JP6895983B2 - Braking device and shielding device using it - Google Patents

Description

The present invention relates to a braking device and a shielding device using the braking device, and more particularly to a braking device that can be used to appropriately decelerate the movement of an elevating cord.

In addition to roll curtains and blinds, semi-automated cloaking devices such as accordion screens, pleated screen doors, and partitions have been put into practical use. For example, when the horizontal blind is opened, the slats and bottom rails, which are shielding members, are pulled up by pulling the operation cord. When the horizontal blind is closed, the slats and the bottom rail are generally lowered by gravity using the weight of the slats and the bottom rail. At this time, a mechanism is known that applies a braking force to the elevating cord that moves with the descent of the slat and the bottom rail to reduce the descending momentum of the slat and the bottom rail.

Patent Document 1 describes a damper including a centrifugal governor that generates a braking force and a shaft (a sandwiching body that sandwiches the cord) connected to the brake portion, and the elevating cord comes into contact with the outer peripheral surface of the shaft. However, there is disclosed a blind lifting device including a damper, wherein the shaft is rotated by the movement of the lifting cord to operate the brake portion. By using this damper, it is possible to reliably give resistance to the movement of the lifting cord due to the lowering of its own weight.

Japanese Unexamined Patent Publication No. 2005-0304

However, in the damper disclosed in Patent Document 1, when the sandwiched body is worn due to friction with the elevating cord and the diameter of the sandwiched body becomes small, or when the diameter of the elevating cord becomes small, Cannot properly resist the cord.

The present invention has been made in view of such circumstances, and even when the sandwiching body for sandwiching the cord becomes smaller due to wear or the diameter of the elevating cord becomes smaller, the cord is appropriately sandwiched. It provides a possible braking device.

According to the present invention, it is a braking device that brakes the movement of the cord in the longitudinal direction, includes a sandwiching body having a pair of sandwiching members that sandwich the cord, and at least one of the sandwiching members is a predetermined one. The braking device is configured to move in a movement locus, the sandwiching body sandwiches the cord at a predetermined pinching position of the moving locus, and the moving locus extends beyond the pinching position. Provided.

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 moving locus, and the moving locus extends beyond the pinching position. To do. With such a configuration, the cord is sandwiched at a predetermined pinching position before the sandwiching body is worn, and after the sandwiching body is worn, the cord extends beyond the predetermined pinching position to a range on the movement locus. By moving the sandwiching body, the cord can be appropriately sandwiched even after the sandwiching body is worn, and the braking performance can be maintained. Further, even when the cord diameter is reduced due to wear of the cord, the same effect is obtained.

Hereinafter, various embodiments of the present invention will be illustrated. The embodiments shown below can be combined with each other.
Preferably, the movement locus extends in the direction towards the cord.
Preferably, the movement locus is a locus of movement of at least one of the sandwiching members along a regulatory groove that regulates the movement of at least one of the sandwiching members.
Preferably, the case includes a case in which at least one of the sandwiching members is included and the regulation groove is provided.
Preferably, the sandwiching body is composed of a first sandwiching member and a second sandwiching member, the first sandwiching member has a shaft, and the regulation groove has the shaft approaching the cord. Formed as possible,
The pinching position is a position separated from the end of the regulation groove on the approaching direction side with respect to the cord.
Preferably, the pair of sandwiching bodies move together in the movement locus, and the movement loci are configured such that their extension lines intersect each other.
Preferably, the second sandwiching member has a shaft, and the regulation groove has a predetermined sandwiching by moving the shafts of the first sandwiching member and the second sandwiching member along the regulation groove. The cord can be sandwiched at the position.
Preferably, the regulation groove is formed in the case and at least one is arcuate.
Preferably, the two regulating grooves are configured to be inclined with respect to the moving direction of the cord.
Preferably, the two regulating grooves have different curvatures from each other.
Preferably, the shaft is arranged in a substantially vertical direction.
Preferably, the second sandwiching member is composed of a sandwiching plane.
Preferably, the sandwiching plane is a plane fixed before and after the movement of the first sandwiching member.
Preferably, the first pinching member has an urging member that urges the first pinching member from a release position for releasing the cord toward a pinching position for sandwiching the cord.
Preferably, it has a guide wall formed along the edge of the regulation groove.
Preferably, a shielding device including the braking device according to any one of the above and a shielding member that is suspended so as to be able to move up and down by moving the cord is provided.
Preferably, the second sandwiching member includes a braking device formed of a sandwiching plane, a shielding member that is lifted and lowered by moving the cord, and a head box that includes the braking device. A shielding device is provided in which the sandwiching plane is the bottom surface of the headbox.

It is a figure which shows an example of the shielding device 100A which concerns on 1st Embodiment of this invention. It 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 upper side, and (b) is a view seen from the rear upper side. It 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 seen from the rear lower side. It is an assembly drawing of the braking device 1000 which concerns on one Embodiment of this invention, (a) is a front perspective view, (b) is a rear perspective view, (c) is a left side view. It is an assembly drawing of the braking device 1000 which concerns on 1st Embodiment of this invention, (a) is a plan view, (b) is a bottom view. It is an assembly drawing which removed the case 10A from the braking device 1000 which concerns on 1st Embodiment of this invention, (a) is a front perspective view, (b) is a rear perspective view. It is an assembly drawing which further removed the slider 220 from FIG. 6, (a) is a front perspective view, (b) is a rear perspective view. It is an assembly drawing which further removed the carrier 260 with internal teeth from FIG. 7, (a) is a front perspective view, and (b) is a rear perspective view. It is sectional drawing which shows the positional relationship of the knurl 240, the slider 220 and the pinion gear 50 which concerns on 1st Embodiment of this invention, and is a part of the sectional drawing which passes through the substantially center of the shaft core 31 when viewed from the left side surface of the braking device 1000. Is. It is a figure which shows the alignment member 200 which concerns on 1st Embodiment of this invention, (a) is a perspective view, (b) is a front view. It is a figure which shows the case 10A which concerns on 1st Embodiment of this invention, (a) is a front perspective view, (b) is a rear perspective view. It is a figure which shows the case 10A which concerns on 1st Embodiment of this invention, (a) is a plan view, (b) is a perspective view seen from the lower side. It is a figure which shows the slider 220 which concerns on 1st Embodiment of this invention, (a) is a front perspective view, (b) is a rear perspective view seen from the lower side, (c) is a plan view. It is a figure which shows the case 10A and the slider 220 which concerns on 1st Embodiment of this invention, (a) is the perspective view seen from the lower side, (b) is the perspective view seen from the upper side. It is an exploded perspective view which shows the member other than case 10A and slider 220 which concerns on 1st Embodiment of this invention. FIG. 4C is a cross-sectional view taken along the line AA of FIG. 4 (c). 5 (a) is a cross-sectional view taken along the line BB of FIG. 5 (a). 16A and 16B are views showing how the braking device 1000 of the present invention brakes the cord CD. FIG. 16A shows a state in which no tension is applied to the cord CD (steady state), and FIG. 16B shows the cord CD. When tension is applied and the cord CD is sandwiched between the lorlet 240 and the roller portion 42 (sandwiched state), (c) summarizes the rotation directions of each member when the state changes from (a) to (b). It is a figure. It is a figure which shows the state of movement of the slider 220 corresponding to FIG. It is a figure for demonstrating the predetermined pinching position in the initial state (before wear) of the pinching body (roller portion 42), and the pinching position after wear. It is a figure which shows the member used for the motion conversion part which concerns on 2 Embodiment of this invention, (a) shows the state that the knurl 240 and the roller part 42 are connected by the plate 800, and (b) is the string-shaped member 900. The knurl 240 and the roller portion 42 are connected to each other. FIG. 21B is a schematic view of a state in which the member of FIG. 21B sandwiches the cord CD as viewed from the direction of arrow Z. It is a figure which shows the mode that the code CD is braked by the motion conversion part which concerns on 2nd Embodiment of this invention, (a) is a figure which shows the free movement state, (b) is a figure which shows the pinched state. It is a figure which shows the mode that the code CD is braked by another motion conversion part which concerns on 3rd Embodiment of this invention, (a) is a figure which shows the free movement state, (b) is a figure which shows the pinched state. It is a figure explaining the motion conversion part which concerns on 4th Embodiment of this invention, (a) is a figure which shows the free movement state, (b) is a figure which shows the pinched state. It is a figure explaining the motion conversion part which concerns on the modification of 4th Embodiment of this invention, (a) is a figure which shows the free movement state, (b) is a figure which shows the pinched state. It is a figure explaining the motion conversion part which concerns on the modification of 4th Embodiment of this invention, and it describes how the cord CD can be appropriately sandwiched even when the diameter of the knurl 240 becomes small due to wear. It is a figure for. It is a perspective view of the braking device 5000 which concerns on 5th Embodiment of this invention. It is a top view of the braking device 5000. It is a front view of the braking device 5000, (a) is a view which shows the pinched state, and (b) is a figure which shows the released state. FIG. 30 is a cross-sectional view taken along the line PP of FIG. It is a figure which shows the state of press-fitting the inner cylinder 42A into the outer cylinder 240A, (a) is before press-fitting, (b) is after press-fitting. It is a figure which shows the example which provides the elastic part 42Aa on the surface of the inner cylinder 42A. It is a figure which shows the example which provides the spring member 42Ab in the inner cylinder 42A. It is a figure which shows the braking device 5100 which concerns on the modification 1 of the 5th Embodiment of this invention. It is a figure which shows the braking device 5200 which concerns on the modification 2 of the 5th Embodiment of this invention, (a) is a figure which shows the pinched state, and (b) is a figure which shows the released state. FIG. 36 is a cross-sectional view taken along the line FF of FIG. It is explanatory drawing which shows the braking device 5300 which concerns on the modification 3 of the 5th Embodiment of this invention, (a) is the state which sandwiched the cord CD, and (b) is the cord CD by the narrowed body. Indicates a state in which narrowing is released. It is sectional drawing when the braking device 5300 of FIGS. 38 (a) and 38 (b) is cut along the JJ line of the figure, respectively. It is sectional drawing when the braking device 5300 of FIGS. 38 (a) and 38 (b) is cut along the KK line of the figure, respectively. It is a schematic perspective view which shows the narrow body and the link mechanism 720 of the braking device 6000 which concerns on 6th Embodiment of this invention. In order to show a state in which the motion conversion unit DT of the first embodiment is combined with the narrow-fitting body and the link mechanism 720 of the braking device 6000 of FIG. 41, the narrow-fitting body and the link mechanism 720 are described on the cross-sectional view of FIG. It is a top view schematically shown. It is a figure which shows the state which the braking device 6000 of FIG. 41 brakes a cord CD, (a) is a state which sandwiched the cord CD by the sandwiching body, (b) is the narrowing of the cord CD by the narrowing body is released. Indicates the state of being done. It is a figure for demonstrating another mounting position of the braking device which concerns on embodiment of this invention.

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

1. 1. First Embodiment 1-1 <Overall configuration>
In the shielding device 100A shown in FIG. 1, a plurality of stages of solar shielding members 101 are suspended and supported from a hollow head box 130 via a plurality of ladder cords 123, and a bottom rail 122 is provided at the lower end of the ladder cord 123. Suspended and supported. 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 provided at both ends thereof. Further, inside the head box 130, a cord outlet 135 for inserting the cord CD into the operation rod 108 is provided. The structure of the ladder cord 123 is not limited as long as it can support and rotate the solar shielding member 101. For example, the ladder cord 123 includes two warp threads separated from each other, and one warp thread is attached to one edge of the slats. It may be configured such that it is attached and the other warp is attached to the other edge of the slats.

A plurality of support members (not shown) are arranged in the head box 130, and a tilt drum (not shown) is rotatably supported by the support members. The upper end of the ladder cord 123 is attached to the tilt drum, and the shaft 124 (shaft member) is fitted into all the tilt drums at the center of the tilt drum. Therefore, when the shaft 124 is rotated, all the tilt drums are rotated, and one of the warp threads of the ladder cord 123 is pulled up with the rotation of the tilt drums, so that the solar radiation shielding member 101 and the bottom rail 122 are moved. The angle is adjusted in the same phase.

An operation rod 108 made of a tubular body is suspended and supported at one end of the head box 130, and an operation portion 120 is provided at the lower end of the operation rod 108. When the operation unit 120 is gripped and the operation rod 108 is rotated, the angle adjusting shaft is rotated via the gear mechanism arranged in the head box 130. Therefore, the angle of each solar shielding member 101 can be adjusted by rotating the operating rod 108.

A plurality of (three in this embodiment) elevating cords 102l, 102c, 102r (when distinction is not necessary, simply referred to as "elevating cord 102") are suspended from the head box 130, and each elevating cord is hung. One end of 102 is attached to the bottom rail 122. A turning pulley (not shown) is pivotally supported on each support member at an axial center in the front-back direction of the drawing, and an elevating cord 102 introduced into the head box 130 can be turned and guided in the left-right direction of the head box. Further, each support member has a space through which other elevating cords can pass in the left-right direction. Therefore, the other end of the elevating cord 102r at the right end is redirected and guided by the support member, and the elevating cords on the non-operating side (elevating cords 102l and 102c at the left end and the center) pass through the supporting members and pass through the operating rod 108 in the head box 130. You will be guided in the direction. Then, it is inserted into the tubular operation rod 108 via the lock portion 104 and the braking device 1000 provided in the head box 130, and the tip thereof is connected to the cord equalizer 121 provided below the operation portion 120. Therefore, when the cord equalizer 121 is pulled downward and the elevating cord 102 is pulled out from the head box 130, the bottom rail 122 is pulled up, so that the solar radiation shielding member 101 is pulled up.

The lock unit 104 permits or restricts the movement of the code CD by the operation of the code CD (see FIG. 4).

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

The braking device 1000 is arranged in the head box 130 so that the front side shown in FIG. 4 faces the lock portion 104 side and the rear side faces the cord outlet 135 side. Therefore, when the solar radiation shielding member 101 is fully lowered, that is, when the shielding device 100A is closed, when a set of cord CDs is pulled downward, the cord CDs are pulled backward as shown in FIG.

On the other hand, in a state where the solar radiation shielding member 101 is not fully lowered, the code CD is released in a state where the code CD is not locked by the lock portion 104. Then, the solar radiation shielding member 101 descends due to its own weight. Therefore, the elevating cord 102 is pulled out from the inside of the head box 130. Therefore, the cord CD connected to the elevating cord 102 is pulled toward the front of the braking device 1000. Then, a braking force is applied to the code CD. Therefore, the descending speed of the solar radiation shielding member 101 is suppressed. Therefore, it is possible to suppress damage or the like caused by the descending speed of the solar shielding member 101 being exceeded. Such an operation will be described in detail with reference to FIG. 18 described later.

As described above, according to the shielding device 100A of the present embodiment, the braking device 1000 appropriately applies a braking force to the movement of the cord CD that enables the solar radiation shielding member 101 to move up and down in the longitudinal direction. For example, even when the solar radiation shielding member 101 descends due to its own weight as described above, 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 with reference to FIGS. 2 to 22. The braking device 1000 according to the present 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 related to the motion conversion unit and the mechanism related to the resistance applying unit are provided so as to be positioned substantially vertically. In the present embodiment, the motion conversion unit converts the movement of the code CD into the motion of another member. Further, the resistance imparting unit generates a resistance force with the movement of the cord CD when the cord CD moves relative to each other in one direction. Here, in the present embodiment, the idle roller 40 including the slider 220, the coil spring SP, the shaft core 41 and the roller portion 42, the knurl 240, the pinion gear 50, the shaft core 31, the washer 241, the carrier 260 with internal teeth and the planet. The gear 280 constitutes a motion conversion unit, and the weight 340, the weight holder 320 with a sun gear, and the case 10A form a resistance imparting unit.

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

In the present embodiment, the idle roller 40 and the knurl 240 are a pair of sandwiching members (first sandwiching member and second sandwiching member) for sandwiching the cord, and they cooperate to form a sandwiching body. Function. Further, the idle roller 40 functions as a support column, and the knurl 240 functions as a roller that rotates by moving the cord in the longitudinal direction. Further, the slider 220 holds the idle roller 40 and the knurl 240. Further, the case 10A and the base 70 are formed of, for example, resin.

As shown in FIGS. 2 and 3, in the present embodiment, the carrier 260 with internal teeth is provided with four planetary gears 280, and the weight holder 320 with sun gears holds eight weights 340. Hereinafter, each member will be described.

1-2-1 <Alignment member 200>
As shown in FIGS. 4A and 4B, the alignment member 200 inserts the cord CD and adjusts the orientation of the cord CD. Further, a plurality of code CDs are arranged in the same direction with each other. The aligning member 200 can be formed of, for example, a resin such as plastic. Here, as shown in FIG. 4A, the directions of the arrows are front-back, left-right, and up-down, respectively. That is, the direction in which the distance between the first top wall groove 16 and the second top wall groove 17 becomes narrow is set to the front, and the left-right direction (width direction) and the up-down direction are determined.

As shown in FIG. 10A, the aligning member 200 includes a front wall portion 205, a right side wall portion 207 and a left side wall portion 208 connected to the front wall portion 205, and a right side wall portion 207 and a left side wall portion 208. It has a rear wall portion 206 connected to each of the above. The shapes of the front wall portion 205, the right side wall portion 207, the left side wall portion 208, and the rear wall portion 206 are arbitrary, but in the present embodiment, each has a substantially rectangular shape. Further, in the present 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. Further, 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 cord insertion portion 201A and the second front cord insertion portion 202A are for inserting the cord CD into the alignment member 200 after assembling the braking device 1000. The first front cord insertion portion 201A is formed wider than the first front groove 201. Further, the second front cord insertion portion 202A is formed to be wider than the second front groove 202. Therefore, the cord CD is inserted into the first front cord insertion portion 201A and the second front cord insertion portion 202A, and the cord CD is slid toward the first front groove 201 and the second front groove 202 as it is, thereby inserting the cord CD. It is possible to insert smoothly.

Further, in the first rear cord insertion portion 203A and the second rear cord insertion portion 204A, the cord CD inserted through the front wall portion 205 passes through the front and rear through holes 225 (see FIG. 13) of the slider 220, which will be described later, and is engaged. This is for pulling out the cord CD from the rear wall portion 206 to the outside. The first rear cord insertion portion 203A is formed wider than the first rear groove 203. Further, the second rear cord insertion portion 204A is formed wider than the second rear groove 204. Therefore, the cord CD is inserted into the first rear cord insertion portion 203A and the second rear cord insertion portion 204A, and the cord CD is slid toward the first rear groove 203 and the second rear groove 204 as it is. It is possible to insert smoothly.

The shapes of the first front cord insertion portion 201A, the second front cord insertion portion 202A, the first rear cord insertion portion 203A, and the second rear cord insertion portion 204A are arbitrary and are not limited to the shapes shown in FIG. For example, it may be substantially circular, or may be connected to the first front groove 201 (the same applies to other grooves) from a vertically elongated shape to an oblique shape. Further, in the present embodiment, a step 210 is provided between the first front cord insertion portion 201A and the first front groove 201, but the step 210 is not provided and the front wall portion 205 (or the rear wall portion 206) is provided. May be a substantially rectangular shape.

As shown in FIG. 10B, in the present embodiment, the front wall portion 205 and the rear wall portion 206 have substantially the same shape in the front view. Therefore, the code CD inserted from the first front cord insertion portion 201A passes through the first rear cord insertion portion 203A, and the code CD inserted from the second front cord insertion portion 202A passes through the second rear cord insertion portion 204A. To do. In other words, the first front groove 201, the first front cord insertion portion 201A, the first rear groove 203, and the first rear cord insertion portion 203A are a pair of corresponding grooves, respectively, and the second front groove 202 and the second front cord The insertion portion 202A, the second rear groove 204, and the second rear cord insertion portion 204A are a pair of corresponding grooves, respectively.

Here, as shown in FIG. 10A, when the right side wall portion 207 of the alignment member 200 is integrated by covering it from above the case 10A at the time of assembling the braking device 1000, a case described later will be described. A claw portion 209 for engaging with the engaging hole 19 (see FIG. 11) of 10A and fixing the alignment member 200 to the case 10A is provided. Although not shown in FIG. 10, a similar claw portion 209 is provided on the inner surface of the left side wall portion 208 so as to face each other. As a result, the right side wall portion 207 and the left side wall portion 208 are elastically deformed outward while the case upper portion 10A enters, and the two claw portions 209 provided on the alignment member 200 and the two engagements provided on the left and right sides of the case 10A. It becomes possible to elastically engage with the joint hole 19.

1-2-2 <Case 10A>
Next, the case 10A will be described with reference to FIGS. 11 (a) and 11 (b) and FIG. Hereinafter, in FIG. 12, the leftward direction will be described as forward, the rightward direction as rearward, the upward direction as the right side, and the downward direction as the left side. The case 10A constitutes a housing together with the base 70, and has a slider 220, a coil spring SP, an idle roller 40 including a shaft core 41 and a roller portion 42, a lorlet 240, a pinion gear 50, a shaft core 31, and a washer 241. It holds a carrier with internal teeth 260, a planetary gear 280, a plate 300, a weight holder 320 with a sun gear, and a weight 340.

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

As shown in FIG. 11, in the case 10A, the top wall portion 11 having a substantially square outer shape, the front side wall portion 12f, the right side wall portion 12r and the left side wall portion connected to the front side wall portion 12f and the top wall portion 11 12l, a rear side wall portion 12b connected to each of the right side wall portion 12r and the left side wall portion 12l, and a front side wall portion 12f, a rear side wall portion 12b, a front side wall portion 12f, and a left side wall portion facing the top wall portion 11. The main configuration includes a flange portion 13 extending from 12l toward the radial side, a cylindrical portion 13C connected to the flange portion 13, and a cover portion 112 connected to the cylindrical portion 13C.

Guide grooves 113 are formed in the front side wall portion 12f and the rear side wall portion 12b. These two guide grooves 113 face each other in the front-rear direction. These guide grooves 113 are grooves for inserting the cord CD in the front-rear direction. Here, the number of cord CDs to be inserted into the guide groove 113 is not particularly limited, but in the present embodiment, an example in which three cord CDs are inserted in the vertical direction is shown (see FIG. 4).

Further, the right side wall portion 12r and the left side wall portion 12l are provided with engagement holes 19. As described above, the engaging hole 19 engages with the claw portion 209 of the aligning member 200 and fixes the aligning member 200 to the case 10A.

Further, a support groove 114 is provided above the left and right engaging holes 19. As shown in FIG. 4, the support groove 114 supports the protrusion 230 provided on the slider 220 when the case 10A holds the slider 220 inside. As a result, the slider 220 can be supported in a floating state. The details will be described later.

A first top wall groove 16 and a second top wall groove 17 are formed in the top wall portion 11. As shown in FIG. 12A, the first top wall groove 16 and the second top wall groove 17 are formed obliquely with respect to the longitudinal direction, that is, the front-rear direction of the cord CD, respectively, and one of the cord CDs. The distance between the first top wall groove 16 and the second top wall groove 17 is reduced toward the front in the longitudinal direction. That is, the first top wall groove 16 is formed in an arc shape, and the inner peripheral surface is formed by the pinching guide slope 16a, the release guide slope 16b, the pinch side regulation surface 16c, and the release side regulation surface 16d. .. The arc of the first top wall groove 16 is formed so as to be concentric with the inner peripheral surface of the carrier with internal teeth 260 shown in FIG. 7 in a plan view. On the other hand, the second top wall groove 17 is formed in a shape that draws a gentle curve, and an inner peripheral surface is formed by the pinching guide slope 17a, the release guide slope 17b, the pinch side regulation surface 17c, and the release side regulation surface 17d. To. Specifically, the second top wall groove 17 has a substantially linear shape on the front side, and is curved in a direction away from the first top wall groove 16 toward the rear. This is because when the second top wall groove 17 is made substantially linear, the first top wall groove 16 is an arc that approaches the code CD from the rear to the front, so that, for example, the shaft core 31 and the shaft core 41 This is to prevent the displacement in the vertical direction with respect to the cord CD from being different between the shaft core 31 and the shaft core 41 when moving along the first top wall groove 16 and the second top wall groove 17, respectively. That is, if one is an arc and the other is substantially straight, the vertical distance to the code CD is different in the front-rear direction. In this way, by bringing the displacements of the shaft core 31 and the shaft core 41 with respect to the vertical direction close to each other, the knurl 240 and the roller portion 42 can appropriately sandwich the cord CD. The second top wall groove 17 is not limited to this, and for example, a groove having substantially the same shape as the first top wall groove 16 may be arranged to be curved toward the cord CD side. As a result, the displacement in the vertical direction with respect to the CD can be made substantially the same for the shaft core 31 and the shaft core 41, and the wear of the cord CD can be reduced. Here, in the second embodiment, in addition to making the displacement in the vertical direction with respect to the CD as similar as possible between the shaft core 31 and the shaft core 41, in consideration of the interaction due to the movement of other members and the like, FIG. The shape shown in (a) was adopted. Here, in the present embodiment, it can be said that the first top wall groove 16 and the second top wall groove 17 have different curvatures from each other.

As shown in FIGS. 11 (a), 11 (b), and 12 (a), the edge of the first top wall groove 16 is outside the case 10A in the first top wall groove 16 in the plan view of the case 10A. A first guide wall 16A projecting upward from the first top wall groove 16 is provided at least at a part of the position along the edge of the above. In the present embodiment, the first guide wall 16A is provided so as to be approximately 90 degrees with respect to the first top wall groove 16. The first guide wall 16A is intended to reduce the surface pressure of the shaft core 31 moving along the first top wall groove 16. That is, by providing the first guide wall 16A, the area in contact with the shaft core 31 is increased, so that the surface pressure of the shaft core 31 is reduced. This is because tension is applied to the cord CD and the surface pressure of the shaft core 31 is applied to the inner surface of the first top wall groove 16 while the braking device 1000 is operating, and the surface pressure is applied to the first top wall groove. This is because if the inner surface of 16 is scraped, the distance between the knurl 240 and the roller portion 42 changes, and the rotation transmission to the knurl 240 may become insufficient. By providing the first guide wall 16A, it is possible to prevent the case 10A from being scraped by the pressure from the shaft core 31. The wall thickness of the first guide wall 16A is arbitrary, but it may be appropriately designed in consideration of the material of the case 10A, the moving speed of the shaft core 31, and the like.

Further, in the plan view of the case 10A, the position along the outer edge of the case 10A in the second top wall groove 17 is at least a part of the position along the edge located far from the center of the case 10A. A second guide wall 17A that projects upward from the two top wall grooves 17 is provided. In the present embodiment, the second guide wall 17A is provided so as to be approximately 90 degrees with respect to the second top wall groove 17. The second guide wall 17A aims to reduce the surface pressure of the shaft core 41 moving along the second top wall groove 17. That is, by providing the second guide wall 17A, the area in contact with the shaft core 41 is increased, so that the surface pressure of the shaft core 41 is reduced. This is because tension is applied to the cord CD and the surface pressure of the shaft core 41 is applied to the inner surface of the second top wall groove 17 while the braking device 1000 is operating, and the surface pressure is applied to the second top wall groove. This is because if the inner surface of the 17 is scraped, the distance between the knurl 240 and the roller portion 42 changes, and the rotation transmission to the knurl 240 may become insufficient. By providing the second guide wall 17A, it is possible to prevent the case 10A from being scraped by the pressure from the shaft core 41. The wall thickness of the second guide wall 17A is arbitrary, but it may be appropriately designed in consideration of the material of the case 10A, the moving speed of the shaft core 41, and the like.

When the case 10A is molded from a strong material such as metal, it is not necessary to provide the first guide wall 16A and the second guide wall 17A. This is because the case 10A is robust, so that the case 10A is hardly scraped by the pressure from the shaft core 31 and the shaft core 41.

The flange portion 13 is a portion that faces the top wall portion 11 and extends radially from the front side wall portion 12f, the rear side wall portion 12b, the right side wall portion 12r, and the left side wall portion 12l. It is made to be approximately circular.

The cylindrical portion 13C is connected to the flange portion 13 and is located outside the inner peripheral gear 115. In the present 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 the present embodiment, the outer edge of the cover portion 112 is a substantially square shape. The cover portion 112 is provided with two first engaging grooves 111A at both ends on the left and right side surfaces. Two second engaging grooves 111B are provided at both ends of the front end portion, and one second engaging groove 111B is provided at substantially the center of the rear end portion. The first engaging groove 111A engages with the first engaging plate portion 701A of the base 70 shown in FIG. Further, the second engaging groove 111B engages with the second engaging plate portion 701B of the base 70. As a result, the case 10A and the base 70 are engaged with each other to form a housing.

Next, the internal structure of the case 10A will be described with reference to FIGS. 12 (b), 14 (a), and 16. As shown in FIG. 16, a ring-shaped inner peripheral gear 115 meshing with the planetary gear 280 is formed inside the case 10A. Then, as shown in FIGS. 12 (b) and 14 (a), a substantially ring-shaped corrugated portion 116 is formed on the upper portion of the inner peripheral gear 115 in a plan view. The corrugated portion 116 has a shape in which a portion having a small horizontal distance from the center of a circle passing through the center of the inner peripheral gear 115 and a portion having a large horizontal distance are alternately arranged to form a zigzag shape in a plan view. Specifically, it has a polygonal shape formed by connecting a large number of straight lines. Here, in the present embodiment, a portion having a large horizontal distance from the center of the circle passing through the center of the inner peripheral gear 115 abuts on a part of the carrier 260 with internal teeth, and the center of the circle passing through the center of the inner peripheral gear 115. The corrugated portion 116 is configured so that the portion having a small horizontal distance from the inner tooth does not come into contact with the carrier 260 with internal teeth. Further, a step 117 having a different height in the vertical direction of the case 10A is provided on the inner surface side surface of the flange portion 13 inside the case 10A. By providing the corrugated portion 116 and the step 117, for example, another member such as 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 as the code CD moves. Positioning can be facilitated and frictional resistance can be reduced. Since the carrier 260 with internal teeth in the present embodiment includes a planetary gear 280 as well as a rotating member, the rotation speed of the knurl 240 accompanying the movement of the cord CD in one direction is increased to impart resistance. It can also be said that it is a speed-increasing member that transmits to the RA. Here, the physical or virtual rotation axis refers to a case where the rotation axis of the rotating member is a physical axis, or a virtual axis having no physical axis (for example, weight holder 320 (FIG. 2, FIG. 2, FIG. It means the case of the vertical axis passing through the central point in the plan view of FIG. 3).

Further, as shown in FIG. 14, four grooves 118 are formed on the left and right inner side 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 the present embodiment, since the slider 220 has four protrusions 230, the case 10A is also provided with four grooves 118.

1-2-3 <Slider 220>
Next, the slider 220 will be described with reference to FIG. The slider 220 corresponds to a moving member that holds the idle roller 40 and the knurl 240 inside and moves together with the idle roller 40 and the knurl 240. The slider 220 has a top wall portion 221 and a rear side wall portion 222 and a front side wall portion 224 connected to the top wall portion 221 and a bottom wall portion 223 connected to each of the rear side wall portion 222 and the front side wall portion 224. Have.

The top wall portion 221 has a shape in which a pair of grooves are formed in a substantially rectangular shape. These pair of grooves are referred to as a first top wall groove 226 and a second top wall groove 227, respectively. The first top wall groove 226 and the second top wall groove 227 are linear grooves extending in the left-right direction, respectively, and are arranged in a straight line with each other.

The bottom wall portion 223 faces the top wall portion 221. In the present embodiment, the bottom wall portion 223 has substantially 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 formed in a straight line in the left-right direction are also formed in the bottom wall portion 223, and these pair of grooves are referred to as a first bottom wall groove 228 and a second bottom wall groove 229, respectively. 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 vertical direction. Therefore, when the slider 220 is viewed in a plan view, 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 large enough to accommodate the diameter of the shaft core 31. The width of the second top wall groove 227 and the second bottom wall groove 229 is large enough to accommodate the shaft core 41.

Further, the top wall portion 221 is provided with protrusions 230 at its four corners so as to project to the left and right of the top wall portion 221. As shown in FIG. 4, the protrusion 230 is housed in the support groove 114 of the case 10A, and is for supporting the slider 220 in a floating state inside the case 10A. That is, the slider 220 is held in a non-contact state with the carrier 260 with internal teeth located below.

Through holes 225 are formed in the front side wall portion 224 and the rear side wall portion 222. The through hole 225 penetrates the front side wall portion 224 and the rear side wall portion 222 in the front-rear direction at substantially the center in the width direction of the front side wall portion 224 and the rear side wall portion 222. The shape of the hole is arbitrary, but at least one cord CD can be inserted. Preferably, the shape is such that a plurality of cord CDs can be inserted in a vertically aligned state. In this embodiment, the shape is a substantially oval shape that is long in the vertical direction.

Further, as shown in FIG. 13B, the rear side wall portion 222 is formed with recesses 231 formed from the outer surface of the rear side wall portion 222 on both sides of the through hole 225. The shape of the recess 231 is arbitrary, and may be a shape cut out from the through hole 225 to the side surface side as shown in FIG. 13B, or may be a substantially circular or substantially rectangular recess. Further, in the present embodiment, the coil spring SP is arranged in the recess 231 on the left side, and one end of the coil spring SP protrudes from the recess 231. Then, when the braking device 1000 is assembled, it comes into contact with the inner wall of the case 10A and urges the slider 220 forward. In FIG. 13, the portion of the coil spring SP protruding from the recess 231 is omitted. Further, the coil spring SP may be arranged in the recess 231 on the right side. Further, the coil spring SP may be arranged in both the left and right recesses 231.

The size of the slider 220 having such a shape in the left-right direction is substantially the same as the distance between the inner walls in the width direction of the case 10A, and the size of the slider 220 in the front-rear direction is between the inner walls in the front-rear direction of the case 10A. It is made smaller than the distance. Therefore, when the slider 220 is arranged 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 is brought into the case 10A. On the other hand, movement is regulated in the width direction. 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-rear direction. That is, the through hole 225 is a hole for inserting the cord CD into the slider 220. On the other hand, with the slider 220 arranged in the space of the case 10A, a gap is generated in the front-rear direction between the slider 220 and the inner wall surface of the case 10A, and the slider 220 moves in the front-rear direction with respect to the case 10A. be able to. Further, with the slider 220 arranged in the space of the case 10A, the coil spring SP protruding from the recess 231 of the rear side wall portion 222 of the slider 220 presses the inner wall behind the case 10A. Therefore, with the slider 220 arranged in the space of the case 10A, the slider 220 is located on the front side and is pressed forward in the case 10A.

Here, the protrusion 230 of the slider 220 will be described in detail with reference to FIG. As shown in FIG. 14, when assembling the braking device 1000, the slider 220 is arranged so as to be located below the inside of the case 10A, and is relatively moved in the vertical direction so that the two are close to each other. Then, the protrusion 230 provided on the slider 220 is passed through the groove 118 provided inside the case 10A. In FIG. 14A, the groove 118 is emphasized in order to enhance the visibility. Then, as shown in FIG. 4, the case 10A and the slider 220 are brought close to each other until the protrusion 230 reaches the support groove 114. Then, the coil spring SP provided on the slider 220 comes into contact with the inner wall behind the case 10A, and the slider 220 is urged forward so that the protrusion 230 is located in front of the groove 118. Therefore, once the slider 220 is attached to the case 10A, it is possible to prevent the protrusion 230 from coming off the support groove 114. The groove 118 serves to pass the protrusion 230 not only when the braking device 1000 is assembled but also when it is disassembled. In this case, the slider 220 is moved rearward relative to the case 10A against the urging force of the coil spring SP, and when the protrusion 230 reaches the position of the groove 118, the slider 220 is moved with respect to the case 10A. It may be moved relatively downward.

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

1-2-4 <Idle roller 40, knurl 240 and pinion gear 50>
Next, the idle roller 40, the knurl 240, and the pinion gear 50 will be described with reference to FIGS. 3 and 15.

The idle roller 40 is composed of a roller portion 42 and a shaft core 41. Further, the idle roller 40 has a shaft core 41 parallel to the shaft core 31 of the knurl 240 and a roller portion 42 covering the outer peripheral surface of the shaft core 41. Therefore, the rotation axis of the knurl 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 knurl 240. The outer peripheral surface of the roller portion 42 of the idle roller 40 is in a state where the friction coefficient is higher than that of the flat surface of the metal. Further, both ends of the shaft core 41 are exposed from the roller portion 42.

One end of the shaft core 31 is inserted in the center of the knurl 240. A pinion gear 50 is inserted at the other end of the shaft core 31. The knurl 240 can be made of any material, for example stainless steel can be used.

The idle roller 40 and the knurl 240 are held inside the slider 220. Further, the pinion gear 50 is held outside the slider 220. Here, the positional relationship between the knurl 240, the slider 220, and the pinion gear 50 will be described with reference to FIG. FIG. 9 is a part of a cross-sectional view passing through the substantially center of the shaft core 31 when viewed from the left side surface of the braking device 1000 according to the present embodiment. As shown in FIG. 9, when the braking device 1000 is assembled, the knurl 240 and the pinion gear 50 sandwich the bottom wall portion 223 of the slider 220. Further, in the present embodiment, the pinion gear 50 is provided with a step 51 in order to reduce the contact area between the pinion gear 50 and the slider 220. As a result, when the knurl 240 and the pinion gear 50 rotate integrally via the shaft core 31, the sliding resistance between the pinion gear 50 and the slider 220 can be reduced. This makes it possible to smooth the rotation operation. In order to reduce the resistance, in the present embodiment, the washer 241 (see FIGS. 2 and 3) is bitten to the shaft core 31 on the lower side of the pinion gear 50.

1-2-5 <Carrier 260 with internal teeth and planetary gear 280>
Next, the carrier 260 with internal teeth and the planetary gear 280 will be described with reference to FIGS. 2 and 15. In this embodiment, the carrier 260 with internal teeth has a substantially donut shape in a plan view. The carrier 260 with internal teeth includes a flange 262 that projects outward from the cylindrical portion 264 in a plan view.

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

A planetary gear 280 is rotatably supported on each of the support shafts 263. The planetary gear 280 meshes with the sun gear 323, which will be described later, and the inner peripheral gear 115 provided inside the case 10A. Then, it is possible to revolve around the central portion of the internal gear 261. Therefore, the rotation of the pinion gear 50 is transmitted to the internal gear 261 to rotate the carrier with internal teeth 260, and the carrier 260 with internal teeth is rotatably supported by the support shaft 263 provided on the flange 262 of the carrier 260 with internal teeth. The rotation of the planetary gear 280 makes it possible to accelerate the rotation caused by the pinion gear 50. Further, the planetary gear 280 is provided with a step 281. Due to such a step, it is possible to avoid contact with other members.

1-2-6 <Weight holder 320 with sun gear and weight 340>
Next, the weight holder 320 with the sun gear and the weight 340 will be described with reference to FIGS. 2 and 15. The weight 340 is an example of a centrifugal expansion portion that is placed on a base 70 in the case 10A and a centrifugal force is applied to the outside in the radial direction by a rotation input from a braking target. The weight holder 320 with a sun gear is formed with convex portions 321 and concave portions 322 arranged alternately toward the outside of the ring-shaped ring portion 324. Here, the convex portion 321 is a member that comes into contact with the side surface of the weight 340 when the weight holder 320 with a sun gear rotates. As shown in FIG. 2, a sun gear 323 meshing with the planetary gear 280 is provided on the outer outer peripheral surface of the ring portion 324 so that the rotation axis faces substantially perpendicular to the extending direction of the convex portion 321. Be done. Then, a weight 340 is arranged in each recess 322. That is, it can be said that the weight holder 320 with the sun gear is a member that holds the weight 340 in each of the concave portions 322 with the convex portion 321 as a boundary when the braking device 1000 is assembled. The number of weights 340 is arbitrary, but it is preferable that the weights are evenly spaced from the viewpoint of balance during rotation. In this embodiment, eight weights 340 are used as an example. Therefore, eight convex portions 321 and eight concave portions 322 are also provided. That is, the recesses 322 are arranged at equal intervals and equidistant from the rotation center of the weight holder 320 with the sun gear.

In the present embodiment, each weight 340 is provided with a protrusion 341 on the base 70 side. As a result, a step is provided on at least a part of the contact surface between the weight 340 and the base 70. Therefore, it is possible to reduce the resistance at the time of contact with the base 70. The number of protrusions 341 is arbitrary, but in the present embodiment, four protrusions 341 are provided as an example.

During rotation caused by the pinion gear 50, the weight 340 moves in a direction away from the center of the internal gear 261 due to centrifugal force, and abuts on the inner peripheral wall of the case 10A to provide resistance as a centrifugal brake to rotation. It is to be given. Therefore, the inner peripheral wall of the case 10A, the weight holder 320 with the sun gear, and the weight 340 can act as a resistance imparting portion.

When assembling the braking device 1000, the carrier 260 with internal teeth and the weight holder 320 with sun gears are assembled via the plate 300. Specifically, the cylindrical portion 264 of the carrier 260 with internal teeth is assembled so as to be inserted into the ring portion 324 of the weight holder 320 with a sun gear. Therefore, 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 a function of preventing the planetary gear 280 from tilting and preventing interference between the planetary gear 280 and the weight 340. The weight 340 is preferably formed as thin as possible in order to reduce the thickness of the entire braking device 1000. Further, the plate 300 is preferably made of metal because it is formed thin, but if technically possible, the plate 300 may be formed of resin. In this case, it may be integrally formed with the sun gear 323.

1-2-7 <Base 70>
Next, the base 70 will be described with reference to FIGS. 2, 3, 5 (b) and 15. As shown in FIGS. 2 and 3, a columnar portion 708 that is bulkier than the surroundings and has a concave lower side is provided at substantially the center of the base 70. Then, as shown in FIGS. 2 and 5B, a first base groove 706, a first guide wall 706A, a second base groove 707, and a second guide wall 707A are provided on the upper surface of the cylindrical portion 708.

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 core 31 inserts the first base groove 706 and comes into contact with the first guide wall 706A formed on the edge thereof. Similarly, 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 core 41 inserts the second base groove 707 and comes into contact with the second guide wall 707A formed on the edge thereof.

Although the columnar portion 708 is not essential, by providing a columnar portion 708 or the like to dent the lower side, the shaft core 31 and the lower end of the shaft core 41 become a mounting surface on which the braking device 1000 is mounted. It is possible to prevent contact and appropriately insert the shaft core 31 and the lower ends of the shaft core 41.

Further, the base 70 is provided with two first engaging plate portions 701A at both ends of the left and right side surfaces. Then, two second engaging plate portions 701B are provided at both ends of the front side surface, and one second engaging plate portion 701B is provided at substantially the center of the rear side surface. The first engaging plate portion 701A engages with the first engaging groove 111A provided in the case 10A. Further, the second engaging plate portion 701B engages with the second engaging groove 111B provided in the case 10A. As a result, the case 10A and the base 70 are engaged with each other to form a housing.

Further, as shown in FIGS. 3, 5 (b), 15 and the like, on the outside of the bottom surface of the base 70, a mounting cylinder 702 used when arranging the braking device 1000 in the head box of the shielding device is provided. Provided. For example, by fitting the mounting cylinder 702 into a member such as a shaft provided in the head box, the braking device 1000 can be stably arranged in the head box.

1-3 <Assembly configuration>
Next, a state in which each of these members is assembled will be described with reference to FIGS. 4 to 8. FIG. 4 is an assembly drawing of the braking device 1000 configured by combining these members. As shown in FIG. 4, the appearance of the braking device 1000 includes a housing to which the case 10A and the base 70 are connected, and an aligning member 200 arranged so as to cover the case 10A from above. As shown in FIGS. 2 and 3, such assembly is performed in a state where the central axes of the members are overlapped in the vertical direction. Specifically, the carrier 260 with internal teeth and the weight holder 320 with a sun gear holding the weight 340 are assembled via the plate 300. At this time, the planetary gear 280 provided on the carrier 260 with internal teeth and the sun gear 323 provided on the weight holder 320 with sun gears are made to mesh with each other.

Then, the axis 31 is slid to 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 knurl 240 is located inside the slider 220, and the pinion gear 50 is located outside the slider 220. Further, the shaft core 41 is slid into the second top wall groove 227 and the second bottom wall groove 229 while being moved in the horizontal direction. At this time, the roller portion 42 is positioned 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 provided on the carrier 260 with internal teeth mesh with each other.

After that, the base 70 is arranged under these members, and as shown in FIG. 14, the case 10A is covered from above so that the protrusion 230 of the slider 220 passes through the groove 118 of the case 10A. At this time, it is confirmed that the coil spring SP provided on the slider 220 comes into contact with the inner peripheral wall of the case 10A, the slider 220 is urged forward, and the protrusion 230 does not fall out of the support groove 114. Then, the first engaging groove 111A and the first engaging groove 111B provided in the case 10A and the first engaging plate portion 701A and the second engaging plate portion 701B provided in the base 70 are engaged with each other to form a case. Fix 10A and base 70.

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

The braking device 1000 thus assembled is shown in FIG. Then, when the assembly of the braking device 1000 is completed, the first cord CD is arranged so as to be outside the front wall portion 205 of the alignment member 200 and above the first front groove 201. Then, the second cord CD is inserted into the first front groove 201 via the first front cord insertion portion 201A of the alignment member 200. Then, the third cord CD is inserted into the second front groove 202 via the second front cord insertion portion 202A.

Then, these cord CDs are passed through the guide grooves 113 provided in the front and rear of the case 10A and the through holes 225 provided in the front and back of the slider 220.

Then, among the cord CDs, 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 to the outside from the first rear groove 203 via the first rear cord insertion portion 203A provided in the rear wall portion 206 of the alignment member 200. Then, the third cord CD is passed to the outside from the second rear groove 204 via the second rear cord insertion portion 204A. As a result, the state shown in FIGS. 4 (a) and 4 (b) is obtained.

FIG. 4C is a left side view of the braking device 1000, that is, a side view seen from the arrow X direction of FIG. 4A. As shown in FIG. 4C, in the braking device 1000, the case 10A, the alignment member 200, and the base 70 can be visually recognized from above in the side view. Further, it can be seen that the protrusion 230 is supported by the support groove 114.

As shown in FIG. 5A, the braking device 1000 can be visually recognized in the order of the case 10A, the aligning member 200, and a part of the base 70 in the plan view thereof. Here, as shown in FIGS. 4A, 4B and 5A, the upper end of the shaft core 31 is provided in the case 10A from the first top wall groove 226 provided in the slider 220. The first top wall groove 16 is inserted and exposed to the outside of the case 10A. Similarly, the upper end of the shaft core 41 is exposed to the outside of the case 10A by inserting the second top wall groove 17 provided in the case 10A through the second top wall groove 227 provided in the slider 220.

Then, the first guide wall 16A provided on the edge of the first top wall groove 16 comes into contact with the shaft core 31, and the second guide wall 17A provided on the edge of the second top wall groove 17 hits the shaft core 41. I'm in contact.

Further, as shown in FIG. 5B, in the bottom view of the base 70, the lower end of the shaft core 31 inserted through the first base groove 706 and the shaft core 41 inserted through the second base groove 707. You can see the bottom edge of. The surface on which the mounting cylinder 702 is provided may be configured such that the shaft core 31 and the lower ends of the shaft core 41 are covered from the outside by covering the top of the cylindrical portion 708 with a surface.

1-3-2 <Internal structure in assembled state>
Next, the internal structure in the assembled state will be described with reference to FIGS. 6 to 8. FIG. 6 is a perspective view in a state where the alignment member 200 and the case 10A are removed from the state of FIG. As shown in FIG. 6, the shaft core 31 and the shaft core 41 project above the slider 220. Further, the movement of the shaft core 31 is restricted in the width direction of the slider 220 in the first top wall groove 226. Similarly, the movement of the shaft core 41 is restricted in the width direction of the slider 220 in the second top wall groove 227. The code CDs (not shown) are inserted in the front-rear direction of the slider 220 in a state of being vertically aligned in the through holes 225 of the slider 220.

FIG. 7 is a perspective view in a state in which the slider 220 is further removed from the state of FIG. The code CD (not shown) is inserted in front of and behind the braking device 1000 in a state of being sandwiched between the knurl 240 and the roller portion 42. Further, the pinion gear 50 and the internal gear 261 are in mesh with each other. Therefore, when tension is applied to the cord CD, a frictional force is generated between the cord CD and the knurl 240, and when the pinion gear 50 rotates integrally with the knurl 240, the rotation of the pinion gear 50 is an internal gear. It is transmitted to 261. As a result, the internal gear 261 rotates, so that the support shaft 263 provided on the flange 262 revolves together with the carrier 260 with internal teeth. Along with this, the planetary gear 280 rotatably supported by the support shaft 263 starts to revolve while rotating.

FIG. 8 is a perspective view in a state in which the carrier 260 with internal teeth is further removed from the state of FIG. 7. As shown in FIG. 8, the planetary gear 280 and the sun gear 323 are in mesh with each other. Therefore, the rotation of the planetary gear 280 is transmitted to the sun gear 323, and the weight holder 320 with the sun gear starts to rotate. As a result, as shown in FIG. 15, the weight 340 held in the recess 322 of the weight holder 320 with the sun gear starts 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. This gives resistance to the rotation of the knurl 240.

Next, the relative positions between the members in the assembled state will be described in more detail with reference to FIGS. 16 and 17. FIG. 16 is a cross-sectional view taken along the line AA of FIG. 4 (c). As shown in FIG. 16, the pinion gear 50 centered on the shaft core 31 and the internal gear 261 provided on the carrier 260 with internal teeth are in mesh with each other. Further, the rotation of the internal gear 261 is configured to be transmitted to the planetary gear 280 via the support shaft 263 of the carrier 260 with internal teeth. Then, the planetary gear 280 meshes with the sun gear 323 provided on the weight holder 320 with the sun gear and the inner peripheral gear 115 provided inside the case 10A. Therefore, due to the rotation caused by the pinion gear 50, the planetary gear 280 revolves around the center of the internal gear 261 in the space formed between the sun gear 323 and the inner peripheral gear 115. It will be possible.

FIG. 17 is a cross-sectional view taken along the line BB of FIG. 5 (a). As shown in FIG. 17, in the present embodiment, the cross-sectional view of the cut portion along the BB line is substantially symmetrical with respect to the mounting cylinder 702. Then, the shaft core 31 and the shaft core 41 project from the upper end of the case 10A and the lower end of the base 70. In the present embodiment, the upper ends of the first guide wall 16A and the second guide wall 17A are substantially the same height as the upper ends of the shaft core 31 and the shaft core 41, respectively.

The knurl 240 and the roller portion 42 are located inside the slider 220. Further, the pinion gear 50 is located outside the slider 220 with the slider 220 sandwiched together with the knurl 240. Further, the pinion gear 50 and the internal gear 261 are in mesh with each other.

Then, from the upper side of the case 10A to the collar portion 13, it is covered with the aligning member 200. Further, the case 10A is engaged with the base 70 at the lower end thereof. A weight 340 is held on the upper part of the base 70. Here, in the present embodiment, since the weight 340 is detachable, the required braking force can be adjusted according to the number or type of the weight 340. That is, when a large braking force is required, the number of weights 340 may be increased, or other higher density weights may be held in the weight holder 320 with a sun gear. On the other hand, if a small braking force is sufficient, the number of weights 340 may be reduced. From the viewpoint of stability during rotation, the weights 340 are preferably arranged symmetrically on a surface held by the weight holder 320 with a sun gear. In the present embodiment, the protrusion 341 provided on the weight 340 and the bottom surface of the base 70 come into contact with each other to reduce the resistance between the weight 340 and the base 70 during rotation.

1-4 <Operation>
Next, the operation of the braking device 1000 according to the present embodiment will be described with reference to FIG. FIG. 18A shows a state in which no tension is applied to the cord CD (steady state), and FIG. 18B shows a state in which tension is applied to the cord CD and the cord CD is sandwiched between the lorlet 240 and the roller portion 42. (Pinched state), FIG. 18 (c) is a diagram summarizing the rotation directions of each member when the state changes from FIG. 18 (a) to FIG. 18 (b). Both FIGS. 18A and 18B are cross-sectional views taken along the line AA of FIG. 4C, similarly to FIG. Here, for convenience of explanation, the outer circumference of the roller portion 42, which does not appear in the cross-sectional view, is displayed so as to be superimposed on the periphery of the shaft core 41, and the outer circumference of the knurl 240 is displayed so as to be superimposed on the periphery of the shaft core 31. Although the outer circumference of the knurl 240 is not strictly circular, it is shown in an approximate circular shape for the sake of simplification of description.

As shown in FIG. 18A, in the steady state, as described above, the coil spring SP comes into contact with the inner wall behind the case 10A and presses the slider 220 forward. Therefore, the slider 220 is located in front of the case 10A. Therefore, the position is regulated by the shaft core 31 whose position is regulated by the first top wall groove 226 and the first bottom wall groove 228 of the slider 220, and the position is regulated by the second top wall groove 227 and the second bottom wall groove 229. The shaft core 41 and the shaft core 41 move forward together with the slider 220. Further, the first top wall groove 16 and the second top wall groove 17 provided in the case 10A held on the upper part of the slider 220 are closer to each other toward the front. Similarly, the distance between the first base groove 706 and the second base groove 707 provided in the base 70 decreases toward the front. Therefore, the distance between the roller portion 42 rotatably supported by the shaft core 41 and the knurl 240 rotatably supported by the shaft core 31 is also reduced. That is, the first top wall groove 16 and the first base groove 706 function as a regulating groove that regulates that the shaft core 31 of the knurl 240 is movably fitted and the knurl 240 does not move along the groove. Similarly, the second top wall groove 17 and the second base groove 707 serve as a regulating groove that regulates that the shaft core 41 of the roller portion 42 is movably fitted and the roller portion 42 does not move along the groove. Function. Further, since the first top wall groove 16 and the first base groove 706 are formed concentrically with the center point of the inner peripheral surface of the carrier 260 with internal teeth in a plan view, the axial core 31 moves in each groove. Even so, the pinion gear 50 can continue to mesh with the internal gear 261 provided on the carrier 260 with internal teeth.

As described above, when the distance between the knurl 240 and the roller portion 42 becomes smaller, the knurl 240 is pressed by the roller portion 42, and the code CD is sandwiched between the knurl 240 and the roller portion 42. That is, in the present embodiment, the coil spring SP also functions as an urging member that constantly urges the knurl 240 so that the knurl 240 is pressed against the roller portion 42.

Then, it is assumed that tension is applied to the code CD in the direction (forward) of the arrow D1 in the braking device 1000 in the steady state. Then, the knurl 240 rotates counterclockwise and the roller portion 42 rotates clockwise due to the frictional force generated between the cord CD and the cord CD. Then, due to the rotation of the knurl 240, the pinion gear 50 that shares and is fixed with the same shaft core 31 also rotates (rotates) in the same direction (counterclockwise) as the knurl 240. At this time, as shown in FIG. 18B, the shaft core 31 and the shaft core 41 move forward in a plan view, are close to each other in the left-right direction, and sandwich the cord CD by the knurl 240 and the roller portion 42. The force of attachment becomes stronger, and the knurl 240 reliably rotates as the code CD moves. Then, since the pinion gear 50 meshes 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. As a result, the carrier 260 with internal teeth also rotates (rotates) counterclockwise together with the internal gear 261. Therefore, the planetary gear 280 provided on the carrier 260 with internal teeth also rotates (revolves) counterclockwise. Here, since the planetary gear 280 meshes with the sun gear 323 and the inner peripheral gear 115 fixed by the case 10A, it revolves counterclockwise while rotating in the direction opposite to the revolution direction (clockwise). Will be done. Therefore, the sun gear 323 that meshes with the planetary gear 280 inside the planetary gear 280 rotates (rotates) in the opposite direction (counterclockwise) to the rotation of the planetary gear 280. At this time, the planetary gear 280 accelerates the rotation of the sun gear 323. As a result, the weight 340 held by the weight holder 320 with the sun gear that rotates together with the sun gear 323 also starts to rotate. As already described, the inner peripheral gear 115 that meshes with the planetary gear 280 on the outside of the planetary gear 280 does not rotate even when the planetary gear 280 rotates because the case 10A and the base 70 are fixed.

Then, as shown in FIG. 18B, when the knurl 240 and the roller portion 42 approach the limit (sandwiched state), the knurl 240 continues to rotate but stops moving along the internal gear 261 of the knurl 240. .. At this time, the rotation of the other members due to the rotation of the knurl 240 is continued. Then, the weight 340 comes into contact with the inner peripheral wall of the case 10A due to the centrifugal force, so that a resistance force is generated against rotation. That is, as the moving speed of the code CD increases, the rotational speed increases, which increases the centrifugal force. Then, as the centrifugal force increases, the weight 340 comes into contact with the inner peripheral wall of the case 10A more strongly, and the resistance force increases. As a result, the moving speed of the code CD (falling speed of the solar radiation shielding member) can be suppressed. Here, when the tension applied to the cord CD is substantially constant (for example, when the solar shielding member suspended so as to be able to move up and down on the cord CD on the front side of the braking device 1000 falls freely), the tension is added to the cord CD. The moving speed of the cord CD becomes substantially constant where the tension to be applied, the weight 340, and the resistance force due to the inner peripheral wall of the case 10A are balanced. Therefore, the braking device 1000 functions as a rotary damper for the movement of the cord CD, and the solar radiation shielding member can be slowly lowered.

Regarding the change in the pinched state from the steady state to the pinched state described above, FIG. 18 summarizes the rotation directions of each member (for the pinion gear 50, the front-rear direction and the tightening direction in a plan view are also included). (C).

On the other hand, when tension is applied to the cord CD in the direction opposite to the arrow D1 (rearward), the knurl 240 and the roller portion 42 rotate in the opposite direction to the above. As a result, the shaft core 31 and the shaft core 41 move along the first top wall groove 16 and the second top wall groove 17 so as to be separated from each other. Then, the pinching force of the knurl 240 with respect to the cord CD is weakened, and the cord CD can be pulled with a weak force. Therefore, when the braking device 1000 is provided in the head box, in FIG. 18, the direction in which tension is applied to the cord CD in the front is the direction in which the solar radiation shielding member is lowered, and the direction in which tension is applied to the cord CD in the rear is the direction in which the solar radiation shielding member is applied. It is preferable to use the rising direction of.

Next, with reference to FIG. 19, the movement of the slider 220 when the state changes between the steady state and the pinched state will be described. FIG. 19 (a) corresponds to FIG. 18 (a), and FIG. 19 (b) corresponds to FIG. 18 (b).

When changing from the steady state of FIG. 19 (a) to the sandwiched state of FIG. 19 (b), the shaft core 41 and the roller portion 42, and the shaft core 31 and the knurl 240 are shown in the figure due to the frictional force with the cord CD. Move in front of. At this time, since the shaft core 41 is in contact with the second top wall groove 227 and the second bottom wall groove 229, the second top wall groove 227 and the second bottom are moved as the shaft core 41 moves forward. A force is applied forward to the wall groove 229. Further, since the shaft core 31 is in contact with the first top wall groove 226 and the first bottom wall groove 228, the first top wall groove 226 and the first bottom wall are moved as the shaft core 31 moves forward. A force is applied forward to the groove 228. Therefore, when the shaft cores 31 and 41 move forward by Δ, the slider 220 also moves forward by Δ.

Next, with reference to FIG. 20, a predetermined pinching position in the initial state (before wear) of the pair of pinching members (roller portion 42 and knurl 240) and a pinching position after wear will be described. In the present embodiment, the roller portion 42 and the knurl 240 are rotating bodies that rotate around the shaft 41 and the shaft 31, respectively.

As shown in FIG. 20, in the initial state of the knurl 240, that is, in the state before the diameter becomes smaller due to wear, the knurl 240 and the roller portion 42 move from the release position to the first top wall groove 16 as the cord CD moves. And move forward along the second top wall groove 17. That is, at least one of the pair of sandwiching bodies is configured to move in a predetermined movement locus (double-headed arrow in the figure). Here, the movement locus of the sandwiched body along the regulation groove (the first top wall groove 16 and the first base groove 706 and the second top wall groove 17 and the second base groove 707 (see FIG. 5)). It can be said that it is a locus of movement. As a result, the knurl 240 and the roller portion 42 sandwich the cord CD. The positions of the knurl 240 and the roller portion 42 at this time are predetermined pinching positions.

At this time, the movement locus extends beyond the predetermined pinching position. In other words, the regulatory groove extends beyond such pinching positions. Further, the movement locus extends in the direction toward the code CD. The movement loci of the knurl 240 and the roller portion 42 are configured so that their extension lines intersect each other. Further, the pinching position is a position separated from the end portion of the regulation groove on the approaching direction side (front side in FIG. 20) with respect to the cord CD. Then, when a part of the knurl 240 or the roller portion 42, particularly the contact portion with the cord CD is scraped due to wear and the diameter of the knurl 240 or the roller portion 42 becomes smaller, the predetermined pinching position of the regulation groove (initial). The knurl 240 and the roller portion 42 sandwich the cord CD by holding the shaft 31 and the shaft 41 in the regulation groove within a range exceeding the pinching position in the state). As shown in FIG. 20, the pinching position after wear is a position separated by d from the predetermined pinching position to the front side in the drawing.

In this way, even if the diameter of the knurl 240 or the roller portion 42 becomes smaller due to wear due to the movement locus (regulating groove) extending beyond the pinching position of the knurl 240 or the roller portion 42 in the initial state. , The code CD can be properly sandwiched.

Further, even when the cord diameter is reduced due to wear of the cord, the same effect is obtained.

2. Second Embodiment Next, the motion conversion unit according to the second embodiment of the present invention will be described with reference to FIGS. 21 to 23. As shown in FIG. 21, in the second embodiment, the knurl 240 and the roller portion 42 are connected via the respective shaft cores 31 and 41. Here, such a connecting method is arbitrary, and for example, as shown in FIG. 21 (a), a pair of plates 800 may be used. Here, in the second embodiment, the plate 800 is substantially rectangular, and for example, a metal plate 800 can be used. Further, a through hole 801 is provided at a position corresponding to the shaft core 31 and the shaft core 41 of the plate 800, and the knurl 240 and the roller portion 42 are connected by inserting the shaft core 31 and the shaft core 41 into the through hole 801. be able to. When the string-shaped member 900 is used, as shown in FIG. 22, the knurl 240 and the roller portion 42 rotate in opposite directions when the cord CD is moved, so that the string-shaped member 900 is crossed. Here, FIG. 22 is a schematic view of a state in which the member of FIG. 21B sandwiches the cord CD as viewed from the direction of arrow Z.

Further, as shown in FIG. 21B, the knurl 240 and the roller portion 42 may be connected by using a string-shaped member 900 instead of the plate 800.

Then, as shown in FIG. 23, such a member is provided inside the case 10B so as to sandwich the cord CD between the knurl 240 and the roller portion 42. Here, in FIG. 23, in order to improve visibility, a mode in which the string-shaped member 900 in FIG. 21B is used will be described. Further, it is assumed that the gravity g acts in the direction indicated by the arrow g in FIG. 23. For convenience of explanation, the direction of the arrow g is downward, and the direction opposite to the arrow g is upward.

Further, the case 10B is provided with a first side wall hole 119A at a position corresponding to the shaft core 31. The first side wall hole 119A is an oval shape that is inclined toward the front. These shapes are not particularly limited and can be appropriately designed. Here, in the second embodiment, the first side wall hole 119A corresponds to the regulation groove and extends beyond the pinching position of the first pinching member (knurl 240) in the initial state. Note that, in FIG. 23B, the predetermined pinching position is indicated by a broken line circle, and the following description describes the operation after the sandwiching body is worn. Further, the double-headed arrow in FIG. 23B represents the movement locus of the sandwiched body.

The shaft core 31 is movable along the first side wall hole 119A. Here, the knurl 240 is a roller provided at a position where it can come into contact with the cord CD and can move in the vertical direction. Here, in the first side wall hole 119A, an inner peripheral surface is formed by the pinching guide slope 119a, the release guide slope 119b, the pinch side regulation surface 119c, and the release side regulation surface 119d.

Further, inside the case 10B, a support column 92 is fixed at a position facing the knurl 240 with the cord CD sandwiched and in front of the knurl 240.

First, when tension is applied to the cord CD in the direction of arrow D2 from the state shown in FIG. 23A, the knurl 240 moves into the first side wall hole 119A in the direction of arrow D3 due to the frictional force generated between the cord CD and the cord CD. Move down along. At this time, the movement locus of the knurl 240 is along the first side wall hole 119A. Further, as shown in FIG. 23 (b), the movement locus extends beyond a predetermined pinching position.

As shown in FIG. 23 (b), such a position is defined as a first position which is a lower position in the movable direction having a vertical component. In such a state, since the distance between the knurl 240 and the support column 92 in the vertical direction is small, the cord CD bends and becomes a pinched state. That is, the support column 92 functions as a second sandwiching member located so as to sandwich the knurl 240 and the cord CD. Further, the roller portion 42 functions as an auxiliary roller that moves in conjunction with the knurl 240.

Here, when the shaft core 31 reaches the front limit of the movable range in the pinched state, the knurl 240, which has been substantially translated, starts rotating (clockwise in the drawing). Then, as in the third embodiment, the rotation of the shaft core 31 may be output to the resistance applying unit RA that generates a resistance force with the movement of the cord CD. At this time, when the cord CD moves forward, the rotation is transmitted to the resistance applying portion RA, but when the cord CD moves backward, the rotation is not transmitted to the resistance applying portion RA, so that the knurl 240 or the knurl 240 A one-way clutch may be provided between the resistance applying portion RA and the resistance applying portion RA. Here, the resistance applying portion RA may be provided inside or outside the case 10B, or may be provided inside the knurl 240.

On the other hand, when tension is applied to the cord CD in the direction opposite to the arrow D2, the operation in the opposite direction to the above operation occurs, so that the distance between the knurl 240 and the support column 92 in the vertical direction is separated, and the pinching force with respect to the cord CD is weakened. It becomes.

Then, as shown in FIG. 23A, the shaft core 31 is located at an upper position in the movable direction (oblique direction in FIG. 23) having a vertical component of the first side wall hole 119A against gravity g. Move to position. Such a state is called a free movement state. In the free movement state, the cord CD is released in the non-bent state. Then, the free movement of the code CD can be permitted.

In addition, instead of the shaft core 31 and the knurl 240, and the shaft core 41 and the roller portion 42, a column that does not rotate can be used.

As described above, also in the second embodiment, the movement locus (regulatory groove) extends beyond the pinching position of the knurl 240 or the roller portion 42 in the initial state, so that the knurl 240 or the roller portion 42 is worn out. Even when the diameter is reduced, the cord CD can be properly sandwiched.

3. 3. Third Embodiment Next, another motion conversion unit according to the third embodiment of the present invention will be described with reference to FIG. 24. As shown in FIG. 24, in the case 10C according to the third embodiment, a storage space 93 slightly larger than the diameter of the knurl 240 is formed. Here, the accommodation space 93 has a shape that is a combination of an arc shape and a semi-linear shape in a cross-sectional view. Therefore, the knurl 240 can move freely in the accommodation space 93. Further, in the accommodation space 93, a pinch guide slope 93a and a release side regulation surface 93d are formed.

Then, a shaft core 31, a knurl 240, a support column 92, two output shafts 95, and an endless belt 94 are arranged inside the case 10C. Further, the case 10C is provided with a first side wall hole 119B at a position corresponding to the shaft core 31. Here, in the third embodiment, the first side wall hole 119B corresponds to the regulation groove and extends beyond the pinching position of the first pinching member (knurl 240) in the initial state. In FIG. 24B, the predetermined pinching position is indicated by a broken line circle, and the following description describes the operation after the sandwiching body is worn. Further, the double-headed arrow in FIG. 24B represents the movement locus of the sandwiched body, and the knurl 240 is provided so as to slightly contact the code CD in the free movement state.

The knurl 240 is provided so as to sandwich the cord CD with the roller portion 42. Then, the endless belt 94 is stretched on the two output shafts 95. The endless belt 94 is configured so that the endless belt 94 can rotate by applying a resistance force due to the rotation of the knurl 240. Alternatively, if possible, the surface of the endless belt 94 may be shaped so as to mesh with the surfaces of the knurl 240 and the output shaft 95. Further, the output shaft 95 is configured to output its own rotation to a resistance applying unit that generates a resistance force with the movement of the code CD. The output shaft 95 and the endless belt 94 are configured so that the endless belt 94 is substantially in line with the half-straight portion of the accommodation space 93.

First, when tension is applied to the cord CD in the direction of arrow D4 from the state shown in FIG. 24 (a), the knurl 240 rotates in the direction of arrow D5 due to the frictional force generated between the cord CD and the cord CD, and the accommodation space is accommodated. It moves in the direction approaching the endless belt 94 via the half-straight portion of 93 (first position). At this time, the movement locus of the knurl 240 is along the first side wall hole 119A. Further, as shown in FIG. 24B, the movement locus extends beyond a predetermined pinching position. As shown in FIG. 24B, in such a state, since the distance between the knurl 240 and the support column 92 in the vertical direction is small, the cord CD bends and becomes a pinched state. That is, the support column 92 functions as a second sandwiching member located so as to sandwich the knurl 240 and the cord CD.

In the sandwiched state, the rotation of the output shaft 95 may be output to the resistance applying portion RA as in the third embodiment. That is, the frictional force acting between the knurl 240 and the endless belt 94 causes the endless belt 94 to rotate in the direction opposite to the arrow D5 (counterclockwise) with respect to the output shaft 95. As a result, the output shaft 95 also rotates (rotates) in the same direction (counterclockwise) as the endless belt 94. This rotation is output to the resistance applying unit RA. In such a configuration, one of the output shafts 95 exerts the same function as the shaft core 31 in the third embodiment (transmission of rotation to the resistance imparting portion RA). At this time, when the cord CD moves forward, the rotation is transmitted to the resistance applying portion RA, but when the cord CD moves backward, the rotation is not transmitted to the resistance applying portion RA, so that the knurl 240 and the resistance applying portion RA are transmitted. A one-way clutch may be provided between the two.

On the other hand, when tension is applied to the cord CD in the direction opposite to the arrow D4, the operation in the opposite direction to the above operation occurs, so that the distance between the knurl 240 and the support column 92 in the vertical direction is separated, and the pinching force with respect to the cord CD is weakened. It becomes.

Then, as shown in FIG. 24A, the shaft core 31 moves to a second position, which is a position away from the endless belt, against the gravity g. Such a state is called a free movement state. In the free movement state, the cord CD is released in the non-bent state. Then, the free movement of the code CD can be permitted.

It should be noted that the shaft core and the roller portion can be used instead of the support column 92.

As described above, also in the third embodiment, even when the diameter of the knurl 240 becomes smaller due to wear due to the movement locus (regulating groove) extending beyond the pinching position in the initial state of the knurl 240. The cord CD can be properly sandwiched.

4. Fourth Embodiment Next, the motion conversion part according to the fourth embodiment of the present invention will be described with reference to FIG. 25. The fourth embodiment is a modification 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 core 31 and the knurl 240 are configured to descend downward using the gravity g, and it can be said that the gravity g is used as the urging member. .. On the other hand, in the fourth embodiment, as shown in FIG. 25, the shaft core 31 is connected to the fixed shaft 160 by the connecting member 170. Here, as the connecting member 170, for example, the plate 800 of FIG. 21 can be used. Then, the spring 150 is attached to the connecting member 170. As a result, the connecting member 170 is urged in the arrow g direction around the fixed shaft 160, thereby urging the shaft core 31 and the knurl 240 in the arrow g direction.

Further, also in the fourth embodiment, as in the third embodiment, the first side wall hole 119A corresponds to the regulation groove and extends beyond the pinching position in the initial state of the first pinching member (knurl 240). .. In addition, in FIG. 25B, a predetermined pinching position is indicated by a broken line circle, and the following description describes the operation after the pinching body is worn. Further, the double-headed arrow in FIG. 25B represents the movement locus of the sandwiched body.

When tension is applied to the cord CD in the direction of arrow D6 from the free movement state shown in FIG. 25 (a), the shaft core 31 and the knurl 240 also move in the direction of arrow D6 due to the frictional force generated between the cord CD and the cord CD. At this time, the connecting member 170 rotates clockwise around the fixed shaft 160, so that the shaft core 31 and the knurl 240 move in the arrow g direction. As a result, the state shifts to the pinched state shown in FIG. 25 (b). At this time, the movement locus of the knurl 240 is along the first side wall hole 119A. Further, as shown in FIG. 25 (b), the movement locus extends beyond a predetermined pinching position.

When tension is applied to the cord CD in the direction opposite to that of the arrow D6, the cord CD shifts from the pinched state shown in FIG. 25 (b) to the free moving state shown in FIG. 25 (a).

That is, in the device using the member according to the fourth embodiment, the frictional force acting between the knurl 240 and the cord CD when the knurl 240 is located at the second position is such that the knurl 240 is located at the first position. The knurl 240 is configured to move so that it is sometimes less than the frictional force acting between the knurl 240 and the cord CD.

Further, as in the fourth embodiment, when the rotation of the shaft core 31 is output to the resistance applying unit RA that generates a resistance force with the movement of the cord CD, the device using the member according to the fourth embodiment is , The rotation of the knurl 240 due to the movement of the cord CD when the knurl 240 is located at the first position is output to the resistance applying unit RA, and the rotation of the cord CD is caused when the knurl 240 is located at the second position. It is configured so that the rotation of the knurl 240 is not output to the resistance applying portion RA.

<Modified example of the fourth embodiment>
Next, a modified example of the fourth embodiment will be described with reference to FIG. As shown in FIG. 26, the first sandwiching member (knurled 240) and the second sandwiching member (pinching plane 132s) form a pair of sandwiching members. The case 10B contains the knurl 240. That is, the case 10B includes at least one of the pair of sandwiching members. Here, the broken line CB in the figure represents the bottom surface of the case 10B. Further, the case 10B includes a first side wall hole 119A.

The sandwiching plane 132s allows the cord CD to move in the free moving state, and sandwiches the cord CD together with the knurl 240 in the sandwiched state. Further, the sandwiching plane 132s is a plane fixed before and after the movement of the knurl 240.

In the modified example of the fourth embodiment, as in the fourth embodiment, the first side wall hole 119A corresponds to the regulation groove and extends beyond the pinching position of the first pinching member (knurl 240) in the initial state. To do. Note that, in FIG. 26B, the predetermined pinching position is indicated by a broken line circle, and the following description describes the operation after the sandwiching body is worn. Further, the double-headed arrow in FIG. 26B represents the movement locus of the knurl 240 (axis core 31).

When tension is applied to the cord CD in the direction of arrow D7 from the free movement state shown in FIG. 26 (a), the shaft core 31 and the knurl 240 also move in the direction of arrow D7 due to the frictional force generated between the cord CD and the cord CD. At this time, the connecting member 170 rotates clockwise around the fixed shaft 160, so that the shaft core 31 and the knurl 240 move in the arrow g direction. As a result, the state shifts to the pinched state shown in FIG. 26 (b). At this time, the movement locus of the knurl 240 is along the first side wall hole 119A. Further, as shown in FIG. 26B, the movement locus extends beyond a predetermined pinching position.

When tension is applied to the cord CD in the direction opposite to that of the arrow D7, the cord CD shifts from the pinched state shown in FIG. 26 (b) to the free moving state shown in FIG. 26 (a).

That is, in the device using the member according to the modified example of the fourth embodiment, the frictional force acting between the knurl 240 and the cord CD when the knurl 240 is located at the second position is the first position of the knurl 240. The knurl 240 is configured to move so that it is less than the frictional force acting between the knurl 240 and the cord CD when located at.

Here, the sandwiching plane 132s can be the bottom surface 132 of the head box HB or the bottom surface of a member different from the head box HB.

Next, with reference to FIG. 27, it will be described in more detail that the cord CD can be appropriately sandwiched even when the diameter of the first sandwiching member (knurled 240) is reduced due to wear. Here, FIG. 27 corresponds to the pinched state shown in FIG. 26 (b).

As shown by the broken line in the figure, the knurl 240 before wear sandwiches the cord CD at a predetermined sandwiching position. The diameter of the knurl 240 after wear is smaller than that before wear. Therefore, at the pinching position before wear, there is a distance between the knurl 240 and the cord CD, and the cord CD cannot be properly pinched. However, since the movement locus (first side wall hole 119A corresponding to the regulation groove) extends beyond the pinching position of the knurl 240 in the initial state (before wear), the knurl 240 after wear has a knurl 240 before wear. The knurl 240 moves to a position beyond the pinching position, and the cord CD is pinched at the pinching position.

5. Fifth Embodiment Next, the braking device 5000 according to the fifth embodiment will be described with reference to FIGS. 28 to 34. As shown in FIG. 28 and the like, the braking device 5000 according to the present embodiment has a configuration in which the motion conversion unit DT and the resistance imparting unit RA are arranged in parallel. The outline of this embodiment will be described below.

As shown in FIGS. 28 to 30, the motion conversion unit DT is composed of a catch roller 32A composed of an inner cylinder 42A and an outer cylinder 240A, and a knurl 240 which is a so-called fixed pulley and is rotatably attached to the shaft core 31. It is composed of a catch roller 32B. Further, both the catch rollers 32A and 32B are provided in the case 440A. The cord CD is sandwiched by the rotational torque of the catch rollers 32A and 32B. Further, the cord CD is inserted into the motion conversion unit DT via the cord insertion hole 14A. The catch roller 32A will be described in more detail later.

The resistance applying portion RA is a so-called centrifugal governor, and when the weight 340A revolves around the damper shaft shown in FIG. 29 and the weight 340A moves to the outer diameter side due to centrifugal force, this and the case 10Aa come into contact with each other and rub against each other. Occurs to generate braking force. A rotation transmission mechanism (not shown) that rotates the weight 340A and a shaft core 31 of the catch roller 32B are connected, and when the catch roller 32B rotates, power related to such rotation applies resistance via the rotation transmission mechanism. It is transmitted to the part RA, which causes the weight 340A to revolve around the damper shaft. The number of weights 340A is not limited, and may be, for example, 2, 4, 8, or 16.

The catch roller 32A is configured such that the inner cylinder 42A and the outer cylinder 240A can rotate relative to each other and have sliding resistance during such relative rotation. As shown in FIG. 31, the outer circumference of the inner cylinder 42A is wrapped with the outer cylinder 240A. This will be described in detail later. A rotating shaft 31B and a guide shaft 31C are provided on the side surface of the inner cylinder 42A, and the case 440A is provided with a bearing of the rotating shaft 31B and a guide groove 31Ca for guiding the movement of the guide shaft 31C. That is, the catch roller 32A is configured to be rotatable around the rotation shaft 31B. The guide groove 31Ca is provided so that one side brings the catch roller 32A and the cord CD close to each other and the other side keeps the catch roller 32A and the cord CD away from each other. In other words, the guide groove 31Ca is formed so that the catch roller 32A moves away from the cord CD from one side to the other. Here, in the fifth embodiment, the guide groove 31Ca corresponds to the regulation groove and extends beyond the pinching position of the sandwiching body (catch roller 32A and catch roller 32B) in the initial state. In FIG. 30A, the predetermined pinching position is indicated by a broken line circle, and the following description describes the operation after the sandwiching body is worn.

According to such a structure in the guide groove 31Ca, when the cord CD moves in the braking direction indicated by the arrow in the figure in FIG. 30, the catch roller 32A rotates about the rotation shaft 31B, and the guide shaft 31C guides accordingly. It moves along the groove 31Ca. Here, in the guide groove 31Ca, an inner peripheral surface is formed by the pinching guide slope 31a, the release guide slope 31b, the pinching side regulation surface 31c, and the release side regulation 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. 30A. In such a state, when the cord CD is sandwiched between the catch rollers 32A and 32B and the cord CD further moves in the braking direction, the outer cylinder 240A in the catch roller 32A rotates with respect to the inner cylinder 42A, and the catch roller 32B has a shaft core. It rotates around 31. That is, the resistance force is applied by the resistance applying portion RA connected to the catch roller 32B, and the movement of the cord CD is braked.

Further, according to such a structure in the guide groove 31Ca, when the cord CD moves in the release direction indicated by the arrow in the figure in FIG. 30, the catch roller 32A rotates about the rotation shaft 31B, and the guide shaft 31C is accompanied by this. Moves along the guide groove 31Ca. At this time, the movement (rotation) locus of the catch roller 32A is along the guide groove 31Ca. Further, as shown in FIG. 30B, the movement locus extends beyond a predetermined pinching position. Since the same applies to the modified examples 1 to 3 of the fifth embodiment described later, the illustration and description will be omitted.

Then, 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. 30B. In such a state, the cord CD is not sandwiched between the catch rollers 32A and 32B or is merely sandwiched by a relatively weak force, and even if the cord CD further moves in the release direction, the catch roller 32B is pressed. The catch roller 32B does not rotate due to insufficient torque to rotate it. Therefore, the resistance force by the resistance imparting portion RA is not imparted.

In summary, in the process of changing from the state of FIG. 30 (a) to the state of FIG. 30 (b), the resistance force by the resistance imparting unit RA is given to the code CD, but in the state of FIG. 30 (b), the resistance is applied. The granting part RA does not work. Then, in the state of FIG. 30B, the distance between the outer cylinder 240A and the knurl 240 is larger than that in the state of FIG. 30A, so that the pinching force with respect to the cord CD is weakened. As a result, the braking force applied to the code CD is released, so that the code CD can move freely. Further, in the process of changing from the state of FIG. 30 (b) to the state of FIG. 30 (a), the resistance force by the resistance imparting portion RA is applied to the cord CD, and the cord CD is sandwiched in the state of FIG. 30 (a). As soon as it is worn, the resistance-imparting portion RA acts.

The sliding resistance of the inner cylinder 42A and the outer cylinder 240A during relative rotation may be such that the guide shaft 31C cannot rotate relative to the first position. In view of this, 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 by the press-fitting step of the inner cylinder 42A into the outer cylinder 240A as shown in FIG. 32 (a). In another example, as shown in FIG. 33, an elastic portion 42Aa is provided on the surface of the inner cylinder 42A, whereby a desired resistance force can be obtained. In yet another example, as shown in FIG. 34, the inner cylinder 42A is provided with a spring member 42Ab that applies pressure to the outer cylinder 240A, whereby a desired resistance force can be obtained. Further, it may be lubricated with highly viscous grease to stabilize the resistance.

<Modification 1 of the fifth embodiment>
Further, as shown in FIG. 35, the braking device 5100 according to the present modification is provided on the case 10Aa so that the guide shaft 31C is located at the first position except when the cord CD is moved in the release direction. A torsion spring 31Cb as a urging means in which the coil portion is wound around the rotating shaft 31B may be arranged between the fixed portion 441A and the guide shaft 31C, and the guide shaft 31C may be urged by the torsion spring 31Cb. .. Here, in this modification, the guide groove 31Ca corresponds to the regulation groove and extends beyond the pinching position of the pinching member (catch roller 32A) in the initial state. In FIG. 35A, the predetermined pinching position is indicated by a broken line circle.

As described above, even in this modified example, even if the diameter of the catch roller 32A becomes smaller due to wear due to the regulation groove extending beyond the pinching position in the initial state of the catch roller 32A, the cord CD can be used. It can be properly sandwiched.

<Modification 2 of the fifth embodiment>
Next, the braking device 5200 according to the second modification of the fifth embodiment will be described with reference to 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 applying unit RA are arranged in parallel in the left-right direction (direction perpendicular to the paper surface). .. The outline of this modification will be described below.

As shown in FIG. 36, the motion conversion unit DT includes a catch roller 32A composed of an inner cylinder 42A and an outer cylinder 240A, and a catch roller 32B composed of a knurl 240 rotatably attached to the shaft core 31. The inner cylinder 42A and the outer cylinder 240A have the same configurations as those in FIGS. 28 and 30, and are configured to be rotatable relative to each other. Further, a rotating shaft 31B and a guide shaft 31C are provided on the side surface of the inner cylinder 42A. Also in this modification, the catch roller 32A is configured to be rotatable around the rotation shaft 31B. Further, the guide groove 31Ca is provided on the side surface of the case 440B at a position where the catch roller 32B can change the state between the state in which the cord CD is sandwiched and the state in which the cord CD is released. Here, in this modification, the sandwiched body is configured by the catch roller 32A and the catch roller 32B. Further, in this modification, the guide groove 31Ca corresponds to the regulation groove and extends beyond the pinching position of the sandwiching body (catch roller 32 and catch roller 32BA) in the initial state. In FIG. 36A, the predetermined pinching position is indicated by a broken line circle.

Then, in this modification, the pinion gear 50B is provided on the side surface of the outer cylinder 240A. The pinion gear 50B has a rotation axis in the direction perpendicular to the paper surface. Then, it is formed so as to mesh with the inner teeth of the transmission gear 261B provided in the resistance applying portion RA. Further, the speed increasing gear 280B is provided at a position where it meshes with the outer teeth of the transmission gear 261B. The speed-increasing gear 280B is rotatably attached to the support shaft 263B. Then, as shown in FIG. 36B, a weight holder 320B that rotates integrally with the speed-increasing gear 280B is provided coaxially with the speed-increasing gear 280B. Then, the weight 340B is held by the weight holder 320B. Here, in the present embodiment, the weight holder 320B holds four weights 340B.

Since the weight holder 320B is provided so as to rotate integrally with the speed increasing gear 280B, the weight holder 320B also rotates as the speed increasing gear 280B rotates. As a result, the weight 340B held by the weight holder 320B revolves.

As shown in FIG. 37, in this modification, three cord CDs are sandwiched horizontally. These cord CDs are inserted into the cord insertion holes 14A constituting the motion conversion unit DT. Further, the pinion gear 50B protrudes to the outside from the case 440B of the motion conversion unit DT, and meshes with the transmission gear 261B of the resistance applying unit RA arranged adjacent to the motion conversion unit DT.

Therefore, when tension is applied to the cord CD in the braking direction, the catch roller 32A rotates clockwise around the rotation shaft 31B due to the frictional force generated between the outer cylinder 240A and the cord CD. At this time, as the catch roller 32A rotates, the pinion gear 50B provided on the outer cylinder 240A also rotates clockwise while rotating. Then, the transmission gear 261B that meshes with the pinion gear 50B starts rotating counterclockwise. As a result, the speed-increasing gear 280B that meshes with the transmission gear 261B starts rotating clockwise. At this time, since the diameter of the speed-increasing 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 accelerated and transmitted to the speed-increasing gear 280B. At this time, the inner cylinder 42A and the outer cylinder 240A rotate integrally due to the sliding resistance of both.

Then, due to the rotation of the speed-increasing gear 280B, the weight 340B starts revolving clockwise. Then, when the weight 340B comes into contact with the inner wall of the case 10Aa of the resistance applying portion RA, it becomes possible to apply a braking force against the movement of the cord CD. Then, in the state of FIG. 36A, the guide shaft 31C and the guide groove 31Ca come into contact with each other, so that the rotation of the inner cylinder 42A is prevented. Then, when tension is further applied to the cord CD in the braking direction, the outer cylinder 240A starts to rotate relative to the inner cylinder 42A. As a result, the braking force from the resistance applying portion RA can be applied while sandwiching the cord CD.

On the other hand, when tension is applied to the release of the cord CD, the catch roller 32A rotates counterclockwise around the rotation shaft 31B. At this time, the pinion gear 50B, the transmission gear 261B, and the speed increasing gear 280B rotate in the opposite direction to the case where tension is applied to the braking of the cord CD. Then, in the state of FIG. 36B, the guide shaft 31C and the guide groove 31Ca come into contact with each other, so that the rotation of the inner cylinder 42A is prevented. Then, the outer cylinder 240A continues to rotate relative to the inner cylinder 42A. In such a state, the distance between the outer cylinder 240A and the knurl 240 is larger than that in FIG. 36A, and the cord CD cannot be sufficiently sandwiched. In addition, since the cord CD cannot be sufficiently sandwiched, the rotation of the outer cylinder 240A is also suppressed. As a result, the rotation caused by the movement of the code CD is not transmitted to the resistance applying portion RA.

As described above, also in this modification, the regulation groove extends beyond the pinching position of the catch roller 32A or the catch roller 32B in the initial state, so that the diameter of the catch roller 32A or the catch roller 32B becomes small due to wear. Even if this happens, the code CD can be properly sandwiched.

<Modification 3 of the fifth embodiment>
Next, the braking device 5300 according to the third modification of the fifth embodiment will be described with reference to 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 applying unit RA are arranged in parallel in the left-right direction (direction perpendicular to the paper surface). .. The outline of this modification will be described below.

As shown in FIG. 38, the motion conversion unit DT includes a catch roller 830 composed of an inner cylinder 830A and an outer cylinder 830B, and a catch roller 840 including a knurl 43 rotatably attached to a shaft core 41. Similar to FIG. 31, the inner cylinder 830A and the outer cylinder 830B are rotatably attached to the inner cylinder 830A on the rotating shaft 831, and the inner cylinder 830A and the outer cylinder 830B can rotate relative to each other and slide against a torque below a certain level. It is configured to rotate integrally due to dynamic resistance. However, unlike FIG. 31, the rotating shaft 831 is provided at the center of the catch roller 830 and is pivotally supported by the case 810A. Further, at a position eccentric from the rotating shaft 831, the guide shaft 850 projects toward both sides in the axial direction. Further, in this modification, as shown in FIG. 39, the catch roller 840 is rotatably held in the support groove 821 (see FIG. 39) of the moving case 820 that can be translated in the vertical direction. Here, in the present embodiment, a pair of sandwiching members (sandwiching bodies) are configured by the catch rollers 830 and 840.

In this modified example as well, the resistance applying portion RA is provided with a centrifugal governor and transmits the rotation of the rotating shaft 831 to the centrifugal governor to brake it. Similar to the modified example 2, the rotation of the outer cylinder 830B of the catch roller 830 Is transmitted to the resistance applying portion RA via the pinion gear 50B (see FIG. 37). As for the configuration of the resistance imparting portion RA, the one described in the above-described embodiment can be appropriately used.

The moving case 820 includes a pair of parallel plates 822 formed at both ends of the catch rollers 830 and 840, and a support groove 821 is formed in each parallel plate 822 (see FIG. 39). Further, a guide groove 823 that opens upward is formed at the center in the front-rear direction above the parallel plate 822. Further, the parallel plate 822 has an elongated hole 824 into which the guide shaft 850 can be inserted at a position in front of the guide groove 823, and the elongated hole 824 is formed in a direction in which the guide shaft 850 can move in the front-rear direction. Will be done. Here, in this modification, the guide groove 823 corresponds to the regulation groove and extends beyond the pinching position of the sandwiching body (catch rollers 830, 840) in the initial state. Note that, in FIG. 38B, the predetermined pinching position is indicated by a broken line circle, and the following description describes the operation after the sandwiching body is worn.

Here, in this modification, in the state where tension is not applied to the cord CD (steady state), as shown in FIG. 38 (a), the cord CD contacts only the catch roller 830 located above and catches. It is configured so that it does not come into contact with the roller 840.

With the above configuration, when the cord CD moves backward (to the right in FIG. 38) from the state where tension is not applied to the cord CD (steady state), the outer cylinder 830B of the catch roller 830 is shown in FIG. 38 (a). Although it tries to rotate counterclockwise (in the direction of arrow X), the catch rollers 830 and 840, which are a pair of sandwiching members, do not sandwich the cord CD (FIGS. 39 (a) and 40 (a) also). (See), 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 not transmitted to the resistance applying portion RA to impart resistance to the cord CD. .. In this case, even if the outer cylinder 830B rotates, the guide shaft 850 provided in the inner cylinder 830A abuts on the elongated hole 824 of the moving case 820, and the moving case 820 is restricted to the case 810A in the front-rear direction. The cylinder 830A cannot rotate counterclockwise.

On the other hand, when the code CD moves forward (to the left in the figure), the outer cylinder 830B of the catch roller 830 rotates clockwise (in the Y direction of the arrow) as shown in FIG. 38 (b). At this time, since there is a sliding resistance between the outer cylinder 830B and the inner cylinder 830A, the outer cylinder 830B and the inner cylinder 830A start to rotate integrally. Then, at the same time as the rotation of the inner cylinder 830A, the guide shaft 850 provided in the inner cylinder 830A rotates clockwise, presses the upper surface of the elongated hole 824 of the moving case 820, and pushes up the moving case 820 upward (FIG. 38 (b). ), FIG. 39 (b), FIG. 40 (b)). As a result, the catch roller 840 held by the moving case 820 moves upward, that is, in a direction close to the cord CD, and cooperates with the catch roller 830 to sandwich the cord CD.

When the code CD further moves forward (to the left in the figure) in this state, the movement of the code CD is transmitted as the 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 further upward, so that the inner cylinder 830A cannot rotate any more. Only the cylinder 830B will rotate.

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 FIG. 38 (b) sandwiching the code CD, the movement of the code CD moves the outer cylinder 830B. The resistance applying portion RA applies a braking force to the rotation of the outer cylinder 830B, and the code CD is braked.

As described above, also in this modification, the regulation groove extends beyond the pinching position of the catch roller 32A or the catch roller 32B in the initial state, so that the diameter of the catch roller 32A or the catch roller 32B becomes small due to wear. Even if this happens, the code CD can be properly sandwiched.

6. Sixth Embodiment Next, the braking device 6000 according to the sixth embodiment of the present invention will be described with reference to FIGS. 41 to 43. The braking device 6000 of the present embodiment is similar to the braking device 1000 described in the second embodiment. However, the main difference of the braking device 6000 of the present embodiment is that both ends in the axial direction of each axis of the pair of sandwiching members are held by a link mechanism 720 composed of a pair of link plates 721 and 722. It has become. In the following description, the members having the same configuration as that of the first embodiment are designated by the same reference numerals, and the parts having different configurations will be mainly described.

Here, the braking device 6000 according to the sixth embodiment is an embodiment having no regulation groove, unlike the first to fifth embodiments. Note that, in FIG. 43A, the predetermined pinching position is indicated by a broken line circle, and the following description describes the operation after the sandwiching body is worn.

As shown in FIG. 41, the pair of sandwiching members according to the present embodiment is composed of a tension transmission roller 30 including a knurl 240 and an idle roller 40 including a roller portion 42. The shaft core 31 of the tension transmission roller 30 extending in the vertical direction is pivotally supported on one end side of the pair of link plates 721 on both ends in the axial direction, and the shaft core 41 of the idle roller 40 extending in the vertical direction is similarly supported at both ends in the axial direction. On the side, it is pivotally supported on one end side of the pair of link plates 722. Further, the shaft core 31 of the tension transmission roller 30 is provided with a pinion gear 50 at an 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 rotatably connected to each other via a shaft 723 inserted into a hole formed in the center of the plate to form a link mechanism 720. Further, at the other end of the link plates 721 and 722, connecting pins 724 and 725 (see FIG. 42) extending in the vertical direction and connecting the link plates 721 and 722 are provided.

Then, as shown in FIG. 43, the connecting pin 724 and the connecting pin 725 are pressed in a direction in which the coil portion approaches each other by a torsion spring 726 as an urging means wound around the shaft 723. Therefore, the link plate 721 and the link plate 722 are urged so that the tension transmission roller 30 and the idle roller 40 held by each rotate around the shaft 723 in a direction approaching each other, and as a result, these rollers 30, The code CD is sandwiched by 40. Although not shown in FIG. 41, the shaft 723 is pivotally supported by the case 10A.

With the above configuration, in a state where tension is not applied to the cord CD as shown in FIG. 43A (steady state), the tension transmission roller 30 and the idle roller 40 are torsion springs via the link mechanism 720. By being urged by 726, the code CD is sandwiched. When the cord CD moves forward (to the left in FIG. 43) in this state, the movement of the cord CD is transmitted to the tension transmission roller 30, and the rotation of the tension transmission roller 30 is the carrier 260 with internal teeth, the planetary gear 280, and the sun gear. It is sequentially transmitted to the attached weight holder 320 to rotate the weight 340 (see FIG. 2), and a braking force is applied to the cord CD by the rotational resistance of the weight 340. That is, also in the present embodiment, the narrowing member sandwiches the cord CD as the link mechanism 720 (link plate 721 and the link plate 722), which is the holding member, moves. At this time, the movement loci of the roller portion 42 and the knurl 240 are as shown by the double-headed arrows in FIG. 43 (a). Further, as shown in FIG. 43A, the movement locus extends beyond a predetermined pinching position.

On the other hand, when the cord CD moves rearward (to the right in FIG. 43), as shown in FIG. 43 (b), the tension transfer roller 30 held by the link plate 721 and the idle roller 40 held by the link plate 722 are moved. As the cord CD moves, it rotates around the shaft 723 in a direction in which the distance between the tension transmission roller 30 and the idle roller 40 increases against the urging force of the torsion spring 726 via the link mechanism 720. As a result, the narrowing of the cord CD by the narrowed body is weakened, and the imparting of resistance to the cord CD of the resistance applying portion RA via the tension transmission roller 30 is reduced.

In the above embodiment, the link mechanism 720 has a configuration in which a pair of link plates 721 and 722 are arranged on both ends in the axial direction, but it is also possible to provide a pair of link plates on only one side in the axial direction. is there.

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 configuration different from that of the shielding device 100A of the above embodiment. For example, the solar shading device of the present invention may be a roll curtain on which the curtain cloth is wound, or a blind in which a plurality of slats move up and down. Further, as shown in FIG. 44, the braking device 1000 may be fixed to the window frame 110 by using screws 111 or the like. Further, the braking device 1000 may be provided inside the grip 109. Further, the braking device 1000 may be provided at an arbitrary place in the passage path of the elevating cord 102.

As described above, according to the present invention, even when the sandwiching body that sandwiches the cord becomes smaller due to wear, a braking device capable of appropriately sandwiching the cord is provided, and deterioration of the member can be prevented. it can.

10A: Case, 31, 41: Shaft core, 50: Pinion gear, 70: Base, 200: Alignment member, 220: Slider, 240: Knurl, 260: Carrier with internal teeth, 280: Planetary gear, 300: Plate, 320 : Weight holder with sun gear, 340: Weight

Claims (17)

A braking device that brakes the longitudinal movement of the cord.
A sandwiching body having a pair of sandwiching members for sandwiching the cord is provided.
At least one of the sandwiching members is configured to move in a predetermined movement locus.
The sandwiching body sandwiches the cord at a predetermined sandwiching position of the movement locus.
A braking device in which the movement locus extends beyond the pinching position. The movement locus extends in the direction toward the cord.
The braking device according to claim 1. The movement locus is a locus of movement of at least one of the sandwiching members along a regulation groove that regulates the movement of at least one of the sandwiching members.
The braking device according to claim 1 or 2. A case is provided in which at least one of the sandwiching members is included and the regulation groove is provided.
The braking device according to claim 3. The sandwiching body is composed of a first sandwiching member and a second sandwiching member.
The first sandwiching member has a shaft and has a shaft.
The regulation groove is formed so that the shaft is accessible to the cord.
The pinching position is a position separated from the end of the regulation groove on the approaching direction side with respect to the cord.
The braking device according to claim 4. Both of the pair of sandwiching bodies move in the movement locus,
The movement loci are configured so that their extension lines intersect each other.
The braking device according to claim 5. The second sandwiching member has a shaft and has a shaft.
The regulation groove is configured so that the cord can be sandwiched at a predetermined pinching position by moving the shafts of the first pinching member and the second pinching member along the regulation groove.
The braking device according to claim 6. Two regulation grooves are formed in the case, and at least one is arcuate.
The braking device according to claim 7. The two regulation grooves are configured to be inclined with respect to the moving direction of the cord.
The braking device according to claim 8. The two regulatory grooves have different curvatures from each other.
The braking device according to claim 8 or 9. The shaft is arranged approximately vertically.
The braking device according to any one of claims 6 to 10. The second sandwiching member is composed of a sandwiching plane.
The braking device according to claim 5. The sandwiching plane is a plane fixed before and after the movement of the first sandwiching member.
The braking device according to claim 12. It has an urging member that urges the first pinching member from a release position for releasing the cord to a pinching position for sandwiching the cord.
The braking device according to any one of claims 5 to 13. It has a guide wall formed along the edge of the regulation groove.
The braking device according to any one of claims 3 to 14. The braking device according to any one of claims 1 to 15.
A shielding member that can be lifted and lowered by moving the cord,
A cloaking device equipped with. The braking device according to claim 12 or 13.
A shielding member that can be lifted and lowered by moving the cord,
A head box containing the braking device is provided.
The sandwiching plane is the bottom surface of the head box.
Cloaking device.

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