Electric shutter

Abstract

To reduce the occurrence of jerking during the feeding and unwinding of a slat.SOLUTION: In an electric shutter, opening / closing force in an opening direction of a slat and / or opening / closing force in a closing direction of the slat is increased so that jerking does not occur compared to the opening / closing force when there is no pressing member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an electric shutter. [Background technology]

[0002] Electric shutters are known in which slats are extended and retracted by the driving force of a motor. Summary of the Invention [Problem to be solved by the invention]

[0003] When the slats of an electric shutter are extended or retracted, the slats may stop and move repeatedly, causing a so-called jerking phenomenon. This jerking is said to be caused by play in the motor's rotating shaft and the balance between the slat and the spring, but the jerking can look unsightly when the slat is extended or reeled in, and can also be noisy. For this reason, there is a demand for an electric shutter that can reduce the occurrence of jerking when the slats are extended or retracted. [Means for solving the problem]

[0004] In order to solve the above-mentioned problems, the electric shutter according to claim 1 comprises a slat, a guide rail, and a pressing member, and the slat is biased in the winding direction by a spring attached to a winding shaft driven by a motor, When moving the slats in the closing or opening direction, an opening or closing force is required to counter the difference between the spring force and the weight of the slats. The guide rails guide both ends of the slats. The pressing members have a front pressing member that contacts the front surface of the slat and a rear pressing member that contacts the rear surface of the slat, and are attached to the guide rail to press and clamp the slat. By pressing, the opening and closing force in the opening direction and / or the closing force in the closing direction of the slat is increased compared to the opening and closing force when there is no pressing member. 3-12kg I increased it. [Effects of the Invention]

[0005] With the above-described configuration, the present invention can provide an electric shutter that can smoothly extend and rewind slats regardless of the performance of the motor. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a vertical cross-sectional view of an electric shutter according to a first embodiment of the present invention. [Figure 2] Same, cross section. [Figure 3] 1, and FIG. 2(b) is an enlarged view of the main part of FIG. [Figure 4] 3(b) is an enlarged view of the main part of the first modified example in which the front mohair and the back mohair are used. FIG. [Figure 5] 10(c) is an enlarged view of the main part when the front mohair and back mohair of Modification Example 2 are used, and FIG. 10(d) is an enlarged view of the main part when the front mohair and back mohair of Modification Example 3 are used. [Figure 6] 10 is a table illustrating the effect of reducing jerking. [Figure 7] 5A and 5B show an electric shutter according to a second embodiment of the present invention, where FIG. 5A is a longitudinal cross-sectional view of a main portion, and FIG. 5B is a transverse cross-sectional view of a main portion. DETAILED DESCRIPTION OF THE INVENTION

[0007] [Inventor's discovery] The jerking motion occurs due to the backlash of the motor and the balance between the slat and the spring, so the up and down jerking motion occurs on the winding shaft where the motor and spring are located. The jerking motion that occurs on the winding shaft is transmitted to the slats, and when it reaches the tip of the shutter seat plate during operation and causes the seat plate to move up and down, it is recognized as a jerking phenomenon. The solution this time is to increase the resistance so that the up and down movement that occurs does not reach the tip, making it difficult to detect the jerk. One function of the pressing member is to suppress noise when the opening and closing body is opened and closed. Conventionally, pressing members have been attached so that they only need to abut against the slats so as not to cause direct contact between the guide rail and the slats, and have not been brought into contact with the slats so strongly as to affect the opening and closing resistance. The inventors have discovered that jerking can be reduced by bringing a pressing member into contact with the slats of the opening / closing body to provide a certain degree of resistance to the opening and closing of the opening / closing body. They also discovered that if the resistance to the opening and closing body is too great, it will hinder the opening and closing of the opening and closing body, and if the resistance is too small, it will not be possible to reduce the occurrence of jerking. Therefore, in order to reduce the occurrence of jerking, the inventors have designed the pressing member as follows and incorporated it into the electric shutter.

[0008] Hereinafter, an electric shutter according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the same reference numerals in different drawings indicate parts with the same functions, and duplicated descriptions in each drawing will be omitted as appropriate.

[0009] (First embodiment) [Electric shutter configuration] As shown in Figures 1 and 2, the electric shutter 1 has guide rails 2 attached to the left and right sides of the front of a frame body b attached around the opening of a main body a, running vertically, and the left and right ends of an opening / closing body 4, which is made up of multiple slats 3 connected vertically, are engaged in guide recesses 20 of the guide rails 2, and the opening / closing body 4 is guided by the guide recesses 20 and moves up and down by motor drive. A front pressing member 8 and a rear pressing member 9 are provided on the front and rear inner surfaces of the guide recess 20 as pressing members for providing resistance to the up and down movement of the opening / closing body 4. By abutting and pressing against the slats of the opening / closing body 4, resistance is provided to the up and down movement of the opening / closing body 4, thereby suppressing the occurrence of the jerking phenomenon.

[0010] The upper end of the top slat 3 in the opening / closing body 4 is attached to a winding shaft 5 provided on the upper end side of the guide rail 2, and as the winding shaft 5, driven by a motor 6, rotates, the opening / closing body 4 is wound up onto the winding shaft 5 to open it, and the opening / closing body 4 is unwound from the winding shaft 5 to close it. The opening / closing body 4 is biased in the winding direction by a spring 7 attached to the winding shaft 5, and when unwinding, the biasing force of the spring 7 allows it to descend in balance with the opening / closing body 4.

[0011] The winding shaft 5, motor 6, and spring 7 are coaxially connected, and the winding shaft 5, motor 6, and spring 7 are covered by a shutter box c, so that the opening / closing body 4 is unwound from an opening c1 of the shutter box c.

[0012] [Configuration of front pressing member and rear pressing member] The front pressing member 8 and the rear pressing member 9 in the first embodiment are mohair made by bundling a large number of fibers 91, and in the following description, the front pressing member 8 will be referred to as front mohair 8 and the rear pressing member 9 as rear mohair 9. As shown in Figures 1 to 3, the front mohair 8 is supported by front support recesses 20a formed in front of the guide recesses 20 in the left and right guide rails 2, and the rear mohair 9 is supported by rear support recesses 20b formed in rear of the guide recesses 20 in the left and right guide rails 2. Here, the front support recess 20a and the rear support recess 20b are formed parallel to the longitudinal direction (vertical direction) of the guide recess 20 and over the entire area, as shown in FIGS. A base 90 (to be described later) is engaged and fixed to the front support recess 20a and the rear support recess 20b, with fibers 91 (to be described later) of the front mohair 8 and the rear mohair 9 facing the opening / closing body 4. The front mohair 8 and the rear mohair 9 are arranged over the entire vertical length of the front support recess 20a and the rear support recess 20b, respectively. The front mohair 8 and rear mohair 9 supported in this manner have fibers 91 abutting the front surface 30 and rear surface 31 of the slat 3 in the opening / closing body 4, respectively, and this abutment causes the front surface 30 and rear surface 31 to be sandwiched and pressed between the front mohair 8 and rear mohair 9. That is, by pinching and pressing the front surface 30 and the rear surface 31 of the slat 3 in the opening and closing body 4, the opening and closing force of the opening and closing body 4 is reduced compared to when there is no mohair. Make it hard to recognize By this time, the opening and closing force of the opening and closing body 4 in the opening direction and / or the opening and closing force in the closing direction can be increased.

[0013] The front mohair 8 and the back mohair 9 have the same structure and are all made of the same fiber material 91 . The front mohair 8 and the back mohair 9 in this embodiment include the above-mentioned base 90 and a large number of the above-mentioned fibers 91 planted in the base 90, as shown in FIG. 4(a). The fibers 91 are made of flexible synthetic resin (for example, polypropylene), and are planted so as to present a substantially fan-like shape when viewed from above. In addition, the front mohair 8 and the rear mohair 9 are arranged so that the fibers 91 abut against the slat 3 at a predetermined lap distance, thereby sandwiching and pressing the front surface 30 and rear surface 31 of the slat 3 in the opening / closing body 4. Here, the lap length is the length of the portion where the fibers 91 of the front mohair 8 and the rear mohair 9 overlap with the slat 3 of the opening / closing body 4.

[0014] The front mohair 8 and the back mohair 9 shown in FIG. 4(b) of the first modified example have a large number of fibers 91 planted in the base 90 except for the center portion, and are planted so as to form a substantially fan shape when viewed from above. As in Figure 4(a), the front mohair 8 and the rear mohair 9 are arranged so that the fibers 91 abut against the slat 3 at a predetermined lap distance, thereby sandwiching and pressing the front surface 30 and rear surface 31 of the slat 3 in the opening / closing body 4.

[0015] The front mohair 8 and the back mohair 9 shown in FIG. 5(c) of the second modification include a base 90, a large number of fibers 91 planted in the base 90, and a film material 92 in the center of the base 90. The fibers 91 are planted so as to have a substantially fan shape when viewed from above. As in Figure 4(a), the front mohair 8 and the rear mohair 9 are arranged so that the fibers 91 abut against the slat 3 at a predetermined lap distance, thereby sandwiching and pressing the front surface 30 and rear surface 31 of the slat 3 in the opening / closing body 4. The film material 92 is made by folding a plurality of sheets made of flexible synthetic resin (for example, polypropylene) one on top of the other, and is adjusted to be shorter than the fibers 91. The length of the film material 92 is not limited to being shorter than the fiber 91, and may be the same length as the fiber 91 or longer than the fiber 91. The film material 92 reduces damage caused by bending of the fibers 91 that come into contact with the slats 3 of the opening / closing body 4, and by coming into contact with the slats 3 of the opening / closing body 4, improves the airtightness within the guide rail 2.

[0016] The front mohair 8 and rear mohair 9 shown in Figure 5(d) of variant example 3 have all fibers 91 parallel to the front-to-back direction, and a film material 92 of the same length as the front mohair 8 and rear mohair 9 is planted in the center of the base 90. As in Figure 4(a), the front mohair 8 and the rear mohair 9 are arranged so that the fibers 91 abut against the slat 3 at a predetermined lap distance, thereby sandwiching and pressing the front surface 30 and rear surface 31 of the slat 3 in the opening / closing body 4.

[0017] Next, referring to FIG. 6, the shakiness of the electric shutter 1 using the front mohair 8 and the rear mohair 9 of this embodiment and modifications 1 to 3 will be described. reduction Consider the effects.

[0018] Jerk reduction The effectiveness was demonstrated using the conventional product, the present embodiment (a), variant 1 (b), variant 2 (c), and variant 3 (d) described above for the front mohair 8 and rear mohair 9, as shown in Figure 6. As a comparison product, the opening and closing force and jerking reduction effect of an electric shutter without mohair were measured as shown in Figure 6, and the difference in opening and closing force between this and conventional electric shutters with mohair (a) to (d) and the jerking reduction effect were verified. In the figure, (a-1) is similar to the front mohair 8 and back mohair 9 in (a), in which flexible fibers are planted to form an approximately fan shape, but the number of fibers is reduced compared to (a), resulting in a lower mohair density.

[0019] From the results shown in Figure 6, when the conventional front mohair 8 and rear mohair 9 were configured with a clearance (total of 0.5 mm) between them and the slats of the opening and closing body, the difference in opening and closing force was 0.9 kg in the opening and closing directions. In the conventional configuration, Recognizable Jerking occurs, reduction It was found to be ineffective.

[0020] [Configuration of (a)] When the front mohair 8 and rear mohair 9 were configured with a fiber count of 2,300 fibers / cm, a mohair length of 5.3 mm, a front mohair 8 lap length of 1.4 mm, and a rear mohair 9 lap length of 1.3 mm (total lap length of 2.7 mm), the difference in opening and closing force was 3.6 kg in the opening and closing directions. And the configuration of (a) is a jerk when opening and closing. reduction A high level of effectiveness was observed.

[0021] [Configuration of (a-1)] When the front mohair 8 and rear mohair 9 were configured with the same mohair length, overlap between the front mohair 8 and rear mohair 9, and total overlap as in (a), and with a fiber count of 1600 fibers / cm, the difference in opening and closing force was 1.8 kg in the opening direction and 2.3 kg in the closing direction. And the configuration of (a-1) is a jerk when opening and closing. reduction The effectiveness was confirmed.

[0022] [Configuration of (b)] When the front mohair 8 and rear mohair 9 were configured with the same mohair length, lap length of the front mohair 8 and rear mohair 9, and total lap length as in (a), and fibers 91 were implanted except for the center part of the base 90, resulting in a fiber count of 1600 fibers / cm, the difference in opening and closing force was 2.2 kg in the opening direction and 2.8 kg in the closing direction. And the configuration of (b) is a jerk when opening and closing. reduction The effectiveness was confirmed.

[0023] [Configuration of (c)] When the front mohair 8 and rear mohair 9 were configured with the same mohair length, lap length of the front mohair 8 and rear mohair 9, and total lap length as in (a), and the film material length was 3.7 mm and the number of fibers was 1600 / cm, the difference in opening and closing force was 3.8 kg in the opening direction and 3.9 kg in the closing direction. And the configuration of (c) is a jerk when opening and closing. reduction A high level of effectiveness was observed.

[0024] Although not shown in Figure 6, even if the total wrap is 2.5 mm, reduction The effect is recognized, and a difference of about 0.2 mm is enough to make a jerk. reduction It was found that there was no effect. Furthermore, in the configurations (a) to (c), the opening and closing movement of the opening and closing body 4 was smooth, and it was recognized that there was no influence of pressure from the front mohair 8 and the rear mohair 9.

[0025] [Configuration of (d)] When the front mohair 8 and rear mohair 9 were configured with a fiber count of 1600 / cm, a mohair length of 7.2 mm, a film material length of 7.2 mm, a front mohair 8 lap length of 3.3 mm, and a rear mohair 9 lap length of 3.2 mm (total lap length 6.5 mm), the difference in opening and closing force was 10.6 kg in the opening direction and 7.3 kg in the closing direction. And the configuration of (d) is a jerk when opening and closing. reduction A very high effect was observed. In the configuration of (d), the opening and closing movement of the opening and closing body 4 was found to be smooth, and there was no influence of pressure from the front mohair 8 and the rear mohair 9.

[0026] From the results of FIG. 6, when the front mohair 8 and rear mohair 9 of (a) to (d) are configured as shown in FIG. 6, the difference in opening and closing force can be increased in the range of 1.8 kg to 10.6 kg in the opening direction and 2.3 kg to 7.3 kg in the closing direction. reduction It was found to be effective. Although not shown in Figure 6, the opening and closing force of the opening and closing body 4 can be increased by 3 kg to 12 kg compared to the configuration without mohair. Recognizable It was found that there was no jerking and it could be opened and closed smoothly. It was also found that if the opening and closing force is less than 1.0 kg, the occurrence of jerking cannot be reduced, and if it exceeds 12 kg, the opening and closing movement of the opening and closing body does not proceed smoothly.

[0027] That is, the front mohair 8 and rear mohair 9 shown in Figures 4(a)(b) and 5(c)(d) increase the opening and closing force and prevent the jerking of the opening and closing body 4 by combining the following conditions (1) to (3) or (1) to (4). reduction It is possible. The front mohair 8 and the back mohair 9 (1) The total overlap length of the fibers 91 of the front mohair 8 and the back mohair 9 is set to 2.5 mm to 6.5 mm. (2) The length of the fibers 91 of at least one of the front mohair 8 and the back mohair 9 is set to 5 mm or more. (3) The density of the fibers 91 of at least one of the front mohair 8 and the back mohair 9 is set to 1600 fibers / cm to 2300 fibers / cm. (4) A film material 92 is provided in at least one of the front mohair 8 and the rear mohair 9.

[0028] Although not shown in FIG. 6, the front mohair 8 and rear mohair 9 shown in FIGS. 4(a)(b) and 5(c)(d) increase the opening and closing force and prevent the opening and closing body 4 from jerking under any one or at least two of the above-mentioned conditions (1) to (4). reduction I realized it was possible.

[0029] Therefore, by using any one of the above conditions (1) to (4) or a combination of at least two or more of them, regardless of the performance of the motor 6, the slat 3 in the opening / closing body 4 can be extended and retracted with a jerking motion. Unrecognizable It is possible to provide an electric shutter 1 that can be operated smoothly.

[0030] The overlap length of the fiber 91 (1) in the front mohair 8 and back mohair 9 shown in Figures 4(a)(b) and 5(c)(d) may be 2.5mm to 6.5mm or more in total for the front mohair 8 and back mohair 9, and the front mohair 8 and back mohair 9 may have the same overlap length or different overlap lengths. In addition, the length of the fiber 91 in (3) is sufficient if the fiber 91 of either the front mohair 8 or the rear mohair 9 is 5 mm or more, but if the other fiber 91 is less than 5 mm, it should be long enough to always be in contact with at least the slat 3 of the opening / closing body 4. Furthermore, the difference in length between the fibers 91 and the film material 92 may be any difference that allows the film material 92 to abut against the slats 3 of the opening / closing body 4, regardless of the lengths of the fibers 91 and the film material 92.

[0031] Next, an electric shutter 10 according to a second embodiment of the present invention will be described with reference to FIG. The electric shutter 10 of this embodiment is provided with an airtight material 9a as a rear pressing member in place of the rear mohair 9 of the first embodiment. The airtight material 9a is formed into a predetermined shape using a synthetic resin material that is flexible and has the elasticity to return to its original shape after deformation, and is engaged and supported in the rear support recess 20b in a configuration similar to that of the rear mohair 9 in the first embodiment. The airtight material 9a abuts against the rear surface 31 of the slat 3 of the opening / closing body 4, and this abutment sandwiches and presses the slat between the front mohair 8 abutting against the front surface 30 and the airtight material 9a abutting against the rear surface 31. That is, by sandwiching and pressing the slat 3 in the opening and closing body 4 between the front mohair 8 and the airtight material 9a from the front and rear, the opening and closing force of the opening and closing body 4 is reduced compared to when there is no mohair. 、The opening and closing force of the opening and closing body 4 in the opening direction and / or the opening and closing force in the closing direction can be increased by 3 kg to 12 kg. As a result, the jerking motion of the opening / closing body 4 as shown in FIG. reduction Furthermore, the airtightness inside the guide rail 2 can be improved by the airtight material 9a coming into contact with the slats 3 of the opening / closing body 4.

[0032] The electric shutters 1 and 10 according to the embodiments of the present invention have been described in detail above with reference to the drawings, but the specific configurations are not limited to these embodiments, and the present invention also includes design changes that do not deviate from the gist of the present invention.

[0033] Furthermore, the above-described embodiments can be combined by utilizing the techniques of each other, as long as there are no particular contradictions or problems in the purpose, configuration, etc., of the embodiments. [Explanation of symbols]

[0034] 1: Electric shutter 10: Electric shutter 2: Guide rail 3: Slats 5: Winding shaft 6: Motor 7: Spring 8: Front mohair 9: Mohair back 9a: Airtight material 30:Front 31: Rear side 91: Fiber 92: Film material

Claims

[Claim 1] The device includes a slat, a guide rail, and a pressing member. The slats are biased in the winding direction by a spring attached to a winding shaft driven by a motor, and when moving the slats in the closing or opening direction, an opening or closing force is required to counter the difference between the force of the spring and the weight of the slats. The guide rails guide both ends of the slats. The pressing members include a front pressing member that contacts the front surface of the slat and a rear pressing member that contacts the rear surface of the slat, and are attached to the guide rail to press and clamp the slat. The pressure increases the opening and / or closing force of the slats in the opening and / or closing directions by 3 to 12 kg compared to the opening and closing force when there is no pressure member. Electric shutter.

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