JP2019194415A - Cord brake device and shading device having cord brake device - Google Patents

Abstract

To prevent cords from being counterchanged vertically at a cord capturing section of a cord brake device for restricting the movements of a plurality of cords that raise/lower shading members of a shading device.SOLUTION: A plurality of cords CD are caused to pass, in an intersection manner, through a cord capturing section for clamping and regulating the cords CD by a drive roller 32 and an idle roller 33. Also, the directions of tensions generated in the plurality of cords CD between an entrance portion and an exit portion of the cord capturing section are made different. The intersection of the plurality of cords CD can be achieved by dividing an operating side guide port 91 and a manipulation side guide port 92 of a cord guide 9 into an appropriate number of sections and guiding the cords CD to the sections.SELECTED DRAWING: Figure 47

Description

  The present invention relates to a cord braking device and a shielding device including the cord braking device.

  Shielding devices such as horizontal brands and pleated screens switch between lighting and shading by raising and lowering the shielding material. For example, in a horizontal blind, a bottom rail is suspended from a head box by a lifting / lowering cord, and a plurality of slats are disposed between the bottom rail and the head box. By pulling up the lifting / lowering cord, the bottom rail and the slat rise, and the light can be taken from the window. The lifting / lowering cord is locked by the locking device, and the bottom rail or the like does not fall without performing restraint such as gripping the operation cord connected to the lifting / lowering cord. When light shielding such as a window is performed, the bottom rail is lowered. The lock device is released by slightly pulling the operation cord, and the bottom rail is lowered by its own weight. At this time, if it is left to the natural fall of the bottom rail, it may fall at a high speed and possibly collide with a window frame or the like vigorously.

  In order to prevent the bottom rail from dropping at a high speed, as disclosed in Patent Document 1, a braking device for restricting the movement of the lifting / lowering cord is used. That is, when the lifting / lowering cord is to fall naturally, the lifting / lowering cord is captured and the movement of the lifting / lowering cord is braked.

WO 2016/194642 A1

  In order to stabilize the movement of the lifting / lowering cord described above, a movement guide device that guides the lifting / lowering cord passing through the cord braking device is assembled to the cord braking device. In Patent Document 1, a first front groove 201 and a second front groove 202 are formed in the front wall portion 205 of the alignment member 200 that is a movement guide device. The rear wall 206 is formed with a first rear groove 203 and a second rear groove 204. The code CD is inserted into the first front groove 201, the second front groove 202, the first rear groove 203, and the second rear groove 204 to adjust the direction of the code CD, and the plurality of code CDs are aligned in the same direction. ing. In the alignment member 200 included in the configuration disclosed in Patent Document 1, the cords can be aligned vertically.

  By the way, in the raising / lowering cord which raises / lowers a shielding material, since the length from the code braking device to the position which suspends the shielding material differs, the magnitude | size of the load concerning each raising / lowering cord differs. For this reason, there is a risk that the vertical positional relationship of the lifting / lowering cords may be switched inside the cord braking device due to the difference in the size of the load. There is a risk of impairing stability. In particular, when three or more cords pass through the cord braking device, the opportunity for replacement increases.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a cord braking device and a shielding device including the cord braking device that prevent a plurality of cords passing through the cord braking device from changing their vertical relationship.

  In order to solve the above-described problem, according to a first aspect of the present invention, a cord braking device includes a plurality of cord braking devices that reduce the moving speed of the shielding member in one direction of the shielding member. And a code capturing unit that restricts movement of the code, and the code capturing unit passes through the code capturing unit in a state where the plurality of codes intersect.

  In order to solve the above problem, according to a second aspect of the present invention, in a cord braking device that reduces the moving speed of the shielding material in one direction of the shielding material hanging the shielding material, A cord and a cord catching part that regulates the movement of the cord are provided, and the directions of tension acting on the plurality of cords that pass through the cord catching part are made different from each other.

  Further, according to another aspect of the present invention, in the above-described invention, the tension of the plurality of cords includes an entry side to the cord capture unit and a exit side from the code capture unit when passing through the cord capture unit. Preferably occurring between.

  According to another aspect of the present invention, in the above-described invention, it is preferable that a movement guide device is assembled to the cord braking device and the direction of a plurality of cords is guided by the movement guide device.

  In order to solve the above-mentioned problem, according to a third aspect of the present invention, in a cord braking device that reduces the moving speed of the shielding material in one direction of the shielding material hanging the shielding material, A cord capturing section including a cord, a rotating roller that captures the cord that moves and regulates the movement of the cord, and a movement guide device that is assembled to the cord braking device. Each of the operation side guide port and the action side guide port for the braking device is divided into a plurality of sections by a longitudinal section member in a direction parallel to the rotation axis of the roller, and each of the plurality of cords is operated on the operation side guide. An operation side passage section in the mouth and an action side passage section in the action side guide opening at a position not facing the operation side passage section, and the cord catching portion is connected to the plurality of cords. There has been characterized in that it passes on and intersecting.

  Further, according to another aspect of the present invention, in the above-described invention, a lateral partition member intersecting with the longitudinal partition member is arranged to divide the operation side guide port and the action side guide port vertically and horizontally. Is preferable.

  In another aspect of the present invention, a plurality of the longitudinal partition members are preferably provided in the above-described invention.

  Moreover, the other side surface of this invention WHEREIN: It is preferable in the above-mentioned invention that the number of divisions of the said operation side passage division and the action side passage division differs.

  In addition, according to another aspect of the present invention, in the above-described invention, when three or more cords are allowed to pass, upper compartments or lower compartments partitioned by a lateral partition member that intersects with the longitudinal partition member. It is preferable that the passing codes intersect at the code capturing unit.

  In another aspect of the present invention, in the above-described invention, it is preferable that one cord is guided in each of the divided sections.

  According to another aspect of the present invention, in the above-described invention, the plurality of cords are preferably overlapped in a direction perpendicular to a moving direction of the cords in the cord capturing unit.

  In addition, in another aspect of the present invention, in the above-described invention, it is preferable that the planes including the longitudinal direction of the plurality of cords in the cord capturing portion are parallel.

  The shielding device of the present invention is characterized by including the above-described cord braking device.

  According to the cord braking device and the shielding device including the cord braking device according to the present invention, it is possible to prevent a plurality of cords passing through the cord catching portion from changing their vertical positions.

It is a disassembled perspective view explaining the cord braking device concerning one embodiment of the present invention. It is a figure which shows the cord braking device shown in FIG. 1, and is the perspective view which looked at the cord braking device in the state which assembled | attached the code guide from the action | operation side. It is a perspective view which shows the state seen from the operation side of the cord braking device shown in FIG. It is a disassembled perspective view which concerns on one Embodiment of the slider which comprises the cord braking device shown in FIG. It is a figure which shows the slider shown in FIG. 4, and is a perspective view which shows the state which looked at the slider from the action | operation side. It is a figure which shows the slider shown in FIG. 4, and is a perspective view which shows the state which looked at the slider from the operation side. It is a perspective view which shows one Embodiment of the base which comprises the cord braking device shown in FIG. 1, and shows the state which looked at the base from the action side. It is a figure explaining the base shown in FIG. 7, and is a perspective view which shows the state which looked at the base from the operation side. It is a figure explaining the base shown in FIG. 7, and is a perspective view which shows the state which looked at the base from the downward direction. It is sectional drawing cut | disconnected and shown by the surface along line 4-4 in FIG. It is a figure which shows one Embodiment of the carrier which comprises the cord braking device shown in FIG. 1, It is a perspective view which shows the state which looked at the carrier from upper direction, and has shown the planetary gear separately. It is a perspective view which shows the state seen from the downward direction of the carrier shown in FIG. 11, and has shown the planetary gear separately. It is a figure which shows other embodiment of a carrier, It is a perspective view which shows the state which looked at the carrier from upper direction, and has shown the planetary gear separately. It is a perspective view which shows the state seen from the downward direction of the carrier shown in FIG. 13, and has shown the planetary gear separately. It is a bottom view of the carrier shown in FIG. It is a perspective view which shows one Embodiment of the weight holder which comprises the cord braking device shown in FIG. 1, It is a perspective view which shows the state which looked at the weight holder from upper direction, and has shown the weight isolate | separated. It is the perspective view which shows the state seen from the upper direction of the weight holder shown in FIG. 16, and has shown the state which integrated the weight. It is a perspective view which shows the state seen from the downward direction of the weight holder shown in FIG. It is a figure which shows one Embodiment of the cap which comprises the cord braking device shown in FIG. 1, and is a perspective view which shows the state which looked at the cap from upper direction. It is a perspective view which shows the state seen from the downward direction of the cap shown in FIG. It is a perspective view which shows one Embodiment of the cord guide assembled | attached to the cord braking device shown in FIG. 1, and shows the state which looked at the code guide from the action side. It is a perspective view which shows the state seen from the operation side of the code guide shown in FIG. It is a figure which shows the cord braking device assembled by the components shown in the exploded perspective view of FIG. 1, and is a perspective view which shows the state which looked at the cord braking device from the action side. It is a perspective view which shows the state seen from the operation side of the cord braking device shown in FIG. FIG. 24 is a plan view of the cord braking device shown in FIG. 23. It is a figure explaining the power transmission path | route of the cord braking device shown in FIG. 1, and is a perspective view explaining the meshing state of the drive gear rotated by rotation of a drive shaft, and the internal gear of a carrier. It is a perspective view which shows the cross section cut | disconnected by the horizontal surface along the 1-1 line in FIG. 2, and has shown the meshing state of the drive gear and the internal gear of a carrier. It is a perspective view which shows the cross section cut | disconnected by the horizontal surface along the 2-2 line in FIG. 2, and has shown the meshing state of the planetary gear of a carrier, a fixed internal gear, and a sun gear. It is a figure explaining the power transmission path | route of the cord braking device shown in FIG. 1, and has shown the meshing state of the planetary gear and the sun gear which turn by rotation of a drive gearwheel. It is sectional drawing cut | disconnected by the vertical plane along the 3-3 line in FIG. It is a perspective view which shows the 1st Example of the blind using the cord braking device shown in FIG. FIG. 32 is a diagram for explaining a structure in which the cord braking device is incorporated in the blind according to the first embodiment shown in FIG. 31, and is a cross-sectional view of the head box cut along a horizontal plane. The case where the product width is large is shown in (B). It is a perspective view which shows the 2nd Example of the blind using the cord braking device shown in FIG. FIG. 34 is a diagram for explaining a structure in which the cord braking device is incorporated in the blind according to the second embodiment shown in FIG. 33, and is a cross-sectional view of the head box cut along a horizontal plane. The case where the product width is large is shown in (B). It is a perspective view which shows the 3rd Example of the blind using the cord braking device shown in FIG. FIG. 36 is a diagram for explaining a structure in which the cord braking device is incorporated into the blind according to the third embodiment shown in FIG. 35, and is a cross-sectional view of the head box cut along a horizontal plane. It is a perspective view which shows the 4th Example of the blind using the cord braking device shown in FIG. It is a figure explaining the structure which incorporates a cord braking device in the blind which concerns on 4th Example shown in FIG. 37, and is sectional drawing which cut | disconnected the head box at the horizontal surface. It is a figure which shows 1st Embodiment of the holding structure of the cord braking device which concerns on this invention, and is a perspective view which shows the state seen from the downward direction of the head box. It is a figure which shows 1st Embodiment of the holding structure of the cord braking device which concerns on this invention, and is a figure which shows the inside of a head box. It is a figure which shows 2nd Embodiment of the holding structure of the cord braking device which concerns on this invention, and is a figure which shows the inside of a head box. It is a figure which shows 3rd Embodiment of the holding | maintenance structure of the cord braking device which concerns on this invention, and is a figure which shows the inside of a head box. FIG. 6 is a view showing a fourth embodiment of a cord braking device holding structure according to the present invention, and showing the inside of a head box. It is a figure explaining the state which passes a raising / lowering code | cord | chord to a cord brake device, and is a front view which shows the state seen from the action | operation side of a cord brake device and the code guide assembled | attached to this cord brake device. It is a figure explaining the state which passes a raising / lowering code | cord | chord to a cord brake device, and is a rear view which shows the state seen from the operation side of the cord brake device and the code guide assembled | attached to this cord brake device. Fig. 45 is a right side view of the code guide shown in Fig. 44, illustrating a state in which the lifting / lowering cord is passed through the cord braking device. It is a figure explaining the state of one Example which passes two raising / lowering cords to a cord braking device. It is a figure explaining the state of one Example which passes three raising / lowering cords to a cord braking device. It is a figure explaining the state of one Example which passes four raising / lowering cords to a cord braking device.

  Embodiments of the present invention will be specifically described below with reference to the drawings. In this embodiment, the shielding device is a horizontal blind, and the cord whose movement is restricted by the cord braking device is described as an elevating cord.

  1 to 30 show an embodiment of a cord braking device.

  FIG. 1 is an exploded perspective view showing a cord braking device 1 according to the present invention in an exploded manner, and also includes a code guide 9 for guiding the movement of the lifting / lowering cord. The cord braking device 1 is mainly composed of a base 2, a slider 3, a carrier 4, a planetary gear 5, a slider washer 6, a weight holder 7, a weight 7a, and a cap 8. Further, a cord guide 9 is assembled to the base 2 of the cord braking device 1 so as to cover the base 2. In the slider 3, a drive roller 32 and an idle roller 33 are rotatably supported by a slider bracket 31.

  FIG. 2 is a perspective view showing a state in which the cord guide 9 is assembled to the cord braking device 1 as seen from the front side, and includes a lifting code CD. In FIG. 2, when the lifting / lowering cord CD moves in the direction indicated by the arrow P, the movement to the action side Po braked by the cord braking device 1 is assumed, and the movement in the direction indicated by the arrow Q is directed to the operation side Qi. Let's move. FIG. 3 is a perspective view showing a state where the cord guide 9 is assembled to the cord braking device 1 as seen from the rear side (that is, the operation side Qi), and also shows the lifting / lowering cord CD.

  Moreover, in each figure, when the raising / lowering code | cord | chord CD moves to the direction shown by the arrow P, let the side which comes out of the cord brake device 1 be the action side Po, and let the side which enters the cord brake device 1 be the operation side Qi. In the code guide 9, the lifting / lowering code CD is moved in and out through the action side guide port 91 and the operation side guide port 92. A description of the action side guide port 91 and the operation side guide port 92 will be described later.

(Slider 3)
The structure of the slider 3 will be described with reference to FIGS. 4, 5, and 6.
The slider 3 is configured by a slider bracket 31 and a drive roller 32 and an idle roller 33 that constitute a code catching portion that are rotatably supported. 4 is an exploded perspective view of the slider 3, and FIG. 5 is a perspective view showing a state where the slider 3 is viewed from the working side Po, that is, from the front. FIG. 6 is a perspective view showing a state where the slider 3 is viewed from the operation side Qi, that is, from the rear. As shown in FIGS. 4 and 5, a working side opening 31b through which the lifting / lowering cord CD is inserted is formed in the front wall 31a serving as the working side Po of the slider bracket 31. Further, as shown in FIG. 6, an operation side opening 31d through which the elevating cord CD is inserted is formed in the rear wall 31c serving as the operation side Qi. The working side opening 31b and the operation side opening 31d are provided at positions facing each other. In addition, a pair of spring accommodating portions 31e are formed in the rear wall 31c so as to cut out the rear wall 31c at a position sandwiching the operation side opening 31d, and the compression coil spring 34 is accommodated in the spring accommodating portion 31e. The ceiling wall 31f and the bottom wall 31g of the slider bracket 31 are elongated through holes 31f1, 31f2, which are cut from the left and right edges when viewed from the working side Po toward the center. 31g1 and 31g2 are formed. Similarly, the right and left edge portions of the ceiling wall 31f are respectively provided with positioning protrusions 31h that protrude outward at two appropriate positions.

  As shown in FIGS. 1 and 4, the drive roller 32 is a roller portion 32a, a drive shaft 32b, a washer 32c that covers the end surface of the roller portion 32a, and a power transmission member that is fitted into the lower end portion of the drive shaft 32b. And a drive gear 35 serving as a first gear. The outer peripheral surface of the roller part 32a is made of a resin having a higher friction coefficient than that of metal, for example, but the outer peripheral surface may be subjected to processing for increasing frictional force such as knurling. Such an outer peripheral surface generates a relatively large frictional force with the lifting / lowering cord CD, as will be described later. The roller portion 32a is fitted to the drive shaft 32b, and the roller portion 32a, the drive shaft 32b, and the drive gear 35 can be rotated together around the drive shaft 32b.

  As shown in FIGS. 1 and 4, the idle roller 33 has a roller portion 33a and an idle shaft 33b. The outer peripheral surface of the roller portion 33a is preferably made of a resin having a higher friction coefficient than that of metal, but may slide between the lift cord CD and may be made of metal. Further, the roller portion 33a does not need to rotate integrally with the idle shaft 33b. As will be described later, the idle roller 33 may be any one as long as the lifting / lowering cord CD can be held between the roller portion 33a and the roller portion 32a of the drive roller 32.

  5 and 6, the drive shaft 32b of the drive roller 32 is loosely inserted into the holding through hole 31f1 and the holding through hole 31g1 of the slider bracket 31, respectively. At this time, the washer 32 c is interposed between the end surface of the roller portion 32 a and the inner surface of the slider bracket 31. The drive gear 35 is located below the bottom wall 31 g of the slider bracket 31. The idle shaft 33b of the idle roller 33 is loosely inserted into the holding through hole 31f2 and the holding through hole 31g2 of the slider bracket 31.

(Base 2)
The structure of the base 2 will be described with reference to FIGS.
FIG. 7 is a perspective view showing a state where the base 2 is viewed from the working side Po, that is, the front, and FIG. 8 is a perspective view showing a state where the base 2 is viewed from the operation side Qi, that is, the rear. 9 is a perspective view of the base 2 as viewed from the bottom, and FIG. 10 is a cross-sectional view taken along line 4-4 in FIG. As shown in FIGS. 9 and 10, the base 2 is formed of a housing that can accommodate a slider 3 and a carrier 4, a planetary gear 5, a slider washer 6, a weight holder 7, and a weight 7a. The base 2 includes a slider accommodating portion 21, a carrier accommodating portion 22, a fixed internal gear 23, a cap holding portion 25, and a weight holder accommodating portion 26. The slider accommodating portion 21 is formed in a cylindrical shape whose upper planar shape is substantially square. A carrier accommodating portion 22 is formed integrally with the lower portion of the slider accommodating portion 21, and the inner surface of the carrier accommodating portion 22 is formed as a cylindrical surface that guides the outer peripheral surface of the carrier 4. A fixed internal gear 23 is integrally formed at a lower portion of the carrier accommodating portion 22, and the fixed internal gear 23 is one of power transmission members. A cylindrical weight holder accommodating portion 26 is integrally provided at the lower portion of the fixed internal gear 23.

  An operation side opening 21b is formed in the front wall 21a of the slider accommodating portion 21, and an operation side opening 21d is formed in the rear wall 21c at a position facing the operation side opening 21b. In the state where the slider 3 is accommodated in the slider accommodating portion 21, the action side opening 21 b is arranged at a position facing the action side opening 31 b of the slider 3, and the operation side opening 21 d is opposed to the operation side opening 31 d of the slider 3. It is arranged at the position to do. A cam hole 24 a and a cam hole 24 b are provided in the ceiling wall 21 e of the slider accommodating portion 21. These cam holes 24a and 24b are provided at positions sandwiching the lifting / lowering cord CD between the action side opening 21b and the operation side opening 21d. The upper part of the drive shaft 32b of the drive roller 32 and the idle shaft 33b of the idle roller 33 is loosely inserted into each of the cam holes 24a and 24b. That is, the drive roller 32 and the idle roller 33 are guided by the cam hole 24a and the cam hole 24b and can move freely. Further, the cam hole 24a and the cam hole 24b extend in a direction in which they approach each other on the working side Po and are separated from each other on the operation side Qi, and the shape formed by these cam holes 24a and 24b is almost V-shaped. A reinforcing rib cam 24c and a reinforcing rib cam 24d project from the ceiling wall 21e at the edges of the cam hole 24a and the cam hole 24b and on the side of the right side wall 21f and the left side wall 21g, respectively. The surface (sliding surface) of the reinforcing rib cam 24c on the cam hole 24a side is provided so as to be continuous with the inner surface of the cam hole 24a, and these surfaces form a cam surface 24e for guiding the drive shaft 32b. Yes. Further, the surface (sliding surface) on the cam hole 24b side of the reinforcing rib cam 24d is provided so as to be continuous with the inner surface of the cam hole 24b, and these surfaces form a cam surface 24f for guiding the idle shaft 33b. ing. As will be described later, the restoring force of the compression coil spring 34 acts so that the drive shaft 32b and the idle shaft 33b move the slider 3 in the direction pressed against the cam surfaces 24e and 24f. In this embodiment, the structure using the compression coil spring 34 as an urging means for the slider 3 is illustrated. However, for example, a torsion coil spring or other slider 3 is moved in the direction of the capture position. As long as it is energized, it is not limited to the compression coil spring 34.

  The slider accommodating portion 21 is provided with a right side wall 21f and a left side wall 21g facing each other. Among these, a locking hole 21h is formed in the right side wall 21f, and a locking hole 21i is formed in the left side wall 21g. Further, a notch window portion 21j is formed over the side wall 21f and the ceiling wall 21e, and a notch window portion 21k is formed over the left side wall 21g and the ceiling wall 21e. As shown in FIGS. 7 and 8, a pair of concave guide grooves 21m are formed on the inner side surfaces of the left and right side walls 21f and 21g from the lower end portion of the slider accommodating portion 21 to the notch window portions 21j and 21k in the vertical direction. The positioning protrusion 31h of the slider bracket 31 is movable in the guide grooves 21m. Further, in the state where the positioning projection 31h is positioned at the notch window portions 21j and 21k, the positioning projection 31h is movable along the lower edge of the notch window portions 21j and 21k. The direction is orthogonal to the direction of the guide groove 21m.

  The carrier accommodating portion 22 disposed in the lower portion of the slider accommodating portion 21 of the base 2 is formed in a cylindrical shape, and accommodates the carrier 4 in a rotatable state. The carrier 4 is guided to rotate on the inner surface of the cylindrical portion of the carrier accommodating portion 22. A cap holding portion 25 that holds the cap 8 in an engaged state is provided in the outer shape of the base 2 and below the carrier accommodating portion 22. Each of the four corners of the cap holding part 25 is formed with an arcuate locking hole 25 a centering on the rotation center O of the carrier 4. Further, a leg holding portion 25b is provided on the working side Po of the cap holding portion 25 so as to protrude to the outer peripheral side. Similarly, a leg holding portion 25c is provided on the operation side Qi of the cap holding portion 25 so as to protrude to the outer peripheral side. Is provided. Engagement weir portions 25d are provided at the left and right ends of the leg holding portions 25b and 25c, respectively. Further, a total of two locking protrusions (locking protrusions 25e and 25f) are provided in the middle part of the leg holding part 25b, and one locking protrusion (locking protrusion part 25g) is provided in the middle part of the leg holding part 25c. ) Is provided.

  The center of the fixed internal gear 23 formed in the lower part of the carrier accommodating portion 22 coincides with the rotation center O of the carrier 4.

  A cutout portion 26a is provided at the lower end portion of the cylindrical weight holder accommodating portion 26 provided at the lower portion of the cap holding portion 25 of the base 2, and the locking hole 25a described above is provided above the cutout portion 26a. Is provided.

(Carrier 4)
11 and 12 show one embodiment of the carrier 4, FIG. 11 is a perspective view showing a state of the carrier 4 as viewed from above, and FIG. 12 is a perspective view of a state of the carrier 4 as seen from below. FIG. The carrier 4 has an annular support portion 42 in which an internal gear 41 is formed and a flange portion 43 provided at the lower portion of the annular support portion 42. The internal gear 41 meshes with the drive gear 35 fitted into the drive shaft 32 b of the drive roller 32. An appropriate number of support holes 44 are formed in the flange portion 43 so as to be directed upward at an appropriate depth from the lower flange surface 43a. A part of the support hole 44 overlaps with the annular support portion 42 as shown in FIG.

  The planetary gear 5 can be freely rotated by loosely inserting the support shaft 51 of the planetary gear 5 into the support hole 44. Further, the rotation center axis of each planetary gear 5 is arranged on the same circumference around the rotation center O of the carrier 4, and the planetary gear 5 is rotated by the rotation center of the carrier 4. Revolves around. The planetary gear 5 meshes with a fixed internal gear 23 formed at the lower part of the carrier accommodating portion 22 of the base 2.

FIGS. 13 to 15 show another embodiment of the carrier 4. FIG. 13 is a perspective view showing the carrier 4 as seen from above, and FIG. 14 is a perspective view showing the carrier 4 as seen from below. FIG. FIG. 15 is a bottom view of the carrier shown in FIG. The carrier 4 has an annular support portion 42 in which an internal gear 41 is formed, and a flange portion 43 having a larger diameter than the annular support portion 42 at the lower portion of the annular support portion 42. The upper portion of the annular support portion 42 is provided with a tapered portion 42a having a conical part. The taper portion 42a improves workability when the carrier 4 is accommodated in the base 2 and reduces friction due to the rotation of the carrier 4. The internal gear 41 meshes with the drive gear 35 fitted into the drive shaft 32 b of the drive roller 32. An appropriate number of support holes 44 are formed in the flange portion 43 so as to go upward from the flange surface 43a on the lower surface side at an appropriate depth, and the support shaft 51 of the planetary gear 5 is loosely inserted into the support hole 44. Then, the planetary gear 5 is supported. Further, as shown in FIGS. 13 to 15, a part of the support hole 44 overlaps with the annular support portion 42 and is located immediately below the internal gear 41. For this reason, the diameter of the circle in which the support hole 44 is arranged can be reduced and the diameter of the revolution circle of the planetary gear 5 can be reduced compared to a structure in which a support shaft is provided in the flange portion 43 and the planetary gear is supported on the support shaft. The space for arranging the planetary gear 5 can be reduced.
In addition, a substantially arc-shaped and hollow guide projection 43 b is provided below the flange portion 43, and the outer peripheral surface of the guide projection 43 b coincides with the outer peripheral surface of the flange portion 43. The guide protrusions 43b are provided at equal intervals along the circumferential direction of the flange surface 43a, and support holes 44 are formed at portions between adjacent guide protrusions 43b. In this embodiment, six guide protrusions 43b are provided, and on the other hand, since three support holes 44 are formed at equal intervals in the circumferential direction, the guide protrusions 43b are adjacent to each other in the support hole 44. Every other part is formed in the middle.

  The planetary gear 5 can be rotated by loosely inserting the support shaft 51 of the planetary gear 5 into the support hole 44 described above. In addition, the protrusion height of the guide protrusion 43b is made smaller than the height of the lower end surface of the planetary gear 5. Further, the rotation center axis of each planetary gear 5 is arranged on the same circumference around the rotation center O of the carrier 4, and the planetary gear 5 is rotated by the rotation center of the carrier 4. Revolves around. The planetary gear 5 meshes with a fixed internal gear 23 formed at the lower part of the carrier accommodating portion 22 of the base 2. In addition, when the support shaft 51 of the planetary gear 5 is loosely inserted into the support hole 44, the planetary gear 5 can be positioned between the adjacent guide protrusions 43b, so that the support shaft 51 is guided by the guide protrusions 43b. 51 can be easily inserted into the support hole 44.

(Weight holder 7)
The weight holder 7 is shown in FIG. 16, FIG. 17, and FIG. FIG. 16 is a perspective view showing a state in which the weight holder 7 is viewed from above, and shows a state in which the weight 7a as a braking member is separated. FIG. 17 shows a state in which the weight 7 a is held by the weight holder 7. FIG. 18 is a perspective view showing the weight holder 7 in a state where the weight 7a is held as viewed from below. As for the weight holder 7, the sun gear 71 is formed in the outer peripheral surface. The sun gear 71 is formed on the outer peripheral surface of the annular sun gear portion 72, and a plurality of holding leg portions 73 are provided so as to overlap the lower end surface of the sun gear portion 72. Each holding leg portion 73 extends in the radial direction of the sun gear portion 72, and these holding leg portions 73 are arranged at equal intervals in the circumferential direction. The rotational center of the sun gear 71 coincides with the rotational center O of the carrier 4. The planetary gear 5 meshes with the sun gear 71. That is, the planetary gear 5 meshes with the fixed internal gear 23 and meshes with the sun gear 71.

  In this embodiment, the weight holder 7 includes a total of eight holding legs 73. A weight 7 a is disposed between two adjacent holding leg portions 73, and the weight holder 7 is held in a state where play is appropriately formed between the holding leg portions 73. In addition, since the base end side of the holding leg portion 73 is provided so as to overlap the lower end surface of the sun gear portion 72, the weight 7a is arranged to reach the inner diameter side of the sun gear portion 72 as shown in FIG. ing. For this reason, the weight holder 7 can be reduced in size and the pitch circle diameter of the sun gear 71 can be reduced. Moreover, since the diameter of the revolution circle of the planetary gear 5 can be reduced as described above, the pitch circle diameter of the sun gear 71 can be reduced. Further, the thickness of the weight 7a may be equal to the axial length (height) of the holding leg 73, or the thickness of the weight 7a may be increased. The weight 7a is disposed between the pair of holding legs 73, and the posture and the like are not limited by the holding legs 73. For this reason, the weight 7 a is movable in the axial direction of the sun gear 71 with respect to the holding leg 73. For this reason, when the weight 7a revolves, the axial surface of the weight 7a comes into contact with the guide member as will be described later. At this time, if the holding leg portion 73 comes into contact with the guide member, there is a possibility that the weight 7a may become resistance to revolution, so that the weight 7a is brought into contact with the guide member (details will be described later). .

The rotational center of the sun gear 71 coincides with the rotational center O of the carrier 4. The planetary gear 5 meshes with the sun gear 71. That is, the planetary gear 5 meshes with the fixed internal gear 23 and meshes with the sun gear 71.
The weight 7 a revolves around the rotation center O by the rotation of the sun gear 71, and the weight 7 a slides with respect to the holding leg 73 due to the radial force acting in the revolution. You can do that. Further, the end portion of the holding leg portion 73 on the sun gear portion 72 side is made to coincide with the annular inner peripheral surface of the sun gear portion 72. As shown in FIGS. 16 to 18, the lower surface of the holding leg 73 has a stepped portion 73 a with a reduced thickness from the tip to an appropriate position. For this reason, when the weight 7a is held by the holding leg 73, the lower surface of the weight 7a protrudes downward from the lower surface of the holding leg 73, and as described above, the weight 7a is reliably guided. The member can be contacted.

(Cap 8)
19 and 20 show the cap 8. FIG. 19 is a perspective view showing the cap 8 as seen from above, and FIG. 20 is a perspective view showing the cap 8 as seen from below. The cap 8 has a disk-shaped lid body 81, a support pillar portion 82 projecting from the center of the upper surface of the lid body portion 81, and a circumferentially projecting portion of the lid body portion 81 so as to project upward at equal intervals. A locking leg 83 is provided. In addition, the outer diameter of the lid part 81 is set to a size that can be loosely inserted into the inner diameter of the weight holder accommodating part 26. Moreover, although the cover part 81 can also be formed in a rectangle, it is preferable to provide the part which can be loosely inserted in the weight holder accommodating part 26. FIG.

  The pair of rails 81a and 81b are formed so as to protrude from the upper surface side of the lid 81, but these pair of rails 81a and 81b are centered on the rotation center O but have different radii. Is provided. Therefore, there is an appropriate interval between the rail 81a and the rail 81b. The flange portion 43 of the carrier 4 and the weight holder 7 are loosely fitted on the outer peripheral side of the support column portion 82, and the carrier 4 and the weight holder 7 are rotatable about the support column portion 82. For this reason, the center of the support column 82 coincides with the rotation center O. In a state where the weight holder 7 is loosely fitted on the outer peripheral side of the support column portion 82, the rails 81a and 81b are configured such that the stepped portion 73a formed on the holding leg portion 73 of the weight holder 7 is positioned. Yes. As will be described later, any one of these rails 81a and 81b may be used.

  The support column portion 82 is formed in a cylindrical shape, and its bottom portion is closed by a lid portion 81. In addition, cam grooves 84a and 84b are formed on the inner side of the cylinder of the support column portion 82 by erecting a thick frame-like portion 82a. When the cap 8 is connected to the base 2, the positions of the cam groove 84a and the cam hole 24a are defined so that the cam groove 84a faces the cam hole 24a of the base 2 and the cam groove 84b faces the cam hole 24b. The upper part of the drive shaft 32b is inserted through the cam hole 24a, and the lower part is inserted into the cam groove 84a. Further, the upper portion of the idle shaft 33b is inserted through the cam hole 24b, and the lower portion is inserted into the cam groove 84b. The cam grooves 84a and 84b can guide the inserted drive shaft 32b and the idle shaft 33b reliably, and have a depth that is not easily damaged by the movement of the drive shaft 32b and the idle shaft 33b. Is formed by a sufficiently thick frame-like portion 82a. Note that the bottom portion of the support column portion 82 may be released without being closed by the lid portion 81. However, when the bottom portion of the support column portion 82 is closed, the lower portions of the drive shaft 32b and the idle shaft 33b are not exposed. Therefore, dust and the like are prevented from entering the drive shaft 32b and the idle shaft 33b.

  The cross-sectional shape of the locking leg 83 is provided in a shape corresponding to the locking hole 25 a of the base 2, and the tip of the locking leg 83 facing the support column 82 (upper portion). ) Is provided with a locking claw 83a protruding toward the support column portion 82 side. In addition, a through hole 83b is formed in the base end portion of the locking leg 83, whereby the locking leg 83 is flexible. In this embodiment, the configuration in which the four locking legs 83 are provided is illustrated, but the number of the locking legs 83 may be at least two diagonally.

(Code Guide 9)
FIG. 21 and FIG. 22 show the code guide 9, FIG. 21 is a perspective view showing the working side Po, that is, the state where the code guide 9 is viewed from the front, and FIG. 22 is the operation side Qi, ie, the code guide 9 It is a perspective view which shows the state which looked at from back. The right side wall 93 and the left side wall 94 constituting the cord guide 9 are formed in a substantially trapezoidal shape, and a roof plate 95 is stretched over the upper edge thereof. In addition, the shape of the right side wall 93 and the left side wall 94 is not limited to a trapezoidal shape, and may be other shapes, and the roof plate 95 may be a flat plate. Further, a locking claw portion 93 a is provided on the inner side surface of the right side wall 93, and a locking claw portion 94 a is provided on the inner side surface of the left side wall 94. These locking claws 93 a and 94 a engage with locking holes 21 h and 21 i provided in the base 2, respectively, and connect the code guide 9 to the base 2. Shoulders 95a are provided in a state of projecting left and right from the left and right ends of the roof plate 95. That is, the shoulder 95a protrudes further to the side than the side walls 93 and 94.

  The working side guide port 91 is formed surrounded by the upper plate 91a, the lower plate 91b, and the side wall 93, while the operation side guide port 92 is formed surrounded by the upper plate 92a, the lower plate 92b, and the side wall 94. Has been. The upper plates 91a and 92a are both hung on the intermediate portions in the height direction of the side walls 93 and 94, and the lower plates 91b and 92b are both hung on the lower portions of the side walls 93 and 94. In addition, at the lower end portions of the side walls 93 and 94 and between the lower plates 91b and 92b, cutout portions 93b and 94b cut out in a rectangular shape are provided. In addition, a pair of engagement legs 91c are provided on the lower surface of the lower plate 91b, and a pair of engagement legs 92c are provided on the lower surface of the lower plate 92b. Between the distance (inter-face distance) between the pair of engaging legs 91c that are not opposed to each other (outside face) and the side between the pair of engaging legs 92c that are not opposed to each other (outside) The distance (inter-surface distance) is provided approximately equal to the distance (inter-surface distance) between the surfaces on the side (inner side) where the engagement weir portions 25d described above face each other.

  Guide plates 91d and 92d as lateral partition members are provided across the side walls 93 and 94 at intermediate portions in the height direction of the working side guide port 91 and the operation side guide port 92, respectively. The working side guide port 91 is provided with a pair of guide pins 96a and 96b as vertical partition members so as to straddle between the upper plate 91a and the lower plate 91b. Further, a guide pin 97 as a vertical partition member is provided in the operation side guide port 92 so as to straddle both in the central part of the upper plate 91a and the lower plate 91b. The longitudinal direction of the guide pins 96a, 96b, 97 is parallel to the direction of the drive shaft 32b of the drive roller 32.

(Assembly of cord braking device 1)
The assembly of the cord braking device 1 configured as described above will be described below.

First, the slider 3 is assembled. As shown in FIGS. 1, 5, and 6, a washer 32 c is loosely fitted to a drive shaft 32 b to which the roller portion 32 a is attached in close contact with the end portion of the roller portion 32 a, and a washer is disposed below the drive shaft 32 b. The drive roller 35 is assembled by attaching the drive gear 35 so as to face the surface 32c. As a result, the roller portion 32a, the drive shaft 32b, and the drive gear 35 rotate together. On the other hand, the idler shaft 33b is inserted into the roller portion 33a to assemble the idler roller 33. In addition, even if the roller part 33a and the idle shaft 33b rotate integrally, the roller part 33a may be a structure rotated about the idle shaft 33b.
Further, the drive shaft 32b of the drive roller 32 is inserted into the holding through hole 31f1 and the holding through hole 31g1 of the slider bracket 31 from the side. At this time, as shown in FIG. 5, the washer 32c is located between the inner side surfaces of the ceiling wall 31f and the bottom wall 31g and the end surface of the roller portion 32a, and the drive gear 35 is located below the bottom wall 31g. To position. Further, the drive shaft 32b of the idle roller 33 is inserted from the side into a holding through hole 31f2 formed in the ceiling wall 31f and a holding through hole 31g2 formed in the bottom wall 31g. Further, the compression coil spring 34 is accommodated in the spring accommodating portion 31e.

  Next, the assembled slider 3 is assembled into the base 2. The slider 3 is inserted into the slider accommodating portion 21 with the outer surface of the ceiling wall 31 f of the slider 3 facing the inner surface of the ceiling wall 21 e of the base 2. At this time, the positioning protrusion 31 h formed on the slider bracket 31 is inserted from the lower end portion of the guide groove 21 m formed on the inner surface of the slider accommodating portion 21, and the compression coil spring 34 is compressed. In this state, the positioning projection 31h is moved in the direction of the ceiling wall 21e while sliding in the guide groove 21m. At this time, the compression coil spring 34 comes into contact with the rear wall 21 c of the slider accommodating portion 21, and a restoring force acts in a direction separating the inner surface of the rear wall 21 c and the slider 3. Then, the slider 3 is moved relative to the slider accommodating portion 21 so that the drive shaft 32b and the idle shaft 33b protruding from the ceiling wall 31f are inserted into the cam hole 24a and the cam hole 24b, respectively. When the positioning protrusion 31h slides in the guide groove 21m and reaches the notch window portions 21j and 21k, the fitting between the positioning protrusion 31h and the guide groove 21m is released, so that the slider 3 is a compression coil spring. Under the restoring force of 34, it moves to the front wall 21a side. At this time, the positioning protrusion 31h moves while sliding on the edge portions of the cutout window portions 21j and 21k, and thereafter, the slider 3 is not dropped from the slider housing portion 21 by the edge portions of the cutout window portions 21j and 21k. . In addition, the slider 3 is pressed in a direction to move toward the front wall 21a in response to the restoring force of the compression coil spring 34. For this reason, the slider 3 cannot be removed from the slider accommodating portion 21 unless the slider 3 is moved against the restoring force of the compression coil spring 34. Further, the drive shaft 32b is inserted into the cam hole 24a and the idle shaft 33b is inserted into the cam hole 24b, so that the drive roller 32 and the idle roller 33 are connected by the cam hole 24a and the cam hole 24b. It will be regulated.

  After the slider 3 is accommodated in the slider accommodating portion 21, the annular support portion 42 of the carrier 4 is accommodated in the carrier accommodating portion 22. At this time, the internal gear 41 is engaged with the drive gear 35. Further, the support shaft 51 is inserted into the support hole 44 of the flange surface 43a to support the planetary gear 5 rotatably. In this state, the planetary gear 5 meshes with a fixed internal gear 23 formed on the base 2. Then, the slider washer 6 is disposed so as to cover the planetary gear 5. The outer diameter of the slider washer 6 is larger than the outer diameter of the carrier 4, and the inner diameter is set such that the tooth tip of the planetary gear 5 is exposed inside the inner circumference.

  Next, the weight holder 7 is disposed inside the slider washer 6. In this state, the planetary gear 5 and the sun gear 71 of the weight holder 7 are engaged with each other. Then, the weight 7 a is held by the holding leg portion 73 of the weight holder 7, and the bottom portion of the base 2 is closed with the cap 8.

  When closing the bottom of the base 2 with the cap 8, the locking leg portion 83 of the cap 8 is inserted into the locking hole 25 a formed in the cap holding portion 25. At this time, due to the elasticity of the locking leg 83 and the flexibility of the locking leg 83 in the vicinity of the through hole 83b, the locking leg 83 bends outward and the outer peripheral surface of the weight holder housing 26 is locked to the locking claw. The locking leg 83 is inserted into the locking hole 25a while 83a slides. When the locking claw 83a passes through the locking hole 25a, the locking leg 83 returns to its original shape from the bent state, so that the locking claw 83a engages with the upper edge of the locking hole 25a. At this time, the cap 8 is inserted into the weight holder accommodating portion 26. The portion of the locking leg 83 where the through hole 83b is formed is located in a notch 26a formed at the lower end of the weight holder accommodating portion 26, and the lower end of the weight holder accommodating portion 26 and the lid portion 81. The bottom surface is almost the same height. In this state, the cap 8 does not fall off from the base 2, and the slider 3 and the carrier 4, the planetary gear 5, the slider washer 6, the weight holder 7, and the weight 7 a housed in the base 2 are positioned at predetermined positions on the base 2. . Further, the carrier 4 and the weight holder 7 are loosely fitted to the support column portion 82 of the cap 8, and the carrier 4 and the weight holder 7 can rotate about the support column portion 82. Therefore, the support column portion 82 has a height at which the carrier 4 and the weight holder 7 can be loosely fitted.

  Further, when the base 2 is closed with the cap 8, the drive shaft 32b and the idle shaft 33b projecting downward from the bottom wall 31g of the slider 3 are connected to the cam groove 84a and the cam groove 84b formed in the cap 8, respectively. The direction of the cap 8 is determined so as to be inserted. As a result, the drive shaft 32b is supported by the cam hole 24a of the base 2 and the cam groove 84a of the cap 8, and the idle shaft 33b is supported by the cam hole 24b and the cam groove 84b.

  As described above, the cord braking device 1 is assembled as shown in FIGS. 23 and 24 with the bottom of the base 2 closed by the cap 8. The cord guide 9 is assembled to the cord braking device 1.

(Assembly of code guide 9)
The code guide 9 is covered from above the base 2 in a state in which the working side guide port 91 faces the working side opening 21 b of the base 2. When the code guide 9 is pushed into the base 2 in this posture, the locking claws 93a and 94a of the code guide 9 are engaged with the locking holes 21h and 21i of the base 2, respectively. 2 is prevented from leaving. Further, the engagement leg portions 91c and 91c of the cord guide 9 face the inner side surfaces of the engagement weir portions 25d and 25d of the leg holding portion 25b, and the engagement weirs of the engagement leg portions 91c and 91c and the leg holding portion 25b are opposed to each other. The portions 25d and 25d come into contact with each other. Further, the engagement legs 92c and 92c are opposed to the inner surfaces of the engagement weirs 25d and 25d of the leg holding part 25c, and the engagement legs 92c and 92c and the engagement weirs 25d and 25d of the leg holding part 25c are arranged. Abut. Further, the end surfaces of the guide pins 96a and 96b existing in the working side guide port 91 of the code guide 9 face the locking projections 25e and 25f. The end surface of the guide pin 97 present in the operation side guide port 92 of the code guide 9 faces the locking projection 25g provided on the leg holding portion 25c. In addition, since the engaging leg portions 91c and 91c of the cord guide 9 are positioned on the leg holding portion 25b and the leg holding portion 25c of the cap holding portion 25, unexpected external force applied to the cord guide 9 is accommodated in the base 2. The influence of the external force on the applied braking member can be suppressed, and a smooth braking operation can be maintained.

  The state where the code guide 9 is assembled is shown in FIGS. As shown in FIGS. 2 and 3, the lifting / lowering cord CD is passed with the cord guide 9 assembled. The lifting / lowering cord CD is passed through the working side opening 21b of the base 2 from the working side guide port 91 of the code guide 9, and further between the drive roller 32 and the idle roller 33, and further, the operation side opening of the base 2 is opened. 21d and the operation side guide port 92 of the code guide 9 are passed. Thus, the lifting / lowering cord CD passed through the cord braking device 1 and the cord guide 9 can be moved in the directions indicated by the arrow P and the arrow Q in FIGS. As described above, the direction indicated by the arrow P is the movement of the lifting / lowering cord CD toward the working side Po, and the movement in this direction is defined as forward movement. The direction indicated by the arrow Q is the movement of the lifting / lowering cord CD toward the operation side Qi, and the movement in this direction is set as the backward movement.

(Power transmission to weight 7a for braking)
23, 24, and 25 show the cord braking device 1, FIG. 23 is a perspective view showing the cord braking device 1 as viewed from the working side Po, and FIG. 24 shows the cord braking device 1 on the operating side Qi. FIG. 25 is a plan view of the cord braking device 1.
As described above, the restoring force is applied to the slider 3 accommodated in the slider accommodating portion 21 so as to move to the working side Po by the compression coil spring 34. Therefore, the drive shaft 32b is pressed against the cam surface 24e by the inner surface of the cam hole 24a and the sliding surface of the reinforcing rib cam 24c, and the idle shaft 33b is a cam surface by the inner surface of the cam hole 24b and the sliding surface of the reinforcing rib cam 24d. 24f is pressed. Therefore, the drive shaft 32b and the idle shaft 33b move while being guided by the cam surfaces 24e and 24f. The slider 3 moves relative to the base 2 as the drive shaft 32b and the idle shaft 33b move.
Further, the lifting / lowering cord CD passed through the cord braking device 1 is sandwiched between the drive roller 32 and the idle roller 33. When the lifting / lowering cord CD moves to the working side Po (that is, moves forward), the drive roller 32 and the idle roller 33 rotate. In addition, the drive roller 32 and the idle roller 33 are moved forward with the advancement of the lifting / lowering cord CD, and are positioned at a restriction position that restricts the movement of the lifting / lowering cord CD. Since the drive shaft 32b and the idle shaft 33b are guided to the cam hole 24a and the cam hole 24b, respectively, the drive roller 32 and the idle roller 33 approach each other. For this reason, in this regulation position, the force which clamps the raising / lowering code | cord | chord CD by these drive rollers 32 and the idle roller 33 increases. Moreover, at least the drive roller 32 of the drive roller 32 and the idle roller 33 rotates with the movement of the lift code CD because the frictional force between the lift code CD and the drive roller 32 is large. This rotation also rotates the drive shaft 32b. That is, the drive shaft 32b continues to rotate in a state where the drive shaft 32b is in the restricted position. Then, as the lifting / lowering cord CD advances, the drive roller 32 rotates counterclockwise in FIG. 25 as indicated by an arrow U in the plan view of FIG. On the other hand, the idle roller 33 rotates in the clockwise direction in FIG. 25 as indicated by an arrow C in FIG. Note that slip may occur between the outer peripheral surface of the idle roller 33 and the lifting / lowering cord CD. That is, it is only necessary that the idle roller 33 can maintain the state where the lifting / lowering cord CD is sandwiched in cooperation with the drive roller 32. Further, the idle roller 33 does not necessarily need to rotate, and therefore the idle shaft 33b does not need to rotate.

When the drive roller 32 rotates in the arrow U direction, the drive gear 35 inserted in the drive shaft 32b of the drive roller 32 also rotates in the same direction. The drive gear 35 meshes with the internal gear 41 of the carrier 4 as shown in FIGS. Therefore, the rotation of the drive gear 35 causes the internal gear 41 to rotate counterclockwise in FIGS. 26 and 27 about the rotation center O of the internal gear 41. 27 is a perspective view of a cross section taken along line 1-1 in FIG.
By the way, the rotation center of the drive gear 35 is the axis of the drive shaft 32b, and the axis does not coincide with the rotation center O. In addition, as the elevating cord CD advances, the drive roller 32 receives the frictional force between the elevating cord CD and the restoring force of the compression coil spring 34 and moves. For this reason, the positional relationship between the rotation center of the drive gear 35 and the rotation center O changes. On the other hand, the cam hole 24a has a shape that can maintain the meshing relationship between the drive gear 35 and the internal gear 41 even when the positional relationship changes. In addition, even when the drive roller 32 moves to the working side Po, it is necessary to cooperate with the idle roller 33 so that the sandwiched state of the lifting / lowering cord CD can be maintained. For this reason, the cam hole 24a and the cam hole 24b are formed so as to be closer to each other on the action side Po than the operation side Qi, and are provided in a substantially V-shaped state. Due to the shape of the cam hole 24b into which the idle shaft 33b is inserted, the idle roller 33 moves in cooperation with the drive roller 32 so as to maintain the sandwiched state of the lifting / lowering cord CD. For this reason, if the advancement of the lifting / lowering cord CD continues, the drive shaft 32b and the idler shaft 33b are connected to the cam hole 24a by the frictional force between the lifting / lowering cord CD, the drive roller 32 and the idle roller 33 and the restoring force of the compression coil spring 34. , 24b and moved to the working side Po together with the slider 3.

  When the internal gear 41 is rotated in the direction equal to the arrow U direction by the rotation of the drive gear 35, that is, in the counterclockwise direction in FIGS. 26 and 27 around the rotation center O, the planetary gear 5 supported by the carrier 4 is rotated. Revolving in the counterclockwise direction in FIGS. 26 and 27 about the center O. As shown in FIG. 28, the planetary gear 5 meshes with a fixed internal gear 23 formed on the inner surface of the base 2. Therefore, the planetary gear 5 revolves and rotates around the support shaft 51 by the meshing relationship with the fixed internal gear 23. 28 is a perspective view of a cross section taken along line 2-2 in FIG.

  The planetary gear 5 meshes with the fixed internal gear 23 and also meshes with a sun gear 71 formed on the outer peripheral surface of the weight holder 7 as shown in FIGS. Due to the rotation of the planetary gear 5, the sun gear 71 rotates around the rotation center O in the direction opposite to the direction of rotation of the planetary gear 5, that is, in the counterclockwise direction in FIGS.

  By the way, the support shaft 51 of the planetary gear 5 is supported by the support hole 44 of the flange portion 43 below the internal gear 41, and a part of the support hole 44 overlaps the annular support portion 42. Therefore, as shown in FIG. 30, a part of the planetary gear 5 overlaps a part of the internal gear 41 in a direction (vertical direction) parallel to the rotation center O. 30 is a perspective view of a cross section taken along line 3-3 in FIG.

  On the other hand, unlike the above, the planetary gear 5 is supported on the outer side of the outer peripheral surface of the annular support portion 42 so that a part of the planetary gear 5 does not overlap with a part of the internal gear 41 in the vertical direction. In this case, the drive gear 35, the internal gear 41, the planetary gear 5, and the fixed internal gear 23 are arranged at positions that do not overlap when projected onto a plane. On the other hand, when the planetary gear 5 is arranged so that a part of the planetary gear 5 overlaps a part of the internal gear 41 in a direction (vertical direction) parallel to the rotation center O as shown in FIG. When projected onto a plane, a part of the arrangement is superimposed. For this reason, the arrangement space of the drive gear 35, the internal gear 41, and the planetary gear 5 can be reduced, and the diameter of the fixed internal gear 23 that meshes with the planetary gear 5 is also reduced. The size can be reduced. For this reason, the width of the head box that holds the cord braking device 1 can be reduced.

  A slider washer 6 is interposed between the planetary gear 5 and the weight 7a of the weight holder 7 as shown in FIG. The sun gear 71 passes through the inner peripheral side of the slider washer 6, protrudes above the slider washer 6, and meshes with the planetary gear 5. Moreover, since the outer diameter of the slider washer 6 is larger than the outer diameter of the carrier 4, the interference between the planetary gear 5 and the weight 7a is prevented. Further, since the support shaft 51 of the planetary gear 5 is inserted into the support hole 44 and is rotatable, the support shaft 51 may fall off the support hole 44. However, even if the support shaft 51 is about to fall off, the slider washer 6 prevents it. The planetary gear 5 is allowed to revolve and rotate in contact with the slider washer 6.

  Since the sun gear 71 is formed on the outer peripheral surface of the weight holder 7, the weight holder 7 rotates around the rotation center O as the sun gear 71 rotates. The weight 7a held by the holding leg 73 of the weight holder 7 revolves around the rotation center O, and tends to be detached from the holding leg 73 in the outer circumferential direction by receiving a centrifugal force. At this time, the holding leg portions 73 are arranged at equal intervals in the circumferential direction, and the holding leg portion 73 is in a state where the outer peripheral side is expanded. For this reason, the weight 7a can be easily detached in the outer circumferential direction by centrifugal force. Since the weight holder 7 is disposed in the cylindrical weight holder accommodating portion 26, the weight 7a on which the centrifugal force acts is in contact with the inner peripheral surface of the weight holder accommodating portion 26, and the weight 7a is a weight. The inner peripheral surface of the holder accommodating portion 26 is slid. This becomes the rotational resistance of the weight holder 7, and a braking force acts on the rotation of the weight holder 7. In order to ensure that braking by the weight 7a acts, it is preferable that the centrifugal force generated in the weight 7a is large, and for that purpose, it is preferable that the rotation speed of the weight holder 7 is large. For this reason, it is preferable to increase the speed as much as possible when rotation is transmitted from the drive gear 35 to the weight holder 7. Furthermore, the weight 7a is preferably as large as possible.

  That is, the driving gear 35 is rotated by the advancement of the lifting / lowering cord CD, and the driving force is transmitted in this order from the driving gear 35 to the internal gear 41, the planetary gear 5, the fixed internal gear 23, and the sun gear 71, and the weight 7a as a braking member. A braking force is generated by applying a centrifugal force. By this braking force, the rotation of the weight holder 7 is decelerated, the revolution of the planetary gear 5 meshing with the sun gear 71 is decelerated, and the rotation of the carrier 4 is decelerated. The deceleration of the carrier 4 becomes the rotational resistance of the drive gear 35. Therefore, the drive roller 32 to which the drive gear 35 is attached is decelerated. Since the drive roller 32 holds the lifting / lowering cord CD in cooperation with the idle roller 33, the deceleration of the rotation of the drive roller 32 acts in a direction to prevent the lifting / lowering cord CD from moving, Acts as a braking force to restrict movement. Moreover, while the movement of the lifting / lowering cord CD continues, the drive roller 32 and the idle roller 33 continue to rotate, so that the centrifugal force continues to act on the weight 7a and the braking force also continues. appear. Therefore, the braking force is applied continuously to the movement of the lifting / lowering cord CD.

  By the way, in order to generate the braking force smoothly, it is necessary that the weight 7a is in contact with the inner peripheral surface of the weight holder accommodating portion 26, and the weight 7a receives the centrifugal force and smoothly moves in the outer peripheral direction. It is preferable to do. For this reason, the smooth movement of the weight 7a is not prevented. For example, the lid portion 81 of the cap 8 is a portion where the weight 7a is opposed to the cap 8. When the weight 7a turns, it comes into resistance when the lid 7 comes into contact with the lid 7 and the smooth movement of the weight 7a is prevented. In some cases, the weight 7a does not move in the outer circumferential direction, and the braking force may not be generated. For this reason, the weight 7a can be smoothly moved in the outer peripheral direction by being guided by the rails 81a and 81b formed on the upper surface of the lid 81 and turning the weight 7a. In this case, it is preferable to reduce the contact area between the rails 81a and 81b and the weight 7a as much as possible so that the friction between the rails 81a and 81b and the weight 7a does not occur. As a result, the weight 7a can turn smoothly and can move smoothly in the outer circumferential direction. Note that either one of the rails 81a and 81b may be provided, but when the weight 7a moves in the outer peripheral direction, the weight 7a is prevented from being detached from the rail. Further, depending on the behavior of the weight 7a when turning, the posture of the weight 7a may change and come off from one rail. For this reason, it is preferable to provide two rails 81a and 81b. The rails 81a and 81b are positioned to face the stepped portion 73a of the holding leg 73. That is, since the stepped portion 73a is formed, the holding leg portion 73 is configured not to contact the rails 81a and 81b.

  Further, as described above, since the slider washer 6 is interposed between the weight 7a and the planetary gear 5, the weight 7a does not contact the planetary gear 5, and the weight 7a moves in the outer circumferential direction. The smoothing of is not impaired.

(Operation of blind and cord braking device 1)
Next, an embodiment of a horizontal blind as a shielding device in which the above-described cord braking device 1 is incorporated will be described below, and the operation of the cord braking device 1 will also be described.

  31 and 32 show a blind 100 in which the cord braking device 1 according to the embodiment of the present invention is incorporated. FIG. 31 is a perspective view of the blind, and FIG. 32 is a cross-sectional view of the head box showing the inside of the head box cut along a horizontal plane. The blind 100 is a blind 100 called a one-pole type. FIG. 32A shows a structure corresponding to a blind head box with a small product width, and FIG. 32B shows a structure corresponding to a blind head box with a large product width.

  In this blind 100, a plurality of slats 103 are arranged between a bottom rail 101 as a shielding material arranged on the lower side and a head box 102 arranged on the upper side. The mounting bracket 104 is fixed to a ceiling wall or a side wall. The bottom rail 101 is suspended by an elevating cord CD so as to be movable up and down. In this blind 100, the bottom rail 101 is suspended by two lifting cords CD arranged at an appropriate interval. In addition, each slat 103 is set to a predetermined height so as to be linked to a ladder cord RC spanned between the bottom rail 101 and the head box 102.

  The lifting / lowering cord CD is drawn into the head box 102, guided by guide means (not shown), and stretched along the longitudinal direction in the head box 102. A lock device 105 and a cord braking device 1 are arranged in the head box 102, and the two lifting cords CD are passed through the lock device 105 and the cord braking device 1. And the cord braking device 1 is arrange | positioned in the direction from which the side which faces the two raising / lowering cords CD becomes the action side Po on the outer side from the two raising / lowering cords CD. A tilt shaft 107 is rotatably supported in the head box 102 in the longitudinal direction. As shown in FIGS. 31 and 32, the tilt shaft 107 is interlocked with a hollow tilt pole 108 disposed at the end of the head box 102 via a tilt gear 108a and a tilt joint 108b. That is, when the tilt pole 108 is rotated, the tilt shaft 107 is rotated via the tilt joint 108b and the tilt gear 108a. Further, the lifting / lowering cord CD passed through the locking device 105 and the cord braking device 1 is inserted from the end of the head box 102 into the hollow tilt pole 108. The tilt shaft 107 is supported by a support portion 107a.

  As shown in FIG. 31, a grip 108c is provided integrally with the tilt pole 108 below the tilt pole 108, and the tilt pole 108 can be rotated by gripping the grip 108c. The lifting / lowering cord CD inserted through the tilt pole 108 is connected to an equalizer 108d existing at the lower end of the tilt pole 108. By pulling the equalizer 108d, the lifting / lowering cord CD is pulled, thereby raising the bottom rail 101.

  The ladder cord RC is passed between the bottom rail 101 and the head box 102 through both ends of the slat 103 in the width direction. Further, the ladder code RC is interlocked with a tilt shaft 107 disposed in the longitudinal direction in the head box 102. When the tilt shaft 107 is rotated by the rotation of the tilt pole 108, the vertical movement differs between the pair of ladder cords RC, and thereby the tilt angle of the slat 103 is changed.

  This blind 100 is provided inside a window or the like. When the bottom rail 101 is raised, the slats 103 are also folded up so that the light can be taken from a window or the like. When the bottom rail 101 is lowered from the raised position, the slat 103 can be disposed to face the window or the like. Further, by changing the inclination angle of the slat 103, it is possible to adjust the amount of light even in the lowered state.

  In order to raise and fold the blind 100 in the lowered state of the blind 100, the user holds the equalizer 108d and then lowers it. Thereby, since the bottom rail 101 is pulled up via the raising / lowering cord CD, the slat 103 is also lifted and a window etc. are open | released. At this time, the lifting / lowering cord CD moves from the operating side Po of the cord braking device 1 to the operating side Qi. The drive roller 32 is guided to the cam surface 24e and the cam groove 84a of the cam hole 24a and the idle roller 33 is guided to the cam surface 24f and the cam groove 84b of the cam hole 24b by the movement of the lift code CD. Thereby, the drive roller 32 and the idle roller 33 move to the operation side Qi together with the slider 3 against the restoring force of the compression coil spring 34. Since the drive roller 32 and the idle roller 33 are separated by the movement to the operation side Qi, when the equalizer 108d is pulled down, the drive roller 32 and the idle roller 33 do not apply a braking force to the lift code CD, and the lift code CD can be pulled smoothly. Therefore, the bottom rail 101 rises smoothly. Further, for example, when the bottom rail 101 is stopped halfway according to the solar radiation angle and it is desired to keep the lower part open, the force that pulls the equalizer 108d when the bottom rail 101 reaches a desired position is loosened. Then, the lock device 105 is activated to prevent the lifting / lowering cord CD from moving. As a result, the bottom rail 101 stops at the position and the lower part is opened. When it is desired to open again from this state, if the equalizer 108d is slightly pulled down, the lock device 105 can be released and the bottom rail 101 can be pulled up.

  When the blind 100 is folded up, the bottom rail 101 rises and approaches the head box 102. In order to lower the bottom rail 101, the equalizer 108d is slightly lowered in this state to release the operation of the lock device 105. When the hand is released from the equalizer 108d, the lifting / lowering cord CD becomes free, so that the bottom rail 101 falls due to its own weight. As the bottom rail 101 falls, the lifting / lowering cord CD moves from the operation side Qi to the action side Po.

  The slider 3 is urged to move to the working side Po by receiving the restoring force of the compression coil spring 34, and the drive roller 32 and the idle roller 33 sandwich the lifting code CD. At this time, the force for sandwiching the lifting / lowering cord CD is small, and the movement of the lifting / lowering cord CD is not restricted. The position of the drive roller 32 and the idle roller 33 that sandwich the lifting / lowering cord CD with this small force becomes the release position. In this state, when the lifting / lowering cord CD moves from the operation side Qi to the action side Po, the drive roller 32 and the idle roller 33 move further to the action side Po together with the slider 3 and are positioned at the capture position. The drive roller 32 and the idle rotor 33 are moved to the working side Po while being guided by the cam hole 24a and the cam groove 84a. The idle roller 33 moves in the direction of the working side Po while maintaining the clamping state of the lifting / lowering cord CD while being guided by the cam hole 24b and the cam groove 84b.

  Due to the movement of the lifting / lowering cord CD from the operating side Qi to the working side Po, as described above, the drive roller 32 rotates in the counterclockwise direction (direction indicated by the arrow U) in FIG. Moreover, since the drive roller 32 has moved to the capture position, the lifting / lowering cord CD is held between the drive roller 32 and the idle roller 33 with a large force. Therefore, the drive roller 32 rotates reliably. Then, as described above, the rotation of the drive roller 32 is transmitted from the drive gear 35 to the sun gear 71 to rotate the sun gear 71. Thereby, a centrifugal force is applied to the weight 7a and a braking operation is performed to generate a braking force. Upon receiving this braking force, the rotation of the drive roller 32 is braked, and the movement of the lifting / lowering cord CD is restricted. For this reason, the falling speed of the bottom rail 101 suspended from the lifting / lowering cord CD is reduced, and the bottom rail 101 is lowered at a low speed. Moreover, when the bottom rail 101 continues to descend, the braking action continues.

  When the equalizer 108d is gripped and the movement of the lifting / lowering cord CD is stopped while the bottom rail 101 is being lowered, the locking device 105 is activated. Thereby, the raising / lowering code | cord | chord CD is hold | maintained, it will be in the state by which the bottom rail 101 was maintained in the said position, and can be made into the state which opened the lower part of the blind 100. FIG. At this time, since the lowering speed of the bottom rail 101 is small, it can be easily stopped at a desired position, and can be easily stopped at a desired opening degree.

  With reference to FIGS. 33 and 34, an embodiment in which the cord braking device 1 is incorporated in a blind 110 called a pole type will be described. FIG. 33 is a perspective view of the blind 110, and FIG. 34 is a cross-sectional view of the head box showing the inside of the head box cut along a horizontal plane. FIG. 34A shows a structure corresponding to a blind head box 102 with a small product width, and FIG. 34B shows a structure corresponding to a blind head box 102 with a large product width. In addition, the same code | symbol is attached | subjected to the site | part same as the structure which concerns on the Example shown in FIG. 31 and FIG.

  The lifting / lowering cord CD passed through the locking device 105 and the cord braking device 1 hangs down from a cord outlet 102 a provided at an appropriate part of the head box 102. The two lifted cords CD that are suspended are introduced from one of the code equalizers 111, and the operation cord HC is suspended from the other of the code equalizers 111. The tip of the operation cord HC is connected to the end of the bottom rail 101.

  Since the tilt shaft 107 is interlocked with the tilt pole 112 via the tilt gear 112a and the tilt joint 112b, the tilt shaft 107 rotates when the tilt pole 112 is gripped and rotated. The ladder code RC is operated by the rotation of the tilt shaft 107, and the tilt angle of the slat 103 is changed. Further, when the operating cord HC or the code equalizer 111 is held and the lifting code CD is pulled, the bottom rail 101 is raised.

  In the blind 110 as well, as in the case of the blind 100, when the bottom rail 101 falls due to its own weight for light shielding, the fall speed is reduced by the operation of the cord braking device 1, and the lower rail 101 is lowered at a low speed.

  In the blind 120 shown in FIG. 35 and FIG. 36, a pair of elevating cords CD is arranged with the width of the slat 103 sandwiched between the central portions of the head box 102. A pair of ladder cords RC is disposed along the pair of lift cords CD. Further, a lifting / lowering cord CD and a ladder cord RC are disposed at both ends of the head box 102. Furthermore, a ladder cord RC is disposed at an intermediate position between the center portion and both end portions of the head box 102. The blind 120 is called a one-pole type, and the tilt shaft 107 is interlocked with the hollow tilt pole 121 through a tilt gear 121a and a tilt joint 121b. Further, when the grip 121c provided at the lower part of the tilt pole 121 is gripped and rotated, the tilt shaft 107 rotates and the ladder code RC is operated. Further, the lifting / lowering cord CD passes through the inside of the tilt pole 121 and is interlocked with an equalizer 121d disposed at the lower end of the tilt pole 121. When the equalizer 121d is pulled, the lifting / lowering cord CD is pulled and the bottom rail 101 is moved. To rise.

  In the blind 120 as well, as in the case of the blind 100, when the bottom rail 101 falls due to its own weight for light shielding, the fall speed is reduced by the operation of the cord braking device 1 and the lower rail 101 is lowered at a low speed.

  In the blind 130 shown in FIGS. 37 and 38, a pair of elevating cords CD is arranged at the center of the head box 102 with the width of the slat 103 being sandwiched between the blinds 120 described above. A pair of ladder cords RC is disposed along the pair of lift cords CD. Further, a lifting / lowering cord CD and a ladder cord RC are disposed at both ends of the head box 102. Furthermore, a ladder cord RC is disposed at an intermediate position between the center portion and both end portions of the head box 102. This blind 120 is called a pole type, and the four lifting / lowering cords CD passed through the lock device 105 and the cord braking device 1 are suspended from a cord outlet 102a provided at an appropriate part of the head box 102. Yes. The suspended raising / lowering cord CD is introduced from one side of the cord equalizer 131, and the operation cord HC is suspended from the other side of the cord equalizer 131. The tip of the operation cord HC is connected to the end of the bottom rail 101.

  The tilt shaft 107 is interlocked with the tilt pole 132 through a tilt gear 132a and a tilt joint 132b. When the tilt pole 112 is gripped and rotated, the tilt shaft 107 rotates. The ladder code RC is operated by the rotation of the tilt shaft 107, and the tilt angle of the slat 103 is changed. Further, when the operation cord HC or the code equalizer 131 is gripped and the lifting / lowering cord CD is pulled, the bottom rail 101 is raised.

  Also in the blind 130, as in the case of the blind 100, when the bottom rail 101 falls due to its own weight for light shielding, the fall speed is reduced by the operation of the cord braking device 1 and the lower rail 101 is lowered at a low speed.

(Attaching the cord braking device 1 to the head box 102)
In the cord braking device 1, as shown in FIGS. 39 and 40, the lower portion of the cord braking device 1 is inserted into a holding hole serving as a visual recognition portion formed on the bottom plate 102 b of the head box 102. The holding holes are formed in four circular portions of the weight holder accommodating portion 26 so that the bulging portions are formed corresponding to the outer shape of the locking leg portion 83. FIG. 39 shows a state in which the weight holder accommodating portion 26 of the cord braking device 1 is inserted into the holding hole. Therefore, the holding hole is not shown in FIG.

  As shown in FIGS. 39 and 40, when held in the holding hole, the weight holder accommodating portion 26 and the locking leg portion 83 protrude from the bottom plate 102b of the head box 102 downward. In this state, the outer surface of the lid 81 is visually recognized from below the head box 102. A weight 7a is disposed inside the lid portion 81, and a turning motion is performed in order to generate a centrifugal force on the weight 7a during the braking operation of the cord braking device 1. At this time, when the lid portion 81 is formed of a light-transmitting material or a thin material, the turning motion of the weight 7a can be visually recognized, so whether or not the braking operation of the cord braking device 1 is performed. Can be confirmed visually. In addition, the above-described braking operation can be visually recognized even when the turning of the holding leg 73 holding the weight 7a is visible.

In addition to the turning motion of the weight 7a, the braking operation has a portion that can be visually confirmed. In the initial stage of the braking operation, the drive shaft 32b and the idle shaft 33b of the drive roller 32 and the idle roller 33 that sandwich the lifting / lowering cord CD are guided by the cam holes 24a and 24b and are positioned at the restriction positions. The appropriateness of the braking operation can be confirmed by visually recognizing the movement to the restriction position. Further, since the drive shaft 32b continues to rotate after being positioned at the restriction position, the braking operation can be confirmed by visually recognizing this rotation.
Further, during the braking operation, all of the drive gear 35, the internal gear 41, the planetary gear 5, the fixed internal gear 23, and the sun gear 71 rotate or revolve, so that the braking operation can also be confirmed by these operations.

For example, as shown in FIG. 41, when the cord braking device 1 is held in the head box 102 in the opposite state to that shown in FIG. 40, the drive shaft 32b and the idle shaft 33b are exposed (projected) from the bottom plate 102b. Can do. For this reason, the above-described braking operation can be visually recognized. As shown in FIG. 41, when the cord braking device 1 is inverted, the roof plate 95 of the cord guide 9 is not provided.
Furthermore, it is possible to check whether or not the braking operation is appropriate even if it is other than the bottom surface of the head box 102. That is, as shown in FIGS. 42 and 43, if the cord braking device 1 is held by providing a holding hole in the side plate 102c of the head box 102, the braking operation can be confirmed from the side of the head box 102. .
Further, the base 2 and the cap 8 of the cord braking device 1 are partially or entirely formed of a light-transmitting material so that the visibility of the braking operation is good, and the inside of the cord braking device 1 is visually confirmed. It can also be made possible.

  In the above description, the holding hole for holding the cord braking device 1 has been described as an example of the visual recognition portion. However, the structure is not limited to the holding hole, and any structure that can visually recognize the braking operation may be used. It is also possible to use a different structure.

(Preventing the braking member 1 from falling off the head box 102)
As described above, the cord braking device 1 is held by the head box 102 via the holding hole. Incidentally, for example, in the installation structure of the cord braking device 1 shown in FIGS. 32 (A), 34 (B), and 38, the tilt shaft 107 is located closer to the end side than the arrangement position of the cord braking device 1. The support portion 107a of the tilt shaft 107 does not exist. For this reason, there is a possibility that the end side of the tilt shaft 107 may be bent when receiving an external force. On the other hand, as shown in FIG. 40, the tilt shaft 107 is disposed above the cord braking device 1. When an unexpected external force is applied to the cord braking device 1, if the cord braking device 1 collides with the tilt shaft 107 while being detached from the holding hole, the tilt shaft 107 is bent and the cord braking device 1 is detached from the holding hole. There is a risk that.
However, as shown in FIGS. 40 to 43, the head box 102 is provided with an engaging protrusion 102d in which a part of the side wall protrudes inward. For this reason, when the cord braking device 1 is about to be detached from the holding hole, the shoulder portion 95a of the roof plate 95 of the code guide 9 assembled to the cord braking device 1 comes into contact with the engaging protrusion 102d, and the holding hole It is prevented from leaving.

In addition, when an unexpected external force is applied to the code guide 9, a behavior such as vibration of the code guide 9 may occur. If the force due to this behavior acts on components such as the gear and the weight 7a incorporated in the cord braking device 1, the smooth operation of these components may be hindered and the braking operation may be hindered.
However, in the cord guide 9 and the cord braking device 1, as shown in FIGS. 2, 3, 29, and 30, the engagement leg portion 92 c of the cord guide 9 is caused by the engagement weir portion 25 d of the cap holding portion 25. It is restricted from moving. Therefore, behavior such as vibration of the code guide 9 due to unexpected external force is prevented from being transmitted to the cord braking device 1. Accordingly, it is possible to prevent the cord braking device 1 from hindering the braking operation as much as possible.

In addition, the unexpected behavior of the code guide 9 may cause the guide pins 96a and 96b provided in the action side guide port 91 of the code guide 9 and the guide pins 97 provided in the operation side guide port 92 to be detached. There is. That is, these guide pins 96a, 96b, 97 are press-fitted into the upper plates 91a, 92a. For the press-fitting, the guide pins 96a, 96b, A through-hole having a size capable of passing 97 is formed. For this reason, when the guide pins 96a, 96b, 97 are detached from the upper plates 91a, 92a, they may pass through the through holes and fall off the cord guide 9.
However, since the locking projections 25e, 25f, and 25g are provided corresponding to the guide pins 96a, 96b, and 97, the guide pins 96a, 96b, and 97 are detached from the upper plates 91a and 92a. Even in this case, the guide pins 96a, 96b, 97 abut against the locking projections 25e, 25f, 25g. Therefore, the guide pins 96a, 96b, 97 are prevented from being detached from the upper plates 91a, 92a.

(Equalization of load on lifting code CD and prevention of entanglement)
As shown in FIGS. 31, 33, 35, and 37, the elevating cord CD has a different length from the cord braking device 1 to the bottom rail 101. For this reason, the magnitude | size of the load concerning each raising / lowering cord CD differs, and there exists a possibility that the braking force by the cord braking device 1 may not act uniformly. If the braking force becomes uneven, the desired braking action is not exhibited, and the bottom rail 101 may drop without being sufficiently decelerated, or may fall while tilting.

  By the way, the action side guide port 91 and the operation side guide port 92 of the code guide 9 are each partitioned. As shown in FIGS. 21 and 22, this partitioning is performed by guide plates 91d and 92d and guide pins 96a, 96b and 97. And as shown in FIG. 21 and FIG. 44, the action | operation side guide port 91 is divided | segmented into 6 divisions. In addition, as shown in FIG. 44, each division | segment is attached | subjected the code | symbol of (1)-(6). Moreover, as shown in FIGS. 22 and 45, the operation side guide port 92 is divided into four sections. In addition, as shown to FIG. 41, the code | symbol of (A)-(D) is attached | subjected to each division. In addition, as shown in FIG. 46, when a plurality of lifting / lowering cords CD are passed, it is desirable that an appropriate number of them are distributed up and down by guide plates 91d and 92d.

FIG. 47 shows an embodiment in which the lifting / lowering cord CD1 and the lifting / lowering cord CD2 are passed through the cord braking device 1 with different distances (L) from the cord braking device 1 to the part where the bottom rail 101 is suspended. ing. The raising / lowering cord CD1 passes the upper side with respect to any of the guide plates 91d and 92d, and the working side guide port 91 passes the section (3) and the section (B) of the operation side guide port 92 in FIG. . When the lifting / lowering cord CD1 moves, it passes between the guide pin 96a and the guide pin 97 in a state where tension is generated, and in that passage, a load is generated on the lifting / lowering cord CD1. On the other hand, the lifting / lowering cord CD2 passes the lower side of any of the guide plates 91d and 92d, and the action side guide port 91 passes the section (5) and the section (C) of the operation side guide port 92 in FIG. I am letting. For this reason, when this raising / lowering code | cord | chord CD2 moves, a load is not provided in the action side guide port 91. FIG. That is, assuming that the load value generated in the lifting / lowering cord CD1 by passing through the cord braking device 1 is S1, and the load value generated in the lifting / lowering cord CD2 is S2, S1> S2.
On the other hand, assuming that the distances of the lifting / lowering cords CD are L1 and L2, and the magnitude of the distance is L1> L2, the load applied to the large distance L1 is larger than the load applied to the small distance L2. For this reason, the lift code CD2 having a small load generated when passing through the cord braking device 1 is used for the lift code CD having a large distance L1, and the lift code CD1 having a large load is used for the lift code CD having a small distance L2. Thereby, the difference of the load concerning each of raising / lowering cord CD1 and raising / lowering cord CD2 becomes small, and it can aim at stabilization of the braking operation | movement by the cord braking device 1.

  Moreover, in the code | cord | chord capture | acquisition part which provides braking force by pinching the raising / lowering code | cord | chord CD with the drive roller 32 and the idle roller 33, there exists a possibility that upper and lower sides may be switched by the behavior at the time of passage of the raising / lowering cord CD. If this change occurs, these lift cords CD become tangled. If the lifting / lowering cord CD is entangled, the normal operation of the cord braking device 1 is hindered, and the braking function is impaired.

  For this reason, as shown in FIG. 47, the two lifting cords CD1 and CD2 cross each other before and after passing through the cord catching section, and the directions of tension generated in the lifting cords CD1 and CD2 are made different. . This prevents the vertical positional relationship between the lifting / lowering cord CD1 and the lifting / lowering cord CD2 from being switched.

  FIGS. 31 and 33 show a case where the bottom rail 101 is suspended by two lifting cords CD, but when the width of the bottom rail 101, the head box 102, and the slat 103 is increased, FIG. As shown in FIG. 37, the required number of lifting cords CD increases. FIG. 48 shows an embodiment in which three elevating cords CD1, CD2, CD3 pass through the cord braking device 1. The lifting / lowering cord CD1 passes above the guide plates 91d and 92d, passes through the section (2) shown in FIG. 44 at the working side guide port 91, and shown at FIG. 45 at the operation side guide port 92. It passes through the section (B). Further, the lifting / lowering cord CD2 and the lifting / lowering cord CD3 pass below the guide plates 91d and 92d. Further, the lifting / lowering code CD2 passes through the section (6) shown in FIG. 44 at the action side guide port 91 and passes through the section (D) shown in FIG. 45 at the operation side guide port 92. Further, the lifting / lowering cord CD3 passes through the section (5) shown in FIG. 44 at the action side guide port 91 and passes through the section (C) shown in FIG. 45 at the operation side guide port 92.

  That is, the lifting / lowering cord CD2 and the lifting / lowering cord CD2 passing under the guide plates 91d and 92d are arranged so as to cross each other before and after the cord catching portion. Further, since the load applied when the lifting / lowering cord CD1 passes through the cord braking device 1 is the smallest, the lifting / lowering cord CD1 is used as the lifting / lowering cord CD having the largest distance from the cord braking device 1 to the bottom rail 101. Further, the load applied when passing through the cord braking device 1 is larger for the lifting / lowering cord CD2 than for the lifting / lowering cord CD3. It is desirable to use it as a code CD. In addition, the direction of tension generated when these three lifting / lowering cords CD1, CD2, and CD3 pass through the cord braking device 1 is different.

  FIG. 49 shows an embodiment in which four lifting / lowering cords CD1, CD2, CD3, CD4 pass through the cord braking device 1. The lifting / lowering cord CD1 and the lifting / lowering cord CD2 pass above the guide plates 91d and 92d. The lifting / lowering code CD1 passes through the section (2) shown in FIG. 44 at the action side guide port 91 and passes through the section (B) shown in FIG. 45 at the operation side guide port 92. The lifting / lowering cord CD2 passes through the section (1) shown in FIG. 44 at the action side guide port 91 and passes through the section (A) shown in FIG. 45 at the operation side guide port 92. Further, the lifting / lowering cord CD3 and the lifting / lowering cord CD4 pass below the guide plates 91d and 92d. Further, the lifting / lowering cord CD3 passes through the section (6) shown in FIG. 44 at the action side guide port 91 and passes through the section (D) shown in FIG. 45 at the operation side guide port 92. Further, the lifting / lowering code CD4 passes through the section (5) shown in FIG. 44 at the action side guide port 91 and passes through the section (C) shown in FIG. 45 at the operation side guide port 92.

  That is, the lifting / lowering cord CD1 and the lifting / lowering cord CD2 passing above the guide plates 91d and 92d are arranged to cross each other before and after the cord catching portion. Further, the lifting / lowering cord CD3 and the lifting / lowering cord CD4 passing below the guide plates 91d and 92d are arranged so as to intersect before and after the cord catching portion. The lifting / lowering cord CD1 and the lifting / lowering cord CD4 are used as the lifting / lowering cord CD having a large distance from the cord braking device 1 to the bottom rail 101, and the lifting / lowering cord CD2 and the lifting / lowering cord CD3 are distanced from the cord braking device 1 to the bottom rail 101. It is desirable to use as a lift code CD having a small height. In addition, the direction of tension generated when these four lift cords CD1, CD2, CD3, CD4 pass through the cord braking device 1 is different.

  In addition, the form through which the division | segmentation of the action side guide port 91 and the operation side guide port 92 of the raising / lowering cord CD passes is not restricted to the form shown in FIGS. 47-49, It is good also as a form which lets another compartment pass. Further, by increasing the number of sections, the range in which sections for allowing the lifting / lowering cord CD to pass can be increased, and it is possible to easily cope with the load depending on the length of the lifting / lowering cord CD.

  According to the cord braking device and the shielding device including the cord braking device according to the present invention, it is possible to prevent the cord from being entangled as much as possible, and to stabilize the operation of the cord braking device. Contribute to the spread.

DESCRIPTION OF SYMBOLS 1 Code brake device 2 Base 21 Slider accommodating part 21b Operation side opening 21d Operation side opening 21h Locking hole 21i Locking hole 22 Carrier accommodating part 22a Small diameter part 22b Large diameter part 23 Fixed internal gear 24a Cam hole 24b Cam hole 24c Reinforcement rib cam 24d Reinforcement rib cam 24e Cam surface 24f Cam surface 25 Cap holding portion 25a Locking hole 25b, 25c Leg holding portion 25d Engagement weir 25e, 25f, 25g Locking protrusion 26 Weight holder storage 3 Slider 31 Slider bracket 31b Working side Opening 31d Operation side opening 31f1, 31f2 Holding through hole 31g1, 31g2 Holding through hole 32 Drive roller 32b Drive shaft 33 Idle roller 33b Idle shaft 34 Compression coil spring 35 Drive gear 4 Carrier 41 Internal gear 42 Annular support 42a Tapered part 43 Flange part 43b Guide protrusion 44 Support hole 5 Planetary gear 51 Support shaft 6 Slider washer 7 Weight holder 71 Sun gear 73 Holding leg part 73a Step part 7a Weight 8 Cap 81 Cover body part 81a, 81b Rail 82 Support column part 83 Locking leg portion 83a Locking claw 84a Cam groove 84b Cam groove 9 Code guide 91 Working side guide port 91a, 92a Upper plate 91b, 92b Lower plate 91c Engaging leg portion 91d, 92d Guide plate 92 Operation side guide port 92c Engaging leg portion 93a Locking claw part 94a Locking claw part 95 Roof plate 95a Shoulder part 96a, 96b Guide pin 97 Guide pin 100 Blind (shielding device)
110 Blind (shielding device)
120 Blind (shielding device)
130 Blind (shielding device)
101 Bottom rail (shielding material)
102 Head box 102b Bottom plate 102d Engaging protrusion 103 Slat (shielding material)
104 Mounting bracket 105 Locking device 107 Tilt axis O Center of rotation Po Acting side Qi Operating side CD Lifting cord HC operating cord RC Ladder cord

Claims (13)

In the cord braking device for reducing the moving speed in one direction of the shielding material of the cord suspending the shielding material,
A plurality of the codes;
A cord catcher for regulating the movement of the cord;
With
A cord braking device, wherein the plurality of cords pass through the cord catching portion in an intersecting state. In the cord braking device for reducing the moving speed in one direction of the shielding material of the cord suspending the shielding material,
A plurality of the codes;
A cord catcher for regulating the movement of the cord;
With
The cord braking device, wherein directions of tension acting on the plurality of cords passing through the cord catching portion are made different from each other.   The tension of the plurality of cords is generated between an entrance side to the cord catching portion and a exit side from the cord catching portion when passing through the cord catching portion. Cord braking device.   The cord braking device according to any one of claims 1 to 3, wherein a movement guide device is assembled to the cord braking device, and the direction of a plurality of cords is guided by the movement guidance device. In the cord braking device for reducing the moving speed in one direction of the shielding material of the cord suspending the shielding material,
A plurality of the codes;
A cord catching section comprising a rotating roller that catches the moving cord and regulates the movement of the cord;
A movement guide device assembled to the cord braking device;
With
Dividing each of the operation side guide opening and the action side guide opening for the brake device of the cord of the movement guide device into a plurality of sections by a longitudinal section member in a direction parallel to the rotation axis of the roller;
Each of the plurality of cords is allowed to pass through the operation side passage section in the operation side guide opening and the action side passage section in the operation side guide opening at a position not facing the operation side passage section,
A cord braking device, wherein the plurality of cords pass through the cord catching portion in an intersecting state.   The cord braking device according to claim 5, wherein a lateral partition member that intersects with the longitudinal partition member is arranged to divide the operation side guide port and the action side guide port vertically and horizontally.   The cord braking device according to claim 5, wherein a plurality of the longitudinal partition members are provided.   The cord braking device according to any one of claims 5 to 7, wherein the number of sections of the operation side passage section and the operation side passage section is different.   When passing three or more cords, the cords passing through the upper compartments or the lower compartments separated by the transverse compartment members intersecting the longitudinal compartment members intersect at the cord catching section. The cord braking device according to any one of claims 6 to 8, wherein   The cord braking device according to any one of claims 4 to 8, wherein one cord is guided in each of the divided sections.   The cord braking device according to any one of claims 1 to 10, wherein the plurality of cords are overlapped in a direction orthogonal to a moving direction of the cords in a cord capturing unit.   The cord braking device according to any one of claims 1 to 11, wherein planes including a longitudinal direction of the plurality of cords in the cord catching portion are parallel to each other.   A shielding device comprising the cord braking device according to any one of claims 1 to 12.

Images