Solar radiation shading device

Abstract

This allows for improved lifting and lowering operations without increasing the size of the headbox. [Solution] The solar radiation shielding device 1 comprises a shielding material, a lifting cord for raising and lowering the shielding material, a winding drum 410 for winding and unwinding the lifting cord and raising and lowering the shielding material, a first drive shaft 50 for rotating the winding drum, a second drive shaft 60 provided parallel to the first drive shaft and capable of tilting the shielding material, a first pulley 207 capable of rotating the first drive shaft, and a second pulley 302 capable of rotating the second drive shaft, wherein the first drive shaft passes through the second pulley and it is provided so as to be rotatable relative to the first drive shaft.

Description

Technical Field

[0001] The present invention relates to a solar radiation shielding device.

Background Art

[0002] Conventionally, in a solar radiation shielding device, there is known one in which a lifting drum is rotatable by operating an operation cord, and a rotating drum that rotates a shielding material is operable by an operation unit (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 a solar radiation shielding device, in order to reduce the operating load of an operation cord, it is desired to increase the outer diameter of a pulley (lifting pulley) rotated by the operation cord.

[0005] However, in the conventional technology, the lifting pulley and the gear train that rotates the rotating drum are arranged vertically when viewed from the longitudinal direction of the head box (the side direction of the head box). That is, in the conventional technology, in order to increase the outer diameter of the lifting pulley, it is necessary to increase the size of the head box, and it has been difficult to increase the outer diameter of the lifting pulley without increasing the size of the head box.

[0006] Therefore, the present invention has been made in view of the above problems, and one of the objects is to provide a solar radiation shielding device capable of improving the lifting operation without increasing the size of the head box.

Means for Solving the Problems

[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 lifting cord for raising and lowering the shielding material, a winding drum for winding and unwinding the lifting cord and raising and lowering the shielding material, a first drive shaft for rotating the winding drum, a second drive shaft provided parallel to the first drive shaft and capable of tilting the shielding material, a first pulley capable of rotating the first drive shaft, and a second pulley capable of rotating the second drive shaft, wherein the first drive shaft passes through the second pulley and it is provided so as to be rotatable relative to the first drive shaft.

[0008] The present invention includes a headbox that supports the shielding material via the lifting cord, wherein the first pulley and the second pulley may be provided coaxially in the longitudinal direction of the headbox.

[0009] In the present invention, the system includes a first operating cord that is locked to the first pulley and applies rotational force to the first pulley, and a biasing member that is locked to the first pulley and biases the first pulley to rotate in a predetermined rotational direction, wherein the first operating cord may be wound onto and unwound from the first pulley by the biasing force of the biasing member.

[0010] In the present invention, a second operating cord is provided which is locked to the second pulley and applies rotational force to the second pulley, the second pulley having a locking portion for locking the second operating cord, and the second operating cord may pass from the locking portion through the inside of the second pulley and be discharged from the opposite side of the locking portion to the circumferential surface of the second pulley, centered on the first drive shaft.

[0011] In the present invention, the first operating cord has a cord joint that restricts winding onto the first pulley, and the cord joint may have a base, a top cover having a protruding contact surface, and an under cover through which the first operating cord can be inserted and which covers the lower part of the base.

[0012] In the present invention, a funnel-shaped cord guide may be provided to guide the first operating cord from the first pulley to the cord joint.

[0013] In the present invention, the solar radiation shielding device comprises a shielding material, a lifting cord for raising and lowering the shielding material, a winding drum for winding the lifting cord and raising and lowering the shielding material, a first drive shaft for rotating the winding drum, a second drive shaft provided parallel to the first drive shaft and capable of tilting the shielding material, a first pulley capable of rotating the first drive shaft, and a second pulley capable of rotating the second drive shaft, wherein the second drive shaft may be positioned such that the side surface of its end in the longitudinal direction faces the side surface of the first pulley. [Effects of the Invention]

[0014] According to the present invention, it is possible to realize a solar radiation shielding device that can improve lifting and lowering operations without increasing the size of the headbox. [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 a cross-sectional view of the BB, showing the internal structure of the headbox of the solar radiation shielding device according to this embodiment. [Figure 6] This is an exploded perspective view showing the configuration of the tilt unit in the solar radiation shielding device according to this embodiment. [Figure 7] This is a perspective view showing the output shaft, clutch spring, and tilt pulley of the tilt unit in the solar radiation shielding device according to this embodiment. [Figure 8] It is a side view schematically showing an output shaft, a clutch spring, and a tilt pulley in a tilt unit in a solar radiation shielding device according to this embodiment. [Figure 9] It is a sectional view taken along line A-A showing an internal structure of a tilt unit of a solar radiation shielding device according to this embodiment. [Figure 10] It is a sectional view taken along line C-C showing an internal structure of a tilt unit of a solar radiation shielding device according to this embodiment. [Figure 11] It is a side view schematically showing a tilt state of a slat in a solar radiation shielding device according to this embodiment. [Figure 12] It is a side view schematically showing a tilt state of a slat in a solar radiation shielding device according to this embodiment. [Figure 13] It is a view showing a configuration of an end portion in a tilt operation cord of a modification of a solar radiation shielding device according to this embodiment. [Figure 14] It is a view showing a configuration of an end portion at a first tilt angle of a tilt operation cord of a modification of a solar radiation shielding device according to this embodiment. [Figure 15] It is a view showing a configuration of an end portion at a second tilt angle of a tilt operation cord of a modification of a solar radiation shielding device according to this embodiment. [Figure 16] It is a state diagram in which a joint in a tilt operation cord of a modification of a solar radiation shielding device according to this embodiment is separated. [Figure 17] It is a cross-sectional perspective view showing a configuration of a joint in a tilt operation cord of a modification of a solar radiation shielding device according to this embodiment. [Figure 18] It is a view showing end portions in a tilt operation cord and a lifting operation cord of a modification of a 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 in the drawings corresponding to the components of the invention are indicated in parentheses as an example.

[0017] [1] A solar radiation shielding device comprising: a shielding material (10, 13); a lifting cord (11) for raising and lowering the shielding material; a winding drum (410) for winding and unwinding the lifting cord and raising and lowering the shielding material; a first drive shaft (50) for rotating the winding drum; a second drive shaft (60) provided parallel to the first drive shaft and capable of tilting the shielding material; a first pulley (207) capable of rotating the first drive shaft; and a second pulley (302) capable of rotating the second drive shaft, wherein the second pulley is provided so as to be rotatable relative to the first drive shaft and through which the first drive shaft passes.

[0018] [2] The solar radiation shielding device according to [1], comprising a headbox (100) that supports the shielding material via the lifting cord, wherein the first pulley and the second pulley are provided coaxially in the longitudinal direction of the headbox.

[0019] [3] The solar radiation shielding device according to [1] or [2], comprising: a first operating cord (70) that is locked to the first pulley and applies rotational force to the first pulley; and a biasing member (203) that is locked to the first pulley and biases the first pulley to rotate in a predetermined rotational direction, wherein the first operating cord is wound onto and unwound from the first pulley by the biasing force of the biasing member.

[0020] [4] A solar radiation shielding device according to any one of [1] to [3], comprising a second operating cord (80) that is locked to the second pulley and imparts rotational force to the second pulley, wherein the second pulley has locking portions (3028, 3029) for locking the second operating cord, and the second operating cord passes from the locking portions through the inside of the second pulley and is discharged from the opposite side of the locking portions to the circumferential surface of the second pulley around the first drive shaft.

[0021] [5] The solar radiation shielding device according to [3] or [4], wherein the first operating cord has a cord joint (204) that restricts winding onto the first pulley, and the cord joint has a base (2041), a top cover (2042) having a protruding contact surface, and an under cover (2043) through which the first operating cord can be inserted and which covers the lower part of the base.

[0022] [6] The solar radiation shielding device according to [5], further comprising a funnel-shaped cord guide for guiding the first operating cord from the first pulley to the cord joint.

[0023] [7] A solar radiation shielding device comprising: shielding material (10, 13); a lifting cord (11) for raising and lowering the shielding material; a winding drum (410) for winding and unwinding the lifting cord and raising and lowering the shielding material; a first drive shaft (50) for rotating the winding drum; a second drive shaft (60) provided parallel to the first drive shaft and capable of tilting the shielding material; a first pulley (207) capable of rotating the first drive shaft; and a second pulley (302) capable of rotating the second drive shaft, wherein the second drive shaft is positioned such that the side surface of its end in the longitudinal direction faces the side surface of the first pulley.

[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 (first drive shaft) 50, tilt shaft (second drive shaft) 60, lifting operation cord (first operation cord) 70, tilt operation cord (second operation 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 that hangs down from the tilt pulley 302. The tilt operation cord 80 permanently forms a loop by being formed by the front cord 81 and the rear cord 82 being a single continuous string.

[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 3034 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, which acts as a second pulley. The tilt shaft 60 is positioned parallel or substantially 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] Figure 5 is a cross-sectional view of the headbox 100 of the solar radiation shielding device 1, showing its internal structure.

[0047] As shown in Figures 4 and 5, the cord joint 204 has a base 2041, a top cover 2042, and an under cover 2043. The base 2041 is formed of a hard resin material as a substantially conical cylindrical member. The base 2041 has a cavity 2044 that forms a space inside. The base 2041 has a communication hole 2045 at the upper end U that communicates with the cavity 2044. The retractable cord 71, which is locked to the lifting pulley 207 and pulled out, is inserted through the communication hole 2045. The end of the retractable cord 71 inserted through the communication hole 2045 is fixed, for example, by a knot, to prevent it from coming out of the communication hole 2045. The base 2041 has a communication hole 2046 at the lower end D that communicates with the cavity 2044. A lifting operation cord 70 is inserted through the communication hole 2046. The end of the lifting operation cord 70 inserted through the communication hole 2046 is secured, for example, by a knot to prevent it from coming out of the communication hole 2046. The lifting operation cord 70 and the winding cord 71 constitute the first operation cord. In this embodiment, the lifting operation cord 70 and the winding cord 71, which are separate cords, are each held to the base 2041 by a knot. In addition, in the solar shading device 1, the winding cord 71 and the lifting operation cord 70 may be a single cord (first operation cord). If the first operation cord is a single cord, the first operation cord is inserted through the communication hole 2045, a knot is made inside the cavity 2044, and then it is inserted to the outside through the communication hole 2046.

[0048] The top cover 2042 is provided on the outside of the base 2041, covering the outer circumference of the base 2041. The top cover 2042 is made of a soft material, such as an elastic material like rubber. The top cover 2042 only needs to be made of a soft, elastically deformable material. The top cover 2042 is provided with a projection 2047 that protrudes toward the cord guide 205 at the tip end of the communication hole 2045, so as to make surface contact with the cord guide 205.

[0049] The under cover 2043 is attached to cover the lower end D of the base 2041, i.e., the bottom. The under cover 2043 is made of a soft material, such as an elastic material like rubber. The under cover 2043 only needs to be made of a soft, elastically deformable material.

[0050] The cord joint 204 is provided so that even when the lifting operation cord 70 and the winding cord 71 are not being operated, biasing force remains on the mainspring 203.

[0051] The cord joint 204 is covered by a top cover 2042 and an under cover 2043, 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.

[0052] The retractable cord 71 is inserted through the top cover 2042, then through the communication hole 2045 into the cavity 2044 and secured to the base 2041 with a knot or the like. After that, the top cover 2042 is fitted onto the base 2041. Therefore, even if the top cover 2042 comes off the base 2041, it remains inserted through the retractable cord 71 and can be easily returned to its original position.

[0053] 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 71 which 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.

[0054] The cord guide 205 has a guide portion 2051 that forms a space inside. The cord guide 205 has a guide portion 2051 that communicates with the inside of the first support plate 206 and the outside of the first support plate 206 through a communication hole 2052. The retractable cord 71, which is locked to and pulled out by the lifting pulley 207, is inserted through the communication hole 2052. The cord guide 205 has a guide portion 2051 whose inner circumferential surface is formed in the shape of a funnel. The funnel-shaped guide portion 2051 allows the retractable cord 71 to be guided in accordance with the change in diameter of the retractable cord 71, even if the diameter of the retractable cord 71 wound around the lifting pulley 207 changes due to winding or unwinding of the retractable cord 71. The communication hole 2052 has a flat portion 2053 that is provided when viewed from the front side F so as to be in surface contact with the protruding portion 2047. The flat portion 2053 and the protruding portion 2047 of the communication hole 2052 are in surface contact and held, so the lifting operation cord 70 hangs away from the slat 10, for example, away from the headbox 100 to the front side F.

[0055] The lifting pulley 207 corresponds to the first 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 shaft 2071, winding the winding cord 71. As described above, the other end 2032 of the mainspring 203 is locked to the right end R of the rotation shaft 2071 of the lifting pulley 207. 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 shaft 2071. Therefore, the rotational force of the lifting pulley 207 is input to the one-way clutch 209.

[0056] 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.

[0057] 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.

[0058] 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 71 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 configured such that the rotating shaft 22 slides axially (in the 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 71 is stopped, the cylindrical cam is configured to hold the unit (preventing reverse rotation of the lifting pulley 207).

[0059] 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.

[0060] When the user pulls the lifting operation cord 70 downward D, the cord joint 204 is pulled out downward D from the lifting pulley 207. Along with the cord joint 204, the retractable cord 71, which is locked to the lifting pulley 207, is pulled out. The retractable cord 71 rotates the lifting pulley 207 counterclockwise.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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 71 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.

[0065] When the cord joint 204 comes into contact with the cord guide 205, the rotation of the lifting pulley 207 stops.

[0066] 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.

[0067] [Tilt Unit] Figure 6 is an exploded perspective view showing the configuration of the tilt unit 30 in the solar radiation shielding device 1.

[0068] As shown in Figure 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.

[0069] 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.

[0070] The tilt pulley 302 corresponds to the second 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).

[0071] 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 6. 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 6. In other words, the tilt pulley 302 rotates around the shaft penetration portion 3021 by the tilt operation cord 80.

[0072] Figure 7 is a perspective view showing the output shaft 303, clutch spring 304, and tilt pulley 302 of the tilt unit 30 in the solar shading device 1. Figure 8 is a schematic side view showing the output shaft 303, clutch spring 304, and tilt pulley 302 of the tilt unit 30 in the solar shading device 1.

[0073] As shown in Figures 6 to 8, 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.

[0074] The output shaft 303 has an outer circumference sleeve 3030 and a shaft penetration portion 3034. The shaft penetration portion 3034 is configured to allow the lifting shaft 50 to rotatably pass through, similar to the shaft penetration portion 3021 of the tilt pulley 302. The shaft penetration portion 3034 is located at the axis A50 of the lifting shaft 50 shown in Figure 6. The rotation center of the output shaft 303 coincides with or approximately coincides with the axis A50 of the lifting shaft 50 shown in Figure 6. In other words, the output shaft 303 rotates around the shaft penetration portion 3034, similar to the tilt pulley 302. The outer circumference sleeve 3030 is formed on the outer circumference side of the shaft penetration portion 3034, and is cylindrical or approximately cylindrical in shape.

[0075] 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 3044 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.

[0076] As shown in Figure 8, when the tilt unit 30 is assembled with the tilt pulley 302, output shaft 303, and clutch spring 304, the outer peripheral sleeve 3030 and the output shaft coupling portion 3022 are located radially outward from the outer peripheral surface 3044 of the clutch spring 304. The end portion 3041 of the clutch spring 304 is positioned between the output shaft coupling portion 3022 and one end 3031 of the outer peripheral sleeve 3030 in the circumferential direction of the output shaft 303. The end portion 3042 of the clutch spring 304 is positioned between the output shaft coupling portion 3022 and the other end 3032 of the outer peripheral sleeve 3030 in the circumferential direction of the output shaft 303.

[0077] With the above configuration, when rotational force is input from the tilt pulley 302 to the output shaft 303, the ends 3041 and 3042 of the clutch spring 304 are pushed apart in the circumferential direction by the output shaft coupling portion 3022. As a result, the clutch spring 304 expands in diameter.

[0078] Furthermore, when rotational force is input from the output shaft 303 to the tilt pulley 302, the clutch spring 304 is pushed by one end 3031 and the other end 3032 of the outer circumference sleeve 3030, causing the ends 3041 and 3042 to move toward each other in the circumferential direction. As a result, the clutch spring 304 is reduced in diameter.

[0079] 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.

[0080] 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 axis A50 of the lifting shaft 50 shown in Figure 6. The rotation center of the first gear 3061 coincides with or approximately coincides with the axis A50 of the lifting shaft 50 shown in Figure 6. 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.

[0081] Figure 9 is a cross-sectional view (AA) showing the internal structure of the tilt unit 30 of the solar radiation shielding device 1.

[0082] As shown in Figures 1, 3, and 9, 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.

[0083] 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.

[0084] 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.

[0085] Figure 10 is a cross-sectional view showing the internal structure of the tilt unit 30 of the solar radiation shielding device 1.

[0086] As shown in Figure 10, 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. The 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. The 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.

[0087] 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, and are 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's operating sensation for the front cord 81 and rear cord 82 can be made equal.

[0088] 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.

[0089] In the solar radiation shielding device 1, the tilt unit 30 described above performs the tilting operation of the shielding material as follows.

[0090] When the user pulls the front cord 81 (see Figure 10), which hangs down from the front F of the tilt operation cord 80, downward D, the tilt pulley 302 rotates counterclockwise. As it rotates counterclockwise, the output shaft coupling portion 3022 of the tilt pulley 302 contacts the end portion 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 portion 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.

[0091] Figure 11 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 11.

[0092] 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.

[0093] 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.

[0094] Figure 12 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 11.

[0095] 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.

[0096] Furthermore, the input from the tilt shaft 60 to the gear train 306 attempts to rotate the output shaft 303, but one end 3031 and the other end 3032 push the ends 3041 and 3042 from the circumferential direction, causing the clutch spring 304 to contract in diameter. When the clutch spring 304 contracts, it tightens against 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. For this reason, 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, so the position of the slat 10 is maintained and the slat 10 does not tilt.

[0097] [Effects of the Invention] The solar radiation shielding device 1 described above can achieve the following effects.

[0098] In the solar radiation shielding device 1, 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, including the shaft penetration portion 3021 of the tilt pulley 302, passes through the tilt unit 30 and is connected to the clutch unit 21 of the operating unit 20.

[0099] With the configuration described above, the solar shading device 1 makes it possible to bring the positions of the lifting pulley 207 of the operating unit 20 and the tilt pulley 302 of the tilt unit 30 closer together in the vertical direction UD or the front-to-back direction FB of the headbox 100. For example, in the solar shading device 1, the axes of the lifting pulley 207 and the tilt pulley 302 can be set coaxially, that is, on axis A50, in the longitudinal direction, which is the left-to-right direction LR.

[0100] Therefore, with the solar radiation shielding device 1, the outer diameter of the lifting pulley 207 can be increased compared to the case where the lifting pulley 207 and the tilt pulley 302 are arranged vertically when viewed from the longitudinal direction of the headbox 100. In other words, with the solar radiation shielding device 1, the outer diameter of the lifting pulley 207 can be increased without increasing the size of the headbox 100.

[0101] Therefore, the solar radiation shielding device 1 makes it possible to improve the lifting and lowering operation without increasing the size of the headbox 100.

[0102] In the solar shading device 1, the operating unit 20 is equipped with a spring 203 that biases the lifting pulley 207 to rotate in a predetermined direction, and the winding cord 71 is wound onto and unwound from the lifting pulley 207 by the biasing force of the spring 203, so that the lifting and lowering operations of the slat 10 and the bottom rail 13 can be easily performed. In other words, the solar shading device 1 can improve the lifting and lowering operation.

[0103] In the solar shading device 1, the tilt unit 30 has locking parts 3028 and 3029 for locking the tilt operation cord 80 to the tilt pulley 302. The tilt operation cord 80 passes through the inside of the tilt pulley 302 from the locking parts 3028 and 3029, is discharged from the discharge part on the opposite side of the locking parts 3028 and 3029, centered around the shaft penetration part 3021, is wound around the tilt pulley 302 once, and is then discharged to the circumferential surface of the tilt pulley 302. Therefore, the solar shading device 1 can improve the operability of the tilt operation.

[0104] In the solar shading device 1, the lifting operation cord 70 of the operating unit 20 has a cord joint 204 that restricts winding onto the lifting pulley 207. The cord joint 204 has a base 2041, a top cover 2042 having a protruding contact surface, and an under cover 2043 through which the lifting operation cord 70 can be inserted and which covers the lower part of the base 2041. With such a solar shading device 1, since the entire outer surface is covered by the top cover 2042 and the under cover 2043 which are made of a soft material, it is possible to make it less likely for the slats 10 to be damaged even if they come into contact with the top cover 2042 and the under cover 2043.

[0105] In the solar radiation shielding device 1, the cord guide 205 of the operating unit 20 has a funnel-shaped guide section 2051 on its inner circumference that guides the lifting operation cord 70. Therefore, even if the diameter of the winding cord 71 wound around the lifting pulley 207 changes due to winding or unwinding of the winding cord 71, the device can accommodate the change in the diameter of the winding cord 71.

[0106] In the solar shading device 1, the tilt axis 60 is positioned such that one side surface 601, specifically the right end, faces one side surface 2073, specifically the left side surface 2073, of the lifting pulley 207 in the left-right direction (LR). This configuration allows the outer diameter of the lifting pulley 207 to be increased. In other words, the solar shading device 1 allows the outer diameter of the lifting pulley 207 to be increased without increasing the size of the headbox 100.

[0107] Therefore, the solar radiation shielding device 1 makes it possible to improve the lifting and lowering operation without increasing the size of the headbox 100.

[0108] [Variations of the tilt control cord] This section describes a variation of the tilt control code 80.

[0109] Figure 13 shows the configuration of the end portion of the tilt operation cord 80B in a modified example of the solar radiation shielding device 1 according to this embodiment.

[0110] In the embodiments described above, the tilt operation cord 80 of the solar shading device 1 permanently forms a loop by forming the front cord 81 and the rear cord 82 into a single continuous string; however, the configuration of the tilt operation cord 80 is not limited to this.

[0111] As shown in Figure 13, in the solar shading device 1, the tilt operation cord 80B may be, for example, two cords, a front cord 81B and a rear cord 82B, each drawn out from the tilt pulley 302. The tilt operation cord 80B may have a joint 83 as a connecting member that detachably connects the front cord 81B and the rear cord 82B. The front cord 81B is provided with a cord operation part 84 at its end. The rear cord 82B is also provided with a cord operation part 85 at its end. The tilt operation cord 80B forms a loop by being detachably connected by the joint 83.

[0112] Figure 14 shows the configuration of the end of the tilt operation cord 80B of the solar shading device 1 at the first tilt angle. Figure 15 shows the configuration of the end of the tilt operation cord of a modified example of the solar shading device at the second tilt angle.

[0113] As shown in Figure 14, when the front cord 81B of the tilt operation cord 80 is pulled downward (arrow D) by the user, the cord operation part 84 at the end is positioned lower D than the cord operation part 85 of the rear cord 82B.

[0114] As shown in Figure 15, when the rear cord 82B of the tilt operation cord 80 is pulled downward (arrow D) by the user, the cord operation part 85 at the end is positioned lower D than the cord operation part 84 of the front cord 81B.

[0115] Figure 16 shows the joint 83 in the tilt operation cord 80B in a separated state. Figure 17 is a cross-sectional perspective view showing the configuration of the joint 83 in the tilt operation cord 80B.

[0116] As shown in Figures 16 and 17, the joint 83 is composed of a first joint portion 831 and a second joint portion 832. The first joint portion 831 has cord insertion holes 833 and 834 and a fitting recess 835. The second joint portion 832 has cord insertion holes 836 and 837 and a fitting projection 838. The front cord 81B is inserted through the cord insertion holes 833 and 834 of the first joint portion 831 and attached to the front cord 81B. The rear cord 82B is inserted through the cord insertion holes 836 and 837 of the second joint portion 832 and attached to the rear cord 82B. The first joint portion 831 is connected to the second joint portion 832 by fitting the fitting recess 835 with the fitting projection 838 of the second joint portion 832.

[0117] In the tilt operation cord 80B, when a force of a predetermined strength is applied to the joint 83, the first joint portion 831 and the second joint portion 832 are separated. In other words, the joint 83 also serves as a safety joint.

[0118] Figure 18 shows the ends of the tilt operation cord 80B and the lifting operation cord 70 of the solar shading device 1.

[0119] As shown in Figure 18, the cord operating sections 84 and 85, which are the ends of the tilt operation cord 80B, are set to be positioned above U the lower end D of the lifting operation cord 70. Preferably, the joint 83 of the tilt operation cord 80B is positioned above (arrow U) the end of the lifting operation cord 70.

[0120] This is to prevent the lifting operation cord 70 from getting tangled in the loop of the tilt operation cord 80B. Therefore, if the joint 83 of the tilt operation cord 80B 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 80B.

[0121] 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. [Explanation of Symbols]

[0122] 1...Solar shading device, 10...Slats (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 (first drive shaft), 60...Tilt shaft (second drive shaft), 70...Lifting operation cord (first operation cord), 71...Winding cord, 80,80B...Tilt operation cord (second operation cord), 81,81B...Front cord, 82,82B...Rear cord, 83...Joint, 84,85... 100... Headbox, 200... Lifting pulley unit, 202... Auxiliary plate, 203... Mainspring (biasing member), 204... Cord joint, 205... Cord guide, 206... First support plate, 207... Lifting pulley (first pulley), 208... One-way clutch housing, 209... One-way clutch, 210... Second support plate, 211... Clutch plate, 301... First tilt unit case, 302... Tilt pulley (second pulley), 303... Output shaft, 304... Clutch spring, 305... Second tilt unit case S, 306...Gear train, 307...Gear case, 308...Collar, 310...Cord guide, 410...Winding drum, 420...Tilt drum, 601...Side, 831...First joint, 832...Second joint, 833,834...Cord insertion hole, 835...Matching recess, 836,837...Cord insertion hole, 838...Matching projection, 2031...One end, 2032...Other end, 2041...Base, 2042...Top cover, 2043...Under cover, 2044...Cavity, 2045...Communication hole, 2046...Communication hole, 2047...Protrusion, 2051...Guide part, 2052...Communication Hole, 2053...flat section, 2071...rotating shaft, 2073...side section, 3011, 3021, 3034, 3051, 3064, 3071...shaft penetration section, 3022...output shaft coupling section, 3027...stepped section, 3028, 3029...locking section, 3030...outer circumference sleeve, 3031...one end, 3032...other end, 3033...outer circumference surface, 3041, 3042...end section, 3052...contact surface, 3061...first gear, 3062...second gear, 3063...third gear, 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 lifting cord for raising and lowering the aforementioned shielding material, A winding drum that winds and unwinds the aforementioned lifting cord and raises and lowers the shielding material, A first drive shaft that rotates the winding drum, A second drive shaft is provided parallel to the first drive shaft and capable of tilting the shielding material, The first drive shaft is rotatable by a first pulley, The second drive shaft is rotatable by a second pulley, Equipped with, The second pulley is provided through which the first drive shaft passes and is rotatable relative to the first drive shaft. Solar radiation shielding device.

2. A headbox that supports the shielding material via the aforementioned lifting cord, Equipped with, The first pulley and the second pulley are provided coaxially in the longitudinal direction of the headbox. The solar radiation shielding device according to claim 1.

3. A first operating cord that is engaged with the first pulley and applies rotational force to the first pulley, A biasing member that is engaged with the first pulley and biases the first pulley to rotate in a predetermined rotational direction, Equipped with, The first operating cord is wound onto and unwound from the first pulley by the biasing force of the biasing member. The solar radiation shielding device according to claim 1 or 2.

4. A second operating cord that is engaged with the second pulley and applies rotational force to the second pulley, Equipped with, The second pulley has a locking portion inside for locking the second operating cord, The second operating cord passes from the locking portion through the inside of the second pulley and is discharged from the opposite side of the locking portion to the circumferential surface of the second pulley, centered on the first drive shaft. The solar radiation shielding device according to claim 1 or 2.

5. The first operating cord has a cord joint that restricts winding onto the first pulley, The cord joint comprises a base, a top cover having a protruding contact surface, and an under cover through which the first operating cord can be inserted and which covers the lower part of the base. The solar radiation shielding device according to claim 3.

6. The system includes a funnel-shaped cord guide that guides the first operating cord from the first pulley to the cord joint. The solar radiation shielding device according to claim 5.

7. Shielding material and, A lifting cord for raising and lowering the aforementioned shielding material, A winding drum that winds up the aforementioned lifting cord and raises and lowers the shielding material, A first drive shaft that rotates the winding drum, A second drive shaft is provided parallel to the first drive shaft and capable of tilting the shielding material, The first drive shaft is rotatable by a first pulley, The second drive shaft is rotatable by a second pulley, Equipped with, The second drive shaft is positioned such that the side surface of its end in the longitudinal direction faces the side surface of the first pulley. Solar radiation shielding device.

Images