Roll screen

Abstract

To provide a roll screen capable of preventing a fixing pin for fixing a shaft part of a winding part capable of raising / lowering a screen to a side bracket from being attached in an incorrect attachment direction.SOLUTION: A roll screen includes a winding section 3 capable of raising / lowering a screen, a pair of side brackets each having a pair of bearing sections capable of supporting a pair of axles protruding from both ends of the winding section 3, and a fixing pin 5 for fixing a shaft section 9 to a bearing section 21. The fixing pin 5 has a folded section 36, a first leg section 37, and a second leg section 38. One of the side brackets 4 has an insertion restricting section 23 that abuts against the second leg section 38 to restrict insertion of the first leg section 37 into insertion holes of the axle section 9 and the bearing section 21 when the fixing pin 5 is in an incorrect installation orientation.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a roller blind. [Background technology]

[0002] As disclosed in Patent Document 1 below, a roll screen has been known that includes a winding shaft for winding up a screen and a support bracket for rotatably supporting the winding shaft. The support bracket has a support hole with an opening at the top. By inserting the core shaft of the winding shaft, which has a flange formed on its end, into the support hole through the opening, the winding shaft can be supported by the support bracket so that it cannot move in the axial direction.

[0003] Furthermore, the roller blind disclosed in Patent Document 1 below includes a stopper that moves to open and close the opening of the support bracket, and a fixing pin that is inserted into each insertion hole so as to pass through the stopper and the support bracket when the stopper closes the opening. The fixing pin has a locking portion formed by bending one end so as to fold back, and the support bracket has a locking pin that locks the locking portion of the fixing pin.

[0004] With this configuration, the locking portion of the fixing pin inserted into the support bracket and the stopper engages with the locking pin of the support bracket, preventing the fixing pin from falling off, thereby enabling the take-up shaft to be securely held on the support bracket. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-004751 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the roller blind configuration disclosed in Patent Document 1, the fixing pin can be inserted into the support bracket and stopper even if it is in the opposite direction to the correct installation direction, which means that the locking portion of the fixing pin will not engage with the locking pin of the support bracket, potentially causing the fixing pin to fall off. Therefore, there is a need for a roller blind that can prevent the fixing pin from being installed in the incorrect installation direction by mistake.

[0007] The present invention has been made in consideration of such problems, and aims to provide a roller blind that can prevent the fixing pin for fixing the shaft part of the winding part that can raise and lower the screen to the side bracket from being installed in an incorrect installation orientation. [Means for solving the problem]

[0008] The inventor believed that the above problem could be solved by configuring the side bracket so that the fixing pin could not be attached to it in an incorrect installation orientation, and based on this, he invented the following new roller blind.

[0009] (1) A roller blind according to the present invention comprises a winding section capable of raising and lowering the screen, a pair of side brackets each having a pair of bearing sections capable of supporting a pair of shaft sections protruding from both ends of the winding section, and a fixing pin that is partially inserted into a through hole formed in at least one of one of the shaft sections and one of the bearing sections and the other of the shaft section and the other bearing section to connect the shaft sections and the bearing sections, thereby fixing the shaft sections to the bearing sections, wherein the fixing pin has a folded section, a linear first leg section extending from one end of the folded section and insertable into the respective through holes of the shaft section and the bearing sections, and a second leg section extending from the other end of the folded section, and at least one of the pair of side brackets has an insertion restriction section that abuts against the second leg section to restrict insertion of the first leg into the respective insertion holes of the shaft section and the bearing sections when the fixing pin is in an incorrect installation orientation.

[0010] (2) In (1) above, the fixing pin has the second leg portion having a regulated portion formed on a portion thereof, and at least one of the pair of side brackets has a base portion that intersects with the axial direction of the winding portion and a regulating portion that stands up from the base and that regulates the first leg portion and the second leg portion of the fixing pin attached to the shaft portion and the bearing portion from expanding when the regulated portion abuts against the regulating portion, and it is preferable that the insertion regulating portion allows the first leg portion to be inserted into the insertion hole of each of the shaft portion and the bearing portion when the fixing pin is in the correct mounting orientation in which the regulated portion of the second leg can abut against the regulating portion.

[0011] (3) In (1) or (2) above, it is preferable that the insertion restricting portion has a flat lower end surface, and when the first leg portion is inserted into the insertion holes of the shaft portion and the bearing portion, the lower end of the fixing pin is positioned on a surface that conforms to the lower end surface of the insertion restricting portion.

[0012] (4) In any of (1) to (3) above, it is preferable that the insertion regulating portion has an abutment portion that abuts against the second leg portion when the fixing pin is in the incorrect installation orientation, and a guide portion that extends along the insertion direction of the insertion hole.

[0013] (5) In any of the above (1) to (4), the insertion restriction portion is preferably attached to the side bracket in the vicinity of the bearing portion.

[0014] (6) In any one of the above (1) to (4), it is preferable that the insertion restriction portion is formed integrally with the bearing portion. [Effects of the Invention]

[0015] The present invention is configured so that the fixing pin cannot be attached to the side bracket in an incorrect installation orientation, thereby providing a roller blind that can prevent the fixing pin, which secures the shaft of the winding part that can raise and lower the screen to the side bracket, from being attached in an incorrect installation orientation. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing a state in which a roller blind according to a first embodiment of the present invention is used. [Figure 2] 1 is a partially enlarged front view showing a state in which the roller blind according to the first embodiment of the present invention is in use. [Figure 3] 1 is an exploded perspective view showing a roller blind according to a first embodiment of the present invention. [Figure 4] 1 is an exploded perspective view showing a part of a roller blind according to a first embodiment of the present invention. [Figure 5] 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 6] FIG. 10 is an explanatory diagram showing a state in which a fixing pin is being attached in an incorrect attachment direction. [Figure 7] FIG. 10 is an explanatory diagram showing the mounting state of a fixing pin in a conventional roller blind. [Figure 8] FIG. 10 is a perspective view showing a part of a roller blind according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0018] As shown in Fig. 1, a roller blind 1 of the first embodiment is installed in an opening such as a window frame of a building. The roller blind 1 is installed in a room that is separated from the outside of the building by window glass or the like. As shown in Figs. 1 to 3, the roller blind 1 is typically an electric roller blind, and includes a winding unit 3 that can raise and lower a screen 2, a pair of side brackets 4, 4 that can support both ends of the winding unit 3, and a pair of fixing pins 5, 5 that fix both ends of the winding unit 3 to the pair of side brackets 4, 4, respectively. In this specification, when the roller blind 1 is installed, the axial direction of the winding part 3 is the left-right direction, and the direction perpendicular to the up-down direction and the left-right direction is the front-rear direction. In addition, in the front-rear direction, the indoor side is the front, and the outdoor side is the rear.

[0019] The winding unit 3 has a winding pipe 6 to which one end of the screen 2 is connected, and a motor 7 that rotates the winding pipe 6. The winding pipe 6 is cylindrical and open at both axial ends. The winding pipe 6 is attached so as to span between a pair of side brackets 4, 4 that are spaced apart in the left-right direction. When the winding pipe 6 is attached to the pair of side brackets 4, 4, the winding pipe 6 is rotatable around its axis. The motor 7 is housed inside the winding pipe 6 at one axial end of the winding pipe 6. In the illustrated example, the motor 7 is located at the left end inside the winding pipe 6. When the motor 7 is located inside the winding pipe 6, the left end of the motor 7 protrudes leftward from the winding pipe 6.

[0020] The screen 2 is a shielding material and is provided so that it can be wound up and unwound around the winding pipe 6. The upper end of the screen 2 is connected to the winding pipe 6, and the lower end hangs down from the winding pipe 6. A weight bar 8 is provided at the lower end of the screen 2. The screen 2 can be raised and lowered by driving a motor 7 inside the winding pipe 6. Specifically, the screen 2 can be wound up around the winding pipe 6 by rotating the winding pipe 6 in one direction using the motor 7, and can be unwound from the winding pipe 6 by rotating the winding pipe 6 in the other direction using the motor 7. By driving the motor 7 to raise and lower the screen 2 in this way, the opening of the building can be opened and closed.

[0021] The motor 7 that rotates the winding pipe 6 is controlled by a control device (not shown). The control device may be provided inside the winding pipe 6 or outside the winding pipe 6. The roller blind 1 of the first embodiment can be operated, for example, by a remote controller (not shown). In this case, the control device controls the motor 7 that rotates the winding pipe 6 based on a signal from the remote controller.

[0022] To lower the screen 2, a lowering switch on the remote controller is operated, which outputs a lowering signal to the control device to lower the screen 2. When the lowering signal is input to the control device, the control device drives the motor 7 to rotate the winding pipe 6 in the direction to unwind the screen 2. To raise the screen 2, a lifting switch on the remote controller is operated, which outputs an lifting signal to the control device to raise the screen 2. When the lifting signal is input to the control device, the control device drives the motor 7 to rotate the winding pipe 6 in the direction to wind the screen 2. Note that the roller blind 1 of the first embodiment is configured to be operated by a remote controller, but is not limited to this. For example, the roller blind 1 may be configured to be operated by an operating switch provided on the wall of a building.

[0023] A pair of shafts protrudes from both ends of the winding unit 3. Of the pair of shafts, the first shaft 9 protruding from one end of the winding unit 3 is provided at the end of the motor 7 inside the winding pipe 6. In the first embodiment, as described above, the motor 7 is disposed at the left end inside the winding pipe 6. In this case, the first shaft 9 is provided at the left end of the motor 7. The first shaft 9 protrudes leftward from the left end of the motor 7. In the illustrated example, the first shaft 9 is provided on an adapter 10 fixed to the motor 7. Therefore, the first shaft 9 is provided on the motor 7 by fixing the adapter 10 to the left end of the motor 7.

[0024] The first shaft portion 9 has a locking piece 11 at its tip end that protrudes in a direction intersecting the axial direction of the first shaft portion 9. As shown in Figure 3, the first shaft portion 9 has a shaft piece 12 that protrudes from one end of the winding portion 3, a fitting member 14 that can be fitted onto the shaft piece 12, and a tubular member 15 for attaching the fitting member 14 to the shaft piece 12.

[0025] The shaft piece 12 has a rectangular columnar cross section perpendicular to its axial direction. The shaft piece 12 is attached to the adapter 10, and is attached to the left end of the motor 7 by attaching the adapter 10 to the motor 7. The shaft piece 12 protrudes leftward from the left end of the motor 7. An insertion hole 13 is formed in the shaft piece 12 along a direction perpendicular to its axial direction. The insertion hole 13 has a circular cross section perpendicular to the axial direction and passes through the shaft piece 12. One axial end of the insertion hole 13 opens to one of the four outer surfaces of the shaft piece 12. The other axial end of the insertion hole 13 opens to the other of the four outer surfaces of the shaft piece 12 that is located opposite the one surface.

[0026] The fitting member 14 has a U-shaped plate shape in a side view, and includes two shaft-side open end pieces 16, 16 that are spaced apart from each other, and a central piece 17 that connects the ends of the shaft-side open end pieces 16, 16. An insertion hole 18 is formed in each of the shaft-side open end pieces 16, 16. The insertion hole 18 in one of the shaft-side open end pieces 16 has a circular cross section perpendicular to its axial direction and penetrates one of the shaft-side open end pieces 16. The insertion hole 18 in the other shaft-side open end piece 16 has a circular cross section perpendicular to its axial direction and penetrates the other shaft-side open end piece 16. The insertion hole 18 in one shaft-side open end piece 16 and the insertion hole 18 in the other shaft-side open end piece 16 are aligned on the same axis. The central piece 17 is provided with the locking piece 11 described above. The locking piece 11 is formed at one end of the central piece 17 in a direction perpendicular to the direction in which the shaft-side open end pieces 16, 16 face each other.

[0027] The cylindrical member 15 is cylindrical and can be inserted into the insertion holes 13, 18 formed in the shaft piece 12 and the fitting member 14 so as to communicate with each other. In the first embodiment, the cylindrical member 15 is a spring pin, but is not limited to this.

[0028] In the first shaft portion 9 configured as described above, with the shaft piece 12 disposed between the shaft-side open end pieces 16, 16 of the fitting member 14, the tubular member 15 is inserted into the insertion hole 13 of the shaft piece 12 and the insertion hole 18 of the shaft-side open end pieces 16, 16, so that the fitting member 14 is fitted to the shaft piece 12 so as not to move. When the fitting member 14 is attached to the shaft piece 12, the locking piece 11 is located on the tip end side of the shaft piece 12. In the first embodiment, the fitting member 14, which is U-shaped in side view, is attached to the prismatic shaft piece 12, so that the outer surface of the first shaft portion 9 has a rectangular shaft shape. Furthermore, the locking piece 11 protrudes in a direction intersecting with one of the outer surfaces of the first shaft portion 9.

[0029] Although not shown, the output shaft of the motor 7 is located at the end opposite to the end where the first shaft portion 9 is provided. A drive ring is provided at the tip of the output shaft of the motor 7. The drive ring is attached to the output shaft of the motor 7 so as to be rotatable integrally therewith. The drive ring is fixed to the inner circumferential surface of the winding pipe 6. With this configuration, the drive ring can be rotated by driving the motor 7, and the rotation of the drive ring can rotate the winding pipe 6.

[0030] Of the pair of shafts, the second shaft (not shown) protrudes from the other end of the winding unit 3, and the length by which it protrudes from the winding unit 3 is adjustable. The second shaft is provided in a bearing unit (not shown) located at the right end of the winding pipe 6. The second shaft protrudes rightward from the right end of the bearing unit. The second shaft is provided in the bearing unit so as to be movable back and forth in its axial direction.

[0031] The outer surface of the tip of the second shaft portion is rectangular. The tip of the second shaft portion is cylindrical with a cross section perpendicular to the axial direction of the second shaft portion. An insertion hole is formed in the tip of the second shaft portion along a direction perpendicular to the axial direction of the second shaft portion. The insertion hole penetrates the second shaft portion. One axial end of the insertion hole opens into one of the four outer surfaces of the tip of the second shaft portion. The other axial end of the insertion hole opens into the other of the four outer surfaces of the tip of the second shaft portion that is located opposite to the one surface. A rib is provided at the tip of the rectangular shaft-shaped portion of the second shaft portion.

[0032] Although not shown, a support shaft extending from the second shaft portion is provided inside the case of the bearing unit. The support shaft rotatably supports the case of the bearing unit via a ball bearing. With this configuration, when the motor 7 is driven to rotate the winding pipe 6, the case of the bearing unit rotates together with the winding pipe 6, but the support shaft supporting the case does not rotate together with the winding pipe 6.

[0033] The pair of side brackets 4, 4 each have a pair of bearings 21, 21 capable of supporting the pair of shafts of the winding unit 3, respectively. The pair of side brackets 4, 4 are fixed to a supported object such as a ceiling surface while being spaced apart in the left-right direction. In the first embodiment, the pair of left and right side brackets 4, 4 have a symmetrical configuration. Therefore, only the left side bracket 4 will be described here, and a description of the right side bracket 4 will be omitted. As shown in FIGS. 3 and 4 , the left side bracket 4 has an attachment portion 19 attached to a supported object such as a ceiling surface, a base portion 20 intersecting the axial direction of the first shaft portion 9 and the axial direction of the winding unit 3, a bearing portion 21 provided on the base portion 20, a restricting portion 22 provided on the base portion 20, and an insertion restricting portion 23 provided on the base portion 20.

[0034] The mounting portion 19 is plate-shaped, with its plate surface facing up and down. The mounting portion 19 is fixed to the supported object with screws or the like, with the upper plate surface abutting against the supported object. A plate-shaped base 20 is provided at the left end of the mounting portion 19. The base 20 protrudes downward from the left end of the mounting portion 19, with the plate surface facing left and right. A rib 24 is provided at the corner between the mounting portion 19 and the base 20 to reinforce the corner formed by the mounting portion 19 and the base 20. In the first embodiment, the mounting portion 19 and the base 20 are integrally formed, but this is not limited thereto and they may be separate members.

[0035] The bearing portion 21 is provided on the plate surface on the right side of the base portion 20. The bearing portion 21 has a wall portion 25 provided on the base portion 20 and a pair of fixing portions 26, 26 that attach the wall portion 25 to the base portion 20.

[0036] The wall portion 25 is capable of receiving the first shaft portion 9. In the illustrated example, the wall portion 25 is a U-shaped plate in a side view with an open front side, and has receiving-side open end pieces 27, 27 that are spaced apart from each other, and a central piece 28 that connects the rear ends of the receiving-side open end pieces 27, 27. An insertion hole 29 is formed in each of the receiving-side open end pieces 27, 27. The insertion hole 29 in one of the receiving-side open end pieces 27 has a circular cross section perpendicular to its axial direction and penetrates one of the receiving-side open end pieces 27. The insertion hole 29 in the other receiving-side open end piece 27 has a circular cross section perpendicular to its axial direction and penetrates the other receiving-side open end piece 27. The insertion hole 29 in one receiving-side open end piece 27 and the insertion hole 29 in the other receiving-side open end piece 27 are arranged on the same axis. A protrusion 30 that protrudes forward is formed at the front end of each of the receiving-side open end pieces 27, 27. An opening 31 into which the locking piece 11 of the first shaft portion 9 can be inserted is formed in a part of the wall portion 25. This opening 31 is formed in a portion of the wall portion 25 that is located on the rear side. Specifically, the opening 31 is formed in the central piece 28. Therefore, the left end of each of the receiving-side open end pieces 27, 27 extends leftward beyond the central piece 28.

[0037] The pair of fixing portions 26, 26 are each plate-shaped and provided on both receiving-side open end pieces 27, 27 of the wall portion 25. Of the pair of fixing portions 26, 26, the upper fixing portion 26 is provided on the upper receiving-side open end piece 27. The upper fixing portion 26 extends upward from the upper receiving-side open end piece 27 with the plate surface facing left and right. A through hole 32 penetrating in the left and right direction is formed in the upper fixing portion 26. Of the pair of fixing portions 26, 26, the lower fixing portion 26 is provided on the lower receiving-side open end piece 27. The lower fixing portion 26 extends downward from the lower receiving-side open end piece 27 with the plate surface facing left and right. A through hole 32 penetrating in the left and right direction is formed in the lower fixing portion 26.

[0038] With this configuration, one bearing portion 21 is detachably attached to the base 20 by threading a screw 34 through the through hole 32 of the pair of fixing portions 26 and into the screw hole 33 of the base 20 with the left plate surface of the pair of fixing portions 26 abutting against the right plate surface of the base 20. When one bearing portion 21 is fixed to the base 20, the wall portion 25 stands upright from the base 20. As described above, the left end of the receiving-side open end piece 27 extends leftward beyond the central piece 28. Therefore, when one bearing portion 21 is fixed to the base 20, the opening 31 formed in the central piece 28 is located in the gap between the right surface of the base 20 and the left end of the central piece 28.

[0039] The restricting portion 22 is provided upright from the base 20. In the illustrated example, the restricting portion 22 is plate-shaped and provided at the front end of the upper fixed portion 26. With the plate surface facing forward and backward, the restricting portion 22 extends rightward from the front end of the upper fixed portion 26. Specifically, the restricting portion 22 extends rightward beyond the insertion hole 29 of the receiving-side open end piece 27. The restricting portion 22 has an inclined surface 35 at the lower end on the tip side. The inclined surface 35 faces diagonally downward to the right. The restricting portion 22 is also inclined so that its upper end faces further forward than its lower end. The upper fixed portion 26 extends forward beyond the wall portion 25. Therefore, the restricting portion 22 provided at the front end of the upper fixed portion 26 is located forward of the wall portion 25 of the bearing portion 21.

[0040] Both axial ends of the retractor 3 are fixed to a pair of side brackets 4, 4 by a pair of fixing pins 5, 5. The pair of fixing pins 5, 5 have the same configuration. Therefore, only the fixing pin 5 that fixes the left end of the retractor 3 to the left side bracket 4 will be described, and a description of the fixing pin 5 that fixes the right end of the retractor 3 to the right side bracket 4 will be omitted.

[0041] As shown in FIGS. 3 and 5 , one of the fixing pins 5 is a bifurcated snap pin having a folded portion 36, a first leg portion 37 extending from one end of the folded portion 36, and a second leg portion 38 extending from the other end of the folded portion 36. The folded portion 36 is formed by folding a wire rod. The first leg portion 37 is linear and can be inserted into the insertion holes 13, 18, and 29 formed in the first shaft portion 9 and the bearing portion 21, respectively, i.e., the tubular member 15 and the insertion hole 29 that communicate with these insertion holes 13 and 18. The second leg portion 38 extends in the same direction as the first leg portion 37. A restricted portion 39 that abuts against the restricting portion 22 provided on the base portion 20 is formed in a portion of the second leg portion 38. Typically, the second leg portion 38 has a bent portion 40 provided at the other end of the folded portion 36, a curved portion 41 provided at the tip of the bent portion 40, and a regulated portion 39 provided at the tip of the curved portion 41.

[0042] The bent portion 40 is formed by bending the wire rod. The bent portion 40 extends from the folded-back portion 36 toward the first leg portion 37. The curved portion 41 extends from the tip of the bent portion 40 in the same direction as the extension direction of the first leg portion 37. The curved portion 41 is curved so as to bulge in a direction away from the first leg portion 37. The regulated portion 39 is formed by bending back the tip of the second leg portion 38. The tip of the second leg portion 38 extends obliquely away from the first leg portion 37 and is also bent back in a direction away from the first leg 37. In this way, the fixing pin 5 is formed by appropriately bending the wire rod. The other fixing pin 5 fixes the right end of the winding portion 3 to the right side bracket 4. Therefore, the first leg portion 37 of the other fixing pin 5 can be inserted into the insertion holes formed in the second shaft portion and the bearing portion 21.

[0043] Next, the procedure for installing the winding unit 3 between a pair of left and right side brackets 4, 4 will be described using Figures 1, 2, 3, and 5. The pair of left and right side brackets 4, 4 are attached to a supported object, such as a ceiling surface, with a space between them in the left-right direction. The left side bracket 4 is attached to the supported object by screwing a screw into the supported object through the attachment portion 19 with the attachment portion 19 abutting the supported object. When the left side bracket 4 is attached to the supported object, the attachment portion 19 extends rightward from the base 20. When the right side bracket 4 is attached to the supported object, the attachment portion 19 extends leftward from the base 20.

[0044] To install the retractor 3 on the pair of side brackets 4, 4 attached to the supported body in this manner, after assembling the first shaft 9, the second shaft is attached to the bearing 21 of the right side bracket 4. At this time, the second shaft is attached to the bearing 21 so that the insertion hole of the second shaft communicates with the insertion hole 29 of the bearing 21. With the second shaft attached to the bearing 21, the rib of the second shaft is engaged with the opening 31 of the bearing 21.

[0045] As described above, the second shaft portion is configured so that the amount of protrusion from the winding pipe 6 can be adjusted. Therefore, by moving the winding pipe 6 to the left, the second shaft portion is pulled out from inside the winding pipe 6, and the amount of protrusion from the winding pipe 6 increases. In this manner, while moving the winding pipe 6 to the left, the first shaft portion 9 is attached to the bearing portion 21 of the side bracket 4 located on the left side. At this time, the first shaft portion 9 is attached to the bearing portion 21 so that the insertion holes 13, 18 of the first shaft portion 9 communicate with the insertion hole 29 of the bearing portion 21. In other words, the insertion hole 13 of the shaft piece 12, the insertion hole 18 of the fitting member 14, and the insertion hole 29 of the bearing portion 21 communicate with each other. When the first shaft portion 9 is attached to the bearing portion 21 of the side bracket 4 located on the left side, the locking piece 11 of the first shaft portion 9 is inserted into the opening 31 of the bearing portion 21. In the case of the first shaft portion 9, the shaft piece 12 is thus supported by one of the bearing portions 21 with the fitting member 14 fitted thereto. Therefore, even if a force is applied to move the take-up pipe 6 to the right when the first shaft portion 9 and the second shaft portion are attached to the bearing portion 21, the locking piece 11 is locked in the opening 31, so that the movement of the first shaft portion 9 is restricted and the first shaft portion 9 remains placed on the bearing portion 21, preventing the take-up pipe 6 from falling during installation.

[0046] After the first shaft portion 9 is attached to the bearing portion 21 of the side bracket 4 located on the left side, the first shaft portion 9 is fixed to the bearing portion 21 with the fixing pin 5, and the second shaft portion is fixed to the bearing portion 21 with the fixing pin 5. When the first shaft portion 9 is fixed to the bearing portion 21, the first leg portion 37 of the fixing pin 5 is inserted into the insertion hole 13 of the shaft piece 12, the insertion hole 18 of the fitting member 14, and the insertion hole 29 of the bearing portion 21.

[0047] The first leg 37 of the fixing pin 5 is inserted from below into the insertion hole 29 of the lower receiving-side open end piece 27. Thereafter, the first leg 37 of the fixing pin 5 is inserted into the insertion hole 18 of the lower shaft-side open end piece 16, the insertion hole 13 of the shaft piece 12, the insertion hole 18 of the upper shaft-side open end piece 16, and the insertion hole 29 of the upper receiving-side open end piece 27, in that order. When the first leg 37 is inserted into the insertion hole 13 of the shaft piece 12 and the insertion holes 18 of the shaft-side open end pieces 16, 16, the first leg 37 of the fixing pin 5 is inserted into the tubular member 15. As the first leg 37 of the fixing pin 5 is inserted into the insertion holes 13, 18, 29 in this manner, the restricted portion 39 of the fixing pin 5 comes into contact with the restricting portion 22. As described above, the restricting portion 22 has an inclined surface 35. Therefore, as the first leg portion 37 of the fixing pin 5 is inserted into each of the insertion holes 13, 18, and 29, the restricted portion 39 of the fixing pin 5 comes into contact with the inclined surface 35 and moves upward while being pushed rightward. Then, as the first leg portion 37 of the fixing pin 5 is further inserted into each of the insertion holes 13, 18, and 29, the restricted portion 39 of the fixing pin 5 passes over the restricting portion 22 and is positioned behind the restricting portion 22. In this manner, the first shaft portion 9 can be fixed to the bearing portion 21 by inserting a portion of the fixing pin 5 into the insertion holes 13, 18, and 29 formed so as to communicate between the first shaft portion 9 and the bearing portion 21. Note that the step of fixing the second shaft portion to the bearing portion 21 with the fixing pin 5 may be performed before the first shaft portion 9 is completely attached to the bearing portion 21.

[0048] When the first leg portion 37 of the fixing pin 5 is inserted into each insertion hole 13, 18, 29, the restricted portion 39 of the fixing pin 5 climbs over the restricting portion 22 due to the action of the inclined surface 35. Therefore, the restricting portion 22 has the inclined surface 35 that is inclined so as to guide the movement of the restricted portion 39 at the position where the restricted portion 39 abuts when the first leg portion 37 is inserted into each insertion hole 13, 18, 29 of the first shaft portion 9 and the bearing portion 21. When the first shaft portion 9 is fixed to the bearing portion 21 by the fixing pin 5, the second leg portion 38 of the fixing pin 5 is located in front of the receiving-side open end pieces 27. Therefore, the convex portions 30 of the receiving-side open end pieces 27 can prevent the fixing pin 5 from rotating backward around the first leg 37.

[0049] The procedure for fixing the second shaft portion to the bearing portion 21 of the side bracket 4 located on the right side is the same as the procedure for fixing the first shaft portion 9 to the bearing portion 21. Specifically, it is as follows. When the second shaft portion is fixed to the bearing portion 21, the first leg portion 37 of the fixing pin 5 is inserted, in this order, into the insertion hole 29 of the receiving-side open end piece 27 located on the lower side, the insertion hole of the second shaft portion, and the insertion hole 29 of the receiving-side open end piece 27 located on the upper side. At this time, the regulated portion 39 of the fixing pin 5 climbs over the regulating portion 22 due to the action of the inclined surface 35 of the regulating portion 22.

[0050] Next, the restricting portion 22 will be described. As described above, the restricting portion 22 of the side bracket 4 located on the left side extends rightward beyond the insertion holes 29 of the receiving-side open end pieces 27, 27. Therefore, the restricting portion 22 extends toward the winding portion 3 further than the fixing pin 5 fixed to the first shaft portion 9 and the bearing portion 21. The restricting portion 22 of the side bracket 4 located on the right side extends leftward beyond the insertion holes 29 of the receiving-side open end pieces 27, 27. Therefore, the restricting portion 22 extends toward the winding portion 3 further than the fixing pin 5 fixed to the second shaft portion and the bearing portion 21.

[0051] For example, if the end of the screen 2 is misaligned and biased to the left, the end of the screen 2 will come into contact with the tip of the regulating portion 22 of the side bracket 4 located on the left side, thereby preventing it from coming into contact with the fixing pin 5. If the end of the screen 2 is misaligned and biased to the right, the end of the screen 2 will come into contact with the tip of the regulating portion 22 of the side bracket 4 located on the right side, thereby preventing it from coming into contact with the fixing pin 5.

[0052] When an end of the screen 2 is mis-wound and deviates to the left, and the end of the screen 2 comes into contact with the fixing pin 5 and applies an external force, the regulated portion 39 of the fixing pin 5 comes into contact with the regulating portion 22 of the left side bracket 4, thereby preventing the second leg 38 of the fixing pin 5 from moving. In particular, the regulating portion 22 is inclined so that the upper end faces forward more than the lower end, thereby preventing the regulated portion 39 from expanding and moving downward. Furthermore, when an end of the screen 2 is mis-wound and deviates to the right, and the end of the screen 2 comes into contact with the fixing pin 5 and applies an external force, the regulated portion 39 of the fixing pin 5 comes into contact with the regulating portion 22 of the right side bracket 4, thereby preventing the second leg 38 of the fixing pin 5 from moving. In this way, the regulated portion 39 comes into contact with the regulating portion 22, preventing the first leg 37 and the second leg 38 of the fixing pin 5, which are attached to the first shaft 9, the second shaft, and the bearing 21, from expanding.

[0053] Up to this point, we have described the case where the fixing pin 5 is attached to the bearing portion 21 in the correct attachment orientation. The correct attachment orientation is when the restricted portion 39 of the second leg portion 38 of the fixing pin 5 can abut against the restricting portion 22 of the side bracket 4. In the illustrated example, the correct attachment orientation is when the second leg portion 38 is located on the front side. Next, we will describe the case where the fixing pin 5 is attached to the bearing portion 21 in an incorrect attachment orientation that is opposite to the correct attachment orientation. In the illustrated example, the incorrect attachment orientation is when the second leg portion 38 is located on the rear side. As shown in Figures 4 and 5 , the insertion restricting portion 23 has an attachment portion 42, a main body portion 43, and a positioning portion 44.

[0054] The mounting portion 42 is generally cylindrical. One axial end surface of the mounting portion 42 is formed with a recess 45 that is recessed toward the other axial end. The recess 45 opens toward the one axial end. A through hole 46 that penetrates the mounting portion 42 is formed at the bottom of the recess 45. The through hole 46 is formed along the axial direction of the mounting portion 42.

[0055] A main body 43 is provided on the mounting portion 42. In the illustrated example, the main body 43 has a generally rectangular block shape in side view. Therefore, the main body 43 has two outer surfaces corresponding to sides facing each other in the vertical direction and two outer surfaces corresponding to sides facing each other in the front-rear direction. Of the sides facing each other in the front-rear direction, the outer surface corresponding to the side located on the rear side is inclined obliquely rearward. As shown in FIG. 5 , the main body 43 is provided on the mounting portion 42 with a corner between the outer surface located on the upper side and the outer surface located on the rear side in contact with the outer peripheral surface of the mounting portion 42.

[0056] The main body 43 has an abutment portion 47 and a guide portion 48. In the illustrated example, the abutment portion 47 corresponds to the lower outer surface of the four outer surfaces of the main body 43, and the guide portion 48 corresponds to the front outer surface of the four outer surfaces of the main body 43. Therefore, the insertion restricting portion 23 has the abutment portion 47 and the guide portion 48. Because the lower outer surface of the four outer surfaces of the main body 43 is flat, the abutment portion 47 is also flat. Therefore, the insertion restricting portion 23 has a flat lower end surface.

[0057] The positioning portion 44 is plate-shaped, with its plate surface facing forward and backward. The positioning portion 44 is provided at the contact point between the main body portion 43 and the mounting portion 42. The positioning portion 44 extends upward from the contact point. A protrusion 49 is provided on the front surface of the positioning portion 44. The protrusion 49 protrudes forward from the front surface of the positioning portion 44.

[0058] The insertion restricting portion 23 configured as described above is attached to the base 20 of the side bracket 4. Specifically, with the mounting portion 42 abutting against the right surface of the base 20, a screw 50 is threaded into the screw hole 33 of the base 20 via the through hole 46 of the mounting portion 42, thereby detachably attaching the insertion restricting portion 23 to the base 20. The head of the screw 50 is accommodated in the recess 45. As shown in FIG. 5 , when the insertion restricting portion 23 is attached to the base 20, the main body 43 is located on the front side, and the mounting portion 42 is located on the rear side. When the insertion restricting portion 23 is attached to the base 20, the insertion restricting portion 23 is located rearward of the insertion hole 29 of the bearing portion 21. When the insertion restricting portion 23 is attached to the base 20, the guide portion 48 of the insertion restricting portion 23 is located below the wall portion 25 and is inclined diagonally rearward. With the insertion restricting portion 23 attached to the base 20, the protrusion 49 of the positioning portion 44 contacts the rear surface of the central piece 28 of the bearing portion 21. In this way, the insertion restricting portion 23 is detachably attached to the side bracket 4 in the vicinity of the bearing portion 21.

[0059] As shown in FIG. 6 , when an attempt is made to attach the fixing pin 5 to the bearing 21 in an incorrect installation orientation, the second leg 38 of the fixing pin 5 comes into contact with the abutment portion 47 of the insertion restricting portion 23. In this way, the insertion restricting portion 23 has the abutment portion 47 that abuts against the second leg 38 when the fixing pin 5 is in an incorrect installation orientation. Therefore, when the fixing pin 5 is in an incorrect installation orientation, the insertion restricting portion 23 abuts against the second leg 38, thereby restricting the insertion of the first leg 37 into the respective insertion holes 13, 18, 29 of the first shaft portion 9 and the bearing 21. In contrast, in the conventional case where there is no insertion restricting portion 23, the fixing pin 5 can easily be attached to the bearing 21 in an incorrect installation orientation, as shown in FIG. 7 .

[0060] As shown in FIG. 5 , when the fixing pin 5 is attached to the bearing 21 in the correct attachment orientation, the second leg 38 of the fixing pin 5 does not come into contact with the abutment portion 47 of the insertion restricting portion 23. Therefore, when the fixing pin 5 is attached in the correct attachment orientation in which the restricted portion 39 of the second leg 38 can come into contact with the restricting portion 22, the insertion restricting portion 23 allows the first leg 37 to be inserted into the respective insertion holes 13, 18, and 29 of the first shaft 9 and the bearing 21. When the fixing pin 5 is attached to the bearing 21 in the correct attachment orientation, the fixing pin 5 is guided by the guide portion 48 extending along the insertion direction of the respective insertion holes 13, 18, and 29 of the first shaft 9 and the bearing 21. At this time, the fixing pin 5 may be inserted into the insertion hole 29 so as to come into contact with and follow the guide portion 48. In this manner, when the first leg portion 37 is inserted into the respective insertion holes 13, 18, 29 of the first shaft portion 9 and the bearing portion 21, the lower end of the fixing pin 5 is positioned on a surface 51 that is aligned with the lower end surface of the insertion restricting portion 23.

[0061] In the case of the roller blind 1 of the present embodiment 1, the roller blind 1 has an insertion restriction portion 23 with which the fixing pin 5 comes into contact when an attempt is made to attach the fixing pin 5 in an incorrect attachment orientation. Therefore, the roller blind 1 of the present embodiment 1 can prevent the bifurcated fixing pin 5 from being attached in an incorrect attachment orientation by mistake.

[0062] In the case of the roller blind 1 of this embodiment 1, the roller blind 1 has the insertion restricting portion 23 of the above-mentioned configuration and a restricting portion 22 that prevents the fixing pin 5 from widening. Therefore, despite the roller blind 1 of this embodiment 1 having an attachment structure that can prevent a properly attached bifurcated fixing pin 5 from unintentionally widening and falling off, it is possible to prevent the fixing pin 5 from being attached in an incorrect orientation, which would result in the restricting portion 22 not working to its full potential.

[0063] In the case of the roller blind 1 of the first embodiment, the insertion restricting portion 23 of the roller blind 1 has a flat lower end surface. Therefore, according to the roller blind 1 of the first embodiment, by touching with a finger or the like to confirm that the end of the fixing pin 5 and the end of the insertion restricting portion 23 are aligned, it is possible to confirm that the fixing pin 5 has been properly attached without visual confirmation. Specifically, if the fixing pin 5 gets caught on the finger when the finger is moved forward on the surface 51 along the abutment portion 47, which is the lower end surface of the insertion restricting portion 23, it can be determined that the fixing pin 5 is not properly attached to the bearing portion 21. In the illustrated example, the folded portion 36 of the fixing pin 5 has a straight portion, making it easy to confirm that the fixing pin 5 has been properly attached.

[0064] In the case of the roller blind 1 of the present embodiment 1, the insertion restricting portion 23 of the roller blind 1 has a contact portion 47 and a guide portion 48. Therefore, according to the roller blind 1 of the present embodiment 1, it is possible to improve the ease of installation when attaching the fixing pin 5.

[0065] In the case of the roller blind 1 of this embodiment 1, the insertion restricting portion 23 of the roller blind 1 is attached to the side bracket 4 near the bearing portion 21. Therefore, according to the roller blind 1 of this embodiment 1, the effect of the insertion restricting portion 23 can be obtained with a simple structure in which the members constituting the insertion restricting portion 23 are simply attached to the existing side bracket.

[0066] Next, a roller blind 1a according to the second embodiment will be described with reference to Figure 8. Components having the same reference numerals as those in the first embodiment have the same functions, and therefore their description may be omitted. Here, the insertion restriction portion 23 provided on the side bracket 4 located on the left side will be described. The side bracket 4 located on the right side is symmetrical to the side bracket 4 located on the left side, and therefore its description will be omitted.

[0067] In the first embodiment, the insertion restricting portion 23 was detachably attached to the base 20, but in the second embodiment, it is formed integrally with the bearing portion 21. The insertion restricting portion 23 is plate-shaped, with the plate surface facing up and down. The insertion restricting portion 23 is provided on the fixed portion 26 located on the lower side. The insertion restricting portion 23 protrudes to the right from the fixed portion 26 located on the lower side. The bearing portion 21 having such an insertion restricting portion 23 can be formed by bending a plate material.

[0068] In the case of the roller blind 1a of the second embodiment, the insertion restricting portion 23 of the roller blind 1a is formed integrally with the bearing portion 21. Therefore, according to the roller blind 1a of the second embodiment, the effect of the insertion restricting portion 23 can be obtained without increasing the number of parts.

[0069] The present invention is not limited to the above-described first and second embodiments, and includes modifications and improvements within the scope of achieving the object of the present invention.

[0070] For example, in the first and second embodiments, both ends of the winding portion 3 are fixed to the bearing portion 21 by the fixing pin 5, but this is not limiting, and one of both ends of the winding portion 3 may be fixed by the fixing pin 5. That is, the fixing pin 5 may be used in at least one of the first shaft portion 9 and one bearing portion 21, and the second shaft portion and the other bearing portion 21. Therefore, the restricting portion 22 and the insertion restricting portion 23 may be provided in at least one of the pair of side brackets 4, 4. [Explanation of symbols]

[0071] 1 Roller blind 2 screens 3 Winding section 4 Side Bracket 5 fixing pin 9 First shaft 13 Insertion hole 18 Insertion hole 20 base 21 Bearing section 22 Regulatory Department 23 Insertion restriction section 29 insertion hole 36 Turnback 37 1st leg 38 Second leg 39 Regulated Department 47 When the connection 48 ガイドBU

Claims

1. a winding unit capable of raising and lowering the screen; a pair of side brackets each having a pair of bearing portions capable of supporting a pair of shaft portions protruding from both ends of the winding portion; a fixing pin that is partially inserted into an insertion hole formed in at least one of the one shaft portion and one bearing portion, and the other shaft portion and the other bearing portion so as to communicate with the shaft portion and the bearing portion, thereby fixing the shaft portion to the bearing portion; the fixing pin has a folded portion, a linear first leg portion extending from one end of the folded portion and insertable into the insertion holes of the shaft portion and the bearing portion, and a second leg portion extending from the other end of the folded portion, A roller blind in which at least one of the pair of side brackets has an insertion restriction portion that abuts against the second leg portion to restrict insertion of the first leg portion into the insertion holes of the shaft portion and the bearing portion when the fixing pin is in an incorrect installation orientation.

2. the fixing pin has the second leg portion having a regulated portion formed in a part thereof, At least one of the pair of side brackets has a base portion that intersects with the axial direction of the winding portion, and a regulating portion that is provided upright from the base portion and that regulates the first leg portion and the second leg portion of the fixing pin attached to the shaft portion and the bearing portion from expanding when the regulated portion abuts against the regulated portion, The roller blind as described in claim 1, wherein the insertion regulating portion allows the first leg to be inserted into the insertion holes of the shaft portion and the bearing portion when the insertion regulating portion is in the correct installation orientation in which the regulated portion of the second leg can abut against the regulating portion.

3. The insertion restriction portion has a flat lower end surface, A roller blind as described in claim 1, wherein when the first leg portion is inserted into the insertion holes of the shaft portion and the bearing portion, the lower end of the fixing pin is positioned on a surface that conforms to the lower end surface of the insertion restricting portion.

4. The roller blind as described in claim 1, wherein the insertion regulating portion has an abutment portion that abuts against the second leg portion when the fixing pin is in the incorrect installation orientation, and a guide portion that extends along the insertion direction of the insertion hole.

5. The roller blind according to claim 1, wherein the insertion restriction portion is attached to the side bracket in the vicinity of the bearing portion.

6. The roller blind according to claim 1, wherein the insertion restriction portion is formed integrally with the bearing portion.

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