JPH044471Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention 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, and lifts and lowers the slats. This invention relates to slats used in so-called horizontal blinds, which are equipped with lifting cords for lifting and lowering.

[Background of the idea]

Generally, horizontal blinds have a plurality of slats supported horizontally at one point above and below 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-like 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 blinds are opened and closed, by winding up and lowering the lifting cord. 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-shielding 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. There is also the problem that the tilting action of the slat is limited and therefore the slat 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 that is excellent in terms of performance and in which the slats can be tilted to a completely vertical position, the applicant of the present application first developed a horizontal blind that is capable of tilting the slats to a completely vertical position. A small hole is formed nearby through which the middle cord of the ladder-like support cord can be freely inserted, and a hole with 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. We have proposed a blind in which a guide groove is formed that opens at the side edge, and a guide ring is provided on the ladder-shaped support cord to guide the lifting cord. (Jitsugan 61-18938
[Problem to be solved by the invention] As mentioned above, a small hole is provided on both sides of the slat through which the middle cord of the ladder-like support cord can be inserted, and a guide groove is formed from this small hole to the side edge of the slat. A blind with a structure in which the lifting cords are arranged outside the side edges of the slats allows the slats to be easily attached and detached from the ladder-like support cords, and in particular, when the blind is assembled, the desired slats can be In addition, unlike conventional slats, there is no large lifting cord insertion hole in the center of the slats, so there is no light leakage when the blinds are closed, and they have an excellent appearance.
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. it is,
If a small hole through which a ladder-shaped support cord is inserted and a cord guide groove leading to the hole are provided near both side edges of the slat at positions corresponding to the longitudinal direction of the slat, the slat This is because the effective width of the slat is narrower than the width of other parts 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 parts of the slats that are not supported by the middle rung of the ladder-like support cords, that is, the longitudinal ends of the slats, the support cords, and the supports. As the sections between the cords move downward due to inertia, the slats as a whole tend to bend in a wavy manner. 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 grooves through which the middle cords of the support cords are inserted, the bending strength and rigidity of these parts are reduced, so that the lowering of the slats is difficult. When the slat is suddenly stopped, both ends of the slat bend sharply, then return to their original shape, and then bend in the opposite direction due to the reaction, creating a vibratory motion. If such operations are repeated, fatigue will concentrate on the weakened parts of the slat where the small holes and guide grooves are formed, and as a result, cracks will develop from the small holes toward the inside of the slat, eventually causing damage. The slat will break at this part.

[Purpose of invention]

The object of the present invention is to solve the above-mentioned problems and to provide a slat that does not easily break even during repeated lifting and lowering operations.

[Means for solving problems]

The present invention, as a means to solve the above-mentioned problems, 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, and In a slat used in a blind, in which a lifting cord for raising and lowering the slat is attached to the vertical cord portion of the ladder-shaped support cord, a ladder-shaped support is attached near both side edges of the slat at the position where it should be supported by the ladder-shaped support cord. A slat for blinds, characterized in that small holes through which the middle cord of the cord can be freely inserted are formed at positions shifted in the length direction of the slat, and guide grooves are formed extending from each small hole to the corresponding side edge. It provides:

〔Example〕

The present invention will be described below based on embodiments shown in the drawings.

Figure 1 is a front view showing a blind using the slats of the present invention, in which 1 is a head box;
2 is a lower plate, 3 is a slat, and 4 is a ladder-like support cord.

Blinds using the slats of the present invention are installed near both ends of the slats and, if necessary, in the middle.
At one or more positions (in the case shown, only near both ends), the ladder-like support cord 4 supports horizontally at a fixed interval vertically, and the vertical cord portions before and after the ladder-like support cord 4 4a,
The slat is tilted by a roller that moves 4a up and down relatively to adjust the light shielding.

Further, the lifting cord 5 for lifting and lowering the slats is inserted into a guide ring 4c provided vertically at regular intervals on one of the vertical cord parts 4a, 4a of the ladder-like support cord 4, and the lower end is fixed to the lower plate 2, and the upper end is fixed to the lower plate 2. is led into the headbox 1 and led out from near the end of the headbox 1 via a suitable stopper device 6 to form a lifting/lowering operation cord 7.

As shown in FIGS. 2 to 4, the slat 3 of the present invention has small holes 8, 8 provided near both side edges of the position supported by the ladder-like support cord 4, offset in the length direction of the slat. ing. The small holes 8, 8 are sized to allow the middle cord 4b of the ladder-like support cord 4 to be passed through, and slits are formed from these small holes 8, 8 to each side edge of the slat, and the middle cord 4b is inserted through the small holes 8, 8.
This serves as a guide groove 9 that guides the small holes 8 and 8.
(See Figure 3) To support the slat 3 configured as described above on the ladder-like support cord 4, place the slat 3 on the middle cord 4b of the ladder-like support cord 4, and place the slat 3 near both ends of the middle cord 4b. It is sufficient to insert it through the guide groove 9 into the elevator 6. (See Figure 4) [Function and Effect] As shown in Figure 6, near both side edges of the slat 3,
In the case of a slat provided with small holes 8, 8 through which the middle cord of the ladder-like support cord 4 is inserted, and a guide groove 9 extending from this to the corresponding side edge of the slat, in positions corresponding to the longitudinal direction of the slat, as described above, In addition, when the slat is raised and lowered, both longitudinal ends of the slat tend to bend significantly as shown in Figure 7. If the slat is repeatedly raised and lowered in this way, it bends from the small hole 8 toward the center of the slat. A crack runs in a straight line, and eventually the slat breaks at this part.

However, in the slat according to the present invention, the small holes and the guide grooves are provided offset in the longitudinal direction of the slat, so the spacing between the small holes 8 is larger than that shown in FIG. The shaped support cord 4b supports the slat diagonally (see Figure 4), thus preventing the slat from bending significantly at the middle cord as shown in Figure 7, and preventing the slat from dropping suddenly. Even in this case, the slat will curve gently as shown in FIG. Therefore, fatigue is not locally concentrated due to the lifting and lowering of the slat, and the slat can be used for a long period of time without breaking. Moreover, since the blind using the slat of the present invention does not have a lifting cord insertion hole in the slat, it has excellent light shielding properties, and since the lifting cord is located on the outside of the slat, the tilting of the slat is good. It can be easily removed and has a very high practical effect.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a blind using the slat of the present invention, Fig. 2 is a plan view showing the slat support state of the blind shown in Fig. 1, and Fig. 3 is a partially cutaway plan view showing the slat of the present invention. , Fig. 4 is an enlarged plan view of the slat shown in Fig. 2, Fig. 5 is a diagram showing the vibration state of the slat of the present invention when it is raised and lowered, and Fig. 6 is a diagram showing the slat proposed earlier by the present inventor. The partially cutaway plan view of FIG. 7 is a view showing the vibration state of the slat shown in FIG. 6 when it is raised and lowered. 1...Head box, 2...Lower plate, 3...Slat, 4...Ladder-like support cord, 5...Elevating cord, 6...Stopper, 7...Elevating operation cord, 8...Small hole, 9... ...Guide groove.

Claims (1)

[Scope of utility model registration request] A plurality of slats are supported horizontally by ladder-like support cords near both ends of the slats and, if necessary, at an intermediate position, and an elevating cord for raising and lowering the slats is attached to the vertical cord portion of the ladder-like support cord. In the slats used in the installed blinds, at the positions to be supported by the ladder-like support cords, small holes are formed near both side edges of the slats through which the middle cords of the ladder-like support cords can be freely inserted. A slat for a blind, characterized in that guide grooves are formed at positions shifted in the length direction and extend from each small hole to the corresponding side edge.