Solar shading device, cord guide, method for manufacturing a solar shading device

Abstract

To provide a solar radiation shielding device that can improve production efficiency. [Solution] The solar radiation shielding device 1 comprises a shielding material, a drive shaft for driving the shielding material, a headbox 100 for housing the drive shaft, a pulley 302 that can rotate the drive shaft, unit cases 301 and 305 that are mounted inside the headbox and rotatably support the pulley, a notch 101 provided in the headbox, an operating cord that is locked to the pulley and discharged from the notch, and a cord guide 310 provided in the notch for guiding the operating cord. The cord guide has first fixing parts 311 and 312 that can be fixed to the notch, and a second fixing part 313 that can be fixed to the unit case.

Description

Technical Field

[0001] The present invention relates to a solar radiation shielding device, a cord guide, and a method for manufacturing a solar radiation shielding device.

Background Art

[0002] Conventionally, in a solar radiation shielding device, a cord guide (cord gate) serving as an exit for a cord is known to be attached to a head box having a cord insertion portion (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the conventional technology, the assembly procedure of the operation unit where the cord guide is provided is as follows: after inserting the operation unit from the end of the side surface of the head box, the cord guide is attached to the head box, and the set pin is inserted and attached to the cord guide.

[0005] However, in the conventional technology, the following points have been troublesome for the assembly worker. First, in the conventional technology, there was the trouble of moving the operation unit inserted from the end of the side surface of the head box horizontally to a designated position. Also, in the conventional technology, there was the trouble of finely adjusting the position of the operation unit when attaching the cord gate to the head box. Furthermore, in the conventional technology, the work of inserting the set pin into the cord gate required aiming at the set pin insertion hole from the upper surface of the head box. Therefore, in a solar radiation shielding device, it is desired to reduce the assembly man-hours and improve the production efficiency.

[0006] Therefore, the present invention has been made in view of the above problems, and one of its objectives is to provide a solar radiation shielding device that can improve production efficiency. [Means for solving the problem]

[0007] The above objective is achieved by the present invention as described below. Specifically, the solar radiation shielding device of the present invention comprises a shielding material, a drive shaft for driving the shielding material, a headbox housing the drive shaft, a pulley rotatable for the drive shaft, a unit case mounted inside the headbox and rotatably supporting the pulley, a notch provided in the headbox, an operating cord engaged with the pulley and discharged from the notch, and a cord guide provided in the notch for guiding the operating cord, wherein the cord guide has a first fixing part that can be fixed to the notch and a second fixing part that can be fixed to the unit case.

[0008] In the present invention, the second fixing portion may be fixed to the unit case to suppress the movement of the cord guide.

[0009] In the present invention, the second fixing portion may be fixed to the unit case to suppress movement of the unit case in the longitudinal direction.

[0010] In the present invention, the unit case has a locking portion that engages with the headbox, and the locking portion may restrict the movement of the unit case in the vertical direction.

[0011] In the present invention, the second fixing portion may suppress the movement of the cord guide in the vertical direction.

[0012] In the present invention, the cord guide is a cord guide provided in a notch in a headbox that houses a unit case and guides an operating cord, and has a first fixing part that can be fixed to the notch and a second fixing part that can be fixed to the unit case.

[0013] The present invention relates to a method for manufacturing a solar radiation shielding device comprising: a headbox housing a drive shaft for driving a shielding material; a unit case mounted inside the headbox and rotatably supporting a pulley capable of rotating the drive shaft; a notch provided in the headbox; and a cord guide provided in the notch for guiding an operating cord discharged from the notch, comprising the steps of: fixing the cord guide to the notch of the headbox; inserting the unit case from the upper side of the headbox; and fixing the second fixing portion of the cord guide to the unit case. [Effects of the Invention]

[0014] According to the present invention, a solar radiation shielding device that can improve production efficiency can be realized. [Brief explanation of the drawing]

[0015] [Figure 1] This is a front view showing the overall configuration of a solar radiation shielding device according to an embodiment of the present invention. [Figure 2] This is a side view showing the overall configuration of the solar radiation shielding device according to this embodiment. [Figure 3] This is a cross-sectional view AA showing the internal structure of the headbox of the solar radiation shielding device according to this embodiment. [Figure 4] This is an exploded perspective view showing the configuration of the operating unit in the solar radiation shielding device according to this embodiment. [Figure 5] This is an exploded perspective view showing the configuration of the tilt unit in the solar radiation shielding device according to this embodiment. [Figure 6] This is a cross-sectional view AA showing the internal structure of the tilt unit of the solar radiation shielding device according to this embodiment. [Figure 7] This is a cross-sectional view showing the internal structure of the tilt unit of the solar radiation shielding device according to this embodiment. [Figure 8]It is a side view schematically showing the tilt state of the slats in the solar radiation shielding device according to this embodiment. [Figure 9] It is a side view schematically showing the tilt state of the slats in the solar radiation shielding device according to this embodiment. [Figure 10] It is a cross-sectional view showing the tilt unit and the cord guide in the solar radiation shielding device according to this embodiment. [Figure 11] It is a perspective view showing the fitting portion of the cord guide in the tilt unit of the solar radiation shielding device according to this embodiment. [Figure 12] It is a first front view explaining the assembly procedure of the solar radiation shielding device according to this embodiment. [Figure 13] It is a second front view explaining the assembly procedure of the solar radiation shielding device according to this embodiment. [Figure 14] It is a third front view explaining the assembly procedure of the solar radiation shielding device according to this embodiment. [Figure 15] It is a side view showing the cord guide temporarily fixed to the head box in the assembly procedure of the solar radiation shielding device according to this embodiment. [Figure 16] It is a side view showing the cord guide temporarily fixed to the head box in the assembly procedure of the solar radiation shielding device according to this embodiment. [Figure 17] It is a fourth front view explaining the assembly procedure of the solar radiation shielding device according to this embodiment. [Figure 18] It is a fifth front view explaining the assembly procedure of the solar radiation shielding device according to this embodiment. [Figure 19] It is a sixth front view explaining the assembly procedure of the solar radiation shielding device according to this embodiment. [Figure 20] It is a seventh front view explaining the assembly procedure of the solar radiation shielding device according to this embodiment.

Mode for Carrying Out the Invention

[0016] 1. Outline of the Embodiment First, a general overview of a typical embodiment of the present invention will be given. In the following description, reference numerals on the drawings corresponding to the components of the invention are indicated in parentheses as an example.

[0017] [1] A solar radiation shielding device (1) comprising: a shielding material (10, 13); a drive shaft (60) for driving the shielding material; a head box (100) for housing the drive shaft; a pulley (302) for rotatable operation of the drive shaft; a unit case (301, 305) mounted inside the head box and supporting the pulley rotatably; a notch (101) provided in the head box; an operating cord (80) that is engaged with the pulley and discharged from the notch; and a cord guide (310) provided in the notch for guiding the operating cord, wherein the cord guide has a first fixing part (311, 312) that can be fixed to the notch and a second fixing part (313) that can be fixed to the unit case.

[0018] [2] The solar radiation shielding device according to [1], wherein the second fixing part is fixed to the unit case to suppress the movement of the cord guide.

[0019] [3] The solar radiation shielding device according to [1] or [2], wherein the second fixing part is fixed to the unit case to suppress movement of the unit case in the longitudinal direction.

[0020] [4] The solar radiation shielding device according to [3], wherein the unit case has a locking portion (321) that locks to the head box, and the locking portion restricts the movement of the unit case in the vertical direction.

[0021] [5] The solar radiation shielding device according to any one of [1] to [4], wherein the second fixing part suppresses the movement of the cord guide in the vertical direction.

[0022] [6] A cord guide (310) provided in a notch (101) in a headbox (100) housing unit cases (301, 305) for guiding an operating cord (80), the cord guide having a first fixing part (311, 312) that can be fixed to the notch and a second fixing part (313) that can be fixed to the unit case.

[0023] [7] A method for manufacturing a solar shading device comprising: a headbox (100) housing a drive shaft (60) for driving shielding materials (10, 13); unit cases (301, 305) mounted inside the headbox and rotatably supporting a pulley (302) capable of rotating the drive shaft; a notch (101) provided in the headbox; and a cord guide (310) provided in the notch for guiding an operating cord (80) discharged from the notch, the method for manufacturing a solar shading device comprising the steps of: fixing the cord guide to the notch of the headbox; inserting the unit case from the upper side of the headbox; and fixing the second fixing portion (313) of the cord guide to the unit case.

[0024] 2. Embodiments of the present invention Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

[0025] Figure 1 is a front view showing the overall configuration of a solar shading device 1 according to an embodiment of the present invention. Figure 2 is a side view showing the overall configuration of the solar shading device 1. Figure 3 is a cross-sectional view AA showing the internal structure of the headbox 100 of the solar shading device 1.

[0026] In the following description, the solar shading device 1 according to this embodiment is installed near the upper edge of a window frame (not shown). Furthermore, the solar shading device 1 according to this embodiment will be described as a blind that opens and closes slats, which are an example of a shading material.

[0027] The solar radiation shielding device 1 is, for example, a cover that is fixed to a window frame or the wall around the window, and allows visibility from inside to the outside, prevents visibility from outside to the inside, allows light and wind to enter the room, or prevents light and wind from entering the room.

[0028] For the sake of explanation, the direction in which the headbox 100 of the solar shading device 1 extends will be referred to as the longitudinal direction (left-right direction) LR. In the longitudinal direction LR, for example, in Figure 1 as seen from the indoor side, the left side will be referred to as "left side L" and the right side as "right side R". Furthermore, the direction in which the shading materials 10 and 13 hang down or move up and down relative to the headbox 100 will be referred to as the vertical direction (hanging direction, vertical direction) UD. In the vertical direction UD, the side of the headbox 100 will be referred to as "upper side U" and the side moving away from the headbox 100 downwards will be referred to as "lower side D". Furthermore, the direction intersecting the longitudinal direction LR and the vertical direction UD will be referred to as the short direction (front-back direction) FB. In the short direction, for example, the indoor side will be referred to as "front side F" and the outdoor side as "rear side B".

[0029] As shown in Figures 1 to 3, the sunshade device 1 includes a headbox 100, slats 10, lifting cords 11, ladder cords 12, bottom rails 13, operating unit 20, tilt unit 30, winding drum unit 40, lifting shaft (drive shaft) 50, tilt shaft (drive shaft) 60, lifting operation cord (operating cord) 70, tilt operation cord (operating cord) 80, and the like.

[0030] The headbox 100 is formed in the shape of a long enclosure with an internal storage space. The headbox 100 is attached to a mounting target, such as a window frame or a wall around a window, via brackets. An operating unit 20 is attached to one end of the headbox 100 in the longitudinal direction LR (right side R in Figure 1). To the left L of the operating unit 20 in the longitudinal direction LR of the headbox 100 are housed a tilt unit 30, a winding drum unit 40, a lifting shaft 50, and a tilt shaft 60. Note that the headbox 100 is not limited to an enclosure shape. The operating unit 20 can also be mounted on the outside of the headbox 100.

[0031] Multiple slats 10 and a bottom rail 13 located below the lowest slat 10 constitute a shielding material. The slats 10 and bottom rail 13 are supported by a lifting cord 11 and a ladder cord 12. The slats 10 and bottom rail 13 move up and down in a UD direction by winding up or unwinding the lifting cord 11. The slats 10 also rotate as the ladder cord 12 tilts.

[0032] The winding drum unit 40 includes a winding drum 410 that winds and unwinds the lifting cord 11 to raise and lower the multiple slats 10 and the bottom rail 13, and a tilt drum 420 that winds and unwinds the ladder cord 12 to tilt the multiple slats 10. The winding drum 410 is rotated by the lifting shaft 50. The tilt drum 420 is rotated by the tilt shaft 60.

[0033] The operating unit 20 operates the lifting operation cord 70 to rotate the winding drum 410 via the lifting shaft 50, thereby winding or unwinding the lifting operation cord 11 and performing vertical lifting and lowering movements between the slats 10 and the bottom rail 13. In the operating unit 20, the rotation of the lifting pulley 207 that winds or unwinds the lifting operation cord 70 allows the lifting shaft 50 to rotate via the one-way clutch housing 208 and the clutch unit 21. Details of the operating unit 20 will be described later.

[0034] The lifting shaft 50 is connected to the clutch unit 21 of the operating unit 20. The lifting shaft 50 transmits the rotational force from the rotating shaft 22 of the clutch unit 21 to the winding drum 410, causing the winding drum 410 to rotate.

[0035] The tilt unit 30 has a tilt operation cord 80 hanging down from the tilt pulley 302. The tilt operation cord 80 is an example of an operation cord. The tilt operation cord 80 permanently forms a loop by forming a single continuous cord body with a front cord 81 and a rear cord 82.

[0036] As shown in Figure 1, the lower end D of the tilt control cord 80 is positioned above U of the lower end D of the lift control cord 70. Preferably, the lower end D of the tilt control cord 80 is positioned above (arrow U) the end of the lift control cord 70.

[0037] This is to prevent the lifting operation cord 70 from getting tangled in the loop of the tilt operation cord 80. Therefore, if the lower end D of the tilt operation cord 80 is positioned above (arrow U) the lower end D of the lifting operation cord 70, it is possible to prevent the lifting operation cord 70 from getting tangled in the loop of the tilt operation cord 80.

[0038] In the tilt unit 30, the tilt pulley 302 rotates the tilt shaft 60, which in turn rotates the tilt drum 420 that winds or unwinds the ladder cord 12. The tilt shaft 60 allows the shielding material, specifically a plurality of slats 10, to be tilted via the ladder cord 12.

[0039] Here, the tilt pulley 302 has a shaft penetration portion 3021 through which the lifting shaft 50 passes. The tilt pulley 302 is also rotatable relative to the lifting shaft 50. The lifting shaft 50 passes through the tilt unit 30, including the shaft penetration portion 3021 of the tilt pulley 302, and is connected to the clutch unit 21 of the operating unit 20.

[0040] The lifting pulley 207 and the tilt pulley 302 are mounted coaxially, that is, on axis A50, in the left-right direction (LR), which is the longitudinal direction of the headbox 100. Details of the tilt unit 30 will be described later.

[0041] The tilt shaft 60 is connected to the gear train 306 of the tilt unit 30 and is configured to transmit the rotational force of the tilt pulley 302. In other words, the tilt shaft 60 drives the shielding material, which consists of slats 10 and bottom rails 13, via the tilt unit 30. The tilt shaft 60 is positioned parallel or approximately parallel to the lifting shaft 50 in the left-right direction (LR). In the longitudinal direction, i.e., in the left-right direction (LR), the right end side surface 601 of the tilt shaft 60 is positioned to face one side surface of the lifting pulley 207, specifically the left side surface 2073.

[0042] [Operation Unit] Figure 4 is an exploded perspective view showing the configuration of the operating unit 20 in the solar radiation shielding device 1.

[0043] As shown in Figure 4, the operating unit 20 includes a lifting pulley unit 200 and a clutch unit 21.

[0044] The lifting pulley unit 200 includes an auxiliary plate 202, a coil spring 203, a cord joint 204, a cord guide 205, a first support plate 206, a lifting pulley 207, a one-way clutch housing 208, a one-way clutch 209, a second support plate 210, and a clutch plate 211.

[0045] The mainspring 203 is a biasing member positioned between the auxiliary plate 202 and the first support plate 206 in the left-right direction (LR). One end 2031 on the outer circumference of the mainspring 203 is locked to the first support plate 206, and the other end 2032 on the inner circumference is locked to the right R end of the rotation axis 2071 of the lifting pulley 207. The mainspring 203 contracts in diameter when the lifting pulley 207 rotates in one direction. When the mainspring 203 contracts in diameter, it exerts a biasing force on the lifting pulley 207.

[0046] The cord joint 204 is provided so that even when the lifting operation cord 70 and the winding cord are not being operated, biasing force remains on the mainspring 203.

[0047] The cord joint 204 is covered by a top cover and an under cover, both of which are made of a soft material, making it less likely to damage the slat 10 even if it comes into contact with it.

[0048] The cord guide 205 is provided on the lower D of the front F of the first support plate 206. The cord guide 205 pulls out the retractable cord that is fixed to the cord joint 204. The cord guide 205 has a shape such that the lifting operation cord 70 is separated from the slat 10 and hangs down, for example, from the headbox 100 to the front F.

[0049] The cord guide 205 has a guide portion that forms a space inside. The cord guide 205's guide portion communicates with the inside of the first support plate 206 and the outside of the first support plate 206 through a communication hole. The winding cord, which is locked to and pulled out by the lifting pulley 207, is inserted through the communication hole. The cord guide 205's guide portion has an inner circumferential surface that is funnel-shaped. The funnel-shaped guide portion allows the winding cord to be guided in accordance with the change in the diameter of the winding cord wound around the lifting pulley 207, even if the diameter of the winding cord changes due to winding or unwinding of the winding cord. The communication hole has a flat surface when viewed from the front side F so as to be in surface contact with the protrusion 2047. As the flat surface of the communication hole and the protrusion 2047 are in surface contact and held, the lifting operation cord 70 hangs away from the slat 10, for example, away from the headbox 100 to the front side F.

[0050] The lifting pulley 207 is an example of a pulley. The lifting pulley 207 is positioned between the first support plate 206 and the second support plate 210 in the left-right direction (LR). The lifting pulley 207 rotates around the rotation axis 2071, winding up the retractable cord. As described above, the other end 2032 of the mainspring 203 is locked to the right end R of the rotation axis 2071. The lifting pulley 207 is connected to the one-way clutch 209 via the one-way clutch housing 208 located on the left side L of the rotation axis 2071. Therefore, the rotational force of the lifting pulley 207 is input to the one-way clutch 209.

[0051] The one-way clutch 209 transmits the rotational force of the lifting pulley 207 on the right side R in only one direction to the rotating shaft 22 of the clutch unit on the left side.

[0052] The second support plate 210, together with the first support plate 206, houses the lifting pulley 207, and the clutch plate 211 is attached to the left side L. The clutch plate 211 fixes the clutch unit 21 to the second support plate 210.

[0053] The clutch unit 21 consists of a rotating shaft 22 and a cylindrical cam (not shown) located inside the casing 23. The clutch unit 21 selects whether to transmit or not transmit force from the lifting pulley 207 to the lifting shaft 50, depending on the amount of the lifting operation cord 70 and the winding cord pulled out from the lifting pulley 207. The clutch unit 21 transmits the rotational force from the lifting pulley 207 to the lifting shaft 50. The clutch unit 21 is in a transmission state where the rotating shaft 22 slides axially (transmission direction), i.e., to the left L, by the cylindrical cam, and rotational force is transmitted from the rotating shaft 22 to the lifting shaft 50. On the other hand, when the operation of the lifting operation cord 70 and the winding cord is stopped, the cylindrical cam puts the unit into a holding state (a state in which the lifting pulley 207 cannot rotate in the reverse direction).

[0054] The operating unit 20 in the solar radiation shielding device 1, as described above, performs the raising and lowering operation of the shielding material as follows.

[0055] When the user pulls the lifting operation cord 70 downwards to D, the cord joint 204 is pulled out from the lifting pulley 207 downwards to D. Along with the cord joint 204, the retractable cord that is locked to the lifting pulley 207 is pulled out. The retractable cord rotates the lifting pulley 207 counterclockwise.

[0056] The mainspring 203 contracts in diameter due to the rotational force of the lifting pulley 207, thereby storing biasing force. The counterclockwise rotational force of the lifting pulley 207 is transmitted to the one-way clutch housing 208, and then to the rotating shaft 22 of the clutch unit 21 via the one-way clutch 209.

[0057] The clutch unit 21 enters a state of rotational force transmission, transmitting the counterclockwise rotation of the lifting pulley 207 to the lifting shaft 50, causing the bottom rail 13 to rise.

[0058] When the user stops pulling the lifting operation cord 70, the bottom rail 13 attempts to descend due to gravity, causing the lifting shaft 50 to attempt to rotate clockwise. At this time, the clutch unit 21 enters a holding state and stops the rotation of the lifting shaft 50.

[0059] When the user releases their hand from the lifting operation cord 70, the lifting pulley 207 rotates clockwise due to the biasing force stored in the mainspring 203. As the lifting pulley 207 rotates clockwise, the winding cord is wound onto the lifting pulley 207. At this time, the one-way clutch 209 does not transmit the clockwise rotation of the lifting pulley 207 to the rotating shaft 22.

[0060] When the cord joint 204 comes into contact with the cord guide 205, the rotation of the lifting pulley 207 stops.

[0061] When the user pulls the lifting / lowering operation cord 70 slightly, the clutch unit 21 becomes de-transmission. In this state, the bottom rail 13 descends by its own weight. If you want to stop the bottom rail 13 from descending by its own weight, pull the lifting / lowering operation cord 70.

[0062] [Tilt Unit] Figure 5 is an exploded perspective view showing the configuration of the tilt unit 30 in the solar shading device 1. Figure 6 is an AA cross-sectional view showing the internal structure of the tilt unit 30 of the solar shading device 1.

[0063] As shown in Figures 5 and 6, the tilt unit 30 includes a first tilt unit case 301, a tilt pulley 302, an output shaft 303, a clutch spring 304, a second tilt unit case 305, a gear train 306, a gear case 307, a collar 308, and a code guide 310.

[0064] The first tilt unit case 301 and the second tilt unit case 305 are examples of unit cases. The first tilt unit case 301, the second tilt unit case 305, and the gear case 307 function as housings for the components of the tilt unit 30. The first tilt unit case 301, the second tilt unit case 305, and the gear case 307 all have shaft penetration portions 3011, 3051, and 3071 through which the lifting shaft 50 can rotatably pass. A cord guide 310 is provided between the first tilt unit case 301 and the second tilt unit case 305 for passing the tilt operation cord 80 drawn from the tilt pulley 302. The second tilt unit case 305 also has a contact surface 3052 to which the clutch spring 304 is assembled.

[0065] The tilt pulley 302 is an example of a pulley. The tilt pulley 302 is housed in an internal space formed by the first tilt unit case 301 and the second tilt unit case 305. The tilt pulley 302 is positioned between the first tilt unit case 301 and the output shaft 303 in the left-right direction (LR).

[0066] The tilt pulley 302 has a shaft penetration portion 3021 and an output shaft coupling portion 3022. The shaft penetration portion 3021 is configured to allow the lifting shaft 50 to rotatably pass through it. The shaft penetration portion 3021 is located at the axis A50 of the lifting shaft 50 shown in Figure 5. The rotation center of the tilt pulley 302, that is, the rotation center of the second pulley, coincides with or approximately coincides with the axis A50 of the lifting shaft 50 shown in Figure 5. In other words, the tilt pulley 302 rotates around the shaft penetration portion 3021 by the tilt operation cord 80.

[0067] As shown in Figures 5 and 6, the output shaft 303 is attached to the tilt pulley 302 located on the right side R. The outer surface of the output shaft 303 faces the output shaft coupling portion 3022, which is provided on the left side (opposite side from the first tilt unit case 301) of the tilt pulley 302.

[0068] The output shaft 303 rotates around the shaft penetration portion 3034, similar to the tilt pulley 302.

[0069] The clutch spring 304 is a coil spring with ends 3041 and 3042 at one end and the other end. The clutch spring 304 is assembled to the contact surface 3052 of the second tilt unit case 305 and is located between the tilt pulley 302 and the output shaft 303. Specifically, the outer circumferential surface of the clutch spring 304 faces the inner circumferential surface of the output shaft coupling portion 3022 of the tilt pulley 302 and the inner circumferential surface of the outer circumferential sleeve 3030 of the output shaft 303.

[0070] When rotational force is input from the tilt pulley 302 to the output shaft 303, the clutch spring 304 is pushed by the output shaft coupling portion 3022 in a direction that separates the ends 3041 and 3042 in the circumferential direction. As a result, the clutch spring 304 expands in diameter.

[0071] Furthermore, when rotational force is input from the output shaft 303 to the tilt pulley 302, the clutch spring 304 is pushed toward the outer circumference by the outer sleeve of the output shaft 303. As a result, the clutch spring 304 is reduced in diameter.

[0072] The gear train 306 consists of a first gear 3061, a second gear 3062, and a third gear 3063. The gear train 306 is housed inside the space formed by the second tilt unit case 305 and the gear case 307.

[0073] In the first gear 3061, the shaft penetration portion 3064 is configured to allow the lifting shaft 50 to rotatably pass through, similar to the shaft penetration portion 3021 of the tilt pulley 302 and the shaft penetration portion 3034 of the output shaft 303. The shaft penetration portion 3064 is located at the position of axis A50 of the lifting shaft 50 shown in Figure 5. The rotation center of the first gear 3061 coincides with or approximately coincides with axis A50 of the lifting shaft 50 shown in Figure 5. In other words, the first gear 3061 rotates together with the output shaft 303 around the shaft penetration portion 3064. The second gear 3062 meshes with the first gear 3061 and the third gear 3063. The third gear 3063 is configured to rotatably pass through with the tilt shaft 60. Therefore, the gear train 306 can transmit its rotational force to the tilt shaft 60 via the second gear 3062 and the third gear 3063 as the first gear 3061 rotates together with the tilt pulley 302 and the output shaft 303. The gear train 306 is not particularly limited in its gear configuration, such as the number of gear stages or the number of teeth on each gear.

[0074] As shown in Figures 1, 3, and 6, in the solar radiation shielding device 1, the winding drum unit 40, the tilt unit 30, and the operating unit 20 are arranged at different positions in the left and right directions (LR) of the headbox 100.

[0075] As described above, the lifting shaft 50 passes through the tilt unit 30. Also, as shown in Figure 3, the lifting pulley 207 is located at or near the center of the cross-section of the headbox 100. By arranging it in this way inside the headbox 100, the diameter of the lifting pulley 207 can be set to the maximum dimension allowed by the vertical UD and front-rear FB of the headbox 100. In the solar shading device 1, maximizing the diameter of the lifting pulley 207 of the operating unit 20 reduces the downward pulling force D when operating the lifting operation cord 70.

[0076] The tilt pulley 302, like the lifting pulley 207, can have its diameter set to the maximum value of the dimensions allowed by the vertical UD and front-to-back FB of the headbox 100. Therefore, with the solar shading device 1, the force required to pull the tilt operation cord 80 downwards D can be reduced. In the solar shading device 1, in particular, when the slats 10 are made of wood, the weight of each slat 10 is heavier compared to those made of aluminum, so a reduction in operating force is even more desirable.

[0077] Figure 7 is a cross-sectional view showing the internal structure of the tilt unit 30 of the solar radiation shielding device 1.

[0078] As shown in Figure 7, in the tilt unit 30 of the solar shading device 1, the tilt operation cord 80 is fixed so as not to come loose from the locking parts 3028 and 3029 provided inside (radially inward) of the tilt pulley 302 by providing, for example, a knot at the ends of the front cord 81 hanging down from the front side F of the tilt operation cord 80 and the rear cord 82 hanging down from the rear side B of the tilt operation cord 80. Locking part 3028 is used to lock the tilt operation cord 80 when the tilt unit 30 is mounted on the right side R in the left-right direction LR when viewed from the front. Locking part 3029 is used to lock the tilt operation cord 80 when the tilt unit 30 is mounted on the left side L in the left-right direction LR when viewed from the front. As described above, the tilt unit 30 can be positioned on either the right side R or the left side L in the left-right direction LR when viewed from the front.

[0079] The front cord 81 and rear cord 82 of the tilt operation cord 80 are fixed to the locking parts 3028 and 3029, then pass through the inside of the tilt pulley 302, and are discharged from the discharge part on the opposite side of the locking parts 3028 and 3029, centered around the shaft penetration part 3021 corresponding to the first drive shaft. They are then wound around the tilt pulley 302 once before being discharged to the circumferential surface of the tilt pulley 302. The front cord 81 and rear cord 82 discharged onto the tilt pulley 302 are then discharged to the outside of the tilt unit 30 through the cord guide 310. Since the front cord 81 and rear cord 82 can be discharged with the same amount of winding onto the tilt pulley 302, the user can have the same feel when operating the front cord 81 and rear cord 82. Details of the cord guide 310 will be described later.

[0080] Furthermore, a stepped portion 3027 is provided inside the tilt pulley 302 in the area through which the rear cord 82 passes. The stepped portion 3027 is, for reference, taller in the left-right direction (LR - the depth direction of the paper) than other parts inside the tilt pulley 302. The presence of the stepped portion 3027 prevents the rear cord 82 from overlapping the front cord 81 when it is wrapped around the tilt pulley 302.

[0081] In the solar radiation shielding device 1, the tilt unit 30 described above performs the tilting operation of the shielding material as follows.

[0082] When the user pulls the front cord 81 (see Figure 7), which hangs down from the front F of the tilt operation cord 80, downward D, the tilt pulley 302 rotates counterclockwise. When it rotates counterclockwise, the tilt pulley 302's output shaft coupling portion 3022 contacts the end 3042 of the clutch spring 304, causing the clutch spring 304 to expand in diameter. As the clutch spring 304 expands in diameter, it moves away from the contact surface 3052 of the second tilt unit case 305, causing the tilt pulley 302 and the clutch spring 304 to rotate together, and the rotation of the tilt pulley 302 is transmitted to the output shaft 303 via the end 3042 of the clutch spring 304. The rotation of the output shaft 303 is transmitted to the tilt shaft 60 via the gear train 306.

[0083] Figure 8 is a schematic side view showing the tilt state of the slat 10 in the solar shading device 1. As the tilt axis 60 rotates, the tilt drum 420 (see Figure 1) rotates, causing the ladder cord 12 on the front side F to move downwards to D, and the slat 10 tilts (inclined) forward to F as shown in Figure 8.

[0084] When the user stops pulling the front cord 81 of the tilt operation cord 80 downward D, the clutch spring 304 contracts and tightens the contact surface 3052 of the second tilt unit case 305, maintaining the specified tilt angle of the slat 10.

[0085] When the user pulls the rear cord 82, which hangs down from the rear B of the tilt operation cord 80, downward D, the tilt pulley 302 rotates clockwise. As it rotates clockwise, the tilt pulley 302's output shaft coupling portion 3022 contacts the end 3041 of the clutch spring 304, causing the clutch spring 304 to expand in diameter. As the clutch spring 304 expands, it moves away from the contact surface 3052 of the second tilt unit case 305, causing the tilt pulley 302 and the clutch spring 304 to rotate together, and the rotation of the tilt pulley 302 is transmitted to the output shaft 303 via the end 3041 of the clutch spring 304. The rotation of the output shaft 303 is transmitted to the tilt shaft 60 via the gear train 306.

[0086] Figure 9 is a schematic side view showing the tilt state of the slat 10 in the solar shading device 1. As the tilt axis 60 rotates, the tilt drum 420 (see Figure 1) rotates, causing the ladder cord 12 at the rear B to move downward D, and the slat 10 tilts (inclined) to the rear B as shown in Figure 8.

[0087] When the user stops pulling the rear cord 82 of the tilt operation cord 80 downward D, the clutch spring 304 contracts and tightens the contact surface 3052 of the second tilt unit case 305, maintaining the specified tilt angle of the slat 10.

[0088] Furthermore, the input from the tilt shaft 60 to the gear train 306 attempts to rotate the output shaft 303, but the outer sleeve 3030 presses the ends 3041 and 3042 of the clutch spring 304 from the circumferential direction, causing the clutch spring 304 to contract in diameter. When the clutch spring 304 contracts, it tightens the contact surface 3052 of the second tilt unit case 305, and the rotation of the output shaft 303 is not transmitted to the tilt pulley 302. Therefore, in the solar shading device 1, even if the slat 10 comes into contact with the window due to an external force such as wind and force is transmitted to the tilt shaft 60, the clutch spring 304 contracts in diameter and force is not transmitted to the tilt pulley 302, thus maintaining the position of the slat 10 and preventing the slat 10 from tilting.

[0089] Details of the code guide 310 in the solar radiation shielding device 1 will be explained below.

[0090] Figure 10 is a cross-sectional view showing the tilt unit 30 and the cord guide 310 in the solar shading device 1. Figure 11 is a perspective view showing the fitting portion of the tilt unit 30 with the cord guide 310.

[0091] As shown in Figure 10, the cord guide 310 is attached to a notch 101 located near the lower end D of the front F of the headbox 100. The notch 101 is located in the headbox 100 below the tilt pulley 302, specifically below the rotation center A of the tilt pulley 302. The cord guide 310 is attached to the notch 101 to discharge the tilt operation cord 80, which is locked to the tilt pulley 302, to the outside of the tilt unit 30. The cord guide 310 has first fixing parts 311, 312, a second fixing part 313, and a communication hole 314.

[0092] The first fixing part 311 is provided so as to be able to lock onto the upper part 101U of the notch 101. The first fixing part 312 is provided so as to be able to lock onto the lower part 101D of the notch 101. The first fixing parts 311 and 312 enable the cord guide 310 to be fixed to the notch 101.

[0093] The first fixing portion 311 is provided with a recess 3111 that accommodates the front portion 103 of the headbox 100 near the upper portion 101U of the notch 101, and a contact portion 3112 that abuts against the front wall portions 322 of the first tilt unit case 301 and the second tilt unit case 305. The recess 3111 may also accommodate the headbox 100 and the decorative panel 102 that is attached to the headbox 100.

[0094] The first fixing portion 312 is provided with a recess 3121 that accommodates the lower surface portion 104 of the headbox 100 near the lower side portion 101D of the notch 101, an upper surface portion 3122 that forms the upper wall U of the recess 3121, and a lower surface portion 3123 that forms the lower wall D of the recess 3121. The length of the front-rear direction FB of the upper surface portion 3122 and the lower surface portion 3123 is such that the length of the upper surface portion 3122 is shorter than the length of the lower surface portion 3123.

[0095] The second fixing portion 313 is provided on the cord guide 310 above the first fixing portion 312 U, near the inner end of the communication hole 314. The second fixing portion 313 is formed in a concave shape with an opening on the upper U so that it can be fitted with the lower end portion 323 of the lower D of the first tilt unit case 301 and the second tilt unit case 305. With this configuration, the second fixing portion 313 makes it possible to fix the cord guide 310 to the first tilt unit case 301 and the second tilt unit case 305. With this configuration, the second fixing portion 313 suppresses rotation towards the front F in the front-rear direction FB and movement in the up-down direction UD around the upper part 101U of the notch portion 101 of the cord guide 310.

[0096] The communication hole 314 is a hole through which the front cord 81 and rear cord 82 of the tilt operation cord 80 can be inserted. When the headbox 100 is attached to the notch 101, the communication hole 314 connects the inside and outside of the headbox 100.

[0097] The first tilt unit case 301 and the second tilt unit case 305 have locking portions 321 that engage with the inner surface of the front portion 103 of the headbox 100. The locking portions 321 are provided above the notch portion 101 U. The locking portions 321 are formed in a convex shape with a flat portion on the upper U so that they can engage with a recess on the inner surface of the front wall portion 322. The locking portions 321 prevent the first tilt unit case 301 and the second tilt unit case 305 from moving in the vertical direction UD.

[0098] [Assembly procedure for solar shading measures] Next, we will explain an example of the assembly procedure (manufacturing method) for the solar radiation shielding device 1 described above.

[0099] Figure 12 is a first front view illustrating the assembly procedure of the solar radiation shielding device 1 according to this embodiment.

[0100] In the procedure for assembling the solar radiation shielding device 1, as shown in Figure 12, a winding drum unit 40 having a winding drum 410 and a tilt drum 420 is installed in the headbox 100. The lifting cord 11 is pre-attached to the winding drum 410. The ladder cord 12 is pre-attached to the tilt drum 420.

[0101] Figure 13 is a second front view illustrating the assembly procedure of the solar shading device 1.

[0102] In the procedure for assembling the solar radiation shielding device 1, after installing the winding drum unit 40 in the headbox 100, the tilt shaft 60 is inserted into the tilt drum 420 as shown in Figure 13.

[0103] Figure 14 is a third front view illustrating the assembly procedure of the solar shading device 1. Figure 15 is a side view showing the cord guide 310 temporarily attached to the headbox 100 during the assembly procedure of the solar shading device 1. Figure 16 is a side view showing the cord guide 310 temporarily attached to the headbox 100 during the assembly procedure of the solar shading device 1.

[0104] In the procedure for assembling the solar radiation shielding device 1, as shown in Figures 15 and 16, a step is performed to temporarily fasten the cord guide 310 of the tilt unit 30 to the headbox 100. Specifically, the first fixing parts 311 and 312 of the cord guide 310 are temporarily fastened to the notches 101 of the headbox 100. Here, as shown in Figure 15, the first fixing part 311 of the cord guide 310 is first locked to the end of the notch 101 located on the upper side U of the headbox 100. Then, when the cord guide 310 is pushed in toward the upper side U relative to the headbox 100, the first fixing part 312 is locked to the end of the notch 101 located on the lower side D.

[0105] As described above, the length of the front-to-back FB of the upper portion 3122 of the first fixing portion 312 is shorter than the length of the front-to-back FB of the lower portion 3123. Therefore, when pushing the cord guide 310 into the headbox 100 by rotating it toward the upper U, the upper portion 3122 avoids the end of the notch 101 and fits into the recess 3121. In this way, the cord guide 310 can be easily attached to the notch 101 of the headbox 100.

[0106] Figure 17 is a fourth front view illustrating the assembly procedure of the solar radiation shielding device 1.

[0107] In the procedure for assembling the solar shading device 1, after temporarily fixing the cord guide 310 to the headbox 100, the tilt unit 30 is installed in the headbox 100 as shown in Figure 17. The tilt unit 30 is inserted into the headbox 100 from the upper side U and installed. At this time, the second fixing portion 313 of the cord guide 310 functions as a marker for engaging the lower ends 323 of the first tilt unit case 301 and the second tilt unit case 305. As shown in Figure 17, once installed in the headbox 100, the tilt unit 30 is fixed by the engagement of the lower ends 323 of the first tilt unit case 301 and the second tilt unit case 305 with the second fixing portion 313 of the cord guide 310.

[0108] Figure 18 is a fifth front view illustrating the assembly procedure of the solar shading device 1.

[0109] In the procedure for assembling the solar shading device 1, after the tilt unit 30 is installed in the headbox 100, the tilt shaft 60 and the tilt unit 30 are connected as shown in Figure 18. Specifically, the tilt shaft 60 is inserted through the collar 308 and connected to the third gear 3063 so as to be rotatable together (see Figures 3 and 9).

[0110] Figure 19 is a sixth front view illustrating the assembly procedure of the solar shading device 1.

[0111] In the procedure for assembling the solar shading device 1, after connecting the tilt shaft 60 and the tilt unit 30, the lifting shaft 50 is inserted into the winding drum 410, as shown in Figure 19. At this time, the lifting shaft 50 is installed by passing through the tilt unit 30.

[0112] Figure 20 is a seventh front view illustrating the assembly procedure of the solar shading device 1.

[0113] In the procedure for assembling the solar shading device 1, after the lifting shaft 50 is inserted into the winding drum 410, the operating unit 20 is installed on the headbox 100 from the side, for example, the right side, as shown in Figure 20. After the operating unit 20 is installed on the headbox 100, it is connected to the lifting shaft 50. Furthermore, by securing the slats 10 and bottom rail 13 to the lifting cord 11 and ladder cord 12, the solar shading device 1 shown in Figure 1 is completed.

[0114] [Effects of the Invention] The solar radiation shielding device 1 described above can achieve the following effects.

[0115] In the solar radiation shielding device 1, a cord guide 310 that guides the tilt operation cord 80 of the tilt unit 30 is attached to a notch 101 provided in the headbox 100 that houses the first tilt unit case 301 and the second tilt unit case 305. The cord guide 310 has first fixing parts 311 and 312 that can be fixed to the notch 101, and a second fixing part 313 that can be fixed to the first tilt unit case 301 and the second tilt unit case 305.

[0116] With the configuration described above, as shown in Figure 10, the second fixing portion 313 of the cord guide 310 engages with the first tilt unit case 301 and the second tilt unit case 305, thereby restricting the longitudinal movement (left and right direction LR) of the tilt unit 30 within the head box 100.

[0117] Furthermore, with the configuration described above, the solar shading device 1 prevents the cord guide 310 from falling off the headbox 100 by fitting the second fixing part 313 to the lower end part 323. In other words, since the cord guide 310 of the solar shading device 1 does not require a separate member for fixing to the headbox 100, it can contribute to reducing assembly man-hours and the number of parts.

[0118] Furthermore, with the configuration described above, the solar shading device 1 can be installed by temporarily fixing the cord guide 310 to the headbox 100, as shown in Figure 17, and then lowering the tilt unit 30 into the headbox 100 from the upper U. In addition, at this time, the second fixing part 313 also functions as a marker when engaging the first tilt unit case 301 and the second tilt unit case 305. For this reason, the solar shading device 1 can improve ease of assembly compared to the case in which the tilt unit 30 is installed by moving it from the side inside the headbox 100.

[0119] Therefore, the solar radiation shielding device 1 can improve production efficiency.

[0120] In the solar shading device 1, the second fixing portion 313 of the cord guide 310 specifically engages with the lower end portions 323 of the first tilt unit case 301 and the second tilt unit case 305. With this configuration, the solar shading device 1 can further improve the production efficiency described above.

[0121] In the solar radiation shielding device 1, the notch 101 is located in the headbox 100 below the tilt pulley 302, specifically below the rotation center of the tilt pulley 302. The first tilt unit case 301 and the second tilt unit case 305 have locking portions 321 that engage with the headbox 100 above the notch 101.

[0122] With the configuration described above, the locking portion 321 in the solar radiation shielding device 1 can suppress the movement of the first tilt unit case 301 and the second tilt unit case 305 in the vertical direction UD.

[0123] In the solar radiation shielding device 1, the second fixing part 313 can suppress the movement of the cord guide 310 in the vertical direction UD.

[0124] Furthermore, those skilled in the art may modify the present invention as appropriate in accordance with prior art knowledge. Such modifications, insofar as they still possess the configuration of the present invention, are of course included within the scope of the present invention.

[0125] For example, in this embodiment, the cord guide 310 is shown as passing through the tilt operation cord 80 of the tilt unit 30, but the present invention is not limited to this, and is also suitable as a cord guide 205 for an operation unit 20 in which a shielding material such as a slat 10 is raised and lowered by operating a lifting operation cord 70. In other words, the cord guide according to the present invention can be applied to various cords that are drawn out from a notch provided in the headbox. [Explanation of Symbols]

[0126] 1...Sun shading device, 10...Slat (shading material), 11...Lifting cord, 12...Ladder cord, 13...Bottom rail (shading material), 20...Operating unit, 21...Clutch unit, 22...Rotating shaft, 23...Casing, 30...Tilt unit, 40...Winding drum unit, 50...Lifting shaft, 60...Tilt shaft (drive shaft), 70...Lifting operation cord, 80...Tilt operation cord (operating cord), 81...Front cord, 82...Rear cord, 100...Headbox, 101...Notch, 101D...Lower part, 1 01U...Upper part, 102...Decorative panel, 103...Front part, 104...Bottom part, 200...Lifting pulley unit, 202...Auxiliary plate, 203...Spring, 204...Cord joint, 205...Cord guide, 206...First support plate, 207...Lifting pulley, 208...One-way clutch housing, 209...One-way clutch, 210...Second support plate, 211...Clutch plate, 301...First tilt unit case (unit case), 302...Tilt pulley (pulley), 303...Outlet Force shaft, 304...Clutch spring, 305...Second tilt unit case (unit case), 306...Gear train, 307...Gear case, 308...Collar, 310...Cord guide, 311...First fixing part, 312...First fixing part, 313...Second fixing part, 314...Communication hole, 321...Locking part, 322...Front wall part, 323...Lower end, 410...Winding drum, 420...Tilt drum, 601...Side, 2031...One end, 2032...Other end, 2071...Rotation shaft, 2073...Side, 3011,3021,3034,3051,3 064, 3071…Shaft penetration section, 3022…Output shaft coupling section, 3027…Step section, 3028, 3029…Locking section, 3030…Outer circumference sleeve, 3041, 3042…End section, 3052…Contact surface, 3061…First gear, 3062…Second gear, 3063…Third gear, 3111…Recess, 3112…Contact section, 3121…Recess, 3122…Upper surface, 3123…Lower surface, A…Center of rotation, A50…Axis, FB…Short direction (front-back direction), LR…Long direction (left-right direction), UD…Up-down direction (downward direction, up-down direction)

Claims

1. Shielding material and, A drive shaft for driving the shielding material, A headbox housing the aforementioned drive shaft, The aforementioned drive shaft is rotatable by a pulley, A unit case mounted inside the headbox and rotatably supporting the pulley, The notch provided in the headbox, An operating cord that is locked to the pulley and discharged from the notch, A code guide provided in the notch for guiding the operating code, Equipped with, The aforementioned code guide is, A first fixing part that can be fixed to the aforementioned notch, It has a second fixing part that can be fixed to the unit case, Solar radiation shielding device.

2. The second fixing part is fixed to the unit case to suppress the movement of the cord guide. The solar radiation shielding device according to claim 1.

3. The second fixing part, by being fixed to the unit case, suppresses the longitudinal movement of the unit case. The solar radiation shielding device according to claim 1 or 2.

4. The aforementioned unit case has a locking portion that engages with the headbox, The locking portion suppresses the movement of the unit case in the vertical direction. The solar radiation shielding device according to claim 3.

5. The second fixing part suppresses the movement of the cord guide in the vertical direction. The solar radiation shielding device according to claim 1.

6. This is a cord guide provided in a notch in the headbox that houses the unit case, which guides the operating cord. A first fixing part that can be fixed to the aforementioned notch, It has a second fixing part that can be fixed to the unit case, Code guide.

7. A headbox housing a drive shaft that drives the shielding material, A unit case mounted inside the headbox that rotatably supports a pulley capable of rotating the drive shaft, The notch provided in the headbox, A cord guide is provided in the notch portion and guides the operating cord discharged from the notch portion, A method for manufacturing a solar radiation shielding device, The steps include fixing the cord guide to the notched portion of the headbox, The steps include inserting the unit case from the upper side of the headbox, The steps include fixing the second fixing portion of the code guide to the unit case, A method for manufacturing a solar radiation shielding device.

Images