Shielding device

Abstract

To provide a shielding device configured to suppress the positional deviation on an operation part side.SOLUTION: A roll screen 10 arranged in a stretched state in an opening 1 includes: an operation unit 14 provided at one end in a longitudinal direction of a winding pipe 13, the operation unit 14 having a pulley 16 for rotating the winding pipe 13 and an operation cord 17 suspended from the pulley 16; and a fixing unit 15 provided at the other end of the winding pipe 13, in which the operation unit 14 is a part of a bracing mechanism for bracing the winding pipe 13 within the opening 1 and has an operation side pressing member for pressing a first vertical wall 2; the fixed unit 15 is a part of the bracing mechanism and has a fixed-side pressing member that presses a second vertical wall 3; and the fixed unit provided with an operation-side auxiliary plate 21 disposed on the first vertical wall 2 and having an engagement piece engageable with the pulley 16 when the operation-side pressing member moves in the pulling direction of the operation cord 17.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a shielding device that opens and closes a shielding material by rotating a pulley with an operating cord. [Background technology]

[0002] For example, as shown in Patent Document 1, some shading devices such as roller blinds and blinds are attached between a pair of opposing vertical walls that form an opening such as a window, using the function of a tension rod. Some shading devices raise and lower the shading material such as the blind or screen by pulling an operating cord that hangs down from an operating part provided at one end in the longitudinal direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5667839 Summary of the Invention [Problem to be solved by the invention]

[0004] The shielding device is attached between a pair of opposing vertical walls using the function of a tension rod, and a load is applied in the tensile direction to the operating section from which the operating cord hangs. When the operating cord is repeatedly pulled normally, or when the operating cord is pulled too hard by mistake, the operating section may shift from its fixed position. [Means for solving the problem]

[0005] A shading device that solves the above problem is a shading device that opens and closes an opening with a shielding material that is arranged in a tensioned state between opposing first and second vertical walls that form the opening, the shading device comprising: a moving part that moves the shielding material to open and close the opening; an operation unit provided at one longitudinal end of the moving part, the operation unit comprising a pulley that rotates a member that moves the shielding material, and an operation cord that hangs down from the pulley and rotates the pulley; and a fixed unit provided at the other longitudinal end of the moving part, the operation unit being part of a tension mechanism that tensions the moving part between the first and second vertical walls and comprising an operation side pressing member that presses the first vertical wall, the fixed unit being part of the tension mechanism and comprising a fixed side pressing member that presses the second vertical wall, and further comprising an auxiliary plate that is arranged on the first vertical wall, the auxiliary plate comprising an engagement piece that can engage with the pulley when the operation side pressing member moves in the pulling direction of the operation cord.

[0006] A shielding device that solves the above problem is a shielding device that opens and closes an opening with a shielding material, the shielding device being disposed in a state of being stretched between a first vertical wall and a second vertical wall that are opposed to each other and that form the opening, the shielding device comprising: a moving part that moves the shielding material to open and close the opening; an operation unit provided at one end of the moving part in the longitudinal direction, the operation unit including a pulley that rotates a member that moves the shielding material, and an operation cord that hangs down from the pulley and rotates the pulley; and a fixed unit provided at the other end of the moving part in the longitudinal direction, The knit is part of a tensioning mechanism that tensions the moving part between the first vertical wall and the second vertical wall and includes an operating side pressing member that presses the first vertical wall, and the fixed unit is part of the tensioning mechanism that includes a fixed side pressing member that presses the second vertical wall, and further includes an auxiliary plate that is arranged on the first vertical wall, and the auxiliary plate includes a load support portion, and the load support portion supports the load through the operation unit when the operating side pressing member moves in a pulling direction and comes into contact with any position of the operation unit. Effect of the Invention

[0007] According to the present invention, positional deviation on the operation unit side is suppressed. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing an installed state of a roller blind in an embodiment. [Diagram 2] FIG. 2 is a perspective view of an operation unit of the roller blind in the embodiment. [Diagram 3] FIG. 3 is a perspective view of a fixing unit of a roller blind in the embodiment. [Figure 4] FIG. 4 is a perspective view of an operation side auxiliary plate in the embodiment. [Diagram 5] FIG. 5 is a perspective view of a fixed side auxiliary plate in the embodiment. [Figure 6] FIG. 6 is a perspective view of a main part showing a state in which the fixing unit side of the roller blind is attached in the embodiment. [Figure 7] FIG. 7 is a perspective view of a main part showing a state in which an operation side auxiliary plate is attached to the operation unit side in the embodiment. [Figure 8] FIG. 8 is a front view showing a mounting state of the operation side auxiliary plate in the embodiment. [Figure 9] FIG. 9 is a side view showing a mounting state of the operation side auxiliary plate in the embodiment. [Figure 10] FIG. 10 is a side view showing a mounting state of the fixed side auxiliary plate in the embodiment. [Figure 11] FIG. 11 is a side view showing a state in which the operating side auxiliary plate and the operating side pressing member are separated from each other in the embodiment. [Figure 12] FIG. 12 is a side view showing a state in which the operating side auxiliary plate receives the load of the operating side pressing member in the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a partition to which the present invention is applied will be described with reference to the drawings. [First embodiment] [Overall structure] As shown in Fig. 1, the roller blind 10 is a shielding device placed in an opening 1 such as a window or an entrance to a staircase. The opening 1 comprises a pair of opposing first and second vertical walls 2 and 3, and an upper wall 4 connecting the first and second vertical walls 2 and 3 at their upper parts. The roller blind 10 is installed between the first and second vertical walls 2 and 3, close to the upper wall 4, by using the function of a tension rod.

[0010] The roller blind 10 is provided with a moving section 11. The moving section 11 is provided with a winding pipe 13 as an axis around which the screen 12 that opens and closes the opening 1 is wound to move. The winding pipe 13 is a section that raises and lowers the screen 12. The upper end of the screen 12 is fixed to the winding pipe 13, and the screen 12 is wound. A bottom bar 12a is disposed at the lower end of the screen 12. The winding pipe 13 extends in the width direction of the roller blind 10, and one end in the longitudinal direction is provided with an operation unit 14, and the other end in the longitudinal direction is provided with a fixing unit 15.

[0011] [Operation unit] As shown in FIG. 2, the operation unit 14 includes an operation side connecting shaft 14a that is fitted to one end of the winding pipe 13. The operation side connecting shaft 14a is fitted to one end of the winding pipe 13 and rotates integrally with the winding pipe 13. A pulley 16 is attached to the operation side connecting shaft 14a. The pulley 16 rotates the operation side connecting shaft 14a. An operation cord 17 is hung on the outer periphery of the pulley 16. As an example, the operation cord 17 is a ball chain. The pulley 16 is provided with a plurality of recesses 16a on the outer periphery with which the balls of the ball chain engage. The operation cord 17 hung on the pulley 16 hangs down, and a first portion 17a and a second portion 17b are connected at the bottom. 1, the pulley 16 and the take-up pipe 13 rotate in one direction, winding the screen 12 onto the take-up pipe 13 and lifting the bottom bar 12a. When the second portion 17b is pulled in the direction of the arrow X, the pulley 16 and the take-up pipe 13 rotate in the other direction, unwinding the screen 12 from the take-up pipe 13 and lowering the bottom bar 12a.

[0012] A pulley cover 16b is disposed on the outer periphery of the pulley 16 to prevent the operating cord 17 from falling off the pulley 16. The pulley cover 16b covers the upper and sides of the pulley 16, and the lower part is open to allow the first part 17a and the second part 17b of the operating cord 17 to hang down. The pulley cover 16b is loosely fitted to the pulley 16 so as to have a play that allows it to rotate in the circumferential direction. The first part 17a and the second part 17b are sometimes pulled straight down and sometimes pulled diagonally from the front. When the pulley cover 16b is pulled diagonally from the front, it rotates slightly in the circumferential direction accordingly.

[0013] Furthermore, the operation unit 14 includes an operation side pressing member 18. The operation side pressing member 18 includes an operation side pressing plate 18a that is pressed against the first vertical wall 2. The operation side pressing member 18 also rotatably supports the operation side connecting shaft 14a and the pulley 16 that are fitted to one end of the winding pipe 13. Therefore, the operation side pressing member 18 does not rotate while pressing the first vertical wall 2. Then, the operation side connecting shaft 14a and the winding pipe 13 rotate relative to the operation side pressing member 18 according to the rotation direction of the pulley 16.

[0014] The operation side pressure plate 18a presses against the first vertical wall 2. The operation side pressure plate 18a has a rectangular basic shape with an arc-shaped lower edge. That is, the operation side pressure plate 18a has an upper edge that is an operation side straight portion 18b and a lower edge that is an operation side arc portion 18c. The operation side pressure plate 18a has an operation side anti-slip member 18d disposed on the surface that contacts the first vertical wall 2.

[0015] [Fixed unit] As shown in FIG. 3, the fixed unit 15 includes a fixed-side connecting shaft portion 15a that is fitted to the other end of the winding pipe 13. The fixed-side connecting shaft portion 15a is fitted to the other end of the winding pipe 13 and rotates integrally with the winding pipe 13. The fixed unit 15 further includes a fixed-side pressing member 19 and an adjustment dial 20. The fixed-side pressing member 19 includes a fixed-side pressing plate 19a. The fixed-side pressing plate 19a is pressed against the second vertical wall 3. The fixed-side pressing plate 19a has a rectangular basic shape and a circular arc shape at its lower edge. That is, the fixed-side pressing plate 19a has an upper edge that is a fixed-side straight portion 19b and a lower edge that is a fixed-side circular arc portion 19c. The fixed-side pressing plate 19a has a fixed-side anti-slip member 19d on the surface that contacts the second vertical wall 3.

[0016] The fixed-side pressing member 19 rotatably supports an adjustment dial 20. The adjustment dial 20 is located between the fixed-side pressing plate 19a and the vertical edge of the screen 12. Furthermore, the adjustment dial 20 rotatably supports the fixed-side connecting shaft 15a. Therefore, the fixed-side pressing member 19 does not rotate while being pressed against the second vertical wall 3, and the fixed-side connecting shaft 15a and the winding pipe 13 rotate relative to the fixed-side pressing member 19.

[0017] An elastic body such as a coil spring is disposed inside the fixed-side connecting shaft portion 15a, and the elastic body biases the fixed-side pressing plate 19a in a direction away from the fixed-side connecting shaft portion 15a. When the adjustment dial 20 rotates in one direction, the fixed-side pressing plate 19a moves toward the second vertical wall 3. The moving portion 11 is fixed between the first vertical wall 2 and the second vertical wall 3 by a repulsive force, i.e., a tension force, generated when the elastic body contracts. The adjustment dial 20 is a member that adjusts the tension force. The tension mechanism is composed of an operating-side pressing member 18, a fixed-side pressing member 19, the adjustment dial 20, an elastic body, etc.

[0018] In each of the operating-side pressing member 18 and the fixed-side pressing member 19, the operating-side straight portion 18b and the fixed-side straight portion 19b are the same height and are abutment edges that abut against the upper wall 4. Each of the operating-side straight portion 18b and the fixed-side straight portion 19b abuts against the upper wall 4, thereby determining the height position of the moving portion 11 from the upper wall 4.

[0019] [Auxiliary plate] In the roller blind 10, an operation side auxiliary plate 21 serving as a first auxiliary plate is disposed on the operation unit 14 side. A fixed side auxiliary plate 31 serving as a second auxiliary plate is disposed on the fixed unit 15 side. Both the operation side auxiliary plate 21 and the fixed side auxiliary plate 31 are plates for preventing the moving part 11 from shifting downward between the first vertical wall 2 and the second vertical wall 3.

[0020] ·Operation side auxiliary plate As shown in Fig. 4, the operating side auxiliary plate 21 has a basic rectangular plate shape, and is provided with an operating side plate opening 22 extending downward from an operating side plate upper end 23 to allow clearance for the operating side pressing plate 18a. The operating side plate upper end 23 is an abutting portion that abuts against the upper wall 4. The operating side plate opening 22 has a pair of operating side opening straight portions 22a that extend downward from the operating side plate upper end 23 as an opening end, and an operating side opening arc portion 22b that serves as a bottom portion connecting the pair of operating side opening straight portions 22a at the bottom. The width between the pair of operating side opening straight portions 22a and the operating side opening arc portion 22b correspond to the shape of the operating side pressing member 18.

[0021] The operating side auxiliary plate 21 has an operating side flat plate portion 24 below the operating side plate opening 22. An engagement piece 25 is provided on the surface of the operating side flat plate portion 24 opposite to the first vertical wall 2, i.e., on the surface on the pulley 16 side. The engagement piece 25 is located below the apex of the operating side opening arc portion 22b. The engagement piece 25 has an L-shape. Specifically, the engagement piece 25 has a base portion 25a that is erected perpendicular to the operating side flat plate portion 24 and a protrusion 25b that protrudes in the direction of the operating side plate opening 22. The protrusion 25b is engageable with a recess 16a provided on the outer periphery of the pulley 16.

[0022] In the operation side flat plate portion 24, a boss-shaped protrusion 26 is erected on the surface on which the engagement piece 25 is provided. In this embodiment, a pair of protrusions 26 is provided. The pair of protrusions 26 is disposed between the operation side opening straight portion 22a and the vertical side edge of the operation side flat plate portion 24. In addition, in the up-down direction, the pair of protrusions 26 is located between the bottom point of the operation side opening arc portion 22b and the protrusion 25b. When the pulley 16 is positioned in the operation side plate opening 22, the pulley cover 16b is located between the pair of protrusions 26, and may rattle in the circumferential direction according to the rotation of the pulley 16. Even in such a case, the pulley cover 16b abuts against the pair of protrusions 26, thereby controlling the rattle. As a result, the pulley cover 16b prevents the first part 17a and the second part 17b of the hanging operation cord 17 from contacting the engagement piece 25 due to the rattle. In addition, it is possible to prevent the generation of abnormal noise caused by contact between the engaging piece 25 and the first portion 17a and the second portion 17b which are being pulled and moving.

[0023] Furthermore, the operation side flat plate portion 24 is provided with operation side fixing holes 27 for fixing the operation side auxiliary plate 21 with screws or the like. In this embodiment, a pair of operation side fixing holes 27 are provided and are located below the operation side flat plate portion 24 and between the engagement piece 25 and the protrusion 26. Furthermore, in the operation side flat plate portion 24, a rectangular operation side plate rib 28 that defines an area for attaching double-sided tape is provided on the surface that faces the first vertical wall 2.

[0024] Fixed side auxiliary plate 5, the fixed-side auxiliary plate 31 also has a basic rectangular plate shape, and is provided with a fixed-side plate opening 32 extending downward from the upper end to allow clearance for the fixed-side pressing plate 19a. The fixed-side plate upper end 33 is an abutting portion that abuts against the upper wall 4. The fixed-side plate opening 32 has a pair of fixed-side opening straight portions 32a extending downward from the fixed-side plate upper end 33 as an opening end, and a fixed-side opening arc portion 32b below that serves as a bottom portion connecting the pair of fixed-side opening straight portions 32a. The width between the pair of fixed-side opening straight portions 32a and the fixed-side opening arc portion 32b correspond to the shape of the fixed-side pressing member 19.

[0025] The fixed-side auxiliary plate 31 has a fixed-side flat plate portion 34 below the fixed-side plate opening 32. The fixed-side flat plate portion 34 has fixed-side fixing holes 37 for fixing the fixed-side auxiliary plate 31 with screws or the like. In this embodiment, a pair of fixed-side fixing holes 37 are provided and are located below the fixed-side flat plate portion 34. A rectangular fixed-side plate rib 38 that defines an area for attaching double-sided tape is provided on the surface of the fixed-side flat plate portion 34 that faces the second vertical wall 3.

[0026] [How to install roller blinds] As shown in FIG. 6, the roller blind 10 is held with both hands and the fixed unit 15 is pushed against the upper wall 4. At this time, the fixed side pressing member 19 has the fixed side straight portion 19b abutted against the upper wall 4. Next, the operation unit 14 is pressed against the upper wall 4. The operation side pressing member 18 has the operation side straight portion 18b abutted against the upper wall 4. As a result, the roller blind 10 is provisionally fixed between the first vertical wall 2 and the second vertical wall 3. Then, the mounting position of the roller blind 10 is finely adjusted in the up-down and front-rear directions. Then, the fixed side auxiliary plate 31 is attached to the fixed unit 15 side. Specifically, the fixed side auxiliary plate 31 is moved until the fixed side plate upper end 33 abuts against the upper wall 4.

[0027] After that, as shown by the arrow D1 in Fig. 6, the adjustment dial 20 is rotated in one direction until it becomes rigid. This causes the fixed-side pressing member 19 to move toward the second vertical wall 3. Then, the operating-side pressing plate 18a presses the first vertical wall 2, and the fixed-side pressing plate 19a presses the second vertical wall 3. Thus, the roller blind 10 is attached in a state where it is stretched between the first vertical wall 2 and the second vertical wall 3, and in a state where it is parallel to the upper wall 4.

[0028] Next, an operation side auxiliary plate 21 is attached to the operation unit 14 side. Specifically, as shown in Fig. 7, the operating side auxiliary plate 21, with the operating side plate upper end 23 facing upward, is moved in the direction of arrow D2 in Fig. 7 along the first vertical wall 2 to position the operating side pressing member 18 in the operating side plate opening 22. Here, the operating side auxiliary plate 21 is moved until the operating side plate upper end 23 abuts against the upper wall 4. At this position, the operating side auxiliary plate 21 is fixed with screws through the operating side fixing holes 27 and / or with double-sided tape arranged in an area defined by the operating side plate ribs 28.

[0029] As shown in Figs. 8, 9 and 11, a gap 41 is formed between the operating side opening arc portion 22b and the operating side arc portion 18c. The protrusion 25b of the engagement piece 25 is spaced apart from the pulley 16 facing through the opening of the pulley cover 16b. That is, although the protrusion 25b is located below the recess 16a of the pulley 16, it is spaced apart from the recess 16a and is not engaged with the recess 16a. In other words, no load is applied to the operating side auxiliary plate 21 from the operating side pressing member 18. That is, the pulley 16 can rotate when the operating cord 17 is pulled in a normal operation. The first portion 17a and the second portion 17b of the operating cord 17 extend on both sides of the engagement piece 25.

[0030] As shown in FIG. 10, the fixed side auxiliary plate 31 is also moved along the second vertical wall 3 with the fixed side plate upper end 33 facing upward, and the fixed side pressing member 19 is positioned in the fixed side plate opening 32. Here, the fixed side auxiliary plate 31 is moved until the fixed side plate upper end 33 abuts against the upper wall 4. At this position, the fixed side auxiliary plate 31 is fixed with a screw through the fixed side fixing hole 37, and / or with a double-sided tape arranged in an area partitioned by the fixed side plate rib 38. At this time, the fixed side opening circular arc portion 32b and the fixed side circular arc portion 19c fit together without any gap. The fixed side auxiliary plate 31 is arranged between the second vertical wall 3 and the adjustment dial 20.

[0031] [How to use] When the first portion 17a of the operating cord 17 of the roller blind 10 attached to the opening 1 as described above is pulled downward, the pulley 16 rotates in one direction, winding the screen 12 onto the winding pipe 13 and lifting the bottom bar 12a. When the second portion 17b is pulled, the pulley 16 and the winding pipe 13 rotate in the other direction, unwinding the screen 12 from the winding pipe 13 and lowering the bottom bar 12a.

[0032] During such an operation, pulley cover 16b swings in the direction of rotation of pulley 16, which rotates as first portion 17a and second portion 17b are pulled. Even in such a case, pulley cover 16b abuts against pair of protrusions 26, thereby restricting rattling. This prevents first portion 17a and second portion 17b of operating cord 17 hanging down from pulley cover 16b from contacting engagement piece 25 due to rattling of pulley cover 16b. This also makes it possible to suppress the generation of abnormal noise caused by contact between first portion 17a and second portion 17b and engagement piece 25.

[0033] In this way, even in normal use, the roller blind 10 is subjected to a downward pulling force, which is the pulling direction, through the operation cord 17 on the operation unit 14 side. Therefore, over a long period of use, there is a risk that the operation unit 14 side will gradually shift downward. Also, if a foot gets caught on the operation cord 17, a large pulling force that exceeds the pulling force in normal use, i.e., exceeds the load capacity, may be applied. In such a case, there is also a risk that the operation unit 14 side will shift downward.

[0034] When the operating side pressing member 18 is displaced downward by the tensile force, the gap 41 between the operating side opening arc portion 22b and the operating side arc portion 18c becomes smaller. As this state progresses and the gap 41 disappears, the protrusion 25b of the engagement piece 25 engages with the recess 16a of the pulley 16, preventing the rotation of the pulley 16. When one end of the moving part 11 is displaced, it is in a state where it is likely to fall off the opening 1. When the rotation of the pulley 16 is prevented, the roller blind 10 can recognize an abnormality in the roller blind 10. Then, the user can correct the inclination of the roller blind 10 by inspecting the roller blind 10.

[0035] As shown in FIG. 12, the force that tends to further shift the roller blind 10 downward from this state is such that, on the operation unit 14 side, the projection 25b of the engagement piece 25 engages with the recess 16a of the pulley 16, and the operation side arc portion 18c comes into contact with the operation side opening arc portion 22b. As a result, the fixed side opening arc portion 32b receives the load from the fixed side arc portion 19c, and the engagement piece 25 receives the load from the pulley 16. In this respect, the operation side opening arc portion 22b and the engagement piece 25 function as a load support portion that receives the load through the operation unit 14. On the fixed unit 15 side, the fixed side arc portion 19c comes into contact with the fixed side opening arc portion 32b, so that the fixed side auxiliary plate 31 fixed to the second vertical wall 3 receives the load. In this respect, the fixed side arc portion 19c functions as a load support portion that receives the load through the fixed unit 15. As a result, the roller blind 10 is prevented from falling off the opening 1.

[0036] [Effects of the first embodiment] The above-described embodiment can provide the following advantages. (1) When the operating side pressing member 18 of the roller blind 10 is displaced downward by the tensile force, the gap 41 between the operating side opening arc portion 22b and the operating side arc portion 18c becomes smaller. Then, the protrusion 25b of the engagement piece 25 engages with the recess 16a of the pulley 16, preventing the pulley 16 from rotating. This allows the user to notice an abnormality in the roller blind 10 and correct the inclination of the roller blind 10 by inspecting it.

[0037] (2) The operation-side auxiliary plate 21 is provided with an operation-side plate opening 22 through which the operation-side pressure plate 18a escapes. That is, the operation-side pressure plate 18a is positioned within the operation-side plate opening 22. Therefore, the gap between the first vertical wall 2 and the vertical edge of the screen 12 can be narrowed.

[0038] (3) The fixed-side pressing member 19 has its upper edge, the fixed-side straight portion 19b, abutted against the upper wall 4. The operating-side pressing member 18 also has its upper edge, the operating-side straight portion 18b, abutted against the upper wall 4. This allows the distances of the moving portion 11 from the upper wall 4 to be uniform on the left and right.

[0039] Then, the operating side auxiliary plate 21 is moved until the operating side plate upper end 23 abuts against the upper wall 4. This allows the operating side auxiliary plate 21 to be fixed to the first vertical wall 2 such that a gap 41 is formed between the operating side opening arc portion 22b and the operating side arc portion 18c. Also, the fixed side auxiliary plate 31 can be fitted with the fixed side opening arc portion 32b and the fixed side arc portion 19c without any gap.

[0040] (4) During operation, the first portion 17a and the second portion 17b are pulled, causing the pulley cover 16b to swing in the direction of rotation of the rotating pulley 16. Even in such a case, the pulley cover 16b is prevented from rattling by abutting against the pair of protrusions 26. This prevents the first portion 17a and the second portion 17b of the operating cord 17 from contacting the engaging piece 25 while moving due to being pulled. This makes it possible to suppress the generation of abnormal noise caused by contact between the first portion 17a and the second portion 17b and the engaging piece 25 while moving.

[0041] (5) The fixed-side auxiliary plate 31 has the fixed-side pressure plate 19a positioned within the fixed-side plate opening 32. That is, the fixed-side auxiliary plate 31 is disposed between the second vertical wall 3 and the adjustment dial 20. Therefore, the gap between the second vertical wall 3 and the vertical edge of the screen 12 can be narrowed. In addition, even when the fixed-side auxiliary plate 31 is fixed to the second vertical wall 3, the adjustment dial 20 can be rotated. Therefore, the roller blind 10 can be removed from the opening 1.

[0042] [Modifications] The above embodiment can be further modified as follows.

[0043] In this embodiment, the fixed side auxiliary plate 31 may be omitted. This is because the fixed unit 15 side is less susceptible to the pulling force of the operating cord 17 and is less likely to shift downward.

[0044] The operation side pressing member 18 may be attached so that the operation side straight portion 18b at the upper edge does not abut against the upper wall 4. Also, the operating side pressing member 18 may be attached so that the operating side straight portion 18b of the upper edge abuts against the upper wall 4, and the vertical dimension of the operating side auxiliary plate 21 may be reduced so that the operating side plate upper end 23 does not abut against the upper wall 4. In this case, the operating side auxiliary plate 21 is attached to the first vertical wall 2 with its position adjusted so that a gap 41 is formed between the operating side opening arc portion 22b and the operating side arc portion 18c.

[0045] The operating side auxiliary plate 21 may be configured only with the operating side flat plate portion 24 provided with the engagement piece 25, omitting the operating side plate opening 22. If the engaging piece 25 is provided, when the operating unit 14 is shifted downward, the engaging piece 25 engages with the recess 16a of the pulley 16, thereby limiting the rotation of the pulley 16. In this case, the upper edge of the operating side flat plate portion 24 may be positioned so as to be separated from the operating side arc portion 18c.

[0046] The fixed-side auxiliary plate 31 may also be provided without the fixed-side plate opening 32. In this case, the fixed-side flat portion 34 may be disposed so that the upper edge of the fixed-side flat portion 34 comes into contact with the fixed-side arcuate portion 19c. The operating side pressure plate 18a may be a rectangular plate as a whole. In this case, the operating side plate opening 22 also has a rectangular shape. The fixed side pressure plate 19a may also be a rectangular plate as a whole. In this case, the fixed side plate opening 32 also has a rectangular shape.

[0047] The operating cord 17 may be a cord such as a braided string instead of a ball chain. In this case, the protrusion 25b of the engagement piece 25 only needs to be pressed against the pulley 16 to prevent the pulley 16 from rotating.

[0048] The tension mechanism provided in the moving part 11 may be of a jack type instead of a spring type. The operation units may be provided on both ends of the moving part. In addition, the elastic body such as a spring that constitutes the tension mechanism may be provided in the operation unit 14, or may be provided in both the operation unit 14 and the fixed unit 15.

[0049] The shading device may be a horizontal blind instead of the roller screen 10. In this case, the shading material is a slat, and the slat is raised and lowered by a lifting cord wound around a winding shaft that serves as a moving part. The lifting cord is wound around a winding cone that rotates together with the shaft that is rotated by the pulley 16.

[0050] The shading device may also be a vertical blind. In this case, the shading material is a vertical slat that is suspended on a runner that runs in a rail. The runner is attached to a belt that runs on a pulley 16.

[0051] Furthermore, the shielding device may be a roll-up curtain. In this case, the shielding material is a curtain, and the curtain is raised and lowered by a lifting cord that is wound around a winding shaft that is a moving part. The lifting cord is wound around a winding cone that rotates together with the shaft that is rotated by the pulley 16.

[0052] In this manner, the present invention is applicable to a shielding device that uses pulley 16 to raise and lower the shielding material, and in which the head portion is attached to opening 1 using a tension mechanism. [Explanation of symbols]

[0053] 10...Roller screen 11...Moving section 12. Screen 13...Winding pipe 14…Operation unit 15…Fixed unit 16…Pulley 16a…Recess 17...Operation code 18...Operation side pressing member 19...Fixed side pressing member 21...Operation side auxiliary plate 22…Operation side plate opening 25...Engagement piece 31…Fixed side auxiliary plate 41...Gap

Claims

1. A shielding device that opens and closes an opening with a shielding material, the shielding material being disposed in a tensioned state between a first vertical wall and a second vertical wall that form an opening, a moving unit that moves the shielding material to open and close the opening; An operation unit provided at one end of the moving part in a longitudinal direction, the operation unit including a pulley that rotates a member that moves the shielding material, and an operation cord that hangs down from the pulley and rotates the pulley; a fixed unit provided at the other end of the moving part in the longitudinal direction, the operation unit includes an operation-side pressing member that is a part of a tension mechanism that tensions the moving portion between the first vertical wall and the second vertical wall and presses the first vertical wall, the fixing unit is a part of the tension mechanism and includes a fixed-side pressing member that presses the second vertical wall, Further, an auxiliary plate is provided on the first vertical wall, The auxiliary plate has an engagement piece that can be engaged with the pulley when the operating side pressing member moves in the pulling direction of the operating cord. Shielding device.

2. The auxiliary plate is configured such that, in the pulling direction, the operating side pressing member moves from a state in which the operating side pressing member is separated from the pulley to the pulling direction, whereby the engagement piece engages with the pulley. The shielding device of claim 1.

3. the auxiliary plate includes a plate opening having an upper end on the opposite side to the pulling direction, through which the operation-side pressing member can escape when the operation-side pressing member is pressing the first vertical wall, When the plate is disposed on the first vertical wall, the bottom of the plate opening and the lower edge of the operation-side pressing member are spaced apart from each other.

3. A shielding device according to claim 1 or 2.

4. an upper wall that constitutes the opening is provided between the first vertical wall and the second vertical wall; When the auxiliary plate is disposed on the first vertical wall, the upper end of the plate abuts against the upper wall.

4. The shielding device of claim 3.

5. A shielding device that opens and closes an opening with a shielding material, the shielding material being disposed in a tensioned state between a first vertical wall and a second vertical wall that form an opening, a moving unit that moves the shielding material to open and close the opening; An operation unit provided at one end of the moving part in a longitudinal direction, the operation unit including a pulley that rotates a member that moves the shielding material, and an operation cord that hangs down from the pulley and rotates the pulley; a fixed unit provided at the other end of the moving part in the longitudinal direction, the operation unit includes an operation-side pressing member that is a part of a tension mechanism that tensions the moving portion between the first vertical wall and the second vertical wall and presses the first vertical wall, the fixing unit is a part of the tension mechanism and includes a fixed-side pressing member that presses the second vertical wall, Further, an auxiliary plate is provided on the first vertical wall, The auxiliary plate includes a load support portion, and the load support portion supports a load through the operation unit by the operation side pressing member moving in a pulling direction and contacting any position of the operation unit. Shielding device.

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