JPH0436400Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention horizontally supports a plurality of slats by means of ladder-like support cords near both ends of the slats and, if necessary, at an intermediate position. This invention relates to a slat used in a so-called horizontal blind, which is equipped with a lifting cord for lifting and lowering.

[Background of the idea]

In general, horizontal blinds have a plurality of slats supported horizontally at regular intervals vertically by ladder-like support cords near each end of the slats and, if necessary, at one or more locations in between. By moving the front and rear vertical cord portions of this ladder-shaped support cord relatively up and down, the slats are tilted to adjust the light shielding, and light is inserted through the lifting cord insertion hole provided in the center of each slat. A lifting cord is passed vertically, its lower end is fixed to a lower plate placed at the lower end of the row of slats, and the slats are raised and lowered, that is, the blind is opened and closed, by winding the lifting cord upward or downward. It is configured as follows.

As mentioned above, the above-mentioned elevating cord has the function of controlling the elevating and lowering of the slats, and because it extends vertically through the elevating cord insertion hole provided at the same position on each slat, it also controls the horizontal movement of each slat. It also plays the role of regulating the slats and aligning a large number of slats in the vertical direction.

However, in the structure of the conventional horizontal blind as described above, when the slats are tilted to a vertical position, outside light leaks into the room through the elevating cord insertion hole, impairing the light blocking function of the blind. Furthermore, it is not desirable in terms of the appearance of the blind that a large number of elevating cord insertion holes are visible over the entire surface of the blind when the blind is closed. In addition, in the conventional structure where the lifting cord passes through the lifting cord insertion hole provided in each slat, when the slat is tilted, the edge of the lifting cord insertion hole of each slat hits the lifting cord. hand,
Another problem is that the tilting motion of the slats is limited, so that the slats cannot be tilted to a completely vertical position. In the horizontal blinds of the above type, the lifting cord insertion hole that was conventionally provided in the center of the slats has been eliminated to prevent external light from leaking when the slats are tilted, and since no holes are visible on the surface of the slats, the appearance In order to form a horizontal blind which is excellent in terms of performance and also allows the slats to be tilted to a completely vertical position, the applicant of the present application first proposed a horizontal blind system in which the slats were placed near both side edges of the slats at positions to be supported by ladder-like support cords. A small hole is formed through which the middle cord of the ladder-like support cord can be inserted freely, and a width approximately equal to or slightly narrower than the diameter of the middle cord extends from each small hole to the corresponding side edge. A guide groove opening is formed,
Furthermore, a blind was proposed in which the ladder-like support cord was provided with a guide ring for guiding the lifting cord (Utility Application No. 18938/1983).

[Problem that the invention attempts to solve]

As described above, small holes are provided on both side edges of the slat through which the middle cord of the ladder-like support cord can be inserted, and a guide slot is formed from this small hole to the side edge of the slat, and the lifting cord is placed on the side of the slat. Blinds with a structure placed outside the edge can easily attach and detach the slats to the ladder-like support cord, and in particular, when the blind is assembled, it is easy to attach and detach only the desired slats. Because there is no large lifting cord insertion hole in the center of the slats like in the slats, there is no light leakage when the blinds are closed, and the appearance is excellent.
Although it has many advantages, such as the ability to tilt the slats to a fully vertical position, it has been found that there are significant drawbacks. If a small hole through which a ladder-shaped support cord is inserted and a cord guide slot leading to the hole are provided near both side edges of the slat, the effective width of the slat will be larger than that of the slat at the position where the small hole and slot are provided. This is because the width of the slat is narrower than the width of the slat, and therefore the bending strength and rigidity of the slat in the longitudinal direction are lower in this part than in other parts.

Generally, in horizontal blinds, if the slats are suddenly stopped midway through their descent, the portions of the slats that are not supported by the middle cords of the ladder-like support cords, that is, the longitudinal ends of the slats and the support cords, will be damaged. The slats generally tend to bend in a wavy manner as the sections between the support cords move downward due to inertia. In particular, since there is no support cord at the end of the slat in its longitudinal direction, there is a tendency for the slat to bend at the middle cord of the support cord that supports the weight of the slat. However, as mentioned above, in the above-mentioned blinds in which the slats are provided with small insertion holes and guide slots through which the middle cord of the support cord is inserted, the bending strength and rigidity of these parts are reduced, so the slats are When the slat suddenly stops descending, both ends of the slat bend sharply, and if this operation is repeated, the part of the slat where the small holes and slots are formed will become locally fatigued, causing the small holes to bend. Cracks develop inward from the slat, and the slat eventually breaks at this point.

[Purpose of invention]

The present invention solves the above-mentioned drawbacks in the slat for blinds, which has a small hole on both side edges of the slat through which the middle cord of the ladder-like support cord is inserted, and a slot for guiding the middle cord. It is an object of the present invention to provide a slat for a blind which prevents the slat from cracking and breaking at the portion where the small holes and guide grooves are provided.

[Means for solving problems]

The present invention, as a means to solve the above-mentioned problems, supports a plurality of slats horizontally by means of ladder-like support cords near both ends of the slats and, if necessary, at an intermediate position therebetween, and also raises and lowers the slats. In a slat used for a blind in which a lifting cord is attached to a vertical cord portion of the ladder-shaped support cord outside one side edge of the slat, at least one of the positions to be supported by the ladder-shaped support cord. A protruding portion having an opening passing through the slat in the direction of the slat side edge is provided near the side edge of the convex side of the slat, and a guide groove extending from the opening to the slat side edge is provided so as to connect the middle cord portion of the ladder-like support cord. To provide a slat for a blind, characterized in that it can be introduced into the opening of the protrusion from the guide groove.

〔Example〕

The following will explain the embodiments shown in the drawings.

Fig. 2 is a front view showing a blind using the slats of the present invention. In the figure, 1 is the head box of the blind, 2 is the lower plate, 3 is the slat, 4 is a ladder-like support cord, 5 is a lifting cord, and 6 is a rotation. The control stick is shown.

In the illustrated blind, a plurality of slats 3 are supported horizontally near both ends by ladder-like support cords 4, 4. ), the rotating drum is rotated by a rotating operating mechanism (rotating operating rod in the illustrated case) 6 that hangs down from the head box via a rotating shaft, a transmission gear, etc.
The vertical cord portions of the ladder-like support cords 4, 4 are moved up and down relative to each other to tilt the slat.

On the other hand, the lower end of the lift cord of the blind is fixed to the lower plate 2 disposed at the lowest part of the slat group, and passes upward through the lift cord insertion ring 7 formed on one of the vertical cord parts of the ladder-like support cord 4. The head is guided into the head box 1, and is led out of the head box from near one end of the head box via a suitable stopper device to form the lifting/lowering operation section 9.

FIG. 1 is a partial plan view showing one embodiment of the slat of the present invention, in which protrusions 10 are formed near both side edges of the position supported by the ladder-like support cord. As shown in a cross-sectional view in FIG. 3 and a perspective view in FIG. The cord portion 4b is slightly larger than the middle cord portion 4b so that the cord portion 4b can pass freely. A guide groove 12 is also provided extending from this opening 11 to the side edge of the slat. This guide groove 12 is constituted by a slit having a width smaller than that of the middle cord portion 4b, so that the middle cord portion 4b of the ladder-like support cord 4 can be introduced from the guide groove 12 into the opening 11 of the protrusion 10. It's summery.

When assembling a blind by combining the above slats with the ladder-like support cord 4, the steps shown in FIGS.
As shown in the figure, the slat 3 is placed on the middle cord portion 4b of the ladder-like support cord 4, and the vicinity of both ends of the middle cord portion 4b are introduced into the opening 11 of the protrusion 10 through the guide groove 12. At this time, the width of the guide groove 12 is smaller than the diameter of the middle cord part, but since the slat itself is made of a thin flat plate of 0.15 to 0.2 mm, the slats on both sides of the guide groove 12 are By bending, the width of the guide groove 12 expands, allowing the middle cord portion to pass through.

Note that it is not necessary to provide a pair of the protruding portions 10 and guide grooves 12 near both side edges of the position supported by the ladder-like support cord, and they may be provided only on one side as shown in FIG. In this case, it is preferable to provide them on opposite side edges near both ends.

Further, the guide groove 12 does not necessarily have to be provided from the center of the protrusion 10, but may be offset as shown in FIG.

〔effect〕

Since the slat of the present invention has the above-mentioned structure, the slat does not bend downward at an acute angle from the point where it is supported by the middle cord portion even if the slat stops lowering during repeated lifting operations, and the protruding portion Since the slats are reinforced, they bend gently, so the slats will not be cut or damaged. However, if the slat of the present invention is used, when the slat is tilted to the vertical position, the blind does not have a lifting cord insertion hole, so there is no leakage of outside light, and since the lifting cord is outside the row of slats, the lifting cord cannot be used. The side edge of the insertion hole of the slat comes into contact with the slat, and rotation is not hindered, and a blind can be easily replaced when the slat is damaged.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view showing an embodiment of the slat for blinds of the present invention, Fig. 2 is a front view showing a blind using the slat for blinds of the present invention, and Fig. 3 is a cross section taken along the line - - in Fig. 1. 4 is a diagram showing the engagement state of the slat and the ladder-shaped support cord, and FIG. 5 is a sectional view showing the same state as FIG. 4.
FIG. 6 is a partially cutaway perspective view showing the slat of the present invention, and FIGS. 7 and 8 are plan views showing other embodiments of the slat of the present invention. DESCRIPTION OF SYMBOLS 1...Head box, 2...Lower plate, 3...Slat, 4...Ladder-like support cord, 5...Elevating and lowering cord, 6...Rotating operation rod, 7...Ring, 9...Elevating and lowering operation section, 10 ...Protrusion, 11...Opening, 12...
...Guide groove.

Claims (1)

[Scope of utility model registration request] By means of ladder-like support cords near the ends of the slats and, if necessary, at intermediate positions,
A ladder-shaped slat is used for a blind in which a plurality of slats are supported horizontally, and a lifting cord for raising and lowering the slats is attached to a vertical cord portion of the ladder-shaped support cord outside one side edge of the slat. At least one of the positions to be supported by the support cord is provided with a protrusion having an opening extending through the slat toward the side edge of the slat near the side edge of the convex side of the slat, and extending from the opening to the side edge of the slat. A slat for a blind, characterized in that a guide groove is provided so that the middle cord of the ladder-like support cord can be introduced from the guide groove into the opening of the protrusion.