JP6345526B2 - Safety tool - Google Patents

Description

  The present invention relates to a safety tool attached to a loop-shaped operation cord suspended from a support member installed in a building. As a support member, loop-shaped operation cords such as horizontal blinds, raised curtains, pleated screens, roll screens, roll-up screens, vertical blinds, curtain rails, vertical pleated screens, vertical roll screens, panel curtains, etc. are used. And supporting members (head box, head rail, etc.) for the shielding device that can open and close the shielding material.

In shielding devices such as horizontal blinds, one end of the lifting / lowering cord is attached to the bottom rail provided under the shielding member suspended from the head box, and the other end of the lifting / lowering cord is attached to the winding shaft. By rotating the take-up shaft, the lifting / lowering cord is wound and rewound to raise and lower the shielding material. In such a shielding device, a loop-shaped operation cord is hung on an operation pulley rotatably supported by the head box, and the operation pulley is rotated by operating the operation cord, and the rotation is used as a winding shaft. The winding shaft is rotated by transmitting.
Patent Document 1 discloses a cord clip for bundling operation cords so that the operation cords are not caught when not in use.

JP 2007-113323 A

  Although the function of the code clip of Patent Document 1 has no problem at all, there is a problem that it is troublesome to bundle the operation code on the code clip.

  The present invention has been made in view of such circumstances, and provides a safety tool that can easily prevent an operation cord from being caught during non-operation.

  According to the present invention, the safety tool is attached to a loop-shaped operation cord suspended from a support member installed on a building, and the safety tool is a first of the operation cords suspended from the support member. And a main body member that accommodates the second cord portion, and an engagement member that is disposed between the first and second cord portions and engages with the first and second cord portions, (1) the safety tool It is configured to be manually movable along the first and second code portions and to hold the operation cord by itself when not operated, or (2) the safety tool is along the first and second code portions A switching portion that enables switching between a manually movable state and a manually unmovable state, wherein the engaging member is moved along with the movement of the safety tool. Configured so that the height position to engage the first and second code portion changes, safety tool is provided.

When the safety tool of the present invention is attached to the operation cord, the first and second code portions of the operation cord are accommodated in the main body member. Since the safety tool can be manually moved along the operation code, when not operating, the position of the safety tool can be manually lowered to the lower end of the operation code as shown in FIG. Since the loop of the operation cord is accommodated in the main body member by the length of the safety tool from the lower end of the operation cord, the user is prevented from being caught in the loop by the operation cord. Further, at the time of operation, as shown in FIG. 1B, if the safety tool is pulled up along the operation cord to a height position that does not interfere with the operation of the operation cord, the safety tool does not get in the way. Since the safety tool has an engaging member disposed between the first and second cord portions, the safety tool is maintained at a substantially constant height when the operation cord is operated. However, the safety tool of the present invention does not interfere with the operation of the operation code.
As described above, the safety tool of the present invention does not interfere with the operation of the operation code, and can prevent the user from being caught by the operation code during non-operation.

Hereinafter, various embodiments of the present invention will be exemplified. The following embodiments can be combined with each other.
Preferably, the main body member has a strength that does not buckle when the main body member is moved along the first and second cord portions, and the first and second cord portions are accommodated after the first and second cord portions are accommodated. The first and second cord portions are covered so that the two cord portions do not escape from the main body member.
Preferably, a cap member attachable to one end of the main body member is further provided, and the engagement member is provided on the cap member.
Preferably, the engagement member includes a pulley that is rotatable relative to the main body member.
Preferably, the pulley is movable relative to the main body member.
Preferably, the switching portion is a slide member having an engagement convex portion on an inner surface side and supported so as to be slidable along the longitudinal direction of the main body member, and the slide member is attached to the engagement member. In contrast, the safety tool is configured to be manually movable along the first and second cord portions by moving the engaging convex portion away from the engaging tool.
Preferably, the safety tool is configured such that a predetermined height from the floor is set as a prevention height by the length of the main body member and the height from the floor to the lower end of the loop of the operation cord.
Preferably, the safety tool includes stop means for stopping further lowering of the main body member when the lower end of the main body member reaches the lower end of the loop of the operation cord during the lowering operation of the main body member.

Moreover, according to another viewpoint of this invention, it is a safety tool attached to the loop-shaped operation code suspended from the supporting member installed in a building, Comprising: The said safety tool is suspended from the said supporting member, A main body member that accommodates the first and second code portions of the operation cord, an upper cap member that is connected to the upper side of the main body member, a lower end of the loop that is connected to the lower side of the main body member, and the operation code is disposed. The upper cap member communicates the first and second cord insertion portions through which the first and second cord portions are inserted, and the first and second cord insertion portions. A safety tool is provided that includes a narrowed portion that is narrower than the first and second cord insertion portions.
Preferably, the width of the narrowed portion of the upper cap member is smaller than the diameter of the operation cord.

The state which attached the safety tool 17 of 1st Embodiment of this invention to the operation cord 7 is shown, (a) is a non-operation state, (b) shows the state at the time of operation. The state which the 1st and 2nd code | cord | chord part 7a, 7b of the operation cord 7 is penetrated by the safety tool 17 of 1st Embodiment of this invention is shown, (a) is a perspective view, (b) is sectional drawing. . The structure of the safety tool 17 of 1st Embodiment of this invention is shown, (a) is a disassembled perspective view, (b) is a perspective view, (c) is sectional drawing. It is a perspective view which shows the safety tool 17 of 2nd Embodiment of this invention. It is a perspective view which shows the safety tool 17 of 3rd Embodiment of this invention. The safety tool 17 of 4th Embodiment of this invention is shown, (a) is a disassembled perspective view, (b) is a perspective view, (c) is a disassembled perspective view of the cap member 19 and the engaging member 20, (d). FIG. 6 is a perspective view of the cap member 19. The safety tool 17 of 4th Embodiment of this invention is shown, (a) is sectional drawing which passes along the pulley part 20c and the axial part 20d, (b) is sectional drawing which passes along the inner wall part 19d2 and the axial part 20d. The safety tool 17 of 5th Embodiment of this invention is shown, (a) is a perspective view, (b) is an exploded perspective view of the cap member 19 and the slide member 22, (c) is an exploded perspective view. It is sectional drawing which shows the safety tool 17 of 5th Embodiment of this invention, (a) is explanatory drawing which shows the relationship between the slide convex part 22b and the slide groove | channel 19f, (b) is related with the engagement convex part 22c. FIG. 5B shows a state in which the engaging member 20 is close to the joint member 20 and FIG. In the safety tool 17 of 6th Embodiment of this invention, the engagement convex part 22c shows the state which adjoined to the engagement member 20, (a) is the 1st and 2nd code | cord | chord parts 7a and 7b which have the ball | bowl 8 are safety tools. 17A and 17B are perspective views showing a state of being inserted through 17, a cross-sectional view of (a), and (c) a cross-sectional view of the safety tool 17 alone. In the safety tool 17 of 6th Embodiment of this invention, the engagement convex part 22c shows the state which distanced from the engagement member 20, (a) is 1st and 2nd code | cord | chord parts 7a and 7b which have the ball | bowl 8 are safety tools. It is a perspective view which shows the state currently penetrated by 17, and (b) is sectional drawing of (a). The state which attached the safety tool 17 of embodiment of another viewpoint of this invention to the operation cord 7 is shown. 12A is an exploded perspective view of the safety tool 17 in FIG. 12 and FIG. 12B is a sectional view of the main body member 18 in FIG. 13A shows the upper cap member 29 in FIG. 13A, where FIG. 13A is a front view, FIG. 13B is a plan view, FIG. 13C is a bottom view, FIG. 13D is a right side view, and FIG. , (F) is a rear view, and (g) is a perspective view. The lower cap member 39 in FIG. 13A is shown, (a) is a front view, (b) is a plan view, (c) is a bottom view, (d) is a right side view, and (e) is a left side view. (F) is a rear view, (g) is a perspective view. (A)-(e) is a perspective view which shows the method of attaching the safety tool 17 to the operation cord 7. FIG.

  Hereinafter, embodiments of the present invention will be described. Various characteristic items shown in the following embodiments can be combined with each other. The invention is established independently for each feature.

<First Embodiment>
In the horizontal blind as the shielding device shown in FIG. 1, a multi-stage slat 3 as a shielding material is suspended and supported via a ladder tape 2 suspended from the head box 1, and a bottom rail 4 is provided at the lower end of the ladder tape 2. Is supported suspended. The horizontal blinds are installed according to the opening size of the building.

  In the vicinity of the ladder tape 2, the elevating cord 5 is suspended from the head box 1. The lifting cord 5 has an upper end wound around a winding shaft (not shown) disposed in the head box 1 and a lower end connected to the bottom rail 4.

  The lifting / lowering cord 5 is wound or rewound based on the rotation of the winding shaft, and the bottom rail 4 and the slat 3 are lifted and lowered based on the rotation. Also, the angle of each slat 3 is adjusted in phase with the ladder tape 2 based on the rotation of the winding shaft.

  A loop-shaped operation cord 7 is suspended from the head box 1 via a cord gate 15. The operation cord 7 is hooked on an operation pulley (not shown) supported rotatably with respect to the head box 1, and the operation pulley is rotated by pulling down the operation cord 7, and the rotation of the operation cord 7 is the winding described above. Transmitted to the shaft.

  A safety tool 17 that accommodates the first and second code portions 7 a and 7 b of the operation cord 7 is attached to the operation cord 7. The safety tool 17 can be retrofitted to the existing operation cord 7 by an attachment method described later. As the operation method of the operation cord 7, the bottom rail 4 is raised and lowered by pulling down only one of the cord portions 7a and 7b, and one of the cord portions 7a and 7b is used when raising the bottom rail 4, and the bottom There is a method of using the other of the cord portions 7a and 7b when lowering the rail 4, and the safety tool 17 of the present invention can be applied to either of them.

  Here, the safety tool 17 will be described in detail with reference to FIGS. The safety tool 17 includes a main body member 18, a cap member 19, and an engagement member 20. The main body member 18 is a cylindrical (cylindrical) member, and the code portions 7a and 7b of the operation cord 7 are accommodated in the main body member 18 as shown in FIG. As a result, the cord portions 7 a and 7 b are covered by the length of the main body member 18. Since the length of the main body member 18 and the height from the floor to the loop lower end 7c of the operation cord 7 define the height of the main body member 18 to be prevented from being caught. The length is set as appropriate. For example, when the required anti-hanging height is 1100 mm from the floor and the height of the loop lower end 7 c is 600 mm, the length of the main body member 18 can be 500 mm. As shown in FIG. 3, the cap member 19 includes a lid portion 19 c and a pair of side wall portions 19 d extending from the lid portion 19 c toward the main body member 18. The pair of side wall portions 19 d are configured to be press-fit into the main body member 18, and the main body member 18 and the cap member 19 can be connected by pushing the pair of side wall portions 19 d into the main body member 18. Further, since the bridge portion 19e is formed between the pair of side wall portions 19d so as to connect the pair of side wall portions 19d, the deformation of the side wall portion 19d in the central direction of the main body member 18 is suppressed. The connection strength between the main body member 18 and the cap member 19 is increased. The lid portion 19c is provided with cord insertion portions 19a and 19b through which the cord portions 7a and 7b are inserted, respectively. The engaging member 20 includes a support shaft 20a fixed to the side wall portion 19d, and a pulley 20b supported so as to be rotatable with respect to the support shaft 20a. The cap member 19 is attached to the upper end of the main body member 18. Further, as shown in FIG. 2, a lower cap member 119 having the same configuration as that of the cap member 19 but not including the engaging member 20 is attached to the lower end of the main body member 18. The lower cap member 119 can be attached to the main body member 18 by, for example, press fitting into the main body member 18, and when the safety tool 17 is manually moved downward along the cord portions 7a and 7b, By bringing the lower cap member 119 into contact with the loop lower end 7c, as shown in FIG. 1A, the height of the lower end of the main body member 18 substantially matches the height of the loop lower end 7c. Can do. In addition, there is an effect that the safety tool 17 is prevented from coming off the operation code 7.

  When attaching the safety tool 17 to the operation cord 7, first, as shown in FIG. 3A, the cap member 19 to which the engagement member 20 is attached is separated from the main body member 18. The cord portions 7 a and 7 b are accommodated in the main body member 18, and then the cap member 19 is engaged with the main body member 18. In this state, as shown in FIG. 2B, the engaging member 20 is disposed between the first cord portion 7a and the second cord portion 7b. Further, since the gap between the outer surface of the pulley 20b and the inner surface of the main body member 18 is slightly smaller than the diameter of the operation cord 7, the cord portions 7a and 7b are slightly compressed in the pulley 20b. The safety tool 17 is attached to the operation cord 7 by being engaged.

  The holding force between the cord portions 7a and 7b and the engaging member 20 is set to a size that allows the safety tool 17 to be manually moved along the cord portions 7a and 7b. That is, the sliding resistance between the non-rotating pulley 20b and the cord portions 7a and 7b sandwiched between the main body member 18 and the safety tool 17 is at a level at which the safety tool 17 can be raised and lowered manually. . Therefore, when the operation code 7 is not operated, the user may be caught in the loop of the operation code 7 by moving the safety tool 17 to the vicinity of the lower end 7c of the loop of the operation code 7 as shown in FIG. Is prevented. The safety tool 17 can be lowered to a position where the lower end 7c of the operation cord 7 contacts the engaging member 20, but cannot be lowered further unless the cap member 19 is removed. Unintentional disconnection from the code 7 is suppressed. On the other hand, when operating the operation code 7, as shown in FIG. 1B, the safety tool 17 is moved to a position that does not interfere with the operation of the operation code 7, and the operation code 7 is operated below the safety tool 17. Thus, the bottom rail 4 can be raised and lowered.

  Further, as shown in FIG. 2B, when the first cord portion 7a of the operation cord 7 is pulled down in the direction of arrow A, the second cord portion 7b is pulled up in the direction of arrow B. As a result, the pulley 20b Rotate in the direction of arrow R. When the second cord portion 7b of the operation cord 7 is pulled down, the pulley 20b rotates in the direction opposite to the arrow R by the same principle. Thus, since the displacement of the operation cord 7 when the operation cord 7 is lowered is converted into the rotation of the pulley 20b, the height position of the safety tool 17 is substantially maintained even when the operation cord 7 is lowered. It is not changed and is held at a substantially constant height position.

The present invention can also be implemented in the following forms.
The engaging member 20 may be configured such that the pulley portion 20c and the shaft portion 20d are integrally formed as in the fourth embodiment. In this case, the shaft portion 20 d is rotatably supported by the side wall portion 19 d of the cap member 19.
The engaging member 20 may be a member that is not rotatable with respect to the cap member 19, and may be, for example, a member that bends a portion that contacts the operation cord 7 in a non-linear manner, for example, a rod-shaped member. Further, the resistance may be increased by bending the surface in a non-linear manner and providing unevenness on the surface. In this case, when the operation cord 7 is pulled down, the safety tool 17 may be lowered together. In this case, the safety tool 17 can be manually lifted up and operated. Similar to the above embodiment, the safety tool 17 can be manually pulled down to the safe state height after the operation. Further, the engaging member 20 may be supported by the cap member 19 by being retrofitted to the cap member 19, or may be integrally formed with the cap member 19.
In the above embodiment, the loop-shaped operation cord 7 is used to rotate the drive shaft by rotating the operation pulley. For example, in the case of a vertical blind or a string curtain curtain, the loop-shaped operation cord is It is drawn around the hanger rail so as to be able to circulate and is used to move a runner that supports the slat by its operation (see, for example, WO2012 / 165301). Further, the safety tool 17 may be provided above the tension weight or tension pulley.
The main body member 18 only needs to be strong enough not to buckle up and down when the main body member 18 is moved along the cord portions 7a and 7b, and the cord portions 7a and 7b are accommodated in the main body member 18. There may be an internal / external communication location where the cord portions 7a and 7b do not come out of the main body member 18 in the state.

Second Embodiment
The safety tool 17 of the second embodiment of the present invention is similar in structure and action to the first embodiment, and mainly has a slit 18a provided in the main body member 18 as shown in FIG. It is a difference. Hereinafter, the difference will be mainly described.

  In the first embodiment, since the main body member 18 has a cylindrical shape without the slit 18a, the holding member 20 is attached to the cap member so that the loop-like operation cord 7 can be easily attached to the operation cord 7. 19, the cap member 19 is configured to be separable from the main body member 18. However, in this embodiment, the code portions 7 a and 7 b of the operation cord 7 can be accommodated in the main body member 18 through the slit 18 a. it can. For this reason, in this embodiment, the cap member 19 can be integrated with the main body member 18. Further, the cap member 19 may be omitted, and the main body member 18 may be configured to support the engaging member 20. The slit width is set to a width that allows the operation cord 7 to be compressed and inserted at the time of attachment, but not easily removed during normal use. Further, the point that the safety tool 17 is prevented from coming out of the operation cord 7 when the safety tool 17 is pulled down is the same as in the first embodiment.

<Third Embodiment>
The safety tool 17 of the third embodiment of the present invention is similar in structure and action to the first embodiment, and as shown in FIG. 5, a hook member 21 is further attached to the main body member 18 of the first embodiment. The main difference is that it is worn. Hereinafter, the difference will be mainly described.

  In the present embodiment, when the operation cord 7 is not operated, the safety tool 17 can be pulled down to secure the height for preventing the hook, and the lower portion of the operation cord 7 than the safety tool 17 is connected to the hook member 21. Since it is possible to secure the height for preventing catching by hooking to the surface, it is possible to select which method is used to secure the height for preventing catching. Accordingly, it is possible to easily secure the operation code 7 by selecting a method that is easy to use by selecting the method according to the above-described method and securing the height to prevent catching by increasing the lower end position of the operation code 7. It is possible to suppress the catching. The lower end of the operation cord may be hooked on the hook after the operation cord 7 is operated while the safety tool 17 is held at a high position (the state at the time of operation). It is also possible to raise the safety tool 17 with the lower end hooked.

<Fourth embodiment>
The safety tool 17 of the fourth embodiment of the present invention is similar in structure and action to the first embodiment, and the engagement structure of the cap member 19 and the body member 18 and the structure and holding method of the holding member 20 are the same. Is different. Hereinafter, the difference will be mainly described.

  As shown in FIG. 6D, the side wall portion 19d of the cap member 19 has a double wall structure of an outer wall portion 19d1 and an inner wall portion 19d2. The outer wall portion 19d1 is curved with substantially the same radius of curvature as the inner surface of the main body member 18, and the inner wall portion 19d2 is a substantially flat wall. A cavity is provided between the outer wall portion 19d1 and the inner wall portion 19d2. The outer wall portion 19d1 is provided with an engaging convex portion 19g, and the engaging convex portion 19g is provided with a tapered surface on the main body member 18 side. A long hole-shaped holding hole 19h is provided in the inner wall portion 19d2. The main body member 18 is provided with an engagement hole 18b that engages with the engagement protrusion 19g. The engagement hole 18b can be formed by drilling the main body member 18. When attaching the cap member 19 having the engaging protrusion 19g to the upper and lower ends of the main body member 18, an engaging hole 18b that engages with the engaging protrusion 19g is formed in the vicinity of the upper and lower ends of the main body member 18.

  As shown in FIG. 6 (c), the holding member 20 includes a pulley portion 20c and a shaft portion 20d that protrudes in the direction of the rotation axis of the pulley portion 20c. The holding member 20 can be rotatably supported by the cap member 19 by engaging the shaft portion 20d with the holding hole 19h while elastically deforming the inner wall portion 19d2 toward the outer wall portion 19d1. Since there is a cavity between the outer wall portion 19d1 and the inner wall portion 19d2, the inner wall portion 19d2 is easily elastically deformed. For this reason, the holding member 20 can be easily attached to the cap member 19.

  Further, as shown in FIG. 6A, when the side wall portion 19d of the cap member 19 is inserted into the main body member 18 and the engaging convex portion 19g is engaged with the engaging hole 18b, FIG. As shown, the cap member 19 is engaged with and integrated with the main body member 18. More specifically, when the side wall portion 19d of the cap member 19 is inserted into the main body member 18, and the cap member 19 is further pushed in from a state where the tapered surface of the engaging convex portion 19g is in contact with the end surface 18c of the main body member 18, When the outer wall portion 19d1 is elastically deformed toward the radial center of the main body member 18, the engaging convex portion 19g enters the main body member 18, and when further pushed in from this state, the engaging convex portion 19g becomes the engaging hole 18b. When the outer wall portion 19d1 is reached, the outer wall portion 19d1 returns to its original shape, and the engaging convex portion 19g is engaged with the engaging hole 18b. Since a cavity is provided between the outer wall portion 19d1 and the inner wall portion 19d2, the outer wall portion 19d1 is easily elastically deformed. Further, the point that the safety tool 17 is prevented from coming out of the operation cord 7 when the safety tool 17 is pulled down is the same as in the first embodiment.

  FIG. 6B and FIGS. 7A to 7B show the state after the assembly is completed by the above method. As shown in FIG. 7B, since the shaft portion 20d of the holding member 20 is held by the long hole-shaped holding hole 19h of the inner wall portion 19d2 of the cap member 19, the shaft portion 20d is held in the holding hole 19h. The holding member 20 is movable within a movable range. Since the shape of the holding hole 19h is long in the horizontal direction (the direction of the perpendicular line between the cord portions 7a and 7b), the holding member 20 is movable in this direction.

  Here, the merit of this embodiment will be described. For example, the loop-shaped operation cord 7 is formed by welding both ends of a single cord formed by covering a core made of synthetic resin with a sheath formed by weaving synthetic resin yarn, or by connecting male and A female connector part is formed and a male / female connector part is connected. Such an operation cord 7 has elasticity in the outer skin portion made of a knitted fabric, but such elasticity is usually lost in a connecting portion made of a welded portion or a connector portion. Therefore, when the holding member 20 is not movable in the horizontal direction as in the first embodiment, the connecting portion may not pass through the gap between the holding member 20 and the main body member 18. On the other hand, according to the present embodiment, since the holding member 20 is movable in the horizontal direction, the connecting portion having no elasticity can easily pass through the gap between the holding member 20 and the main body member 18. There is a merit. In the present embodiment, the holding member 20 can be moved in the horizontal direction, but the moving direction of the holding member 20 may be an inclined direction. In addition, it is possible to provide a portion in which the cord portions 7 a and 7 b are inclined in the main body member 18 by inclining the wall surface in contact with the cord portions 7 a and 7 b in the main body member 18. In this case, the moving direction of the holding member 20 can be set to the up and down direction. That is, the movement direction of the holding member 20 is a direction in which the gap between the holding member 20 and the main body member 18, that is, the gap between the members holding the cord portions 7a and 7b can be widened when the connecting portion passes. Any direction is acceptable.

<Fifth Embodiment>
The safety tool 17 of the fifth embodiment of the present invention is similar in configuration and action to the first embodiment, and differs in that it has a slide member 22 as shown in FIGS. Hereinafter, the difference will be mainly described.

  In the present embodiment, the safety tool 17 includes a main body member 18, a cap member 19, an engagement member 20, and a slide member 22. As shown in FIGS. 8 to 9, the slide member 22 has a holding convex portion 22 c and a slide convex portion 22 b on the inner surface side. The cap member 19 includes a slide groove 19f that engages with the slide protrusion 22b. In addition, the side wall portion 19d of the cap member 19 is provided with a long and narrow ridge 19e.

  When attaching the safety tool 17 to the operation cord 7, first, as shown in FIG. 8 (b), as shown by the arrow X from the lower side of the cap member 19 to which the holding member 20 is attached, the slide member The cap member 19 is inserted into the slide member 22 so that the slide protrusion 22b of 22 is engaged with the slide groove 19f of the cap member 19. The position where the slide protrusion 22b contacts the upper end 19f1 of the slide groove 19f is the upper limit position of the slide member 22 relative to the cap member 19.

  Next, as shown in FIG. 8C, the main body member 18 is inserted into the gap between the side wall portion 19d of the cap member 19 and the slide member 22, and the state shown in FIG. . In the first embodiment, since the entire side wall portion 19d of the cap member 19 is in contact with the main body member 18, if the dimension of the side wall portion 19d of the cap member 19 changes even slightly, the cap member 19 is inserted into the main body member 18. However, in this embodiment, only the ridge 19e of the side wall portion 19d is the main body member, although the insertion resistance during the change greatly changes or the holding force of the engagement between the cap member 19 and the main body member 18 changes significantly. 18, the change in insertion resistance and holding force when the dimension of the side wall 19 d of the cap member 19 changes is relatively small.

  As shown in FIG. 9A, the slide groove 19f is longer than the slide convex portion 22b, so that the slide member 22 can move relative to the cap member 19 within a range in which the slide convex portion 22b can move within the slide groove 19f. Relative movement is possible. In a state where the safety tool 17 is assembled, when the slide convex portion 22b is moved downward, the slide convex portion 22b comes into contact with the upper end portion 18c of the main body member 18, so that the position thereof slides relative to the cap member 19. This is the relative lower limit position of the member 22.

  FIGS. 9B to 9C show states when the slide member 22 is relatively moved up and down. In the state of FIG. 9B, the holding convex portion 22c is relatively close to the holding member 20, and the gap between the holding convex portion 22c and the holding member 20 is relatively narrow. In this state, the safety tool 17 is engaged with the cord portions 7a and 7b with a strong holding force. In this state, it is not easy to move the safety tool 17 manually. On the other hand, as shown in FIG. 9C, when the position of the holding convex portion 22c is moved away from the holding member 20, a gap between the holding convex portion 22c and the holding member 20 is widened. As a result, the cord portions 7a, 7b, The holding force of the engagement with the safety tool 17 is reduced or the engagement is released. As a result, the safety tool 17 can be easily moved manually.

<Sixth Embodiment>
The safety tool 17 of the sixth embodiment of the present invention is similar in configuration and operation to the fifth embodiment, and as shown in FIGS. 10 to 11, the operation cord 7 for attaching the safety tool 17 is a so-called ball chain. This is the main difference. Hereinafter, the difference will be mainly described.

  In the present embodiment, the operation cord 7 is a ball chain in which balls 8 are formed at equal intervals on a loop-shaped cord, and the pulley 20b of the holding member 20 has a plurality of recesses 20c that engage with the balls 8. It has an outer shape. In the present embodiment, three recesses 20c are formed at equal intervals in the circumferential direction of the pulley 20b.

  Also in this embodiment, the slide member 22 can move up and down relatively with respect to the cap member 19. FIG. 10 shows a state in which the holding convex portion 22c is relatively close to the holding member 20, and in this state, the gap between the holding convex portion 22c and the holding member 20 is relatively narrow. The ball 8 of the second cord portion 7b is engaged with the recess 20c of the pulley 20b, and the convex between the two adjacent recesses 20c between the two adjacent balls 8 of the first cord portion 7a. The part is located. For this reason, in the state of FIG. 10, the safety tool 17 cannot be moved manually. On the other hand, as shown in FIG. 11, when the position of the holding convex portion 22 c is moved away from the holding member 20, a gap between the holding convex portion 22 c and the holding member 20 is widened. As a result, the engagement between the holding member 20 and the ball 8 is increased. The combined holding force is reduced or the engagement is released, and the safety tool 17 can be moved manually.

<An Embodiment from Another Viewpoint>
In the above embodiment, the safety tool 17 includes the engaging member 20 that engages with the code portions 7a and 7b of the operation cord 7, and the safety tool 17 is moved along the operation cord 7 as shown in FIG. Although it was possible to hold the safety tool 17 at the raised position, the safety tool 17 according to the embodiment of the present aspect is not provided with the engagement member 20, and as shown in FIG. Is locked by the loop lower end 7c of the operation cord 7 during both non-operation and operation. Details will be described below.

  In the horizontal blind as the shielding device shown in FIG. 12, a multi-stage slat 3 as a shielding material is suspended and supported via a ladder tape 2 suspended from the head box 1, and a bottom rail 4 is provided at the lower end of the ladder cord 12. Is supported suspended. The horizontal blinds are installed according to the opening size of the building.

  In the vicinity of the ladder cord 12, the elevating cord 5 is suspended from the head box 1. The lifting cord 5 has an upper end wound around a winding shaft (not shown) disposed in the head box 1 and a lower end connected to the bottom rail 4. Of the three lifting cords 5, two at both ends are suspended along the outer edge of the slat 3 and the middle one is suspended along the inner edge of the slat 3. The number of the lifting / lowering cords 5 and the position to hang down are not limited to this.

  The lifting / lowering cord 5 is wound or rewound based on the rotation of the winding shaft, and the bottom rail 4 and the slat 3 are lifted and lowered based on the rotation. Also, the angle of each slat 3 is adjusted in phase with the ladder cord 12 based on the rotation of the winding shaft.

  A loop-shaped operation cord 7 is suspended from the head box 1 via a cord gate 15. The operation cord 7 is hooked on an operation pulley (not shown) supported rotatably with respect to the head box 1, and the operation pulley is rotated by pulling down the operation cord 7, and the rotation of the operation cord 7 is the winding described above. Transmitted to the shaft.

  A safety tool 17 that accommodates the code portions 7 a and 7 b of the operation code 7 is attached to the operation code 7. The safety tool 17 can be retrofitted to the existing operation cord 7 by an attachment method described later. As the operation method of the operation cord 7, the bottom rail 4 is raised and lowered by pulling down only one of the cord portions 7a and 7b, and one of the cord portions 7a and 7b is used when raising the bottom rail 4, and the bottom There is a method of using the other of the cord portions 7a and 7b when lowering the rail 4, and the safety tool 17 of the present invention can be applied to either of them.

  Here, the safety tool 17 will be described in detail with reference to FIGS. The safety tool 17 includes an upper cap member 29, a main body member 18, and a lower cap member 39.

  As shown in FIGS. 13 to 14, the upper cap member 29 is a cylindrical member having a glasses-shaped cross section, and the cord insertion portions 29a and 29b through which the cord portions 7a and 7b are inserted, the cord insertion portions 29a, 29b is provided with a narrowed portion 29c having a width narrower than that of the cord insertion portions 29a and 29b. The radius of curvature of the inner surface of the upper cap member 29 at the cord insertion portions 29a and 29b is larger than the radius of the operation cord 7, and the cord portions 7a and 7b can move smoothly in the cord insertion portions 29a and 29b. It has become. On the other hand, the width of the narrowed portion 29c is narrower than the diameter of the operation cord 7, and it is possible to push the operation cord 7 into the narrowed portion 29c while crushing the operation cord. 7a and 7b do not enter the constricted portion 29c, and the cord portions 7a and 7b do not contact each other.

  The upper cap member 29 includes an insertion portion 29d and a locking portion 29e. The insertion portion 29d is configured to be press-fitted into the main body member 18, and the lower surface of the locking portion 29e comes into contact with the upper opening edge of the main body member 18 as shown in FIGS. 16 (c) to (d). By inserting the insertion portion 29d into the opening of the main body member 18 until the main body member 18 and the upper cap member 29 are connected.

  As shown in FIGS. 13A and 13B, the main body member 18 is a cylindrical member having a cross section of glasses, and cord insertion portions 18a and 18b through which the code portions 7a and 7b are inserted, and cord insertion A narrowed portion 18c is provided which communicates the portions 18a and 18b and is narrower than the cord insertion portions 18a and 18b. The opening shape of the main body member 18 is slightly larger than the opening shape of the upper cap member 29, and accordingly, the radius of curvature of the inner surface of the main body member 18 at the cord insertion portions 18a and 18b is the cord insertion portion 29a. 29b, the radius of curvature of the inner surface of the upper cap member 29 is larger. Accordingly, the cord portions 7a and 7b can move smoothly in the cord insertion portions 18a and 18b. The width of the narrowed portion 18 c of the main body member 18 is also larger than the width of the narrowed portion 29 c of the upper cap member 29. As described above, since the contact between the cord portions 7a and 7b is hindered by the narrowed portion 29c of the upper cap member 29, the width of the narrowed portion 18c of the main body member 18 is larger than the diameter of the operation cord 7. The main body member 18 may not have the narrowed portion 18c.

  As shown in FIGS. 13 and 15, the lower cap member 39 includes cord insertion portions 39a and 39b through which the cord portions 7a and 7b are inserted, and a turning portion 39c in which the loop lower end 7c is disposed. In the present embodiment, the turning portion 39c is a smooth curved surface (arc surface), but the turning portion 39c may be constituted by a support shaft and a pulley supported so as to be relatively rotatable with respect to the support shaft. The lower cap member 39 includes an insertion portion 39d and a locking portion 39e. The insertion portion 39d is configured to be press-fitted into the main body member 18, and as shown in FIGS. 16D to 16E, the upper surface of the locking portion 39e contacts the lower opening edge of the main body member 18. The main body member 18 and the lower cap member 39 can be connected by pushing the insertion portion 39d into the opening of the main body member 18 until it comes into contact.

  When attaching the safety tool 17 to the operation cord 7, first, the upper cap member 29 is inserted from the loop lower end 7 c side of the operation cord 7 as shown in FIGS. At this time, the operation cord 7 is inserted into the opening of the upper cap member 29 while the operation cord 7 is crushed. After the operation cord 7 is inserted, the code portions 7a and 7b are inserted into the code insertion portions 29a and 29b. Further, the cord portions 7a and 7b are separated from each other by the narrowed portion 29c.

  Next, as shown in FIGS. 16B to 16C, the main body member 18 is inserted from the loop lower end 7 c side of the operation cord 7. After the operation cord 7 is inserted, the code portions 7a and 7b are inserted into the code insertion portions 18a and 18b.

  Next, as shown in FIGS. 16C to 16D, the insertion portion 29 d is opened to the opening of the main body member 18 until the lower surface of the locking portion 29 e of the upper cap member 29 comes into contact with the upper opening edge of the main body member 18. The main body member 18 and the upper cap member 29 are connected by being pushed in.

  Next, as shown in FIG. 16 (d), the lower cap member 39 is attached to the loop lower end 7 c of the operation cord 7. At this time, the cord portions 7a and 7b are arranged in the cord insertion portions 39a and 39b, and the loop lower end 7c is arranged in the turning portion 39c.

  Next, as shown in FIGS. 16D to 16E, the insertion portion 39 d is pushed into the opening of the main body member 18 until the upper surface of the locking portion 39 e comes into contact with the lower opening edge of the main body member 18. Thus, the main body member 18 and the lower cap member 39 are connected.

  Through the above steps, the safety tool 17 can be attached to the operation cord 7. The safety tool 17 can be easily attached to the existing operation cord 7.

  When the safety tool 17 is attached to the operation cord 7, the cord portions 7 a and 7 b are covered by the length of the main body member 18. Therefore, depending on the length of the main body member 18 and the height from the floor to the loop lower end 7 c of the operation cord 7. The height to prevent the floor from being caught is defined, and it is possible to prevent an accident from occurring due to the foreign matter caught on the loop lower end 7c. Further, during operation, the shielding material can be moved up and down by holding the portion of the operation cord 7 exposed above the safety tool 17 and lowering the operation cord 7 without moving the safety tool 17.

1: Head box 2: Ladder tape 3: Slat 4: Bottom rail 5: Elevating cord 7: Operation cord 15: Cord gate 17: Safety tool 18: Body member 19: Cap member 20: Holding member 21: Hook member 22: Slide Member 29: Upper cap member 39: Lower cap member

Claims (10)

A safety tool attached to a loop-shaped operation cord suspended from a support member installed in a building,
The safety tool is disposed between the first and second cord portions, and the first and second cord portions, which are disposed between the first and second cord portions and the main body member that accommodates the first and second cord portions of the operation cord hanging from the support member. An engagement member that engages with
(1) The safety tool is configured to be manually movable along the first and second cord portions and configured to hold the operation cord by itself when not operated, or (2) the safety tool is first And a switching unit that enables switching between a state that is manually movable along the second code portion and a state that is not manually movable,
The engagement member is a safety tool configured such that a height position at which the engagement member engages with the first and second cord portions changes as the safety tool moves. The main body member has a strength that does not buckle when the main body member is moved along the first and second cord portions, and the first and second cord portions after receiving the first and second cord portions. The safety tool according to claim 1, wherein the first and second cord portions are covered so as not to escape from the body member. A cap member attachable to one end of the main body member;
The safety tool according to claim 1, wherein the engagement member is provided on the cap member. The safety tool according to any one of claims 1 to 3, wherein the engagement member includes a pulley that is rotatable relative to the main body member. The safety tool according to claim 4, wherein the pulley is movable relative to the main body member. The switching portion is a slide member having an engagement convex portion on an inner surface side and supported so as to be slidable along the longitudinal direction of the main body member. The safety according to any one of claims 1 to 5, wherein the safety tool is configured to allow the safety tool to be manually moved along the first and second cord portions by moving away the engaging projection. tool. The safety tool according to claim 1, wherein the safety tool is configured to have a predetermined height from the floor to prevent catching depending on a length of the main body member and a height from the floor to a lower end of the loop of the operation cord. Safety tool as described in any one. The safety tool includes a stopping unit that stops further lowering of the main body member when the lower end of the main body member reaches the lower end of the loop of the operation cord during the lowering operation of the main body member. Item 8. The safety tool according to any one of Items 7. A safety tool attached to a loop-shaped operation cord suspended from a support member installed in a building,
The safety tool includes a main body member that accommodates first and second cord portions of the operation cord hanging from the support member, an upper cap member that is coupled to the upper side of the main body member, and a lower side of the main body member And a lower cap member having a turning portion on which a lower end of the loop of the operation cord is disposed,
The upper cap member communicates the first and second cord insertion portions through which the first and second cord portions are inserted, and the first and second cord insertion portions, and is wider than the first and second cord insertion portions. Safety tool with a narrow constriction. The safety tool according to claim 9, wherein a width of the narrowed portion of the upper cap member is smaller than a diameter of the operation cord.