JP2557553Y2 - Auxiliary cord device for horizontal blinds - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to a ladder cord of a venetian blind. More specifically, the invention is hooked on a ladder drum and both ends are connected to the front and rear upper ends of the ladder cord body. This is related to the improvement of the auxiliary code to be used.

[Prior Art] A conventional method of hanging a ladder cord on a ladder ring is to form a knot at the front and rear upper ends of a ladder cord body as disclosed in Japanese Utility Model Application Laid-Open No. 63-127596 or the like. Connect the upper and lower ends of the cord body to both ends of the auxiliary cord to form a knot in the center of the auxiliary cord, and hook the knot on the locking part provided before and after the ladder ring so that the knot does not come off Was covered or crimped.

[Problem to be Solved by the Invention] The work of hanging the joint of the ladder cord on the latching part of the ladder ring so that it does not come off requires labor and skill, so it can be more easily hooked. Things were desired. The present invention addresses this need, and its purpose is to provide an auxiliary cord that can be hooked onto a ladder ring with one touch.

[Means for Solving the Problems] In order to achieve the above object, the present invention adopts
The open annular ladder ring is made of synthetic resin with high elasticity, and flanges are formed on the left and right sides of the outer peripheral surface of the ladder ring, and chord-shaped flat portions are formed in the center part, and the left and right flanges of the flat portion are axially pulled out. A stopper hole is provided, a synthetic resin fixing tool is formed at the center of the auxiliary cord, and a synthetic resin connecting tool is integrally formed at both ends, and the shape of the fixing tool is formed so as to conform to the flat portion. The protrusions that fit into the stop holes of the ladder ring are formed integrally on the left and right sides of the ladder ring.

[Function] When the auxiliary cord is set along the peripheral surface of the ladder ring and the center fixing device is pushed along the inner slope of the left and right flanges, the left and right flanges are elastically opened by a wedge action, and a flat fixing device is formed. Is seated on a flat portion between the left and right flanges, and the left and right protrusions fit into the left and right stopper holes. In this way, the auxiliary cord can be hooked onto the ladder ring very easily with one touch.

[Embodiment] The ladder hook of the present invention will be described based on an embodiment shown in the drawings.

As shown in FIGS. 1 and 2, a rotating shaft 11 having a rectangular cross section passes through the head box 10 of the horizontal blind in the longitudinal direction, and a ladder drum 36 is attached to the rotating shaft so as to rotate integrally therewith. A ladder ring 37 is fitted on the ladder drum 36 so as to be able to slip. The ladder ring 37 has an open ring shape, and the axial projection 39 of the release ring 38 enters the opening.
Release ring 38 is adjacent to rudder ring 37
Fits loosely into 36. The ladder drum 36, ladder ring 37, and release ring 38 are a drum holder fixed to the head box 10.
15 and cannot slide in the axial direction.
The drum holder 15 has an opening frame 41 at the bottom, and the opening frame fits into the bottom opening of the head box 10. Since the outer peripheral projection 42 of the release ring 38 contacts the stoppers 43 on both sides of the drum holder 15 as shown in FIG. 3, the release ring 38 can rotate only 180 degrees forward and backward.

The ladder ring 37 has left and right flanges 44, between which an auxiliary cord 45 is hooked. At the center of the auxiliary cord 45, a fixing member 46 made of synthetic resin is provided at both ends of a ladder cord body 50.
The connecting members 47 connected to the loops 51 at the front and rear upper ends are integrally formed. The auxiliary cord 45 is the opening frame of the drum holder 15.
Drop from 41.

As shown in FIGS. 4 to 6, the fixing member 46 at the center of the auxiliary cord 45 is a plate having projections 48 on the left and right sides, and the plate is located at the center of the peripheral surface between the flanges of the ladder ring 37. It matches the flat part 49 provided. Stop holes 52 are provided in the left and right flanges 44 sandwiching the flat portion 49, and the projections 48 of the fixing tool 46 fit into the stop holes. The ladder ring 37 is made of a synthetic resin with high elasticity, and the left and right flanges 44 are formed on the slopes, so that the left and right projections 48 of the fixing tool 46 of the auxiliary cord 45 are slightly aligned with the left and right flanges 44. When pressed strongly, the flange 44 elastically opens, the fixing tool 46 lands on the flat part 49, and the projection 48 fits into the stop hole 52.

As shown by the arrow in FIG. 2, when the rotating shaft 11 rotates to one side and the ladder drum 36 rotates, the ladder ring 37 also rotates, and the release ring passes through the axial projection 39 that has entered the opening. 38 rotates together. At this time, since one of the front and rear of the auxiliary cord 45 goes up and the other goes down, the front and rear of the ladder code 50 are shifted and the slat 30 tilts to one side. When the inclination of the slat 30 reaches the limit, the release ring 38 stops rotating when the outer peripheral projection 42 hits the stopper 43 of the drum holder 15. The axial projection 39 of the release ring 38, which has stopped rotating, prevents the rotation of the ladder ring 37 and opens the ladder ring 37 to reduce the frictional resistance to the ladder drum 36.

When the rotating shaft 11 is turned to the other side, the slat 30 tilts to the other side and when the limit is reached, the release ring 38 stops and the axial projection
39 stops rotation of rudder ring 37 and rudder ring 37
Open and reduce frictional resistance.

Since the attachment and detachment of the ladder cord main body 50 and the auxiliary cord 45 are extremely easy, the ladder cord main body and the slats can be removed from the head box for inspection and cleaning while the head box 10 is installed.

[Effects of the Invention] As described above, the auxiliary cord of the present invention is different from the conventional one in which the knot is hung on the ladder ring and caulked or a cover is attached so as not to come off. When the fixing device of the auxiliary cord is pushed in, the left and right flanges open elastically, and the left and right projections of the fixing device fit into the left and right stopper holes of the flange, so it can be extremely easily hooked to the ladder ring with one touch. It has a special effect.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a horizontal blind provided with an apparatus according to an embodiment of the present invention. FIGS. 2 and 3 are sectional views taken along lines II-II and III-III of FIG. 4 is a plan view of the ladder ring, FIG. 5 is a sectional view taken along the line VV of FIG. 4, and FIG. 6 is a developed view of the auxiliary cord. In the drawing, reference numeral 10 is a head box, 11 is a rotation axis, 15
Is a drum holder, 30 is a slat, 36 is a ladder drum, 37
Is a ladder ring, 44 is a flange, 45 is an auxiliary cord, 46 is a fixing tool, 47 is a connecting tool, 48 is a projection, 50 is a ladder cord main body, 52 is a stop hole, and 49 is a flat portion.

Claims (1)

(57) [Scope of request for utility model registration] 1. A head box (10), a rotary shaft (11) rotatably mounted on the head box, a ladder drum (36) mounted so as to rotate integrally with the rotary shaft, An open-loop ladder ring (37) externally slidably fitted to a ladder drum, an auxiliary cord (45) whose center is hooked on the ladder ring, and a ladder having front and rear upper ends connected to both ends of the auxiliary cord; In a horizontal blind having a cord body (50) and a slat (30) supported by the ladder cord body, flanges (44) are provided on the left and right sides of the ladder ring, and chord-shaped flat portions (49) are provided at the center of the peripheral surface. ) Are respectively formed, and stop holes (52) are formed in the left and right flanges of the flat portion in the axial direction so as to form a slope whose lower portion is closer to the center inside the left and right flanges above the stop holes, Serial supplementary code center made of synthetic resin fasteners (46) across a synthetic resin connecting member (47)
Are integrally formed, the fixing tool is formed into a flat plate shape that matches the left and right flat portions, and left and right projections (48) that fit into the left and right stop holes are integrally provided on the fixing tool. Blind auxiliary cord device.