JP7679336B2 - Operating device, operating method - Google Patents

Description

This embodiment relates to an operating device for a shading device.

A conventional shielding device having an operating device is disclosed in the following Patent Document 1. The shielding device disclosed in Patent Document 1 includes a first drive shaft rotatably supported within a head box and capable of moving a first moving member, a second drive shaft rotatably supported within the head box and capable of moving a second moving member, a first pulley capable of rotatably driving the first drive shaft, and a second pulley capable of rotatably driving the second drive shaft. The first shielding material is raised and lowered by operating a first operating cord that is provided so that it can be wound and unwound by the first pulley, and the second shielding material is raised and lowered by operating a second operating cord that is provided so that it can be wound and unwound by the second pulley.

With this type of shielding device, the first pulley and the second pulley can be arranged side by side in the left-right direction, so the hanging position of the first operating cord and the hanging position of the second operating cord can be made different in the left-right direction, and this allows the two types of operating cords that open and close the first shielding material and the second shielding material to be hung from the head box in an easily distinguishable manner.

JP 2020-20132 A

However, such a shielding device requires two first and second pulleys to rotate the first and second drive shafts, and two operating cords to rotate the first and second pulleys. Although the hanging positions of the two operating cords can be made different in the left and right direction, depending on the method of operating the operating cords, there is a possibility that the two operating cords may become entangled or interfere with each other, so there was a demand for improved operability.

The present invention has been made to solve the above-mentioned problems, and aims to provide technology that can improve operability.

In order to solve the above-mentioned problems, one aspect of the present invention is characterized in that an operating device for operating the first and second moving members of a shading device includes an operating unit capable of switching the shading device between a first state for operating the first moving member and a second state for operating the second moving member.

The present invention can improve the operability of the operation code.

FIG. 2 is a front view showing the configuration of a shading device according to an embodiment. 1 is a schematic plan view perspective view showing a configuration of a shading device according to an embodiment. FIG. 2 is a plan view showing an internal configuration of an operation unit of the shading device according to the embodiment. 4 is a cross-sectional view taken along line AA shown in FIG. 3. 4 is a cross-sectional view taken along line BB shown in FIG. 3. 4 is a cross-sectional view taken along line BB of FIG. 3 when the operation cord of the operation unit is pulled. 4 is a cross-sectional view taken along line CC shown in FIG. 3. 4 is a cross-sectional view taken along line DD shown in FIG. 3. 4 is a cross-sectional view taken along line E-E shown in FIG. 3. 4 is a cross-sectional view taken along line FF shown in FIG. 3. FIG. 11 is a perspective view showing the operation unit in a second driving state. FIG. 4 is a perspective view showing the operation unit in a first driving state. 13 is a bottom view for explaining the transmission of driving force in the operation unit in the second driving state. FIG. 13 is a bottom view for explaining transmission of driving force in the operation unit in the first driving state. FIG. FIG. 13 is a front view of the shading device according to the embodiment, with the bottom rail in the lowest position and the intermediate bar in the intermediate position. 11 is a front view of the shading device in a state where the operation cord of the operation unit is pulled in a first drive state. FIG. 13 is a front view of the shading device in a state where the operation cord of the operation unit is pulled in the second drive state. FIG.

Below, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a shading device to which the present invention is applied to a pleated screen equipped with two types of screens that can be raised and lowered as shading materials will be described as an example. In this embodiment, the surface facing the room when the shading device is installed will be referred to as the front, the surface facing the outside of the room as the back, the direction consisting of the front and back as the front-to-rear direction, and the longitudinal direction of the shading device as the left-to-right direction. In this specification and drawings, components that have substantially the same functions will be given the same reference numerals to avoid redundant description.

(Overall composition)
First, the overall configuration of the shading device according to this embodiment will be described. Fig. 1 is a front view showing the configuration of the shading device according to this embodiment, and Fig. 2 is a schematic plan view perspective view thereof. Note that Fig. 1 shows the shading device in a state where the bottom rail is lowered to the lowest position, and only the inside of the head box is shown.

As shown in Figures 1 and 2, the shading device 1 according to this embodiment includes a head box 2, a bottom rail 31 as a first moving member, two lifting cords 32 formed in the shape of strings or tapes, a screen 33 as a first shading material, an intermediate bar 41 as a second moving member, two dimmer cords 42 formed in the shape of strings or tapes, a screen 43 as a second shading material, and an operation unit 5.

The head box 2 is fixed to a window frame (not shown) via a bracket 21 and is formed in a long box shape with an internal storage space. The head box 2 contains a first drive shaft 201a, two first winding drums 202a, a first stopper device 203a, a first brake device 204a, a second drive shaft 201b, two second winding drums 202b, a second stopper device 203b, a second brake device 204b, and an interlocking gear 205.

The first drive shaft 201a, the two first winding drums 202a, the first stopper device 203a, and the first brake device 204a constitute a first drive system that raises and lowers the bottom rail 31. The second drive shaft 201b, the two second winding drums 202b, the second stopper device 203b, and the second brake device 204b constitute a second drive system that raises and lowers the intermediate bar 41. The interlocking gear 205 is configured to interlock the second drive system with the first drive system under a predetermined condition. In this embodiment, the first drive system is arranged on the rear side, and the second drive system is arranged on the front side, and the first drive system and the second drive system are arranged side by side with their positions different from each other in the front-rear direction. For example, the first drive system and the second drive system may be arranged side by side with their positions different from each other in the vertical direction, and the arrangement of the first drive system and the second drive system may be reversed in the front-rear direction or the vertical direction.

The first and second drive shafts 201a and 201b are each a rectangular columnar member extending in the left-right direction, and are supported in the head box 2 so that they can rotate with their axial center direction facing the left-right direction. Here, the axial center of the first drive shaft 201a is located at the same position as and rearward of the axial center of the second drive shaft 201b in the vertical direction, and the positions of the axial centers are different in the front-rear direction. In the following description, the axial center of the first drive shaft 201a is referred to as the first axial center, and the axial center of the second drive shaft 201b is referred to as the second axial center.

The two first winding drums 202a are each inserted through the first drive shaft 201a so as to rotate integrally with the first drive shaft 201a, and one end of the corresponding one of the two lifting cords 32 is connected to the first drive shaft 201a so as to rotate integrally with the first drive shaft 201a. The two second winding drums 202b are each inserted through the second drive shaft 201b so as to rotate integrally with the second drive shaft 201b, and one end of the corresponding one of the two light control cords 42 is connected to the second drive shaft 201b so as to rotate integrally with the second drive shaft 201b. The first stopper device 203a restricts the rotation of the first drive shaft 201a. The second stopper device 203b restricts the rotation of the second drive shaft 201b. The first brake device 204a decelerates the rotation of the first drive shaft 201a. The second brake device 204b decelerates the rotation of the second drive shaft 201b.

The bottom rail 31 is a member formed long in the left-right direction, to which the other ends of the two lifting cords 32 are connected and suspended from the head box 2 so as to be located at the lowest end of the shading device 1. The intermediate bar 41 is a member formed long in the left-right direction, to which the other ends of the two dimmer cords 42 are connected and suspended from the head box 2 so as to be located between the head box 2 and the bottom rail 31 in the vertical direction. The screen 33 is a shielding member whose upper end is connected to the lower surface of the intermediate bar 41 and whose lower end is connected to the upper surface of the bottom rail 31, formed in a pleat shape that can be folded in the vertical direction, and through which the two lifting cords 32 are partially inserted in the vertical direction. The screen 43 is a shielding member whose upper end is connected to the lower surface of the head box 2 and whose lower end is connected to the upper surface of the intermediate bar 41, formed in a pleat shape that can be folded in the vertical direction, and through which the two dimmer cords 42 are partially inserted in the vertical direction.

As shown in FIG. 2, the operation unit 5 is provided at one of the left and right ends of the head box 2, and at the right end in this embodiment. The operation unit 5 includes a housing 50 having an internal storage space and consisting of three detachable housing parts 50a to 50c (see FIG. 7, etc.), a first output shaft 51a (see FIG. 8) rotatably supported by the housing part 50c, a second output shaft 51b (see FIG. 7) rotatably supported by the housing parts 50b and 50c, and a pulley 52 that can selectively rotate these output shafts. The first output shaft 51a is connected to the first drive shaft 201a so that its axis is concentric with the first axis, and the second output shaft 51b is connected to the second drive shaft 201b so that its axis is concentric with the second axis.

(Detailed configuration of operation unit 5)
The configuration of the operation unit 5 will be described in detail below with reference to Figs. 3 to 11. Fig. 3 is a plan view showing the internal configuration of the operation unit according to this embodiment. Figs. 4 to 10 are cross-sectional views taken along line A-A, line B-B, a cross-sectional view equivalent to the cross-section taken along line B-B in a state in which the operation cord is pulled down, line C-C, line D-D, line E-E, and line F-F in Fig. 3, respectively. Figs. 11 and 12 are perspective views showing the operation unit in the second drive state and the first drive state, respectively.

As shown in FIG. 3, in addition to the first output shaft 51a, the second output shaft 51b, and the pulley 52 described above, the operation unit 5 includes an operation part 53, a clutch mechanism 54, a transmission shaft 55, a connecting member 56, a first receiving member 57a, a second receiving member 57b, an input gear 58a, an intermediate gear 58c, an output gear 58b, and a switching interlocking mechanism 59. Each of the above components will be described below.

(Pulley 52)
As shown in Fig. 4 and Fig. 5, the pulley 52 has a string-shaped operating cord 531 connected to its outer periphery so that it can be wound and unwound, and is rotatably supported by the fixed shaft 501 of the housing 50a. The pulley 52 has a spiral spring 521 provided therein. One end of the spiral spring 521 is connected to the pulley 52 and the other end is connected to the fixed shaft 501, and the spiral spring 521 constantly applies a biasing force to the pulley 52 in the winding direction in which the operating cord 531 is wound. As a result, when the operator pulls down the operating cord 531 by a predetermined amount or more, the operating cord 531 is unwound from the pulley 52 and the pulley 52 rotates as shown in Fig. 6, and the spiral spring 521 is reduced in diameter in response to the rotation. This rotational driving force is transmitted to the transmission shaft 55 via the clutch mechanism 54. Thereafter, when the operator releases the pulling of the operating cord 531 by, for example, releasing the hand, the pulley 52 rotates in the reverse direction due to the restoring force of the power spring 521, and the operating cord 531 is wound up.

(Operation unit 53)
As shown in Fig. 4, the operation unit 53 includes an operation cord 531, a hollow cylindrical switching operation unit 532, and a hollow cylindrical operation rod 533. As shown in Fig. 1, a hollow cylindrical gripping portion 534 for an operator to grip is formed at the lower end of the operation rod 533, and a cord stopper 535 is located at the lower end. As shown in Fig. 4, one end of the operation cord 531 is connected to the pulley 52, and the other end hangs down from the pulley 52, and passes through the switching operation unit 532, the operation rod 533, and the gripping portion 534 to be connected to the cord stopper 535. Although the operation cord 531 is biased in the winding direction by the biasing force of the main spring 521, the cord stopper 535 abuts against the lower end of the gripping portion 534, preventing further winding of the operation cord 531. As a result, when the cord stopper 535 is pulled away from the gripping portion 534, the operating cord 531 is unwound from the pulley 52, allowing the pulley 52 to rotate. When the operating cord 531 is released after being pulled down by a predetermined amount or more, the operating cord 531 is wound around the pulley 52, and the cord stopper 535 and the gripping portion 534 come into contact with each other again.

The switching operation unit 532 is supported at its upper end by the housing units 50a and 50b so as to be rotatable around the axis. A protruding piece that protrudes rearward is formed at the upper end, and a cylindrical connecting pin 532a extending in the vertical direction is provided on the upper surface of the protruding piece. The switching operation unit 532 is connected to the switching transmission unit 591 of the switching interlocking mechanism 59 via this connecting pin 532a, and the switching interlocking mechanism 59 is interlocked in response to the rotation operation of the switching operation unit 532. The operating rod 533 is connected at its upper end to the switching operation unit 532 via the joint unit 536 so as to be rotatable together with the switching operation unit 532. This allows the operator to rotate the switching operation unit 532 via the operating rod 533 and the joint unit 536 by rotating the grip unit 534.

(Clutch mechanism 54)
The clutch mechanism 54 transmits only the rotation of the pulley 52 in one direction to the transmission shaft 55, and has an interlocking member 541 as shown in FIG. 8. As shown in FIG. 8 and FIG. 9, the interlocking member 541 is connected to a shaft 542 whose axis is concentric with the first output shaft 51a so as to be rotatable together with the shaft 542. When the operating cord 531 is pulled down and the pulley 52 rotates in one direction (hereinafter referred to as the unwinding direction), the interlocking member 541 rotates in the same direction together with the shaft 542 in conjunction with the rotation. On the other hand, when the pulley 52 rotates in the winding direction opposite to the unwinding direction, the interlocking member 541 is not interlocked with the rotation and the shaft 542 does not rotate either. Therefore, only the pulley 52 rotates idly. As a result, the clutch mechanism 54 can rotate the shaft 542 only when the operating cord 531 is pulled down.

(Transmission shaft 55)
8, the transmission shaft 55 is an elongated member that extends in the left-right direction and has an axis that is concentric with the first output shaft 51a, and the shaft 542 is inserted into one end of the transmission shaft 55 so as to rotate together with the first output shaft 51a. The other end of the transmission shaft 55 is inserted into the first output shaft 51a so as to rotate relatively thereto, and the transmission shaft 55 rotates together with the first output shaft 51a only when the operation unit 5 is in a first drive state, which will be described later.

(Connecting member 56)
As shown in FIG. 8, the connecting member 56 is formed in a substantially ring shape through which the transmission shaft 55 is inserted so as to be rotatable together with the shaft center, and is connected to the transmission shaft 55 so as to be slidable along the axial direction (left-right direction). The connecting member 56 is located between the first and second receiving members 57a, 57b, and when switched to a first position slid to the left in the left-right direction in the figure, it is connected to the first receiving member 57a, and when switched to a second position slid to the right in the left-right direction in the figure, it is connected to the second receiving member 57b. By this connection, the connecting member 56 can be connected to either the first or second output shaft 51a, 51b via the connected receiving member so as to be able to transmit the rotational driving force of the transmission shaft 55. When the connecting member 56 is switched to the first position and connected to the first receiving member 57a, the operation unit 5 is in a first driving state. On the other hand, when the connecting member 56 is switched to the second position and connected to the second receiving member 57b, the operation unit 5 is in a second driving state.

As shown in FIG. 11, a plurality of engagement teeth 561 that protrude outward from both left and right side surfaces of the connecting member 56 are provided. The engagement teeth 561 on both sides have inclined surfaces that slope in the circumferential direction and are generally triangular in shape, and are formed to be symmetrical with respect to the left-right center of the connecting member 56. The connection between the connecting member 56 and the first and second receiving members 57a, 57b using the engagement teeth 561 will be described in detail later.

8 and 10, the connecting member 56 has a groove 562 formed by uniformly recessing the circumferential surface of the central portion in the left-right direction. A connecting member 60 for connecting the switching conversion part 592 of the switching interlocking mechanism 59 to the connecting member 56, which will be described later, can be fitted into the groove 562. The connecting member 60 is supported in the housing part 50b so as to be slidable in the left-right direction, as shown in FIG. 10. The connecting member 60 has a curved part 61 that is U-shaped and opens upward, and is connected to the connecting member 56 by fitting the curved part 61 into the groove 562. In this state, a part of the connecting member 56 is located inside the arc formed by the curved part 61 so as to be relatively rotatable. In addition, a connecting hole 62 is formed in the lower part of the connecting member 60, into which a cylindrical connecting pin 592a extending in the up-down direction provided in the switching conversion part 592 of the switching interlocking mechanism 59 is rotatably inserted. When the connecting pin 592a is inserted into the connecting hole 62, the switching conversion part 592 of the switching interlocking mechanism 59 is connected to the connecting member 60. Therefore, the switching conversion part 592 and the connecting member 56 are connected via the connecting member 60.

In this embodiment, the upper end of the curved portion 61 is configured to be located vertically above the axis of the transmission shaft 55 (or the axis of the connecting member 56), and the left and right side surfaces of the curved portion 61 are in surface contact with the inner side surface of the groove portion 562 of the connecting member 56. This makes it possible to make the movement of the connecting member 56 in response to the operation of the switching interlocking mechanism 59 smoother than when the switching conversion portion 592 of the switching interlocking mechanism 59 is directly connected to the connecting member 56 without using the connecting member 60. The vertical distance X may be set appropriately according to the product specifications, etc., but the above effect can be achieved as long as the upper end of the curved portion 61 is located at least above the axis of the connecting member 56.

(First receiving member 57a)
As shown in Fig. 8, the first receiving member 57a is located on the left side of the connecting member 56 in the left-right direction in the figure, and is formed in a substantially ring shape with the transmission shaft 55 inserted therethrough so as to be rotatable relative to the first receiving member 57a. On the left side of the first receiving member 57a, a substantially disk-shaped protruding piece 511 is located which is integrally formed with the first output shaft 51a and protrudes radially outward, and a coil spring 572 is provided between the protruding piece 511 and the first receiving member 57a. The protruding piece 511 is provided with a plurality of protrusions which protrude toward the first receiving member 57a, and the first receiving member 57a is formed with a plurality of holes into which the protrusions are slidably fitted. As a result, the first receiving member 57a is connected to the first output shaft 51a via the protruding piece 511 so as to be rotatable together with the first output shaft 51a and so as to be movable in the left-right direction.

11, a plurality of engagement teeth 571 having substantially the same shape as the engagement teeth 561 of the opposing connecting member 56 are provided on the right side of the first receiving member 57a. The inclined surfaces of the engagement teeth 571 are in the opposite circumferential position to the inclined surfaces of the engagement teeth 561. Therefore, when the connecting member 56 moves to the first position and rotates in one direction, the engagement teeth 561 and the engagement teeth 571 engage with each other, and the connecting member 56 and the first receiving member 57a are connected to each other and rotate together. On the other hand, because the rotation input from the pulley 52 to the transmission shaft 55 is in one direction only, the rotation transmitted from the connecting member 56 to the first receiving member 57a is in one direction only. However, when the connecting member 56 rotates in the other direction, the inclined surface of the engagement tooth 561 and the inclined surface of the engagement tooth 571 slide against each other, causing the first receiving member 57a to move toward the protruding piece 511 against the biasing force of the coil spring 572, and the connecting member 56 is shaped to be rotatable relative to the first receiving member 57a. In other words, the connecting member 56 and the first receiving member 57a form a so-called ratchet mechanism.

The coil spring 572 also functions as a buffer that moves the first receiving member 57a to the left to cushion the impact if the engagement teeth 561, 571 collide when the first receiving member 57a and the connecting member 56 are connected. Even if such a collision occurs, the engagement teeth 561, 571 slide along their inclined surfaces, allowing the connecting member 56 to move to an appropriate position (first position). Note that the present invention is not limited to the coil spring 572, and any elastic body such as a leaf spring can achieve the same effect as described above.

(Second receiving member 57b)
As shown in FIG. 8, the second receiving member 57b is located on the right side of the connecting member 56 in the left-right direction in the figure, and is formed in a substantially ring shape with the transmission shaft 55 inserted therethrough so as to be relatively rotatable. In this embodiment, the second receiving member 57b is the same member as the first receiving member 57a, and is disposed so that the engagement teeth 571 face each other and the connecting member 56 is located therebetween. Between the transmission shaft 55 and the second receiving member 57b, a hollow, substantially cylindrical relay member 573 through which the transmission shaft 55 is inserted so as to be relatively rotatable is rotatably supported in the housing 50b. On the right side of the second receiving member 57b, a substantially disk-shaped protruding piece 574 is formed integrally with the relay member 573 and protrudes in the radially outward direction, and a coil spring 572 is provided between the protruding piece 574 and the second receiving member 57b. The protruding piece 574 is provided with a plurality of protrusions that protrude in the direction of the second receiving member 57b, and the second receiving member 57b is formed with a plurality of holes into which the protrusions are slidably fitted. As a result, the second receiving member 57b is connected to the relay member 573 via the protruding piece 574 so as to be rotatable together with the relay member 573 and so as to be movable in the left-right direction.

As shown in FIG. 11, the engagement teeth 571 of the second receiving member 57b are formed on the left side opposite to the first receiving member 57a. Therefore, when the connecting member 56 moves to the second position and rotates in one direction, the second receiving member 57b is connected to the connecting member 56 by engaging the engagement teeth 561 and 571, similar to the first receiving member 57a, and rotates together with the connecting member 56. The function realized by the second receiving member 57b and the coil spring 572 is the same as that of the first receiving member 57a, so a description thereof will be omitted here.

(Input gear 58a, output gear 58b, and intermediate gear 58c)
As shown in Fig. 8 and Fig. 9, the input gear 58a is disk-shaped and is integrally provided on the right end of the relay member 573 in the figure. As shown in Fig. 7 and Fig. 9, the output gear 58b is disk-shaped and is integrally provided on the right end of the second output shaft 51b in the figure. As shown in Fig. 9, the intermediate gear 58c is located between the input gear 58a and the output gear 58b, and is integrally provided on a support shaft (not shown) whose one end is rotatably supported on the housing part 50b and whose other end is rotatably supported on the housing part 50c, and meshes with each gear. When a rotational driving force is input to the input gear 58a, the output gear 58b can output a rotational driving force in the same direction via the intermediate gear 58c.

In this embodiment, the connecting member 56, the first and second receiving members 57a, 57b, the input gear 58a, the output gear 58b, and the intermediate gear 58c constitute a connecting section that selectively connects either the first or second drive shaft 201a, 201b to the transmission shaft 55.

(Switching interlocking mechanism 59)
As shown in Figure 3, the switching interlocking mechanism 59 includes a switching transmission part 591 having one end rotatably connected to the switching operation part 532, and a switching conversion part 592 having a roughly central part rotatably supported within the housing part 50b, one end rotatably connected to the other end of the switching transmission part 591, and the other end rotatably connected to the connecting member 60.

As shown in Figs. 7 and 11, the switching transmission unit 591 is formed in a generally plate-like shape extending in the left-right direction below the second output shaft 51b, and is supported by the housing unit 50b so as to be movable in the left-right direction as shown in Fig. 9. As shown in Fig. 11, a connecting hole 591a is provided at one end (right end in the figure) of the switching transmission unit 591, and a connecting hole 591b is provided at the other end (left end in the figure). The switching operation unit 532 and the switching transmission unit 591 are rotatably connected by inserting the connecting pin 532a of the switching operation unit 532 into the connecting hole 591a. On the other hand, the switching transmission unit 591 and the switching conversion unit 592 are rotatably connected by inserting the cylindrical connecting pin 592b extending in the up-down direction formed at the other end of the switching conversion unit 592 into the connecting hole 591b.

The connecting holes 591a and 591b are formed as long holes that are long in the front-rear direction, which allows the connecting pins 532a and 592b to slide in the front-rear direction while rotating in the connecting holes 591a and 591b. Therefore, the switching transmission part 591 can perform approximately reciprocating linear motion without transmitting the front-rear movement caused by the arc-shaped swing of the connecting pin 532a caused by the rotation of the switching operation part 532. Furthermore, since the connecting pin 592b swings in an arc in response to this reciprocating linear motion, the switching conversion part 592 rotates. In other words, the rotational motion of the switching operation part 532 is converted into linear motion by the switching transmission part 591, and the linear motion is further converted into rotational motion by the switching conversion part 592, and is transmitted as a motion that moves the connecting member 56 in the left-right direction.

As shown in Figs. 7 and 11, a steel ball 593 is disposed above the switching transmission part 591, and the upper surface of the switching transmission part 591 is provided with two adjacent first and second recesses 591c and 591d that are deep enough to accommodate a portion of the steel ball 593. As shown in Fig. 7, the movement of the steel ball 593 is restricted in any direction other than the up and down direction by the housing part 50b, and when the steel ball 593 is positioned in either the first or second recess 591c, 591d, a leaf spring 594 provided on the housing part 50b abuts against the upper part of the steel ball 593.

When the switching transmission part 591 moves left and right, the steel ball 593 is restricted from moving left and right, so that it moves over the edge between the recesses and from one recess to the other in response to the movement of the first and second recesses 591c, 591d. When it moves over the edge between the recesses, it moves upward against the biasing force of the leaf spring 594, and then moves downward in response to that biasing force. Therefore, when the switching operation part 532 is rotated, it is rotated against the biasing force of the leaf spring 594. This makes it possible to restrict unnecessary left and right movement of the switching transmission part 591, and also to provide an appropriate sense of resistance and clicking sensation to the operator who rotates the switching operation part 532 via the grip part 534. In this embodiment, when the steel ball 593 is in the first recess 591c as shown in FIG. 12, the connecting member 56 is in the first position, and when the steel ball 593 is in the second recess 591d as shown in FIG. 11, the connecting member 56 is in the second position.

3 and 10, the switching conversion unit 592 is formed in a substantially plate-like shape extending in the front-rear direction so as to straddle the second output shaft 51b, with one end located below the connecting member 56 and the other end located below the second output shaft 51b. The switching conversion unit 592 has an insertion hole 592c at its approximate center through which the support shaft 502 provided in the housing unit 50b can be inserted, and is supported in the housing unit 50b so as to be rotatable around the support shaft 502. The above-mentioned connecting pin 592a is provided at one end (left end in FIG. 10) of the switching conversion unit 592, and the above-mentioned connecting pin 592b is provided at the other end (right end in FIG. 10). The switching conversion unit 592 rotates in response to the reciprocating linear motion of the switching transmission unit 591, so that the connecting pin 592a rotates and swings in an arc in the connecting hole 62 of the connecting member 60. In response to this swing, the connecting member 56 moves left and right together with the connecting member 60.

When the connecting pin 592a of the switching conversion unit 592 swings in an arc, it moves slightly forward and backward in addition to the left and right movement. To prevent this forward and backward movement from being transmitted to the connecting member 60, the connecting hole 62 is formed as an oblong hole that is long in the forward and backward directions, similar to the connecting holes 591a and 591b.

(Operation of Operation Unit 5)
The operation of the operation unit 5 configured as above in the first and second drive states will be described in detail with reference to Figs. 11 to 14. Figs. 13 and 14 are bottom views for explaining the transmission of drive force in the operation unit in the second drive state and the first drive state, respectively. Note that in Figs. 13 and 14, components to which drive force is transmitted are indicated by thicker lines than other components.

As shown in Fig. 11, the steel ball 593 is positioned in the second recess 591d, and the connecting member 56 and the second receiving member 57b are connected, so that the operation unit 5 is in the second drive state. In the second drive state, as shown in Fig. 13, the rotational drive force of the pulley 52 is transmitted to the second output shaft 51b. Specifically, the rotational drive force of the pulley 52 is transmitted to the transmission shaft 55 via the clutch mechanism 54 (interlocking member 541), and the connecting member 56 connected to the transmission shaft 55 rotates in the same direction as the pulley 52. At this time, since the connecting member 56 is switched to the second position in the second drive state, it is connected to the second receiving member 57b so as to be rotatable together with it, and the second receiving member 57b rotates in the same direction as the connecting member 56. In response to the rotation of the second receiving member 57b, a rotational driving force is input to the input gear 58a, and is transmitted to the output gear 58b via the input gear 58a and intermediate gear 58c, and is output to the second output shaft 51b that is connected to the output gear 58b so that it can rotate together with it. This allows the second output shaft 51b to rotate in the same direction as the rotation of the pulley 52.

On the other hand, when the switching operation part 532 of the operation unit 5 in the second drive state is rotated clockwise in a plan view, the switching transmission part 591 moves to the right in the figure, as shown in FIG. 12. In conjunction with this movement, the switching conversion part 592 rotates counterclockwise in a plan view, causing the connecting member 56 to move to the left in the figure and switch from the second position to the first position, and to connect with the first receiving member 57a. Therefore, the left-right position of the connecting member 56 can be easily switched by rotating the switching operation part 532. At this time, the steel ball 593 moves from the second recess 591d to the first recess 591c in response to the movement of the switching transmission part 591 to the right in the figure.

14, the operation unit 5 is in the first drive state by connecting the connecting member 56 and the first receiving member 57a. In the first drive state, the rotational drive force of the pulley 52 is output to the first output shaft 51a. Specifically, the rotational drive force of the pulley 52 is transmitted to the connecting member 56 via the clutch mechanism 54 (interlocking member 541) and the transmission shaft 55. At this time, since the connecting member 56 is switched to the first position in the first drive state, it is connected to the first receiving member 57a so as to be rotatable together with the first receiving member 57a, and the first receiving member 57a rotates in the same direction as the connecting member 56. Since the first receiving member 57a is connected to the first output shaft 51a so as to be rotatable together with the first output shaft 51a, the rotational drive force is output to the first output shaft 51a via the first receiving member 57a. As a result, the first output shaft 51a can rotate in the same direction in conjunction with the rotation of the pulley 52.

When the operation unit 5 is to be shifted from such a first drive state back to the second drive state, the switching operation part 532 of the operation unit 5 is rotated counterclockwise in a plan view. Note that the operation of the operation unit 5 in this case is not described here because it is only the case that the movement directions of the connecting member 56 and the switching interlocking mechanism 59 are reversed.

(Operation of shading device 1)
Next, the operation of the shading device 1 when the operation unit 5 is operated in the first and second drive states will be described in detail with reference to Figs. 15 to 17. Fig. 15 is a front view of the shading device according to this embodiment in which the bottom rail is in the lowest position and the intermediate bar is in the intermediate position. Figs. 16 and 17 are front views of the shading device in the first drive state and the second drive state, respectively, in which the operation cord of the operation unit is pulled.

When the bottom rail 31 and intermediate bar 41 shown in FIG. 15 are in the lowest position and the operation unit 5 is in the first drive state, pulling down the cord stopper 535 to rotate the pulley 52 transmits the rotational drive force of the pulley 52 to the first output shaft 51a as described above. The rotational drive force transmitted to the first output shaft 51a is output to the first drive shaft 201a and transmitted to the first winding drum 202a, which rotates to wind up the lifting cord 32. This allows the bottom rail 31 to be raised as shown in FIG. 16.

When the operator stops pulling down the cord stopper 535, the first drive shaft 201a, to which the rotational drive force was being transmitted, attempts to rotate downward due to the weight of the bottom rail 31, but the first stopper device 203a (see Figure 1) is activated and stops the rotation. When the operator releases the cord stopper 535 while it is still pulled, the biasing force of the power spring 521 causes the pulley 52 to rotate in the reverse direction, and the operating cord 531 is wound up. At this time, the pulley 52 rotates relative to the interlocking member 541, so only the pulley 52 rotates in the reverse direction. Therefore, the reverse rotation is not transmitted to the first drive shaft 201a, and the position of the raised bottom rail 31 does not change.

As a result, the first drive shaft 201a is stopped by the first stopper device 203a, and the operating cord 531 is wound around the pulley 52 until the cord stopper 535 abuts against the lower end of the gripping portion 534. The operator can raise the bottom rail 31 together with the screen 33 to the highest position by repeatedly pulling down the cord stopper 535 in this manner. To lower the raised bottom rail 31, the operator pulls the cord stopper 535 and releases it when the operating cord 531 has been pulled out slightly, which releases the first stopper device 203a via the first drive shaft 201a, and the bottom rail 31 descends under its own weight. At this time, the bottom rail 31 descends under its own weight while being decelerated by the action of the first brake device 204a, which slows down the rotation of the first drive shaft 201a.

15, when the grip 534 is rotated counterclockwise in plan view as shown in FIG. 17, the switch operation part 532 rotates integrally, and the linking member 56 is moved from the first position to the second position in conjunction with the operation of the switch interlocking mechanism 59 in response to the rotation. This places the operation unit 5 in the second drive state. When the operation unit 5 is in the second drive state, if the cord stopper 535 is pulled down to unwind the operation cord 531 from the pulley 52, the rotational drive force of the pulley 52 is transmitted to the second output shaft 51b as described above. The rotational drive force transmitted to the second output shaft 51b is output to the second winding drum 202b via the second drive shaft 201b, and the second winding drum 202b winds up the dimmer cord 42. This allows the intermediate bar 41 to be raised as shown in FIG. 17.

When the operation unit 5 is in the second drive state, the operation of the shading device 1 when the pulling operation of the cord stopper 535 is stopped or when the operator releases the cord 531 with a small amount of pull out is the same as when the operation unit 5 is in the first drive state, except that the main operating body is the intermediate bar 41 and the second drive system. Therefore, a description is omitted.

According to the present embodiment described above, the rotational driving force of the pulley 52 can be selectively transmitted to either the first or second drive shaft 201a, 201b by only rotating the switching operation unit 532. Therefore, the first and second drive shafts 201a, 201b can be driven individually by only one operation unit 53, and compared to a technique in which each drive shaft is driven by two pulleys and two operation cords, there is no interference between the two operation cords, and operability can be improved to each level. In addition, by using the connecting member 56 and the switching interlocking mechanism 59, switching to either the first or second drive shaft 201a, 201b to transmit the rotational driving force can be achieved by only rotating the switching operation unit 532, which is extremely simple. Furthermore, the switching conversion part 592 of the switching interlocking mechanism 59 is connected to the connecting member 56 and the connecting member 60 below the second output shaft 51b, whose axis is concentric with the second drive shaft 201b, so that it straddles the second output shaft 51b, making effective use of the space within the operation unit 5 and achieving a compact overall unit.

In this embodiment, the first moving member moved by the rotation of the first drive shaft 201a and the second moving member moved by the rotation of the second drive shaft 201b are the bottom rail 31 and the intermediate bar 41, which are respectively moved in the vertical direction. However, the movement direction of the first moving member and the second moving member may be in any direction, and the first moving member and the second moving member may be arranged in front and rear and move up and down or left and right, respectively. In addition, the rotational driving force of the pulley 52 is selectively transmitted to either the first or second drive shaft 201a, 201b by the rotation operation of the switching operation unit 532, but this is not limited to this. The switching operation unit 532 may be slid up and down or left and right. In addition, the clutch mechanism 54 transmits only the rotational driving force in one direction of the pulley 52 to the transmission shaft 55, but this is not limited to this. The present invention is also applicable to a shielding device in which the pulley is rotated in one direction and the other direction by a ring-shaped ball chain or the like, and each drive shaft is rotated in both directions by the bidirectional rotational driving force. In that case, for example, by making the engagement teeth 561, 571 rectangular rather than inclined, it is possible to selectively transmit rotation in both directions to the first and second output shafts 51a, 51b. Also, while a pleated screen has been used as an example of a shading device, the present invention can be applied to shading devices such as blinds, curtains, or partitions, including horizontal blinds, vertical blinds, roll screens, honeycomb screens, tuck-up curtains, and accordion doors.

The present invention can be implemented in various other forms without departing from the spirit or main characteristics thereof. Therefore, the above-described embodiments are merely illustrative in all respects and should not be interpreted as limiting. The scope of the present invention is defined by the claims and is not limited in any way by the text of the specification. Furthermore, all modifications, improvements, substitutions and alterations within the scope of the claims are within the scope of the present invention.

1 Shielding device 201a First drive shaft 201b Second drive shaft 31 Bottom rail (first moving member)
41 Intermediate bar (second moving member)
5 Operation unit (operation device)
52 Pulley 53 Operation unit 531 Operation cord 532 Switching operation unit 533 Operation rod 535 Cord stopper 56 Connection member (transmission unit)
59 Switching interlocking mechanism (transmission part)
591 Switching transmission unit (transmission unit)
592 Switching conversion unit (transmission unit)

Claims (5)

An operating device for operating the first and second moving members of the shading device,
an operation unit capable of switching the shading device between a first state for operating the first moving member and a second state for operating the second moving member,
The operation unit has an operation rod,
The switching operation is performed by rotating the operating rod ,
The operation unit has a switching operation unit having one end connected to the shading device and the other end connected to the operation rod so as to be rotatable together with the operation rod,
When the operating rod is rotated, the rotation is input to the shading device via the switching operation unit, and the switching operation is performed.
An operating device characterized by: a transmission unit that transmits the rotation of a pulley that rotates by pulling an operating cord to a first drive shaft that drives the first moving member when the shielding device is moved to a first position, and transmits the rotation of the pulley to a second drive shaft that drives the second moving member when the shielding device is moved to a second position, and sets the shielding device to a second state;
The operating device according to claim 1 , wherein, when the operating rod is rotated, the position of the transmission part is switched to either the first or second position by the switching operation part to which the rotation is input. The operating portion has a cord stopper located at a lower end of the operating rod and connected to one end of an operating cord passing through the operating rod,
3. The operating device according to claim 1, wherein, when the cord fastener is pulled, the first moving member moves in the first state, and the second moving member moves in the second state. An operating device for operating the first and second moving members of the shading device,
an operation unit capable of switching the shading device between a first state for operating the first moving member and a second state for operating the second moving member,
The operation unit includes an operation rod and a cord stopper located at a lower end of the operation rod and connected to one end of an operation cord passing through the operation rod ,
The switching operation is performed by rotating the operating rod ,
When the cord fastener is pulled, the first moving member moves in the first state, and the second moving member moves in the second state.
An operating device characterized by: An operating device for operating the first and second moving members of the shading device,
an operation unit capable of switching the shading device between a first state for operating the first moving member and a second state for operating the second moving member,
The operation unit has an operation rod,
The operating device, characterized in that the switching operation is performed by sliding the operating rod in a vertical or horizontal direction.