Rolling screen

Abstract

To provide a rolling screen with enhanced safety where a fixing pin of a bifurcated shape, which is used to fix shanks of a winding part capable of lifting and lowering a screen to a side bracket, may not come off unintentionally.SOLUTION: A rolling screen comprises: a winding part 3 capable of lifting and lowering a screen; a pair of side brackets each having a pair of shaft bearing parts capable of respectively supporting a pair of shanks protruding from both end parts of the winding part 3; and a fixing pin 5 for fixing the shank 10 to the shaft bearing part 23. The fixing pin 5 has: a fold-back part 39; a linear first leg 40 which can be inserted into an insertion hole of the shank 10 and the shaft bearing part 23 respectively; and a second leg 41 on which a regulated part is formed. One side bracket 4 has a regulating part 26 for controlling the spread of the first leg 40 and the second leg 41 of the fixing pin 5 attached to the shank 10 and the shaft bearing part 23 as a result of being touched by the regulated part.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a roll screen.

Background Art

[0002] Conventionally, as disclosed in Patent Document 1 below, a roll screen is known that includes a winding pipe for winding a screen and a bracket having a bearing recess for supporting a shaft portion of the winding pipe. The shaft portion includes an engaging portion that is recessed in a direction intersecting the rotation axis of the winding pipe, and the bearing recess includes a wall portion that forms the bearing recess. The wall portion includes an insertion hole into which a fixing pin for fixing the shaft portion to the bearing recess is inserted, and the bearing recess includes a restricting portion that is displaced from a first state in which entry of the fixing pin from the insertion hole is restricted to a second state in which entry of the fixing pin is allowed. The restricting portion enables engagement of the fixing pin with the engaging portion in the second state.

[0003] According to such a configuration, since the restricting portion restricts the entry of the fixing pin unless the shaft portion of the winding pipe is accurately supported by the bracket, it is possible to prevent construction defects from occurring when attaching the shaft portion of the winding pipe to the bracket.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in a roll screen configured to fix the shaft portion of the winding pipe to the bracket using a fixing pin as described above, since the construction is easy, a split pin having a bifurcated shape may be used for the fixing pin.

[0006] However, when a split pin is used as the fixing pin, for example, when the end of the rolled-up screen abuts against the split pin, an external force is applied in a direction to expand the split pin, and there is a possibility that the split pin may accidentally come out. Therefore, even when a bifurcated fixing pin is used, a roll screen with improved safety that prevents the fixing pin from accidentally coming out is desired.

[0007] The present invention has been made in view of such problems, and when a bifurcated fixing pin is used to fix the shaft portion of the winding portion capable of raising and lowering the screen to the side brackets, an object of the present invention is to provide a roll screen with improved safety that prevents the fixing pin from accidentally coming out.

Means for Solving the Problems

[0008] The inventors of the present invention considered that the above problems can be solved by providing a configuration that restricts the expansion of the fixing pin when the rolled-up screen abuts against the fixing pin, and based on this, they invented a new roll screen as follows.

[0009] (1) The roll screen according to the present invention includes a winding portion 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 end portions of the winding portion, and at least one of one of the shaft portions and one of the bearing portions and the other of the shaft portions and the other of the bearing portions. A fixing pin that fixes the shaft portion to the bearing portion by being partially inserted into insertion holes formed so as to communicate with the shaft portion and the bearing portion; the fixing pin includes a folded-back portion, and a linear first leg portion extending from one end of the folded-back portion and insertable into the insertion holes of the shaft portion and the bearing portion respectively. A second leg portion extending from the other end of the folded-back portion and having a regulated portion formed in a part thereof; at least one of the pair of side brackets includes a base portion intersecting the axial direction of the winding portion, and a regulated portion provided upright from the base portion and contacting the regulated portion. And a regulating portion that restricts the expansion of the first leg portion and the second leg portion of the fixing pin attached to the shaft portion and the bearing portion.

[0010] (2) In the above (1), it is preferable that the restricting portion extends toward the winding portion side rather than the fixing pins fixed to the shaft portion and the bearing portion.

[0011] (3) In the above (1) or (2), it is preferable that the restricting portion has an inclined surface that inclines to guide the movement of the restricted portion at a position where the restricted portion abuts when the first leg portion is inserted into the insertion holes of the shaft portion and the bearing portion, respectively.

[0012] (4) In any one of the above (1) to (3), it is preferable that the bearing portion has a concave groove formed in a concave shape so as to guide the movement of the second leg portion at a position where the second leg portion passes when the first leg portion is inserted into the insertion holes of the shaft portion and the bearing portion, respectively.

[0013] (5) In any one of the above (1) to (4), it is preferable that one restricting portion is provided at either a position on the front side or the rear side of the bearing portion.

[0014] (6) In any one of the above (1) to (5), it is preferable that the restricted portion is formed by turning back the tip of the second leg portion.

Advantages of the Invention

[0015] The present invention is configured to restrict the expansion of the fixing pins when the wound screen abuts against the fixing pins. Therefore, when a bifurcated fixing pin is used to fix the shaft portion of the winding portion capable of raising and lowering the screen to the side bracket, a roll screen with improved safety that prevents the fixing pins from accidentally coming out can be provided.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Mode for Carrying Out the Invention

[0017] Hereinafter, modes for carrying out the present invention will be described with reference to the drawings.

[0018] As shown in FIG. 1, the roll screen 1 of the present embodiment is installed in an opening such as a window frame of a building, for example. The roll screen 1 is installed indoors partitioned by window glass or the like with respect to the outside of the building. As shown in FIGS. 1 to 3 and FIG. 8, the roll screen 1 of the present embodiment is an electric roll screen, and includes a winding portion 3 capable of raising and lowering the screen 2, a pair of side brackets 4, 4 capable of supporting both ends of the winding portion 3, and a pair of fixing pins 5, 5 for fixing both ends of the winding portion 3 to the pair of side brackets 4, 4, respectively. In this specification, in a state where the roll screen 1 is installed, the axial direction of the winding portion 3 is the left-right direction, the up-down direction, and the direction orthogonal to the left-right direction is the front-back direction. Also, with respect to the front-back direction, the indoor side is the front, and the outdoor side is the rear.

[0019] The winding unit 3 includes 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 with openings at both axial ends. The winding pipe 6 is attached so as to span between a pair of side brackets 4, 4 spaced apart in the left - right direction. In a state where the winding pipe 6 is attached to the pair of side brackets 4, 4, the winding pipe 6 is rotatable about its axis. The motor 7 is accommodated inside the winding pipe 6 at one axial end side of the winding pipe 6. In the illustrated example, the motor 7 is disposed at the left end inside the winding pipe 6. In a state where the motor 7 is disposed inside the winding pipe 6, the left end portion of the motor 7 protrudes leftward from the winding pipe 6.

[0020] The screen 2 is a shielding material and is provided so as to be windable and unwindable 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 the motor 7 inside the winding pipe 6. Specifically, the screen 2 can be wound around the winding pipe 6 by rotating the winding pipe 6 in one direction by the motor 7, and can be unwound from the winding pipe 6 by rotating the winding pipe 6 in the other direction by the motor 7. By driving the motor 7 in this way to raise and lower the screen 2, 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. When the control device is provided inside the winding pipe 6, the control device is provided, for example, on the side of the bearing unit 9 described later. When the control device is provided outside the winding pipe 6, the control device is provided, for example, inside the blind box. The roll screen 1 of the present 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] When lowering the screen 2, operating the lowering switch arranged on the remote controller outputs a lowering signal for lowering the screen 2 from the remote controller to the control device. 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 of unwinding the screen 2. When raising the screen 2, operating the raising switch arranged on the remote controller outputs a raising signal for raising the screen 2 from the remote controller to the control device. When the raising signal is input to the control device, the control device drives the motor 7 to rotate the winding pipe 6 in the winding direction of the screen 2. Note that although the roll screen 1 of the present embodiment is configured to be operated by a remote controller, it is not limited thereto. For example, the roll screen 1 may be configured to be operable by an operation switch provided on the wall surface of the building.

[0023] A pair of shaft portions 10 and 20 protrude from both end portions of the winding portion 3. Among the pair of shaft portions 10 and 20, the first shaft portion 10 protruding from one end portion of the winding portion 3 is provided at the end portion of the motor 7 in the winding pipe 6. In the present embodiment, as described above, the motor 7 is arranged at the left end portion in the winding pipe 6. In this case, the first shaft portion 10 is provided at the left end portion of the motor 7. The first shaft portion 10 protrudes leftward from the left end portion of the motor 7. In the illustrated example, the first shaft portion 10 is provided on an adapter 11 fixed to the motor 7. Therefore, the first shaft portion 10 is provided on the motor 7 by fixing the adapter 11 to the left end portion of the motor 7.

[0024] The first shaft portion 10 has a locking piece 12 protruding in a direction intersecting the axial direction of the first shaft portion 10 at its tip. As shown in FIGS. 3 and 5, the first shaft portion 10 has a shaft piece 13 protruding from one end portion of the winding portion 3, a fitting member 14 that can be fitted to the shaft piece 13, and a cylindrical member 15 for attaching the fitting member 14 to the shaft piece 13.

[0025] The shaft piece 13 has a columnar shape with a quadrangular cross-section orthogonal to its axial direction. The shaft piece 13 is provided on the adapter 11, and is provided at the left end of the motor 7 when the adapter 11 is attached to the motor 7. The shaft piece 13 protrudes leftward from the left end of the motor 7. An insertion hole 16 is formed in the shaft piece 13 along a direction orthogonal to its axial direction. The insertion hole 16 has a circular cross-section in a direction orthogonal to its axial direction and penetrates the shaft piece 13. One axial end of the insertion hole 16 opens to one of the four outer surfaces of the shaft piece 13. The other axial end of the insertion hole 16 opens to the other surface located on the opposite side of the one surface among the four outer surfaces of the shaft piece 13.

[0026] The fitting member 14 has a plate shape with a U-shape in side view, and has shaft-side open both-end pieces 17, 17 arranged apart from each other, and a central piece 18 connecting the ends of the shaft-side open both-end pieces 17, 17. Insertion holes 19 are respectively formed in the shaft-side open both-end pieces 17, 17. The insertion hole 19 of one shaft-side open both-end piece 17 has a circular cross-section in a direction orthogonal to its axial direction and penetrates the one shaft-side open both-end piece 17. The insertion hole 19 of the other shaft-side open both-end piece 17 has a circular cross-section in a direction orthogonal to its axial direction and penetrates the other shaft-side open both-end piece 17. The insertion hole 19 of one shaft-side open both-end piece 17 and the insertion hole 19 of the other shaft-side open both-end piece 17 are arranged on the same axis. The locking piece 12 described above is provided on the central piece 18. The locking piece 12 is formed at one end of the central piece 18 in a direction orthogonal to the direction in which the shaft-side open both-end pieces 17, 17 face each other.

[0027] The cylindrical member 15 is cylindrical and can be inserted into the insertion holes 16, 19 respectively formed so as to communicate the shaft piece 13 and the fitting member 14. In the present embodiment, the cylindrical member 15 is a spring pin, but is not limited thereto.

[0028] In the first shaft portion 10 configured as described above, with the shaft piece 13 disposed between the axially open both end pieces 17, 17 of the fitting member 14, the cylindrical member 15 is inserted into the insertion hole 16 of the shaft piece 13 and the insertion holes 19 of the axially open both end pieces 17, whereby the fitting member 14 is non - movably fitted to the shaft piece 13. In the state where the fitting member 14 is attached to the shaft piece 13, the locking piece 12 is located on the tip end side of the shaft piece 13. In the present embodiment, since the U - shaped fitting member 14 in side view is attached to the prismatic shaft piece 13, the outer surface of the first shaft portion 10 is square - shaft - shaped. Further, the locking piece 12 projects in a direction intersecting with any one of the surfaces of the outer surface of the first shaft portion 10.

[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 10 is provided. A drive ring is provided at the tip end of the output shaft of the motor 7. The drive ring is integrally rotatably attached to the output shaft of the motor 7. The drive ring is fixed to the inner peripheral surface of the winding pipe 6. With such a configuration, by driving the motor 7, the drive ring can be rotated, and by rotating the drive ring, the winding pipe 6 can be rotated.

[0030] Of the pair of shaft portions 10, 20, the second shaft portion 20 protruding from the other end of the winding portion 3 has an adjustable protruding length from the winding portion 3. As shown in FIG. 8, the second shaft portion 20 is provided in the bearing unit 9 disposed at the right end portion within the winding pipe 6. The second shaft portion 20 protrudes rightward from the right end portion of the bearing unit 9. The second shaft portion 20 is provided in the bearing unit 9 so as to be axially movable forward and backward.

[0031] The outer surface of the tip of the second shaft portion 20 has a square shaft shape. That is, the tip of the second shaft portion 20 has a columnar shape with a square cross-section orthogonal to its axial direction. An insertion hole 21 is formed in the tip of the second shaft portion 20 along a direction orthogonal to its axial direction. The insertion hole 21 has a circular cross-section in a direction orthogonal to its axial direction and penetrates the second shaft portion 20. One axial end portion of the insertion hole 21 opens to one of the four outer surfaces of the tip of the second shaft portion 20. The other axial end portion of the insertion hole 21 opens to the other surface located on the opposite side of the said one surface among the four outer surfaces of the tip of the second shaft portion 20. A rib 22 having a circular shape in side view is provided at the tip of the square shaft-shaped portion of the second shaft portion 20. The rib 22 extends outward from each of the four outer surfaces of the square shaft-shaped portion of the second shaft portion 20.

[0032] Although not shown, a support shaft extending from the second shaft portion 20 is provided in the case of the bearing unit 9. The support shaft rotatably supports the case of the bearing unit 9 via a ball bearing. With such a configuration, when the winding pipe 6 is rotated by driving the motor 7, the case of the bearing unit 9 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 bearing portions 23, 23 capable of supporting the pair of shaft portions 10, 20 of the winding portion 3 respectively. The pair of side brackets 4, 4 are fixed to a support body such as a ceiling surface in a state of being separated in the left-right direction. In the present embodiment, the pair of left and right side brackets 4, 4 have a symmetric configuration. Therefore, here, only the left side bracket 4 will be described, and the description of the right side bracket 4 will be omitted. As shown in FIGS. 3 and 4, the left side bracket 4 has a mounting portion 24 attached to a support body such as a ceiling surface, a base portion 25 intersecting the axial direction of the first shaft portion 10 and the axial direction of the winding portion 3, a bearing portion 23 provided on the base portion 25, and a restricting portion 26 provided on the base portion 25.

[0034] The mounting portion 24 is plate-shaped and has its plate surface oriented in the vertical direction. The mounting portion 24 is fixed to the supported body by means such as screws with the upper plate surface in contact with the supported body. A plate-shaped base portion 25 is provided at the left end of the mounting portion 24. The base portion 25 protrudes downward from the left end of the mounting portion 24 with its plate surface oriented in the horizontal direction. At the corner between the mounting portion 24 and the base portion 25, a rib 27 is provided to reinforce the corner formed by the mounting portion 24 and the base portion 25. In the present embodiment, the mounting portion 24 and the base portion 25 are integrally formed, but it is not limited thereto, and they may be separate members.

[0035] The bearing portion 23 is provided on the right plate surface of the base portion 25. The bearing portion 23 has a wall portion 28 provided on the base portion 25 and a pair of fixing portions 29, 29 for attaching the wall portion 28 to the base portion 25.

[0036] The wall portion 28 is capable of placing the aforementioned first shaft portion 10 thereon. In the illustrated example, the wall portion 28 is in the shape of a U-shaped plate in a side view with the front side open, and has receiving-side open end pieces 30, 30 arranged spaced apart from each other and a central piece 31 connecting the rear end portions of the receiving-side open end pieces 30, 30. Insertion holes 32 are respectively formed in the receiving-side open end pieces 30, 30. The insertion hole 32 of one of the receiving-side open end pieces 30 has a circular cross-section in a direction orthogonal to its axial direction and penetrates through one of the receiving-side open end pieces 30. The insertion hole 32 of the other receiving-side open end piece 30 has a circular cross-section in a direction orthogonal to its axial direction and penetrates through the other receiving-side open end piece 30. The insertion hole 32 of one of the receiving-side open end pieces 30 and the insertion hole 32 of the other receiving-side open end piece 30 are arranged on the same axis. Notch-shaped concave grooves 33 opening forward are respectively formed at the front end portions of the receiving-side open end pieces 30. The concave groove 33 is concave rearward. An opening 34 into which the locking piece 12 of the first shaft portion 10 can be inserted is formed in a part of the wall portion 28. This opening 34 is formed in a portion located on the rear side of the wall portion 28. Specifically, the opening 34 is formed in the central piece 31. Therefore, the left end portions of the receiving-side open end pieces 30, 30 extend leftward from the central piece 31.

[0037] The pair of fixing parts 29, 29 are each plate-shaped and provided on the receiving-side open both end pieces 30, 30 of the wall part 28. Among the pair of fixing parts 29, 29, the upper fixing part 29 is provided on the upper receiving-side open both end piece 30. The upper fixing part 29 extends upward from the upper receiving-side open both end piece 30 with the plate surface facing left and right. A through hole 35 penetrating in the left-right direction is formed in the upper fixing part 29. Among the pair of fixing parts 29, 29, the lower fixing part 29 is provided on the lower receiving-side open both end piece 30. The lower fixing part 29 extends downward from the lower receiving-side open both end piece 30 with the plate surface facing left and right. A through hole 35 penetrating in the left-right direction is formed in the lower fixing part 29.

[0038] With such a configuration, one bearing part 23 is detachably attached to the base part 25 by screwing a screw 37 into the screw hole 36 of the base part 25 through the through holes 35 of the pair of fixing parts 29, 29 in a state where the left plate surfaces of the pair of fixing parts 29, 29 are in contact with the right plate surface of the base part 25. In a state where one bearing part 23 is fixed to the base part 25, the wall part 28 stands up from the base part 25. As described above, the left end parts of the receiving-side open both end pieces 30, 30 extend further to the left than the central piece 31. Therefore, in a state where one bearing part 23 is fixed to the base part 25, the opening 34 formed in the central piece 31 is located in the gap between the right surface of the base part 25 and the left end part of the central piece 31.

[0039] The restricting portion 26 is provided so as to stand up from the base portion 25. In the illustrated example, the restricting portion 26 is plate-shaped and is provided at the front end portion of the fixing portion 29 located on the upper side. The restricting portion 26 extends rightward from the front end portion of the fixing portion 29 located on the upper side with the plate surface facing front and rear. Specifically, the restricting portion 26 extends rightward of the insertion hole 32 of the receiving-side open both-end pieces 30. The restricting portion 26 has an inclined surface 38 at the lower end portion on the tip side. The inclined surface 38 faces diagonally downward to the right. Further, the upper end portion of the restricting portion 26 is inclined so as to face forward of the lower end portion. The fixing portion 29 located on the upper side extends forward of the wall portion 28. Therefore, the restricting portion 26 provided at the front end portion of the fixing portion 29 located on the upper side is located on the front side of the wall portion 28 of the bearing portion 23.

[0040] Both axial end portions of the winding portion 3 are fixed to the pair of side brackets 4, 4 by the pair of fixing pins 5, 5. The pair of fixing pins 5, 5 have the same configuration. Therefore, the fixing pin 5 for fixing the left end portion of the winding portion 3 to the left side bracket 4 will be described, and the description of the fixing pin 5 for fixing the right end portion of the winding portion 3 to the right side bracket 4 will be omitted.

[0041] As shown in FIG. 6, one fixing pin 5 is a bifurcated snap pin and has a folding-back portion 39, a first leg portion 40 extending from one end of the folding-back portion 39, and a second leg portion 41 extending from the other end of the folding-back portion 39. The folding-back portion 39 is formed by folding a wire. The first leg portion 40 is linear and can be inserted into the insertion holes 16, 19, 32 formed in the first shaft portion 10 and the bearing portion 23, that is, the cylindrical member 15 communicating these insertion holes 16, 19 and the insertion hole 32. The second leg portion 41 extends in the same direction as the direction in which the first leg portion 40 extends. A restricted portion 42 that abuts against the restricting portion 26 provided on the base portion 25 is formed in a part of the second leg portion 41. Typically, the second leg portion 41 has a bent portion 43 provided at the other end of the folding-back portion 39, a curved portion 44 provided at the tip of the bent portion 43, and a restricted portion 42 provided at the tip of the curved portion 44.

[0042] The bent portion 43 is formed by folding back the wire rod. The bent portion 43 extends from the folded-back portion 39 toward the first leg portion 40. The curved portion 44 extends in the same direction as the extending direction of the first leg portion 40 from the tip of the bent portion 43. The curved portion 44 is curved so as to bulge in a direction away from the first leg portion 40. The regulated portion 42 is formed by folding back the tip of the second leg portion 41. The tip of the second leg portion 41 extends obliquely away from the first leg portion 40 and is folded back in a direction away from the first leg portion 40. In this way, the fixing pin 5 is formed by appropriately bending the wire rod. Note that the other fixing pin 5 fixes the right end portion of the winding portion 3 to the right side bracket 4. Therefore, the first leg portion 40 of the other fixing pin 5 can be inserted into the insertion holes 21 and 32 formed in the second shaft portion 20 and the bearing portion 23, respectively.

[0043] Next, with reference to FIGS. 7 to 9, the procedure for installing the winding portion 3 between the pair of left and right side brackets 4, 4 will be described. The pair of left and right side brackets 4, 4 are attached to a support body such as a ceiling surface in a state of being separated in the left-right direction. The side bracket 4 located on the left side is attached to the support body by screwing a screw into the support body through the attachment portion 24 with the attachment portion 24 in contact with the support body. In a state where the side bracket 4 located on the left side is attached to the support body, the attachment portion 24 extends rightward from the base portion 25. The side bracket 4 located on the right side is attached to the support body by screwing a screw into the support body through the attachment portion 24 with the attachment portion 24 in contact with the support body. In a state where the side bracket 4 located on the right side is attached to the support body, the attachment portion 24 extends leftward from the base portion 25.

[0044] To install the winding unit 3 on the pair of side brackets 4, 4 attached to the support in this way, after assembling the first shaft portion 10, as shown in FIG. 8(a), the second shaft portion 20 is attached to the bearing portion 23 of the right side bracket 4. At this time, the second shaft portion 20 is attached to the bearing portion 23 such that the insertion hole 21 of the second shaft portion 20 and the insertion hole 32 of the bearing portion 23 communicate with each other. In a state where the second shaft portion 20 is attached to the bearing portion 23, the rib 22 of the second shaft portion 20 is locked to the opening portion 34 of the bearing portion 23.

[0045] As described above, the second shaft portion 20 is configured to be able to adjust the protruding amount from the winding pipe 6. Therefore, by moving the winding pipe 6 to the left, the second shaft portion 20 is pulled out from inside the winding pipe 6, and the protruding amount from the winding pipe 6 increases. In this way, while moving the winding pipe 6 to the left as shown in FIG. 8(b), the first shaft portion 10 is attached to the bearing portion 23 of the side bracket 4 located on the left side. At this time, the first shaft portion 10 is attached to the bearing portion 23 such that the insertion holes 16, 19 of the first shaft portion 10 and the insertion hole 32 of the bearing portion 23 communicate with each other. That is, the insertion hole 16 of the shaft piece 13, the insertion hole 19 of the fitting member 14, and the insertion hole 32 of the bearing portion 23 communicate with each other. In a state where the first shaft portion 10 is attached to the bearing portion 23 of the side bracket 4 located on the left side, the locking piece 12 of the first shaft portion 10 is inserted into the opening portion 34 of the bearing portion 23. In the case of the first shaft portion 10, in this way, the shaft piece 13 is supported by one bearing portion 23 with the fitting member 14 fitted. Therefore, even when a force to move the winding pipe 6 in the direction of the arrow shown in FIG. 8(b) (i.e., the right direction) is applied in a state where the shaft portions 10, 20 are attached to the bearing portion 23, the locking piece 12 is locked to the opening portion 34, so that the movement of the first shaft portion 10 is restricted and it is maintained in a state of being placed on the bearing portion 23, and the fall of the winding pipe 6 during construction can be suppressed.

[0046] After the first shaft portion 10 is attached to the bearing portion 23 of the side bracket 4 located on the left side, the first shaft portion 10 is fixed to the bearing portion 23 by the fixing pin 5, and the second shaft portion 20 is also fixed to the bearing portion 23 by the fixing pin 5. When the first shaft portion 10 is fixed to the bearing portion 23, the first leg portion 40 of the fixing pin 5 is inserted into the insertion hole 16 of the shaft piece 13, the insertion hole 19 of the fitting member 14, and the insertion hole 32 of the bearing portion 23. Specifically, it is as shown in FIG. 9.

[0047] As shown in FIG. 9(a), the first leg portion 40 of the fixing pin 5 is inserted downward into the insertion hole 32 of the receiving-side open-ended piece 30 located on the lower side. Then, as shown in FIG. 9(b), the first leg portion 40 of the fixing pin 5 is inserted in the order of the insertion hole 19 of the shaft-side open-ended piece 17 located on the lower side, the insertion hole 16 of the shaft piece 13, the insertion hole 19 of the shaft-side open-ended piece 17 located on the upper side, and the insertion hole 32 of the receiving-side open-ended piece 30 located on the upper side. When the first leg portion 40 of the fixing pin 5 is inserted into the insertion hole 16 of the shaft piece 13 and the insertion hole 19 of the shaft-side open-ended piece 17, the first leg portion 40 of the fixing pin 5 is inserted into the cylindrical member 15. When the first leg portion 40 of the fixing pin 5 is inserted into each of the insertion holes 16, 19, 32 in this way, the restricted portion 42 of the fixing pin 5 comes into contact with the restricting portion 26. As described above, the restricting portion 26 has an inclined surface 38. Therefore, when the first leg portion 40 of the fixing pin 5 is inserted into each of the insertion holes 16, 19, 32, as shown in FIG. 9(c), the restricted portion 42 of the fixing pin 5 comes into contact with the inclined surface 38 and moves upward while being pushed to the right. Then, as shown in FIG. 9(d), when the first leg portion 40 of the fixing pin 5 is further inserted into each of the insertion holes 16, 19, 32, the restricted portion 42 of the fixing pin 5 is located behind the restricting portion 26 after overcoming the restricting portion 26. In this way, a part of the fixing pin 5 is inserted into and attached to the insertion holes 16, 19, 32 formed so as to communicate the first shaft portion 10 and the bearing portion 23 respectively, whereby the first shaft portion 10 can be fixed to the bearing portion 23. Note that the step of fixing the second shaft portion 20 to the bearing portion 23 by the fixing pin 5 may be performed before the first shaft portion 10 is completely attached to the bearing portion 23.

[0048] When the first leg portion 40 of the fixing pin 5 is inserted into each of the insertion holes 16, 19, and 32, the second leg portion 41 of the fixing pin 5 passes through the concave groove 33 formed in the receiving-side open both-end pieces 30 of the bearing portion 23. Therefore, the bearing portion 23 has a concave groove 33 formed in a concave shape so as to guide the movement of the second leg portion 41 at a position where the second leg portion 41 passes when the first leg portion 40 is inserted into the insertion holes 16, 19, and 32 of the first shaft portion 10 and the bearing portion 23, respectively. When the first leg portion 40 of the fixing pin 5 is inserted into each of the insertion holes 16, 19, and 32, the regulated portion 42 of the fixing pin 5 overrides the regulating portion 26 by the action of the inclined surface 38. Therefore, the regulating portion 26 has an inclined surface 38 that is inclined so as to guide the movement of the regulated portion 42 at a position where the regulated portion 42 abuts when the first leg portion 40 is inserted into the insertion holes 16, 19, and 32 of the first shaft portion 10 and the bearing portion 23, respectively.

[0049] The procedure for fixing the second shaft portion 20 to the bearing portion 23 of the side bracket 4 located on the right side is the same as the procedure for fixing the first shaft portion 10 to the bearing portion 23. Specifically, it is as follows. When the second shaft portion 20 is fixed to the bearing portion 23, the first leg portion 40 of the fixing pin 5 is inserted in the order of the insertion hole 32 of the receiving-side open both-end piece 30 located on the lower side, the insertion hole 21 of the second shaft portion 20, and the insertion hole 32 of the receiving-side open both-end piece 30 located on the upper side. At this time, the second leg portion 41 of the fixing pin 5 passes through the concave groove 33 formed in the receiving-side open both-end pieces 30, 30 of the bearing portion 23, and the regulated portion 42 of the fixing pin 5 overrides the regulating portion 26 by the action of the inclined surface 38 of the regulating portion 26.

[0050] Next, the regulating portion 26 will be described with reference to FIGS. 10 and 11. As described above, the regulating portion 26 of the side bracket 4 located on the left side extends to the right of the insertion hole 32 of the receiving-side open both-end piece 30. Therefore, the regulating portion 26 extends to the side of the winding portion 3 beyond the fixing pin 5 fixed to the first shaft portion 10 and the bearing portion 23. The regulating portion 26 of the side bracket 4 located on the right side extends to the left of the insertion hole 32 of the receiving-side open both-end piece 30. Therefore, the regulating portion 26 extends to the side of the winding portion 3 beyond the fixing pin 5 fixed to the second shaft portion 20 and the bearing portion 23.

[0051] As shown in Fig. 11, when the end of the screen 2 with winding disorder is biased to the left, the end of the screen 2 can be prevented from contacting the fixed pin 5 by contacting the tip of the restricting portion 26 of the side bracket 4 located on the left side. Although not shown, when the end of the screen 2 with winding disorder is biased to the right, the end of the screen 2 can be prevented from contacting the fixed pin 5 by contacting the tip of the restricting portion 26 of the side bracket 4 located on the right side.

[0052] When the end of the screen 2 with winding disorder is biased to the left and the end of the screen 2 contacts the fixed pin 5 to apply an external force, the restricted portion 42 of the fixed pin 5 contacts the restricting portion 26 of the left side bracket 4, thereby suppressing the movement of the second leg portion 41 of the fixed pin 5. In particular, since the upper end of the restricting portion 26 is inclined so as to face forward of the lower end, the expansion and downward movement of the restricted portion 42 are restricted (see Fig. 10). Also, when the end of the screen 2 with winding disorder is biased to the right and the end of the screen 2 contacts the fixed pin 5 to apply an external force, the restricted portion 42 of the fixed pin 5 contacts the restricting portion 26 of the right side bracket 4, thereby suppressing the movement of the second leg portion 41 of the fixed pin 5. In this way, when the restricted portion 42 abuts against the restricting portion 26, the expansion of the first leg portion 40 and the second leg portion 41 of the fixed pin 5 attached to the shaft portions 10, 20 and the bearing portion 23 is restricted.

[0053] In the case of the roll screen 1 of this embodiment, the forked fixed pin 5 is restricted from expanding in the attached state. Therefore, according to the roll screen 1 of this embodiment, even if an external force in the direction of expanding the fixed pin 5 is applied, it is possible to prevent the fixed pin 5 from inadvertently coming off.

[0054] In the case of the roll screen 1 of this embodiment, even if winding disorder occurs in the screen 2, the end of the screen 2 is prevented from abutting against the fixed pin 5. Therefore, according to the roll screen 1 of this embodiment, since the external force associated with the winding disorder of the screen 2 is not applied to the fixed pin 5, the safety can be further improved.

[0055] In the case of the roll screen 1 of the present embodiment, the restricting portion 26 has an inclined surface 38. Therefore, according to the roll screen 1 of the present embodiment, when attaching the fixing pin 5, the restricted portion 42 of the second leg portion 41 can easily cross over the restricting portion 26, so that the workability when attaching the fixing pin 5 can be improved.

[0056] In the case of the roll screen 1 of the present embodiment, the inclination of the fixing pin 5 in the axial direction is restricted by the concave groove 33. Therefore, according to the roll screen 1 of the present embodiment, the fixing pin 5 can be easily inserted, so that the workability when attaching the fixing pin 5 can be improved. Also, the fixing pin 5 can be attached so that the restricted portion 42 of the second leg portion 41 and the restricting portion 26 overlap in the axial direction.

[0057] In the case of the roll screen 1 of the present embodiment, by visually recognizing the position of the restricting portion 26, the direction of attaching the fixing pin 5 can be easily determined. Therefore, according to the roll screen 1 of the present embodiment, it is possible to prevent the fixing pin 5 from being attached in the wrong direction.

[0058] According to the roll screen 1 of the present embodiment, the restricted portion 42 is formed by folding back the tip of the second leg portion 41. Therefore, according to the roll screen 1 of the present embodiment, the restricted portion 42 can be easily formed.

[0059] Next, with reference to FIGS. 12 and 13, the roll screen 1a according to the first modification of the present embodiment will be described. Components having the same reference numerals as those in the above embodiment may have the same functions, and thus the description may be omitted below. In the first modification, the configuration of the first shaft portion 10 is different from that of the above embodiment.

[0060] In the case of the first shaft portion 10 of the first modification example, the locking piece 12 is integrally formed with the first shaft portion 10. The first shaft portion 10 has a columnar shape with a quadrangular cross section perpendicular to its axial direction. The first shaft portion 10 is provided on the adapter 11, and is provided at the left end portion of the motor 7 by attaching the adapter 11 to the motor 7. The first shaft portion 10 protrudes leftward from the left end portion of the motor 7. An insertion hole 45 is formed in the first shaft portion 10 along a direction perpendicular to its axial direction. The insertion hole 45 has a circular cross section in a direction perpendicular to its axial direction and penetrates the first shaft portion 10. One axial end portion of the insertion hole 45 opens to one of the four outer surfaces of the first shaft portion 10. The other axial end portion of the insertion hole 45 opens to the other surface located on the opposite side of the one surface among the four outer surfaces of the first shaft portion 10. A locking piece 12 is integrally formed at the tip of the first shaft portion 10. The locking piece 12 protrudes from the first shaft portion 10 in a direction intersecting the axial direction of the first shaft portion 10.

[0061] In the case of the first modification example 1, to attach the winding portion 3 to the side bracket 4, the first shaft portion 10 integrally formed with the locking piece 12 may be attached to the bearing portion 23. At this time, the insertion hole 45 of the first shaft portion 10 and the insertion hole 32 of the bearing portion 23 communicate with each other. In a state where the first shaft portion 10 is attached to the bearing portion 23, the locking piece 12 is inserted into the opening 34 of the bearing portion 23. When fixing the first shaft portion 10 to the bearing portion 23, as described above, the fixing pin 5 is used. In the first modification example 1, the first leg portion 40 of the fixing pin 5 is inserted in the order of the insertion hole 32 of the receiving-side open both-end piece 30 located on the lower side, the insertion hole 45 of the first shaft portion 10, and the insertion hole 32 of the receiving-side open both-end piece 30 located on the upper side.

[0062] Next, with reference to FIG. 14, the roll screen 1b according to the second modification example of the present embodiment will be described. Note that components having the same reference numerals as those in the above embodiment may have the same operations, and thus the description may be omitted hereinafter. Here, the restricting portion 26 provided on the side bracket 4 located on the left side will be described. Note that the side bracket 4 located on the right side is symmetric with the side bracket 4 located on the left side, and thus the description thereof is omitted.

[0063] In the second modification example, the configuration of the restricting portion 26 is different from that of the above-described embodiment. Specifically, the restricting portion 26 of the second modification example is located on the rear side of the wall portion 28 of the bearing portion 23. Therefore, the rear end portion of the fixing portion 29 located on the upper side extends rearward beyond the wall portion 28. The restricting portion 26 is provided at the rear end portion of the fixing portion 29 located on the upper side. In this way, the restricting portion 26 is provided so as to stand up from the base portion 25. According to the above-described embodiment and the second modification example, in the side bracket 4, the restricting portion 26 may be provided at any one position on the front side or the rear side of the bearing portion 23.

[0064] In the case of the second modification example, in the same manner as in the above-described embodiment, the first shaft portion 10 is fixed to the bearing portion 23 by the fixing pin 5. However, in the second modification example, as shown in FIG. 14, the second leg portion 41 of the fixing pin 5 is located behind the wall portion 28. Therefore, in the second modification example, when the fixing pin 5 is inserted into the respective insertion holes 16, 19, 32, the second leg portion 41 of the fixing pin 5 moves along the rear end portion of the wall portion 28. Therefore, the pair of concave grooves 33, 33 are formed vertically spaced apart from each other at the rear end portion of the wall portion 28. Note that the wall portion 28 may not have the concave groove 33. In a state where the first shaft portion 10 is fixed to the bearing portion 23 by the fixing pin 5, the restricting portion 26 is located on the rear side of the restricted portion 42 of the fixing pin 5.

[0065] Next, with reference to FIG. 15, a roll screen 1c according to a third modification example of the present embodiment will be described. Note that components having the same reference numerals as those in the above-described embodiment may have the same operations, and thus the description thereof may be omitted hereinafter. Here, the restricting portion 26 provided in the side bracket 4 located on the left side will be described. Note that the side bracket 4 located on the right side is symmetrical to the side bracket 4 located on the left side, and thus the description thereof will be omitted.

[0066] In the third modification example, the configuration of the restricting portion 26 is different from that of the above-described embodiment. Specifically, the restricting portion 26 has a screw 46 and a nut 47. The screw 46 is screwed into a screw hole 36 formed in the base portion 25. At this time, the threaded portion protruding from the head of the screw 46 protrudes from the base portion 25 toward the winding portion 3 side. The nut 47 is screwed onto the threaded portion. Thereby, the restricting portion 26 is attached to the base portion 25 of the side bracket 4. The restricting portion 26 of the third modification example is located on the front side of the wall portion 28 of the bearing portion 23.

[0067] Next, with reference to FIG. 16, the roll screen 1d according to the fourth modification example of the present embodiment will be described. Note that components having the same reference numerals as those in the above-described embodiment may have the same operations, and thus the description thereof may be omitted hereinafter. Here, the restricting portion 26 provided in the side bracket 4 located on the left side will be described. Note that the side bracket 4 located on the right side is symmetrical to the side bracket 4 located on the left side, and thus the description thereof will be omitted.

[0068] In the fourth modification example, the configuration of the restricting portion 26 is different from that of the above-described embodiment. Specifically, the restricting portion 26 has a screw 46 and a nut 47. The screw 46 is screwed into a screw hole 36 formed in the base portion 25. At this time, the threaded portion protruding from the head of the screw 46 protrudes from the base portion 25 toward the winding portion 3 side. The nut 47 is screwed onto the threaded portion. Thereby, the restricting portion 26 is attached to the base portion 25 of the side bracket 4. The restricting portion 26 of the fourth modification example is located on the rear side of the wall portion 28 of the bearing portion 23. Therefore, the fixing pin 5 is inserted into the respective insertion holes 16, 19, 32 in the same manner as in the case of the second modification example. Accordingly, the second leg portion 41 of the fixing pin 5 is located on the rear side of the wall portion 28.

[0069] Note that the present invention is not limited to the above-described embodiment, and modifications and improvements within the scope that can achieve the object of the present invention are included in the present invention.

[0070] For example, in the above embodiment, both ends of the winding portion 3 are fixed to the bearing portion 23 by the fixing pins 5, but the present invention is not limited thereto. Of both ends of the winding portion 3, one end 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 10 and one bearing portion 23, and the second shaft portion 20 and the other bearing portion 23. Therefore, the restricting portion 26 may be provided on at least one of the pair of side brackets 4.

Explanation of Signs

[0071] 1 Roll screen 2 Screen 3 Winding portion 4 Side bracket 5 Fixing pin 10 First shaft portion 16 Insertion hole 19 Insertion hole 20 Second shaft portion 21 Insertion hole 23 Bearing portion 25 Base portion 26 Restricting portion 32 Insertion hole 33 Concave groove 38 Inclined surface 39 Folded-back portion 40 First leg portion 41 Second leg portion 42 Restricted portion

Claims

1. A winding section capable of raising and lowering a screen, A pair of side brackets each having a pair of bearing sections capable of supporting a pair of shaft sections protruding from both end portions of the winding section, At least one of one of the shaft sections and one of the bearing sections and the other of the shaft sections and the other of the bearing sections is attached by inserting a part thereof into insertion holes formed so as to communicate the shaft section and the bearing section, thereby fixing the shaft section to the bearing section. A fixing pin, The fixing pin has a folded-back portion, a linear first leg portion extending from one end of the folded-back 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-back portion and having a regulated portion formed in a part thereof. And, At least one of the pair of side brackets has a base portion intersecting the axial direction of the winding section, and the first leg portion and the second leg portion of the fixing pin attached to the shaft portion and the bearing portion by standing up from the base portion and contacting the regulated portion. A roll screen having a regulating portion for regulating the expansion.

2. The regulating portion extends to the side of the winding section rather than the fixing pin fixed to the shaft portion and the bearing portion. The roll screen according to claim 1.

3. The regulating portion has an inclined surface that is inclined so as to guide the movement of the regulated portion at a position where the regulated portion contacts when the first leg portion is inserted into the insertion holes of the shaft portion and the bearing portion. The roll screen according to claim 1.

4. The bearing portion has a concave groove formed in a concave shape so as to guide the movement of the second leg portion at a position where the second leg portion passes when the first leg portion is inserted into the insertion holes of the shaft portion and the bearing portion. The roll screen according to claim 1.

5. The regulating portion is provided at one position either on the front side or the rear side of the bearing portion. The roll screen according to claim 1.

6. The regulated portion is formed by folding back the tip of the second leg portion. The roll screen according to claim 1.

Images