JPH04232Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention relates to a mounting structure for attaching the lower ends of a ladder cord and a lifting cord of a blind to a bottom rail.

(Prior Art) Conventionally, there is a connection structure for connecting the lower ends of a lifting cord and a ladder cord to a bottom rail, as shown in FIG. 4, for example. That is, the lifting cord insertion holes 2 and 3 are formed on the upper and lower surfaces of the cylindrical bottom rail 1, and the lower insertion hole 3 is larger than the upper insertion hole 2, and the lifting cord 4 is inserted into both insertion holes 2 and 3. The same lifting cord 4 with the inserted state
By making a knot 5 at the lower end and locking the knot 5 into the insertion hole 2 within the bottom rail 1, the bottom rail 1 is suspended and supported from the lower end of the lifting cord 4. Further, the lower ends of both warp threads of the ladder cord 6 are tied together, and with the knot 7 positioned in the insertion hole 3, a locking fitting 8 is attached to the bottom rail 1 from below.
It is connected to the bottom rail 1 by fitting.

(Problem to be solved by the invention) Lifting cord 4 and ladder cord 6 as described above
In order to drill the lifting cord insertion holes 2 and 3 in the bottom rail 1, the connection structure is as follows: To drill the lifting cord insertion holes 2 and 3 in the bottom rail 1, use a drill whose tip is formed to have a diameter corresponding to the insertion hole 2 and the middle portion is formed to a diameter corresponding to the insertion hole 3. Holes were drilled from the bottom side of bottom rail 1. However, the insertion holes 2 and 3 that are drilled in this manner tend to have burrs on the top surface of the bottom rail 1, and it is necessary to remove the burrs after drilling the insertion holes 2 and 3, and the positions of the insertion holes 2 and 3 are It is necessary to accurately position the ladder cord 6 and the lifting cord 4, and the locking fitting 8 is fitted to the bottom rail 1 with the knot 7 of the ladder cord 6 positioned in the insertion hole 3. The problem was that the work was extremely complicated.

Structure of the invention (means for solving the problem) In order to solve the above problem, this invention provides a groove on the bottom surface of the bottom rail along the longitudinal direction of the bottom rail, and a groove in the deep part of the groove. A configuration is adopted in which a step is formed to increase the width, and the ladder cord is locked to the bottom rail by a locking tool that is inserted into the groove and has a protrusion that engages with the step.

(Function) With the above configuration, the locking tool is fitted into the groove along the longitudinal direction of the bottom rail, and the ladder cord is locked to the bottom rail. Since the locking tool is provided with a protrusion that engages with the step, the ladder cord will not come off the bottom rail due to the locking tool falling.

(Embodiment) An embodiment embodying this invention will be described below with reference to the drawings. As shown in FIG. Slut 1
4 is suspended and supported, and a bottom rail 15 is suspended and supported from the lowest stage of the ladder cord 13.
The upper end of the ladder cord 13 is the head box 1.
An operating rod 16 is supported by an angle adjustment shaft (to be described later) within the head box 12 and is suspended from one side of the head box 12.
By rotating the slats 14, the angles of each slat 14 can be adjusted in the same phase via the ladder cord 13.

A lifting cord 17 is passed through each slat 14 near the support portion of the ladder cord 13,
One end of the lifting cord 17 is connected to the bottom rail 15, and the other end is connected to the head box 12.
After being guided in one direction, it is suspended near the operating rod 16 at one end of the head box 12. Each slat 14 can be raised or lowered by operating the lift cord 17 to raise or lower the bottom rail 15.

Next, the attachment structure of the ladder cord 13 and the elevation cord 17 to the bottom rail 15 will be explained according to FIGS. 1 and 2. The bottom rail 15 has a groove 18 formed on its lower surface over the entire length in the longitudinal direction. A step 19 is formed in the inner part of the groove 18, that is, in the upper part, so that the groove width becomes larger. A lifting cord 17 is installed at an appropriate position on the top surface of the bottom rail 15.
An insertion hole 20 is formed for inserting the.
The insertion hole 20 is bored from above the bottom rail 15 using a drill or the like.

A locking tool 21 for locking the lower end of the ladder cord 13 to the bottom rail 15 is molded from synthetic resin.
A pair of locking pieces 23 protrude upward from the left and right sides of the base 22. The width of the locking piece 23 is formed to be almost the same as the width of the groove 18 of the bottom rail 15, so that it can be fitted into the groove 18, and the front and rear ends of the locking piece 23 have arrowhead-shaped protrusions that engage with the step 19. A portion 24 is formed. Further, a recess 25 is formed in the center of the opposing inner surfaces of both locking pieces 23, and a groove 26 is formed vertically in the center of the recess 25, and the locking piece 23 is given elasticity in its width direction so that it can easily fit into the groove 18 of the bottom rail 15.

A locking groove 27 is formed in the center of the base 22 in the left and right direction, and the locking tool 21 is inserted into the groove 18 of the bottom rail 15.
When fitted, the ladder cord 13 is sandwiched between the locking groove 27 and the bottom rail 15.

In order to connect the lower ends of the ladder cord 13 and the lifting cord 17 to the bottom rail 15 configured as described above, first insert the lifting cord 17 into the insertion hole 20 from above the bottom rail 15, and then connect the lower end of the lifting cord 17 to the bottom rail 15 configured as described above. A knot 28 is provided and the knot 28 is
is engaged with the insertion hole 20. On the other hand, the lower end of the warp of the ladder cord 13 is tied below the bottom rail 15, and with the knot 29 positioned between the locking pieces 23 of the locking tool 21, the locking pieces 23 of the locking tool 21 are connected to the bottom rail. 15 into the groove 18 and the protrusion 24 of the locking piece 23 is engaged with the step 19 in the groove 18 as shown in FIG. 1, the locking tool 21 is stably held in this state. and the lower end of ladder cord 13 is in groove 1.
8 and the locking tool 21 so as not to be movable.
Then, by operating the operating rod 16, the ladder code 1 is
3, the angle of each slat 14 is adjusted in the same phase. At this time, since the bottom rail 15 is connected to the ladder cord 13 near the center of its lower surface, as the slat 14 tilts, the angle of each slat 14 is adjusted in the same phase. is also definitely tilted.

As described above, the mounting structure of the ladder cord 13 and the lifting cord 17 of this embodiment is as follows.
is inserted into the insertion hole 20 from above the bottom rail 15 and a knot 28 is provided at its lower end, so that the lifting cord 17 can be easily connected to the bottom rail 15, and the knot at the lower end of the warp of the ladder cord 13 can be connected easily. 29 is positioned in the groove 18 and between the locking pieces 23 of the locking tool 21, and when the locking tool 21 is fitted into the groove 18 of the bottom rail 15, the lower end of the ladder cord 13 is connected to the bottom rail 15. Can be easily connected. Then, the locking tool 21 is connected to the groove 1.
8, the locking tool 21 can be fitted to the bottom rail 15 very easily with the knot 29 at the lower end of the ladder cord 13 positioned within the groove 18. After fitting, the base portion 22 is only exposed on the lower surface of the bottom rail 15, which is aesthetically pleasing. Furthermore, since the insertion holes 20 of the bottom rail 15 are drilled from above the bottom rail 15 using a drill or the like, burrs do not form on the top surface of the bottom rail 15, and therefore, the process for removing burrs can be omitted. .

Effects of the invention As detailed above, this invention provides a groove along the longitudinal direction of the lower surface of the bottom rail, and the locking tool is inserted into this groove, so the locking tool can be inserted from below. The ladder cord can be easily locked to the bottom rail of the blind by simply fitting it in the same way, and a step is formed at the back of the groove to make the groove wider.
Since the locking tool is formed with a protrusion that engages with the step, an excellent effect is achieved in that the fitted locking tool will not fall out and the ladder cord will not come off the bottom rail of the blind.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the connection structure of the ladder cord and lifting cord that embodies this invention, Figure 2 is an exploded perspective view thereof, Figure 3 is a front view of a blind related to this invention, and Figure 4 is this FIG. 2 is a sectional view showing a conventional example of the invention. Ladder code...13, bottom rail...1
5, Lifting cord...17, Groove...18, Insertion hole...
...20, Locking tool...21.

Claims (1)

[Scope of utility model registration request] The same bottom rail 15 is attached to the bottom surface of the bottom rail 15.
A groove 18 is provided along the longitudinal direction of the groove 18, and a step 19 is formed at the back of the groove 18 so that the width of the groove becomes larger. A structure for attaching a ladder cord to the bottom rail of a blind, characterized in that the ladder cord 13 is locked to the bottom rail 15 by a locking tool 21.