JP2022009536A - Speed adjustment device and shielding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speed adjustment device which has a structure for preventing dust from entering therein and limits the moving speed, in one direction, of a prescribed cord used for opening/closing a shielding material in a shielding device to brake the moving speed of the shielding material at a fixed value or lower, and to provide the shielding device.

SOLUTION: A speed adjustment device 6 according to an aspect of the present invention comprises: a speed regulator 6S having a braking mechanism for limiting the moving speeds, in one direction, of lifting cords C1, C2, C3 used for opening/closing a shielding material and housings (69, 61) having cord insertion holes 614 through which the lifting cords are inserted and housing the braking mechanism; a cord guide 6M for guiding the movements of the lifting cords; and a cover 6T having a dust-proof function for the speed regulator 6S and positioned above the speed regulator 6S. A shielding device of the present invention comprises the speed regulator 6S of the present invention and a frame body (head box 1) which supports the shielding material and which is opened at at least an upper part in which the speed regulator 6S is disposed.

SELECTED DRAWING: Figure 9

COPYRIGHT: (C)2022,JPO&INPIT

Description

INDUSTRIAL APPLICABILITY The present invention limits the moving speed of a predetermined cord in one direction, which is applicable to a shielding device such as a horizontal blind, a pleated screen, a Roman shade, a vertical blind accordion curtain, or a roll screen, to limit the moving speed of the shielding material. The present invention relates to a speed adjusting device and a shielding device for braking below a certain value.

As a shielding device that enables a speed adjusting device that limits the moving speed of a predetermined cord in one direction and brakes the moving speed of the shielding material to a certain value or less, a horizontal blind that manually operates the elevating cord is typically used. There is.

In such a horizontal blind, a plurality of stages of slats are suspended and supported from the head box via a plurality of ladder cords, and a bottom rail is suspended and supported at the lower end of the ladder cords. Further, a plurality of elevating cords are inserted into each slats, one end of the elevating cord is connected to the bottom rail, and the other end of the elevating cord is guided into the head box and connected to the operating device.

A gear mechanism is arranged in the head box of the operating device, and the input shaft of the gear mechanism is projected out of the head box from an opening provided in the head box, and a tilt operation rod is provided at the tip of the input shaft. Are connected, and the angle of the slats can be adjusted by rotating the tilt operation rod.

On the other hand, the elevating cord is led out from inside the headbox via the cord outlet and connected to one end of the operation cord via the cord equalizer, and the other end of the operation cord is connected to the bottom rail. Alternatively, the elevating cord may be guided from inside the head box through the cord outlet into the tilt operation rod, and may be connected to the knob at the lower end thereof.

Then, by operating the operation cord and the knob to pull out the elevating cord from the head box, the bottom rail is pulled up and the slats are raised.

When the pull-out operation of the elevating cord is stopped, the stopper device is activated to prevent the weight of the slats and the bottom rail from dropping. Further, when the operation of the stopper device is released, the slats and the bottom rail descend based on their own weight.

A speed adjusting device that can be applied to such a horizontal blind and generates a braking force only by moving the cord to be speed-adjusted in one direction is known (see, for example, Patent Document 1).

In particular, in the speed adjusting device disclosed in Patent Document 1, when a cord (for example, an elevating cord) is sandwiched by a pair of rollers, the pair of rollers detects the moving direction of the cord, and the cord moves in one direction. When the cord moves in the other direction, the pressure is narrowed by a pair of rollers to make the cord non-narrow pressure (relaxing the narrow pressure state), and the cord moves in the other direction. It is designed to switch.

Japanese Unexamined Patent Publication No. 2019-27128

As described above, a speed adjusting device in which a pair of rollers (idle roller and drive roller) switch between a narrow pressure state and a non-narrow pressure state with respect to the cord according to the movement direction of the cord is disclosed. The structure basically encloses and accommodates each roller for pressing and braking the predetermined cord between the base member and the case member, and one shaft of each roller is the base member and the other shaft. Is pivotally supported by a case member. Therefore, the base member is provided with a groove hole penetrating to support the other shaft, and the case member is provided with a groove hole penetrating to support the other shaft. When fitted to each other with the case member, the case member is formed with a guide portion for guiding a slider, which is one of the centrifugal brake type structural parts, as a hole portion that directly passes from the outside to the inside. .. However, if such a speed adjusting device is installed in a head box having an open upper part, for example, dust enters the inside of the speed adjusting device from the shaft hole or the guide portion, and the movement of each roller becomes poor, causing performance deterioration. There is a risk.

An object of the present invention is to have a structure for preventing dust from entering inside in view of the above-mentioned problems, and to limit the moving speed of a predetermined cord used for opening and closing a shielding material in a shielding device in one direction for shielding. It is an object of the present invention to provide a speed adjusting device and a shielding device for braking the moving speed of a material to a certain value or less.

One aspect of the speed adjusting device according to the present invention is a speed adjusting device that limits the moving speed of a predetermined cord used for opening and closing the shielding material in the shielding device in one direction and brakes the moving speed of the shielding material to a certain value or less. A braking mechanism that limits the speed of movement of the predetermined cord in one direction, a speed regulator having a cord insertion hole through which the predetermined cord is inserted and a housing for accommodating the braking mechanism, and the predetermined cord. It is characterized by comprising a cord guide for guiding the movement of the cord and a cover having a dustproof function for the speed regulator by engaging the cord guide so as to be located above the speed regulator.

Further, in the speed adjusting device of one aspect according to the present invention, the cover is characterized by having a main body length of a length protruding from both ends of the speed adjusting device in the moving direction of the predetermined cord.

Further, in the speed adjusting device according to the present invention, the cord guide is detachably attached to the housing of the speed adjusting device, and the cover is detachably attached to the cord guide. It is characterized by being.

Further, in the speed adjusting device of one aspect according to the present invention, the cover has a first engaging means for engaging with the cord guide so as to cover the cord guide from above while suppressing lateral displacement in the front-rear and left-right directions. It is characterized by.

Further, in the speed adjusting device of one aspect according to the present invention, the cover is provided as a member integrated with the code guide for guiding the movement of the predetermined cord, and is detachably attached to the housing of the speed adjusting device. It is characterized by being done.

Further, in one aspect of the speed adjusting device according to the present invention, the cover suppresses vertical displacement in the upward direction and lateral displacement in the front-rear direction without protruding from above the head box in which the speed adjustment device is housed and installed. It is characterized by having a second engaging means for engaging in the headbox.

Further, the shielding device of the present invention is a shielding device that opens and closes the shielding material by moving a predetermined cord, and limits the moving speed of the predetermined cord in one direction to keep the moving speed of the shielding material below a certain value. It is characterized in that the speed adjusting device of the present invention for braking and the frame body for supporting the shielding material are provided, and the speed adjusting device is arranged in the frame body having at least an open upper portion. do.

According to the present invention, it is possible to configure a speed adjusting device having a structure that prevents dust from entering inside.

It is a front view which shows the schematic structure of the horizontal blind configured as the shielding device of one Embodiment by this invention. It is a side view which shows the schematic structure of the horizontal blind configured as the shielding device of one Embodiment by this invention. It is a perspective view which shows the schematic structure of the speed regulator in the speed regulator of Example 1 by this invention. It is an exploded perspective view which shows the schematic structure of the speed regulator in the speed regulator of Example 1 by this invention. (A) and (b) are perspective views showing the schematic configuration of the speed adjusting device of the first embodiment according to the present invention, respectively, and (c) and (d) are the speed adjusting devices of the second embodiment according to the present invention, respectively. It is a perspective view which shows the schematic structure of. (A) and (b) are perspective views showing schematic configurations of a case member and a base member constituting the speed adjusting device of the third embodiment according to the present invention, respectively. It is a perspective view which shows the schematic structure of the speed adjustment apparatus of Example 3 by this invention. (A) and (b) are perspective views showing each member for constituting the speed adjusting apparatus of Example 4 according to this invention, respectively, and (c) is an outline of the speed adjusting apparatus of Example 4 according to this invention. It is a perspective view which shows the structure. It is a perspective perspective view which shows the state which arranged the speed adjustment apparatus of Example 4 by this invention in a head box. (A) is a front view showing a schematic configuration of the speed adjusting device of Example 4 according to the present invention, and (b) and (c) are side views thereof. (A) to (d) are plan views for explaining the operation of the speed adjusting apparatus of Example 4 according to this invention, respectively. (A) and (b) are perspective views which show the schematic structure of the speed adjustment apparatus of Example 5 according to this invention, respectively. (A) and (b) are perspective views which show the schematic structure of the speed adjustment apparatus of Example 6 according to this invention, respectively.

Hereinafter, the speed adjusting device of each embodiment in the shielding device of one embodiment according to the present invention will be described with reference to the drawings. In the specification of the present application, the upper side and the lower side of the drawing are defined as the upward direction (or the upper side) and the lower direction (or the lower side), respectively, with respect to the front view of the horizontal blind configured as the shielding device shown in FIG. , The left direction in the figure is defined as the left side of the horizontal blind, and the right direction in the figure is defined as the right side of the horizontal blind. Further, in the example described below, with respect to the front view of the horizontal blind shown in FIG. 1, the side to be visually recognized is the front side (or the indoor side), and the opposite side is the rear side (or the outdoor side).

[Cloaking device]
FIG. 1 is a front view showing a schematic configuration of a horizontal blind configured as a shielding device according to an embodiment of the present invention. Further, FIG. 2 is a side view showing a schematic configuration of a horizontal blind configured as a shielding device according to an embodiment of the present invention. In the horizontal blind of the present embodiment, a multi-stage slats 3 are supported via a ladder cord 2 suspended from the vicinity of the left and right ends of the head box 1 and substantially the center portion, and a bottom rail 4 is provided at the lower end of the ladder cord 2. Is suspended and supported.

Further, the elevating cords C1 and C3 are hung from the vicinity of the left and right ends of the head box 1 alongside the warp threads on the outdoor side of the ladder code 2, respectively, and from the substantially central portion of the head box 1 to the indoor side of the ladder code 2. The elevating cord C2 is hung alongside the warp. A bottom rail 4 is attached to the lower ends of the elevating cords C1, C2, and C3.

A support member 5 for supporting the ladder cord 2 and the elevating cords C1, C2, and C3 is arranged in the head box 1, and a hexagonal rod-shaped drive shaft 13 is inserted through the support member 5.

A tilt drum 51 is rotatably supported by the support member 5, and a drive shaft 13 is inserted through the tilt drum 51 so as to be relatively non-rotatable. Therefore, when the drive shaft 13 is rotated, the tilt drum 51 is rotated, and the angles of the multi-stage slats 3 suspended and supported by the ladder cord 2 are adjusted in the same phase. The support member 5 is provided with a turning pulley 52 that is turned so as to guide the other ends of the elevating cords C1, C2, and C3 having one ends attached to the bottom rail 4 in the left-right direction in the head box 1. Suitable.

A tilt window portion 11 is formed on the right end side of the head box 1 to hang a tilt operation rod 9 having one end attached to the tilt operation grip 10. The other end of the tilt operation rod 9 is connected to the gear mechanism 12 in the head box 1 via the tilt window portion 11. Further, the gear mechanism 12 connects the drive shaft 13 and is configured to transmit the rotation of the tilt operation rod 9 to the rotation of the drive shaft 13. Therefore, by rotating the tilt operation grip 10, the rotation is transmitted to the drive shaft 13, and the angle of the multi-stage slats 3 suspended and supported by the ladder cord 2 via the support member 5 can be adjusted. can.

The other ends of the elevating cords C1, C2, and C3 that attach one end to the bottom rail 4 are guided to the right end side in the head box 1 via the support member 5, and are guided to the right end side in the head box 1 via the stopper device 15 in the head box 1. After that, when it is inserted into the speed adjusting device 6 according to the present invention installed in the head box 1, it hangs down from the cord outlet 14 and is connected to the cord equalizer 8.

In the example shown in FIGS. 1 and 2, one end of the operation code 7 is attached to the lower end of the code equalizer 8 connecting the ends of the plurality of elevating cords C1, C2, and C3 hanging from the cord outlet 14. .. The other end of the operation code 7 is attached to the bottom rail 4.

However, as a modification relating to the hanging of the plurality of lifting cords C1, C2, and C3, the ends of the plurality of lifting cords C1, C2, and C3 are guided into the tilt operation rod 9 without hanging from the cord outlet 14, respectively. At the lower end, it may be configured to be connected to a knob.

In the example shown in FIGS. 1 and 2, if the operation code 7, the code equalizer 8, or a plurality of elevating cords C1, C2, and C3 are operated to pull out the elevating cords C1, C2, and C3 from the cord outlet 14. , The bottom rail 4 is pulled up and the slats 3 are raised. Therefore, the elevating cords C1, C2, and C3 act as traction cords for pulling the slats 3 and the bottom rail 4 as they rise.

When the pull-out operation of the elevating cords C1, C2, and C3 is stopped, the stopper device 15 is activated to prevent the slat 3 and the bottom rail 4 from dropping their own weight. Further, if the operation of the stopper device 15 is released, the slats 3 and the bottom rail 4 descend based on their own weights.

In this way, the horizontal blind is configured to lower the slat 3 by its own weight by the weight of the bottom rail 4 and the slat 3 when the stopper device 15 is released, and raise the slat 3 by directly pulling the elevating cords C1, C2, and C3. Then, it is preferable to provide a speed adjusting device 6 so that the slats 3 can be lowered smoothly and at an appropriate speed.

The speed adjusting device 6 limits the moving speed in one direction of the code to be speed adjusted (elevating code C1, C2, C3 in the examples shown in FIGS. 1 and 2) and brakes the moving speed of the slats 3 to a certain value or less. It is a device to do.

If the speed adjusting device 6 is not installed, if the lifting cords C1, C2, C3 and the like hanging from the cord outlet 14 are released during the descending operation, the operation of the stopper device 15 is released and the weight of the bottom rail 4 and the slats 3 is reduced. As a result, the vehicle will fall freely, and the falling sound and the collision sound of the bottom rail 4 with the floor surface at that time will cause discomfort to the operator. Therefore, by providing the speed adjusting device 6 as in the present embodiment, it is possible to decelerate only when descending to exert a braking force to decelerate and descend.

If a certain braking force is applied even during the raising operation of the slat 3, the guide load at that time will increase, and the constant braking force will always be applied, which is a factor of cord deterioration. It is also not preferable in that it becomes.

Therefore, the speed adjusting device 6 generates a braking force only for movement in one direction of the code to be speed adjusted (elevating code C1, C2, C3 in the examples shown in FIGS. 1 and 2), and the other. It is possible to reduce the load of the cord when moving in a direction.

Further, although the speed adjusting device 6 will be described in detail later, a pair of rollers sandwiches the elevating cords C1, C2 and C3, and the elevating cords C1, C2 and C3 are attached to the elevating cords C1, C2 and C3 according to the moving direction of the elevating cords C1, C2 and C3. It is designed to switch between narrow pressure and non-narrow pressure states, and is provided with a brake unit that generates braking torque for the rotation shaft (roller shaft) of either or both rollers in the pair of rollers (the roller shaft). In the embodiment described later, the brake portion is provided only for one of the roller shafts).

Then, when the slat 3 descends, the speed adjusting device 6 generates a braking force that causes high friction against the movement of the elevating cord so that the braking portion provided in the speed adjusting device 6 can smoothly and at an appropriate speed. When the slats 3 are raised, the slats 3 are configured to be smoothly operated so that the generation of braking force, which is low friction with respect to the movement of the elevating cord, is almost zero.

Hereinafter, the speed adjusting device 6 of each embodiment according to the present invention will be described in detail.

[Speed Adjusting Device of Example 1]
FIG. 3 is a perspective view of the speed regulator 6S in the speed regulator 6 according to the first embodiment of the present invention. Further, FIG. 4 is an exploded perspective view of the speed regulator 6S in the speed regulator 6 according to the first embodiment of the present invention. 5 (a) and 5 (b) are perspective views showing a schematic configuration of the speed adjusting device 6 of the first embodiment according to the present invention, respectively, by covering the speed adjusting device 6S with the upper cover 71. It shows that the speed adjusting device 6 of 1 is configured. The basic structure of the speed regulator 6S can be the same as any of the embodiments disclosed in Patent Document 1, but here, an embodiment will be described again.

(Speed regulator 6S)
First, as shown in FIGS. 3 and 4, the speed regulator 6S in the speed regulator 6 according to the first embodiment of the present invention includes a case member 61, a slider 62, a coil spring SP, an idle roller 63, and a drive roller 64. It includes a carrier 65 with gears, an annular plate 66, a weight holder 67 with sun gears, a weight 68, and a base member 69. The carrier 65 with gears, the annular plate 66, the weight holder 67 with sun gears, and the weight 68 are configured as a brake portion 6a that generates braking torque with respect to the rotation of the drive roller 64.

The case member 61 has a box-like shape in which a slider accommodating portion 611 accommodating a slider 62 and a coil spring SP and a brake accommodating portion 612 accommodating a brake portion 6a are connected and opened downward. An inner peripheral gear 612a is formed on the inner peripheral wall of the brake accommodating portion 612 of the case member 61. Further, in the case member 61, fitting holes 615 are formed at the four corners in the plate-shaped portion at the lower end of the brake accommodating portion 612, and the base member 69 is also formed in a substantially disk shape having fitting protrusion pieces 693 at the four corners. The fitting projection pieces 693 of the base member 69 are inserted and fitted into the fitting holes 615 of the case member 61, and the base member 69 is covered with the case member 61. The case member 61 is provided with cord insertion holes 614 through which the elevating cords C1, C2, and C3 can be inserted, on each wall portion in the left-right direction of the slider accommodating portion 611.

By the way, on the upper surface of the slider accommodating portion 611 of the case member 61, a pair of shaft holes 613 curved in a V shape extending substantially in the left-right direction and slightly bending in the front-rear direction are formed, and the pair of shaft holes are formed. The 613 pivotally supports the idle roller 63 and the upper roller shafts 631, 641 of the drive roller 64 housed in the slider 62 so as to be movable along the hole shape. Further, a guide portion 616 for guiding the slider 62 is formed as a hole portion that directly passes from the outside to the inside at an appropriate position on the side surface or the corner portion of the slider accommodating portion 611 in the case member 61.

In this example, as shown in FIG. 4, a shaft support reinforcing portion 611a for reinforcing the upper shaft support of the roller shaft 641 is formed on the upper surface of the slider accommodating portion 611 in the case member 61.

The slider 62 is configured in a substantially square box shape having a hollow portion 620 that is surrounded by the left and right vertical walls, the top wall, and the bottom wall and penetrates in the front-rear direction, and is formed of a roller portion 632 of the idle roller 63 and a drive roller 64. The roller portion 642 is housed in the cavity portion 620, and the roller shafts 631, 641 on the upper side of the roller portions 632 and 642 are pivotally supported by a pair of top wall grooves 621 formed in the top wall so as to extend in the front-rear direction. The lower roller shafts 631, 641 of each roller portion 632, 642 are formed by a pair of lower wall grooves 622 formed in parallel with the pair of top wall grooves 621 so as to extend in the front-rear direction on the bottom wall. It supports the axis. As a result, the slider 62 movably supports the idle roller 63 and the drive roller 64 in the front-rear direction that intersects the pair of shaft holes 613 curved in a V shape. There is.

Further, when the slider 62 is housed in the slider accommodating portion 611 of the case member 61, the other end of the coil spring SP that engages one end with the inner wall of the slider accommodating portion 611 engages with the engaging recess 623 of the slider 62. The slider 62 is always urged in one direction (left direction in the figure) in the slider accommodating portion 611 of the case member 61 and relatively moves in the left-right direction by the coil spring SP by the compression spring. Relative slide movement) is possible.

A cord insertion hole 624 is formed on each of the left and right vertical walls of the slider 62. Therefore, in a state where the slider 62 is housed in the slider accommodating portion 611 of the case member 61, the elevating cords C1, C2, and C3 inserted through the cord insertion hole 614 of the case member 61 through the cord insertion hole 624 of the slider 62 In each case, the slider 62 is sandwiched between the roller portion 632 of the idle roller 63 and the roller portion 642 of the drive roller 64.

Therefore, the idle roller 63 and the drive roller 64 slidably supported by the slider 62 can move along the pair of shaft holes 613 of the case member 61, and move in the moving directions of the elevating cords C1, C2, and C3. The narrow pressure / non-narrow pressure state for the elevating cords C1, C2, and C3 can be switched accordingly.

The idle roller 63 has a roller portion 632 with the roller shaft 631 as the axis. The roller shaft 631 above the roller portion 632 is pivotally supported by one of the top wall grooves 621 of the slider 62 and one of the pair of shaft holes 613 curved in a V shape of the case member 61. The roller shaft 631 below the roller portion 632 is pivotally supported by one of the bottom wall grooves 622 of the slider 62, and then has a carrier 65 with gears configured as a brake portion 6a, an annular plate 66, a weight holder 67 with sun gears, and the like. One of a pair of shaft holes 692 curved in a V shape provided in a raised portion 691 that rises in a circular shape at substantially the center of the base member 69 through the hollow portion of each of these members without interfering with the weight 68. It is pivotally supported by the shaft hole. The pair of shaft holes 613 curved in a V shape of the case member 61 and the pair of shaft holes 692 curved in a C shape provided in the base member 69 have curved shapes corresponding to each other. There is.

The drive roller 64 includes a roller portion 642 having a roller shaft 641 as an axis, and a pinion gear 644 having the roller shaft 641 as an axis below the roller portion 642. The roller shaft 641 above the roller portion 642 of the drive roller 64 is pivotally supported by the other top wall groove 621 of the slider 62 and the other shaft hole of the pair of shaft holes 613 curved in a V shape of the case member 61. Ru. The roller shaft 641 between the roller portion 642 and the pinion gear 644 is pivotally supported by the other bottom wall groove 622 of the slider 62. Further, the roller shaft 641 below the pinion gear 644 is pivotally supported by the other bottom wall groove 622 of the slider 62, and then has a carrier 65 with a gear, an annular plate 66, and a weight holder with a sun gear, which are configured as a brake portion 6a. A pair of shaft holes 692 curved in a V shape provided in a raised portion 691 that rises in a circular shape at substantially the center of the base member 69 through the hollow portion of each of the members without interfering with the 67 and the weight 68. It is pivotally supported by the other shaft hole.

In this example, a knurl is engraved on the peripheral surface of the roller portion 642 of the drive roller 64, and the knurl is not engraved on the peripheral surface of the roller portion 632 of the idle roller 63, and the peripheral surface is a flat peripheral surface. A knurl may also be engraved on the peripheral surface of the 632. Further, a washer (not shown) can be appropriately interposed in each shaft portion of the drive roller 64 and the idle roller 63.

In this example, the brake portion 6a has a centrifugal brake structure in which the amount of brake can be adjusted in multiple stages, and is composed of a carrier 65 with gears, an annular plate 66, a weight holder 67 with sun gears, and a weight 68. In particular, the brake unit 6a is configured to have a braking torque amplification function based on the rotation of the pinion gear 644 and a braking torque adjusting function that enables the braking torque of the centrifugal brake to be adjusted in multiple stages.

The carrier 65 with gears has a cylindrical portion 654 having a hollow portion in the center of a substantially disk-shaped carrier main body 651 and projecting downward, and an internal gear 652 is provided on the inner peripheral surface of the cylindrical portion above the cylindrical portion 654. It is formed. The internal gear 652 is meshed with the pinion gear 644 of the drive roller 64. Then, the pinion gear 644 is accommodated in the brake accommodating portion 612 of the case member 61 in a state of being meshed with the internal gear 652. Further, on the lower surface of the substantially disk-shaped carrier main body 651 of the carrier 65 with gears, a plurality (4 in this example) are symmetrically arranged at predetermined intervals on the outer periphery of the cylindrical portion 654 of the portion protruding downward from the carrier main body 651. The planetary gear 653 is rotatably supported. In this example, the internal gear 652 is formed on the inner peripheral surface of the upper cylindrical portion of the cylindrical portion 654, but as disclosed in Patent Document 1, the outer periphery of the upper cylindrical portion of the cylindrical portion 654 is formed. It is also possible to form an external gear formed on the surface.

Each planetary gear 653 meshes with the sun gear 672 in the weight holder 67 with the sun gear and the inner peripheral gear 612a formed on the inner peripheral wall of the brake accommodating portion 612 of the case member 61.

Then, the inner peripheral surface of the cylindrical portion 654 projecting downward of the carrier 65 with gears engages with the outer peripheral wall of the raised portion 691 that rises in a circular shape at the substantially center of the base member 69 and is rotatably supported. It is possible to rotate (revolve) around the central portion of the gear 652 as a central axis. Therefore, the rotation of the pinion gear 644 of the drive roller 64 is transmitted to the internal gear 652, so that the carrier 65 with gears rotates, and along with this, each planet rotatably supported by the carrier main body 651 of the carrier 65 with gears. By rotating the gear 653, it becomes possible to transmit the rotation of the pinion gear 644 to the weight holder 67 with a sun gear.

In the weight holder 67 with a sun gear, eight projecting pieces 673 radially protruding from the lower outer circumference of the holder body 671 having a substantially cylindrical shape are formed in this example, and the upper substantially cylinder on which the projecting pieces 673 are formed. A sun gear 672 is formed on the outer peripheral surface of the holder body 671. The inner peripheral surface of the holder body 671 is rotatably supported by engaging with the outer peripheral surface of the cylindrical portion 654 protruding below the carrier 65 with gears, and rotates (revolves) around the central portion of the sun gear 672. It is possible.

The base member 69 has a pair of shaft holes 692 curved in a V shape as described above in a raised portion 691 that rises in a circular shape from a substantially disc-shaped bottom portion substantially in the center thereof. The raised portion 691 has a groove 691a formed in a circular shape when viewed from the bottom surface side, and the pair of shaft holes 692 has a pair of shaft holes 613 curved in a V shape of the case member 61. Similarly, it is configured as a through hole. The pair of shaft holes 613 are adapted to support the idle roller 63 and the lower roller shafts 631, 641 of the drive roller 64 so as to be movable along the hole shape, and each roller shaft 631. Although 641 is exposed from the groove 691a when viewed from the bottom surface side, it does not protrude downward from the substantially disk-shaped bottom portion of the base member 69.

The base member 69 is formed with fitting projection pieces 693 protruding upward from the four corners of the bottom formed in a substantially disk shape, and a braking mechanism (slider 62, coil spring SP, idle roller 63, drive roller 64) is formed. , The carrier 65 with gears, the annular plate 66, the weight holder 67 with sun gears, and the weight 68), and each fitting projection piece 693 of the base member 69 is placed in each fitting hole 615 of the case member 61. The base member 69 is covered with the case member 61 by inserting and fitting. Therefore, the base member 69 and the case member 61 engage with each other to form a housing that surrounds and accommodates the braking mechanism.

The centrifugal force increases as the radius of gyration increases, the rotation speed increases, and the mass (weight and number of weights 68 themselves) increases. However, in the speed adjuster 6S in the speed adjusting device 6 of the first embodiment, the pinion gear Since the rotation of the 644 is transmitted to the weight holder 67 with the sun gear by increasing the rotation speed via the carrier 65 with the gear, the action of amplifying the braking torque occurs, which is an efficient control. It can generate power.

In this example, the eight projecting pieces 673 formed so as to project radially from the lower outer circumference of the substantially cylindrical holder body 671 form eight recesses, and each of the eight recesses has a substantially trapezoidal plate shape. Weights 68 can be arranged so that the eight projecting pieces 673 can hold each weight 68 in cooperation with the inner wall of the brake accommodating portion 612 in the case member 61.

Further, the speed adjuster 6S in the speed adjusting device 6 of the first embodiment can adjust the braking torque by the centrifugal brake applied to the pinion gear 644 by making it possible to adjust the number of the weights 68 arranged, and the weights can be adjusted. In this example, a total of 9 steps can be adjusted, including the case where 68 is not arranged at all. By increasing the maximum number of weights 68 that can be arranged in the weight holder 67 with sun gears (increasing the number of protruding pieces 673), it is possible to adjust the braking torque by a finer multi-step centrifugal brake.

The annular plate 66 prevents the planetary gears 653 from tilting and prevents the planetary gears 653 from interfering with the weight 68 when the carrier 65 with gears and the weight holder 67 with sun gears are engaged with each other. Has a function.

Further, in the speed adjuster 6S in the speed adjusting device 6 of the first embodiment, the pair of roller portions 632 and 642 by the idle roller 63 and the drive roller 64 slidably supported by the slider 62 with respect to the case member 61 is a case. Since each roller shaft is guided by a pair of shaft holes 613 curved in a C shape of the member 61 and a pair of shaft holes 692 curved in a C shape of the base member 69, the elevating cord It is possible to detect the presence / absence of movement and the movement direction of C1, C2, and C3. Then, when the elevating cords C1, C2 and C3 move in one direction, the elevating cords C1, C2 and C3 are narrowed by the pair of roller portions 632 and 642, and the elevating cords C1, C2 and C3 move in the other direction. When doing so, the narrow pressure state of the pair of roller portions 632, 642 is relaxed (as non-narrow pressure), and the elevating cords C1, C2, and C3 are sandwiched.

That is, in the example of the present embodiment, the pair of roller portions 632 and 642 by the idle roller 63 and the drive roller 64 are pivotally supported by the top wall groove 621 and the bottom wall groove 622 of the slider 62, respectively, and the case member 61. Since it is guided by the pair of shaft holes 613 and the pair of shaft holes 692 of the base member 69, when the elevating cords C1, C2, and C3 move to the left (the rail support side by the bottom rail 4). (See FIG. 3), the slider 62 also slides in the same direction and is guided so that the distance between the pair of roller portions 632 and 642 is narrowed, so that the pair of roller portions 632 and 642 are pressed narrowly and the elevating cord is concerned. C1, C2 and C3 will be sandwiched.

On the other hand, when the elevating cords C1, C2, and C3 move to the right (operation side) (see FIG. 3), the slider 62 slides to the right (operation side), and the pair of roller portions 632,642 By being guided so that the distance between them is increased, the narrow pressure state due to the pair of roller portions 632, 642 is relaxed (as non-narrow pressure), and the elevating cords C1, C2, and C3 are sandwiched.

Therefore, when the bottom rail 4 and the slat 3 are lowered by the movement of the elevating cords C1, C2, and C3, the slider 62 also slides in the same direction due to the movement of the elevating cords C1, C2, and C3, and is paired. By being guided so that the distance between the roller portions 632 and 642 is narrowed, the pair of roller portions 632 and 642 are compressed to sandwich the elevating cords C1, C2 and C3, and the elevating cords C1, C2 and C3 are unidirectional. It becomes a narrow pressure state that can limit the movement speed. As a result, when the pulling operation of the elevating cords C1, C2, C3 (or the operation code 7 or the code equalizer 8) is stopped, the operation of the stopper device 15 is released, and the slats 3 descend by their own weight, a pair of speed adjusters 6S. It is realized that the distance between the roller portions 632 and 642 is close to each other and a narrow pressure state, that is, a high friction state is generated, a braking force is generated, and the bottom rail 4 and the slat 3 are smoothly and appropriately lowered. To.

On the other hand, when the bottom rail 4 and the slat 3 are raised by the movement of the elevating cords C1, C2 and C3, the narrow pressure state due to the pair of roller portions 632 and 642 due to the movement of the elevating cords C1, C2 and C3 is alleviated. Then (as non-narrow pressure), the elevating cords C1, C2, and C3 are sandwiched. As a result, when the bottom rail 4 and the slat 3 are raised based on the pulling operation of the elevating cords C1, C2, C3 (or the operation code 7 or the code equalizer 8), between the pair of roller portions 632 and 642 in the speed regulator 6S. The distance is separated and the open state, that is, the non-narrow pressure state is established, and the slat 3 is smoothly ascended.

As a result, with respect to the code to be speed-adjusted (in this example, the elevating code C1, C2, C3), a braking force is generated only when moving in one direction, and the load of the code is reduced when moving in the other direction. It is possible to suppress an increase in code deterioration and deterioration in operability.

By the way, as described above, the base member 69 and the case member 61 in the speed regulator 6S shown in FIGS. 3 and 4 have a braking mechanism (slider 62, coil spring SP, idle roller 63, drive roller 64, carrier with gears 65). , An annular plate 66, a weight holder 67 with a sun gear, and a weight 68), which constitutes a housing that encloses and accommodates the ring plate 66, and a pair of shafts formed as through holes on the upper surface of the case member 61. The hole 613 and the guide portion 616 for guiding the slider 62 are formed as holes that directly pass from the outside to the inside at appropriate positions on the side surface or the corner portion of the case member 61. However, if such a speed adjuster 6S is installed as it is in a head box 1 having an open upper portion as shown in FIG. 2, dust enters the inside of the speed adjuster 6S from the shaft hole 613 or the guide portion 616. , The movement of each roller (idle roller 63 and drive roller 64) may be deteriorated and the performance may be deteriorated. The speed adjuster 6S and the shielding material are supported by a support having a substantially L-shaped or T-shaped cross section or an I-shaped cross section having an open upper portion without using the head box 1 having a substantially U-shaped cross section having an open upper portion. There is also a form of shielding device. Even in such a case, dust may enter the inside of the speed regulator 6S, and the movement of each roller (idle roller 63 and drive roller 64) may be impaired, resulting in performance deterioration. Therefore, when at least the upper portion of the frame body (head box 1 or the support body) that supports the shielding material is open, it is necessary to devise a method to prevent dust from entering the inside of the speed adjuster 6S as much as possible.

Therefore, as shown in FIGS. 5A and 5B, the speed adjusting device 6 of the first embodiment has an upper portion of the housing (base member 69 and case member 61) of the speed adjusting device 6S except for the cord insertion hole 614. And the upper cover 71 having a shape for closing the hole portion (shaft hole 613 and guide portion 616) on the side portion is provided.

(Top cover 71)
5 (a) and 5 (b) are perspective views showing a schematic configuration of the speed adjusting device 6 of the first embodiment according to the present invention, respectively. First, as shown in FIG. 5B, the speed adjusting device 6 of the first embodiment has the upper portion and the side portion of the housing (base member 69 and case member 61) of the speed adjusting device 6S except for the cord insertion hole 614. An upper cover 71 having a shape for closing the holes (shaft hole 613 and guide portion 616) is provided.

As shown in FIG. 5A, the upper cover 71 of this example has a box-like shape with a lower opening so that it can be covered from the upper part of the housing (base member 69 and case member 61) of the speed regulator 6S. There is no hole in the upper surface 71a, there is no hole in the front-rear side of the surrounding side surface 71b, and the cord insertion hole 614 of the speed regulator 6S is in the front-rear side of the surrounding side surface 71b. Notches 71c are formed at the corresponding positions to avoid interference with the elevating cords C1, C2, and C3. In addition, projecting pieces 71e projecting upward are formed at the four corners of the upper surface 71a, and these projecting pieces 71e are used in the head box 1 when the speed adjusting device 6 of the first embodiment is arranged in the head box 1. It is supposed to be engaged with the front and rear walls to suppress rattling, but it is not always necessary to provide it if such rattling does not occur.

Although not shown, the upper part of the inner wall of the upper cover 71 has a shape that does not interfere with the function of the speed regulator 6S, and is in contact with the upper surface of the housing of the speed regulator 6S (the upper surface of the case member 61). Has a joint site. Further, although not shown, the side portion of the inner wall of the upper cover 71 has an engaging portion that engages with the outer wall of the housing of the speed regulator 6S (the outer wall of the upper cover 71), and the speed is adjusted. The rattling of the vessel 6S does not occur. These engaging portions may have any shape that matches the shape of the housing of the speed regulator 6S as long as the shape does not impair the function of the speed regulator 6S. However, the upper part of the inner wall of the upper cover 71 has a shape that does not interfere with the function of the speed regulator 6S, and does not have an engaging portion that comes into contact with the upper surface of the housing of the speed regulator 6S (the upper surface of the case member 61). In addition, it may be disengaged. Further, the side portion of the inner wall of the upper cover 71 does not have an engaging portion that engages with the outer wall of the housing of the speed regulator 6S (the outer wall of the upper cover 71), and even if it is not engaged. good. That is, the internal shape of the upper cover 71 can be any shape that matches the shape of the housing of the speed regulator 6S as long as it does not interfere with the function of the speed regulator 6S. Further, the front / rear / left / right lower edges 71d of the upper cover 71 may be supported by abutting a part of the housing of the speed regulator 6S, but in this example, the diameter is made larger than that of the housing of the speed regulator 6S. Even when the housing of the speed regulator 6S is surrounded, it has an open edge. The outer shape of the upper cover 71 shown in FIG. 5A is a square box shape, but may be a round or elliptical box shape, or a triangular or pentagonal or more polygonal box shape.

Since the upper cover 71 of this example has a notch 71c formed, the elevating cords C1, C2, and C3 can be attached to and detached from above the speed regulator 6S while the elevating cords C1, C2, and C3 are inserted into the cord insertion holes 614. The speed adjuster 6 of the first embodiment is configured by covering the speed adjuster 6S with the upper cover 71. The speed adjusting device 6 of the first embodiment shown in FIG. 5B in which the upper cover 71 is put on the speed adjusting device 6S has a housing (base member 69 and a case member 61) of the speed adjusting device 6S except for the cord insertion hole 614. It closes the upper and side holes (shaft hole 613 and guide portion 616).

In the upper cover 71, instead of using the notch 71c, a cord insertion hole for avoiding interference with the elevating cords C1, C2, and C3 may be used (not shown). In this case, the elevating cords C1, C2, and C3 cannot be detachably covered from above the speed regulator 6S with the cord insertion holes 614 inserted, and can be detached from above the speed regulator 6S. The elevating cords C1, C2, and C3 will be inserted after they are covered or can be covered, but the elevating cord C1 to be inserted through the cord insertion hole that replaces the notch 71c in the upper cover 71. , C2, C3 can be composed of a plurality of insertion holes for dividing, and in this case, the elevating cords C1, C2, and C3 can be provided with an entanglement prevention function.

In the speed adjusting device 6 of the first embodiment configured by using the upper cover 71 in this way, dust enters the inside of the speed adjusting device 6S from the shaft hole 613 and the guide portion 616, and each roller (idle roller 63 and drive). It is possible to eliminate the risk that the roller 64) will not move smoothly and the performance will deteriorate.

[Speed Adjusting Device of Example 2]
5 (c) and 5 (d) are perspective views showing a schematic configuration of the speed adjusting device 6 of the second embodiment according to the present invention, respectively, with the speed adjusting device 6S covered with the upper cover 71 and further lowered. It is shown that the speed adjusting device 6 of the second embodiment is configured by covering with 72.

As described above, the base member 61 also has a pair of shaft holes 692 formed as through holes. When there is a possibility that dust may enter the inside of the speed regulator 6S from this pair of shaft holes 692, the speed regulator 6S shown in FIG. 5B is covered with the upper cover 71, and the lower cover is further covered. 72 is covered (see FIG. 5 (c)).

(Bottom cover 72)
As shown in FIG. 5C, the lower cover 72 of this example is from the lower part of the housing (base member 69 and case member 61) of the speed regulator 6S with the upper cover 71 covered on the speed regulator 6S. It has a box-like shape with an upper opening so that it can be covered, and has no holes on the lower surface 72a and no holes on the surrounding side surfaces 72b. In addition, projecting pieces 72c projecting upward are formed at the four corners of the lower surface 72a, and these projecting pieces 72c engage with the four corners of the inner wall of the upper cover 71, and lower the front and rear / left and right lower edges 71d of the upper cover 71. The front, rear, left and right upper edges 72d of the cover 72 come into contact with each other so that the speed adjuster 6S can be enclosed without rattling.

A square frame 72e is provided at the bottom of the lower surface 72a of the lower cover 72 of this example, and is provided on the bottom wall of the headbox 1 when the speed adjusting device 6 of the second embodiment is arranged in the headbox 1. It is intended to suppress rattling by engaging with the opening hole, but if such rattling does not occur, it is not always necessary to provide the square frame 72e.

The outer shape of the lower cover 72 shown in FIG. 5C is a square box shape, but may be a round or elliptical box shape, or a triangular or pentagonal or more polygonal box shape.

As described above, the speed adjusting device 6 of the second embodiment shown in FIG. 5D in which the upper cover 71 and the lower cover 72 are covered with the speed adjusting device 6S is the housing of the speed adjusting device 6S except for the cord insertion hole 614. It closes the upper and side portions of the base member 69 and the case member 61), as well as the lower holes (shaft holes 613, 692 and guide portion 616).

The speed adjusting device 6 of the second embodiment configured by using the upper cover 71 and the lower cover 72 as described above has a braking mechanism (slider 62, coil spring SP, idle roller 63, drive roller 64, carrier with gears 65, and annular shape. It has a cover having only a notch 71c (or an insertion hole) for inserting the elevating cords C1, C2, and C3 as a hole for directly communicating from the outside to the plate 66, the weight holder 67 with a sun gear, and the weight 68). It is possible to eliminate the possibility that dust enters the inside of the speed regulator 6S from the shaft holes 613 and 692 and the guide portion 616, and the movement of each roller (idle roller 63 and drive roller 64) becomes poor and the performance deteriorates.

[Speed Adjusting Device of Example 3]
6 (a) and 6 (b) are perspective views showing a schematic configuration of a case member 61G and a base member 69G constituting the speed adjusting device 6 of the third embodiment according to the present invention, respectively. Further, FIG. 7 is a perspective view showing a schematic configuration of the speed adjusting device 6 according to the third embodiment of the present invention. The same reference numbers are given to the components similar to the speed adjusting devices 6 of the above-mentioned Examples 1 and 2.

In the speed adjusting device 6 of Examples 1 and 2 described above, a mode is described in which the upper cover 71 and further the lower cover 72 are used to prevent dust from entering the speed adjuster 6S shown in FIGS. 3 and 4. However, the case member 61 and the base member 69 of the speed regulator 6S shown in FIGS. 3 and 4 are replaced with the case member 61G and the base member 69G shown in FIGS. The speed adjusting device 6 of the third embodiment can be configured to prevent the entry of the speed.

Compared with the case member 61 shown in FIG. 4, the case member 61G shown in FIG. 6A is changed to a groove-shaped drilling groove 613G in which the shaft hole 613 formed by the through hole is bored non-penetratingly. The difference is that the guide portion 616 for guiding the slider 62 is formed instead of the drilled groove 616G, and the other shapes are the same.

Further, the base member 69G shown in FIG. 6B has a groove-shaped drilling groove 692G in which the shaft hole 692 formed by the through hole is non-penetrated as compared with the base member 69 shown in FIG. The difference is that it is changed to, and the other shapes are the same.

By using the case member 61G and the base member 69G shown in FIGS. 6 (a) and 6 (b) in place of the case member 61 and the base member 69 shown in FIG. 4, a braking mechanism (slider 62, coil spring SP) is used. , Idle roller 63, drive roller 64, carrier with gear 65, annular plate 66, weight holder with sun gear 67, and weight 68). The speed adjusting device 6 of the third embodiment can be configured to have only holes and prevent dust from entering the inside.

If there is no risk of dust entering from below, only the case member 61G shown in FIG. 6A is used in place of the case member 61 shown in FIG. 4, so that dust can enter inside. It is also possible to configure the speed adjusting device 6 of the modified example in the form of preventing.

Further, the cord insertion hole 614 formed in the case member 61G can be composed of a plurality of insertion holes for dividing the elevating cords C1, C2 and C3 to be inserted, and in this case, the elevating cords C1, C2 and C3 may be formed. It can have an entanglement prevention function.

[Speed Adjusting Device of Example 4]
8 (a) and 8 (b) are each member (speed adjuster 6S, code guide 6M, and cover 6T shown in FIGS. 3 and 4) for constituting the speed adjusting device 6 of the fourth embodiment according to the present invention, respectively. ), And FIG. 8 (c) is a perspective view showing a schematic configuration of the speed adjusting device 6 of the fourth embodiment. The same reference numbers are given to the components similar to the speed adjusting devices 6 of the above-mentioned Examples 1 and 2.

In the speed adjusting device 6 of the fourth embodiment shown in FIG. 8C, first, the code guide 6M shown in FIG. 8A is attached to the speed adjusting device 6S shown in FIGS. 3 and 4, and then the code guide 6M shown in FIG. 8A is attached. As shown in FIG. 8B, a cover 6T that functions as an upper cover for the speed regulator 6S is attached to the code guide 6M.

The configuration of the speed regulator 6S shown in FIG. 8A is the same as that described with reference to FIGS. 3 and 4, but if further supplemented for the explanation of this embodiment, the bottom of the case member 61 On the side, projecting pieces having a "Y-shaped" cross section projecting in the left-right direction are formed. Each of the projecting pieces has a pair of guide receiving portions 617 having recesses, and a total of three guide holding portions 618 formed so as to stand upright on both sides of the pair of guide receiving portions 617 in the front-rear direction. It has. Although not shown in FIG. 8A, the elevating cords C1, C2, and C3 are inserted into the cord insertion holes 614 of the case member 61, as described above. As a result, the movement of the elevating cords C1, C2, and C3 is restricted within the predetermined speed by the speed regulator 6S.

The code guide 6M shown in FIG. 8A suppresses the entanglement of the elevating cords C1, C2 and C3 in the speed regulator 6S, and limits the speed of movement of the elevating cords C1, C2 and C3 by the speed regulator 6S. It is a member for dividing and guiding the movement paths of the elevating cords C1, C2, and C3 in the vicinity of the cord insertion hole 614 of the speed regulator 6S so as to ensure the function, and is covered from above the speed regulator 6S. Is configured to allow

More specifically, the code guide 6M accommodates most of the case member 61 of the speed regulator 6S, and has an externally shaped accommodating portion 81 that is open downward so that it can be covered from above the speed regulator 6S. is doing. Support portions 86 are formed on both sides of the bottom portion of the cord guide 6M in the left-right direction, and a pair of protrusions 87 projecting downward from the lower surface of each support portion 86 are formed. Then, when the cord guide 6M is covered from above the speed regulator 6S, the support portion 86 of the cord guide 6M is supported by a total of three guide restraint portions 618 in the speed regulator 6S. Further, the pair of protruding portions 87 of the cord guide 6M are supported by the pair of guide receiving portions 617 in the speed regulator 6S, and are sandwiched by the guide restraining portions 618 on the outer side in the front-rear direction among the total of three guide restraining portions 618. Is supported. As a result, the code guide 6M is engaged and mounted on the speed regulator 6S so as to suppress back and forth and left and right rattling.

Further, in the code guide 6M, space portions 83, 84 substantially parallel to the upper part of the support portions 86 formed on both sides of the bottom portion in the left-right direction of the code guide 6M are formed, and the space portions 83, 84 are substantially parallel in the front-rear direction. A guide bar 85 is provided in the center. The guide bar 85 of this embodiment has one guide bar 85 at the upper part of the support portion 86 on the illustrated side, but two guide bars 85 at the upper part of the support portion 86 on the other side (described later). See FIGS. 10 (b) and 10 (c).

The movement paths of the elevating cords C1, C2, and C3 are separately guided by these one or two guide bars 85 and the space portions 83, 84 in the vicinity of the cord insertion hole 614 of the speed regulator 6S. It is possible to suppress the entanglement of the elevating cords C1, C2, and C3 in the speed regulator 6S.

Engagement portions 89 protruding outward are formed on the tops of the trapezoidal wall portions 88 at the front and rear of the upper side of the cord guide 6M, and are connected so as to maintain the strength of each engagement portion 89. The brace wall 82 is formed. As shown in the figure, the brace wall 82 is formed in a shape in which the central portion rises in a square shape. The front and rear engaging portions 89 of the cord guide 6M are the bent portions 1c formed on the tops of the front and rear walls of the head box 1 when the speed adjusting device 6 of the fourth embodiment is arranged in the head box 1. By engaging, it is designed to suppress vertical displacement in the upward direction and lateral displacement in the front-rear direction (see FIG. 9 described later).

With reference to FIG. 8B, a cover 6T that functions as an upper cover for the speed regulator 6S is attached to the code guide 6M.

The cover 6T has a rectangular top surface 91 and a pair of projecting pieces 94 protruding downward in front of and behind the top surface 91, and a notch 93 is formed in a substantially central portion of each projecting piece 94 in the left-right direction. There is. Further, engaging portions 95 are formed so as to project outward at both ends of each projecting piece 94 in the left-right direction. The rectangular top surface 91 has an engaging hole 92 in a substantially central portion thereof that closely engages with the central portion of the cord guide 6M that rises in the direction of the brace wall 82 in the front-rear and left-right directions.

In the cover 6T, the front and rear projecting pieces 94 are sandwiched between the front and rear wall portions 88 of the cord guide 6M, and the notches 93 of the front and rear projecting pieces 94 engage with the brace wall 82, and the top surface 91. The engaging hole 92 provided in the substantially central portion of the above is closely engaged with the central portion of the cord guide 6M that rises in the square shape of the brace wall 82 in the front-rear and left-right directions. Therefore, the cover 6T has a first engaging means (an engaging piece having a notch 93 and an engaging hole 92 on the top surface 91) that suppresses rattling back and forth and left and right with respect to the cord guide 6M. ing.

Further, the engaging portions 95 formed so as to project outward at both ends of each protruding piece 94 of the cover 6T in the left-right direction are the same as those of the engaging portions 89 before and after the cord guide 6M, in the fourth embodiment. When the speed adjusting device 6 is arranged in the head box 1, it engages with the bent portion 1c formed on the top of the front and rear walls of the head box 1 to prevent vertical displacement in the upward direction and lateral displacement in the front-rear direction. It is designed to be suppressed (see FIG. 9 described later). Therefore, the cover 6T has a second engaging means (engaging portion 95) that suppresses the vertical displacement in the upward direction and the lateral displacement in the front-rear direction with respect to the head box 1.

As described above, in the speed adjusting device 6 of the fourth embodiment, as shown in FIG. 8C, the code guide 6M is attached to the speed adjusting device 6S, and the speed adjusting device 6 functions as an upper cover for the speed adjusting device 6S. The cover 6T is attached to the code guide 6M.

FIG. 9 is a perspective perspective view showing a state in which the speed adjusting device 6 of the fourth embodiment according to the present invention is arranged in the head box 1.

The head box 1 has a substantially U-shaped cross section with an open upper portion and a long shape in the left-right direction. The bottom portion 1a of the head box 1 has a protrusion having a "Y-shaped" cross section having a bottom shape (a guide receiving portion 617 and a guide holding portion 618) in the speed regulator 6S constituting the speed adjusting device 6 of the fourth embodiment. An engaging hole 1b that closely engages with the portion below the piece) is formed, and rattling in the front-rear and left-right directions of the speed regulator 6S is suppressed.

When accommodating the speed adjusting device 6 of the fourth embodiment in the head box 1, first, the speed adjusting device 6S is attached by pushing the cord guide 6M from above the head box 1 in a state of being attached, and then mounting the cord guide 6M. Then, the elevating cords C1, C2, and C3 are inserted into the speed adjuster 6S and the cord guide 6M. Then, the cover 6T is attached to the cord guide 6M by pushing it from above the head box 1. Alternatively, the cord guide 6M and the cover 6T may be attached to the speed adjuster 6S, and the elevating cords C1, C2, and C3 may be inserted and attached by pushing from above the head box 1. Each protruding piece 94 of the cover 6T and each engaging portion 89 of the cord guide 6M have an inclined surface S1 and an inclined piece S2, respectively, as shown in FIG. Therefore, when the speed adjusting device 6 of the fourth embodiment is pushed in from above the head box 1, the opening of the upper portion of the head box 1 expands due to elastic deformation, or the cover 6T itself bends due to elastic deformation. Then, when the speed adjusting device 6 of the fourth embodiment is completely housed in the head box 1, the opening of the upper portion of the head box 1 is expanded or the cover 6T itself is bent due to elastic deformation to the original state. return.

In this way, when the speed adjusting device 6 of the fourth embodiment is arranged in the head box 1, as shown in FIG. 9, each protruding piece 94 of the cover 6T and each engaging portion 89 of the cord guide 6M By engaging with the bent portion 1c formed on the top of the front and rear walls of the head box 1, it is possible to suppress vertical displacement in the upward direction and lateral displacement in the front-rear direction.

10 (a) is a front view showing a schematic configuration of the speed adjusting device 6 of the fourth embodiment according to the present invention, and FIGS. 10 (b) and 10 (c) are side views of the A-view and the B-view, respectively. be. First, as shown in FIG. 10A, the cover 6T has a main body length L2 having a length protruding from both ends of the speed regulator 6S in the moving direction of the elevating cords C1, C2, and C3. The main body length L2 of the cover 6T is longer than the main body length of the speed regulator 6S, and further longer than the main body length L1 of the code guide 6M.

Further, as shown in FIGS. 10 (b) and 10 (c), when the speed adjusting device 6 of the fourth embodiment is arranged in the head box 1, as shown in FIG. 9, each protruding piece 94 of the cover 6T is 94. Can engage with the bent portion 1c formed on the top of the front and rear walls of the head box 1 to suppress vertical displacement in the upward direction and lateral displacement in the front-rear direction. Even when the bracket 100 for mounting the head box 1 on a mounting surface such as a ceiling surface is provided so as to be located at the upper part of the speed adjusting device 6 of the fourth embodiment, the cover 6T does not come into contact with the bracket 100. , Each protruding piece 94 of the cover 6T engages in the headbox 1. On the A-view code guide 6M shown in FIG. 10 (b), two guide bars 85 are used, and the elevating codes C1, C2, and C3 are inserted between them, and the B-view code shown in FIG. 10 (c) is inserted. An example of guiding the elevating cords C1, C2, and C3 from the side of the guide bar 85 with one guide bar 85 is shown on the guide 6M, but it varies depending on the configuration of the shielding device in which the speed adjusting device 6 is arranged. Code routing is available. Further, the number of guide bars 85 is not limited to one or two, and the number of guide bars 85 may be larger, and the space portions 83 and 34 may have one or three or more stages instead of two stages.

Then, the speed adjusting device 6 of the fourth embodiment is configured so that the cover 6T is located above the speed adjusting device 6S, so that the speed adjusting device 6 has a dustproof function for the speed adjusting device 6S.

More specifically, it will be described with reference to FIG. 11 (a) to 11 (d) are plan views for explaining the operation of the speed adjusting device 6 of the fourth embodiment according to the present invention, respectively. In FIG. 11, the elevation codes C1, C2, and C3 are not shown.

First, as shown in FIG. 11A, the speed regulator 6S alone has a braking mechanism that limits the moving speed of the elevating cords C1, C2, and C3 in one direction, and the elevating cords C1, C2, and C3. It has a cord insertion hole 614 to be inserted and has a housing for accommodating the braking mechanism, but the shaft hole 613 and the guide portion 616 are formed as holes that directly pass from the outside to the inside. If such a speed adjuster 6S is installed in, for example, a head box 1 having an open upper portion, dust may enter the inside from the shaft hole 613 or the guide portion 616, and the braking mechanism may not move smoothly, resulting in performance deterioration. There is.

Subsequently, with reference to FIG. 11B, even when the cord guide 6M is attached to the speed regulator 6S, the cord guide 6M is provided with holes and gaps in various places due to molding reasons. Dust may enter the inside from the shaft hole 613 or the guide portion 616, and the braking mechanism may not move properly, resulting in deterioration of performance.

Therefore, referring to FIG. 11C, by attaching the code guide 6M to the speed regulator 6S and further attaching the upper cover 6T, dust is collected inside from the shaft hole 613 and the guide portion 616. Can be almost suppressed from entering.

In addition, referring to FIG. 11 (c), by accommodating the cord guide 6M and the upper cover 6T in the head box 1 with the speed regulator 6S attached, the shaft hole 613 and the guide portion 616 are accommodated. It is possible to almost completely suppress the entry of dust inside.

As described above, the speed adjusting device 6 of the fourth embodiment is configured so that the cover 6T is located above the speed adjusting device 6S, so that the speed adjusting device 6 has a dustproof function with respect to the speed adjusting device 6S.

In the speed adjusting device 6 of the fourth embodiment shown in FIGS. 8 to 11, a code guide 6M for guiding the movement of the elevating cords C1, C2, and C3 is provided between the cover 6T and the speed adjusting device 6S. , The example in which the cord guide 6M is detachably attached to the housing of the speed regulator 6S and the cover 6T is detachably attached to the cord guide 6M has been described, but it is necessary to limit this. There is no. For example, the cover 6T may be provided as an integral member with the cord guide 6M and may be detachably attached to the housing of the speed regulator 6S.

Further, the cover 6T can be detachably attached to the housing of the speed regulator 6S having a code guidance function equivalent to that of the code guide 6M. By making the cover 6T removable from the cord guide 6M or the speed regulator 6S, the speed regulator 6S is shared, for example, when the speed regulator 6S is mounted on a head box whose upper portion is not open. It will be possible to contribute to the overall cost reduction.

[Speed Adjusting Device of Example 5]
12 (a) and 12 (b) are perspective views showing a schematic configuration of the speed adjusting device 6 of the fifth embodiment according to the present invention, respectively. The same reference numbers are assigned to the same components as those of the speed adjusting device 6 of each of the above-described embodiments.

The speed adjusting device 6 of the fifth embodiment shown in FIGS. 12 (a) and 12 (b) has a cord insertion hole 614 similar to the speed adjusting device 6 of the first embodiment shown in FIGS. 5 (a) and 5 (b) described above. Except for, the upper cover 71 having a shape for closing the upper and side holes (shaft hole 613 and guide portion 616) of the housing (base member 69 and case member 61) of the speed regulator 6S is provided.

The upper cover 71 in the speed adjusting device 6 of the fifth embodiment shown in FIGS. 12A and 12B is compared with the upper cover 71 of the speed adjusting device 6 of the first embodiment shown in FIGS. 5A and 5B. The shape and structure itself are the same, but they differ in that the relative size with respect to the speed regulator 6S is slightly reduced.

That is, in the description according to FIG. 5, in the upper cover 71 in the speed adjusting device 6 of the first embodiment, as described above, the front / rear / left / right lower edges 71d of the upper cover 71 are larger than the housing of the speed adjusting device 6S. An example in which the diameter is increased and the speed regulator 6S has an open edge even when the housing is surrounded by the speed regulator 6S has been described. However, also in the description according to FIG. 5, it is described that the upper cover 71 may abut and support a part of the housing of the speed regulator 6S.

Therefore, in the upper cover 71 in the speed adjusting device 6 of the fifth embodiment shown in FIG. 12, at least the front and rear lower edges 71d of the front / rear / left / right lower edges 71d of the upper cover 71 are the housing of the speed regulator 6S. This is an example in which the upper cover 71 is engaged with a part of the housing of the speed regulator 6S so as to abut and support the part.

More specifically, the upper cover 71 according to the fifth embodiment shown in FIG. 12A has an opening below so that it can be covered from the upper part of the housing (base member 69 and case member 61) of the speed regulator 6S. It has a box-like shape, has no holes in the upper surface 71a, has no holes in the front-rear side of the surrounding side surface 71b, and has no holes in the front-rear side of the surrounding side surface 71b. It is the same as the first embodiment in that the notch 71c for avoiding the interference with the elevating cords C1, C2, and C3 is formed at the position corresponding to the cord insertion hole 614. Further, in the upper cover 71 according to the fifth embodiment shown in FIG. 12 (a), projecting pieces 71e projecting upward are formed at the four corners of the upper surface 71a, and these projecting pieces 71e are the speed adjusting devices of the first embodiment. It is the same as the first embodiment in that when 6 is arranged in the head box 1, it engages with the front and rear walls of the head box 1 to suppress rattling.

However, in the upper cover 71 according to the fifth embodiment shown in FIG. 12A, the front / rear / left / right lower edges 71d of the upper cover 71 abut and support a part of the housing of the speed regulator 6S. This is an example in which the upper cover 71 is engaged with a part of the housing of the speed regulator 6S.

As shown in FIG. 12A, the bottom side of the case member 61 constituting the housing of the speed regulator 6S has a “Y-shaped” cross section protruding in the left-right direction thereof, and the guide holding portion 618 is provided. Although the protruding piece is formed, the protruding piece 619 is formed in a slightly flat plate shape even in the front-rear direction on the bottom side of the case member 61. The configuration itself of the speed regulator 6S shown in FIG. 12A is the same as shown in each of the above-described embodiments.

Therefore, in the upper cover 71 according to the fifth embodiment shown in FIG. 12A, at least the front and rear lower edges 71d of the front, rear, left and right lower edges 71d of the upper cover 71 are engaged with the upper surface of the protruding piece 619. Is supported. Here, further, the size may be such that one or both lower edges 71d on the left and right sides of the upper cover 71 are engaged with and supported by the upper surface of the corresponding guide holding portions 618 on the left and right sides.

In the upper cover 71 according to the fifth embodiment shown in FIG. 12 (a), the upper portion of the inner wall of the upper cover 71 is not shown, but has a shape that does not impair the function of the speed regulator 6S and has a speed. The regulator 6S may be disengaged without having an engaging portion abutting on the upper surface of the housing (upper surface of the case member 61). Further, in the upper cover 71 according to the fifth embodiment shown in FIG. 12 (a), the side portion of the inner wall of the upper cover 71 is not shown, but the outer wall (upper cover 71) of the housing of the speed regulator 6S. It may be disengaged without having an engaging portion that engages (the outer wall of the). That is, the internal shape of the upper cover 71 can be any shape that matches the shape of the housing of the speed regulator 6S as long as it does not interfere with the function of the speed regulator 6S. Further, also in this embodiment, the outer shape of the upper cover 71 shown in FIG. 12A is a square box shape, but it may be a round or elliptical box shape, or a triangular or pentagonal or more polygonal box shape. May be.

Since the notch 71c is also formed in the upper cover 71 of this example, the elevating cords C1, C2, and C3 are attached and detached from above the speed regulator 6S while being inserted into the cord insertion hole 614. The speed adjuster 6 of the fifth embodiment is configured by covering the speed adjuster 6S with the upper cover 71. In the speed adjusting device 6 of the fifth embodiment shown in FIG. 12B in which the upper cover 71 is put on the speed adjusting device 6S, the housing (base member 69 and the case member 61) of the speed adjusting device 6S is removed except for the cord insertion hole 614. It closes the upper and side holes (shaft hole 613 and guide portion 616).

In addition, in the upper cover 71 of this example, as mentioned in the first embodiment, instead of using the notch 71c, a cord insertion hole for avoiding interference with the elevating cords C1, C2, and C3 may be used (FIG. Not shown). In this case, the elevating cords C1, C2, and C3 cannot be detachably covered from above the speed regulator 6S with the cord insertion holes 614 inserted, and can be detached from above the speed regulator 6S. The elevating cords C1, C2, and C3 will be inserted after they are covered or can be covered, but the elevating cord C1 to be inserted through the cord insertion hole that replaces the notch 71c in the upper cover 71. , C2, C3 can be composed of a plurality of insertion holes for dividing, and in this case, the elevating cords C1, C2, and C3 can be provided with an entanglement prevention function.

In the speed adjusting device 6 of the fifth embodiment configured in this way, dust enters the inside of the speed adjusting device 6S from the shaft hole 613 and the guide portion 616, and the movement of each roller (idle roller 63 and drive roller 64) moves. It is possible to eliminate the risk of deterioration and performance degradation.

[Speed Adjusting Device of Example 6]
13 (a) and 13 (b) are perspective views showing a schematic configuration of the speed adjusting device 6 according to the sixth embodiment of the present invention, respectively. The same reference numbers are assigned to the same components as those of the speed adjusting device 6 of each of the above-described embodiments.

First, the speed adjusting device 6 of the sixth embodiment shown in FIG. 13B is paired with respect to the speed adjusting device 6S shown in FIGS. 3 and 4 in the left-right direction as shown in FIG. 13A. The cord guides 6M-1 and 6M-2 are separately and independently arranged, and subsequently, the cover 6T which functions as an upper cover for the speed regulator 6S engages with the cord guides 6M-1 and 6M-2. It consists of being worn. The configuration itself of the speed regulator 6S shown in FIG. 13A is the same as shown in each of the above-described embodiments.

The structure itself of the cover 6T illustrated in FIG. 13 (b) shows an example similar to the upper cover 71 shown in FIG. 5 (a) or FIG. 12 (a). In the cover 6T of this embodiment, the pair of cord guides 6M-1 and 6M-2 are separated from each other and are not in contact with the speed regulator 6S.

The code guides 6M-1 and 6M-2 exemplified in FIG. 13B each have a main body portion 80 having a substantially convex structure when viewed from the front-rear direction, and each code guide 6M-1 has a substantially convex shape. , 6M-2 main body 80 is formed with substantially parallel space portions 83, 84. A bifurcated locking claw 80a is formed on the bottom surface of the main body 80 of each pair of cord guides 6M-1 and 6M-2 in this example, and the bifurcated locking claw 80a is used as a head box. By inserting and locking the support hole (not shown) provided in the head box 1, the head box 1 can be fixedly placed.

Further, two guide bars 85 are provided at substantially the center of the space portions 83 and 84 in the main body portion 80 of each code guide 6M-1 and 6M-2 in the front-rear direction. The movement paths of the elevating cords C1, C2, and C3 are separately guided by these one or two guide bars 85 and the space portions 83, 84 in the vicinity of the cord insertion hole 614 of the speed regulator 6S. It is possible to suppress the entanglement of the elevating cords C1, C2, and C3 in the speed regulator 6S.

In addition, each code guide 6M-1, 6M-2 shown in FIG. 13A is an example in which each elevating code C1, C2, C3 is appropriately divided and guided by using two or one guide bars 85. As shown, various cord handling can be used depending on the configuration of the shielding device in which the speed adjusting device 6 is arranged. Further, the number of guide bars 85 is not limited to one or two, and the number of guide bars 85 may be larger, and the space portions 83 and 34 may have one or three or more stages instead of two stages.

The cover 6T illustrated in FIG. 13B is supported by engaging the upper surface of the main body 80 of each code guide 6M-1 and 6M-2 with the upper portion of the inner wall of the upper cover 71. It is supposed to be. However, the internal shape of the cover 6T can be any shape that matches the shape of the housing of the speed regulator 6S as long as it does not interfere with the function of the speed regulator 6S.

Further, the cover 6T can be configured to be engaged with a part of any part of each code guide 6M-1 and 6M-2 as long as the cover 6T has a shape that does not interfere with the function of the speed regulator 6S.

Further, the structure itself of the cover 6T shown in FIG. 13 (b) shows an example similar to that of the upper cover 71 shown in FIG. 5 (a) or FIG. 12 (a), but is illustrated in FIG. 8 (b). By applying the above-mentioned shape and engaging the cord guides 6M-1 and 6M-2 so as to be located above the speed regulator 6S, the speed regulator 6S shall have a dustproof function. It is not always necessary to cover the speed regulator 6S. Further, as a modification of the cover 6T shown in FIG. 13B, the cover 6T may be engaged with only one of the cord guides 6M-1 and 6M-2, or the cover 6T may be engaged with only one of the cord guides 6M-1 and 6M-1. At the same time as engaging with either one or both of the 6M-2, the speed regulator 6S may also be engaged.

In the speed adjusting device 6 of the sixth embodiment configured in this way, dust enters the inside of the speed adjusting device 6S from the shaft hole 613 and the guide portion 616, and the movement of each roller (idle roller 63 and drive roller 64) moves. It is possible to eliminate the risk of deterioration and performance degradation.

Although the present invention has been described above with reference to examples of specific embodiments, the present invention is not limited to the examples of the above-described embodiments, and can be variously modified without departing from the technical idea. For example, in the example of the above-described embodiment, the example of the horizontal blind in which the elevating cord that moves as the cord related to the pulling operation is the target of speed conversion has been described, but the movement of the cord for moving the shielding material causes the shielding material to move. Horizontal blinds, pleated screens, Roman shades, vertical blinds, accordion curtains, roll screens, etc. that can open and close the shielding material by manually operating the other direction as a mechanical automatic operation that adjusts the speed in one of the opening and closing directions. As long as it is a shielding device, the speed adjusting device 6 according to the present invention can be applied. Further, although the speed adjusting device having a centrifugal brake type structure in which the mixing of dust tends to be a problem has been mainly described, the speed adjusting device having another brake structure can also be applied.

According to the present invention, a speed adjusting device having a casing structure for preventing dust from entering inside is configured to limit the moving speed of a cord moving in one direction and keep the moving speed of the shielding material below a certain value. Therefore, it is useful for a shielding device that opens and closes a shielding material as the cord moves.

1 Headbox C1, C2, C3 Lifting cord (traction cord)
3 Shielding material (slat)
4 Bottom rail 5 Support member 6 Speed adjuster 6M Code guide 6S Speed adjuster 6T cover (top cover)
6a Brake part 7 Operation code 8 Code equalizer 61,61G Case member (housing)
62 Slider SP Coil spring 63 Idle roller 64 Drive roller 65 Geared carrier 66 Ring plate 67 Sun geared weight holder 68 Weight 69,69G Base member (housing)
71 Cover (top cover)
72 cover (lower cover)
614 Cord insertion hole 616 Guide part 613,692 Shaft hole 613G, 692G Drilling groove 631 Roller shaft 632 Roller part 641 Roller shaft 642 Roller part

Claims (7)

A speed adjusting device that limits the moving speed of a predetermined cord used for opening and closing the shielding material in a shielding device in one direction and brakes the moving speed of the shielding material to a certain value or less.
A braking mechanism that limits the speed of movement of the predetermined cord in one direction, and a speed regulator having a cord insertion hole for inserting the predetermined cord and having a housing for accommodating the braking mechanism.
A code guide that guides the movement of the predetermined code and
A cover having a dustproof function against the speed regulator by engaging the speed regulator so as to be located above the speed regulator.
A speed adjusting device characterized by being provided with. The speed adjusting device according to claim 1, wherein the cover has a main body length of a length protruding from both ends of the speed adjusting device in the moving direction of the predetermined cord. The cord guide is detachably attached to the housing of the speed regulator.
The speed adjusting device according to claim 1 or 2, wherein the cover is detachably attached to the cord guide. The speed adjustment according to claim 3, wherein the cover has a first engaging means for engaging with the cord guide so as to cover the cord guide from above while suppressing lateral displacement in the front-rear and left-right directions. Device. The cover is provided as an integral member with a cord guide for guiding the movement of the predetermined cord, and is detachably attached to the housing of the speed regulator according to claim 1 or 2. The speed adjusting device according to 2. The cover engages in a second engagement within the headbox so as to suppress upward longitudinal displacement and longitudinal lateral displacement without protruding from above the headbox in which the speed adjuster is housed and installed. The speed adjusting device according to any one of claims 1 to 5, further comprising means. A shielding device that opens and closes the shielding material by moving a predetermined cord.
The speed adjusting device according to any one of claims 1 to 6, which limits the moving speed of the predetermined cord in one direction and brakes the moving speed of the shielding material to a certain value or less.
With a frame body for supporting the shielding material,
A shielding device characterized in that the speed adjusting device is disposed in the frame body having at least an open upper portion.

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