JP6894286B2 - Lifting tape winding device - Google Patents

Description

The present invention relates to a blind lifting tape winding device.

As a conventional lifting tape winding device, there is one disclosed in Japanese Patent No. 5094245 (Patent Document 1). The elevating tape winding device disclosed in Patent Document 1 connects a drum composed of a main shaft having an arc-shaped outer peripheral surface forming a winding surface of the elevating tape and a pair of auxiliary shafts, and an upper end of the elevating tape. It is composed of a stop pin. That is, the loop portion at the upper end of the elevating tape is connected to the stop pin, the elevating tape connected to the stop pin is wound between the main shaft and the auxiliary shaft, and the elevating tape is connected to the auxiliary shaft and the main shaft via the auxiliary shaft. After passing through the space formed between them, the joints formed by looping the elevating tape are arranged so as to be wound around the main shaft so that they are located in the space between the auxiliary shaft and the main shaft. ..

In such an elevating tape winding device, the bag-shaped portion provided at the upper end of the elevating tape held by the stop pin between the auxiliary shafts is wound around the main shaft after drawing the space between the auxiliary shafts from one auxiliary shaft. To position the joint in space. Therefore, it can be prevented from being positioned on the winding surface of the shaft portion, and has the effect of preventing the solar radiation shielding material from rising due to the joint portion of the elevating tape.

Japanese Patent No. 5094245

However, in the conventional elevating tape winding device, since the elevating tape winding surface is formed by the surface connecting the main shaft having the arc-shaped outer peripheral surface and the outer circumference of the pair of auxiliary shafts, the main shaft portion has an arc-shaped elevating tape. However, in the portion from one end of the main shaft to the other end of the main shaft via the pair of auxiliary shafts, the elevating tape is wound in a distorted shape instead of an arc shape. As described above, since the elevating tape cannot be wound in a circular shape, there is a problem that the elevating tape cannot be wound evenly on the winding surface.

Therefore, the present invention has been made in view of such a problem, and an object of the present invention is to provide an elevating tape winding device capable of evenly winding on a winding surface while preventing deformation of the elevating tape. To provide.

In order to solve the above problems, according to the present invention, in the elevating tape winding device for winding and unwinding the elevating tape that enables the shielding material to be elevated and lowered, the elevating tape winding surface for winding the elevating tape in a substantially circular shape. The first winding surface component that constitutes the first winding surface that is a part of the above, and the second winding surface component that constitutes the second winding surface that is another part of the elevating tape winding surface. The elevating tape is provided between the first winding surface constituent portion and the second winding surface constituent portion, and is provided with a holding portion for holding an end portion of the elevating tape. A take-up device is provided.

According to such a configuration, since the holding portion is formed inside the circumferential surface formed by the first winding surface and the second winding surface, it interferes with the wound lifting tape when the lifting tape is wound. You can prevent it from happening. Further, since the two winding surfaces are formed on the same circumference, the elevating tape can be evenly wound on the elevating tape winding surface.

The present invention has various applications. The following application examples can be combined as appropriate.
For example, lateral slip prevention portions for preventing lateral displacement of the lifting tape wound on the lifting tape winding surface may be provided on both sides of the lifting tape winding surface. According to such a configuration, it is possible to prevent lateral displacement of the elevating tape and prevent malfunction of the blind.

Further, a locking tool to which the end portion of the elevating tape is detachably connected may be further provided, and one end portion of the locking tool may be held in the holding portion to restrict movement. According to such a configuration, the length of the elevating tape can be easily adjusted and fixed by adopting a structure in which the end portion of the elevating tape is held in the holding portion by using a locking tool.

Further, a locking tool to which the end portion of the elevating tape is detachably connected is further provided, and an insertion groove communicating with the holding portion is formed in the lateral slip prevention portion, and the locking tool is the insertion groove. It may be inserted into the holding portion along the line to restrict movement. According to such a configuration, by forming an insertion groove communicating with the holding portion in the lateral slip prevention portion, the elevating tape end portion can be guided to the holding portion, and the elevating tape end portion can be positioned by the insertion groove.

Further, the other end of the locking tool is located outside the lifting tape winding surface, and the locking tool has a shape so that the lifting tape wound on the lifting tape winding surface does not interfere with each other. Can be done. This shape can be, for example, a concave shape. According to this configuration, since the other end of the locking tool is located on the outside of the take-up surface, it is easy for hands and jigs to reach it, and the locking tool should be removed from the holding portion during maintenance such as replacement of the lifting tape. Becomes easier. Further, by making the other end of the locking tool concave, the locking tool does not interfere when the lifting tape is wound around the lifting tape winding surface.

According to the present invention, there is provided an elevating tape winding device capable of evenly winding on a winding surface while preventing deformation of the elevating tape. Other effects of the present invention will also be described in embodiments for carrying out the invention described below.

It is a front view for demonstrating the whole structure of the blind which concerns on 1st Embodiment. FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is a figure for demonstrating the elevating drum, (a) is the side view of the drum main body, and (b) is the figure which extracted the part of the elevating tape winding surface. It is an exploded perspective view of the elevating drum. It is a perspective view of the elevating drum. It is a figure for demonstrating the procedure of connecting the elevating tape to an elevating drum, (a) is a figure which shows the state just before inserting a locking tool into an insertion groove, and (b) is a figure which shows the state just before inserting a locking tool into an insertion groove It is a figure which shows the state which inserted into a groove. It is a figure for demonstrating the procedure of connecting the elevating tape to an elevating drum, and is the figure which shows the state which held the locking tool by the holding part. It is a figure for demonstrating the operation of winding the elevating tape around the elevating drum, (a) is a figure which shows the state which the elevating tape is not wound, and (b) shows the state which is winding the elevating tape. It is a figure. It is sectional drawing which shows the state which the elevating tape is wound around the elevating drum. It is a figure for demonstrating the elevating drum which concerns on 2nd Embodiment.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

(First Embodiment)
The first embodiment of the present invention will be described. First, the overall configuration of the blind 100 in which the elevating drum (elevating tape winding device) 200 of the present embodiment is used will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view for explaining the overall configuration of the blind 100 according to the embodiment, and FIG. 2 is a cross-sectional view taken along the line AA of FIG.

The blind 100 of the present embodiment supports the head box 110, the elevating tape 120 hanging from the head box 110, a plurality of slats (shielding materials) 130 elevating and descending by the elevating tape 120, and the plurality of slats 130 in an aligned state. It includes a ladder cord 140 and a bottom rail 150 provided below a plurality of rows of slats 130 and connected to the lower end of the elevating tape 120 and the lower end of the ladder cord 140. Hereinafter, the configuration of each part will be described in detail.

(Headbox 110)
The head box 110 is fixed to an opening such as a window frame or a ceiling via a bracket (not shown). As shown in FIG. 1, a rotation shaft 111 extending in the longitudinal direction of the head box 110 is rotatably supported in the head box 110. The head box 110 is provided with an elevating drum 200 and a rotating drum 112 at three locations in the longitudinal direction. The rotating shaft 111 penetrates each of the elevating drum 200 and the rotating drum 112, and rotates integrally with each of the elevating drum 200 and the rotating drum 112.

As will be described later, the elevating drum 200 is connected to the upper ends of the elevating tape 120 as shown in FIG. The elevating drum 200 winds and unwinds the elevating tape 120 to elevate and elevate the slat 130. Further, the upper end of the ladder cord 140 is connected to the rotating drum 112. The rotating drum 112 tilts the ladder cord 140 by winding and unwinding the upper end of the ladder cord 140 by rotating the rudder cord 140 by a predetermined angle, and rotates the slats 130.

Further, as shown in FIG. 2, the drum receiver 113 is fixed to the head box 110. The drum receiver 113 houses the elevating drum 200 and the rotating drum 112, and rotatably supports the rotating shaft 111. A plurality of insertion holes 113a through which the elevating tape 120 and the ladder cord 140 are inserted are formed at the bottom of the drum receiver 113, and a guide roller 114 for guiding the movement of the elevating tape 120 is provided in the insertion holes 113a. ..

Further, as shown in FIG. 1, the head box 110 includes a motor 115 that rotationally drives the rotating shaft 111, a control unit 116 that controls the driving of the motor 115, and a power supply unit 117 that supplies electric power to the motor 115. A power transformer 118 is provided.

(Elevating tape 120)
The elevating tape 120 raises and lowers the slat 130. As shown in FIG. 2, the elevating tape 120 has an upper end connected to an elevating drum 200, which will be described later, so that it can be wound and unwound. The lower end of the elevating tape 120 is guided by the guide roller 114, passes through the insertion hole 113a of the drum receiver 113, hangs down from the head box 110, inserts a plurality of slats 130, and is connected to the bottom rail 150.

(Slat 130)
The slat 130 is a shielding material that shields the space below the head box 110. As shown in FIG. 1, a plurality of slats 130 are arranged below the head box 110. As shown in FIG. 2, the plurality of slats 130 are supported in an aligned state by the ladder code 140, and rotate according to the tilt of the ladder code 140. Further, the elevating tape 120 is inserted through the plurality of slats 130, and the elevating tape 120 is moved up and down according to the elevating and lowering of the elevating tape 120.

(Ladder code 140)
The ladder code 140 supports a plurality of slats 130 in an aligned state. As described above, the upper end of the ladder cord 140 is connected to the rotating drum 112 so as to be able to wind and unwind a predetermined amount, and the lower end is connected to the bottom rail 150, which will be described later. The ladder cord 140 is tilted by being wound up and unwound by the rotating drum 112, and a plurality of slats 130 supported by the ladder cord 140 are rotated.

(Bottom rail 150)
The bottom rail 150 connects the elevating tape 120 and the lower end of the ladder cord 140. The bottom rail 150 is arranged at the lower end of the slat 130 as shown in FIG. The bottom rail 150 moves up and down according to the raising and lowering of the lifting tape 120, and raises and lowers the slat 130. Further, the bottom rail 150 rotates together with the slats 130 according to the tilt of the ladder cord 140.

The overall configuration of the blind 100 has been described above. Next, the details of the elevating drum 200, which is a characteristic component of the present embodiment, will be described with reference to FIGS. 3 to 5. 3A and 3B are views for explaining the elevating drum, FIG. 3A is a side view of the drum body, and FIG. 3B is a view showing a portion of the elevating tape winding surface. FIG. 4 is an exploded perspective view of the elevating drum. FIG. 5 is a perspective view of the elevating drum.

(Elevating drum 200)
The elevating drum 200 is an elevating tape winding device that enables the slat 130 to be elevated by winding the elevating tape 120. As shown in FIG. 3, the elevating drum 200 includes an elevating tape winding surface 210 that winds the elevating tape 120 in a substantially circular shape.

Further, as shown in FIGS. 4 and 5, the elevating drum 200 has disc portions on both sides of the elevating tape winding surface 210 to prevent lateral displacement of the elevating tape 120 wound on the elevating tape winding surface 210. Further includes (lateral slip prevention portion) 230 and 232, and a locking tool 240 to which the end portion of the elevating tape 120 is detachably connected. The elevating drum 200 includes a drum body DB having an elevating tape winding surface 210 and a disk portion 230, a drum piece DP connected to a winding drum body having a disk portion 232, and a locking tool 240. It is composed of two members. Hereinafter, the configuration of each part will be described.

(Elevating tape winding surface 210)
The elevating tape winding surface 210 is a portion for winding the elevating tape 120 in a substantially circular shape. As shown in FIG. 3A, the elevating tape winding surface 210 is a first winding surface constituent portion 212, which constitutes the first winding surface 212a, 214a, which is a part of the elevating tape winding surface 210. 214, the second winding surface component 216 constituting the second winding surface 216a which is another part of the elevating tape winding surface 210, the first winding surface component 212, 214 and the second winding. It is configured to include a holding portion 220 provided between the surface constituent portion 216 and holding the end portion of the elevating tape 120.

(First winding surface component 212, 214)
The first winding surface components 212 and 214 constitute the first winding surfaces 212a and 214a, which are a part of the elevating tape winding surface 210. As shown in FIG. 3B, the first winding surface constituents 212 and 214 are a pair of the first winding surface components 212 and 214 arranged symmetrically with respect to the horizontal line passing through the center of the elevating tape winding surface 210. The first winding surface constituents 212 and 214 have a fan shape, and the inner peripheral surface includes flat surfaces 212b and 214b and concave portions 212c and 214c. As shown in FIG. 4, fitting projections 212d and 214d that fit into the disc portion 232, which will be described later, project from two locations in the circumferential direction in the first winding surface constituent portions 212 and 214 in the axial direction. There is.

(2nd winding surface component 216)
The second winding surface component 216 constitutes the second winding surface 216a, which is another part of the elevating tape winding surface 210. As shown in FIG. 3B, the second winding surface component 216 is arranged between the first winding surface components 212 and 214 so as to be concentric with the elevating tape winding surface 210. .. The surface of the second winding surface component 216 facing the first winding surface components 212 and 214 is a flat surface portion 216b, and both ends thereof are the second winding surface 216a. As shown in FIG. 4, the second winding surface constituent portion 216 is formed with an engaging hole 216c that engages with the disc portion 232 described later at a symmetrical position with respect to the center.

(Holding part 220)
The holding portion 220 is a portion that holds the end portion of the elevating tape 120. As shown in FIG. 3A, the holding portion 220 is composed of a space between the first winding surface constituents 212 and 214 and the second winding surface constituents 216 facing each other. Therefore, the holding portion 220 includes a linear portion composed of the flat portions 212b and 214b of the first winding surface constituent portions 212 and 214 and the flat portion 216b of the second winding surface constituent portion 216, and the first winding. It is composed of an arc-shaped bulging portion composed of concave surface portions 212c and 214c of the surface constituent portions 212 and 214 and a flat surface portion 216b of the second winding surface constituent portion 216.

(Disk part 230, 232)
The disc portions 230 and 232 are lateral slip prevention portions for preventing lateral slippage of the lifting tape 120 wound on the lifting tape winding surface 210. The disc portions 230 and 232 are provided on both sides of the elevating tape winding surface 210 as shown in FIGS. 4 and 5. The disc portions 230 and 232 are concentric with the elevating tape winding surface 210 and have a larger diameter than the elevating tape winding surface 210. Preferably, the disc portions 230 and 232 have a diameter larger than the diameter of the elevating tape 120 whose entire length is wound around the elevating tape winding surface 210.

Further, as shown in FIG. 4, one disc portion 230 is integrally provided on one side portion of the elevating tape winding surface 210, and the other disc portion 232 has a drum piece DP as a drum main body DB. By being attached to, it is attached to the other side of the elevating tape winding surface 210. The drum piece DP is provided with four fitting holes 232a into which the fitting projections 212d and 214d of the first winding surface constituents 212 and 214 are fitted. Further, the other disk portion 232 is provided with an engaging projection 232b that engages with the engaging hole 216c of the second winding surface constituent portion 216 so as to project axially from the two target portions.

As shown in FIGS. 3A and 4, the disc portions 230 and 232 are formed with insertion grooves 230c and 232c that communicate with the holding portion 220 from the end portions. The width of the insertion grooves 230c and 232c is the same as the distance between the flat surfaces 212b and 214b of the first winding surface constituents 212 and 214 and the flat surfaces 216b of the second winding surface constituents 216. The ends 230d and 232d of the insertion groove pass through the concave portions 212c and 214c of the first winding surface constituent portion 212 and extend to the ends. The ends 230d and 232d of the insertion groove restrict the movement of the locking tool 240, which will be described later. By providing the two insertion grooves 230c and 232c in this way, even if the elevating drums 200 whose left and right arrangements are reversed are mixed in the same head box 110, the elevating tape 120 is provided in the insertion grooves 230c and 232c at the same position. Can be attached. Further, the insertion grooves 230c and 232c having different positions can be selectively determined according to the length of the elevating tape 120.

(Locking tool 240)
The locking tool 240 is such that the end portion of the elevating tape 120 is detachably connected. As shown in FIG. 5, the locking tool 240 is parallel to each other and connects the two long legs 241 and 242 parallel to each other and the two legs 241 at two points in the longitudinal direction. A hollow portion 245 formed between the two connecting portions 243 and 244, the two connecting portions 243 and 244, a recess 246 formed by the two leg portions 241 and 242, and the connecting portion 244, It is composed of hook portions 241a and 242a formed near the ends of the two leg portions 241 and 242.

The distance between the two legs 241 and 242 is almost the same as the distance between the insertion grooves 230c and 232c. Therefore, the locking tool 240 can be inserted into the holding portion 220 simply by sliding the two legs 241 and 242 along the insertion grooves 230c and 232c. Further, since the widths of the legs 241 and 242 are substantially the same as the depths of the insertion grooves 230c and 232c, the legs 241 and 242 protrude from the discs 230 and 232 and interfere with the winding of the elevating tape 120. There is no.

The length of the connecting portions 243 and 244 is approximately the same as or slightly wider than the width of the elevating tape 120. The elevating tape 120 is connected to the locking tool 240 by being wound while passing between the two connecting portions 243 and 244 and the hollow portion 245. The recess 246 has substantially the same width as the elevating tape winding surface 210, and can accommodate the elevating tape 120 inside.

When the locking tool 240 is held in the holding portion 220, the connecting portions 243 and 244, which are one ends of the locking tool 240, are held in the holding portion 220, but the two leg portions 241 and 242 The other end and a part of the recess 246 are located outside the elevating tape winding surface 210. At this time, even if the elevating tape 120 is wound around the elevating tape winding surface 210, the elevating tape 120 wound around the elevating tape winding surface 210 by the recess 246 does not interfere with the locking tool 240. Further, in a state where the elevating tape 120 is not wound on the elevating tape winding surface 210, it is pulled out by the legs 241 and 242 located outside the elevating tape winding surface 210, or the tips of the legs 241 and 242 are pulled out. The locking tool 240 can be easily pulled out from the holding portion 220 by hooking a finger on the hook portions 241a and 242a formed in the vicinity and pulling out.

The configuration of the elevating drum 200 has been described above. Next, the procedure for connecting the elevating tape 120 to the elevating drum 200 will be described with reference to FIGS. 6 and 7. FIG. 6 is a diagram for explaining a procedure for connecting the elevating tape 120 to the elevating drum 200, and FIG. 6A is a diagram showing a state immediately before inserting the locking tool 240 into the insertion grooves 230c and 232c. , (B) is a diagram showing a state in which the locking tool 240 is inserted into the insertion grooves 230c and 232c. FIG. 7 is also a diagram for explaining a procedure for connecting the elevating tape 120 to the elevating drum 200, and is a diagram showing a state in which the locking tool 240 is held by the holding portion. Note that FIGS. 6 and 7 show only the configuration of one disk portion 230 side, but the same applies to the other disk portion 232 side.

First, as shown in FIG. 6A, one end of the elevating tape 120 is passed through the holding portion 220 from the insertion groove 230c side to form the first winding surface constituent portion 212 and the second winding surface constituent portion 216. It is derived from the space on the second winding surface 216a. On the other hand, the other end of the elevating tape 120 is connected to the locking tool 240 and inserted into the insertion groove 230c as shown by the arrow A.

Next, as shown by the arrow B in FIG. 6B, the locking tool 240 is moved along the insertion groove 230c toward the holding portion 220.

Then, as shown in FIG. 7, the locking tool 240 is moved into the holding portion 220 until the tip of the locking tool 240 abuts on the end portion 230d of the insertion groove. Therefore, the movement of the locking tool 240 is restricted, and the locking tool 240 is held by the holding portion 220. Since the locking tool 240 is pressed against the end portion 230d of the insertion groove by the tension of the elevating tape 120, the locking tool 240 does not accidentally come out of the holding portion 220. Further, even if the elevating tape 120 wound around the locking tool 240 and connected to the locking tool 240 becomes thicker, it is inserted into the concave surface portion 212c side of the first winding surface constituent portion 212 and absorbed.

If the locking tool 240 is to be taken out from the holding portion 220, the elevating tape 120 may be pulled out by the leg portion 241 located on the outside of the elevating tape winding surface 210 in a state where the elevating tape 120 is not wound on the elevating tape winding surface 210. Alternatively, a finger is hooked on the hook portion 241a formed near the tip of each leg portion 241 and pulled out. As a result, the locking tool 240 can be easily pulled out from the holding portion 220.

The procedure for connecting the elevating tape 120 to the elevating drum 200 has been described above. Next, the operation of the elevating drum 200 will be described with reference to FIGS. 8 and 9. 8A and 8B are views for explaining the operation of winding the elevating tape around the elevating drum, FIG. 8A is a diagram showing a state in which the elevating tape is not wound, and FIG. 8B is a diagram showing a state in which the elevating tape is not wound. It is a figure which shows the state which is. FIG. 9 is a cross-sectional view showing a state in which the elevating tape is wound around the elevating drum.

When the elevating tape 120 is not wound on the elevating drum 200, as shown in FIG. 8A, the elevating tape 120 is not wound on the elevating tape winding surface 210, and the elevating tape 120 is not wound on the holding portion 220. The held locking tool 240 is visible from the outside.

Next, when the elevating tape 120 is wound around the elevating drum 200, the elevating tape 120 is wound around the elevating tape winding surface 210 as shown in FIG. 8 (b). As shown in FIG. 9, the connecting portions 243 and 244 of the locking tool 240 to which the end portions of the elevating tape 120 are connected are housed in the holding portion 220 and are located outside the elevating tape winding surface 210. Since the leg portion 241 is housed in the insertion groove 230c, the elevating tape 120 passes through the recess 246 of the locking tool 240. Therefore, the locking tool 240 does not interfere with the winding of the elevating tape 120, and the elevating tape 120 is evenly wound on the elevating tape winding surface 210.

(Effect of the first embodiment)
As described above, according to the present embodiment, since the holding portion 220 is formed inside the circumferential surface formed by the first winding surfaces 212a and 214a and the second winding surface 216a, the elevating tape At the time of winding, the elevating tape 120 does not interfere with the wound elevating tape 120, and the elevating tape 120 can be prevented from being deformed. Further, since the two winding surfaces 212a, 214a, and 216a are formed on the same circumference, the elevating tape 120 can be evenly wound on the elevating tape winding surface 210.

Further, by providing the disc portions 230 and 232 on both sides of the elevating tape winding surface 210, it is possible to prevent the elevating tape 120 from laterally shifting and prevent the blind from malfunctioning.

Further, by adopting a structure in which the end portion of the elevating tape 120 is connected to the elevating drum by using the locking tool 240, the length of the elevating tape 120 can be easily adjusted and fixed.

Further, by forming the insertion grooves 230c and 232c communicating with the holding portion 220 in the disc portions 230 and 232, the end portion of the elevating tape 120 can be guided to the holding portion 220 by the insertion grooves 230c and 232c. The end portion of the elevating tape 120 can be positioned.

Further, since the other end of the locking tool 240 is located outside the lifting tape winding surface 210, it becomes easier for hands and jigs to reach the locking tool 240, and the locking tool is used during maintenance such as replacement of the lifting tape 120. The 240 can be easily removed from the holding portion 220. Further, by making the other end of the locking tool 240 concave, the locking tool 240 does not interfere when the lifting tape 120 is wound around the lifting tape winding surface 210.

(Second embodiment)
A second embodiment of the present invention will be described with reference to FIG. In the elevating drum 300 of the present embodiment, the shapes of the first winding surface constituents 312 and 314 and the holding portion 320 constituting the elevating tape winding surface 310 are the first winding surface constituents 212 of the first embodiment. It is different from the shapes of 214 and the holding portion 220. Since other points are the same as those in the first embodiment, duplicate description will be omitted.

(First winding surface component 312, 314)
The first winding surface constituents 312 and 314 are the first winding surfaces 312a and 314a which are a part of the elevating tape winding surface 310 like the first winding surface constituents 312 and 314 of the first embodiment. It constitutes. The first winding surface constituents 312 and 314 are different from the first wound surface constituents 212 and 214 of the first embodiment, and as shown in FIG. 10, the inner peripheral surface is only the flat portions 312b and 314b. It is composed of. Further, the inside of the first winding surface constituent parts 312 and 314 is formed to be hollow in order to prevent sink marks.

The insertion groove 330c formed in the disk portion 330 is different from the insertion groove 230c of the first embodiment, and as shown in FIG. 10, the flat portions 312b and 314b of the first winding surface constituent portions 312 and 314 The distance is the same as the distance between the plane portion 316b and the plane portion 316b of the second winding surface constituent portion 316, and is formed along these intervals.

(Holding unit 320)
Unlike the holding portion 220 of the first embodiment, the holding portion 320 is different from the holding portion 220 of the first embodiment, as shown in FIG. It is composed of a linear portion composed of the plane portion 316b of the 316. Therefore, the holding portion 320 has a shape along the insertion groove 330c.

The configuration different from the first embodiment of the present embodiment has been described above. In the present embodiment, the method of causing the holding portion 320 to hold the end portion of the elevating tape 120 is the same as that of the first embodiment. However, since the shape of the holding portion 320 is different from that of the holding portion 220 of the first embodiment, as shown in FIG. 10, the locking tool 240 to which the end portions of the elevating tape 120 are connected is the insertion groove 330c. It is held by the holding portion 320 having the same width as. Therefore, the upper surface of the elevating tape 120 connected to the locking tool 240 is held in contact with the flat surface portions 312b and 314b of the first winding surface constituent portions 312 and 314.

(Effect of the second embodiment)
As described above, according to the present embodiment, since the inner peripheral surfaces of the first winding surface constituent portions 312 and 314 are flat portions 312b and 314b, the holding portion 320 is linear along the insertion groove 330c. The shape is, and there is no unevenness. Therefore, when the locking tool 240 is inserted into the holding portion 320 or taken out from the holding portion 320, the locking tool 240 does not get caught in the holding portion 320.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

For example, in the above embodiment, disc portions (lateral slip prevention portions) 230 and 232 for preventing lateral displacement of the lifting tape 120 wound on the lifting tape winding surface 210 are provided on both sides of the lifting tape winding surface 210. However, the present invention is not limited to this example. The lateral slip prevention portion does not necessarily have to be provided, and may be provided only on one side of the elevating tape winding surface 210.

Further, in the above embodiment, the lateral slip prevention portion is set to the disc portion 230 and 232, but the present invention is not limited to this example. The lateral slip prevention portion does not necessarily have to be shaped like a disk portion. For example, the shape may be such that one or a plurality of rod-shaped or plate-shaped members radially protrude from both sides or one side of the elevating tape winding surface 210.

Further, in the above embodiment, the shape of the holding portion is made to include the concave surface portion or only the linear portion, but the present invention is not limited to this example, and the holding portion has an arbitrary shape. You may.

Further, in the above embodiment, the locking tool 240 in which the end portion of the elevating tape 120 is detachably connected is further provided, and one end portion of the locking tool 240 is held in the holding portion 220. The invention is not limited to this example. The end of the lifting tape does not necessarily have to be detachably connected to the locking tool. For example, the end portion of the elevating tape may be fixed to the locking tool, or the end portion of the elevating tape itself may be processed so as to be held in the holding portion.

Further, in the above embodiment, the disc portions 230 and 232 are formed with insertion grooves 230c and 232c communicating with the holding portion 220, and the locking tool 240 is provided in the holding portion 220 along the insertion grooves 230c and 232c. Although the configuration is such that the movement is restricted by being inserted, the present invention is not limited to this example. It is not always necessary to form an insertion groove in the disk portion. For example, the locking tool may be elastically deformed, and the locking tool may be elastically deformed and inserted into the holding portion to be held. Further, the holding portion is held, for example, by increasing the radial opening of the winding surface on the side where the locking tool 240 is inserted and reducing the radial opening of the winding surface on the side from which the elevating tape is led out. By forming the shape in which the radial size of the portion is changed, the end portion of the elevating tape may be held.

Further, in the above embodiment, the other end of the locking tool 240 is located outside the elevating tape winding surface 210, and the elevating tape 120 wound on the elevating tape winding surface 210 interferes with the locking tool 240. However, the present invention is not limited to this example. Lifting tape The shape does not necessarily have to be concave as long as the lifting tape wound on the winding surface does not interfere with each other.

The above-described embodiment, application example, and modification can be implemented in any combination.

100 Blind 110 Headbox 111 Rotating shaft 112 Rotating drum 113 Drum receiver 113a Insertion hole 114 Guide roller 115 Motor 116 Control unit 117 Power supply unit 118 Power transformer 120 Lifting tape 130 Slat (shielding material)
140 Ladder code 150 Bottom rail 200 Lifting drum 210, 310 Lifting tape Winding surface 212, 214, 312, 314 First winding surface component 212a, 214a First winding surface 212b, 214b, 312b, 314b Flat surface 212c, 214c Concave surface 212d, 214d Fitting protrusion 216, 316 Second winding surface component 216a Second winding surface 216b, 316b Flat surface 216c Engagement hole 220, 320 Holding part 230, 232, 330 Disk part (prevention of lateral slippage) Department)
232a Fitting hole 232b Engagement protrusion 230c, 232c, 330c Insertion groove 230d, 232d Insertion groove end 240 Locking tool 241, 242 Leg part 243, 244 Connecting part 245 Hollow part 246 Recessed DB Drum body DP Drum piece

Claims (6)

In the lifting tape winding device that winds and unwinds the lifting tape that enables the shielding material to be lifted and lowered.
The first winding surface component that constitutes the first winding surface, which is a part of the lifting tape winding surface that winds the lifting tape in a substantially circular shape,
The second winding surface component that constitutes the second winding surface, which is another part of the elevating tape winding surface,
A holding portion formed by a space between the first winding surface constituent portion and the facing surface of the second winding surface constituent portion and holding the end portion of the elevating tape on the facing surface, and a holding portion.
An elevating tape winding device characterized by being equipped with. The first winding surface component is a pair of ones arranged symmetrically with respect to a horizontal line passing through the center of the elevating tape winding surface, and constitutes the first winding surface having an arc-shaped outer circumference. ,
The second winding surface component is arranged between the first winding surface components so as to be concentric with the elevating tape winding surface, and both ends form the second winding surface having an arc shape. And
The elevating tape winding device according to claim 1, wherein the elevating tape winding surface is formed by the first winding surface and the second winding surface. The first or second aspect of the present invention, wherein lateral slip prevention portions for preventing lateral slippage of the lifting tape wound on the lifting tape winding surface are provided on both sides of the lifting tape winding surface. Lifting tape winding device. Further provided with a locking tool to which the end of the elevating tape is detachably connected.
An insertion groove communicating with the holding portion is formed in the lateral slip prevention portion.
The elevating tape winding device according to claim 3 , wherein the locking tool is inserted into the holding portion along the insertion groove to restrict movement. Further provided with a locking tool to which the end of the elevating tape is detachably connected.
The lifting tape winding device according to any one of claims 1 to 3, wherein one end of the locking tool is held in the holding portion to restrict movement. The other end of the locking tool is located on the outside of the elevating tape winding surface.
The elevating tape winding device according to claim 4 , wherein the locking tool has a shape in which the elevating tape wound on the elevating tape winding surface does not interfere with each other.

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