JP5164908B2 - blind - Google Patents

Description

  The present invention relates to a blind capable of separately moving up and down both ends of a shielding material.

  Conventionally, as this type of blind, there is one described in Patent Document 1. The blind described in Patent Document 1 hangs a screen having a configuration in which a lower screen and an upper screen, which can be folded in the vertical direction, are connected in the vertical direction from the head box, and is suspended from the head box so as to be raised and lowered. One end of the lifting / lowering cord is connected to the lower end of the lower screen, and one end of the opening / closing cord suspended from the head box so as to be lifted / lowered is connected to a connecting portion between the lower screen and the upper screen.

  According to this, the upper end of the lower screen can be raised and lowered by raising and lowering the opening / closing cord, and the lower end of the lower screen can be raised and lowered by raising and lowering the elevation cord. Further, by disconnecting the upper end of the upper screen from the head box, the upper end of the upper screen and the head box can be completely opened without a screen.

JP 2000-248855 A

  In the conventional blind, as shown in FIG. 20, when the upper end 73 of the upper screen 72 is not connected to the head box 70 and is lowered from the head box 70, the upper screen 72 is folded in the lower state. When the lifting / lowering cord 78 is raised and the lower end 76 of the lower screen 74 is raised in this state, the lower screen is completely folded and then the lower screen is moved upward. Since the connecting portion with the screen is pushed up, the opening / closing cord 80 is loosened.

  Since no resistance acts on the space between the upper end 73 of the upper screen 72 and the head box 70, the slack open / close cord 80 is pushed into the head box 70 by the stiffness of the cord as shown in FIG. In such a state, a force in the direction of releasing the stopper 82 may be applied to the stopper 82, and there is a problem that the stopper 82 is released without permission. Such a phenomenon is likely to occur when the space between the upper end 73 of the upper screen 72 and the head box 70 is a gap that does not allow the opening / closing cord 80 to hang under its own weight.

  When the stopper 82 is released as described above, when the lifting cord 78 is lowered to lower the lower screen 72 next time, the connecting portion 75 with the upper screen 72 is lowered by its own weight, The lower screen 74 is lowered in a folded state, and there is a problem that the lower screen 74 moves up and down different from the user's intention.

  The present invention has been made in view of such a problem, and when there is a gap between the upper end of the shielding material and the head box, when the first lifting cord is raised to raise the lower end of the shielding material, It is an object of the present invention to provide a blind capable of preventing a stopper that restricts the movement of the second lifting / lowering cord from being released by another second lifting / lowering cord for raising and lowering the upper end of the shielding material. .

In order to achieve the above-described object, the invention described in claim 1 is characterized in that a shielding material disposed below the head box and one end suspended from the head box are connected to the lower end of the shielding material, and the lower end of the shielding material. A first lifting cord capable of moving up and down, one end hanging from the head box is connected to the upper end of the shielding material, the second lifting cord capable of raising and lowering the upper end of the shielding material, and the movement of the second lifting code are regulated and released It has a stopper that makes it possible and an operation part that operates the stopper,
The stopper includes a stopper case through which the second lifting / lowering cord is inserted, and a lock portion that locks the second lifting / lowering cord and restricts movement, and the second lifting / lowering portion is moved by moving the locking portion toward the non-operation portion side. In the blind that can lock the cord,
In the head box, when the upper end of the shielding material is pushed upward by the first lifting / lowering cord with the stopper restricting the movement of the second lifting / lowering cord, the second lifting / lowering cord moves the lock portion toward the operation portion. Code return prevention means for preventing movement is provided.

The invention according to claim 2 is a shielding material disposed below the head box, and a first raising / lowering cord capable of raising and lowering the lower end of the shielding material by connecting one end hanging from the head box to the lower end of the shielding material. , One end hanging from the head box is connected to the upper end of the shielding material, the second raising / lowering cord capable of raising and lowering the upper end of the shielding material, the stopper capable of restricting and releasing the movement of the second raising / lowering cord, and operating the stopper And an operation unit to
The stopper includes a stopper case through which the second lifting / lowering cord is inserted, and a lock portion that locks the second lifting / lowering cord and restricts movement, and the second lifting / lowering portion is moved by moving the locking portion toward the non-operation portion side. In the blind that can lock the cord,
The head box prevents transmission of force from the second lifting / lowering cord to the stopper when the upper end of the shielding member is pushed upward by the first lifting / lowering cord while the stopper restricts the movement of the second lifting / lowering cord. A code return prevention means is provided.

  According to a third aspect of the present invention, the cord return prevention means according to the first or second aspect is provided on a path along which the second lifting / lowering cord is routed between the stopper and the upper end of the shielding member. (2) A spring that presses the lifting / lowering cord and guides a slack portion of the second lifting / lowering cord generated between the upper end of the shielding material and the stopper in a bent shape.

  According to a fourth aspect of the present invention, the cord return prevention means according to the first or second aspect is provided on a path along which the second lifting / lowering cord is routed between the stopper and the upper end of the shielding member. It is a friction body that applies a predetermined amount of load to the lifting / lowering cord and regulates the movement of the second lifting / lowering cord pushed up by the upper end of the shielding material.

  According to a fifth aspect of the present invention, in the cord return prevention means according to the first or second aspect, the guide roller for guiding the second lifting / lowering cord introduced into the head box to the stopper and the second lifting / lowering cord separate from the stopper. And a spring for pressing the guide roller in the direction.

  According to a sixth aspect of the present invention, the cord return preventing means according to the fifth aspect further includes a second guide roller disposed at a predetermined interval along the longitudinal direction of the guide roller and the head box, and a spring. The second elevating cord can be sandwiched between the guide roller pressed by the second guide roller and the second guide roller.

  According to a seventh aspect of the present invention, the cord return prevention means according to the fifth aspect further includes an elastic member disposed above the guide roller, and the second elevating cord is formed by the guide roller and the elastic member pressed by a spring. It is characterized by being able to be sandwiched.

  According to the present invention, in a state where a gap is generated between the head box and the upper end of the shielding material, the first elevating cord is raised to raise the lower end of the shielding material, and the upper end of the shielding material is pushed up, As a result, even if the second lifting / lowering cord is pushed up, the action of the cord return prevention means prevents the second lifting / lowering cord from applying a force to the stopper in the direction of releasing the stopper. Thereby, it is possible to prevent the stopper from being inadvertently released, and it is possible to prevent a lifting operation that is not assumed by the user.

  In addition, by providing the cord return prevention means on the path along which the second lifting / lowering cord is routed between the stopper and the upper end of the shielding material, Since the transmission of force by the acting lifting cord can be blocked, it is possible to reliably prevent the stopper from being released.

In 1st Embodiment of this invention, it is the whole front view which shows the state which the upper end of the shielding material has stopped in the up-down direction middle position. It is a whole front view which shows the state which the upper end of the shielding material is raising to the upper limit position. It is a whole front view which shows the state which the lower end of the shielding material has stopped in the up-down direction middle position. It is a sectional side view which shows the state in a head box when the upper end of a shielding material has stopped in the up-down direction middle position. It is a sectional side view of the head box which shows a state when raising the lower end of a shielding material. It is a sectional side view of a head box which shows a state when the upper end of a shielding material is pushed up. It is a top view of the stopper of the released state. It is a top view of the stopper of the state which has latched. (A) is a plan view of the stopper showing a locked state, (b) is a plan view of the stopper showing a state when the operation unit is operated from the state (a), (c) It is a top view of the stopper which shows the state which canceled operation of the operation part from the state of (b), (d) is a top view of the stopper which shows a state when operating the operation part again from the state of (c). . It is a top view which shows the state at the time of the non-operation of the cord return prevention means of 1st Embodiment. It is a top view which shows the state at the time of the action | operation of the cord return prevention means of 1st Embodiment. It is a front view which shows typically the state of a light control cord and a code | cord | chord return prevention means when the upper end of the shielding material has stopped in the up-down direction halfway position in 1st Embodiment. It is a front view which shows typically the state of the light control cord and cord return prevention means when the upper end of a shielding material is pushed up in 1st Embodiment. It is a front view which shows typically the state of a light control cord and a code | cord | chord return prevention means when the upper end of the shielding material has stopped in the up-down direction halfway position in 2nd Embodiment. It is a front view which shows typically the state of the light control cord and cord return prevention means when the upper end of the shielding material is pushed up in 2nd Embodiment. It is a front view which shows typically the state of a light control cord and a code | cord | chord return prevention means when the upper end of the shielding material is stopping in the up-down direction halfway position in 3rd Embodiment. It is a front view which shows typically the state of the light control cord and cord return prevention means when the upper end of the shielding material is pushed up in 3rd Embodiment. It is a front view which shows typically the state of a light control cord and a code | cord | chord return prevention means when the upper end of the shielding material has stopped in the up-down direction halfway position in 4th Embodiment. It is a front view which shows typically the state of the light control cord and cord return prevention means when the upper end of a shielding material is pushed up by the shielding material in 4th Embodiment. It is a front view which shows a state when the connection part has stopped in the up-down direction middle position in the prior art. It is a front view which shows typically the state of the cord for opening and closing and a stopper when a connection part is pushed up by the lower screen in a prior art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIGS. 1 to 3, the blind of the present invention includes a head box 10 that is attached to a fixed attachment portion such as a window frame or a wall, and a shielding material 12 is disposed below the head box 10. The

  An intermediate bar 14 is provided at the upper end of the shielding material 12, and a bottom rail 16 is provided at the lower end of the shielding material 12. The shielding material 12 may be any type (for example, a slat row), but in this example, a large number of ridges are formed in the vertical direction and are pleated screens that can be folded in the vertical direction. .

  One end of a plurality of dimming cords 18 is connected to the intermediate bar 14 with appropriate separation in the longitudinal direction, and the other end of each dimming cord 18 is introduced into the head box 10 and guided to the guide roller 19. Then, the direction is changed and guided to the stopper 20. The other end of the light control cord 18 inserted through the stopper 20 is suspended from one end of the head box 10 to form an operation unit 18a.

  The stopper 20 can restrict and release the movement of the dimming cord 18, and can switch between restriction and deregulation by operating the operation portion 18 a of the dimming cord 18 that passes through the stopper 20. In the state where the restriction of the movement of the light control cord 18 is released by the stopper 20, the light adjustment cord 18 is raised and lowered, so that the upper end of the shielding material 12 is raised and lowered, and the stopper 20 restricts the movement of the light adjustment cord 18. Thus, the movement of the light control cord 18 due to its own weight such as the intermediate bar 14 acting on the light control cord 18 can be restricted, and the upper end of the shielding material 12 can be stopped at an arbitrary height (for example, FIGS. 1 and 2). See state).

  Similarly, one end of a plurality of lifting / lowering cords 22 is connected to the bottom rail 16 at an appropriate distance in the longitudinal direction, and the other end of the lifting / lowering cords 22 is inserted through the shielding member 12 and the intermediate bar 14 and viewed from the front. , The light control cord 18 partially overlaps, is introduced into the head box 10, is guided by the second guide roller 23, changes direction, and is guided to the stopper 24. The other end of the lifting / lowering cord 22 inserted through the stopper 24 is suspended from the other end of the head box 10 to form an operation portion 22a.

  The stopper 24 can restrict and release the movement of the lifting / lowering cord 22, and can switch between restriction and release by operating the operation portion 22 a of the lifting / lowering cord 22 that passes through the stopper 24. In the state where the restriction of the movement of the lifting / lowering cord 22 is released by the stopper 24, the lowering / lowering cord 22 is lifted / lowered, the lower end of the shielding material 12 is lifted / lowered, and the stopper 24 restricts the movement of the lifting / lowering cord 22; The movement of the lifting / lowering cord 22 due to its own weight such as the bottom rail 16 acting on the lifting / lowering cord 22 can be restricted, and the lower end of the shielding material 12 can be stopped at an arbitrary height (see, for example, the states of FIGS. 2 and 3). .

  The stoppers 20 and 24 can be any mechanism known as a stopper, and are roughly a stopper case through which the lifting / lowering cord is inserted, and a lock that locks against the lifting / lowering cord that passes through the stopper case and restricts its movement. Part. Such a stopper device operates in the opposite direction to the operating force received by the lock portion from the operation portion when the lock portion locks the lift cord by operating the operation portion and restricts the movement of the lift cord. It is designed to move to the non-operating part side, and on the contrary, the lock part after the regulation moves to the operating part side in the same direction as the operating force received from the operating part, so that the lifting cord is unlocked. Yes.

  FIGS. 4 to 8 show a specific configuration as an example. The stopper 20 is fixed to the head box 10, and a stopper case 26 through which the dimming cord 18 is inserted, and the dimming cord inside the stopper case 26. The slider 28 that can be slid to move together with the slider 18, the receiving roller 30 provided in the stopper case 26, and the slider 28 moves together with the slider 28, and the dimming cord 18 is connected to the receiving roller 30. A clamping roller 32 is provided as a lock unit that clamps and locks the dimming cord 18 to regulate movement, and a regulation mechanism 34 that regulates movement of the slider 28.

  The restricting mechanism 34 is slidably fitted in a guide cam groove 36 formed on the lower side of the bottom surface of the slider 28 and a groove 26a formed on the upper surface of the bottom surface of the stopper case 26 and extending in the front-rear direction. And an engaging member 38 having a pin portion 38a to be inserted into the engaging member 38. A heart-shaped cam projection is formed at the center of the guide cam groove 36 so that the pin portion 38a relatively moves around the cam projection, as shown in FIGS. 9 (a) to 9 (d). A stop position 36a where the pin portion 38a is positioned when the blind is stopped and a plurality of locking portions 36b, 36c and 36d where the pin portion 38a is sequentially locked are formed. When the pin portion 38a is locked to each locking portion, further relative movement in the same direction is restricted.

  The action of the stopper 20 will be explained. When the stopper 20 restricts the movement of the light control cord 18, the weight of the intermediate bar 14 or the like causes the light adjustment cord 18 to move in the direction in which the intermediate bar 14 is lowered. Tension is applied. At this time, as shown in FIG. 8 and FIG. 9A, in order to lock the light control cord 18 by the sandwiching roller 32, the light control cord 18 is sandwiched between the receiving roller 30 and the sandwiching roller 32. The slider 28 is moved to the leftmost side in the drawing, and the pin portion 38a is located at the stop position 36a (first state).

  When the operation unit 18 a is pulled downward from the first state, the dimming cord 18 moves to the right in FIG. 7 (that is, the direction of raising the intermediate bar 14 on the operation unit side), and together with the dimming cord 18 The slider 28 moves. Along with this, the pin portion 38a of the engagement element 38 relatively moves from the stop position 36a shown in FIG. When the pin portion 38a reaches the locking portion 36b in FIG. 9B, the further movement of the slider 28 relative to the stopper case 26 is restricted. In this state, as shown in FIG. 7, since the clamping roller 32 is separated from the receiving roller 30, the dimming cord 18 is no longer clamped between them, and the dimming cord 18 is released (second). State).

  Next, when the operation force is released by loosening the operation to the operation portion 18a, the dimming cord 18 moves in the left direction in FIG. 7 (that is, the direction opposite to the operation portion side) due to the weight of the intermediate bar 14 or the like. . At this time, since the slider 28 moves together with the dimming cord 18, the pin portion 38a of the engaging element 38 relatively reaches the engaging portion 36c shown in FIG. 9C from the engaging portion 36b. Then, further movement of the slider 28 relative to the stopper case 26 is restricted. For this reason, the state where the clamping roller 32 is separated from the receiving roller 30 is maintained, and the dimming cord 18 is maintained in the released state (third state).

  Next, when the operation portion 18a is pulled downward, the dimming cord 18 moves in the right direction in FIG. 7 (that is, the direction of raising the intermediate bar 14 on the operation portion side), and the slider 28 moves along with this. . Accordingly, when the pin portion 38a of the engaging element 38 relatively reaches the engaging portion 36d shown in FIG. 9D from the locking portion 36c, the further movement of the slider 28 relative to the stopper case 26 is restricted. Is done. Even in this state, since the clamping roller 32 is separated from the receiving roller 30, the dimming cord 18 is maintained in the released state (fourth state).

  Next, when the operation force is released by loosening the operation to the operation portion 18a, the dimming cord 18 moves in the left direction in FIG. 7 (that is, the direction opposite to the operation portion side) due to the weight of the intermediate bar 14 or the like. . At this time, the slider 28 moves together with the dimming cord 18, and accordingly, the pin portion 38a of the engaging element 38 relatively reaches the stop position 36a from the locking portion 36d. As a result, the sandwiching roller 32 approaches the receiving roller 30 together with the dimming cord 18 and locks the dimming cord 18 again.

  As described above, the stopper 20 sequentially repeats the first state to the fourth state in accordance with the operation of the light control unit 18a.

  As shown in FIGS. 4 to 6, a cord return preventing means 40 is disposed in the head box 10 in the vicinity of the lower surface of the head box 10 located below the guide roller 19. That is, as shown in enlarged views in FIGS. 10 and 11, the cord return prevention means 40 includes a case 44 fixed to the lower surface of the head box 10, a slide member 42 that can slide in the case 44, and one end thereof. A spring 46 connected to the slide member 42 and having the other end connected to the end of the case 44. The slide member 42 is formed with an insertion hole 42a through which the dimming cord 18 is inserted and a notch 42b through which the lifting / lowering cord 22 is inserted, and the spring 46 is disposed so as to be able to expand and contract in the sliding direction of the slide member 42. ing.

  As shown in FIG. 10, when tension is applied to the dimming cord 18, the dimming cord 18 is pulled linearly between the guide roller 19 and the intermediate bar 14, so that it slides through the insertion hole 42a. The member 42 is located almost directly below the guide roller 19. At this time, the spring 46 is extended and stored.

  Further, as shown in FIG. 11, when no tension is applied to the dimming cord 18, no force is applied to position the slide member 42 closer to the guide roller 19, so the spring 46 causes the slide member 42 to be moved by a restoring force. Move away from the guide roller 19.

Next, the operation of the present embodiment will be described.
As shown in FIG. 1, when the intermediate bar 14 is stopped at an intermediate position in the vertical direction, the dimming cord 18 is interposed between the receiving roller 30 and the sandwiching roller 32 as shown in FIGS. 4 and 12. The movement is regulated by being pinched by. At this time, the dimming cord 18 is tensioned in the direction in which the intermediate bar 14 is lowered by its own weight such as the intermediate bar 14. Therefore, in the cord return prevention means 40, the spring 46 is extended, and the slide member 42 is a guide. It is located almost directly below the roller 19.

  From this state, when the operating portion 22a is operated to raise the lifting / lowering cord 22 and the bottom rail 16 is raised, the lower end of the shielding material 12 rises and the shielding material 12 is folded. The fully folded shield 12 then pushes up the intermediate bar 14 as shown in FIG. When the intermediate bar 14 is pushed up, the interval between the intermediate bar 14 and the head box 10 is narrowed. However, the portion between the receiving roller 30 and the pinching roller 32 of the stopper 20 and the intermediate bar 14 is narrowed. Since the length of the dimming cord 18 does not change before and after the intermediate bar 14 is pushed up, the dimming cord 18 loosens during this time. As a result, no force from the dimming cord 18 is applied to the slide member 42. Therefore, as shown in FIGS. 6 and 13, in the cord return prevention means 40, the slide member 42 is moved by the biasing force of the spring 46. Move away from directly below. Then, the dimming cord 18 is bent and the cord return prevention means 40 absorbs the slack of the dimming cord 18, so that the dimming cord 18 is not pushed toward the stopper 20. It is possible to prevent movement in the release direction. The cord return prevention means 40 is not intended to absorb all the slack that occurs in the dimming cord 18, and the amount of looseness that can be absorbed is slight. 18 acts to prevent the slack of the light control cord 18 from being transmitted toward the stopper 20, and also prevents the force from the light control cord 18 to release the stopper 20 from being transmitted to the stopper 20. Inadvertent release of the stopper 20 can be prevented.

  Further, since the slide member 42 has no effect on the lifting / lowering cord 22 on which tension is applied, the sliding member 42 does not hinder the lifting / lowering cord 22 from being lifted / lowered.

  Thus, inadvertent release of the stopper 20 can be prevented. Next, when the operating portion 22a is operated to lower the lifting cord 22 and lower the bottom rail 16, the intermediate bar 14 remains stopped. That is, the position of the upper end of the shielding material 12 is not changed, and the lower end of the shielding material 12 is lowered and the shielding material 12 is exposed. Therefore, the lifting operation conforms to the user's intention.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS. Since the configuration other than the following is the same as that of the first embodiment, detailed description thereof is omitted.

  In the second embodiment, the cord return prevention means is a leaf spring 50 as a friction body that applies a frictional force to the dimming cord 18, and the leaf spring 50 is a dimming cord between the stopper 20 and the intermediate bar 14. For example, it is provided in the vicinity of the outlet of the stopper 20. The leaf spring 50 applies a predetermined amount of load to the dimming cord 18 by sandwiching the dimming cord 18 and restricts the movement of the dimming cord 18 pushed up by the intermediate bar 14.

  The load applied to the dimming cord 18 by the leaf spring 50 is such that when the dimming cord 18 is moved in the upward direction of the intermediate bar 14 by operating the operation portion 18a, the dimming cord 18 is intermediate due to its own weight. When moving in the bar 14 lowering direction, the movement of the dimming cord 18 is not restricted, but the movement of the dimming cord 18 due to the intermediate bar 14 being pushed up by the rising of the shielding member 12 is set to be restricted.

  Also in the second embodiment configured as described above, when the dimming cord 18 is loosened and tries to move toward the stopper 20, the movement is restricted by the leaf spring 50. The slack of the light control cord 18 is prevented from being transmitted to the stopper 20, and the force for releasing the stopper is prevented from being transmitted from the light control cord 18 to the stopper 20. Inadvertent release of the stopper 20 can be prevented.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. Since the configuration other than the following is the same as that of the first embodiment, detailed description thereof is omitted.

  In the third embodiment, the cord return prevention means 60 presses the dimming cord 18 in the direction away from the stopper 20 and the guide roller 19 that guides the dimming cord 18 introduced into the head box 10 to the stopper 20. The spring 62 is configured to urge the guide roller 19 in such a manner. The biasing force of the spring 62 is such that when the operation portion 18a is operated to move the dimming cord 18 in the upward direction of the intermediate bar 14, the dimming cord 18 moves in the downward direction of the intermediate bar 14 due to its own weight. The light control cord 18 to which the tension is applied as in the case of the time is set so as to hardly act.

  Also in the third embodiment configured as described above, when the dimming cord 18 is slack, the guide roller 19 presses the dimming cord 18 away from the stopper 20 by the biasing force of the spring 62. As a result, the dimming cord 18 is bent, and the slack of the dimming cord 18 is absorbed by the cord return prevention means 60, so that the dimming cord 18 can be prevented from moving the clamping roller 32 in the release direction.

  Further, in the third embodiment, the second guide roller 23 can be included as the cord return preventing means 60, and the dimming cord 18 is pressed toward the second guide roller 23 provided with the guide roller 19 in parallel. By doing so, the dimming cord 18 may be sandwiched between the guide roller 19 and the second guide roller 23 as shown in FIG. As a result, the slack of the light control cord 18 is absorbed, the slack of the light control cord 18 is prevented from being transmitted from the guide roller 19 toward the stopper 20, and the stopper is released from the light control cord 18 to the stopper 20. It is possible to prevent the transmission force from being transmitted, and to prevent the stopper 20 from being inadvertently released.

(Fourth embodiment)
A fourth embodiment of the present invention will be described with reference to FIGS. Since the configuration other than the following is the same as that of the first embodiment, detailed description thereof is omitted.

  In the third embodiment, the urging direction of the spring 62 of the cord return prevention means 60 is parallel to the longitudinal direction of the head box 10, whereas in the fourth embodiment, the direction of the spring 62 is changed. The urging direction is directed to the up and down direction of the head box 10. The cord return preventing means 60 further includes a leaf spring 64 (elastic member) provided above the guide roller 19.

  Also in the cord return prevention means 60, when the slack of the light control cord 18 is smaller than the distance between the guide roller 19 and the leaf spring 64, the slack is absorbed by the upward movement of the guide roller 19 by the pressing force of the spring 62. When the slack of the light control cord 18 becomes larger than the distance between the guide roller 19 and the leaf spring 64, the guide roller 19 comes into contact with the leaf spring 64, and the light adjustment cord 18 is sandwiched between them. The slack of the light control cord 18 can be prevented from being transmitted from the guide roller 19 toward the stopper 20, and the force for releasing the stopper can be prevented from being transmitted from the light control cord 18 to the stopper 20. Inadvertent release of the stopper 20 can be prevented.

10 Head box 12 Shielding material 14 Intermediate bar (upper end)
16 Bottom rail (lower end)
18 Dimming cord (second lifting cord)
18a Operation unit 19 Guide roller 20 Stopper 22 Lift code (first lift code)
23 Second guide rollers 40, 60 Cord return prevention means 46 Spring 50 Leaf spring (friction body, cord return prevention means)
62 Spring 64 Leaf spring (elastic member)

Claims (7)

The shielding material (12) disposed below the head box (10) and one end hanging from the head box (10) are connected to the lower end (16) of the shielding material (12), so that the shielding material (12) A first lifting / lowering cord (22) capable of raising and lowering the lower end and one end hanging from the head box (10) are connected to the upper end (14) of the shielding member (12), and the upper end of the shielding member (12) can be raised and lowered. 2 a lifting / lowering cord (18), a stopper (20) that enables regulation and release of the movement of the second lifting / lowering cord (18), and an operation portion (18a) for operating the stopper,
The stopper (20) includes a stopper case (26) through which the second lifting / lowering cord (18) is inserted, and a lock portion (32) that locks the second lifting / lowering cord (18) and restricts its movement. In the blind that can lock the second elevating cord by moving the lock part to the non-operation part side,
When the upper end of the shielding member (12) is pushed upward by the first lifting / lowering cord (22) with the stopper (20) restricting the movement of the second lifting / lowering cord (18), the head box (10) And a cord return preventing means (40, 50, 60) for preventing the second lifting / lowering cord from moving the lock portion toward the operation portion. The shielding material (12) disposed below the head box (10) and one end hanging from the head box (10) are connected to the lower end (16) of the shielding material (12), so that the shielding material (12) A first lifting / lowering cord (22) capable of moving up and down the lower end and one end hanging from the head box (10) are connected to the upper end of the shielding member (12), and the upper end (14) of the shielding member (12) can be moved up and down. 2 a lifting / lowering cord (18), a stopper (20) that enables regulation and release of the movement of the second lifting / lowering cord (18), and an operation portion (18a) for operating the stopper,
The stopper (20) includes a stopper case (26) through which the second lifting / lowering cord (18) is inserted, and a lock portion (32) that locks the second lifting / lowering cord (18) and restricts its movement. In the blind which can lock the second lifting / lowering cord by moving the lock part to the non-operation part side,
When the upper end of the shielding member (12) is pushed upward by the first lifting / lowering cord (22) with the stopper (20) restricting the movement of the second lifting / lowering cord (18), the head box (10) Further, a cord return prevention means (40, 50, 60) for preventing transmission of force from the second lifting / lowering cord to the stopper is provided.   The cord return prevention means (40) is provided on a path along which the second lifting / lowering cord (18) is routed between the stopper (20) and the upper end (14) of the shielding member, and the second lifting / lowering cord A spring (46) that presses (18) and guides the slack portion of the second lifting / lowering cord (18) generated between the upper end (14) of the shielding material and the stopper (20) in a bent shape. The blind according to claim 1 or 2.   The cord return prevention means (50) is provided on a path along which the second lifting / lowering cord (18) is routed between the stopper (20) and the upper end (14) of the shielding member, and the second lifting / lowering cord ( The friction body (50), which applies a predetermined amount of load to 18) and regulates the movement of the second lifting / lowering cord (18) pushed up by the upper end (14) of the shielding member. Blinds.   The cord return prevention means (60) includes a guide roller (19) for guiding the second lifting / lowering cord (18) introduced into the head box (10) to the stopper (20), and a second lifting / lowering cord (18). The blind according to claim 1 or 2, further comprising a spring (62) for pressing the guide roller (19) in a direction away from the stopper (20).   The cord return prevention means (60) further includes a second guide roller (23) disposed at a predetermined interval along the longitudinal direction of the guide roller (19) and the head box (10), and a spring ( The blind according to claim 5, wherein the second elevating cord can be sandwiched between the guide roller (19) and the second guide roller (23) pressed by 62).   The cord return prevention means (60) further includes an elastic member (64) disposed above the guide roller (19), and the guide roller (19) and the elastic member (64) pressed by the spring (62). The blind according to claim 5, wherein the second elevating cord can be sandwiched between the two.

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