KR102606316B1 - Braking device and shielding device using it - Google Patents

Abstract

Provided is a braking device capable of appropriately pinching the cord even when the constricting body that pinches the cord becomes smaller due to wear or when the diameter of the lifting cord becomes smaller.
A braking device for braking the longitudinal movement of a cord, comprising a constricting body having a pair of constricting members for constricting the cord, wherein at least one of the constricting members is configured to move in a predetermined movement trajectory, the constricting member comprising: A braking device is provided, wherein the sieve pinches the cord at a predetermined narrowing position of the moving trace, and the moving trace extends beyond the pinching position.

Description

Braking device and shielding device using it

The present invention relates to a braking device and a shielding device using the same, and particularly to a braking device that can be used to appropriately slow down the movement of a lifting cord.

In addition to roll curtains and blinds, semi-automated suspended shielding devices such as accordion curtains, pleated screens, and partitions are used. For example, when opening a horizontal blind, the slats and bottom rail, which are shielding members, can be pulled up by pulling the operating cord. Additionally, when a horizontal blind is opened, the slats and bottom rail are generally lowered by gravity using their own weight. At this time, a mechanism is known to reduce the downward force of the slats and bottom rail by applying a braking force to the lifting cord that moves as the slats and bottom rail fall.

Patent Document 1 describes a damper consisting of a centrifugal governor that generates braking force and a shaft (a constrictor that constricts the cord) connected to the brake unit, wherein the lifting cord contacts the outer peripheral surface of the axis, and the lifting cord A blind lifting device equipped with a damper is disclosed, wherein the corresponding axis rotates due to the movement of and the corresponding brake unit operates. By using this damper, it is possible to reliably provide resistance to movement of the lifting cord due to lowering of its own weight.

Japanese Patent Publication No. 2005-030084

However, in the damper disclosed in Patent Document 1, when the constrictor is worn due to friction with the lifting cord and the diameter of the constrictor becomes small or the diameter of the lifting cord becomes small, it does not provide adequate resistance to the cord. It cannot be granted.

The present invention has been implemented in light of these circumstances, and provides a braking device capable of appropriately clamping the cord even when the constricting body that pinches the cord becomes smaller due to wear or when the diameter of the lifting cord becomes smaller.

According to the present invention, there is provided a braking device for braking the longitudinal movement of a cord, comprising a constricting body having a pair of constricting members for constricting the cord, wherein at least one of the constricting members moves in a predetermined movement trajectory. A braking device is provided, wherein the constrictor constricts the cord at a predetermined constriction position of the movement trajectory, and the movement trajectory extends beyond the constriction position.

According to the present invention, the cord can be pinched at a predetermined pinching position by moving at least one of the pinching members in a predetermined movement trajectory, and the movement trajectory extends beyond the pinching position. With this configuration, before wear of the constrictor, the cord is pinched at a predetermined constriction position, and after wear of the constrictor, the constrictor is moved to a range on a movement trajectory extending beyond the predetermined constriction position, so that after wear of the constrictor, the cord is pinched at a predetermined constriction position. Even then, braking performance can be maintained by properly tightening the cord. Additionally, the same effect is achieved even when the diameter of the cord becomes smaller due to wear of the cord.

Below, various embodiments of the present invention are illustrated. The embodiments shown below can be combined with each other.

Preferably, the movement trajectory extends in a direction towards the cord.

Preferably, the movement trajectory is a trajectory of movement of at least one of the constricting members along a regulation groove that regulates the movement of at least one of the constricting members.

Preferably, a case is provided that encloses at least one side of the constricting member and has the regulating groove.

Preferably, the constriction body is formed by a first constriction member and a second constriction member, the first constriction member having a shaft, and the regulating groove is formed such that the shaft is accessible to the cord, The constricted position is a position spaced apart from the end of the regulating groove on the side in the direction of approach to the cord.

Preferably, the pair of constrictors move together in the movement trajectory, and the movement trajectory is configured such that its extension lines intersect each other.

Preferably, the second constriction member has an axis, and the regulating groove allows the cord to be clamped at a predetermined pinching position by the axes of the first and second constricting members moving along the regulating groove. It is composed.

Preferably, two regulating grooves are formed in the case, and at least one has an arc shape.

Preferably, the two regulating grooves are configured to be inclined with respect to the direction of movement of the cord.

Preferably, the two regulating grooves have different curvatures.

Preferably, the axis is arranged approximately vertically.

Preferably, the second constriction member is comprised by a constriction plane.

Preferably, the constriction plane is a fixed plane before and after movement of the first constriction member.

Preferably, the first clamping member is provided with a biasing member that biases the first clamping member from the release position at which the cord is released toward the pinching position at which the cord is clamped.

Preferably, a guide wall is formed along the edge of the regulating groove.

Preferably, a shielding device is provided, which includes the braking device according to any one of the above claims and a shielding member suspended and supported so as to be capable of being raised and lowered by movement of the cord.

Preferably, the second constriction member includes a braking device constituted by a constriction plane, a shield member suspended and supported so as to be capable of being raised and lowered by movement of the cord, and a head box containing the brake device, and the second constriction member includes the constriction plane. A shielding device is provided that is the bottom of the head box.

1 is a diagram showing an example of a shielding device 100A according to the first embodiment of the present invention.
Figure 2 is an exploded perspective view of the braking device 1000 according to the first embodiment of the present invention, (a) is a view seen from the front top, and (b) is a view seen from the rear top.
Figure 3 is an exploded perspective view of the braking device 1000 according to the first embodiment of the present invention, (a) is a view seen from the front lower side, and (b) is a view viewed from the rear lower side.
Figure 4 is an assembled view of a braking device 1000 according to one embodiment of the present invention, where (a) is a front perspective view, (b) is a rear perspective view, and (c) is a left side view.
Figure 5 is an assembly view of the braking device 1000 according to the first embodiment of the present invention, where (a) is a top view and (b) is a bottom view.
Figure 6 is an assembled view of the case 10A removed from the braking device 1000 according to the first embodiment of the present invention, where (a) is a front perspective view and (b) is a rear perspective view.
Figure 7 is an assembly view with the slider 220 further removed from Figure 6, where (a) is a front perspective view and (b) is a rear perspective view.
Figure 8 is an assembled view of the carrier 260 with internal teeth removed from Figure 7, where (a) is a front perspective view and (b) is a rear perspective view.
Figure 9 is a cross-sectional view showing the positional relationship between the knurling 240, the slider 220, and the pinion gear 50 according to the first embodiment of the present invention, and the shaft center 31 when viewed from the left side of the braking device 1000. It is a part of a cross section that passes almost through the center of.
Figure 10 is a diagram showing the alignment member 200 according to the first embodiment of the present invention, where (a) is a perspective view and (b) is a front view.
Figure 11 is a view showing the case 10A according to the first embodiment of the present invention, (a) is a front perspective view, and (b) is a rear perspective view.
Fig. 12 is a view showing the case 10A according to the first embodiment of the present invention, where (a) is a plan view and (b) is a perspective view seen from below.
Figure 13 is a view showing the slider 220 according to the first embodiment of the present invention, (a) is a front perspective view, (b) is a rear perspective view seen from below, and (c) is a top view.
Figure 14 is a diagram showing the case 10A and the slider 220 according to the first embodiment of the present invention, where (a) is a perspective view seen from the bottom and (b) is a perspective view seen from the top.
Figure 15 is an exploded perspective view showing members other than the case 10A and the slider 220 according to the first embodiment of the present invention.
Figure 16 is a cross-sectional view taken along line AA of Figure 4(c).
Figure 17 is a cross-sectional view taken along line BB in Figure 5(a).
Figure 18 is a diagram showing how the braking device 1000 of the present invention brakes the cord (CD) using Figure 16, and (a) is a state in which no tension is given to the cord (CD) (normal state). , (b) is a state in which tension is applied to the cord (CD) and the cord (CD) is constricted by the knurling (240) and the roller part 42 (constricted state), (c) is (c) from (a) This is a diagram summarizing the rotation direction of each member when the state changes to b).
Fig. 19 is a diagram showing the movement of the slider 220 corresponding to Fig. 18.
Fig. 20 is a diagram for explaining a predetermined constriction position of the constrictor (roller portion 42) in its initial state (before wear) and the constriction position after wear.
Figure 21 is a diagram showing a member used in the motion conversion unit according to the second embodiment of the present invention, and (a) shows a shape in which the knurling 240 and the roller unit 42 are connected by the plate 800. , (b) shows a shape in which the knurling 240 and the roller portion 42 are connected by the string-shaped member 900.
Fig. 22 is a schematic diagram of the state in which the member in Fig. 21(b) pinches the cord CD, as seen from the arrow Z direction.
Figure 23 is a diagram showing how the cord CD is braked by the motion conversion unit according to the second embodiment of the present invention, (a) is a diagram showing a free movement state, and (b) is a diagram showing a constricted state.
Figure 24 is a diagram showing how the cord CD is braked by another motion conversion unit according to the third embodiment of the present invention, (a) is a diagram showing a free movement state, and (b) is a diagram showing a constricted state.
Figure 25 is a diagram explaining the motion conversion unit according to the fourth embodiment of the present invention, (a) is a diagram showing a free movement state, and (b) is a diagram showing a constricted state.
Figure 26 is a diagram explaining a motion conversion unit according to a modified example of the fourth embodiment of the present invention, (a) showing a free movement state and (b) a diagram showing a constricted state.
Figure 27 is a diagram explaining a motion conversion unit according to a modified example of the fourth embodiment of the present invention, and even when the diameter of the knurling 240 is reduced due to wear, the cord CD can be appropriately narrowed. This is a drawing to explain the shape.
Figure 28 is a perspective view of a braking device 5000 according to the fifth embodiment of the present invention.
Figure 29 is a top view of the braking device 5000.
Figure 30 is a front view of the braking device 5000, where (a) shows a constricted state and (b) shows a released state.
Figure 31 is a cross-sectional view taken along line PP in Figure 30.
Figure 32 is a diagram showing how the inner cylinder 42A is press-fitted into the outer cylinder 240A, with (a) before press-fitting and (b) after press-fitting.
Fig. 33 is a diagram showing an example of providing the elastic portion 42Aa on the surface of the inner cylinder 42A.
Fig. 34 is a diagram showing an example of installing the spring member 42Ab in the inner cylinder 42A.
Figure 35 is a diagram showing a braking device 5100 according to Modification 1 of the fifth embodiment of the present invention.
Figure 36 is a diagram showing a braking device 5200 according to Modification 2 of the fifth embodiment of the present invention, where (a) shows a constricted state and (b) shows a released state.
Figure 37 is a cross-sectional view taken along line FF of Figure 36.
Figure 38 is an explanatory diagram showing the braking device 5300 according to Modification 3 of the fifth embodiment of the present invention, (a) showing the state in which the cord CD is constricted by the constrictor, and (b) showing the state in which the cord CD is constricted by the constrictor. Indicates that the stenosis of the cord (CD) has been released.
Figure 39 is a cross-sectional view of the braking device 5300 of Figures 38(a) and 38(b) cut along line JJ in the same figure.
Figure 40 is a cross-sectional view of the braking device 5300 of Figures 38(a) and 38(b) when cut along line KK in the same figure.
Figure 41 is a schematic perspective view showing the constrictor and link mechanism 720 of the braking device 6000 according to the sixth embodiment of the present invention.
FIG. 42 is a cross-sectional view of FIG. 16 to show a state in which the constrictor and link mechanism 720 of the braking device 6000 of FIG. 41 are combined with the motion conversion unit DT of the first embodiment. This is a plan view schematically showing the mechanism 720.
Figure 43 is a diagram showing how the braking device 6000 of Figure 41 brakes the cord CD, (a) showing the state in which the cord CD is constricted by a constrictor, and (b) showing the state in which the cord CD is constricted by the constrictor. CD) indicates a state in which the stenosis has been released.
Figure 44 is a diagram for explaining another installation position of a braking device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the braking device according to the present invention and the solar radiation shielding device using the same will be described in detail with reference to the drawings.

1. First embodiment

1-1 <Overall composition>

In the shielding device 100A shown in FIG. 1, a plurality of stages of solar radiation shielding members 101 are suspended and supported from a hollow head box 130 through a plurality of ladder cords 123, and at the bottom of the ladder cord 123 The bottom rail 122 is suspended. The head box 130 is composed of a top surface 131, a bottom surface 132, and a side surface 133. Then, box caps 134 are installed at both ends. Additionally, inside the head box 130, a code outlet 135 for inserting a code CD into the operating rod 108 is provided. The configuration of the ladder cord 123 is not limited as long as it can support and rotate the solar radiation shielding member 101. For example, the ladder cord 123 is provided with two threads separated from each other, and one thread is connected to one side of the slat. It may be mounted on the end of the slat, and the filament on the other side may be mounted on the other end of the slat.

A plurality of support members (not shown) are disposed in the head box 130, and a tilt drum (not shown) is rotatably supported on the support members. The upper end of the ladder cord 123 is mounted on a tilt drum, and at the center of the tilt drum, a shaft 124 (axial member) is subtracted from all tilt drums. Therefore, when the shaft 124 is rotated, all tilt drums are rotated, and as the tilt drums rotate, one side of the vertical axis of the ladder cord 123 is pulled up, thereby causing each solar radiation shielding member 101 and the bottom rail ( 122) is angle adjusted in phase.

An operating rod 108 made of a cylindrical body is suspended and supported at one end of the head box 130, and an operating unit 120 is installed at the lower end of the operating rod 108. When the operating unit 120 is held and the operating rod 108 is rotated, it is rotated to the angle adjustment axis through a gear mechanism provided in the head box 130. Therefore, the angle of each solar radiation shielding member 101 can be adjusted by rotating the operating rod 108.

From the head box 130, a plurality of (three in this embodiment) lifting cords 102l, 102c, and 102r (if distinction is not necessary, are simply referred to as “lifting cords 102”) are suspended, and each One end of the lifting cord 102 is mounted on the bottom rail 122. On each support member, a forward sheave (not shown) is axially supported in the front and back directions of the drawing, so that the lifting cord 102 introduced into the head box 130 can be guided forward in the left and right directions of the head box. Additionally, each support member has a space through which other lifting cords can pass in the left and right directions. Accordingly, the other end of the right-side lifting cord 102r is guided forward by the support member, and the non-operating side lifting cord (left end and center lifting cords 102l, 102c) is guided inside the head box 130 via each support member. It is guided in the direction of the operating rod (108). Then, it is inserted into the cylindrical operating rod 108 through the lock portion 104 and the braking device 1000 installed in the head box 130, and its tip is connected to the code equalizer 121 installed below the operating portion 120. Connected. Accordingly, when the cord equalizer 121 is pulled downward and the lifting cord 102 is pulled out from the head box 130, the bottom rail 122 is pulled up and the solar radiation shielding member 101 is pulled up.

The lock unit 104 permits or regulates the movement of the cord CD (see FIG. 4) according to the operation of the cord CD (see FIG. 4).

The braking device 1000 brakes the movement of the code CD. Additionally, the configuration and operation of the braking device 1000 will be described later. The braking device 1000 is disposed on the bottom surface 132 of the head box 130 and both ends thereof are positioned by the side surfaces 133. Additionally, instead of arranging the braking device 1000 on the bottom surface 132, it may be arranged on another member installed on the bottom surface 132.

The braking device 1000 is arranged within the head box 130 so that the front shown in FIG. 4 faces the lock portion 104 and the rear faces the cord outlet 135 side. Therefore, the solar radiation shielding member 101 is lowered to the end, that is. In the closed state of the shielding device 100A, when one set of cords CD is pulled downward, the cords CD are pulled backward as shown in Fig. 4.

Meanwhile, in a state in which the solar radiation shielding member 101 has not been lowered all the way, the cord CD is placed in a state in which the cord CD is not locked by the lock portion 104. Then, the solar radiation shielding member 101 descends by its own weight. For this reason, the lifting cord 102 is pulled out from inside the head box 130. Accordingly, the cord CD connected to the lifting cord 102 is pulled toward the front of the braking device 1000. Then, a braking force is given to the code CD. Therefore, the descending speed of the solar radiation shielding member 101 can be suppressed. For this reason, damage, etc. caused by excessive lowering speed of the solar radiation shielding member 101 can be suppressed. Additionally, this operation will be explained in detail using FIG. 18 described later.

As explained above, according to the shielding device 100A of the present embodiment, the braking force is appropriately applied by the braking device 1000 with respect to the movement in the longitudinal direction of the cord CD that enables the solar radiation shielding member 101 to be raised and lowered. Because it is provided, for example, as described above, even when the solar radiation shielding member 101 descends due to its own weight, the descending speed of the solar radiation shielding member 101 can be suppressed.

1-2 <Brake device>

Next, the braking device 1000 will be described using FIGS. 2 to 20. The braking device 1000 according to this embodiment is a braking device that brakes the movement of the cord. Specifically, in the braking device 1000 according to the present embodiment, the mechanism corresponding to the motion conversion unit and the mechanism corresponding to the resistance applying unit are installed so as to be positioned almost vertically. In this embodiment, the motion conversion unit converts the movement of the cord CD into the motion of other members. Additionally, the resistance imparting unit generates a resistance force according to the movement of the cord CD when the cord CD moves relative to one direction. Here, in this embodiment, the slider 220, the coil spring (SP), the idle roller 40 consisting of the shaft center 41 and the roller portion 42, the knurling 240, the pinion gear 50, and the shaft center (31), washer 241, carrier with internal teeth 260 and planetary gear 280 constitute a motion conversion unit, and weight 340, sun gear weight holder 320 and case 10A constitute a resistance imparting unit. Compose.

Figures 2 and 3 are exploded perspective views of the braking device 1000 according to this embodiment. The braking device 1000 includes an alignment member 200, a case 10A, a slider 220, a coil spring (SP), an idle roller 40 consisting of an axis 41 and a roller unit 42, and a knurling 240. , pinion gear 50, knurling 240, and shaft center 31 inserted and passing through the pinion gear 50, washer 241, carrier with internal teeth 260, planetary gear 280, plate 300. , It is composed of a sun gear weight holder 320, a weight 340, and a base 70.

In this embodiment, the idle roller 40 and the knurling 240 are a pair of constricting members (a first constricting member and a second constricting member) that pinch the cord, and they function as a constricting body by working together. do. In addition, the idle roller 40 functions as a support and the knurling 240 functions as a roller that rotates by movement of the cord in the longitudinal direction. Additionally, the slider 220 maintains the idle roller 40 and the knurling 240. Additionally, the case 10A and the base 70 are formed of resin, for example.

2 and 3, in this embodiment, four planetary gears 280 are installed on a carrier 260 with internal teeth, and eight weights 340 are held on a sun gear weight holder 320. . Hereinafter, each member will be described.

1-2-1 <Alignment member (200)>

As shown in FIGS. 4(a) and 4(b), the alignment member 200 inserts the cord CD and adjusts the direction of the cord CD. Additionally, multiple codes (CDs) are aligned in the same direction. The alignment member 200 can be formed of, for example, a resin such as plastic. Here, as shown in FIG. 4(a), the directions of the arrows are forward and backward, left and right, and up and down, respectively. In other words, the direction in which the distance between the first and second heavenly wall grooves (16) and the second heavenly wall grooves (17) narrows is set to the front, and the left and right directions (width direction) and up and down directions are determined.

As shown in FIG. 10(a), the alignment member 200 includes a front wall portion 205, a right wall portion 207 and a left wall portion 208 connected to the front wall portion 205, and a right wall portion 207. ) and a rear wall portion 206 connected to the left wall portion 208, respectively. The shapes of the front wall 205, right wall 207, left wall 208, and rear wall 206 are arbitrary, but in this embodiment, each has a substantially spherical (rectangular) shape. Additionally, in this embodiment, the front wall portion 205 and the rear wall portion 206 have substantially symmetrical shapes.

The front wall portion 205 is formed with a first front groove 201, a first front cord insertion portion 201A, a second front groove 202, and a second front cord insertion portion 202A. Additionally, the rear wall portion 206 is formed with a first rear groove 203, a first rear cord insertion portion 203A, a second rear groove 204, and a second rear cord insertion portion 204A.

The first front code insertion portion 201A and the second front code insertion portion 202A are for inserting the cord CD into the alignment member 200 after assembly of the braking device 1000. The first front cord insertion portion 201A is formed to be wider than the first front groove 201. Additionally, the second front cord insertion portion 202A is formed to be wider than the second front groove 202. Therefore, the code (CD) is inserted into the first front code insertion portion 201A and the second front code insertion portion 202A, and the code (CD) is inserted into the first front groove 201 and the second front groove 202 as is. ), it becomes possible to smoothly insert the code (CD).

In addition, the first rear code insertion portion 203A and the second rear code insertion portion 204A are inserted into the front wall 205 so that the code (CD) passed through the through hole 225 before and after the slider 220, which will be described later. ) (see FIG. 13) and to draw this cord (CD) out from the rear wall portion 206. The first rear code insertion portion 203A is formed to be wider than the first rear groove 203. Additionally, the second rear cord insertion portion 204A is formed to be wider than the second rear groove 204. Therefore, the code (CD) is inserted and passed through the first rear code insertion portion 203A and the second rear code insertion portion 204A, and the code (CD) is inserted into the first rear groove 203 and the second rear groove 204. By sliding the CD, it becomes possible to smoothly insert and pass the code (CD).

Meanwhile, the shapes of the first front cord insertion part 201A, the second front cord insertion part 202A, the first rear cord insertion part 203A, and the second rear cord insertion part 204A are arbitrary, and are shown in Figure 10 It is not limited to the shape shown. For example, it may be substantially circular, or may be connected to the first front groove 201 (the same applies to other grooves) through a shape inclined from a vertically long shape. Additionally, in this embodiment, a step 210 is provided between the first front cord insertion portion 201A and the first front groove 201, but without providing this step 210, the front wall portion 205 ) (or the rear wall portion 206) may be substantially spherical.

As shown in Fig. 10(b), in this embodiment, the front wall portion 205 and the rear wall portion 206 have substantially the same shape when viewed from the front. Accordingly, the code (CD) inserted and passed from the first front code insertion portion 201A passes through the first rear code insertion portion 203A, and the code inserted and passed from the second front cord insertion portion 202A ( CD) passes through the second rear cord insertion portion 204A. That is, the first front groove 201 and the first front code insertion portion 201A and the first rear groove 203 and the first rear code insertion portion 203A are a pair of corresponding grooves, and the second front groove 203 The groove 202 and the second front cord insertion portion 202A, and the second rear groove 204 and the second rear cord insertion portion 204A are a pair of corresponding grooves.

Here, as shown in FIG. 10(a), when the right wall portion 207 of the alignment member 200 is integrated by covering it from above the case 10A when assembling the braking device 1000, A claw portion 209 is provided to engage with the engaging hole 19 (see Fig. 11) of the case 10A, which will be described later, and to secure the alignment member 200 to the case 10A. . In addition, although not shown in Fig. 10, the same claw portion 209 is provided so as to face the inner surface of the left wall portion 208. Accordingly, the right wall portion 207 and the left wall portion 208 elastically deform in the outward direction and the upper part of the case 10A enters, and the two claw portions 209 installed on the alignment member 200 and the left and right sides of the case 10A It becomes possible for the two installed engaging holes 19 to be elastically engaged.

1-2-2 <Case (10A)>

Next, case 10A will be described using FIGS. 11(a), 11(b) and 12. In addition, in Fig. 12, the left direction will be described as the front, the right direction as the rear, the upward direction as the right, and the downward direction as the left. The case 10A constitutes a housing together with the base 70, and inside the slider 220, a coil spring (SP), an idle roller 40 consisting of an axis 41 and a roller portion 42, and a knurling (240), pinion gear (50), shaft center (31), washer (241), carrier with internal teeth (260), planetary gear (280), plate (300), sun gear weight holder (320) and weight (340) ) is maintained.

Additionally, the case 10A constitutes the housing of the braking device 1000 together with the base 70 shown in Fig. 15, for example. Additionally, for example, together with the sun gear weight holder 320 and the weight 340 shown in FIG. 15, a resistance imparting portion is formed.

As shown in FIG. 11, the case 10A includes a ceiling wall portion 11 having a substantially square outer shape, a front side wall portion 12f, a front side wall portion 12f, and a ceiling wall portion 11. ), the right wall portion 12r and the left wall portion 12l connected to each other, the rear wall portion 12b connected to each of the right wall portion 12r and the left wall portion 12l, and facing the ceiling wall portion 11, A buttock (13) extending radially from the front wall (12f), the rear wall (12b), the front wall (12f), and the left wall (12l). It has as its main structure a cylindrical portion 13C connected to and a cover portion 112 connected to the cylindrical portion 13C.

A guide groove 113 is formed in the front wall portion 12f and the rear wall portion 12b. These two guide grooves 113 face each other in the front-back direction. This guide groove 113 is a groove through which the cord CD is inserted and passed in the front-back direction. Here, the number of codes (CD) inserted and passed through the guide groove 113 is not particularly limited, but in this embodiment, an example in which three codes (CD) are inserted and passed in the vertical direction is shown (Figure 4).

Additionally, engaging holes 19 are provided in the right wall portion 12r and the left wall portion 12l. As already mentioned, the engaging hole 19 engages with the claw portion 209 of the alignment member 200 and secures the alignment member 200 to the case 10A.

In addition, support grooves 114 are provided above the engaging holes 19 on the left and right. As shown in FIG. 4, the support groove 114 supports the protrusion 230 installed on the slider 220 when the case 10A holds the slider 220 inside. Therefore, the slider 220 can be supported in an open state. Details will be described later.

In the top wall portion 11, a first top wall groove 16 and a second top wall groove 17 are formed. As shown in FIG. 12(a), the first ceiling groove 16 and the second ceiling groove 17 are each formed inclined with respect to the longitudinal direction of the cord CD, that is, the front-back direction, and are formed at an angle to one side of the cord CD. The distance between the first and second ceiling grooves 16 and 17 becomes smaller as it moves forward in the longitudinal direction. That is, the first ceiling groove 16 is formed in an arc shape and has an inner peripheral surface formed by a constriction guide slope 16a, a release guide slope 16b, a constriction side regulation surface 16c, and a release side regulation surface 16d. This is formed. The circular arc of the first ceiling groove 16 is formed to be concentric with the inner peripheral surface of the carrier 260 with internal teeth shown in FIG. 7 when viewed in plan. In addition, the second ceiling groove 17 is formed in a gently curved shape and is controlled by the constriction guide slope 17a, release guide slope 17b, constriction side regulation surface 17c, and release side regulation surface 17d. The inner circumference is formed. Specifically, the front side of the second ceiling groove 17 has a substantially straight shape, and it curves in a direction away from the first ceiling groove 16 as it moves toward the rear. This is because, when the second ceiling groove 17 is made substantially straight, the first ceiling groove 16 is an arc approaching the cord CD from the rear to the front, for example, the axis center 31. And when the shaft center 41 moves along the first ceiling groove 16 and the second ceiling groove 17, respectively, the displacement in the vertical direction with respect to the cord CD is different between the shaft center 31 and the shaft center 41. This is to prevent That is, if one side is circular and the other side is almost straight, the vertical distance to the code CD is different in the front and rear directions. In this way, by approaching the displacement of the shaft center 31 and the shaft center 41 with respect to the vertical direction of the cord CD, it is possible for the knurling 240 and the roller portion 42 to appropriately narrow the cord CD. do. In addition, the second ceiling groove 17 is not limited to this, and for example, a groove of substantially the same shape as the first ceiling groove 16 may be arranged to be curved toward the cord CD. Therefore, the displacement in the vertical direction with respect to the CD can be made approximately the same at the shaft center 31 and the shaft center 41, making it possible to reduce wear of the cord (CD). Here, in the second embodiment, in addition to making the displacement in the vertical direction with respect to the cord (CD) the same as possible in the shaft center 31 and the shaft center 41, interactions due to movement of other members, etc. are taken into consideration, as shown in Figure 12 ( The shape shown in a) was used. Here, in this embodiment, it can be said that the first top wall groove 16 and the second top wall groove 17 have different curvatures.

At the edge of the first ceiling groove 16, when viewed from the plane of the case 10A, as shown in FIGS. 11(a) and 12(b) and FIG. 12(a), there is a A first guide wall 16A protruding upward from the first ceiling wall groove 16 is provided at at least a portion of the position along the outer edge of the case 10A. In this embodiment, the first guide wall 16A is installed at an angle of approximately 90 degrees with respect to the first ceiling wall groove 16. The purpose of the first guide wall 16A is to lower the surface pressure of the shaft 31 moving along the first ceiling wall groove 16. That is, by providing the first guide wall 16A, the area in contact with the shaft center 31 increases, thereby reducing the surface pressure of the shaft center 31. This means that while tension is applied to the cord (CD) and the braking device 1000 is acting, the surface pressure of the shaft center 31 is applied to the inner surface of the first ceiling groove (16), and this surface pressure causes the first ceiling groove (1000) to This is because if the inner surface of (16) is shaved, the gap between the knurling 240 and the roller portion 42 changes, and there is a risk that rotation transmission to the knurling 240 becomes insufficient. By providing the first guide wall 16A, it is possible to prevent the case 10A from being chipped due to pressure from the shaft center 31. Additionally, the thickness of the first guide wall 16A is arbitrary, but may be designed appropriately taking into account the material of the case 10A, the moving speed of the shaft 31, etc.

In addition, when viewed from the plane of the case 10A, the position along the outer edge of the case 10A in the second ceiling wall groove 17 is a position along the edge located far from the center of the case 10A. A second guide wall 17A protruding upward from the second ceiling wall groove 17 is provided on at least a portion of the . In this embodiment, the second guide wall 17A is installed at an angle of approximately 90 degrees with respect to the second ceiling wall groove 17. The purpose of the second guide wall 17A is to lower the surface pressure of the shaft 41 moving along the second ceiling wall groove 17. That is, by providing the second guide wall 17A, the area in contact with the shaft center 41 increases, thereby reducing the surface pressure of the shaft center 41. This means that while tension is applied to the cord CD and the braking device 1000 is acting, the surface pressure of the shaft center 41 is applied to the inner surface of the second top wall groove 17, and this surface pressure causes the second top wall groove to This is because if the inner surface of (17) is chipped, the distance between the knurling 240 and the roller portion 42 changes, and there is a risk that rotation transmission to the knurling 240 may become insufficient. By providing the second guide wall 17A, it is possible to prevent the case 10A from being chipped due to pressure from the shaft center 41. Additionally, the thickness of the second guide wall 17A is arbitrary, but may be designed appropriately taking into account the material of the case 10A, the moving speed of the shaft center 41, etc.

On the other hand, when the case 10A is molded from a strong material such as metal, the first guide wall 16A and the second guide wall 17A do not need to be installed. This is because the case 10A is sturdy, so the case 10A is hardly dented by the pressure from the shaft center 31 and the shaft center 41.

The jaw portion 13 is a portion that faces the top wall portion 11 and extends radially from the front wall portion 12f, the rear wall portion 12b, the right wall portion 12r, and the left wall portion 12l, In this embodiment, it has an almost circular shape.

The cylindrical portion 13C is connected to the jaw portion 13 and is located outside the inner peripheral gear 115. In this embodiment, the cylindrical portion 13C has a substantially cylindrical shape.

The cover portion 112 is a portion connected to the cylindrical portion 13C and fitted with the base 70. In this embodiment, the outer edge of the cover portion 112 is substantially square. And, as shown in FIG. 12, the cover portion 112 is provided with two first engaging grooves 111A at both ends of the left and right sides, respectively. In addition, two second engaging grooves 111B are installed at both ends of the front end, and one second engaging groove 111B is installed almost in the center of the rear end. The first engaging groove 111A engages with the first engaging plate portion 701A of the base 70 shown in FIG. 15. Additionally, the second engaging groove 111B engages with the second engaging plate portion 701B of the base 70. Accordingly, the case 10A and the base 70 are engaged to form a housing.

Next, the internal structure of case 10A will be described using Fig. 12(b), Fig. 14(a), and Fig. 16. Inside the case 10A, as shown in FIG. 16, a ring-shaped inner peripheral gear 115 that meshes with the planetary gear 280 is formed. And, as shown in Fig. 12(b) and Fig. 14(a), a wave-shaped portion 116 that is substantially ring-shaped in plan view is formed on the upper part of the inner peripheral gear 115. The wave-shaped portion 116 has small and large horizontal distances from the center of the circle passing through the center of the inner gear 115 arranged alternately, and has a zigzag shape when viewed from the top. Specifically, it constitutes a polygonal shape formed by connecting a number of straight lines. Here, in this embodiment, a portion with a large horizontal distance from the center of the circle passing through the center of the inner gear 115 is in contact with a part of the carrier 260 with internal teeth, and the center of the inner gear 115 is The wave-shaped portion 116 is configured so that the portion with a small horizontal distance from the center of the passing circle does not come into contact with the carrier 260 with internal teeth. Additionally, steps 117 having different heights in the vertical direction of the case 10A are provided on the inner surface of the jaw portion 13 inside the case 10A. By providing the wave-shaped portion 116 and the step 117, for example, a carrier 260 with internal teeth, which is an example of a rotating member that rotates around a physical or virtual rotation axis in the vertical direction according to the movement of the code CD, etc. It is possible to easily determine the position of other members and reduce frictional resistance. In addition, since the carrier 260 with internal teeth in this embodiment is a rotating member and is provided with a planetary gear 280, the rotational speed of the knurling 240 according to the movement of the cord CD in one direction It can also be called a speed increasing member that increases the speed and transmits it to the resistance imparting unit (RA). Here, the physical or virtual axis of rotation is the center point when the rotation axis of the rotating member is a physical axis, or when there is no physical axis but a virtual axis (e.g., the center point when viewed from the plane of the weight holder 320 (see FIGS. 2 and 3) refers to the case where the vertical axis passes through .

Additionally, as shown in FIG. 14, four grooves 118 are formed on the left and right inner surfaces of the case 10A. The groove 118 is for passing the protrusion 230 of the slider 220, which will be described later, when assembling or disassembling the braking device 1000. In this embodiment, since the slider 220 has four protrusions 230, four grooves 118 are also provided in the case 10A.

1-2-3 <Slider (220)>

Next, the slider 220 will be described using FIG. 13. The slider 220 corresponds to a moving member that holds the idle roller 40 and the knurling 240 inside and moves together with the idle roller 40 and the knurling 240 at the same time. The slider 220 is connected to the ceiling wall 221 and the rear wall 222 and the front wall 224 connected to the ceiling wall 221, and to the rear wall 222 and the front wall 224, respectively. It has a bottom wall portion 223.

The ceiling wall portion 221 has an almost spherical shape with a pair of grooves formed thereon. These pair of grooves each consist of a first top wall groove 226 and a second top wall groove 227. The first top wall groove 226 and the second top wall groove 227 each consist of straight grooves extending along the left and right directions, and are arranged in a straight line with each other.

The bottom wall portion 223 faces the ceiling wall portion 221. In this embodiment, the bottom wall portion 223 has roughly the same shape as the top wall portion 221. However, the top wall portion 221 and the bottom wall portion 223 may have different shapes. A pair of grooves arranged in a straight line in the left and right direction are also formed in the bottom wall portion 223, and these pair of grooves are each composed of a first bottom wall groove 228 and a second bottom wall groove 229. . The first bottom wall groove 228 faces the first top wall groove 226 in the vertical direction, and the second bottom wall groove 229 faces the second top wall groove 227 in the top and bottom direction. Therefore, when the slider 220 is viewed from the top, the upper and lower grooves appear to overlap, as shown in Fig. 13(c).

Here, the width of the first top wall groove 226 and the first bottom wall groove 228 is approximately larger than the diameter of the shaft center 31. Additionally, the width of the second top wall groove 227 and the second bottom wall groove 229 is large enough to accommodate the shaft 41.

Additionally, protrusions 230 are installed at the four corners of the ceiling wall portion 221 so as to protrude from the left and right sides of the ceiling wall portion 221. As shown in FIG. 4, the protrusion 230 is stored in the support groove 114 of the case 10A and is used to support the slider 220 in a floating state inside the case 10A. That is, the slider 220 is maintained in a non-contact state with the carrier 260 with internal teeth located below.

A through hole 225 is formed in the front wall portion 224 and the rear wall portion 222. The through hole 225 is located at approximately the center of the width direction of the front side wall portion 224 and the rear side wall portion 222 and penetrates the front side wall portion 224 and the rear side wall portion 222 in the anteroposterior direction. The shape of the hole is arbitrary, but is such that at least one cord (CD) can be inserted. Preferably, it has a shape that allows insertion with a plurality of codes (CDs) aligned in the vertical direction. On the other hand, in this embodiment, it has a substantially elliptical shape that is elongated in the vertical direction.

In addition, as shown in FIG. 13(b), recessed portions 231 formed from the outer surface of the rear wall portion 222 are formed on both sides of the through hole 225 in the rear wall portion 222. The shape of the recess 231 is arbitrary, and may be a shape notched from the through hole 225 to the side surface as shown in FIG. 13(b), or may be a substantially circular or almost spherical concave surface. . Additionally, in this embodiment, the coil spring SP is disposed in the left recessed portion 231, and one end of the coil spring SP protrudes from the recessed portion 231. Then, when assembling the braking device 1000, it comes into contact with the inner wall of the case 10A and pushes the slider 220 forward. Meanwhile, in Figure 13, the portion protruding from the main portion 231 of the coil spring SP is omitted. Additionally, a coil spring (SP) may be disposed within the recessed portion 231 on the right side. Additionally, coil springs SP may be disposed within the recessed portions 231 on both left and right sides.

The size of the slider 220 of this shape in the left and right directions is almost equal to the distance between the inner walls in the width direction of the case 10A, and the size of the slider 220 in the front-back direction is equal to the distance between the inner walls in the front-back direction of the case 10A. becomes smaller than the distance. Therefore, when the slider 220 is placed in the space of the case 10A, the side surfaces of the top wall portion 221 and the bottom wall portion 223 of the slider 220 come into contact with the inner wall surface in the width direction of the case 10A and the slider 220 The movement of 220 in the width direction with respect to the case 10A is regulated. In this state, the guide groove 113 of the case 10A and the through hole 225 of the slider 220 are aligned with each other in the front-back direction. That is, the through hole 225 is a hole for inserting the code CD into the slider 220. In addition, when the slider 220 is placed in the space of the case 10A, a gap is created in the front-back direction between the slider 220 and the inner wall surface of the case 10A, and the slider 220 is attached to the case 10A. It can move in the forward and backward directions. In addition, with the slider 220 disposed within the space of the case 10A, the coil spring SP protruding from the recessed portion 231 of the rear wall portion 222 of the slider 220 is positioned at the rear of the case 10A. Pressurizes the inner wall. Accordingly, when the slider 220 is disposed within the space of the case 10A, the slider 220 is positioned on the front side and is pressed forward within the case 10A.

Here, the protrusion 230 of the slider 220 will be described in detail using FIG. 14. As shown in FIG. 14, when assembling the braking device 1000, the slider 220 is placed at the bottom inside the case 10A and relatively moved in the up and down direction so that the two approach. Then, the protrusion 230 provided on the slider 220 is passed through the groove 118 provided inside the case 10A. Meanwhile, in FIG. 14(a), the groove 118 is highlighted to improve visibility. Then, as shown in FIG. 4, the case 10A and the slider 220 are brought closer together until the protrusion 230 reaches the support groove 114. Then, the coil spring (SP) installed on the slider 220 comes into contact with the rear inner wall of the case 10A, and biases the slider 220 forward, so that the protrusion 230 is located ahead of the groove 118. It becomes. Therefore, once the slider 220 is mounted on the case 10A, the protrusion 230 can be prevented from falling from the support groove 114. In addition, the groove 118 serves to pass the protrusion 230 not only when the braking device 1000 is assembled, but also when disassembled. In this case, the slider 220 is moved relatively backward with respect to the case 10A by resisting the biasing force of the coil spring SP, and when the protrusion 230 reaches the position of the groove 118, the slider 220 Simply move to the lower side relative to the case (10A).

With this configuration, it becomes possible to support the slider 220 in a floating state inside the case 10A. Therefore, contact between the slider 220 and other components, such as the carrier 260 with internal teeth, etc. can be prevented, and unnecessary resistance can be reduced or zero. Therefore, it becomes possible to reduce consumption of each member.

1-2-4 <Idle roller (40), knurling (240) and pinion gear (50)>

Next, the idle roller 40, knurling 240, and pinion gear 50 will be described using FIGS. 3 and 15.

The idle roller 40 is composed of a roller portion 42 and a shaft 41. In addition, the idle roller 40 has a shaft 41 parallel to the shaft 31 of the knurling 240, and a roller portion 42 covering the outer peripheral surface of the shaft 41. Accordingly, the rotation axis of the knurling 240 and the rotation axis of the idle roller 40 are parallel to each other. The outer diameter of the roller portion 42 of the idle roller 40 is larger than the outer diameter of the knurling 240. The outer peripheral surface of the roller portion 42 of the idle roller 40 has a higher friction coefficient than the flat metal surface. Additionally, both ends of the shaft center 41 are exposed from the roller portion 42.

One end of the shaft 31 is inserted into the center of the knurling 240. And, a pinion gear 50 is inserted into the other end of the shaft 31. The knurling 240 can be formed of any material, for example, stainless steel.

The idle roller 40 and the knurling 240 are maintained inside the slider 220. Additionally, the pinion gear 50 is maintained outside the slider 220. Here, the positional relationship between the knurling 240, the slider 220, and the pinion gear 50 will be described using FIG. 9. FIG. 9 is a portion of a cross-sectional view passing substantially through the center of the shaft 31 when viewed from the left side of the braking device 1000 according to the present embodiment. As shown in FIG. 9, when assembling the braking device 1000, the bottom wall portion 223 of the slider 220 is sandwiched between the knurling 240 and the pinion gear 50. Additionally, in this embodiment, a step 51 is provided on the pinion gear 50 to reduce the contact area between the pinion gear 50 and the slider 220. Therefore, when the knurling 240 and the pinion gear 50 rotate together through the shaft center 31, the sliding resistance between the pinion gear 50 and the slider 220 can be reduced. Therefore, it becomes possible to make the rotation operation smooth. On the other hand, in order to reduce resistance, in this embodiment, a washer 241 (see FIGS. 2 and 3) is fitted to the shaft center 31 on the lower side of the pinion gear 50.

1-2-5 <Carrier with internal teeth (260) and planetary gear (280)>

Next, the carrier 260 and the planetary gear 280 with internal teeth will be described using FIGS. 2 and 15 . In this embodiment, the carrier 260 with internal teeth has an almost donut shape when viewed from the top. The carrier 260 with internal teeth has a flange 262 that protrudes outward from the cylindrical portion 264 when viewed in plan.

An internal gear 261 meshing with the pinion gear 50 is formed on the inner peripheral surface of the cylindrical portion 264. And, the flange 262 is formed with a support shaft 263 that protrudes downward in the vertical direction. The number of support shafts 263 is not particularly limited, but it is particularly preferable that they are equally spaced. Additionally, in this embodiment, as an example, four support shafts 263 are provided.

In addition, planetary gears 280 are supported on each support shaft 263 so as to be rotatable. The planetary gear 280 meshes with a sun gear 323, which will be described later, and an inner peripheral gear 115 installed inside the case 10A. And, it is possible to revolve around the center of the internal gear 261. Therefore, the rotation of the pinion gear 50 is transmitted to the internal teeth gear 261, so that the carrier 260 with internal teeth rotates, and the support shaft 263 installed on the flange 262 of the carrier 260 with internal teeth rotates accordingly. By rotating the planetary gear 280, which is rotatably supported, it becomes possible to speed up the rotation caused by the pinion gear 50. Additionally, a step 281 is installed on the planetary gear 280. This step makes it possible to avoid contact with other members.

1-2-6 <Sun gear weight holder (320) and weight (340)>

Next, the sun gear weight holder 320 and the weight 340 will be described using FIGS. 2 and 15. The weight 340 is an example of a centrifugal expansion portion that is disposed on the base 70 in the case 10A and at the same time applies centrifugal force radially outward due to rotational input from a braking object. The sun gear weight holder 320 is formed by alternating convex portions 321 and recessed portions 322 toward the outside of the ring-shaped ring portion 324. Here, the iron portion 321 is a member that contacts the side of the weight 340 when the sun gear weight holder 320 rotates. As shown in FIG. 2, a sun gear 323 meshed with a planetary gear 280 is installed on the outer peripheral surface of the ring portion 324 so that its rotation axis is oriented substantially perpendicular to the direction in which the iron portion 321 extends. And, a weight 340 is disposed in each recessed portion 322. In other words, the sun gear weight holder 320 can also be said to be a member that holds the weights 340 within each recessed part 322 with the convex part 321 as a boundary when assembling the braking device 1000. Meanwhile, the number of weights 340 is arbitrary, but it is preferable that they are equally spaced from the viewpoint of balance during rotation. Additionally, in this embodiment, eight weights 340 are used as an example. Accordingly, eight convex portions 321 and eight recessed portions 322 are each installed. That is, the recesses 322 are arranged at equal intervals and at the same distance from the rotation center of the sun gear weight holder 320.

In this embodiment, each weight 340 is provided with a protrusion 341 on the base 70 side. Accordingly, a step is provided on at least a portion of the contact surface between the weight 340 and the base 70. Therefore, it becomes possible to reduce the resistance when coming into contact with the base 70. The number of projections 341 is arbitrary, but in this embodiment, four projections 341 are provided as an example.

When rotating due to the pinion gear 50, the weight 340 moves away from the center of the internal gear 261 by centrifugal force and comes into contact with the inner circumferential wall of the case 10A, thereby providing resistance to rotation as a centrifugal brake. It is given. Therefore, it is possible to perform an action equivalent to the resistance imparting portion of the first embodiment by the inner peripheral wall of the case 10A, the weight holder 320 with the sun gear, and the weight 340.

Meanwhile, when assembling the braking device 1000, the carrier 260 with internal teeth and the weight holder 320 with sun gear can be assembled through the plate 300. Specifically, the cylindrical portion 264 of the carrier 260 with internal teeth is assembled to be inserted into the ring portion 324 of the weight holder 320 with a sun gear. Accordingly, the diameter of the cylindrical portion 264 is designed to be slightly smaller than the diameter of the ring portion 324.

Here, the plate 300 has the function of preventing inclination of the planetary gear 280 and at the same time preventing interference between the planetary gear 280 and the weight 340. Meanwhile, the weight 340 is preferably formed as thin as possible in order to reduce the overall thickness of the braking device 1000. In addition, the plate 300 is preferably made of metal in order to be thin, but if technically possible, the plate 300 may be made of resin. In this case, it may be formed integrally with the sun gear 323.

1-2-7 <Base (70)>

Next, the base 70 will be described using FIGS. 2, 3, 5(b), and 15. As shown in FIGS. 2 and 3, a cylindrical portion 708 having a larger volume than the surrounding area and a concave lower side is provided almost in the center of the base 70. And, as shown in FIGS. 2 and 5(b), a first base groove 706, a first guide wall 706A, a second base groove 707, and a second guide are formed on the surface of the cylindrical portion 708. Wall 707A is installed.

The first base groove 706 and the first guide wall 706A correspond to the first top wall groove 16 and the first guide wall 16A provided in the case 10A, respectively. Then, the lower end of the shaft 31 is inserted and passes through the first base groove 706 and comes into contact with the first guide wall 706A formed at the edge. Likewise, the second base groove 707 and the second guide wall 707A correspond to the second top wall groove 17 and the second guide wall 17A provided in the case 10A, respectively. Then, the lower end of the shaft 41 is inserted and passes through the second base groove 707 and comes into contact with the second guide wall 707A formed at the edge.

On the other hand, although the cylindrical part 708 is not essential, by making the lower side concave by installing the cylindrical part 708, the lower ends of the axial center 31 and the axial center 41 form the placement surface on which the braking device 1000 is placed. It prevents contact and makes it possible to properly insert and pass through the lower ends of the shaft center 31 and the shaft center 41.

Additionally, the base 70 is provided with two first engaging plate portions 701A at both ends of the left and right sides, respectively. Then, two second engaging plate portions 701B are installed at both ends of the front side, and one second engaging plate portion 701B is provided almost at the center of the rear side. The first engaging plate portion 701A engages with the first engaging groove 111A provided in the case 10A. Additionally, the second engaging plate portion 701B engages with the second engaging groove 111B provided in the case 10A. Accordingly, the case 10A and the base 70 are engaged to form a housing.

In addition, as shown in Fig. 3, Fig. 5(b), Fig. 15, etc., on the outside of the bottom surface of the base 70, there is an installation cylinder 702 used when placing the braking device 1000 in the head box of the shielding device. It is installed. For example, it becomes possible to stably arrange the braking device 1000 within the head box by inserting the installation cylinder 702 into a member such as an axle installed within the head box.

1-3 <Assembly configuration>

Next, the assembled state of each of these members will be described using FIGS. 4 to 8. Figure 4 is an assembly diagram of a braking device 1000 constructed by combining these members. As shown in FIG. 4, the exterior of the braking device 1000 consists of a housing to which the case 10A and the base 70 are connected, and an alignment member 200 arranged to cover the case 10A from above. This assembly is performed with the central axes of each member overlapping in the vertical direction, as shown in Figures 2 and 3. Specifically, a carrier 260 with internal teeth and a weight holder 320 with a sun gear holding the weight 340 can be assembled through the plate 300. At this time, the planet gear 280 installed on the carrier 260 with internal teeth and the sun gear 323 installed on the weight holder 320 with sun gear mesh with each other.

Then, the shaft 31 is slid in the first top wall groove 226 and the first bottom wall groove 228 of the slider 220 while moving in the horizontal direction. At this time, the knurling 240 is located inside the slider 220, and the pinion gear 50 is located outside the slider 220. Additionally, the shaft 41 is slid along the second top wall groove 227 and the second bottom wall groove 229 while moving in the horizontal direction. At this time, the roller unit 42 is located inside the slider 220. Then, the slider 220 and the carrier 260 with internal teeth are moved relative to each other so that the internal gear 261 and the pinion gear 50 installed on the carrier 260 with internal teeth mesh with each other.

Thereafter, the base 70 is placed on the lower side of this member, and as shown in FIG. 14, the projection 230 of the slider 220 passes through the groove 118 of the case 10A to form the case 10A. Cover from above. At this time, the coil spring (SP) installed on the slider 220 is in contact with the inner peripheral wall of the case 10A, and the slider 220 is biased forward to ensure that the protrusion 230 does not fall out of the support groove 114. Confirm. Then, the first engaging groove 111A and the first engaging groove 111B installed on the case 10A and the first engaging plate portion 701A and the second engaging plate portion 701B installed on the base 70 are engaged with each other. Fix the case (10A) and base (70).

Finally, the alignment member 200 is covered from above the housing comprised of the case 10A and the base 70. Then, the claw portion 209 provided on the alignment member 200 is engaged with the engaging hole 19 provided on the case 10A to fix the alignment member 200 and the case 10A.

The braking device 1000 assembled in this way is shown in Figure 4. Then, when the assembly of the braking device 1000 is completed, the first cord CD is disposed outside the front wall 205 of the alignment member 200 and above the first front groove 201. Then, the second code (CD) is inserted into the first front groove 201 through the first front code insertion portion 201A of the alignment member 200. Then, the third cord (CD) is inserted into the second front groove 202 through the second front cord insertion portion 202A.

Then, this code (CD) passes through the guide groove 113 provided before and after the case 10A and the through hole 225 provided before and after the slider 220.

And, among these cords CD, the first cord CD is passed so as to be located outside the rear wall portion 206 of the alignment member 200 and above the first rear groove 203. Then, the second cord (CD) is passed out from the first rear groove 203 through the first rear cord insertion portion 203A installed on the rear wall 206 of the alignment member 200. Then, the third cord (CD) is passed out from the second rear groove 204 through the second rear cord insertion portion 204A. Accordingly, the state shown in FIGS. 4(a) and 4(b) is achieved.

FIG. 4(c) is a left side view of the braking device 1000, that is, a side view viewed from the direction of arrow X in FIG. 4(a). As shown in Fig. 4(c), when the braking device 1000 is viewed from the side, the case 10A, the alignment member 200, and the base 70 are visible from above. Additionally, it can be seen that the protrusion 230 is supported by the support groove 114.

As shown in FIG. 5(a), the braking device 1000 can be viewed in that order from the center when viewed from the plane: the case 10A, the alignment member 200, and a portion of the base 70. Here, as shown in FIGS. 4(a), (b) and 5(a), the upper end of the shaft 31 extends from the first ceiling groove 226 provided on the slider 220 to the second groove 226 provided on the case 10A. 1 It is inserted and passed through the ceiling wall groove (16) and is exposed to the outside of the case (10A). Likewise, the upper end of the shaft 41 is exposed to the outside of the case 10A by inserting and passing through the second ceiling groove 227 installed on the slider 220 through the second ceiling groove 17 installed on the case 10A. there is.

In addition, the first guide wall 16A installed on the edge of the first ceiling wall groove 16 is in contact with the axis 31, and the second guide wall 17A installed on the edge of the second ceiling wall groove 17 is in contact with the axis 41. ) is in contact with.

In addition, as shown in FIG. 5(b), the base 70 is inserted into the lower end of the shaft 31 passed through the first base groove 706 and the second base groove 707 when viewed from the bottom. The lower end of the passed shaft 41 can be recognized. On the other hand, on the surface where the installation cylinder 702 is installed, the cylindrical portion 708 may be covered with a surface so that the lower ends of the shaft 31 and the shaft 41 are covered from the outside.

1-3-2 <Internal structure in assembled state>

Next, the internal structure in the assembled state will be described using Figures 6 to 8. FIG. 6 is a perspective view of the alignment member 200 and the case 10A removed from the state of FIG. 4 . As shown in FIG. 6, the shaft 31 and the shaft 41 protrude above the slider 220. Additionally, the movement of the shaft 31 in the width direction of the slider 220 is restricted within the first ceiling wall groove 226. Likewise, the movement of the shaft 41 in the width direction of the slider 220 is restricted within the second ceiling wall groove 227. Meanwhile, a code (CD), not shown, is vertically aligned in the through hole 225 of the slider 220 and is inserted and passed in the front-back direction of the slider 220.

FIG. 7 is a perspective view in a state in which the slider 220 is further removed from the state in FIG. 6. A code (CD), not shown, is inserted before and after the braking device 1000 in a state confined to the knurling 240 and the roller portion 42. Additionally, the pinion gear 50 and the internal gear 261 are meshed with each other. Therefore, when tension is applied to the cord CD, a frictional force is generated between the cord CD and the knurling 240, and as a result, when the pinion gear 50 rotates as one with the knurling 240, the pinion gear 50 rotates. The rotation of (50) is transmitted to the internal gear (261). As a result, the internally toothed gear 261 rotates, and the support shaft 263 provided on the flange 262 along with the internally toothed carrier 260 also rotates. Accordingly, the planetary gear 280, which is rotatably supported on the support shaft 263, rotates and begins to revolve.

Figure 8 is a perspective view of the state in which the carrier 260 with internal teeth is further removed from the state in Figure 7. As shown in FIG. 8, the planet gear 280 and the sun gear 323 are meshed with each other. Accordingly, the rotation of the planetary gear 280 is transmitted to the sun gear 323 and the sun gear weight holder 320 begins to rotate. As a result, as shown in FIG. 15, the weight 340 held in the recessed portion 322 of the sun gear weight holder 320 begins to rotate. Then, when the rotation speed exceeds a certain value, the weight 340 comes into contact with the inner wall of the case 10A due to centrifugal force. Accordingly, resistance to rotation of the knurling 240 is generated.

Next, the relative positions between each member in the assembled state will be described in more detail using FIGS. 16 and 17. Figure 16 is a cross-sectional view taken along line A-A in Figure 4(c). As shown in FIG. 16, the pinion gear 50 centered on the shaft 31 and the internal tooth gear 261 installed on the carrier 260 with internal teeth are meshed with each other. In addition, the rotation of the internally toothed gear 261 is configured to be transmitted to the planetary gear 280 through the support shaft 263 of the carrier 260 with internal teeth. And, the planetary gear 280 meshes with the sun gear 323 installed on the weight holder 320 equipped with a sun gear and the inner peripheral gear 115 installed inside the case 10A. Therefore, as rotation due to the pinion gear 50 is applied, the planet gear 280 moves within the space formed between the sun gear 323 and the inner gear 115 with the center of the internal gear 261 as the center. It becomes possible to orbit.

Figure 17 is a cross-sectional view taken along line B-B of Figure 5(a). As shown in Fig. 17, in this embodiment, the cross-sectional view of the line B-B is substantially symmetrical with the installation cylinder 702 as the center. And the shaft 31 and the shaft 41 protrude from the upper end of the case 10A and the lower end of the base 70. On the other hand, in this embodiment, the upper ends of the first guide wall 16A and the second guide wall 17A are at approximately the same height as the upper ends of the shaft center 31 and the shaft center 41, respectively.

And, the knurling 240 and the roller part 42 are located inside the slider 220. In addition, the pinion gear 50 is located outside the slider 220 with the knurling 240 positioned between the slider 220 and the slider 220 . Additionally, the pinion gear 50 and the internal gear 261 are meshed with each other.

Then, the case 10A is covered with an alignment member 200 from the upper side to the jaw portion 13. Additionally, case 10A is engaged with base 70 at its lower end. Additionally, a weight 340 is maintained at the top of the base 70. Here, in this embodiment, since the weights 340 are removable, it is possible to adjust the necessary braking force depending on the number or type of the weights 340. That is, if a large braking force is required, the number of weights 340 can be increased or another weight with a higher density can be maintained in the weight holder 320 equipped with a sun gear. On the other hand, if a small braking force is sufficient, the number of weights 340 can be reduced. Meanwhile, from the viewpoint of stability during rotation, the weight 340 is preferably arranged symmetrically with respect to the surface on which it is held in the weight holder 320 equipped with a sun gear. Meanwhile, in this embodiment, the protrusion 341 provided on the weight 340 and the bottom surface of the base 70 come into contact, thereby reducing the resistance between the weight 340 and the base 70 during rotation.

1-4 <Action>

Next, the operation of the braking device 1000 of the second embodiment will be described using FIG. 18. Figure 18(a) shows a state in which no tension is applied to the cord (CD) (normal state), and Figure 18(b) shows a state in which tension is applied to the cord (CD), forming the knurling 240 and the roller portion 42. In the state where the raw cord (CD) is constricted (constricted state), FIG. 18(c) is a diagram summarizing the rotation direction of each member when the state changes from FIG. 18(a) to FIG. 18(b). Meanwhile, Figures 18(a) and (b) are both cross-sectional views taken along line A-A of Figure 4(c), similar to Figure 16. Here, for convenient explanation, the outer periphery of the roller portion 42, not shown in this cross-sectional view, is shown overlapping around the shaft center 41, and the outer periphery of the knurling 240 is shown overlapping around the shaft center 31. Meanwhile, the outer circumference of the knurling 240 is not strictly circular, but is shown to approximate a circular shape for simplicity of explanation.

As shown in Fig. 18(a), in the normal state, as described above, the coil spring SP comes into contact with the rear inner wall of the case 10A and presses the slider 220 forward. Accordingly, the slider 220 is located in the front of the case 10A. Therefore, the shaft center 31 whose position is regulated by the first top wall groove 226 and the first bottom wall groove 228 of the slider 220, the second top wall groove 227, and the second bottom wall groove 229 The axis 41, whose position is regulated by , moves forward together with the slider 220. Additionally, the distance between the first ceiling groove 16 and the second ceiling groove 17 provided in the case 10A held at the top of the slider 220 becomes smaller as it faces forward. Similarly, the distance between the first base groove 706 and the second base groove 707 provided on the base 70 becomes smaller as it faces forward. Accordingly, the distance between the roller portion 42 rotatably supported on the shaft 41 and the knurling 240 rotatably supported on the shaft 31 also becomes small. That is, the first ceiling groove 16 and the first base groove 706 are regulation grooves that fit so that the axis 31 of the knurling 240 can move and regulate the knurling 240 from moving not according to the groove. It functions as Likewise, the second ceiling groove 17 and the second base groove 707 fit so that the shaft center 41 of the roller portion 42 is movable and prevent the roller portion 42 from moving in accordance with the groove. It functions as a regulatory home. In addition, since the first ceiling groove 16 and the first base groove 706 are formed on a concentric circle in plan view with the center point of the inner peripheral surface of the carrier 260 with internal teeth, the axis center 31 extends within each groove. Even if it moves, the pinion gear 50 can continue to mesh with the internal tooth gear 261 installed on the carrier 260 with internal teeth.

In this way, when the distance between the knurling 240 and the roller part 42 decreases, the knurling 240 is pressed against the roller part 42, and the code CD is clamped by the knurling 240 and the roller part 42. . That is, in this embodiment, the coil spring SP also functions as a biasing member that always biases the knurling 240 so that the knurling 240 is pressed against the roller portion 42.

And, in the braking device 1000 in a steady state, tension is applied to the cord CD in the direction of arrow D1 (forward). Then, the knurling 240 rotates counterclockwise and the roller portion 42 rotates clockwise due to the friction force generated between the code CD. And, due to the rotation of the knurling 240, the pinion gear 50, which shares the same axis center 31 and is fixed, also rotates (rotates) in the same direction (counterclockwise) as the knurling 240. In this case, as shown in FIG. 18(b), the shaft center 31 and the shaft center 41 move forward in plan view and approach each other in the left and right directions, so that the knurling 240 and the roller portion 42 The pinching force of the code (CD) becomes stronger, and the knurling 240 rotates reliably as the code (CD) moves. Then, since the pinion gear 50 is meshed with the internal gear 261, the internal gear 261 rotates (rotates) counterclockwise due to the force applied from the teeth of the pinion gear 50. do. Therefore, since the carrier 260 with internal teeth along with the internal teeth 261 also rotates (rotates) counterclockwise, the planetary gear 280 installed on the carrier 260 with internal teeth also rotates counterclockwise ( orbit). Here, since the planetary gear 280 is meshed with the sun gear 323 and the inner peripheral gear 115 fixed by the case 10A, it rotates in a direction opposite to the revolution direction (clockwise) and rotates in a counterclockwise direction. It becomes orbital. Accordingly, the sun gear 323 meshing with the planetary gear 280 inside the planetary gear 280 rotates (rotates) in a direction opposite to the rotation of the planetary gear 280 (counterclockwise). At this time, the rotation of the sun gear 323 is accelerated by the planetary gear 280. Accordingly, the weight 340 held in the weight holder 320 with the sun gear rotating together with the sun gear 323 also starts rotating. Meanwhile, as already mentioned, the inner peripheral gear 115 meshing with the planetary gear 280 on the outside of the planetary gear 280 rotates the planetary gear 280 because the case 10A and the base 70 are fixed. It does not rotate at all.

And, as shown in FIG. 18(b), when the knurling 240 and the roller portion 42 approach the limit (constricted state), the rotation of the knurling 240 continues, but the internal gear 261 of the knurling 240 ) movement stops. At this time, rotation of other members due to the rotation of the knurling 240 continues. Then, the weight 340 comes into contact with the inner circumferential wall of the case 10A due to centrifugal force, thereby generating resistance to rotation. That is, as the moving speed of the cord CD increases, the rotational speed increases, and thus the centrifugal force increases. And, as the centrifugal force increases, the weight 340 comes into strong contact with the inner peripheral wall of the case 10A, thereby increasing the resistance. Accordingly, the moving speed of the cord CD (the falling speed of the solar radiation shielding member) can be suppressed. Here, when the tension applied to the cord (CD) is almost constant (for example, when the solar radiation shielding member suspended and supported so as to be able to be raised and lowered on the cord (CD) on the front side of the braking device 1000 freely falls) , the tension applied to the cord (CD) and the resistance due to the weight 340 and the inner circumferential wall of the case 10A are balanced, so that the moving speed of the cord (CD) is almost constant. Accordingly, the braking device 1000 functions as a rotation damper for the movement of the cord CD and makes it possible to slowly lower the solar radiation shielding member.

FIG. 18(c) summarizes the rotational direction of each member (including the forward-backward direction and fastening direction in plan view for the pinion gear 50) regarding the change in the constricted state from the normal state described above to the constricted state. am.

On the other hand, when tension is applied to the cord (CD) in the direction opposite to arrow D1 (rearward), the knurling 240 and the roller portion 42 rotate in the opposite direction. As a result, the shaft center 31 and the shaft center 41 move so as to be spaced apart from each other along the first ceiling groove 16 and the second ceiling groove 17. Then, the clamping force of the knurling 240 on the cord (CD) is weakened, making it possible to pull the cord (CD) with a weak force. Therefore, when installing the braking device 1000 in the head box, in Figure 18, the direction in which tension is applied to the cord (CD) forward is the direction in which the solar radiation shielding member descends, and tension is applied to the cord (CD) rearward. It is desirable to set the direction in which the solar radiation shielding member rises.

Next, using FIG. 19, the movement of the slider 220 when the state changes between the normal state and the constricted state will be explained. FIG. 19(a) corresponds to FIG. 18(a), and FIG. 19(b) corresponds to FIG. 18(b).

만큼 이동하면 슬라이더(220)도 전방으로

만큼 이동한다. When changing from the normal state in FIG. 19(a) to the constricted state in FIG. 19(b), the shaft center 41, the roller portion 42, the shaft center 31, and the knurling 240 are affected by the frictional force with the cord CD. Move forward in the drawing. At this time, the shaft center 41 comes into contact with the second ceiling groove 227 and the second bottom groove 229, so that the second ceiling groove 227 and the second bottom groove move forward as the shaft center 41 moves forward. A force is applied to the front against the wall groove 229. In addition, since the shaft center 31 is in contact with the first top wall groove 226 and the first bottom wall groove 228, as the shaft center 31 moves forward, the first top wall groove 226 and the first bottom wall groove 228 A force is applied forward to the low wall groove 228. Therefore, the axes (31, 41) move forward.

If you move as far as you can, the slider (220) also moves forward.

Move as much as

Next, using Figure 20, a predetermined constriction position in the initial state (before wear) of the pair of constriction members (roller portion 42 and knurling 240) and the constriction position after wear will be explained. . Meanwhile, in this embodiment, the roller part 42 and the knurling 240 are rotating bodies that rotate around the axis 41 and the axis 31, respectively.

As shown in FIG. 20, in the initial state of the knurling 240, that is, in a state before the diameter is reduced due to wear, the knurling 240 and the roller portion 42 are moved from the release position as the cord CD moves. It moves forward according to the first ceiling groove (16) and the second ceiling groove (17). That is, at least one of the pair of constrictions is configured to move along a predetermined movement trajectory (two arrows in the figure). Here, this movement trajectory is according to the regulation grooves (the first ceiling groove 16 and the first base groove 706, and the second ceiling groove 17 and the second base groove 707 (see FIG. 5)) It can be said to be the trajectory of movement of the constriction. Accordingly, the knurling 240 and the roller portion 42 narrow the cord CD. At this time, the positions of the knurling 240 and the roller unit 42 are at a predetermined narrowing position.

At this time, the movement trajectory extends beyond the predetermined constriction position. That is, the regulatory groove extends beyond this constriction location. Additionally, the movement trajectory extends in the direction toward the code CD. Additionally, the movement trajectories of the knurling 240 and the roller portion 42 are configured such that their extension lines intersect each other. Additionally, this constricted position is a position spaced apart from the end of the approach direction side (front side in FIG. 20) to the regulation groove cord CD. In addition, when a part of the knurling 240 or the roller part 42, especially the contact part with the cord CD, is chipped away due to wear, and the diameter of the knurling 240 or the roller part 42 becomes small, the regulation groove is The shaft center 31 and the shaft center 41 are maintained in the regulating groove within a range exceeding the narrowing position (the narrowing position in the initial state), so that the knurling 240 and the roller portion 42 narrow the cord CD. do. As shown in Fig. 20, the constriction position after wear becomes a position spaced forward by d in the figure from the predetermined constriction position.

In this way, as the movement trace (regulating groove) extends beyond the narrowed position of the knurling 240 or the roller part 42 in its initial state, the diameter of the knurling 240 or the roller part 42 becomes small due to wear. Even in this case, the cord (CD) can be properly stenotic.

Additionally, the same effect is achieved even when the cord diameter becomes smaller due to cord wear.

2. Second embodiment

Next, the motion conversion unit according to the second embodiment of the present invention will be described using FIGS. 21 to 23. As shown in FIG. 21, in the second embodiment, the knurling 240 and the roller portion 42 are connected via the shaft center 31 and the shaft center 41, respectively. Here, this connection method is arbitrary and, for example, a pair of plates 800 may be used as shown in Fig. 21(a). Here, in the second embodiment, the plate 800 is substantially spherical, and for example, a metal plate 800 can be used. In addition, a through hole 801 is installed in a portion corresponding to the shaft center 31 and the shaft center 41 of the plate 800, and the knurling 240 is formed by inserting the shaft center 31 and the shaft center 41 into the through hole 801. ) and the roller unit 42 can be connected. On the other hand, when using the string-shaped member 900, as shown in FIG. 22, the knurling 240 and the roller portion 42 rotate in opposite directions when the cord CD is moved, so the string-shaped member 900 It is configured to cross. Here, FIG. 22 is a schematic diagram of the state in which the member in FIG. 21(b) narrows the cord CD, as seen from the arrow Z direction.

Additionally, as shown in FIG. 21(b), the knurling 240 and the roller portion 42 may be connected using a string-shaped member 900 instead of the plate 800.

And, as shown in FIG. 23, this member is installed inside the case 10B so as to sandwich the cord CD between the knurling 240 and the roller portion 42. Here, in FIG. 23, a method using the string-shaped member 900 in FIG. 21(b) is explained to improve visibility. Additionally, it is assumed that gravity g acts in the direction indicated by arrow g in FIG. 23. For convenience of explanation, the direction of arrow g is assumed to be downward, and the direction opposite to arrow g is assumed to be upward.

Additionally, a first side wall hole 119A is provided in the case 10B at a position corresponding to the shaft center 31. The first side wall hole 119A has an oval shape that slopes forward. Additionally, this shape is not particularly limited and can be designed appropriately. Here, in the second embodiment, the first side wall hole 119A corresponds to a regulating groove and extends beyond the constriction position in the initial state of the first constriction member (knurled 240). In addition, in Figure 23(b), a predetermined constriction position is indicated by a dotted circle, and the following description explains the operation after the constriction body is worn. Additionally, the two arrows in Figure 23(b) indicate the movement trajectory of the constriction body.

The shaft 31 is movable along the first side wall hole 119A. Here, the knurling 240 is a roller that is installed at a position that can contact the code (CD) and can move in the vertical direction. Here, the first side wall hole (119A) has an inner peripheral surface formed by a constriction guide slope (119a), a release guide slope (119b), a constriction side regulating surface (119c), and a release side regulating surface (119d).

Additionally, a cord CD is inserted inside the case 10B to face the knurling 240 and a support 92 is fixed at a position ahead of the knurled ring 240.

First, from the state shown in FIG. 23(a), when tension is applied to the cord CD in the direction of arrow D2, the knurling 240 is moved along the first side wall in the direction of arrow D3 due to frictional force generated between the cord CD and the cord CD. It moves downward according to the ball 119A. At this time, the movement trajectory of the knurling 240 is along the first side wall hole 119A. Additionally, as shown in Fig. 23(b), the movement trajectory extends beyond the predetermined constriction position.

As shown in Fig. 23(b), this position is taken as the first position, which is a position below the moving direction with a vertical component. In this state, since the vertical distance between the knurling 240 and the strut 92 is small, the cord CD is bent and narrowed. That is, the strut 92 functions as a second constriction member positioned between the knurled 240 and the cord CD. Additionally, the roller unit 42 functions as an auxiliary roller that moves in conjunction with the knurling 240.

Here, in the constricted state, when the shaft 31 reaches the front limit of the movable range, the knurling 240, which was moving substantially in parallel, begins to rotate (clockwise in the drawing). Additionally, the rotation of the shaft 31 may be output to the resistance imparting portion RA, which generates a resistance force in accordance with the movement of the cord CD. At this time, when the cord (CD) moves forward, the rotation is transmitted to the resistance imparting part (RA), but when the cord (CD) moves backward, the knurling 240 is provided so that the rotation is not transmitted to the resistance imparting part (RA). Alternatively, a one-way clutch may be installed between the knurling 240 and the resistance providing portion (RA). Here, the resistance providing portion RA may be installed inside or outside the case 10B, or may be installed inside the knurled 240.

On the other hand, when tension is applied to the cord CD in the direction opposite to arrow D2, an operation in the opposite direction to the above operation occurs, so that the distance in the vertical direction between the knurling 240 and the strut 92 is separated, and the cord The constricting force on (CD) becomes weaker.

And, as shown in FIG. 23(a), the shaft center 31 resists gravity g and is at a position above the movable direction (inclined direction in FIG. 23) with the vertical component of the first side wall hole 119A. Move to the second position. This state is called a free movement state. In the free movement state, the cord CD is released in a non-flexed state. Additionally, free movement of the code (CD) can be permitted.

On the other hand, a non-rotating support can also be used instead of the shaft 31 and the knurling 240, and the shaft 41 and the roller portion 42.

Likewise, in the second embodiment, the movement trace (regulating groove) extends beyond the constricted position in the initial state of the knurling 240 or the roller part 42, causing the knurling 240 or the roller part 42 to wear out. Even when the diameter of (42) is reduced, the cord (CD) can be properly narrowed.

3. Third embodiment

Next, another motion conversion unit according to the third embodiment of the present invention will be described using FIG. 24. As shown in FIG. 24 , an accommodation space 93 slightly larger than the diameter of the knurling 240 is formed in the case 10C according to the third embodiment. Here, the accommodation space 93 has a shape that combines an arc shape and a transverse straight shape when viewed in cross section. Accordingly, the knurling 240 can move freely within the receiving space 93. Additionally, a constriction guide slope 93a and a release-side regulation surface 93d are formed in the accommodation space 93.

Then, the shaft 31, the knurling 240, the strut 92, the two output shafts 95, and the endless belt 94 are disposed inside the case 10C. Additionally, a first side wall hole 119A is provided in the case 10C at a position corresponding to the shaft center 31. Here, in the third embodiment, the first side wall hole 119A corresponds to a regulating groove and extends beyond the constriction position in the initial state of the first constriction member (knurled 240). Additionally, in Fig. 24(b), a predetermined constriction position is indicated by a dotted circle, and the following description will explain the operation after the constrictor is worn. In addition, the two arrows in FIG. 24(b) indicate the movement trajectory of the constriction body, where the knurling 240 is installed to slightly contact the cord CD in a free movement state.

The knurling 240 is installed to sandwich the code CD between the roller portion 42 and the roller portion 42. Then, an endless belt 94 is applied to the two output shafts 95. The endless belt 94 is configured so that a resistance force is applied by the rotation of the knurling 240, and the endless belt 94 can rotate. Alternatively, if possible, the surface of the endless belt 94 may be shaped to engage with the surfaces of the knurling 240 and the output shaft 95. In addition, the output shaft 95 is configured to output its rotation to a resistance imparting unit that generates a resistance force according to the movement of the cord CD. The output shaft 95 and the endless belt 94 are configured so that the endless belt 94 is substantially aligned with the rectilinear portion of the receiving space 93.

First, from the state shown in FIG. 24(a), when tension is applied to the cord CD in the direction of arrow D4, the knurling 240 rotates in the direction of arrow D5 due to the friction force generated between the cord CD and the cord CD. At the same time, it moves across the rectilinear portion of the accommodation space 93 in a direction approaching the endless belt 94 (first position). At this time, the movement trajectory of the knurling 240 is along the first side wall hole 119A. Additionally, as shown in Fig. 24(b), the movement trajectory extends beyond the predetermined constriction position. As shown in Fig. 24(b), in this state, the vertical distance between the knurling 240 and the strut 92 is small, so the cord CD is bent and constricted. That is, the strut 92 functions as a second constriction member positioned between the knurled 240 and the cord CD.

Meanwhile, in the constricted state, as in the third embodiment, the rotation of the output shaft 95 may be output to the resistance providing portion RA. That is, the friction force acting between the knurling 240 and the endless belt 94 causes the endless belt 94 to rotate in the direction opposite to arrow D5 (counterclockwise) with respect to the output shaft 95. Accordingly, the output shaft 95 also rotates (rotates) in the same direction (counterclockwise) as the endless belt 94. This rotation is output to the resistance granting unit (RA). In this configuration, one of the output shafts 95 performs the same function (transmitting rotation to the resistance providing portion RA) as the shaft center 31 in the third embodiment. At this time, when the cord (CD) moves forward, the rotation is transmitted to the resistance imparting part (RA), but when the cord (CD) moves backward, the knurling 240 is provided so that the rotation is not transmitted to the resistance imparting part (RA). A one-way clutch may be installed between and the resistance providing portion (RA).

On the other hand, when tension is applied to the cord (CD) in the direction opposite to arrow D4, an operation in the opposite direction to the above operation occurs, so that the distance in the vertical direction between the knurling 240 and the strut 92 is separated, and the cord The constricting force for (CD) becomes weaker.

And, as shown in FIG. 24(a), the shaft center 31 resists gravity g and moves to the second position, which is a position away from the endless belt. This state is called a free movement state. In the free movement state, the cord CD is released in a non-flexed state. Additionally, free movement of the code (CD) can be permitted.

Meanwhile, the shaft and roller portion may be used instead of the support 92.

Likewise, in the third embodiment, the movement trace (regulating groove) extends beyond the constricted position in the initial state of the knurling 240, so that even when the diameter of the knurling 240 decreases due to wear, the code ( CD) can be appropriately stenotic.

4. Fourth embodiment

Next, the motion conversion unit according to the fourth embodiment of the present invention will be described using FIG. 25. The fourth embodiment is a modified version of the second embodiment. Therefore, only the changes from the second embodiment will be described below. As shown in FIG. 23, in the second embodiment, the shaft center 31 and the knurled ring 240 are lowered downward using the gravity g, and it can be said that the gravity g is used as a biasing member. In contrast, in the fourth embodiment, as shown in FIG. 25, the shaft center 31 is connected to the fixed shaft 160 by a connecting member 170. Here, the connecting member 170 may use, for example, the plate 800 of FIG. 21. Then, a spring 150 is mounted on the connecting member 170. Accordingly, the connecting member 170 is biased in the direction of arrow g with the fixed shaft 160 as the center, thereby biasing the shaft center 31 and the knurling 240 in the direction of arrow g.

Also, in the fourth embodiment, as in the third embodiment, the first side wall hole 119A corresponds to a regulating groove and extends beyond the constriction position in the initial state of the first constriction member (knurled 240). . Meanwhile, in Fig. 25(b), a predetermined constriction position is indicated by a dotted circle, and the following description explains the operation after the constrictor is worn. Additionally, the two arrows in Figure 25(b) indicate the movement trajectory of the constriction body.

From the free movement state shown in FIG. 25(a), when tension is applied to the cord CD in the direction of arrow D6, the shaft center 31 and the knurling 240 also move in the direction of arrow D6 due to the frictional force generated between the cord CD. Go to At this time, the connecting member 170 rotates clockwise around the fixed shaft 160, so that the shaft center 31 and the knurled ring 240 move in the direction of arrow g. Accordingly, the constriction state shown in Figure 25(b) is reached. At this time, the movement trajectory of the knurling 240 is along the first side wall hole 119A. Additionally, as shown in Figure 25(b), the movement trajectory extends beyond the predetermined constriction position.

On the other hand, when tension is applied to the cord CD in the direction opposite to that of arrow D6, it transitions from the constricted state shown in Fig. 25(b) to the free movement state shown in Fig. 25(a).

That is, in the device using the member according to the fourth embodiment, when the knurling 240 is located in the second position, the friction force acting between the knurling 240 and the cord CD is such that the knurling 240 is positioned in the first position. The knurling 240 is configured to move so as to be smaller than the friction force acting between the knurling 240 and the cord CD when positioned in .

In addition, when the rotation of the shaft 31 is output to the resistance imparting unit RA that generates a resistance force according to the movement of the cord CD, the device using the member according to the fourth embodiment has the knurling 240. When positioned at the 1st position, the rotation of the knurling 240 resulting from the movement of the code CD is output to the resistance imparting unit RA, and when the knurled 240 is positioned at the 2nd position, the movement of the code CD It is configured not to output the rotation of the knurling 240 resulting from to the resistance imparting unit RA.

<Modification of the fourth embodiment>

Next, a modification of the fourth embodiment will be described using FIG. 26. As shown in Fig. 26, a pair of constriction members is formed by the first constriction member (knurled 240) and the second constriction member (constriction plane 132s). Case 10B includes knurling 240. That is, the case 10B contains at least one of the pair of constricting members. Here, the dotted line CB in the drawing indicates the bottom of the case 10B. Additionally, case 10B has a first side wall hole 119A.

The constriction plane 132s allows movement of the code CD in the free movement state and constricts the code CD together with the knurl 240 in the constriction state. Additionally, the narrowing plane 132s is a fixed plane before and after the movement of the knurling 240.

In the modification of the fourth embodiment, as in the fourth embodiment, the first side wall hole 119A corresponds to a regulating groove and extends beyond the constriction position in the initial state of the first constriction member (knurled 240). It is extended. Meanwhile, in Fig. 26(b), a predetermined constriction position is indicated by a dotted circle, and the following description explains the operation after the constriction body is worn. Additionally, the two arrows in Fig. 26(b) indicate the movement trajectory of the knurling 240 (axial center 31).

From the free movement state shown in FIG. 26(a), when tension is applied to the cord CD in the direction of arrow D7, the shaft center 31 and the knurling 240 also move according to arrow D7 due to the frictional force generated between the cord CD and the cord CD. move in the direction At this time, the connecting member 170 rotates clockwise around the fixed shaft 160, so that the shaft center 31 and the knurling 240 move in the direction of arrow g. Therefore, it transitions to the constricted state shown in Fig. 26(b). At this time, the movement trajectory of the knurling 240 is along the first side wall hole 119A. Additionally, as shown in Fig. 26(b), the movement trajectory extends beyond the predetermined constriction position.

On the other hand, when tension is applied to the cord CD in the direction opposite to arrow D7, it transitions from the constricted state shown in Fig. 26(b) to the free movement state shown in Fig. 26(a).

That is, in the device using the member according to the modified example of the fourth embodiment, when the knurling 240 is located in the second position, the friction force acting between the knurling 240 and the cord CD is determined by the knurling 240. The knurling 240 is configured to move so as to be smaller than the friction force acting between the knurling 240 and the cord CD when positioned at position 1.

Here, the narrowing plane 132s may be the bottom surface 132 of the head box (HB) or the bottom surface of a member different from the head box (HB).

Next, using FIG. 27, it will be explained in more detail how the cord CD can be properly narrowed even when the diameter of the first pinching member (knurled 240) becomes smaller due to wear. Here, Figure 27 corresponds to the constricted state shown in Figure 26(b).

As indicated by the dotted line in the drawing, the knurling 240 before wear narrows the cord CD at a predetermined pinching position. And the knurling 240 after abrasion has a smaller diameter than before abrasion. Therefore, at the pinched position before wear, a distance is created between the knurling 240 and the cord CD, and the cord CD cannot be properly pinched. However, since the movement trajectory (the first side wall hole 119A corresponding to the regulating groove) extends beyond the constricted position in the initial state (before wear) of the knurling 240, the knurling 240 after wear has The knurling 240 moves to a position beyond the stenosis position and enters a stenosis state in which the cord (CD) is stenotic at this stenosis position.

5. Fifth embodiment

Next, the braking device 5000 according to the fifth embodiment will be described using FIGS. 28 to 34. The braking device 5000 according to the present embodiment has a configuration in which a motion conversion unit DT and a resistance application unit RA are arranged in parallel, as shown in FIG. 28 and the like. Hereinafter, an outline of this embodiment will be described.

As shown in FIGS. 28 to 30, the motion conversion unit DT includes a catch roller 32A composed of an inner cylinder 42A and an outer cylinder 240A, and a so-called fixed sheave that can rotate on the axis 31. It consists of a catch roller (32B) made of knurling (240) installed to do so. Additionally, both catch rollers 32A and 32B are installed in case 440A. The cord CD is narrowed by the rotational torque of the catch rollers 32A and 32B. Additionally, the cord CD is inserted and passed through the motion conversion unit DT through the cord insertion hole 14A. The catch roller 32A will be described in detail later.

The resistance imparting unit RA is a so-called centrifugal governor, and the weight 340A revolves around the damper axis shown in FIG. 29, and when the weight 340A moves toward the outer diameter side due to centrifugal force, it comes into contact with the case 10Aa. Friction occurs and generates braking force. The rotation transmission mechanism (not shown) that rotates the weight 340A is connected to the axis 31 of the catch roller 32B, and when the catch roller 32B rotates, the power due to this rotation moves the rotation transmission mechanism. It is transmitted to the resistance imparting unit (RA) through, and therefore the weight 340A rotates around the damper axis. The number of weights 340A is not limited, and may be, for example, 2, 4, 8, or 16.

The catch roller 32A is configured to allow the inner cylinder 42A and the outer cylinder 240A to rotate relative to each other, and is also configured to have sliding resistance during such relative rotation. As shown in FIG. 31, the outer circumference of the inner cylinder 42A is surrounded by the outer cylinder 240A. This will be explained in detail later. A rotating shaft (31B) and a guide shaft (31C) are installed on the side of the inner cylinder (42A), and a guide groove (31Ca) is installed in the case (440A) to guide the movement of the bearing of the rotating shaft (31B) and the guide shaft (31C). It is done. That is, the catch roller 32A is configured to rotate around the rotation axis 31B. The guide groove 31Ca is installed so that one side brings the catch roller 32A and the cord CD close to each other, and the other side moves the catch roller 32A and the cord CD away from each other. That is, the guide groove 31Ca is formed so that the catch roller 32A moves away from the cord CD from one side to the other side. Here, in the fifth embodiment, the guide groove 31Ca corresponds to a regulating groove and extends beyond the constricted position in the initial state of the constricted bodies (catch rollers 32A and catch rollers 32B). Meanwhile, in Fig. 30(a), a predetermined constriction position is indicated by a dotted circle, and the following description explains the operation after the constrictor is worn.

According to this structure of the guide groove 31Ca, when the cord CD moves in the braking direction indicated by the arrow in the drawing in FIG. 30, the catch roller 32A rotates around the rotation axis 31B, Accordingly, the guide axis 31C moves along the guide groove 31Ca. Here, the inner peripheral surface of the guide groove 31Ca is formed by the constriction guide slope 31a, the release guide slope 3lb, the constriction side regulating surface 31c, and the release side regulating surface 31d. Then, the rotation of the catch roller 32A is restricted at the position (first position) where the guide shaft 31C is located on one side of the guide groove 31Ca shown in Fig. 30(a). In this state, when the cord CD is pinched by the catch rollers 32A and 32B and the cord CD moves further in the braking direction, the outer cylinder 240A in the catch roller 32A is pressed against the inner cylinder 42A. It rotates, and the catch roller 32B rotates around the axis 31. In other words, a resistance force is applied by the resistance providing portion RA connected to the catch roller 32B, thereby braking the movement of the cord CD.

Furthermore, according to this structure of the guide groove 31Ca, when the cord CD moves in the release direction indicated by the arrow in the drawing in FIG. 30, the catch roller 32A rotates around the rotation axis 31B. And, according to this, the guide shaft 31C moves along the guide groove 31Ca. At this time, the movement (rotation) trajectory of the catch roller 32A follows the guide groove 31Ca. Additionally, as shown in Fig. 30(b), the movement trajectory extends beyond the predetermined constriction position. Meanwhile, since the same applies to Modification Examples 1 to 3 of the fifth embodiment described later, illustration and description are omitted.

And, the rotation of the catch roller 32A is restricted at the position (second position) where the guide shaft 31C is located on the other side of the guide groove 31Ca shown in Fig. 30(b). In this state, the cord (CD) is not pinched by the catch rollers 32A, 32B or is only pinched with a relatively weak force, and even if the cord (CD) moves further in the release direction, the catch roller (32B) The catch roller (32B) does not rotate because there is not enough torque to rotate it. Therefore, resistance is not applied by the resistance imparting portion RA.

In summary, in the process of changing from the state of FIG. 30(a) to the state of FIG. 30(b), a resistance force by the resistance imparting unit RA is applied to the cord CD, but in the state of FIG. 30(b) In this case, the resistance imparting unit (RA) does not work. And, in the state of FIG. 30(b), the distance between the outer cylinder 240A and the knurled 240 is longer than the state of FIG. 30(a), so the clamping force to the cord CD becomes weaker. Accordingly, since the braking force applied to the cord CD is released, free movement of the cord CD is realized. In addition, in the process of changing from the state in FIG. 30(b) to the state in FIG. 30(a), a resistance force by the resistance applying portion RA is applied to the cord CD, and in the state in FIG. 30(a) At the same time that the cord (CD) is constricted, the resistance imparting portion (RA) acts.

On the other hand, the sliding resistance of the inner cylinder 42A and the outer cylinder 240A during relative rotation may be a resistance that disables relative rotation when the guide shaft 31C rotates to the first position. Taking this into account, the inner cylinder 42A and the outer cylinder 240A in the catch roller 32A can be configured as follows.

In one example, the catch roller 32A shown in Fig. 32(b) is realized through a press fitting process of the inner cylinder 42A into the outer cylinder 240A as shown in Fig. 32(a). In another example, as shown in FIG. 33, the elastic portion 42Aa is provided on the surface of the inner cylinder 42A, so that the desired resistance can be obtained. In another example, as shown in FIG. 34, a spring member 42Ab that applies pressure to the outer cylinder 240A is provided on the inner cylinder 42A, so that a desired resistance force can be obtained. Additionally, it may be lubricated with a high viscosity grease to stabilize the resistance.

<Modification 1 of the fifth embodiment>

In addition, as shown in FIG. 35, the braking device 5100 according to the present modification is configured to operate the case 10Aa so that the guide shaft 31C is located in the first position except when the cord CD is moved in the release direction. ) A torsion spring 31Cb as a biasing means with a coil wound around the rotating shaft 31B is disposed between the fixing portion 441A and the guide shaft 31C, and the guide shaft 31C is held by the torsion spring 31Cb. You can tax it. Here, in this modification, the guide groove 31Ca corresponds to a regulating groove and extends beyond the constriction position in the initial state of the constriction member (catch roller 32A). Meanwhile, in Figure 35(a), a predetermined constriction position is indicated by a dotted circle.

Likewise, in this modified example, the regulating groove extends beyond the constricted position in the initial state of the catch roller 32A, so that the code CD can be properly adjusted even when the diameter of the catch roller 32A becomes smaller due to wear. It can become narrow.

<Modification 2 of the fifth embodiment>

Next, the braking device 5200 according to Modification 2 of the fifth embodiment will be described using FIGS. 36 and 37. As shown in FIGS. 36 and 37, the braking device 5200 according to this modification has a configuration in which the motion conversion unit (DT) and the resistance imparting unit (RA) are arranged in parallel in the left and right directions (direction perpendicular to the ground). It is done. Hereinafter, an outline of this modification will be described.

As shown in FIG. 36, the motion conversion unit DT is a catch roller 32A made of an inner tube 42A and an outer tube 240A, and a knurling 240 rotatably mounted on the shaft 31. It consists of (32B). The inner cylinder 42A and the outer cylinder 240A have the same configuration as Figures 28 and 30 and are configured to rotate relative to each other. Additionally, a rotation shaft 31B and a guide shaft 31C are installed on the side of the inner cylinder 42A. Also in this modification, the catch roller 32A is configured to be rotatable about the rotation axis 31B. Additionally, the guide groove 31Ca is installed on the side of the case 440B at a position where the catch roller 32B can change its state between pinching and releasing the cord CD. Here, in this modification, the confinement body is formed by the catch roller 32A and the catch roller 32B. Additionally, in this modification, the guide groove 31Ca corresponds to a regulation groove and extends beyond the constriction position in the initial state of the constriction bodies (catch roller 32A and catch roller 32B). Meanwhile, in Figure 36(a), a predetermined stenosis position is indicated by a dotted circle.

And, in this modification, a pinion gear 50B is installed on the side of the outer cylinder 240A. The pinion gear 50B has a rotation axis perpendicular to the ground. And, it is formed to engage with the inner teeth of the transmission gear 261B installed in the resistance providing portion RA. Additionally, a speed increase gear 280B is installed at a position engaging with the outer teeth of the transmission gear 261B. The speed increase gear 280B can be rotatably installed on the support shaft 263B. And, as shown in Figure 36(b), a weight holder 320B that rotates integrally with the speed increase gear 280B is installed on the same axis as the speed increase gear 280B. And, the weight 340B is held by the weight holder 320B. Here, in this embodiment, four weights 340B are held by the weight holder 320B.

Since the weight holder 320B is installed to rotate together with the speed increase gear 280B, the weight holder 320B also rotates according to the rotation of the speed increase gear 280B. Accordingly, the weight 340B held in the weight holder 320B rotates.

As shown in Fig. 37, in this modification, the three cords CD are narrowed horizontally. This cord (CD) is inserted and passed through the cord insertion hole (14A) constituting the motion conversion unit (DT). In addition, the pinion gear 50B protrudes externally from the case 440B of the motion conversion unit DT and meshes with the transmission gear 261B of the resistance imparting unit RA disposed adjacent to the motion conversion unit DT. there is.

Therefore, when tension is applied to the cord CD in the braking direction, the catch roller 32A moves clockwise around the rotation axis 31B due to the frictional force generated between the outer cylinder 240A and the cord CD. have a meeting At this time, as the catch roller 32A rotates, the pinion gear 50B installed on the outer cylinder 240A also rotates clockwise. Then, the transmission gear 261B engaged with the pinion gear 50B begins to rotate counterclockwise. Accordingly, the speed increase gear 280B engaged with the transmission gear 261B begins to rotate clockwise. At this time, since the diameter of the speed increase gear 280B is smaller than the diameter of the transmission gear 261B, the rotation of the pinion gear 50B due to the movement of the code CD is increased and transmitted to the speed increase gear 280B. At this time, the inner cylinder 42A and the outer cylinder 240A rotate together due to the sliding resistance of both.

Then, due to the rotation of the speed increase gear 280B, the weight 340B begins to rotate clockwise. And, as the weight 340B comes into contact with the inner wall of the case 10Aa of the resistance providing portion RA, it becomes possible to apply a braking force to the movement of the cord CD. Then, in the state shown in Fig. 36(a), the guide shaft 31C and the guide groove 31Ca come into contact, thereby preventing the inner cylinder 42A from rotating. Then, when additional tension is applied to the cord CD in the braking direction, the outer cylinder 240A begins to rotate relative to the inner cylinder 42A. Accordingly, the braking force from the resistance applying portion RA can be applied while constricting the cord CD.

On the other hand, when tension is applied to release the cord CD, the catch roller 32A rotates counterclockwise around the rotation axis 31B. At this time, the pinion gear 50B, transmission gear 261B, and speed increase gear 280B rotate in the opposite direction to the case where tension is applied to the braking of the code CD. Then, in the state shown in Fig. 36(b), the guide shaft 31C and the guide groove 31Ca come into contact, thereby preventing the inner cylinder 42A from rotating. Then, the outer cylinder 240A continues to rotate relative to the inner cylinder 42A. In this state, the distance between the outer cylinder 240A and the knurling 240 becomes larger than Figure 36(a), and the cord CD cannot be sufficiently narrowed. Additionally, since the cord CD cannot be sufficiently narrowed, rotation of the outer cylinder 240A is also suppressed. Accordingly, the rotation resulting from the movement of the cord CD is not transmitted to the resistance imparting portion RA.

Likewise, in this modified example, the regulating groove extends beyond the constricted position in the initial state of the catch roller 32A or the catch roller 32B, causing the catch roller 32A or the catch roller 32B to be damaged due to wear. Even when the diameter is reduced, the cord (CD) can be properly narrowed.

<Modification 3 of the fifth embodiment>

Next, a braking device 5300 according to Modification 3 of the fifth embodiment will be described using FIGS. 38 to 40. As shown in FIGS. 36 and 37, the braking device 5300 according to this modification has a configuration in which the motion conversion unit (DT) and the resistance imparting unit (RA) are arranged in parallel in the left and right directions (direction perpendicular to the ground). It is done. Hereinafter, an outline of this modification will be described.

As shown in FIG. 38, the motion conversion unit (DT) includes a catch roller 830 made of an inner cylinder 830A and an outer cylinder 830B, and a knurling 43 rotatably mounted on the shaft 41. It consists of (840). The inner tube (830A) and the outer tube (830B) are mounted so that the inner tube (830A) can rotate on the rotation axis 831, as shown in Figure 31, and the inner tube (830A) and the outer tube (830B) can rotate relative to each other, and at the same time, for torque below a certain level. It is configured to rotate integrally by sliding resistance. However, unlike FIG. 31, the rotation shaft 831 is installed at the center of the catch roller 830 and is axially supported by the case 810A. Additionally, guide shafts 850 protrude toward both sides in the axial direction at positions eccentric from the rotation axis 831. In addition, in this modification, as shown in FIG. 39, the catch roller 840 is rotatably maintained in the support groove 821 (see FIG. 39) of the movable case 820 that can move in parallel in the vertical direction. Here, in this embodiment, a pair of constricting members (constricting bodies) are formed by the catch roller 830 and the catch roller 840.

Meanwhile, in this modified example as well, the resistance imparting unit RA is provided with a centrifugal governor and transmits the rotation of the rotating shaft 831 to the centrifugal governor for braking. As in the modified example 2, the outer cylinder 830B of the catch roller 830 The rotation is transmitted to the resistance providing portion RA through the pinion gear 50B (see FIG. 37). Regarding the structure of the resistance imparting portion RA, those described in the above-described embodiments can be used as appropriate.

The moving case 820 is provided with a pair of parallel plates 822 formed at both ends of the catch rollers 830 and 840, and a support groove 821 is formed on each parallel plate 822 (see FIG. 39). . Additionally, a guide groove 823 opening upward is formed in the center of the front-back direction above the parallel plate 822. In addition, the parallel plate 822 has a long hole 824 through which the guide shaft 850 can be inserted at a position in front of the guide groove 823, and the long hole 824 allows the guide shaft 850 to move in the front-back direction. It is formed in a direction that allows movement. Here, in this modification, the guide groove 823 corresponds to a regulating groove and extends beyond the constriction position in the initial state of the constriction body (catch rollers 830, 840). Meanwhile, in Fig. 38(b), a predetermined constriction position is indicated by a dotted circle, and the following description explains the operation after the constriction body is worn.

Here, in this modification, in a state in which no tension is applied to the cord CD (normal state), as shown in FIG. 38(a), the cord CD only moves to the catch roller 830 located above. It is configured to contact but not contact the catch roller 840.

With the above configuration, when the cord CD moves backward (to the right in Fig. 38) from a state in which no tension is applied to the cord CD (normal state), the outer cylinder 830B of the catch roller 830 tries to rotate counterclockwise (arrow 40(a)), the movement of the cord CD is not sufficiently transmitted as the rotation of the catch roller 830 (outer cylinder 830B), and the rotation of the outer cylinder 830B is transmitted to the resistance applying portion RA. No resistance is given to the cord (CD). Meanwhile, in this case, even if the outer cylinder 830B rotates, the guide shaft 850 provided in the inner cylinder 830A is in contact with the long hole 824 of the movable case 820, so that the movable case 820 is moved to the case 810A in the front-back direction. ), the inner cylinder 830A cannot rotate counterclockwise.

On the other hand, when the cord CD moves forward (to the left in the figure), the outer cylinder 830B of the catch roller 830 rotates clockwise (in the direction of arrow Y), as shown in FIG. 38(b). In this case, since there is sliding resistance between the outer cylinder 830B and the inner cylinder 830A, the outer cylinder 830B and the inner cylinder 830A begin to rotate together. Then, at the same time as the inner tube 830A rotates, the guide shaft 850 provided on the inner tube 830A rotates clockwise, and pressurizes the upper surface of the long hole 824 of the mobile case 820 to move the mobile case 820. Push upward (see Figures 38(b), 39(b), and 40(b)). As a result, the catch roller 840 held in the moving case 820 moves upward, that is, in a direction closer to the code CD, and cooperates with the catch roller 830 to narrow the code CD.

In this state, when the cord CD moves further forward (to the left in the figure), the movement of the cord CD is transmitted as rotation of the outer cylinder 830B. However, after the catch roller 840 comes into contact with the cord (CD), the moving case 820 cannot move upward any further, and the inner cylinder 830A cannot rotate any further, so the inner cylinder 830A cannot rotate any further. Only the external cylinder (830B) rotates.

As a result of the above, when the code (CD) moves forward (to the left in the figure) with the catch roller 830 and the catch roller 840 in Figure 38(b) narrowing the code (CD), the code (CD) moves This rotation of the outer cylinder 830B is sufficiently transmitted, and the resistance applying portion RA applies a braking force to the rotation of the outer cylinder 830B, thereby braking the cord CD.

Likewise, in this modified example, the regulating groove extends beyond the constricted position in the initial state of the catch roller 32A or catch roller 32B, thereby reducing the diameter of the catch roller 32A or catch roller 32B due to wear. Even when the cord (CD) becomes smaller, the cord (CD) can be properly narrowed.

6. Sixth Embodiment

Next, the braking device 6000 according to the sixth embodiment of the present invention will be described using FIGS. 41 to 43. The braking device 6000 of this embodiment is similar to the braking device 1000 described in the second embodiment. However, the main point of the braking device 6000 of this embodiment is that both axial end sides of each axis of a pair of constricting members are maintained by a link mechanism 720 composed of a pair of link plates 721 and 722. It is becoming a difference. Meanwhile, in the following description, the same symbols are attached to members of the same configuration as in the first embodiment, and parts with different configurations are mainly explained.

Here, the braking device 6000 according to the sixth embodiment does not have a regulating groove, unlike the first to fifth embodiments. Meanwhile, in Figure 43(a), a predetermined constriction position is indicated by a dotted circle, and the following description explains the operation after the constrictor is worn.

As shown in FIG. 41, a pair of constricting members according to the present embodiment is composed of a tension transmission roller 30 with knurling 240 and an idle roller 40 with a roller portion 42. The axis 31 of the tension transmission roller 30 extending in the vertical direction is supported on one end of the pair of link plates 721 on both ends in the axial direction, and the axis of the idle roller 40 extending in the vertical direction is supported. Similarly, (41) is axially supported on one end of a pair of link plates 722 on both ends in the axial direction. In addition, the shaft center 31 of the tension transmission roller 30 is equipped with a pinion gear 50 at the end opposite to the tension transmission roller 30, as in the second embodiment described above.

The link plate 721 and the link plate 722 are connected to enable relative rotation through an axis 723 inserted into a hole formed in the center of the plate to form a link mechanism 720. Additionally, connection pins 724 and 725 (see FIG. 42) extending in the vertical direction and connecting the link plates 721 and 722 are installed at the other ends of the link plates 721 and 722.

And, as shown in FIG. 43, the connecting pin 724 and the connecting pin 725 are pressed in a direction to approach each other by a torsion spring 726 as a biasing means whose coil portion is wound around the shaft 723. Accordingly, the link plate 721 and the link plate 722 are centered on the axis 723, and the tension transmission roller 30 and the idle roller 40, which each maintain, are biased to rotate in a direction close to each other, and as a result, , the cord CD is narrowed by these rollers 30 and 40. Meanwhile, although not shown in FIG. 41, the shaft 723 is supported by the case 10A.

With the above configuration, in a state (normal state) in which no tension is applied to the cord CD as shown in Fig. 43(a), the tension transmission roller 30 and the idle roller 40 have a link mechanism ( The cord CD is constricted by being biased against the torsion spring 726 through 720). In this state, when the code (CD) moves forward (to the left in Figure 43), the movement of the code (CD) is transmitted to the tension transfer roller 30, and the rotation of the tension transfer roller 30 is carried out by the carrier 260 with internal teeth. ), the planetary gear 280, and the sun gear weight holder 320 are sequentially transmitted to rotate the weight 340 (see FIG. 2) so that a braking force is applied to the cord (CD) by the rotation resistance of the weight 340. there is. That is, in this embodiment as well, the constriction member pinches the cord CD as the link mechanism 720 (link plate 721 and link plate 722), which is a holding member, moves. At this time, the movement traces of the roller portion 42 and the knurling 240 are as shown by the two arrows in Fig. 43(a). Additionally, as shown in Figure 43(a), the movement trajectory extends beyond the predetermined constriction position.

On the other hand, when the code CD moves backward (to the right in FIG. 43), as shown in FIG. 43(b), the tension transmission roller 30 and the link plate 722 held in the link plate 721 The maintained idle roller 40 resists the biasing force of the torsion spring 726 through the link mechanism 720 as the cord (CD) moves and is centered on the axis 723 and is aligned with the tension transmission roller 30 and the idle roller 40. The rollers 40 rotate in a direction where the distance between them increases. Accordingly, the constriction of the cord CD by the constrictor is weakened, and the provision of resistance to the cord CD by the resistance applying portion RA through the tension transmission roller 30 is reduced.

Meanwhile, in the above embodiment, the link mechanism 720 was configured to have a pair of link plates 721 and 722 disposed on both ends in the axial direction, but the pair of link plates was installed only on one side of the axial direction. It is also possible to do so.

Although various embodiments have been described above, the present invention is not limited to these, and the shielding device 100A of the present invention may have a structure different from the shielding device 100A of the above-described embodiment. For example, the solar radiation shielding device of the present invention may be a roll curtain in which a curtain cloth is wound, or a blind in which a plurality of slats are raised and lowered. Additionally, as shown in FIG. 44, the braking device 1000 may be fixed to the window frame 110 using screws 111 or the like. Additionally, the braking device 1000 may be installed inside the grip 109. Additionally, the braking device 1000 may be installed at any location along the passage path of the lifting cord 102.

As described above, according to the present invention, a braking device is provided that can appropriately pinch the cord even when the constrictor that pinches the cord becomes smaller due to wear, thereby preventing deterioration of the member.

10A: Case
31, 41: Axis
50: pinion gear
70: base
200: alignment member
220: Slider
240: Knurling
260: Carrier with inner teeth
280: planetary gear
300: plate
320: Sun gear weight holder
340: weight

Claims (17)

As a braking device that brakes the longitudinal movement of the cord,
comprising a constrictor having a pair of constriction members for constricting the cord,
At least one of the constricting members is configured to move along a predetermined movement trajectory,
The constrictor constricts the cord at a predetermined constriction position of the movement trajectory,
wherein the movement trajectory extends past the constriction location where the constriction body constricts the cord. According to clause 1,
and the movement trajectory extends in a direction towards the cord. According to claim 1 or 2,
The braking device, wherein the movement trace is a trajectory of movement of at least one of the constricting members according to a regulation groove that regulates the movement of at least one of the constricting members. According to clause 3,
A braking device comprising a case containing at least one of the constricting members and having the regulating groove. According to clause 4,
The constriction body is composed of a first constriction member and a second constriction member,
the first constriction member has a shaft,
The regulating groove is formed so that the axis is accessible to the cord,
The constricted position is a position spaced apart from an end of the regulating groove on a side in an approach direction to the cord. According to clause 5,
the pair of constrictors move together in the movement trajectory,
The moving trajectory is configured such that its extension lines intersect each other. According to clause 6,
the second constriction member has a shaft,
The regulating groove is configured to enable clamping of the cord at a predetermined clamping position by moving the axes of the first clamping member and the second clamping member along the regulating groove. According to clause 7,
A braking device, wherein two regulating grooves are formed in the case and at least one has an arc shape. According to clause 8,
The two regulating grooves are configured to be inclined with respect to the moving direction of the cord. According to clause 8,
The two regulating grooves have different curvatures. According to clause 6,
A braking device, wherein the axis is arranged in a substantially vertical direction. According to clause 5,
The second constriction member is comprised by a constriction plane. According to clause 12,
A braking device, wherein the constriction plane is a fixed plane before and after movement of the first constriction member. According to clause 5,
A braking device comprising a biasing member that biases the first pinching member from a release position at which the cord is released toward a pinching position at which the cord is pinched. According to clause 3,
A braking device comprising a guide wall formed along an edge of the regulating groove. A braking device according to claim 1 or 2,
A shielding device comprising a shielding member suspended and supported so as to be lifted up and down by movement of the cord. A braking device according to claim 12,
a shielding member suspended and supported so as to be capable of being raised and lowered by movement of the cord;
Provided with a head box containing the braking device,
A shielding device, wherein the constriction plane is the bottom of the head box.