of the pulley 220. The intermediate gear 230, the first and second drive members 240 and 250 to which the rotation of the intermediate gear 230 is transmitted, and the engaged state in which the first and second drive members 240 and 250 are engaged to rotate integrally. First and second transmission members that are switched to a disengaged state that does not engage with the first and second drive members 240 and 250 and that rotate relative to each other, and transmit the rotation to the first and second clutch devices 300 and 400, respectively. 260 and 270, and a case 280 for housing these members. The configuration of each part of the operation unit 200 will be described in detail below.

(Pulley 220)
As shown in FIG. 3, the pulley 220 has a sprocket part 221 and a gear part 222 having a smaller diameter than the sprocket part 221, which are integrally formed via a cylindrical part 223 having the same diameter as the gear part 222. The insertion hole 224 is formed in the center. As shown in FIGS. 5 and 6B, an endless operation chain 210 is wound around the sprocket portion 221, and the pulley 220 is rotated by the operation of the operation chain 210.

(Intermediate gear 230)
As shown in FIGS. 3 and 4, the intermediate gear 230 has a ring shape in which a gear is formed on the outer periphery. The intermediate gear 230 has a gear portion 222 of the pulley 220 and a first gear portion of the first drive member 240 described later. 241 and the second gear portion 251 of the second driving member 250 are engaged with each other, and the rotation of the pulley 220 and the first and second driving members 240 and 250 is transmitted.

(First and second driving members 240 and 250)
As shown in FIG. 3, the first and second drive members 240 and 250 have the same shape, and are respectively provided with the first gear portion 241 and the second gear portion 251 that mesh with the intermediate gear 230 on the outer periphery. It is formed in a shape. As shown in FIG. 5, a ring-shaped first groove 242 and second groove 252 are formed on the sides of the first and second driving members 240 and 250. As shown in FIG. Notches 243 and 253 are formed at three locations in the circumferential direction of 242, respectively.

(First and second transmission members 260, 270)
As shown in FIG. 3, the first and second transmission members 260 and 270 have the same shape, have a flat ring shape, and are respectively engaged protrusions from three circumferential directions on one surface 261 and 271. 262 and 272 are formed protruding in the axial direction. The first and second transmission members 260 and 270 are fitted in the first groove portion 242 and the second groove portion 252 of the first and second drive members 240 and 250, respectively, and the engagement protrusions 262 and 272 are formed in the notches 243 and 253, respectively. Each is configured to be inserted.

(Case 280)
As shown in FIG. 3, the case 280 includes a support plate 281 that rotatably supports each member, and a cover 282 that stores each member. The support plate 281 includes a circular opening 281a that rotatably supports the cylindrical portion 223 of the pulley 220, and a cylindrical first support portion that protrudes from one surface of the support plate 281 and supports the intermediate gear 230 rotatably. 281b, and second and third support portions 281c and 281d that respectively protrude from one surface of the support plate 281 and support the first and second drive members 240 and 250 in a rotatable manner. The second and third support portions 281c and 281d are provided with rectangular through holes 281e and 281f, respectively, and the first and second clutch devices 300 and 400 are provided in the rectangular through holes 281e and 281f, respectively. The square portions at the tips of first and second shafts 330 and 430, which will be described later, are fitted together. As a result, the case 280 supports the first and second shafts 330 and 430 in a state where the rotation is restricted. Further, the cover 282 is formed with a support portion 282a that is inserted through the insertion hole 224 of the pulley 220 and rotatably supports the pulley 220.

  The first side plate 130 to which the case 280 is attached exposes substantially the entire first and second driving members 240 and 250, but the first and second driving members 240 and 250 are not inserted through the first side plate 130. First and second circular openings 131 and 132 are formed, respectively.

Each member comprised as mentioned above is assembled | attached as shown in FIGS.
That is, as shown in FIG. 4, the pulley 220 is located in a space where the sprocket part 221 is formed between the support plate 281 and the cover 282, and the gear part 222 is located between the support plate 281 and the side plate 130. The cylindrical portion 223 is rotatably supported by the circular opening 281 a of the support plate 281. Further, the cover 282 is assembled to the support plate 281 so that the support portion 282 a of the cover 282 is inserted into the insertion hole 224 of the pulley 220.

  As shown in FIG. 4, the intermediate gear 230 is rotatably supported by the first support portion 281 b of the support plate 281, and meshed with the gear portion 222 of the pulley 220 so that the rotation can be transmitted.

  As shown in FIGS. 4 and 5, the first and second transmission members 260 and 270 are fitted in the first groove portion 242 and the second groove portion 252 of the first and second drive members 240 and 250 so as to be relatively rotatable. In this state, as shown in FIG. 6A, the three engagement protrusions 262 and 272 of the first and second transmission members 260 and 270 are formed in the three notches of the first and second drive members 240 and 250, respectively. 243 and 253 are inserted in a one-to-one correspondence. As described above, the first and second drive members 240 and 250 are fitted to the first and second transmission members 260 and 270, and the first and second drive members 240 and 250 are connected to the second and second support plates 281. The third support portions 281c and 281d are rotatably supported. The first and second driving members 240 and 250 are meshed with the intermediate gear 230 so that rotation can be transmitted.

  As shown in FIG. 6A, the engagement protrusions 262 and 272 of the first and second transmission members 260 and 270 are inserted into the notches 243 and 253 of the first and second drive members 240 and 250, respectively. Thus, the idling mechanism 290 is configured. The idling mechanism 290 causes the first and second drive members 240 and 250 and the first and second transmission members 260 and 270 to move while the engagement protrusions 262 and 272 move through the notches 243 and 253 (that is, The aforementioned non-engagement state) rotates relative to each other. When the engagement protrusions 262 and 272 come into contact with the circumferential ends of the notches 243 and 253 (that is, in the above-described engagement state), the engagement protrusions 262 and 272 rotate integrally.

  The operation unit 200 configured in this way is connected to one side plate 130 as shown in FIGS. 4 and 5.

(First and second clutch devices 300, 400)
Next, the configuration of the first and second clutch devices 300 and 400 will be described in detail with reference to FIGS. 5, 7, and 8. The first clutch device 300 and the second clutch device 400 are the same in basic configuration except that the operation direction of the clutch is reversed. Therefore, the first clutch device 300 will be described as an example. And

  The first clutch device 300 is provided in one end portion of the first take-up pipe 140, and a first clutch mechanism 310 that switches transmission or non-transmission of rotation to the first take-up pipe 140 of the operation unit 200, and a first turn A second clutch mechanism 320 that switches between a state in which the intake pipe 140 is fixed to the first shaft 330 and a state in which the intake pipe 140 is released; the first shaft 330 that supports the first clutch mechanism 310 and the second clutch mechanism 320; The first clutch mechanism 310, the second clutch mechanism 320, and the case 340 that accommodates the first shaft 330 are configured. Hereinafter, each configuration of the first clutch device 300 will be described in detail.

(First clutch mechanism 310)
As shown in FIGS. 5, 7, and 8, the first clutch mechanism 310 has nine engaging portions 341 that protrude toward the center at equal intervals in the circumferential direction on the inner peripheral surface of one end portion of the case 340. It arrange | positions in the space part 342 comprised by connecting a front-end | tip. The first clutch mechanism 310 is rotatably supported by the first shaft 330 and rotates together with the first transmission member 260, and a clutch spring (clutch) that is fastened and loosened with respect to the first shaft 330. Member) 312, the three guide pins 313, and the three guide pins 313, thereby transmitting the rotation of the operation unit 200 to the first winding pipe 140 and the non-transmission position that makes the transmission impossible. And a guide washer (guide member) 314 that enables movement between the two. Hereinafter, each configuration of the first clutch mechanism 310 will be described in detail.

(Cam drive 311)
As shown in FIG. 7, the cam drive 311 includes a disk-shaped part 311b having a circular opening 311a at the center, and three insertion holes at regular intervals in the circumferential direction of the disk-shaped part 311b. 311c is formed. Further, on one surface of the cam drive 311, a pair of projecting portions 311 d and 311 e that project in the axial direction from both circumferential ends of the three insertion holes 311 c are formed. As shown in FIG. 8A, the side surface of one protrusion 311d of the pair of protrusions 311d and 311e is a cam surface 311d-1 that guides the movement of the three guide pins 313. The upper end of the protruding portion 311e is an inclined surface 311e-1 that is inclined obliquely downward toward the outer side in the circumferential direction. An edge 311f of the opening 311a protrudes from one surface of the cam drive 311 in the axial direction, and a pressing portion 311g protrudes from the edge 311f toward the center. The pressing portion 311g is provided between one pair of the protruding portions 311d and 311e.

(Clutch spring 312)
As shown in FIG. 7, the clutch spring 312 has a coil shape, and both end portions 312a and 312b of the clutch spring 312 protrude radially outward at positions spaced apart by 180 degrees in the circumferential direction. ing.

(Guide pin 313)
As shown in FIG. 7, three guide pins 313 are provided, each having a cylindrical shape.

(Guide washer 314)
As shown in FIG. 7, the guide washer 314 includes a disk-shaped portion 314b having a circular opening 314a at the center, and a pair of protrusions 314c and 314d are formed from one surface of the disk-shaped portion 314b. It protrudes in the axial direction. The pair of protrusions 314c and 314d are provided at three equal intervals along the outer peripheral edge of the disk-shaped portion 314b. One protrusion 314d has a substantially rectangular shape in cross section, and the other protrusion 314c As shown in FIG. 8A, the top portion has a trapezoidal cross-sectional shape that is an inclined surface 314c-1 joined to the inclined surface 311e-1 of the protruding portion 311e of the cam drive 311. In addition, two first and second pressing portions 314e and 314f that protrude in the axial direction from one surface of the disk-shaped portion 314b are formed at the edge of the opening 314a, and these first and second pressing portions are formed. As shown in FIG. 8A, the positions of 314e and 314f are positions where the angles at which they are separated from each other are shifted by a predetermined angle in the circumferential direction from 180 degrees.

  As shown in FIGS. 5 and 8A, each member configured as described above is configured such that the disk-like portion 311b of the cam drive 311 abuts against the side surface of the end portion of the case 340, and a pair of protruding portions 311d, 311e is arranged in the space part 342, and a guide washer 314 is arranged in the innermost part of the space part 342. A clutch spring 312 and three guide pins 313 are arranged between the cam drive 311 and the guide washer 314, respectively.

  As shown in FIGS. 5 and 8A, the first shaft 330 is inserted into the opening 311 a of the cam drive 311, so that the cam drive 311 is rotatably supported by the first shaft 330. Has been.

  As shown in FIG. 8A, the three engagement protrusions 262 of the first transmission member 260 are inserted into the three insertion holes 311 c of the cam drive 311, respectively. Engages with the protrusions 311d and 311e, and the first transmission member 260 and the cam drive 311 rotate together.

  As shown in FIG. 5, the first shaft 330 is inserted into the opening 314 a of the guide washer 314, so that the guide washer 314 is rotatably supported by the first shaft 330. Further, the protrusions 314 c and 314 d of the guide washer 314 and the first and second pressing portions 314 e and 314 f are disposed on the side facing the cam drive 311. As shown in FIG. 8A, the pair of protrusions 314c and 314d of the guide washer 314 and the pair of protrusions 311d and 311e of the cam drive 311 are alternately arranged. The guide washer 314 and the cam drive 311 can rotate relative to each other. However, when the inclined surface 314c-1 of the guide washer 314 and the inclined surface 311e-1 of the cam drive 311 are joined, the relative rotation is regulated. ing.

  As shown in FIGS. 5 and 8A, the coil-shaped clutch spring 312 has a first shaft 330 inserted through the hollow portion thereof, and is supported by the first shaft 330 so as to be fastened and relaxed. Yes. The clutch spring 312 is disposed between the first shaft 330 and the opening 311 a of the cam drive 311, and two space portions are defined by both end portions 312 a and 312 b of the clutch spring 312 and the cam drive 311. . A pressing portion 311g of the cam drive 311 and a first pressing portion 314e of the guide washer 314 are disposed in one of the two space portions, and a second pressing portion 314f of the guide washer 314 is disposed in the other space portion. Is placed. The pressing portion 311g of the cam drive 311 can press the end 312a of the clutch spring 312, and the first and second pressing portions 314e and 314f of the guide washer 314 can press the end 312b of the clutch spring 312 respectively. . The pressing portion 311g of the cam drive 311 and the first pressing portion 314e of the guide washer 314 press the end portions 312a and 312b in the direction of relaxing the clutch spring 312, and the second pressing portion 314f of the guide washer 314 is the clutch spring. The end 312b is pressed in the direction in which the 312 is fastened. In addition, a slight gap is formed between the pressing portion 311g of the cam drive 311 and the end portion 312a of the clutch spring 312 at a position where the second pressing portion 314f of the guide washer 314 contacts the end portion 312b of the clutch spring 312. It has become so. When the pressing portion 311g moves through the gap, the guide pin 313 can be moved to the non-engagement position as will be described later.

  As shown in FIG. 8A, the three guide pins 313 rotate integrally between the pair of protrusions 314c and 314d of the guide washer 314 in the circumferential direction but relatively move in the radial direction. It is arranged. The movement of the guide pin 313 in the radially outward direction is performed by moving along the cam surface 311d-1 of the cam drive 311. Each guide pin 313 is in the non-transmitting state in which the guide pin 313 contacts the edge 311f of the opening 311a of the cam drive 311 and does not engage with the engaging portion 341 of the case 340 in the state of being most moved in the radial center direction. On the other hand, each guide pin 313 is in the transmission state in which the guide pin 313 contacts the inner peripheral surface of the case 340 and engages with the engaging portion 341 with the guide pin 313 moved most radially outward.

(Second clutch mechanism 320)
Next, the configuration of the second clutch mechanism 320 will be described with reference to FIG.
The second clutch mechanism 320 includes a cam drum 322, a ball 323, a cam drum clutch spring 324, a driving side shaft 325, and a driven side shaft 326, and is disposed in the case 340. The cam drum 322 is disposed so as to be rotatable with respect to the case 340, and a guide groove 322 a is formed on the outer peripheral surface of the cam drum 322. As shown in FIG. 9, the guide groove 322a includes an endless loop 322b extending endlessly in the circumferential direction of the cam drum 322, and a branch loop 322c branched from the endless loop 322b. The branch loop 322c includes stop portions 322d and A locking portion 322e is formed. A ball 323 that can slide in the guide groove 322a is provided, and the ball 323 can slide in the axial direction in a longitudinal groove (not shown) formed on the inner peripheral surface of the case 340 at the same time. The ball 323 rotates with the case 340 and moves in the guide groove 322a.

  A cam drum clutch spring 324 is provided at the rear end of the cam drum 322 as shown in FIG. The cam drum clutch spring 324 is provided on the rear end side of the cam drum 322 so as to be integrated with the drive side shaft 325 and is concentrically arranged along the drive side shaft 325 in the axial direction so as to be substantially the same as the drive side shaft 325. It is wound around the peripheral surface with the non-driving side shaft 326 having a peripheral surface with a diameter. The non-driving side shaft 326 is non-rotatable because it is fitted to the fixed first shaft 330 extending inside the cam drum 322 so as not to be relatively rotatable. A claw extending integrally with the non-drive side shaft 326 passes through the drive side shaft 325 and locks the drive side shaft 325 so that it cannot move in the axial direction and can rotate relatively. One end of the cam drum clutch spring 324 is connected to the drive side shaft 325, and the other end of the cam drum clutch spring 324 is regulated by the end of the non-drive side shaft 326.

  When rotation in the unwinding direction of the screen is input to the cam drum 322, the driving side shaft 325 rotates in the same direction, the cam drum clutch spring 324 relaxes, and the driving side shaft 325 is allowed to rotate in the same direction. In order to release the connection between the side shaft 325 and the non-drive side shaft 326, the drive side shaft 325 can rotate with respect to the non-drive side shaft 326.

Conversely, when the rotation of the screen winding direction to cam drum 322 is input, the drive-side shaft 325 even attempts to rotate in the same direction, with the cam drum clutch spring 324 to tighten the drive side shaft 325 and the non-driving side shaft 326 Therefore , the driving side shaft 325 is connected to the non-driving side shaft 326 and rotation is prohibited.

The operation of the second clutch mechanism 320 configured as described above will be described with reference to FIG.
In the stop state of the first winding pipe 140, the ball 323 is positioned at the stop portion 322d of the guide groove 322 as shown in FIG.

  When rotation in the unwinding direction of the screen is transmitted to the first winding pipe 140 from the stopped state of the first winding pipe 140, the case 340 rotates integrally with the first winding pipe 140. When the case 340 rotates, the ball 323 that rotates together with the case 340 starts from the stop 322d, proceeds slightly through the endless loop 322b, and then enters the branch loop 322c again, as shown in FIG. 9B. Move to section 322e. After reaching the locking portion 322e, the cam drum 322 is allowed to rotate due to the relaxation of the cam drum clutch spring 324, so that the first take-up pipe 140 is allowed to rotate. Thus, the first screen 160 is lowered.

When transmission of rotation in the screen unwinding direction of the first winding pipe 140 is stopped, the first winding pipe 140 is rotated in the screen winding direction by the urging force of the winding spring. As a result, as shown in FIG. 9C, the ball 323 advances from the locking portion 322e to the stop portion 322d by the case 340 rotating together with the take-up pipe 140, and the first take-up pipe 140 stops. At this time, the rotation of the cam drum 322 is prohibited by the cam drum clutch spring 324 takes tightening the drive side shaft 325 and the non-driving side shaft 326.

  When a slight rotation in the screen unwinding direction (that is, a rotation within 195 ° in FIG. 9D) is transmitted to the first winding pipe 140, it rotates with the case 340 as shown in FIG. 9D. The ball 323 to start departs from the stop portion 322d, enters the branch loop 322c, and reaches the front of the locking portion 322e. When transmission of rotation in the screen unwinding direction is stopped, the first winding pipe 140 rotates in the screen winding direction by the urging force of the winding spring, so that the ball 323 moves the branch loop 322c in FIG. ) Returns to the opposite direction to the arrow in FIG. 9 and reaches the endless loop 322b, and moves the endless loop 322b as shown in FIG. Thus, the first screen 160 is raised.

  When the rotation in the screen unwinding direction is transmitted to the first winding pipe 140 again, the ball 323 enters the branch loop 322c and moves to the stop portion 322d via the locking portion 322e. Here, since the rotation of the cam drum 322 is prohibited by the cam drum clutch spring 324, the first winding pipe 140 stops. During this time, rotation of the cam drum 322 is prohibited by the cam drum clutch spring 324.

  In the first clutch device 300 and the second clutch device 400 configured as described above, the first shaft 330 of the first clutch device 300 is inserted into the through hole 281e of the operation unit 200, as shown in FIGS. Further, the second shaft 430 of the second clutch device 400 is fitted into the through hole 281f of the operation unit 200, respectively. Accordingly, the first and second shafts 330 and 430 are supported by the operation unit 200 with their rotations restricted.

  In addition, the 3rd clutch mechanism 410 and the 4th clutch mechanism 420 of the 2nd clutch apparatus 400 are the 1st clutch mechanism 310 and the 2nd clutch mechanism 320 of the 1st clutch apparatus 300, as shown in FIG.8 (b). Each of them has the same configuration and operation only in that the operating directions are reversed. For this reason, in the following description of the operation of the roll screen 100, the same name is used for members having the same action, and only the reference numerals are different, and the description is omitted.

  Next, the operation of the roll screen 100 of this embodiment will be described with reference to FIGS. 12 to 27 and FIG. Note that the first winding pipe 140 and the case 340, and the second winding pipe 150 and the case 440 are connected so as to rotate together, so that they are regarded as the same in the description of the rotation direction.

(1) (first winding pipe 140: stopped at the screen upper limit position, second winding pipe 150: stopped at the screen upper limit position)
When the first screen 160 on the indoor side of the roll screen 100 is stopped at the upper limit position and the second screen 170 on the outdoor side is also stopped at the upper limit position, as shown in FIG. The guide pin 313 of the first clutch mechanism 310 disposed at 140 is not engaged with the engaging portion 341 of the case 340 and is in a non-transmitting state. Further, the first guide pin 413 of the third clutch mechanism 410 disposed on the second winding pipe 150 is not engaged with the engaging portion 441 of the case 440 and is in a non-transmitting state.

  Further, in this state, the engagement protrusions 262 and 272 of the first and second transmission members 260 and 270 are respectively applied to one ends of the notches 243 and 253 of the first and second drive members 240 and 250 of the operation unit 200. The contact state is in contact.

  At this time, in the second clutch mechanism 320 and the fourth clutch mechanism 420, as shown in FIG. 9E, the balls 323 and 423 are positioned in any one of the grooves on the endless loop 322b. The winding pipe 140 and the second winding pipe 150 are restrained from rotating at the upper limit position by a regulating means (not shown) while receiving a biasing force in the winding direction by the winding spring.

(2) (first winding pipe 140: start of descent operation, second winding pipe 150: stop at the upper limit position of the screen)
Next, when lowering the first screen 160, as shown in FIG. 13, when the operation of lowering the indoor side of the operation chain 210 in the direction of the arrow A in the figure, the pulley 220 is lowered in the first screen 160, that is, It rotates in the direction of arrow B in the figure. As a result, the intermediate gear 230 rotates in the direction of arrow C in the figure, and the first and second drive members 240 and 250 meshing with the intermediate gear 230 rotate in the direction of arrow B in the figure. As a result, the first and second transmission members 260 and 270 engaged with the first and second drive members 240 and 250 also rotate in the direction of arrow B in the figure.

  The rotations of the first and second transmission members 260 and 270 are transmitted to the cam drive 311 of the first clutch mechanism 310 and the cam drive 411 of the third clutch mechanism 410 via the engagement protrusions 262 and 272, respectively. As a result, in the first clutch mechanism 310, the cam drive 311 rotates in the direction of arrow B in FIG. 13, and the pressing portion 311g contacts and presses the first pressing portion 314e of the guide washer 314 to rotate integrally. It becomes like this. Then, the first pressing portion 314e contacts the other end 312b of the clutch spring 312, and when this is pressed, the clutch spring 312 is relaxed and the clutch spring 312 also rotates integrally in the direction of arrow B in the figure. . During this time, the guide pin 313 is pressed by the cam surface 311d-1 and moves radially outward along the cam surface 311d-1 while moving in the arrow B direction in the figure, and the case 340 is engaged. Engage with the part 341 to enter the engaged state. Accordingly, since the rotation in the screen lowering direction is transmitted to the first winding pipe 140, the second clutch mechanism 320 has the ball 323 that passes from the endless loop 322b through the branch loop 322c as shown in FIG. 9B. To move to the locking portion 322e. Thereby, the rotation of the first winding pipe 140 is allowed, and the first winding pipe 140 rotates in the screen lowering direction (the arrow B direction in the figure). Accordingly, the first screen 160 is lowered in the direction of arrow D in the drawing.

  On the other hand, also in the third clutch mechanism 410, as shown in FIG. 13, the rotation is transmitted to the cam drive 411 from the second transmission member 270, and the cam drive 411 rotates in the direction of arrow B in the figure. As a result, the guide pin 413 is pressed against the protrusion 411e of the cam drive 411. Since the protruding portion 411e only moves the guide pin 413 in the circumferential direction and not in the radial direction, the guide pin 413 remains in a non-engaged state with the case 440. At the same time, the pressing portion 411g moves in the circumferential direction by the rotation of the cam drive 411, and comes into contact with and presses the clutch spring 412. As a result, the clutch spring 412 is relaxed, and rotates together with the cam drive 411, the guide pin 413, and the guide washer 414 in the direction of arrow B in the figure, and rotates relative to the second winding pipe 150. Accordingly, since rotation is not transmitted to the second winding pipe 150, the fourth clutch mechanism 420 maintains the state where the ball 423 is positioned on the endless loop 422b as shown in FIG. 9 (e). Thereby, the 2nd winding pipe 150 maintains the state stopped at the upper limit position.

(3) (first winding pipe 140: stop of the lowering operation, second winding pipe 150: stop at the upper limit position of the screen)
Next, as shown in FIG. 14, when the operation of lowering the first screen 160 is stopped, the first clutch mechanism 310 and the second clutch mechanism 320 are in the state when the first screen 160 is being lowered. Stop. On the other hand, the third clutch mechanism 410 and the fourth clutch mechanism 420 maintain the state when the second screen 170 is stopped at the upper limit position.

(4) (first winding pipe 140: restraint of rotation by the second clutch mechanism 320, second winding pipe 150: stopped at the screen upper limit position)

  Thereafter, as shown in FIG. 15, the first winding pipe 140 rotates in the direction of arrow A in the drawing, which is the screen winding direction, by the action of the winding spring. As a result, the first take-up pipe 140 is engaged with the clutch spring until the guide pin 313 engages with the engaging portion 341 adjacent thereto from the engaging portion 341 engaged before the first take-up pipe 140 rotates. 312, the cam drive 311, the guide pin 313, and the guide washer 314 rotate relative to each other. Thereafter, when the guide pin 313 engages with the engaging portion 341, the clutch spring 312, the cam drive 311, the guide pin 313, and the guide washer 314 also rotate integrally with the first winding pipe 140 in the direction of arrow A in the figure. At this time, in the second clutch mechanism 320, as shown in FIG. 9C, the cam drum 322 rotates about 48 ° in the screen winding direction, and the ball 323 moves from the locking portion 322e to the stop portion 322d. Therefore, the first winding pipe 140 also rotates about 48 ° to wind up the first screen 160, and the rotation is restricted. As a result, the first screen 160 slightly rises in the direction of arrow B in FIG. 15 and stops.

  When the rotation of the first winding pipe 140 is transmitted to the cam drive 311 via the guide pin 313, the first transmission member 260 of the operation unit 200 that rotates integrally with the cam drive 311 also rotates. Since the engagement protrusion 262 of the first transmission member 260 is in contact with the end of the notch 243 of the first drive member 240, the first drive member 240 is integrated with the first transmission member 260 in the direction of arrow A in the figure. Rotate to. The rotation of the first driving member 240 is transmitted to the pulley 220 and the second driving member 250 through the intermediate gear 230. As a result, the second drive member 250 rotates in the direction of arrow A in the figure, but the rotation of the second drive member 250 is not transmitted to the engagement protrusion 272 of the second transmission member 270 by the idling mechanism 290. The apparatus 400 maintains the state stopped at the upper limit position.

(5) (first winding pipe 140: screen lowering operation (release of locking by the second clutch mechanism 320), second winding pipe 150: stopped at the screen upper limit position)

  Next, when lowering the first screen 160, as shown in FIG. 16, an operation of lowering the indoor side of the operation chain 210 in the direction of arrow A in the figure is performed. As a result, the pulley 220 rotates in the descending direction of the first screen 160, that is, in the direction of arrow B in the figure. Therefore, the pulley 220, the first and second drive members 240, 250 rotate in the direction of arrow B in the drawing via the intermediate gear 230, respectively. Since the engagement protrusion 262 of the first transmission member 260 is in the transmission position, the first drive member 240 and the first transmission member 260 rotate together in the direction of arrow B in the figure. On the other hand, since the engagement protrusion 272 of the second transmission member 270 is in the non-transmission position as shown in FIG. 15 immediately after the start of rotation, the second transmission member 270 does not rotate and only the second drive member 250 rotates. . Thereafter, as the second drive member 250 rotates, the engagement protrusion 272 moves to the transmission position, so that the second drive member 250 and the second transmission member 270 rotate together in the direction of arrow B in the figure. To come.

  The rotations of the first and second transmission members 260 and 270 are transmitted to the cam drive 311 of the first clutch mechanism 310 and the first cam drive 411 of the third clutch mechanism 410 via these engagement protrusions 262 and 272, respectively. The Accordingly, in the first clutch mechanism 310, the cam drive 311 rotates in the direction of arrow B in FIG. 16, and the pressing portion 311g presses the other end 312b of the clutch spring 312 together with the first pressing portion 314e of the guide washer 314. To do. Therefore, the clutch spring 312 relaxes and rotates integrally in the direction of arrow B in the figure. Further, since the guide pin 313 is engaged with the case 340, the first winding pipe 140 rotates in the clean descending direction (the arrow B direction in the figure). As shown in FIG. 9D, when the first winding pipe 140 rotates about 25 °, the ball 323 of the second clutch mechanism 320 moves from the stop portion 322d to the endless loop 322b. Therefore, the first winding pipe 140 is in a state where the restraint is released and the rotation is allowed. Due to the rotation of the first winding pipe 140 at this time, the first screen 160 is slightly lowered in the direction of arrow C in the drawing. This series of movements is performed within the rotation range of the first winding pipe 140 necessary for releasing the locking by the second clutch mechanism 320, and as shown in FIG. 9 (d), the first winding pipe 140 is moved. Is rotated in the range of about 25 ° to 195 °, the ball 323 moves to the endless loop 322b in the second clutch mechanism 320 when the rotation is stopped and the winding pipe 140 rotates in the screen winding direction. Therefore, the locking by the second clutch mechanism 320 can be released.

  On the other hand, in the third clutch mechanism 410, the first winding pipe 140 rotates at least about 25 ° from when the first winding pipe 140 starts to rotate until the restraint by the second clutch mechanism 320 is released. During this time, since the engagement protrusion 272 is in the non-transmission position by the idling mechanism 290, the rotation is not transmitted from the second drive member 250. However, after the engagement protrusion 272 moves to the transmission position, as shown in FIG. 16, the rotation is transmitted from the second transmission member 270 to the cam drive 411 so that the cam drive 411 moves in the direction of arrow B in the figure. Rotate. As a result, the guide pin 413 is pressed by the protruding portion 411d of the cam drive 411, and rotates without engaging with the second winding pipe 150. Further, since the pressing portion 411g of the cam drive 411 presses the one end portion 412a of the clutch spring 412 by the rotation of the cam drive 411, the clutch spring 412 is loosened, and is integrated with the cam drive 411, the guide pin 413, and the guide washer 414 in the drawing. It rotates in the direction of arrow B and rotates relative to the second winding pipe 150. Accordingly, since rotation is not transmitted to the second winding pipe 150, the fourth clutch mechanism 420 maintains the state where the ball 423 is positioned at the stop portion 422d as shown in FIG. 9A. Thereby, rotation of the 2nd winding pipe 150 is restrained and the 2nd winding pipe 150 maintains the state stopped at the raising position.

(6) (first winding pipe 140: stop of screen lowering operation, second winding pipe 150: stop at upper limit position of screen)
Next, as shown in FIG. 17, when the operation of lowering the first screen 160 is stopped, the first clutch mechanism 310 and the second clutch mechanism 320 are in the state (5) described above, while the third clutch The mechanism 410 and the fourth clutch mechanism 420 maintain the state when the second screen 170 is stopped at the upper limit position.

(7) (First take-up pipe 140: screen lift (rotation by take-up spring), second take-up pipe 150: stop at upper limit position of screen)

  Thereafter, as shown in FIG. 18, the first winding pipe 140 rotates in the direction of arrow A in the drawing, which is the screen winding direction, by the action of the winding spring. Since the case 340 and the guide pin 313 are in an engaged state, the guide pin 313, the guide washer 314, and the cam drive 311 rotate together with the first winding pipe 140. Then, the second pressing portion 314f of the guide washer 314 contacts the other end 312b of the clutch spring 312, and when this is pressed, the clutch spring 312 is fastened to the first shaft 330, so that the rotation of the guide washer 314 is restricted. Is done.

  At this time, in the second clutch mechanism 320, as shown in FIG. 9E, the ball 323 moves in the endless loop 322b. Therefore, the first winding pipe 140 is also allowed to rotate.

  As described above, when the rotation of the first winding pipe 140 is transmitted to the cam drive 311 via the guide pin 313, the first transmission member 260 of the operation unit 200 that rotates integrally with the cam drive 311 also rotates. . Since the engagement protrusion 262 of the first transmission member 260 is in contact with the end of the notch 243 of the first drive member 240, the first drive member 240 is integrated with the first transmission member 260 in the direction of arrow A in the figure. Rotate to. The rotation of the first drive member 240 is transmitted to the pulley 220 and the second drive member 250 via the intermediate gear 230, and the second drive member 250 rotates in the direction of arrow A in the figure.

  The rotation of the second drive member 250 is applied to the second transmission member 270 until the engagement protrusion 272 of the second transmission member 270 moves from one end of the notch 253 to the other end by the idling mechanism 290. Although not transmitted, it is transmitted when the engaging protrusion 272 contacts the other end of the notch 253, and the second drive member 250 and the second transmission member 270 rotate together. As a result, the cam drive 411 rotates in the direction of arrow A in the figure integrally with the engaging protrusion 272. At this time, the fourth clutch mechanism 420 maintains the state (6) described above.

(8) (first winding pipe 140: screen rising (disengagement with the first clutch mechanism 310), second winding pipe 150: stopping at the screen upper limit position)

  Thereafter, as shown in FIG. 19, the first winding pipe 140 rotates in the direction of arrow A in the figure, which is the unwinding direction of the screen. However, since the rotation of the guide washer 314 is restricted by the clutch spring 312, The cam drive 311 is slightly rotated by a gap formed between the guide pin 313 engaged with the 340 and the one end 312a of the clutch spring 312. As a result, the guide pin 313 moves along the cam surface 311d-1 of the cam drive 311 in the direction B (in the radial center direction) indicated by the arrow in the figure, and the engagement with the case 340 is released. Therefore, only the first winding pipe 140 is in a rotating state. By this operation, the first screen 160 is slightly wound around the first winding pipe 140 and slightly lifts in the direction of arrow C in the drawing.

  The slight rotation of the cam drive 311 is transmitted to the engagement protrusion 262 of the first transmission member 260, and the engagement protrusion 262 slightly rotates the first drive member 240 in the A direction indicated by the arrow in FIG. The rotation of the first driving member 240 is transmitted to the pulley 220 and the second driving member 250 through the intermediate gear 230. As a result, the second drive member 250 rotates in the direction of arrow A in the figure, and thereby the rotation is transmitted to the engagement protrusion 272 of the second transmission member 270 that is in contact with the notch 253 of the second drive member 250. . Therefore, the cam drive 411 of the third clutch mechanism 410 is slightly rotated integrally with the engagement protrusion 272.

  Moreover, the 2nd clutch mechanism 320 and the 4th clutch mechanism 420 are maintaining the same state as the above-mentioned (7).

(9) (first winding pipe 140: rotating in the screen winding direction, second winding pipe 150: stopping at the screen upper limit position)
As shown in FIG. 20, the first take-up pipe 140 disengaged from the first clutch mechanism 310 as in (8) above is in the direction of arrow A in the figure due to the urging force of the take-up spring. Rotates in the screen winding direction. Thereby, since the 1st winding pipe 140 winds up the 1st screen 160, the 1st screen 160 raises in the arrow B direction in a figure. At this time, the second clutch mechanism 320 and the fourth clutch mechanism 420 maintain the same state as in the above (8).

(10) (First winding pipe 140: Stopped while the screen is moving up and down, Second winding pipe 150: Stopped at the screen upper limit position)
When the first winding pipe 140 is stopped while the first screen 160 is moving up and down, and the second winding pipe 150 is stopped at the upper limit position of the second screen 170, the first clutch device 300, the second The clutch device 400 and the operation unit 200 are in the same state as (4) described above, as shown in FIG. That is, the guide pin 313 is in the transmission position where it is engaged with the engaging portion 341 of the case 340, and the guide pin 413 is in the non-transmission position where it is not engaged with the engaging portion 441 of the case 440. Further, in the second clutch mechanism 320, the ball 323 is positioned on the stop portion 322d of the cam drum 322, and in the fourth clutch mechanism 420, the ball 423 is positioned on one of the grooves on the endless loop 422b of the cam drum 422.

(11) (First winding pipe 140: Stopped while the screen is raised and lowered, Second winding pipe 150: Start of screen lowering operation)
Next, when lowering the second screen 170, as shown in FIG. 22, when the operation of lowering the outdoor side of the operation chain 210 in the direction of the arrow A in the figure, the pulley 220 moves down the second screen 170, that is, It rotates in the direction of arrow B in the figure. As a result, the intermediate gear 230 rotates in the direction of arrow C in the figure, and the first and second drive members 240 and 250 meshing with the intermediate gear 230 rotate in the direction of arrow B in the figure. During the rotation of the first and second driving members 240 and 250, the rotation of the first and second driving members 240 and 250 is not transmitted to the first and second transmission members 260 and 270 by the idling mechanism 290. Only the two drive members 240, 250 rotate. At this time, the second clutch mechanism 320 and the fourth clutch mechanism 420 are in the same state as the above (10).

(12) (First take-up pipe 140: Stop in the middle of raising and lowering the screen, Second take-up pipe 150: Continue the screen lowering operation)
Subsequently, as shown in FIG. 23, when the operation of lowering the outdoor side of the operation chain 210 in the direction of arrow A in the figure is continued, the second drive member 250 and the second transmission member 270 are engaged, and these are integrated. It rotates in the direction of arrow B in the figure. As a result, the cam drive 411 rotates integrally with the engagement protrusion 272 of the second transmission member 270.

  On the other hand, the rotation of the first drive member 250 is not continuously transmitted to the first transmission member 260 by the action of the idling mechanism 290, and only the first drive member 250 rotates. At this time, the second clutch mechanism 320 and the fourth clutch mechanism 420 are in the same state as the above (10).

(13) (First take-up pipe 140: Stop in the middle of raising and lowering the screen, Second take-up pipe 150: Continue the screen lowering operation)
Next, as shown in FIG. 24, when the operation of lowering the outdoor side of the operation chain 210 in the direction of arrow A in the figure is continued, the guide pin 413 is moved to the cam surface 411d-1 by the rotation of the cam drive 411 in the direction of arrow B in the figure. Is pressed in the direction of arrow C in the figure. As a result, the guide pin 413 moves radially outward along the cam surface 411d-1 while moving in the same direction as the cam surface 411d-1, and comes into contact with the inner peripheral surface of the case 440.

  On the other hand, as shown in FIG. 24, the first drive member 240 engages with the first transmission member 260, and these rotate integrally. Therefore, also in the first clutch mechanism 310, the rotation is transmitted from the first transmission member 260 to the cam drive 311 so that the cam drive 311 rotates in the direction of arrow B in the figure. At this time, the second clutch mechanism 320 and the fourth clutch mechanism 420 are in the same state as the above (10).

(14) (First winding pipe 140: Stopped while the screen is being raised and lowered, Second winding pipe 150: Start of lowering the second screen 170)
25, when the operation of lowering the outdoor side of the operation chain 210 in the direction of arrow A in the figure is continued, the guide pin 413 of the third clutch mechanism 410 is in contact with the inner peripheral surface of the case 440 and the case 440 To the engagement portion 441 and engage with the case 440. Thereafter, the case 440 and the second winding pipe 150 engaged therewith rotate integrally in the direction of arrow B in the figure. As a result, the second screen 170 is unwound from the second winding pipe 150 and begins to descend in the direction of arrow C in the figure. At this time, in the fourth clutch mechanism 420, as shown in FIG. 9B, the ball 323 moves from the endless loop 322b via the branch loop 322c toward the locking portion 322e. Accordingly, the second winding pipe 150 is allowed to rotate in the screen unwinding direction.

  On the other hand, in the first clutch mechanism 310, only the engagement protrusion 262 and the cam drive 311 rotate, and the inclined surface 311e-1 of the cam drive 311 is in contact with the inclined surface 314c-1 of the guide washer 314. . At this time, the second clutch mechanism 320 is in the same state as (13) described above.

(15) (First winding pipe 140: Stopped while the screen is raised and lowered, Second winding pipe 150: Start of lowering the second screen 170)
26, when the operation of lowering the outdoor side of the operation chain 210 in the direction of arrow A in the drawing is continued, the third clutch mechanism 410 and the second winding pipe 150 engaged therewith are shown. The second screen 170 is unwound from the second winding pipe 150 and continues to descend in the direction of arrow C in the figure. At this time, as shown in FIG. 9B, in the fourth clutch mechanism 420, the ball 323 moves further in the direction of the locking portion 322e than in the above (14).

  On the other hand, the first clutch mechanism 310 has a radial direction in which the guide pin 313 is in the direction of arrow D in the figure by the cooperation of the guide washer 314 that rotates integrally with the cam drive 311 and the engaging portion 341 of the first winding pipe 140. It moves in the center direction and the engagement with the engaging portion 341 is released. As a result, the first clutch mechanism 310 and the first take-up pipe 140 rotate relative to each other. At this time, the second clutch mechanism 320 is in the same state as (14) described above.

(16) (First take-up pipe 140: Stop in the middle of raising and lowering the screen, Second take-up pipe 150: Continue lowering of the second screen 170)
27, when the operation of lowering the outdoor side of the operation chain 210 in the direction of arrow A in the figure is continued, the third clutch mechanism 410 and the second take-up pipe 150 engaged therewith are shown. The second screen 170 is unwound from the second winding pipe 150 and continues to descend in the direction of arrow C in the figure. At this time, in the fourth clutch mechanism 420, as shown in FIG. 9B, the ball 323 completely moves to the locking portion 322e.

  On the other hand, in the first clutch mechanism 310, the first clutch mechanism 310 and the first winding pipe 140 continue to rotate relative to each other. At this time, the second clutch mechanism 320 is in the same state as (15) described above.

  As described above, according to the present embodiment, the cam drives 311 and 411 are allowed to rotate by the clutch springs 312 and 412 when rotating in one direction by the rotation input from the pulley 220 by the operation of the operation chain 210. Since the guide pins 313 and 413 move to the transmission position, the first or second screen 160 or 170 can be moved up or down according to the operation amount of the operation chain 210. Further, when the operation chain 210 is not operated and no rotation is transmitted from the pulley 220, the rotation of the cam drives 311 and 411 is restricted by the clutch springs 312 and 412 and the guide pins 313 and 414 are moved to the non-transmission position. Therefore, the first or second screen 160, 170 is raised by, for example, the urging force of a winding spring built in the first or second winding pipe 140, 150, or the first or second screen 160, 170 itself. It can be lowered by its own weight. Thus, the integral or relative operation switching between the cam drives 311 and 411 and the clutch springs 312 and 412 is ensured.

  Further, by using the clutch springs 312 and 412, when rotation in one direction is input to the clutch springs 312 and 412 from the cam drives 311 and 411, the guide pins 313 and 413 are moved to the transmission position, and then the clutch The springs 312 and 412 rotate together with the cam drives 311 and 411 and the first and second winding pipes 140 and 150 while loosening from the first and second shafts 330 and 430, respectively. On the other hand, when rotation in the other direction is transmitted from the cam drives 311 and 411 to the clutch springs 312 and 412, they are fastened to the first and second shafts 330 and 430, respectively, so that the rotation of the cam drives 311 and 411 is restricted. Then, the guide pins 313 and 413 are moved to the non-transmission position. As a result, the first clutch mechanism 310 and the third clutch mechanism 410 and the first and second winding pipes 140 and 150 can be rotated relative to each other. Further, when rotation in the other direction is transmitted from the pulley 220, the clutch springs 312 and 412 are loosened from the first and second shafts 330 and 430, respectively, and the cam drives 311 and 411 are rotated in the other direction to guide the guide pin 313. , 413 move to the non-transmission position. As a result, the first and third clutch mechanisms 310 and 410 and the first and second winding pipes 140 and 150 can be rotated relative to each other.

  When the pulley 220 rotates in one direction, the guide pins 313 and 413 are in the transmission position on the first and second winding pipes 140 and 150 side, and the other first and second winding pipes 140 and 150 are on the other side. On the side, the guide pins 313 and 413 are in the non-transmission position. Therefore, the rotation of the pulley 220 is transmitted to one of the first and second winding pipes 140 and 150, and the rotation of the pulley 220 is not transmitted to the other first and second winding pipes 140 and 150. Therefore, the winding pipe to which the rotation is transmitted according to the rotation direction of one pulley 220 can be selected.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. is there.

  In the above-described embodiment, the roll screen has been described as an example. However, an arbitrary blind such as a horizontal blind having a plurality of shielding materials, a roman shade, or a pleated screen can be used.

140 First winding pipe (rotary shaft)
150 Second winding pipe (rotating shaft)
210 Operation chain (operation member)
220 Pulley 240 First drive member (drive gear)
250 Second drive member (drive gear)
311d-1, 411d-1 Cam surface (guide member)
312 and 412 Clutch spring (clutch member)
313, 413 Guide pin (engagement member)
314, 414 Guide washers (guide members)
330, 430 First and second shafts (fixed bodies)

Claims (4)

Provided between a pulley (220) that is rotationally driven by the operating member (210) and a rotary shaft (140, 150) that raises or lowers the shielding material in accordance with the direction of rotation. A blind clutch device that switches between a transmission state transmitted to a shaft body and a non-transmission state in which rotation of the pulley is not transmitted to the rotary shaft body,
It is movable between a transmission position that enables transmission of rotation between the pulley and the rotary shaft body, and a non-transmission position that disables transmission of rotation between the pulley and the rotary shaft body. Engaging members (313, 413);
Cam drives (311 and 411) having cam surfaces (311d-1, 411d-1) that rotate by the rotation of the pulley or the rotary shaft and guide and move the engaging member to the transmission position or the non-transmission position. When,
A guide washer having a protrusion that rotates relative to or integrally with the cam drive and cooperates with a cam surface of the cam drive to guide and move the engaging member to the transmission position or the non-transmission position;
A clutch member (312 and 412) that switches between an allowable state in which rotation of the pulley , the cam drive, and the guide washer is allowed and a non-permitted state in which rotation of the pulley and the guide washer is not allowed. Is switched to a permissible state when rotating in one direction, allowing the cam drive and the guide washer to rotate and moving the engagement member to the transmission position, and not rotating when rotating the rotating shaft in the other direction. And a clutch member that restricts rotation of the guide washer and moves the engagement member to a non-transmission position when the cam drive rotates in the restricted state . The clutch member is switched to an allowable state when the pulley rotates in the other direction, and the engagement member is moved to a non-transmission position to rotate the pulley , the cam drive, and the guide washer. The blind clutch device according to claim 1. The clutch member, said provided between the cam drive and the guide washer and the cam drive and a fixed member for rotatably supporting the guide washers (330), the said guide washer utilizing the fastening and loosening 3. The blind clutch device according to claim 1, wherein the blind clutch device is a clutch spring that switches between connection and non-connection with a fixed body.   The two rotating shaft bodies are arranged side by side, and the rotation of the pulley is transmitted to each of the two rotating shaft bodies via a drive gear (240, 250). 4. The blind clutch device according to any one of 3 above.