Cord adjuster and method for adjusting the length of hanging cord

Abstract

To provide a cord adjuster which can prevent a hanging cord from being removed from a lateral groove and a vertical groove to enable a loop part to be wound easily and smoothly, and to provide a hanging cord length adjustment method.SOLUTION: A cord adjuster 1 includes: an adjuster body 2; and a cord stopper 3 which is attached to the adjuster body 2. The cord stopper 3 includes: a cylindrical peripheral wall 31; a vertical slit 32 which is cut from an upper end to a lower end of the peripheral wall 31; and a taper part 33 which is formed at an upper end of the peripheral wall 31 and in which a diameter decreases to a lower side. In a state that the vertical slit 32 is fitted oriented to the other side surface side of a shaft part 5 on an outer peripheral surface of the shaft part 5, a loop part 13a of the hanging cord 13 protruding from the other side surface of the shaft part 5 protrudes from the vertical slit 32. A lower opening portion of the vertical groove 52 on one side surface of the shaft part 5 is closed by the peripheral wall 31 and the loop part 13a of the hanging cord protruding from the vertical slit 32 is wound around an outer peripheral surface of the cord stopper 3.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cord adjuster for adjusting the length of a hanging cord of a lighting fixture extending downward from a hook-on ceiling cap, and a method for adjusting the length of the hanging cord. [Background technology]

[0002] A known conventional cord adjuster has a shaft portion around which the hanging cord is bent into a loop and the loop portion is wound, which is provided on the underside of a clamping portion that fits into a hook-on ceiling cap (Patent Document 1). This shaft portion has a vertical groove that opens on one side of the shaft portion and extends vertically to allow the hanging cord to pass through, and a horizontal groove that opens vertically on the other side of the shaft portion and also opens horizontally in a Y-shape on the front side of the shaft portion and communicates with the vertical groove to bend the hanging cord that is to be passed through the vertical groove into a loop and cause the loop portion to protrude to the other side of the shaft portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-33859 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional cord adjuster, the hanging cord bent to form the loop portion is prone to slip out of the horizontal and vertical grooves due to the elasticity of the cord, making it difficult to wind the loop portion around the shaft because the hanging cord slips out of the horizontal and vertical grooves.

[0005] The present invention has been made in consideration of the above circumstances, and has as its object to provide a cord adjuster and a method for adjusting the length of a hanging cord that prevents a hanging cord having a loop portion formed therein from escaping from the horizontal or vertical grooves, making it possible to easily and smoothly wind the loop portion. [Means for solving the problem]

[0006] The cord adjuster according to the present invention comprises: A cord adjuster for adjusting the length of a hanging cord of a lighting fixture extending downward from a hook-on ceiling cap, The device includes an adjuster body and a cord stopper that is attached to the adjuster body. The adjuster body is composed of a clamping part that is fitted into the hook-on sealing cap and a shaft part formed on the underside of the clamping part, The shaft portion has a vertical groove that opens on one side of the shaft portion, extends vertically, and allows a hanging cord to pass through, and a horizontal groove that opens vertically on the other side of the shaft portion, opens horizontally in a Y-shape on the front side of the shaft portion, and communicates with the vertical groove to bend the hanging cord that passes through the vertical groove into a loop so that the loop portion protrudes to the other side of the shaft portion, The cord stopper has a cylindrical peripheral wall, a vertical slit cut from an upper end to a lower end of the peripheral wall, and a tapered portion formed at the upper end of the peripheral wall and tapering downward, The cord stopper is configured such that, with the vertical slit fitted into the outer peripheral surface of the shaft portion toward the other side of the shaft portion, the loop portion of the hanging cord protruding from the other side of the shaft portion protrudes from the vertical slit of the cord stopper, the lower opening portion of the vertical groove on one side of the shaft portion is blocked by the peripheral wall of the cord stopper, and the loop portion of the hanging cord protruding from the vertical slit is wrapped around the outer peripheral surface of the cord stopper.

[0007] The method for adjusting the length of a hanging cord according to the present invention includes the steps of: A method for adjusting the length of a hanging cord of a lighting fixture extending downward from a hanging ceiling cap by using a cord adjuster, comprising: The cord adjuster includes an adjuster body and a cord stopper attached to the adjuster body, The adjuster body is composed of a clamping part that is fitted into the hook-on sealing cap and a shaft part formed on the underside of the clamping part, The clamping portion has a pair of side plates that clamp the side surfaces of the hook-on sealing cap, and a hook claw protruding from the outer surface of each side plate, The shaft portion has a vertical groove that opens on one side of the shaft portion, extends vertically, and allows a hanging cord to pass through, and a horizontal groove that opens vertically on the other side of the shaft portion, opens horizontally in a Y-shape on the front side of the shaft portion, and communicates with the vertical groove to bend the hanging cord that passes through the vertical groove into a loop so that the loop portion protrudes to the other side of the shaft portion, The cord stopper has a cylindrical peripheral wall, a vertical slit cut from an upper end to a lower end of the peripheral wall, a tapered portion formed at the upper end of the peripheral wall and tapering downward, and up-down direction markings provided on the peripheral wall, Adjusting the length of the loop portion of the hanging cord to adjust the hanging cord extending from the lighting fixture to a desired hanging length; According to the mark, the cord stopper is fitted around the outer periphery of the shaft portion by guiding the tapered portion from the underside of the shaft portion and by facing the vertical slit toward the other side of the shaft portion, so that the loop portion of the hanging cord protruding from the other side of the shaft portion protrudes from the vertical slit of the cord stopper, and the lower opening of the vertical groove on one side of the shaft portion is closed by the peripheral wall of the cord stopper. The loop portion of the hanging cord protruding from the vertical slit is wound around the outer circumferential surface of the cord stopper fitted to the shaft portion, A retaining ring having rubber elasticity attached to the loop portion of the hanging cord is placed across the underside of the shaft and hooked onto hook claws on one side plate of the adjuster body and hook claws on the other side plate to maintain the wound state of the loop portion of the hanging cord. Effect of the Invention

[0008] According to the present invention, by attaching a cord stopper to the shaft of the adjuster body, the hanging cord folded to form the loop portion is prevented from escaping from the horizontal and vertical grooves of the shaft portion due to the elasticity of the cord, and the formed state of the loop portion can be stably maintained. In addition, the work of winding the loop portion of the hanging cord can be easily and smoothly performed. Therefore, the length of the hanging cord can be easily and smoothly adjusted, and the length of the hanging cord that has been adjusted can be stably maintained. [Brief description of the drawings]

[0009] [Figure 1] 1 is an exploded perspective view showing a lighting fixture to which a cord adjuster according to an embodiment is applied; [Diagram 2] FIG. 2 is a perspective view showing an adjuster body and a cord stopper of the cord adjuster according to the embodiment. [Diagram 3] 13A to 13C are diagrams for explaining the relationship between the shaft portion of the adjuster body and the cord stopper, where FIG. 13A is a side view, FIG. 13B is a bottom view, and FIG. 13C is a side view of the cord stopper attached. [Figure 4] 1 is a perspective view illustrating a cord length adjusting method using a cord adjuster according to an embodiment; FIG. [Diagram 5] 11 is a perspective view showing a state in which the cord length is adjusted using the cord adjuster according to the embodiment and then covered with a sealing cover and a ring. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a lighting fixture 10 to which the cord adjuster 1 of this embodiment is applied. This lighting fixture 10 includes a hook-on ceiling cap 12 connected to a hook-on ceiling body 11 attached to a ceiling, a hanging cord 13 extending downward from the hook-on ceiling cap 12, a socket 14 connected to the hanging cord 13, a lamp 15 screwed into the socket 14, a ring 16 and a ceiling cover 17 for covering the hook-on ceiling body 11 and the hook-on ceiling cap 12, and a shade 18 for covering the lamp 15.

[0011] The cord adjuster 1 of this embodiment is attached below the hook-on ceiling cap 12 to adjust the length of the hanging cord 13, and includes an adjuster body 2 and a cord stopper 3 attached to the adjuster body 2. As shown in Figures 2 and 3, the adjuster body 2 is composed of a U-shaped clamping part 4 that fits into the hook-on ceiling cap 12, and a cylindrical shaft part 5 formed on the underside of the clamping part 4.

[0012] The clamping portion 4 includes a pair of side plates 41 that clamp the sides of the hook-on ceiling cap 12, and a lower plate 42 that connects the lower ends of the side plates 41. A hook claw 43 protrudes from the outer surface of each side plate 41, and in this embodiment, two hook claws 43 are provided at different height positions on each side plate 41. The lower plate 42 is provided with a notch 44 through which the hanging cord 13 extending from the hook-on ceiling cap 12 passes.

[0013] The shaft portion 5 is formed with a vertical groove 51 that opens on one side of the outer circumferential surface of the shaft portion 5, extends vertically, and inserts the hanging cord 13, and a horizontal groove 52 that opens up and down on the other side of the outer circumferential surface of the shaft portion 5, opens horizontally in a Y-shape on the front of the shaft portion 5, and communicates with the vertical groove 51 to bend the hanging cord 13 inserted into the vertical groove 51 into a loop so that the loop portion 13a protrudes to the other side of the shaft portion 5. The horizontal groove 52 is composed of a horizontal groove 53 that opens on the other side of the shaft portion 5 and extends horizontally, and an upper inclined groove 54 and a lower inclined groove 55 that branch up and down from the end of the horizontal groove 53 and open on the other side of the shaft portion 5. A triangular prism-shaped convex portion 56 is provided on the other side of the horizontal groove 52, and the upper inclined groove 54 and the lower inclined groove 55 are formed by this convex portion 56.

[0014] The cord stopper 3 has a cylindrical peripheral wall 31 that is fitted onto the outside of the cylindrical shaft portion 5, a vertical slit 32 cut from the upper end to the lower end of the peripheral wall 31, a tapered portion 33 formed at the upper end of the peripheral wall 31 and decreasing in diameter downward, and a U-shaped groove 34 formed at the upper end of the peripheral wall 31 at a position opposite the vertical slit 32 and serving as a marker for the upper position of the cord stopper 3. This cord stopper 3 is configured such that, with the vertical slit 32 fitted into the outer circumferential surface of the shaft portion 5 toward the other side of the shaft portion 5, the loop portion 13a of the hanging cord 13 protruding from the other side of the shaft portion 5 protrudes from the vertical slit 32 of the cord stopper 3, the lower opening portion of the vertical groove 51 on one side of the shaft portion 5 is closed by the peripheral wall 31 of the cord stopper 3, and the loop portion 13a of the hanging cord 13 protruding from the vertical slit 32 is wound around the outer circumferential surface of the cord stopper 3.

[0015] Next, a method for adjusting the length of the suspension cord 13 using the cord adjuster 1 will be described. 4(a), first, the adjuster body 2 is attached to the hook-on ceiling cap 12, and the hanging cord 13 extending from the hook-on ceiling cap 12 is placed in the vertical groove 51 of the shaft 5, bent into a loop, and pushed into the horizontal groove 52. At this time, the length of the loop portion 13a of the hanging cord 13 protruding from the other side of the shaft 5 is adjusted to adjust the hanging cord 13 extending downward to the lamp 15 to the desired hanging length.

[0016] Next, the cord stopper 3 is inserted and fitted onto the outer circumferential surface of the shaft portion 5, with the upper end side of the peripheral wall 31 where the U-groove 34 is marked facing the underside of the shaft portion 5 and the vertical slit 32 facing the other side side of the shaft portion 5, while guiding the tapered portion 33 from the underside of the shaft portion 5, so that the loop portion 13a of the hanging cord 13 protruding from the other side side of the shaft portion 5 protrudes from the vertical slit 32 of the cord stopper 3, and the lower opening of the vertical groove 51 on one side side of the shaft portion 5 is closed by the peripheral wall 31 of the cord stopper 3. Also, a silicone rubber band (retaining ring) 6 is attached to the loop portion 13a of the hanging cord 13.

[0017] Then, as shown in Fig. 4(a)(b), the loop portion 13a of the hanging cord 13 protruding from the vertical slit 32 of the cord stopper 3 is wound around the outer circumferential surface of the cord stopper 3 fitted into the shaft portion 5, and the rubber band 6 is hooked to the hook claw 43 of the adjuster body 2. At this time, as shown in Fig. 4(b)(c), the rubber band 6 is placed over the underside of the shaft portion 5 and hooked to the hook claw 43 of one side plate 41 of the adjuster body 2 and the hook claw 43 of the other side plate 41, so that the loop portion 13a of the hanging cord 13 is kept wound. The rubber band 6 is hooked to one of the two hook claws 43 at different heights so that the hanging cord 13 of the loop portion 13a does not loosen. This makes it possible to stably maintain the wound state so that the wound cord portion does not slip off or come undone.

[0018] After this, as shown in Figure 5, the ring 16 and the ceiling cover 17 are arranged to hide the hook-on ceiling body 11, the hook-on ceiling cap 12, the cord adjuster 1 and the portion of the hanging cord 13 wrapped around the cord adjuster 1, and the work is then completed.

[0019] As described above, according to the cord adjuster 1 of this embodiment, by attaching the cord stopper 3 to the shaft portion 5 of the adjuster main body 2, the hanging cord 13 bent to form the loop portion 13a is prevented from escaping from the horizontal groove 52 or the vertical groove 51 due to the elasticity of the cord, and the formed state of the loop portion 13a can be stably maintained. Therefore, when winding the loop portion 13a of the hanging cord 13, the hanging cord 13 does not escape from the horizontal groove 52 or the vertical groove 51, and the winding operation of the loop portion 13a can be easily and smoothly performed. Furthermore, the length of the hanging cord 13 whose length has been adjusted can be stably maintained. In addition, since the lower opening portion of the vertical groove 51 on one side surface of the shaft portion 5 is closed by the peripheral wall 31 of the cord stopper 3, the hanging cord 13 does not escape from the lower opening portion of the vertical groove 51, and can be maintained in a state bent downward. Therefore, when winding the loop portion 13a of the hanging cord 13, the lower portion of the cord does not get in the way, and the winding operation of the loop portion 13a can be performed easily and smoothly.

[0020] Furthermore, by attaching the cord stopper 3 to the shaft portion 5 of the adjuster body 2, the outer peripheral surface of the shaft portion 5, which is recessed by the vertical grooves 51 and horizontal grooves 52, can be made into a smooth outer peripheral surface by the peripheral wall 31 of the cord stopper 3. Therefore, when winding the loop portion 13a of the hanging cord 13 around the outer peripheral surface of the cord stopper 3, the winding operation of the loop portion 13a can be performed easily and smoothly without getting caught in the vertical grooves 51 or horizontal grooves 52.

[0021] As described above, the length of the hanging cord 13 can be easily and smoothly adjusted, and further, the length of the hanging cord 13 after the adjustment can be stably maintained.

[0022] Furthermore, the triangular protrusion 56 provided on the other side of the lateral groove 52 of the shaft portion 5 to form the upper inclined groove 54 and the lower inclined groove 55 of the lateral groove 52 protrudes beyond the other side of the shaft portion 5 and is set to a protruding height d at which the slit end 32a of the vertical slit 32 of the cord stopper 3 attached to the shaft portion 5 abuts (see Figs. 3(a) and (c)). This allows the protrusion 56 to position and prevent the cord stopper 3 attached to the shaft portion 5 from rotating. Therefore, the vertical slit 32 of the cord stopper 3 is prevented from compressing the loop portion 13a of the hanging cord 13 protruding from the lateral groove 52 on the other side of the shaft portion 5.

[0023] Furthermore, ribs 7 are provided on the front and back sides of the shaft portion 5 at the corners between the upper part of the outer circumferential surface of the shaft portion 5 and the lower surface of the lower plate 42 of the clamping portion 4, and the cord stopper 3 is set at a height h such that the lower end position of the peripheral wall 31 substantially coincides with the lower surface position of the shaft portion 5 when the upper end of the peripheral wall 31 abuts against the rib 7. This allows the cord stopper 3 to be easily attached to the shaft portion 5 at a position blocked by the peripheral wall 31 without the cord stopper 3 going too far upward when attached to the shaft portion 5 to expose the lower opening portion of the vertical groove 51 on one side of the shaft portion 5. Therefore, the hanging cord 13 does not come out of the lower opening portion of the vertical groove 51, and the hanging cord 13 can be held in a bent state facing downward.

[0024] The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. For example, the U-groove 34 provided as a marker on the upper end of the peripheral wall 31 of the cord stopper 3 may be omitted, or various markings such as paint, an arrow, the letters "up" or "down" or the like may be used to mark the up and down positions of the cord stopper 3 in place of the U-groove 34. Furthermore, the hanging cord 13 in the present invention is not limited to a specific one, including size, type, specifications, etc., and any cord can be used. [Explanation of symbols]

[0025] 1 Cord Adjuster 2 Controller body 3 Cord stopper 4 Clamping part 5 Shaft section 6 Rubber band (clasp) 7. Ribs 10 Lighting equipment 11 Ceiling hook body 12 Hook-on ceiling cap 13 Hanging cord 13a Loop section 14 Sockets 15 Lamp 16 Ring 17 Ceiling cover 18 Shade 31 Peripheral wall 32 Vertical slit 32a Slit end 33 Tapered section 34 U-groove (marker) 41 Side Panel 42 Lower plate 43 Hook claw 44 Notch 51 Vertical groove 52 Yokomizo 53 horizontal groove 54 Upper inclined groove 55 Downward slope groove 56 Convex

Claims

1. A cord adjuster for adjusting the length of a hanging cord of a lighting fixture extending downward from a hook-on ceiling cap, The device includes an adjuster body and a cord stopper that is attached to the adjuster body. The adjuster body is composed of a clamping part that is fitted into the hook-on sealing cap and a shaft part formed on the underside of the clamping part, the shaft portion has a vertical groove that opens on one side of the shaft portion, extends vertically, and allows a hanging cord to pass through, and a horizontal groove that opens vertically on the other side of the shaft portion, opens horizontally in a Y-shape on the front side of the shaft portion, and communicates with the vertical groove to bend the hanging cord that passes through the vertical groove into a loop so that the loop portion protrudes to the other side of the shaft portion; The cord stopper has a cylindrical peripheral wall, a vertical slit cut from an upper end to a lower end of the peripheral wall, and a tapered portion formed at the upper end of the peripheral wall and tapering downward, The cord stopper is fitted into the outer peripheral surface of the shaft with the vertical slit facing the other side of the shaft, so that the loop portion of the hanging cord protruding from the other side of the shaft protrudes from the vertical slit of the cord stopper, the lower opening of the vertical groove on one side of the shaft is blocked by the peripheral wall of the cord stopper, and the loop portion of the hanging cord protruding from the vertical slit is wrapped around the outer peripheral surface of the cord stopper.

2. 2. The cord adjuster of claim 1, The clamping portion has a pair of side plates that clamp the side surfaces of the hook-on sealing cap, and a hook claw protruding from the outer surface of each side plate, A retaining ring having rubber elasticity is attached to the loop portion of the hanging cord, The retaining ring is configured to be placed across the underside of the shaft portion and hooked onto a hook claw on one side plate and a hook claw on the other side plate to maintain the loop portion of the hanging cord in a wound state.

3. 3. The cord adjuster according to claim 1 or 2, The shaft portion is formed in a cylindrical shape, The cord stopper is formed in a cylindrical shape, A convex portion is provided on the other side surface of the lateral groove of the shaft portion to form an upper inclined groove and a lower inclined groove of the lateral groove, The convex portion protrudes beyond the other side surface of the shaft portion and is set to a protruding height at which it abuts against a slit end of a vertical slit of a cord stopper attached to the shaft portion.

4. The cord adjuster according to any one of claims 1 to 3, A rib is provided on the outer peripheral surface of the shaft portion or on the lower surface of the clamping portion, The cord stopper is set at a height such that a lower end of the peripheral wall is substantially aligned with a lower surface of the shaft portion when an upper end of the peripheral wall is in contact with the rib.

5. A method for adjusting the length of a hanging cord of a lighting fixture extending downward from a hanging ceiling cap by using a cord adjuster, comprising: The cord adjuster includes an adjuster body and a cord stopper attached to the adjuster body, The adjuster body is composed of a clamping part that is fitted into the hook-on sealing cap and a shaft part formed on the underside of the clamping part, The clamping portion has a pair of side plates that clamp the side surfaces of the hook-on sealing cap, and a hook claw protruding from the outer surface of each side plate, the shaft portion has a vertical groove that opens on one side of the shaft portion, extends vertically, and allows a hanging cord to pass through, and a horizontal groove that opens vertically on the other side of the shaft portion, opens horizontally in a Y-shape on the front side of the shaft portion, and communicates with the vertical groove to bend the hanging cord that passes through the vertical groove into a loop so that the loop portion protrudes to the other side of the shaft portion; The cord stopper has a cylindrical peripheral wall, a vertical slit cut from an upper end to a lower end of the peripheral wall, a tapered portion formed at the upper end of the peripheral wall and tapering downward, and a mark for indicating the upper and lower positions provided on the peripheral wall, Adjusting the length of the loop portion of the hanging cord to adjust the hanging cord extending to the lighting fixture to a desired hanging length; According to the mark, the cord stopper is fitted around the outer periphery of the shaft portion by guiding the tapered portion from the underside of the shaft portion and by facing the vertical slit toward the other side of the shaft portion, so that the loop portion of the hanging cord protruding from the other side of the shaft portion protrudes from the vertical slit of the cord stopper, and the lower opening of the vertical groove on one side of the shaft portion is closed by the peripheral wall of the cord stopper. The loop portion of the hanging cord protruding from the vertical slit is wound around the outer circumferential surface of the cord stopper fitted to the shaft portion, A method for adjusting the length of a hanging cord includes passing a rubber-elastic retaining ring attached to the loop portion of the hanging cord across the underside of the shaft and hooking it onto hook claws on one side plate of the adjuster body and hook claws on the other side plate to maintain the wound state of the loop portion of the hanging cord.

Images