JP2012122217A - Restricted lifting/lowering height determination device for blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a restricted lifting/lowering height determination device for a blind capable of adjusting a restricted lifting/lowering height position with simple work.SOLUTION: A restricted lifting/lowering height determination device for a blind comprises a support shaft 18 disposed in a head box 12, a take-up pipe 16 that is able to axially move on the support shaft 18 while rotating with the lifting/lowering of a screening material 24 and has an abutting portion 16a and a stopper 26 that abuts the abutting portion 16a of the take-up pipe 16 that axially moves on the support shaft 18 when the screening material 24 reaches a restricted lifting/lowering height position. The stopper 26 is detachable from a fixing member 20 disposed in the head box 12 and engageable thereto in multiple positions. An abutting position between the take-up pipe 16 and the stopper 26 is varied by adjusting an engagement position of the stopper 26 with the fixing member 20. Thereby, the restricted lifting/lowering height position can be adjusted.

Description

  The present invention is capable of regulating the elevation of the shielding material when the shielding material reaches a desired elevation regulation height position, and the elevation regulation height determining device for the blind capable of adjusting the elevation regulation height position. About.

  2. Description of the Related Art Conventionally, a device described in Patent Document 1 is known as this type of blind lifting height determining device. This device includes a screw shaft that is externally fitted so as to rotate integrally with a rotary shaft, a moving piece that is externally fitted so as to be screw-engaged with the screw shaft, and the rotation of the moving piece is controlled to move in the axial direction. A guide and a stopper that stops the rotation of the rotary shaft by contacting the moving piece at the lower limit position such as the bottom rail.

  When the shielding shaft is moved up and down by rotating the rotating shaft, the screw shaft rotates and the moving piece moves axially on the screw shaft. When the shielding material reaches the lower limit position, the moving piece comes into contact with the stopper and stops. Therefore, the rotation of the screw shaft and the rotation shaft is stopped, and the shielding material can be stopped at the lower limit position which is a predetermined elevation restriction height position.

JP 2005-282133 A

  However, in the conventional lifting restriction height determining device, in order to adjust the lifting restriction height position, it is necessary to adjust the position of the moving piece with respect to the screw shaft. For this reason, it is necessary to remove the device from the head box and disassemble it, adjust the position of the moving piece with respect to the screw shaft, and then reassemble the device.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a blind lifting restriction height determining device capable of adjusting the lifting restriction height position with a simple operation.

In order to achieve the above-described object, the invention described in claim 1 is capable of moving in the axial direction on the support shaft while rotating with the support shaft disposed in the head box and the lifting and lowering of the shielding material. A moving member having an abutting portion, and a stopper that abuts on the abutting portion of the moving member that moves in the axial direction on the support shaft when the shielding material reaches the elevation restriction height position.
The stopper is detachable with respect to a fixing member arranged in the head box and can be engaged at a plurality of positions. By adjusting the engaging position of the stopper with respect to the fixing member, the moving member and the stopper The abutment restriction height position can be adjusted by changing the abutment position.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the angle of the stopper around the rotation direction of the moving member is changed by changing the engaging position of the stopper with respect to the fixed member. To do.

  The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the protrusion amount of the stopper protruding from the fixing member is changed by changing the engaging position of the stopper with respect to the fixing member. And

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a plurality of step portions are formed on the contact surfaces of the fixing member and the stopper, respectively. By changing the engagement angle, the stepped portions that come into contact with each other are changed, and the protrusion amount of the stopper from the fixing member is changed.

According to a fifth aspect of the present invention, there is provided a support shaft disposed in the head box, a moving member having an abutment portion that is movable in the axial direction on the support shaft while rotating as the shielding material is raised and lowered. A stopper that comes into contact with the contact portion of the moving member that moves in the axial direction on the support shaft when the shielding material reaches the elevation restriction height position,
The abutting portion is detachable with respect to the moving member and can be engaged at a plurality of positions. By adjusting the engaging position of the abutting portion with respect to the moving member, the abutting between the moving member and the stopper is achieved. The position is changed, and the elevation restriction height position is adjustable.

  According to a sixth aspect of the invention, in the fifth aspect of the invention, the angle of the abutting portion around the rotational direction of the moving member is changed by changing the engagement position of the abutting portion with respect to the moving member. It is characterized by that.

  According to a seventh aspect of the invention, in the fifth or sixth aspect of the invention, the amount of protrusion of the contact portion protruding from the moving member is changed by changing the engagement position of the contact portion with the moving member. It is characterized by that.

  The invention according to claim 8 is the invention according to any one of claims 5 to 7, wherein a plurality of step portions are formed on the contact surfaces of the moving member and the contact portion, respectively. By changing the engagement angle of the abutting portion with respect to, the stepped portions which are in contact with each other are changed, and the protruding amount of the abutting portion from the moving member is changed.

  According to the present invention, at the time of assembling the blind, in the inspection stage after the assembly or the blind installation stage, the stopper or the abutting portion is attached to and detached from the fixed member or the moving member, and the engagement position is adjusted, so Since the regulated height position can be adjusted, the adjustment can be performed with a simple operation. Since the structure is simple, it can be improved at low cost.

  By changing the angle of the stopper or the contact portion around the rotation direction of the moving member, the contact position between the moving member and the stopper can be changed to adjust the elevation restriction height position.

  By changing the amount of protrusion of the stopper or the contact portion, the width of the adjustment amount of the elevation restriction height position can be increased.

  The stepped portions formed on the fixed member and the stopper, or the stepped portions formed on the moving member and the abutting portion are brought into contact with each other, and by changing the stepped portions, the amount of change in the protrusion amount can be set as a predetermined amount. Can be used as a guide for the amount of adjustment.

1 is a front view of a blind to which a blind lifting restriction height determining device according to the present invention is applied. (A) is a fragmentary sectional view of the raising / lowering regulation height determination apparatus based on the 1st Embodiment of this invention, (b) is a front view of a stopper. (A) is a fragmentary sectional view which shows the state which removed the stopper from the fixing member in 1st Embodiment, (b) is a front view of a stopper. (A) is the fragmentary sectional view which shows the state which changed the angle in FIG. 2 and engaged with the fixing member in 1st Embodiment, (b) is a front view of a stopper. (A) is a fragmentary sectional view which shows the state which the contact part contact | abutted to the stopper in 1st Embodiment, (b) is a front view of a stopper. It is a fragmentary sectional view of the raising / lowering regulation height determination apparatus which concerns on 2nd Embodiment. FIG. 7 is a partial cross-sectional view showing a state in which the stopper is engaged with the fixing member at a different angle from that of FIG. 6 in the second embodiment. (A) is a fragmentary sectional view of the raising / lowering regulation height determination apparatus which concerns on 3rd Embodiment, (b) is a front view of an engagement cap. (A) is a fragmentary sectional view which shows the state which removed the contact part from the moving member in 3rd Embodiment, (b) is a front view of an engagement cap. (A) is a fragmentary sectional view which shows the state which contacted the contact part in the 3rd Embodiment, changing the angle from FIG. 8, and (b) is a front view of an engagement cap. . (A) is a fragmentary sectional view which shows the state which the contact part contact | abutted in the stopper in 3rd Embodiment, (b) is a front view of an engagement cap. It is a fragmentary sectional view of the raising / lowering regulation height determination apparatus which concerns on 4th Embodiment. In 4th Embodiment, it is a fragmentary sectional view which shows the state which removed the contact part from the moving member. It is a fragmentary sectional view of the raising / lowering regulation height determination apparatus which concerns on 5th Embodiment. In 5th Embodiment, it is a fragmentary sectional view which shows the state which removed the stopper from the fixing member.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a blind to which the blind lifting restriction height determining device according to the present invention is applied can be applied to any blind that can lift and lower a shielding material suspended from a head box. This represents an example applied to a pleated screen. However, the present invention is not limited to this, and the present invention can be applied to any other type of blind such as a horizontal blind or a roman shade using a large number of slats suspended from a head box via a ladder cord as a shielding material.

  The blind 10 has a head box 12 attached to a wall surface or a ceiling surface via a bracket 11, and a rotary shaft 14 is rotatably disposed in the head box 12. One end of the rotating shaft 14 is rotatably connected to a pulley (not shown) disposed at one end of the head box 12. An operation string 15 that hangs down from the head box 12 is wound around the pulley, and the pulley can be rotated by operating the operation string 15. However, the rotational drive of the rotating shaft 14 can be an electric type, and the rotating shaft 14 can be connected to the output shaft of the electric motor.

  On the other end side of the rotating shaft 14, a winding pipe (moving member) 16 is arranged coaxially with the rotating shaft 14, so as not to rotate relative to the rotating shaft 14, and to be slidable in the axial direction. . The other end of the winding pipe 16 is screwed into one end of a screw shaft (support shaft) 18, and the other end of the screw shaft 18 cannot be rotated by a fixing member 20 provided at the other end of the head box 12. It is fixed. Upper ends of a plurality of lifting cords 22 are connected to the winding pipe 16 so as to be wound and unwound, and the lower ends of the lifting cords 22 are screens with a hook as a shielding material hanging from the head box 12. Each of the ridges 24 is inserted and connected to a bottom rail 25 disposed at the lowermost end of the screen 24.

  Based on FIG. 2 thru | or FIG. 5, the raising / lowering regulation height determination apparatus of 1st Embodiment is explained in full detail.

  On the surface of the fixing member 20 facing the winding pipe 16, an engaging recess 20a is formed coaxially with the winding pipe 16 and the screw shaft 18 and through which the screw shaft 18 penetrates. A plurality of protrusions 20b extending in the axial direction are formed on the inner peripheral surface of the inner peripheral surface at intervals in the circumferential direction.

  A stopper 26 is detachably engaged with the engaging recess 20a. The stopper 26 has a cylindrical shape as shown in FIG. 2B, and the stopper 26 has a center hole 26b through which the screw shaft 18 penetrates at the center. A protruding portion 26 a that protrudes in the direction of the take-up pipe 16 is formed on a part of the surface facing the pipe 16. In addition, a plurality of grooves 26c extending in the axial direction are formed on the outer peripheral surface of the stopper 26 at intervals in the circumferential direction.

  The stopper 26 is slidable in the axial direction with respect to the screw shaft 18 and is rotatable around the screw shaft 18. By sliding in the axial direction of the screw shaft 18, the stopper 26 can move with respect to the engagement recess 20 a. It is removable. Further, when the stopper 26 is inserted into the engaging recess 20a, the groove 26c of the stopper 26 and the protrusion 20b are fitted to each other, so that the stopper 26 is locked against the fixing member 20 and engaged. The The stopper 26 engages with the engagement recess 20a so that the engagement angle can be changed in units of angles formed by the adjacent grooves 26c. Instead of fitting between the groove 26c and the protrusion 20b, it is possible to fit between polygons.

  As shown in FIG. 2A, when the stopper 26 is completely inserted into the engaging recess 20a, only the protruding portion 26a protrudes from the end surface of the fixing member 20, and the other portions are the end surface of the fixing member 20. Configure the same plane.

  On the other hand, a part of the surface of the winding pipe 16 facing the stopper 26 is provided with a contact portion 16a protruding in the direction of the stopper 26, and the winding pipe 16 rotates in the axial direction while rotating on the screw shaft 18. By sliding, the contact part 16a contacts the protrusion part 26a of the stopper 26, and rotation and sliding of the winding pipe 16 are restrained. The winding pipe 16 rotates to wind or unwind the lifting cord 22 to lift the screen 24. However, the abutting portion 16a abuts against the protruding portion 26a of the stopper 26, and the rotation of the winding pipe 16 is restricted. At this point, the screen 24 stops moving up and down, so that the height of the screen 24 to be lifted is determined at this position. The contact between the contact portion 16a of the winding pipe 16 and the protruding portion 26a of the stopper 26 may be set either when the screen 24 is raised or lowered.

  Next, a method for determining the elevation restriction height position of the screen 24 will be described.

  First, as shown in FIG. 2A, the take-up pipe 16 is moved away from the stopper 26 in advance and moved to a position where it is easy to work.

  From this state, as shown in FIG. 3A, the stopper 26 is slid in the direction of the arrow A of the screw shaft 18 to release the engagement with the engagement recess 20 a and is removed from the fixing member 20.

  Thereafter, as shown by a two-dot chain line in FIG. 4A, the stopper 26 is rotated around the screw shaft 18 with the stopper 26 removed from the fixing member 20 (180 ° rotation in the illustrated example). The protrusion 26a is positioned differently around the screw shaft 18. 4A, the stopper 26 is slid in the axial direction of the screw shaft 18 in the direction opposite to the direction A of FIG. 3A, and is engaged with the engaging recess 20a and fixed. Attach to member 20.

  Thereafter, when the operation string 15 is operated to raise and lower the screen 24 and the pulley is rotated, as shown in FIG. 5A, the winding pipe 16 is integrated with the rotary shaft 14 in the direction of arrow B in the figure. It rotates and slides on the screw shaft 18 in the direction of arrow C while winding up or unwinding the lifting / lowering cord 22. When the abutting portion 16 a abuts on the protruding portion 26 a of the stopper 26 positioned above the screw shaft 18, the rotation of the winding pipe 16 is restricted. As described above, when the position of the protruding portion 26a of the stopper 26 is changed by 180 ° in the rotation direction of the winding pipe 16 from the position shown in FIG. 2, the position where the contact portion 16a contacts the protruding portion 26a is taken up. It is changed by a half rotation of the pipe 16. For this reason, the amount of rotation of the winding pipe 16 is increased or decreased by a half rotation, and the length of the winding pipe 16 winding or unwinding the lifting / lowering cord 22 is also changed by the half rotation of the winding pipe 16. The regulated height position is changed.

  In addition, the change of the attachment angle of the stopper 26 with respect to the fixing member 20, that is, the engagement angle is not limited to the angle at which the protruding portion 26a is changed by 180 °, and may be changed for each angle unit formed by the adjacent grooves 26c. It can be changed at any angle. As a result, the height position can be significantly changed or finely adjusted.

(Second Embodiment)
Next, based on FIG.6 and FIG.7, 2nd Embodiment is described.

  In the second embodiment, the shape of the bottom surface 20c of the engaging recess 20a of the fixing member 20 and the shape of the bottom surface 26d of the stopper 26 are different from those of the first embodiment, and other configurations are the first embodiment. Therefore, only different points will be described in detail, and description of similar parts will be omitted.

  As shown in FIG. 6, the engaging recess 20 a has a plurality of step portions formed on the bottom surface 20 c so as to change into a step shape around the screw shaft 18. It is desirable that the height of the step portion is constant. Similarly, a plurality of step portions are formed on the bottom surface 26d of the stopper 26 so as to have a shape that matches the stepped shape of the bottom surface 20c of the engaging recess 20a.

  When the stopper 26 is inserted into the engaging recess 20a so that the phase of the staircase on the bottom surface 26d of the stopper 26 and the phase of the staircase of the bottom surface 20c of the engaging recess 20a are completely matched, the stopper 26 is completely disengaged from the engaging recess 20a. It is inserted to the back, and the protruding portion 26a is the most retracted position (FIG. 6). On the contrary, when the stopper 26 is inserted into the engaging recess 20a by completely shifting the phase of the step of the bottom surface 26d of the stopper 26 and the phase of the step of the bottom surface 20c of the engaging recess 20a, the stopper 26 is moved into the engaging recess 20a. It cannot be inserted to the back, and thus the protruding portion 26a is at the maximum protruding position from the fixing member 20 (FIG. 7).

  As shown in FIG. 7, when the protruding portion 26a is in a protruding state, the winding pipe 16 is less than when the contact portion 16a and the protruding portion 20a of the winding pipe 16 are in the state of FIG. Since the contact is caused by the rotation, the elevation restriction height position of the screen 24 can be changed.

  Thus, by changing the mounting angle of the stopper 26 with respect to the fixing member 20, that is, the engagement angle, not only the circumferential position of the protruding portion 26a but also the protruding amount changes, so that it is wider than in the first embodiment. The height position can be adjusted by the width. By setting the height of the stepped portion of the staircase as a predetermined amount, the protrusion amount can be changed in units of a predetermined amount, so that the adjustment amount can be used as a guide.

  The stepped portion of the staircase is preferably formed at intervals in the circumferential direction in synchronization with the groove 26c of the stopper 26. Thus, there is a correlation between the circumferential position of the protruding portion 26a and the protruding amount. It is good to make it. By providing the correlation, the contact portion 16a of the take-up pipe 16 is adjusted to be in contact with the optimum position of the protruding portion 26a regardless of the engagement angle of the stopper 26. It is preferable.

(Third embodiment)
A third embodiment will be described with reference to FIGS. Here, only the configuration different from the first and second embodiments will be described, and the description of the same configuration will be omitted.

  A protruding portion 20 e as a stopper protruding in the direction of the winding pipe 16 is formed on a part of the surface of the fixing member 20 facing the winding pipe 16. One end of the winding pipe 16 facing the fixing member 20 is provided with an enlarged diameter portion 16b having a diameter larger than that of the other portion, and the outer peripheral surface of the enlarged diameter portion 16b extends in the axial direction. A plurality of grooves (not shown) are formed at intervals in the circumferential direction of the enlarged diameter portion 16b.

  An engagement cap 30 can be detachably engaged with the enlarged diameter portion 16b, and a contact portion 30a protruding in the direction of the fixing member 20 is formed on a surface of the engagement cap 30 facing the fixing member 20. Yes. Further, as shown in FIG. 8B, the engagement cap 30 has a center hole portion 30c through which the screw shaft 18 penetrates in the center portion, and the inner peripheral surface of the center hole portion 30c has a center direction. A plurality of protruding ridges 30b extending in the axial direction are formed at intervals in the circumferential direction, and are fitted into the grooves of the diameter-enlarged portion 16b of the winding pipe 16.

  The engagement cap 30 is slidable in the axial direction with respect to the screw shaft 18 and is rotatable around the screw shaft 18. By sliding in the axial direction of the screw shaft 18, the engagement cap 30 is formed on the enlarged diameter portion 16 b. On the other hand, it is removable. The engagement cap 30 engages with the enlarged diameter portion 16b of the winding pipe 16 so that the engagement angle can be changed in units of an angle formed by the adjacent protrusions 30b.

  In this example, the projecting portion 20e is directly formed on the fixing member 20, but a configuration using the fixing member 20 and the stopper 26 may be used as in the first and second embodiments. Moreover, it can also be set as the fitting of polygons instead of making it the fitting of the protrusion 30b and a groove | channel.

  Next, a method for determining the elevation restriction height position in the third embodiment will be described.

  First, as shown in FIG. 8, the winding pipe 16 is moved away from the fixing member 20 to a position where it can be easily operated.

  From this state, the engagement cap 30 is slid in the direction of arrow D in FIG. 9 of the screw shaft 18 to release the engagement with the enlarged diameter portion 16b of the take-up pipe 16 and remove from the enlarged diameter portion 16b.

  Thereafter, as shown by a two-dot chain line in FIG. 10A, the engagement cap 30 is rotated around the screw shaft 18 with the engagement cap 30 removed from the enlarged diameter portion 16b (not shown). In the example, the contact portion 30a is rotated by 180 °, and the position of the contact portion 30a is set to a different position around the screw shaft 18. Then, as shown by the solid line in FIG. 10 (a), the engagement cap 30 is slid in the axial direction of the screw shaft 18 in the direction opposite to the direction D in FIG. 9, and engaged with the enlarged diameter portion 16b. Attach to pipe 16.

  Thereafter, when the operating string 15 is operated to raise and lower the screen 24 and the pulley is rotated, as shown in FIG. 11A, the winding pipe 16 is integrated with the rotary shaft 14 in the direction of arrow E in the figure. While rotating and winding up or unwinding the lifting / lowering cord 22, it slides on the screw shaft 18 in the direction of arrow F in the figure. When the abutting portion 30a abuts on the protruding portion 20e located below the screw shaft 18, the rotation of the winding pipe 16 is restricted. Thus, the position where the contact portion 30a contacts the protruding portion 20e by changing the position of the contact portion 30a of the engagement cap 30 from the position shown in FIG. 8 by 180 ° in the rotation direction of the winding pipe 16. Is changed by a half rotation of the winding pipe 16. For this reason, the amount of rotation of the winding pipe 16 is increased or decreased by a half rotation, and the length of the winding pipe 16 winding or unwinding the lifting / lowering cord 22 is also changed by the half rotation of the winding pipe 16. The regulated height position is changed.

  In addition, the change of the attachment angle of the engagement cap 30 with respect to the winding pipe 16, that is, the change of the engagement angle is not limited to the angle at which the contact portion 30a is changed by 180 °, but the adjacent protrusions 30b are formed. The angle unit can be changed at any angle as long as the angle unit is set, so that the height position can be significantly changed or finely adjusted.

  Further, on the contact surface between the enlarged diameter portion 16b of the winding pipe 16 and the engagement cap 30 in the present embodiment, a plurality of step portions are formed so as to change in the same step shape as in the second embodiment, The increase / decrease width of the protruding amount of the engagement cap 30 from the enlarged diameter portion 16b can be increased.

(Fourth embodiment)
Next, based on FIG.12 and FIG.13, 4th Embodiment is described. Here, only the configuration different from the third embodiment will be described, and the description of the same configuration as the third embodiment will be omitted.

  As shown in FIG. 12 (a), the enlarged diameter portion 16b of the take-up pipe 16 has a central direction of the enlarged diameter portion 16b at an arbitrary position in the circumferential direction instead of the groove of the third embodiment. One screw hole 16c is formed toward the end. Further, in the side wall of the engagement cap 30, a plurality of holes 30d extending in the center direction at equal intervals in the circumferential direction are penetrating in place of the protrusions 30b of the third embodiment. By engaging the engagement cap 30 with the enlarged diameter portion 16b and rotating the engagement cap 30, the position of any hole 30d can coincide with the position of the screw hole 16c of the enlarged diameter portion 16b. Are arranged as shown. The engagement cap 30 and the enlarged diameter portion 16b are connected by screwing the hole 30d and the screw hole 16c with screws 32 from the outside of the engagement cap 30.

  Next, a method for determining the elevation restriction height position in the fourth embodiment will be described.

  As shown in FIG. 12 (a), the engagement cap 30 is normally fixed to the enlarged diameter portion 16b of the take-up pipe 16 with screws 32, so that the elevation restriction height position is changed. As shown in FIG. 13A, first, the screw 32 is removed, and the engagement cap 30 is slid in the direction of arrow G in FIG. Remove from the part 16b. Thereafter, the engagement cap 30 is rotated around the screw shaft 18 until the contact portion 30a is positioned at a desired angular position, and the engagement cap 30 is slid in the axial direction of the screw shaft 18 again. As shown in FIG. 12A, the winding pipe 16 is engaged with the enlarged diameter portion 16b. At this time, if the position of the hole 30d of the engagement cap 30 and the position of the screw hole 16c of the enlarged diameter portion 16b are shifted, the position is matched by slightly rotating the engagement cap 30, and the screw 32 is engaged. The engagement cap 30 is connected to the take-up pipe 16 by being inserted into the hole 30 d of the cap 30 and screwed into the screw hole 16 c of the enlarged diameter portion 16 b. Thereby, since the rotation angle of the winding pipe 16 is changed by the changed angle of the contact part 30a, the elevation restriction height position of the screen 24 can be changed.

  After removing the screw 32, the engagement cap 30 is removed from the enlarged diameter portion 16b of the take-up pipe 16, and the engagement cap 30 is rotated around the screw shaft 18 to adjust the angular position of the contact portion 30a. Alternatively, the angular position of the contact portion 30a may be adjusted by rotating the engagement cap 30 while the engagement cap 30 remains engaged without being removed from the enlarged diameter portion 16b.

  Further, the engagement between the stopper 26 and the fixing member 20 in the first or second embodiment can be configured similarly to this embodiment. For example, a plurality of screw holes are formed in the stopper 26, It is also possible to form holes in the fixing member 20, align the positions of the holes and the screw holes, and fix them with screws.

(Fifth embodiment)
Next, based on FIG.14 and FIG.15, 5th Embodiment is described. Here, only the configuration different from the first and second embodiments will be described, and the description of the same configuration will be omitted.

  As shown in FIG. 14, the engaging recess 20a of the fixing member 20 penetrates in the axial direction, and the stopper 26 is inserted into the engaging recess 20a. Both end portions of the stopper 26 in the axial direction protrude from the fixing member 20 to the outside, and one end portion facing the winding pipe 16 has the same shape as the first and second embodiments, and the protruding portion 26a. Is protruding. On the other hand, the other end portion of the stopper 26 is provided with a flange portion 26e whose diameter is larger than that of the engaging recess 20a of the fixing member 20, and this flange portion 26e abuts against the end surface of the fixing member 20 and further beyond that of the stopper 26. Insertion into the engagement recess 20a is restricted. Since the center hole portion 26b of the stopper 26 is formed over the entire length in the axial direction of the stopper 26, the end portion of the screw shaft 18 is disposed in the center hole portion 26b so as not to be relatively rotatable. Further, the end cover 12a of the head box 12 is easily detachable.

  Next, a method for determining the elevation restriction height position in the fifth embodiment will be described.

  When changing the elevation restriction height position from the state shown in FIG. 14, as shown in FIG. 15, first, the end cover 12a is removed from the head box 12 in the direction of arrow H in FIG. Open the part. Next, the stopper 26 is pulled out in the direction of arrow J in FIG. 15 from the opened end of the head box 12, and the stopper 26 is taken out from the fixing member 20 to the outside of the head box 12. Thereafter, the stopper 26 is rotated so that the protruding portion 26 a is at a desired angular position, and the stopper 26 is inserted again into the engaging recess 20 a of the fixing member 20 from the end of the head box 12. At this time, the screw shaft 18 is inserted into the central hole portion 26b of the stopper 26, and the insertion is performed by inserting the flange portion 26e of the stopper 26 to a position where it abuts against the end surface of the fixing member 20, as shown in FIG. Ends. Thereafter, the end cover 12a is mounted again on the end of the head box 12, and the operation is completed. Thereby, since the rotation angle of the winding pipe 16 is changed by the changed angle of the protruding portion 26a, the elevation restriction height position of the screen 24 can be changed.

  Thereby, since adjustment can be performed from the side of the head box 12, the adjustment can be facilitated.

  In the first to fifth embodiments, the winding pipe 16 in which the lifting / lowering cord is connected so as to be wound and unwound is used as the moving member of the lifting / lowering regulating height determining device for the screen 24. However, the present invention is not limited to this, and is different from a winding drum in which a lifting / lowering cord is connected so as to be wound and unwound when the screen 24 is lifted / lowered. Alternatively, the moving piece may be provided with a contact portion and moved on the screw shaft 18 in the axial direction.

12 Head box 16 Winding pipe (moving member)
16a Contact part 18 Screw shaft (support shaft)
20 fixing member 20c bottom surface (stepped portion)
20e Protruding part (stopper)
24 screen (shielding material)
26 Stopper 26d Bottom (step)
30a Contact part

Claims (8)

The support shaft (18) disposed in the head box (12) and the support shaft (18) can be moved in the axial direction while rotating as the shielding material (24) is raised and lowered, and a contact portion ( When the moving member (16) having 16a) and the shielding member (24) reach the elevation restriction height position, the abutting portion of the moving member (16) moving in the axial direction on the support shaft (18) ( 16a) a stopper (26),
The stopper (26) is detachable and engageable at a plurality of positions with respect to the fixing member (20) disposed in the head box (12), and the stopper (26) with respect to the fixing member (20). By adjusting the engagement position, the contact position between the moving member (16) and the stopper (26) is changed, and the elevation restriction height position can be adjusted. Determining device.   The blind according to claim 1, characterized in that the angle of the stopper around the rotation direction of the moving member (16) is changed by changing the engagement position of the stopper (26) with the fixing member (20). Elevating regulation height determining device.   The protrusion amount of the stopper (26) protruding from the fixing member (20) is changed by changing the engagement position of the stopper (26) with respect to the fixing member (20). The blind lifting height determining device according to 2.   A plurality of step portions (20c, 26d) are formed on the contact surfaces of the fixing member (20) and the stopper (26), and the step portions that come into contact with each other by changing the engagement angle of the stopper with the fixing member. The raising and lowering of the blind according to any one of claims 1 to 3, wherein the amount of protrusion of the stopper (26) from the fixing member (20) is changed by changing between (20c, 26d). Regulatory height determination device. The support shaft disposed in the head box (12) and the support shaft (18) can be moved in the axial direction while rotating as the shielding material (24) is moved up and down, and the contact portion (30a) can be moved. When the movable member (16) and the shielding member (24) reach the elevation restriction height position, the contact portion (30a) of the movable member (16) moving in the axial direction on the support shaft (18). A stopper (20e) that abuts,
The contact portion (30a) is detachable with respect to the moving member (16) and can be engaged at a plurality of positions, and the engagement position of the contact portion (30a) with respect to the moving member (16) is adjusted. By doing so, the position of contact between the moving member (16) and the stopper (20e) is changed so that the height regulation height position can be adjusted.   The angle of the contact portion (30a) around the rotation direction of the moving member (16) is changed by changing the engagement position of the contact portion (30a) with the moving member (16). The apparatus for determining a height of a blind as recited in claim 5.   The amount of protrusion of the contact portion (30a) protruding from the moving member (16) is changed by changing the engagement position of the contact portion (30a) with respect to the moving member (16). The blind lifting height determining apparatus according to claim 5 or 6.   A plurality of step portions are formed on the mutual contact surfaces of the moving member (16) and the contact portion (30a), and the step portions that come into contact with each other by changing the engagement angle of the contact portion with the moving member. The blind lifting restriction height determining apparatus according to claim 5, wherein the protrusion amount of the abutting portion from the moving member is changed instead.

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