WO2020095724A1

WO2020095724A1 - Shielding device

Info

Publication number: WO2020095724A1
Application number: PCT/JP2019/041967
Authority: WO
Inventors: 俊勝亦
Original assignee: 株式会社ニチベイ
Priority date: 2018-11-07
Filing date: 2019-10-25
Publication date: 2020-05-14
Also published as: JP7199923B2; JP2020076244A

Abstract

The present invention comprises: a drive shaft 40c that drives a shielding member so as to rotate in one direction, thereby performing a first operation, and drives the shielding member so as to rotate in a reverse direction that is the reverse of the one direction, thereby performing a second operation differing from the first operation; a first pulley 43a with which it is possible to rotate the drive shaft 40c in only the one direction; a second pulley 43b with which it is possible to rotate the drive shaft 40c in only the reverse direction; a first operation cord 42a for rotating the first pulley 43a; and a second operation cord 42b for rotating the second pulley 43b.

Description

Shielding device

The present embodiment relates to a shielding device having a shielding material such as slats.

Conventionally, as this type of shielding device, the solar radiation shielding device shown in Patent Document 1 below is known. In this solar shading device, the pulley shaft is connected to the rotary shaft of the drum to which the lifting cord is attached, the pulley shaft is borne by the bearing block provided in the head box, and the pulley shaft and the cylinder protruding from the cylindrical portion of the bearing block are coupled to each other. The sleeve is rotatably fitted to the outer part, a coil spring brake is provided between the sleeve and the cylindrical part, and the second operation cord pulley is fitted to the one side of the sleeve via the one-way clutch, and the other side of the sleeve is attached. A first operation cord pulley via another one-way clutch, and a coil spring clutch for connecting and disconnecting the sleeve and the pulley shaft to the other one-way clutch in a controllable manner. Is provided with a rewinding spring for returning the rotation of the first operation code and a return spring for returning the rotation of the first operation code pulley.

According to this solar shading device, when the raising operation cord wound around the second operation cord pulley is pulled, the solar radiation shield (shielding member) rises, and when released, the solar radiation shield body stops at the raised position and the raising operation cord changes. When returning to the original and pulling the descending operation cord wound around the first operation cord pulley, the solar shading body descends by its own weight, and when released, it stops at the lowered position and the descending operation code returns to the original position. Can be operated. Therefore, since the two raising and lowering operation cords hanging from the head box for raising and lowering the shielding member can be made into one cord that does not form a loop, the cords hang around the infant's neck. Safety is maintained without accidents.

JP, 2006-200153, A

However, the above-described shielding device lowers the shielding material by continuously pulling the lowering operation code by a certain amount, but this cannot directly transmit the rotation in the direction of lowering the shielding material to the rotating shaft. By allowing the pulley shaft to rotate freely, rotation of the rotating shaft in the descending direction is allowed.Since the descending depends on the weight of the shielding material, the shielding material is not dependent only on the weight of the shielding material. It was desired to move it.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a shielding device that can move the shielding material while maintaining safety and without depending on only the weight of the shielding material. And

In order to solve the above-mentioned problems, according to one embodiment of the present invention, by rotating in one direction, a shielding material is driven to perform a first operation, and by rotating in a reverse direction opposite to the one direction, A drive shaft that drives the shielding member to perform a second motion different from the first motion, a first pulley that can rotate the drive shaft only in the one direction, and a drive shaft in the opposite direction. A second pulley that can be rotated only, a first operating member that rotates the first pulley, and a second operating member that rotates the second pulley.

According to the present invention, it is possible to provide a shielding device that can move the shielding material while maintaining safety and without depending on only the weight of the shielding material. Other effects of the present invention will be described in the section of the following modes for carrying out the invention.

It is a front view which shows the structure of the shielding apparatus which concerns on 1st Embodiment. It is a fragmentary sectional view showing composition of an operating device concerning a 1st embodiment. 3 is a cross-sectional view taken along the line AA shown in FIG. 2, where (a) shows a non-operation state, (b) shows an operation state of a first operation code, and (c) shows an operation state of a second operation code. FIG. 3 is a sectional view taken along line BB shown in FIG. 2, where (a) shows a non-operation state, (b) shows an operation state of a first operation code, and (c) shows an operation state of a second operation code. FIG. 3 is a cross-sectional view taken along line CC of FIG. 2, where (a) shows a non-operation state, (b) shows an operation state of a first operation code, and (c) shows an operation state of a second operation code. FIG. 3 is a cross-sectional view taken along line DD shown in FIG. 2, where (a) shows a non-operation state, (b) shows an operation state of a first operation code, and (c) shows an operation state of a second operation code. FIG. 3 is a sectional view taken along line EE shown in FIG. 2, where (a) shows a non-operation state, (b) shows an operation state of a first operation code, and (c) shows an operation state of a second operation code. FIG. 3 is a sectional view taken along line FF shown in FIG. 2, where (a) shows a non-operation state, (b) shows an operation state of a first operation code, and (c) shows an operation state of a second operation code. It is a longitudinal cross-sectional view showing a configuration of a self-weight lowering prevention unit. FIG. 10 is a cross-sectional view taken along line GG shown in FIG. 9, where (a) shows a state in which rotation from the rotation shaft is applied in one direction, and (b) shows a state in which rotation from the drive shaft is added in one direction. Show. It is a front view of a shielding device for explaining full closure of a slat. It is a front view of the shielding device for demonstrating anti-fully closed slat. It is a front view of a shielding device for explaining rise of a slat. It is a front view which shows the shielding device in which a slat is in the most raised position. It is a front view of the shielding device for demonstrating descent of a slat. It is a front view which shows the structure of the shielding device which concerns on another form. It is a schematic front view for demonstrating the component arrangement of the operating device which concerns on 1st Embodiment. It is a schematic front view for demonstrating the component arrangement of the operating device which concerns on 2nd Embodiment. It is a schematic front view which shows the structure of the operating device which concerns on 3rd Embodiment. The internal structure of the operating device which concerns on 3rd Embodiment is shown, (a) is an exploded perspective view, (b) shows a perspective view. It is a schematic front view which shows the structure of the operating device which concerns on 4th Embodiment.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In the first to fourth embodiments described below, the surface on the indoor side when the shielding device is provided is the front surface, the surface on the outdoor side is the back surface, and the direction orthogonal to the front surface and the back surface is the front-rear direction. The longitudinal direction of the shielding device will be referred to as the left-right direction and will be described below. In addition, in the present specification and the drawings, components having substantially the same function are designated by the same reference numeral, and a duplicate description will be omitted.

<First Embodiment>
Hereinafter, the shielding device according to the first embodiment will be described. In the present embodiment, a case will be described as an example where the present invention is applied to a horizontal blind in which a slat as a shielding material moves up and down.

(overall structure)
First, the overall configuration of the shielding device according to this embodiment will be described. FIG. 1 is a front view showing the configuration of the shielding device according to the present embodiment. In addition, in this figure, the bottom rail is lowered to the lowest position and the slats are positioned horizontally, and the inside of the head box is shown.

As shown in FIG. 1, the shielding device 1 according to the present embodiment includes a head box 2, a bottom rail 31, an elevating cord 32, a plurality of slats 33, a ladder cord 34, an operating device 4, and a self-weight lowering. And a prevention unit 5.

The head box 2 is fixed to a window frame or the like via a bracket (not shown), and is formed in a long box shape having an accommodation space inside. In the head box 2, a rotary shaft 201, three winding drums 202, an operating device 4, and a dead weight drop prevention unit 5 are provided.

The rotating shaft 201 is a prismatic member that extends in the left-right direction, and is rotatably supported in the head box 2 with the axis centering in the left-right direction. In the present embodiment, the rotating shaft 201 is connected to the operating device 4 via the own weight drop prevention unit 5 and rotates according to the operation of the operating device 4.

Each of the three winding drums 202 is penetrated by the rotation shaft 201 so as to rotate integrally with the rotation shaft 201, and one end of one elevating cord 32 is connected so as to be able to wind and unwind. Therefore, each of the three take-up drums 202 can integrally wind in response to the rotation of the rotary shaft 201 to wind or wind the lifting cord 32. The rotation in the same direction as the rotating shaft 201 that winds the lifting cord 32 will be referred to as the rising direction, and the rotation in the same direction as the unwinding rotating shaft 201 will be referred to as the descending direction.

The bottom rail 31 is connected to the other ends of the three elevating cords 32, is suspended from the head box 2 so as to be located at the lowermost end of the shielding device 1, and is formed long in the left-right direction. The three lifting cords 32 are each formed in a string shape, one end of which is connected to the winding drum 202 and the other end of which is connected to the bottom rail 31 and is wound or unwound on the winding drum 202. The bottom rail 31 is moved up and down.

A plurality of slats 33 are vertically arranged between the head box 2 and the bottom rail 31 as a shielding material that is hung from the head box 2, and three lifting cords 32 are inserted to raise and lower the bottom rail 31. Move with it. The ladder cord 34 is arranged in the front-rear direction of each of the plurality of slats 33 and individually supports the slats 33. The ladder cord 34 is connected to a drum device (not shown) and fully closes the slats 33 according to the rotation of the rotating shaft 201. Rotate it to the fully open state.

The operation device 4 is provided in one of the left and right ends in FIG. 1 in the head box 2, in the present embodiment, the right end, and rotates the rotary shaft 201 via the own weight drop prevention unit 5 to rotate the bottom rail. 31 and the slats 33 are moved up and down (first motion and second motion) and the slats 33 are tilted.

The self-weight lowering prevention unit 5 prevents rotation of the rotating shaft 201 (that is, rotation in the descending direction of descending the slat 33) which is constantly applied by the self-weight of the bottom rail 31 via the elevating cord 32 and the winding drum 202. Therefore, it is possible to prevent the bottom rail 31 from being lowered due to its own weight.

(Configuration of operating device 4)
Next, the configuration of the operating device 4 will be described in detail with reference to FIGS. FIG. 2 is a partial cross-sectional view showing the configuration of the operating device according to this embodiment, and FIGS. 3 to 8 are cross-sectional views taken along the line AA to FF shown in FIG. In each of FIGS. 3 to 8, (a) shows a non-operation state of various operation codes, (b) shows an operation state of the first operation code, and (c) shows an operation state of the second operation code. The operation state here means a state in which a first or second operation code described later is being operated, and the non-operation state means a state in which the first or second operation code is not being operated. ..

As shown in FIG. 2, the operating device 4 includes a first operating unit 40a and a second operating unit 40b, and a drive shaft 40c penetrating these two operating units in the left-right direction.

The first operation unit 40a includes a main body case 41, a first operation cord 42a, and a drive mechanism including a first pulley 43a, which will be described later, and the drive shaft 40c is inserted substantially at the center of the side. This is rotated only in one direction, in the present embodiment only in the ascending direction. By this rotation, the rotary shaft 201 is rotated in the same direction via the own weight drop prevention unit 5, and the bottom rail 31 and the slats 33 are raised according to the operation amount thereof.

On the other hand, the second operation unit 40b is arranged in parallel with the first operation unit 40a in the left-right direction, and has a main body case 41 having the same configuration as the first operation unit 40a, a second operation cord 42b, a second pulley 43b described later, and the like. And a drive mechanism including. Further, the second operation unit 40b has the drive shaft 40c inserted through the lateral center thereof, and rotates the drive shaft 40c in a direction opposite to the first operation unit 40a, that is, in the descending direction, and rotates through the own weight drop prevention unit 5. The shaft 201 is rotated in the same direction and the bottom rail 31 and the slat 33 are lowered according to the operation amount.

The first operation cord 42a is formed in a tape shape, and one end of the cord member 421 is connected to the first pulley 43a so as to be able to be wound and unwound, and a first grip portion provided at the other end of the cord member 421. 422a and a stopper 423 fixedly provided at a predetermined position between one end and the other end of the cord member 421.

On the other hand, the second operation cord 42b is formed in a tape shape like the first operation cord 42a, and one end of the second operation cord 42b is connected to the second pulley 43b so that the second operation cord 42b can be wound and unwound in the opposite direction to the first operation cord 42a. The cord member 421 has a second grip portion 422b provided at the other end of the cord member 421, and a stopper 423 fixedly provided at a predetermined position between one end and the other end of the cord member 421.

The first grip portion 422a is operated by the operator of the shielding device 1 when the operator operates the first operation cord 42a, specifically, when the cord member 421 is pulled downward so as to be unwound from the first pulley 43a. It is a member provided for gripping. In the present embodiment, the first grip portion 422a is formed in a substantially triangular shape in which the width in the left-right direction gradually narrows upward, and therefore, the first grip portion 422a has the appearance of an arrow indicating upward. The operator can intuitively understand that the included first operation code 42a is for raising the bottom rail 31.

On the other hand, the second grip portion 422b is operated when the operator of the shielding device 1 operates the second operation cord 42b, specifically, when the cord member 421 is pulled downward so as to be unwound from the second pulley 43b. It is a member provided for a person to hold. In the present embodiment, the second grip portion 422b is formed in a substantially triangular shape in which the width in the left-right direction gradually narrows downward, and therefore, the second grip portion 422b has the appearance of an arrow pointing downward. The operator can intuitively understand that the included second operation code 42b is for lowering the bottom rail 31.

A stopper 423 provided on each of the first and

second operation cords

42a and 42b regulates that the cord member 421 is wound by a respective pulley (first pulley 43a or second pulley 43b) beyond a predetermined amount. The structure of the cord member 421 and the stopper 423 may be a structure in which two different cords are connected in the stopper 423, or a structure in which the stopper 423 is fixed in the middle of one cord. Good.

The main body case 41 included in each of the first and

second operation units

40a and 40b has a front side portion exposed from the head box 2 for leading out the first or

second operation cords

42a and 42b, and is internally described above. 2 and 4, a housing space 411 that can house the stopper 423 is formed at the lower end on the front side at the substantially center in the left-right direction, as shown in FIGS. The stopper 423 is housed in a state where the cord member 421 is wound around the pulley, in other words, in a non-operated state.

In addition, as shown in FIGS. 2, 4, and 7, in order to lead out the stopper 423 accommodated in the accommodation space 411, the outside and the accommodation space 411 are individually communicated with each other in the main body case 41. The opening 412 is formed. The opening 412 is continuously formed on the front surface and the lower surface so that the front surface and the lower surface of the accommodation space 411 are open. Therefore, the stopper 423 is introduced into the accommodation space 411 with the front surface and the lower surface exposed. It is housed so that it can be extracted.

The accommodation space 411 is provided with an insertion hole 413 through which the cord member 421 can be inserted and the stopper 423 cannot be inserted in the ceiling wall, and the cord member 421 can be taken in and out of the main body case 41 through the insertion hole 413. I have to. Therefore, even when the cord member 421 is completely wound around each pulley in the non-operating state, the stopper 423 is prevented from entering the main body case 41 by contacting the stopper 423 with the ceiling wall thereof. There is. Thus, the winding of the cord member 421 around the pulley by a predetermined amount or more is regulated, and further, the introduction of the cord member 421 by a predetermined amount or more into the main body case 41 is regulated.

(Structure of drive mechanism)
Next, the drive mechanism in the first operation unit 40a and the second operation unit 40b described above will be described in detail. The first operating unit 40a includes a first pulley 43a, a first urging member 44a, and a first clutch mechanism 45a as a drive mechanism, and the second operating unit 40b includes a second pulley 43b and a second urging mechanism as a drive mechanism. The member 44b and the second clutch mechanism 45b are provided.

As shown in FIG. 2, each of the first and

second pulleys

43a and 43b is rotatable relative to a support shaft 46 fitted in a cylindrical fixed shaft 414 integrally provided in the main body case 41. Are rotatably supported, and are respectively coupled to the drive shaft 40c through the first or second

clutch mechanisms

45a and 45b so that only rotations in different directions can be transmitted.

Each of the support shafts 46 of the first and

second operation units

40a, 40b has a substantially tubular shape with one end having a smaller diameter than the other end, as shown in FIGS. 2, 5, and 8. One end is fixedly fitted into the fixed shaft 414, and the other end is fitted into a hollow portion of the clutch drum 452 described later to support it relatively non-rotatably, and the drive shaft 40c is inserted into the hollow portion. There is. Similarly, since the drive shaft 40c is also inserted through the hollow portion of the fixed shaft 414, in the present embodiment, the rotation shaft centers of the first and

second pulleys

43a and 43b are the fixed shaft 414 and the support shaft, respectively. 46 and the shaft center of the drive shaft 40c.

As shown in FIG. 2, in the first pulley 43a, one end of a cord member 421 is connected, and the cord member 421 is wound around the peripheral wall so that the cord member 421 can be wound and unwound, and the cord member 421 hangs from the front in the front-rear direction. Is being done. Similarly, one end of the cord member 421 is connected to the second pulley 43b, and the cord member 421 is wound around the peripheral wall so that the cord member 421 can be wound and unwound so that the cord member 421 hangs from the front in the front-rear direction. ..

However, as shown in FIG. 4A, the cord member 421 is wound around the first pulley 43a in the counterclockwise direction from its mounting portion, while the second pulley 43b is shown in FIG. 7A. As shown in FIG. 5, the cord member 421 is wound clockwise from its mounting portion. Therefore, as shown in FIG. 4B, the first pulley 43a rotates in one direction in response to the pulling down of the first operation cord 42a, that is, in the first direction, whereas the second pulley 43b does not. As shown in FIG. 7C, when the second operation cord 42b is pulled down, the first pulley 43a rotates in the opposite direction, that is, it rotates in the second direction.

In the present embodiment, in each of the first and

second operation units

40a and 40b, the bearing 47, which is integrally rotatable with the drive shaft 40c, supports the support shaft 46 so as to be relatively rotatable. As a result, the first and

second pulleys

43a and 43b are supported by the support shaft 46 so as to be rotatable relative to the drive shaft 40c. Further, since the bearing 47 is provided, the support shaft 46 and the drive shaft 40c are prevented from sliding, and the bearing 47 is slid with the support shaft 46 by reducing the length in the left-right direction. The area to do is also small.

Further, on one side of the first pulley 43a, that is, on the right end in FIG. 2, a surrounding portion 431 that surrounds the first biasing member 44a and accommodates the first biasing member 44a in cooperation with the main body case 41 is provided. As shown in FIG. 5, a part of the peripheral wall is separated to form a first outer locking portion 432a that removably locks one end of the first biasing member 44a. On the other hand, a part of the fixed shaft 414 serves as a first inward locking portion 415a that removably locks the other end of the first biasing member 44a. Similarly, as shown in FIG. 8, the second pulley 43b is also provided with a surrounding portion 431, and a part of its peripheral wall is separated, which detachably locks one end of the second biasing member 44b. It is a second outer locking portion 432b. Further, a part of the fixed shaft 414 serves as a second inward locking portion 415b that removably locks the other end of the second biasing member 44b.

The first inner locking portion 415a has a shape that curves in the circumferential direction as shown in FIG. 5, one end side in the circumferential direction is connected to the fixed shaft 414, and the other end of the first urging member 44a is the first. The first urging member 44a is locked by being wound around the surface of the first inner locking part 415a. Since the first inner locking portion 415a locks the other end of the first biasing member 44a in a simple form in which the other end of the first biasing member 44a is wound, the first biasing member 44a can be easily attached and detached. You can The same applies to the first outer locking portion 432a described above. On the other hand, the second inner locking portion 415b has the same shape and the same function as the first inner locking portion 415a as shown in FIG. 8, but the first inner locking portion 415a has the same function. Unlike the above, the other end side in the circumferential direction is connected to the fixed shaft 414.

The first urging member 44a is a spiral spring wound as shown in FIG. 5, and is housed in the surrounding portion 431 of the first pulley 43a. Specifically, while being wound in one direction, one end is wound around and locked by the first outer locking portion 432a of the first pulley 43a, and the other end is the first inner side of the fixed shaft 414. The side locking portion 415a is wound around and locked. As a result, the first pulley 43a is constantly urged to rotate the first operation cord 42a in the winding direction, that is, the descending direction, but the stopper 423 restricts the winding of the first operation cord 42a by a predetermined amount or more. Has been done. When the first operation cord 42a is pulled down in this state, the first pulley 43a rotates in the unwinding direction, that is, the ascending direction, as shown in FIG. 5B, and the first urging member 44a responds to the rotation. Is gradually reduced in diameter, and the rotation is restricted when the fixed shaft 414 is wound to the limit.

On the other hand, as shown in FIG. 8, the second urging member 44b is a spiral spring wound in a spiral shape in the opposite direction to the first urging member 44a, and is disposed in the surrounding portion 431 of the second pulley 43b. Be accommodated. Specifically, in the state of being wound in the reverse direction, one end is wound around and locked by the second outer locking portion 432b of the second pulley 43b, and the other end is the second inner side of the fixed shaft 414. The side locking portion 415b is wound around and locked. Thereby, the second pulley 43b is always urged to rotate the second operation cord 42b in the winding direction, that is, the ascending direction, but the stopper 423 restricts the winding of the second operation cord 42b by a predetermined amount or more. Has been done. When the second operation cord 42b is pulled down in this state, the second pulley 43b rotates in the unwinding direction, that is, the descending direction as shown in FIG. 8C, and the second urging member 44b responds to the rotation. Is gradually reduced in diameter, and the rotation is restricted when the fixed shaft 414 is wound to the limit.

With this configuration, in the present embodiment, by pulling down the first and

second operation cords

42a and 42b, the first pulley 43a and the second pulley 43b rotate in opposite directions, and When the

second operation cords

42a and 42b are released, the respective cords rotate in directions opposite to each other to be in the non-operation state.

Next, the first and second

clutch mechanisms

45a and 45b will be described. The first clutch mechanism 45a can transmit only the rotation of the first pulley 43a in the ascending direction to the drive shaft 40c and the rotation of the first pulley 43a in the descending direction, which is the opposite direction, to the first pulley 43a and the drive shaft 40c. Is linked to. Similarly, the second clutch mechanism 45b is connected to the second pulley 43b and the drive shaft 40c so that only the rotation of the second pulley 43b in the downward direction can be transmitted to the drive shaft 40c and the rotation in the upward direction cannot be transmitted. Has been done.

First, the configuration of the first clutch mechanism 45a will be described in detail. As shown in FIGS. 2 and 3, the first clutch mechanism 45a includes an interlocking member 451, a clutch drum 452, a clutch pin 453 (see FIG. 3), a guide washer 454, and a cam drive 455.

The interlocking member 451 is formed in a lid shape that can be attached so as to cover the clutch drum 452, the guide washer 454, and the like. On the inner peripheral surface of the peripheral wall of the portion of the interlocking member 451 that covers the clutch drum 452, the guide washer 454, and the like, an engagement protrusion 4511 that engages with and disengages from the clutch pin 453 and protrudes radially inward is fixed in the circumferential direction. A plurality of them are formed at intervals. Accordingly, the interlocking member 451 can integrally rotate or relatively rotate according to the rotation of the first pulley 43a. Further, the interlocking member 451 is formed with a cylindrical projection protruding in the out-of-plane direction substantially at the center of the left side surface in the left-right direction, and the drive shaft 40c is inserted into this so as to rotate integrally. Accordingly, when the interlocking member 451 rotates integrally with the first pulley 43a, the rotation is transmitted to the drive shaft 40c.

The clutch drum 452 has a hollow cylindrical shape into which a support shaft 46 is fitted, and a clutch spring is fitted to the peripheral wall thereof.

The clutch pin 453 has a cylindrical shape and is slidably sandwiched between the guide washer 454 and the cam drive 455. The clutch pin 453 advances and retreats in the radial direction with respect to the interlocking member 451. The rotation of the first pulley 43a is transmitted / not transmitted. More specifically, when the clutch pin 453 is engaged with the engagement protrusion 4511 of the interlocking member 451, the rotation of the first pulley 43a is transmitted to the interlocking member 451 and the engagement is released. In this case, the rotation transmission of the first pulley 43a is released.

The guide washer 454 has a hollow disk shape, and the support shaft 46 and the clutch drum 452 pass through the hollow portion thereof, and are supported so as to be rotatable relative to them. Further, as shown in FIGS. 2 and 3, the guide washer 454 has a pair of protrusions 4541 which guide the forward / backward movement of the clutch pin 453 on the first pulley 43a side, that is, the right and left direction surface in the circumferential direction at equal intervals. Further, three sets of protrusions 4542 for integrally rotating with the cam drive 455 are provided so as to be spaced apart from each other by a predetermined distance in the circumferential direction so as to project to the outside of the two sets.

The cam drive 455 has a substantially hollow disk shape, and the clutch drum 452 penetrates through the hollow portion thereof, and is supported so as to be relatively rotatable. Further, as shown in FIG. 4, three protrusions 433 provided on the first pulley 43a and protruding toward the interlocking member 451 and equally spaced in the circumferential direction are individually inserted into the cam drive 455, respectively. Three sets of openings 4551 that are engaged with the one pulley 43a so as to be integrally rotatable are provided at the same intervals as the protrusion 433. Further, a cylindrical portion 4552 that projects in the out-of-plane direction is formed on the surface of the cam drive 455 on the side of the interlocking member 451. The peripheral wall of the cylindrical portion 4552 has a cam surface that moves the clutch pin 453 forward and backward. As a result, three sets of protrusions 4553 spaced apart at equal intervals in the circumferential direction are provided so as to project radially outward, and a protrusion 4554 capable of contacting the protrusion 4542 is provided so as to project radially inward. The cam drive 455 can rotate relative to the guide washer 454, but when the projection 4542 and the projection 4554 contact each other, the relative rotation is restricted and the cam drive 455 rotates integrally.

The second clutch mechanism 45b includes an interlocking member 451, a clutch drum 452, a clutch pin 453, a guide washer 454, and a cam drive 455, and the components are the same as those of the first clutch mechanism 45a. However, as shown in FIG. 6, the cam surfaces of the projections 4553 are circumferentially reversed, so that the respective constituent elements are reversed, and therefore the function opposite to that of the first clutch mechanism 45a is achieved. Fulfill That is, in the second clutch mechanism 45b, the first clutch mechanism 45a is configured to be able to transmit only the rotation of the first pulley 43a in the upward direction to the drive shaft 40c, whereas the second clutch mechanism 45b is configured to transmit the second clutch mechanism 45b to the second clutch mechanism 45b. Only the rotation of the pulley 43b in the descending direction can be transmitted to the drive shaft 40c.

(Operation of the first and

second operation units

40a, 40b)
Hereinafter, operations of the first operation unit 40a and the second operation unit 40b will be described. When the first operation code 42a and the second operation code 42b are not operated, the protrusion 433 of each pulley contacts the edge of the opening 4551 of the cam drive 455 as shown in FIGS. 4 (a) and 7 (a). It is not in contact with each other, and the clutch pin 453 is not engaged with the engagement protrusion 4511 of the interlocking member 451 as shown in FIGS. 3 (a) and 6 (a).

Here, when the operator first starts pulling down the first operation cord 42a, the cord member 421 is unwound from the first pulley 43a, whereby the first pulley 43a rotates in the ascending direction. In response to this, the protrusion 433 rotates in the same direction as the first pulley 43a rotates in the upward direction, and contacts the opening 4551 as shown in FIG. 4B. Due to the contact, the first pulley 43a and the cam drive 455 start rotating integrally.

In response to this integral rotation, the protrusion 4553 and the protrusion 4554 of the cam drive 455 rotate and move in the upward direction, the cam surface of the protrusion 4553 and the clutch pin 453 come into contact with each other, and the clutch pin 453 moves in the radially outward direction. As shown in (b), it engages with the engagement protrusion 4511 of the interlocking member 451. At the time of the engagement, the protrusion 4542 of the guide washer 454 and the protrusion 4554 of the cam drive 455 are in contact with each other as shown in the figure. As a result, the rotation of the first pulley 43a is transmitted to the drive shaft 40c via the interlocking member 451, and these rotate integrally in the upward direction. The rotation shaft 201 rotates according to the rotation of the drive shaft 40c, and the winding drum 202 winds the lifting cord 32 and the bottom rail 31 moves up.

At this time, on the side of the second operation unit 40b, although the interlocking member 451 of the second clutch mechanism 45b rotates in the same direction as the drive shaft 40c rotates in the upward direction, as shown in FIG. Since the pin 453 is not in the position where the pin 453 engages with the engagement protrusion 4511 of the interlocking member 451, the rotation is not transmitted to the cam drive 455, and only the interlocking member 451 idles. Therefore, as shown in FIGS. 6B to 8B, the rotation of the drive shaft 40c is not transmitted to the second pulley 43b.

When the first operation cord 42a is pulled down for a certain distance, for example, when the first operation cord 42a is pulled down to the maximum extent and then the hand is released, the repulsive force of the first biasing member 44a causes the first pulley 43a to rotate in the descending direction. That is, the cord member 421 is wound by rotating in the direction opposite to that when pulled down. In response to this, the first pulley 43a rotates in the reverse direction, and the cam drive 455 and the projection 4553 thereof rotate in the reverse direction, so that the projection 4553 and the clutch pin 453 are separated from each other, and the clutch pin 453 is slidable in the radial direction. As a result, the clutch pin 453 and the interlocking member 451 are disengaged. Therefore, the downward rotation of the first pulley 43a is not transmitted to the drive shaft 40c.

By the above-described operation of the first clutch mechanism 45a, every time the operation of pulling down the first operation code 42a and the operation of returning after the operation are repeated, the drive shaft 40c is repeatedly rotated and non-rotated, depending on the amount of pull-down operation. Further, the bottom rail 31 and the slats 33 ascend every predetermined distance. As a result, the length of the first operation cord 42a required to raise the bottom rail 31 and the slats 33 to the highest position can be shortened.

On the other hand, when the operator starts to pull down the second operation cord 42b, the cord member 421 is unwound from the second pulley 43b, so that the second pulley 43b rotates in the descending direction. In response to this, the protrusion 433 rotates and moves in the same direction as the second pulley 43b rotates in the descending direction, and comes into contact with the opening 4551 as shown in FIG. 7C. Due to the contact, the second pulley 43b and the cam drive 455 start rotating integrally. Thereafter, the operation of the second clutch mechanism 45b including the case where the second operation code 42b is released is the same as the first clutch mechanism 45a except for the rotation direction as shown in FIG. Is omitted.

Further, like the first operation unit 40a, when the second operation unit 40b is operated, on the first operation unit 40a side, the drive shaft 40c rotates in the descending direction so that the interlocking member 451 of the first clutch mechanism 45a moves in the same direction. However, since the clutch pin 453 is not in the position where the clutch pin 453 engages with the engaging protrusion 4511 of the interlocking member 451 as shown in FIG. 3C, the rotation is not transmitted to the cam drive 455, and the interlocking member does not rotate. Only 451 becomes idle. Therefore, as shown in FIGS. 3 (c) to 5 (c), the rotation of the drive shaft 40c is not transmitted to the first pulley 43a.

(Structure of self weight drop prevention unit 5)
Next, the above described self weight drop preventing unit 5 will be described in detail with reference to FIGS. 9 and 10. FIG. 9 is a vertical sectional view showing the structure of the self-weight lowering prevention unit. 10 is a cross-sectional view taken along the line GG shown in FIG. 9, where (a) is a state in which rotation is applied in one direction from the rotation axis, and (b) is a state in which rotation is applied in one direction from the drive shaft Shows the state. Note that FIG. 9 shows a cross section of the self-weight lowering prevention unit 5 as viewed from the front.

As shown in FIG. 9, the self-weight drop prevention unit 5 is disposed so as to be interposed between the rotary shaft 201 and the drive shaft 40c, and allows the rotation of the drive shaft 40c to be transmitted to the rotary shaft 201. It prevents the rotation of the rotary shaft 201 from being transmitted to the drive shaft 40c, and is configured to include a main body case 51, an input shaft 52, an output shaft 53, and a clutch spring 54.

The main body case 51 is formed in a columnar shape in which both side surfaces are orthogonal to the left-right direction and a space is defined inside, and the drive shaft 40c is inserted into one of the both side surfaces (right direction in the drawing) and the other side. A rotary shaft 201 is inserted through the.

The input shaft 52 has a hollow cylindrical portion 521 whose one end is rotatably supported on one side of the main body case 51, and a hollow portion provided at the other end of the cylindrical portion 521 so as to extend radially outward. It has a semi-circular rotating part 522, and the drive shaft 40c is integrally rotatably inserted in the cylindrical part 521. One end of the output shaft 53 is relatively rotatable in the semi-circular rotating part 522. It has been inserted.

The output shaft 53 has a hollow cylindrical portion 531 whose one end is rotatably supported on the other side of the main body case 51, and a hollow portion provided at the other end of the cylindrical portion 531 so as to extend radially outward. It has a quarter disk rotating part 532, and the rotary shaft 201 is integrally rotatably inserted in the cylindrical part 531.

The clutch spring 54 is wound around the inner peripheral wall of the main body case 51 and the outer peripheral wall of the semicircular rotating portion 522, and both end

portions

541 and 542 thereof are arranged so as to bend in the radial direction. Therefore, the clutch spring 54 expands in diameter when one of both ends 541 and 542 is urged in the circumferential direction, and decreases in diameter when the other end is urged in the circumferential direction, and one of them is biased in the opposite circumferential direction. The diameter is reduced by being urged, and the diameter is increased by urging the other in the circumferential direction. In this embodiment, the clutch spring 54 is wound so that the one end portion 541 is urged in the descending direction and the other end portion 542 is urged in the ascending direction to reduce the diameter, and urging each in the opposite direction to increase the diameter. It has been turned. In order to reduce the diameter of the clutch spring 54, a gap is defined between the clutch spring 54 and the output shaft 53.

According to the self-weight lowering prevention unit 5 configured as described above, the rotating shaft 201 is always urged to rotate in the lowering direction by the self-weight of the bottom rail 31, so that as shown in FIG. The quarter-circle rotating portion 532 also rotates in the descending direction and urges the other end portion 542 of the clutch spring 54 in the same direction. The clutch spring 54 expands in diameter in accordance with the biasing force applied to the other end 542, but the expansion of the diameter is hindered by the main body case 51, and as a result, rotation in the downward direction that is constantly applied is prevented. Is possible. On the other hand, as shown in FIG. 10B, when the second operation unit 40b is operated and the drive shaft 40c rotates in the descending direction, the semicircular rotating portion 522 also rotates in the descending direction and one end of the clutch spring 54 is rotated. The portion 541 will be biased in the same direction. The diameter of the clutch spring 54 is reduced in accordance with the urging force applied to the one end 541, and the semicircular rotation part 522 and the quarter semicircle rotation part 532 rotate integrally via the one end 541 of the clutch spring 54. As a result, the rotation of the drive shaft 40c can be transmitted to the rotary shaft 201. This is the same when the first operation unit 40a is operated.

(Overall operation of the shielding device 1)
The operation of the shielding device 1 configured as above will be described with reference to FIGS. 11 to 15. FIG. 11 is a front view of the shielding device for explaining the fully closed state of the slats, and FIG. 12 is a front view of the shielding device for explaining the fully closed state of the slats. FIG. 13 is a front view of the shielding device for explaining the rise of the slats, and FIG. 14 is a front view showing the shielding device in a state where all the slats are elevated. FIG. 15 is a front view of the shielding device for explaining the descending of the slats.

As shown in FIG. 1, when the second operation cord 42b is pulled down to rotate the drive shaft 40c in the descending direction in the state where the bottom rail 31 is lowered to the lowest position, the first clutch mechanism 45a causes the first operating unit 45a to rotate. The rotation is not transmitted to 40a, only the rotating shaft 201 rotates in the descending direction as shown in FIG. 11, the slat 33 rotates via the ladder cord 34, and the slat 33 becomes fully closed. When the hand is released from the second operation cord 42b after this operation, the rotation shaft 201 is prevented from rotating by the own weight drop prevention unit 5, the drive shaft 40c does not rotate, and the second repulsive force of the second urging member 44b causes the second The operation cord 42b is wound around the second pulley 43b and returns to the original position.

In this state, when the first operation cord 42a is pulled down to rotate the drive shaft 40c in the upward direction, the rotation is not transmitted to the second operation unit 40a by the second clutch mechanism 45b, and the rotation is performed as shown in FIG. Only the shaft 201 rotates in the ascending direction and the slat 33 rotates in the opposite direction via the ladder cord 34, and the anti-fully closed state is established. When the hand is released from the first operation cord 42a after this operation, the rotation shaft 201 is prevented from rotating by the self weight drop prevention unit 5, the drive shaft 40c does not rotate, and the first repulsive force of the first urging member 44a causes the repulsion force to move to the first position. The operation cord 42a is wound around the first pulley 43a and returns to the original position.

When the lowering of the first operation cord 42a is repeated subsequently, the bottom rail 31 can be raised stepwise as shown in FIG. 13 to raise the slat 33, and the bottom rail 31 can be moved to the maximum position as shown in FIG. The slats 33 can be fully opened by raising the slats to the raised position. At this time, while the first operation cord 42a is being wound up after being pulled down as shown in FIG. 13 or in the fully open state shown in FIG. Although a biasing force that rotates in the descending direction is applied to the bottom rail 31, the bottom rail 31 does not descend because the self-weight lowering prevention unit 5 prevents the rotation, and the rotation is not transmitted to the drive shaft 40c side. In order to lower the slats 33 again and bring them into the fully closed state, the second operation cord 42b may be repeatedly pulled down as shown in FIG.

According to the shielding device 1 according to the present embodiment described above, the two cords of the first operation cord 42a and the second operation cord 42b are hung as separate bodies, and the first and second manipulations are further performed. Since the rotations of the first and

second pulleys

43a and 43b in different directions according to the pulling down operation of the

cords

42a and 42b can be directly transmitted to the drive shaft 40c, and further to the rotary shaft 201, the operation cords Has a higher degree of safety than a loop-shaped one, and it is possible to raise and lower the slats 33 without depending on their own weight.

Further, in the shielding device 1 according to the present embodiment, the first and

second operation units

40a and 40b have the first and second

clutch mechanisms

45a and 45b, respectively. The rotation of one of the

second pulleys

43a and 43b is not transmitted to the other of the

second pulleys

43a and 43b through the drive shaft 40c, which causes a malfunction such that the pulley on the side not operated by the operator is inadvertently operated. It can be surely prevented. In addition, in this embodiment, the rotation in the ascending direction or the descending direction is transmitted to the drive shaft 40c by repeating the pulling-down operation of the first operation code 42a and the second operation code 42b, but the self-weight drop prevention is performed. The present invention can also be applied to a shielding device equipped with a clutch mechanism capable of releasing the operation of the unit 5 or a clutch mechanism having a function capable of switching connection and disconnection between the drive shaft 40c and the rotary shaft 201. In this case, by rotating the drive shaft 40c by a predetermined amount in the direction corresponding to the

operation codes

42a and 42b, the clutch mechanism releases the connection between the drive shaft 40c and the rotary shaft 201 to allow the rotary shaft 201 to rotate. It is possible to perform the descending operation by the weight of the slat (shielding material) or the ascending operation using the biasing force of the coil spring or the like.

In addition, in the present embodiment, it is described that the shielding device according to the present invention is applied to the horizontal blind in which the slats 33 move in the vertical direction. However, the shielding device according to the present invention can be applied to any device as long as it moves the shielding material by the rotating shaft 201. FIG. 16 is a front view showing a shielding device according to another embodiment. As shown in FIG. 16, the shielding device 1 ′ is a so-called vertical blind in which the slats 33 extend in the up-down direction, and the carrier 203 is provided in one of the left and right directions according to the rotation of the rotating shaft 201 in one direction. The slat 33 moves via the carrier, and the slat 33 moves to the other of the left and right directions via the carrier 203 in accordance with the rotation of the rotating shaft 201 in the opposite direction. The shielding device 1 ′ is provided with the operating device 4 similarly to the shielding device 1, and therefore, according to the lowering of the first and

second operation cords

42 a and 42 b in the operating device 4, the rotating shaft 201 is rotated in one direction and the opposite direction. Therefore, the slats 33 can be moved in the left-right direction according to the operation amount. Although it has been described that the slat 33 is moved in the left-right direction by the rotating shaft 201, the vertical blind that moves the slat 33 by using an opening / closing cord that is wound around a pair of pulleys arranged at both ends of the rail. It goes without saying that it can be applied to.

In addition, it goes without saying that the shielding device according to the present invention can be applied to a shielding device such as a pleated screen, a roll screen, a honeycomb screen, a blind curtain such as a tuck-up curtain and an accordion door, a curtain, or a partition.

In the present embodiment, the first grip portion 422a and the second grip portion 422b have a substantially triangular shape and are inverted in the vertical direction, but as shown in FIG. 16, one is a substantially triangular shape and the other is a The shapes may be unrelated, such as a substantially quadrangle. In addition, not only the shape but also the size and the color may be different as long as the operator can easily grasp the operation unit he / she wants to operate. , And the second gripping portion 422b is the opposite) may be drawn.

<Second Embodiment>
In the above-described first embodiment, the first operation unit 40a and the second operation unit 40b have a structure in which the internal structure of the clutch mechanism and the winding directions of the biasing member and the cord member are reversed, and different internal structures. As a result, as shown in FIG. 17, the first and second

clutch mechanisms

45a and 45b are respectively moved to the left side in the left-right direction of the unit to realize a similar component arrangement. However, the two operation units may be arranged so that their component arrangements are different from each other so that the units can be shared. Hereinafter, an operating device including two operating units having a common structure as the second embodiment will be described.

FIG. 18 is a schematic front view for explaining the component arrangement of the operating device according to the second embodiment. As shown in FIG. 18, the operating device 4-1 according to the present embodiment includes two first operating units 40a and does not include the second operating unit 40b. The configuration is different from that of the operation device 4. In the operating device 4-1, the two first operating units 40a are arranged such that the surrounding portions 431 face each other. As a result, the internal structure of the first clutch mechanism 45a and the winding direction of the first biasing member 44a and the cord member 421 are reversed. Therefore, the drive shaft 40c can rotate the two first operation units 40a in different directions, that is, the first operation unit 40a on the right side in the left-right direction can have the same function as the second operation unit 40b.

According to the operation device 4-1 according to the present embodiment described above, since the two first operation units 40a having the common structure are used, the parts can be made common, and the two operation devices having the different structures can be achieved. Cost reduction can be realized as compared with the case of using the operation unit.

<Third Embodiment>
In the above-described second embodiment, each of the two first operation units 40a arranged so that the surrounding portions 431 of the two first pulleys 43a face each other has the first biasing member 44a. However, one biasing member may be shared between the two first operation units 40a. Hereinafter, an operating device including two operating units that share one urging member will be described.

FIG. 19 is a schematic front view showing the configuration of the operating device according to the third embodiment. 20A and 20B show the internal structure of the operating device according to the third embodiment. FIG. 20A is an exploded perspective view and FIG. 20B is a perspective view. As shown in FIG. 18, the operating device 4-2 according to the present embodiment differs from that of the second embodiment in that it includes a third operating unit 40d and does not have two first operating units 40a.

The third operation unit 40d is such that one pulley supports one end of the biasing member and the other pulley supports the other end of the biasing member so that the biasing member can be shared between the two pulleys. Specifically, as shown in FIGS. 20 (a) and 20 (b), the third operation unit 40d includes a first pulley 43a connected to one of the first clutch mechanisms 45a and the other first clutch. A third pulley 43d connected to the mechanism 45a and a third biasing member 44d shared between these pulleys are provided.

The first pulley 43a located on the left side of the drawing has one radially outward end of the third biasing member 44d locked to the first outer locking portion 432 formed on the surrounding portion 431 of the first operation unit 40a. There is. On the other hand, the third pulley 43d located on the right side in the drawing has a hollow cylindrical shape in which the first pulley 43a is rotatably supported and the drive shaft 40c is inserted into the hollow portion of the third pulley 43d. The support shaft 434 is provided, and a third inner locking portion 4341 that supports the other end of the third biasing member 44d in the radial direction is formed on the peripheral wall of the support shaft 434.

Similar to the second embodiment, the third pulley 43d has the same function as that of the first pulley 43a which is inverted, that is, the third pulley 43d has a cord member 421 wound in the opposite direction to the first pulley 43a. Since the second operation cord 42b that is included is connected, the drive shaft 40c is rotated in the direction opposite to the first pulley 43a (downward direction). Since the first and

third pulleys

43a and 43d are connected to the first clutch mechanism 45a, the rotation of one of the

pulleys

43a and 43d does not occur, and the other pulley does not rotate by the stopper 423. The winding of the first and

second operation cords

42a and 42b by a predetermined amount or more is restricted.

Therefore, when one of the first and

second operation cords

42a and 42b is operated to rotate one of the first and

third pulleys

43a and 43d, the locking portion (first outer side) of one pulley is rotated. Either the locking portion 432 or the third inner locking portion 4341) will rotate in the same direction. Along with this, one of both ends of the third biasing member 44d rotates in the same direction, but the unwinding direction of the cord member 421 of one pulley becomes the winding direction of the other pulley. The other pulley whose winding is regulated by the stopper 423 does not rotate in response to the rotation of either one of both ends of the third biasing member 44d. Further, since the rotation via the drive shaft 40c is not transmitted to the other pulley by the clutch mechanism 45a, the locking portion of one pulley rotates, the locking portion of the other pulley does not rotate, and When either one of the

second operation cords

42a and 42b is operated, the diameter of the third urging member 44d is reduced.

According to the operation device 4-2 of the present embodiment described above, the biasing member 44d can be shared by the first pulley 43a and the third pulley 43d, and two operation units having the same structure can be provided. Cost reduction and compactness can be realized as compared with the case of facing each other.

The surrounding portion 431 may be formed on a member other than the first pulley 43a, for example, the third pulley 43d or the main body case 41, and one of the pulleys is provided with the first outer locking portion 432. The third inner locking portion 4341 may be formed on the other pulley.

<Fourth Embodiment>
In the above-described third embodiment, the two first operation units 40a are arranged such that the surrounding portions 431 of the two are arranged to face each other, thereby sharing the adjacent first biasing member 44a. However, by disposing the two first operation units 40a so that the interlocking members 451 face each other, the two interlocking members 451 that face each other may be shared. Hereinafter, an operating device that shares the interlocking member 451 will be described.

FIG. 21 is a schematic front view showing the configuration of the operating device according to the fourth embodiment. As shown in FIG. 21, the operating device 4-3 according to the present embodiment is provided with the fourth operating unit 40e, and is different from the second embodiment in that it does not have two first operating units 40a. The configuration is different from the operating device 4-1. The fourth operation unit 40e has a structure in which the interlocking members 451 of the two clutch mechanisms 45a are integrated. Specifically, an integrated interlocking member 451e in which two interlocking members 451 are integrated is arranged at the center, and two first clutch mechanisms 45a and two first pulleys sharing the integrated interlocking member 451e on both sides thereof. 43a is provided.

The integral interlocking member 451e is formed with a plurality of engagement protrusions 4511 projecting radially inward so as to be engageable with and disengageable from the clutch pin 453 on the inner peripheral surfaces of the peripheral walls on both sides thereof at regular intervals in the circumferential direction. ing. Since the other configurations are the same as those of the two first operation units 40a facing each other, the fourth operation unit 40e includes the internal structure of the two first clutch mechanisms 45a, the first biasing member 44a, and the cord member 421. And the winding direction of (1) will be reversed with respect to the integrated interlocking member 451e. According to this, the two first pulleys 43a can rotate the drive shaft 40c in mutually different directions. Therefore, the first clutch mechanism 45a and the first pulley 43a on the right and left in the left-right direction are connected to the second clutch mechanism 45b and the second clutch mechanism 45b. A function similar to that of the pulley 43b can be provided.

According to the operation device 4-3 according to the present embodiment described above, since the two first clutch mechanisms 45a and the first pulley 43a having a common structure by including the integrated interlocking member 451e can be used, the parts can be used. It is possible to achieve commonality, and it is possible to realize cost reduction and downsizing as compared with a case where two operation units having the same structure are opposed to each other.

The present invention can be implemented in various other forms without departing from the gist or the main features. Therefore, the above-described embodiment is merely an example in all respects, and should not be limitedly interpreted. The scope of the present invention is defined by the scope of the claims, and is not bound by the text of the specification. Moreover, all modifications, various improvements, substitutions and modifications within the scope of equivalents of the claims are within the scope of the present invention.

1,1 'Shielding device 201 Rotating shaft 33 slat (shielding material)

40c Drive shaft

43a 1st pulley

43b 2nd pulley

43d 3rd pulley 42a 1st operation code (1st operation member)
42b Second operation code (second operation member)
421 cord member (first and second operation members)
422a 1st holding part 422b 2nd holding part 44a 1st biasing member 44b 2nd biasing member 44d 3rd biasing member 45a 1st clutch mechanism (clutch means, 1st clutch part)
45b Second clutch mechanism (clutch means, second clutch section)
5 Self-weight drop prevention unit (rotation blocking part)

Claims

The shield is driven to rotate in one direction so as to perform a first operation, and is rotated to rotate in a reverse direction opposite to the one direction to perform a second operation different from the first operation. A drive shaft that drives the material,
A first pulley capable of rotating the drive shaft only in the one direction;
A second pulley capable of rotating the drive shaft only in the opposite direction;
A first operating member for rotating the first pulley;
And a second operating member for rotating the second pulley.
Clutch means provided between the first and second pulleys and the drive shaft for transmitting the rotation of the first pulley in the one direction and the rotation of the second pulley in the opposite direction to the drive shaft. Further preparation,
The clutch means transmits the rotation of one of the first and second pulleys to the drive shaft, and drives the other pulley while the drive shaft rotates in response to the rotation. The shield device according to claim 1, wherein transmission of rotation of the shaft is blocked.
The said clutch means has the 1st clutch part provided in the said 1st pulley, and the 2nd clutch part provided in the said 2nd pulley. The shielding apparatus of Claim 1 or Claim 2 characterized by the above-mentioned. ..
The said clutch means is provided between the said 1st pulley and the said 2nd pulley. The shielding apparatus of Claim 1 or Claim 2 characterized by the above-mentioned.
One end of the first operating member is connected to the first pulley so as to be able to be wound and unwound, and the first pulley is rotated in the one direction by being operated so as to be unwound,
The second operating member is connected to the second pulley so as to be able to be wound and unwound, and is operated so as to be unwound so that the second pulley rotates in the opposite direction.
The shielding device according to any one of claims 1 to 4, wherein the first operating member and the second operating member have different winding and unwinding directions from each other.
The first operating member and the second operating member are respectively wound by urging the first pulley to rotate in the opposite direction and urging the second pulley to rotate in the one direction. The shielding device according to claim 5, further comprising a biasing member that biases in a direction.
The urging member is provided on the first pulley and is provided on the first urging member that urges the first pulley to rotate in the opposite direction, and the second pulley, and the second pulley is It has a 2nd biasing member which biases so that it may rotate to one direction. The shielding device according to claim 6 characterized by things.
The urging member has one end connected to the first pulley and the other end connected to the second pulley, and urges the first and second pulleys to rotate in mutually different directions. The shielding device according to claim 6, wherein:
The first and second pulleys are pulleys having the same structure, and are arranged in parallel so that their rotation axes are on the rotation axis of the drive shaft, and are also arranged so as to be inverted with respect to each other. The shielding device according to any one of claims 1 to 8.
The drive shaft drives the shield member by transmitting rotation to a rotary shaft connected to the shield member,
A rotation blocking unit is provided between the drive shaft and the rotary shaft to allow the rotation of the drive shaft to be transmitted to the rotary shaft and prevent the rotation of the rotary shaft from being transmitted to the drive shaft. The shielding device according to any one of claims 1 to 9, wherein:
One end of the first operating member is connected to the first pulley so as to be able to be wound and unwound, and the other end is connected to a first grip portion for an operator to grip,
One end of the second operation cord is connected to the second pulley so as to be able to be wound and unwound, and the other end is connected to a second grip portion for an operator to grip,
The shielding device according to any one of claims 1 to 10, wherein the first grip portion and the second grip portion are different in at least one of shape, size, and color.