JP2022074849A - Electric opening/closing mechanism for fittings - Google Patents

Abstract

To provide an electric opening/closing mechanism for fittings that does not easily cause misalignment of parts even when a power source is not connected or an external force is applied.SOLUTION: An electric opening/closing mechanism for fittings 1 includes a frame 10, a sliding screw mechanism 2 provided on a fitting 100 having shoji 50 arranged in the frame 10, opens and closes the shoji 50, and has a screw shaft body 21 arranged along the frame 10 and a nut body 23 screwed to the screw shaft body 21 and movable along the screw shaft body 21, an arm portion 3 connected to the sliding screw mechanism 2 and the shoji 50 to open and close the shoji 50, and a drive unit 4 that drives the sliding screw mechanism 2.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to an electric opening / closing mechanism for fittings.

Conventionally, an electric fitting having an electrically driven ball screw provided on the frame of the fitting and an opening / closing mechanism for opening / closing the shoji by connecting the ball screw and an arm portion for opening / closing the shoji has been proposed (for example). See Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-69879

Electric fittings often have a structure in which servo control for controlling the opening / closing mechanism is not generally performed in the event of a power failure or disconnection of a power source. Servo control is performed when the opening / closing mechanism is configured by combining mechanical element parts such as mesh gears, magnetic gears, etc., excluding gears with self-locking characteristics such as ball screws, mysterious planetary gears, and worm gears with a small lead angle. Machine element parts may be misaligned before they are broken. If a force is manually applied to the opening / closing mechanism when the power supply is not connected, the opening / closing mechanism may move unintentionally, and an error may occur in the recognition of the position information of the mechanical element parts when the power is turned on.

The present disclosure is an electric opening / closing mechanism for fittings provided on a frame body and a fitting having an obstacle arranged in the frame body to open / close the obstacle, and a screw shaft body arranged along the frame body and a screw shaft body. A sliding screw mechanism having a nut body that is screwed into the screw shaft body and can move along the screw shaft body, an arm portion that is connected to the sliding screw mechanism and the obstacle to open and close the obstacle, and the slide. The present invention relates to an electric opening / closing mechanism for fittings, which comprises a drive unit for driving a screw mechanism.

It is a figure which shows the open state of the electric fitting of this embodiment. It is a figure which shows the closed state of the electric fitting of this embodiment. It is a figure before attaching the lower frame cover of this embodiment to an opening / closing mechanism storage part. It is a figure which attached the lower frame cover of this embodiment to the opening / closing mechanism storage part. It is a cross-sectional view of the electric opening / closing mechanism for fittings of this embodiment. FIG. 4A is an enlarged view of a main part of FIG. 4A. It is a vertical sectional view of the electric opening / closing mechanism for fittings of this embodiment. It is an exploded perspective view of the damper part of this embodiment. It is an exploded perspective view of the grease cage of this embodiment. It is a perspective view which looked at the inner cage of this embodiment from the inside. It is a schematic diagram explaining the state which holds the lubricating oil of this embodiment. It is a block diagram of the control part of this embodiment.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The electric fitting 100 is, for example, as shown in FIGS. 1 and 2, a side sliding window provided at an opening of a building. The electric fitting 100 includes a frame body 10, a shoji screen 50, and an electric opening / closing mechanism 1 for fittings. The electric fitting 100 is configured such that a shoji 50 can be opened and closed inside the frame body 10.

The frame body 10 is a square frame connected to an upper frame 11, a lower frame 12, and a pair of vertical frames 13, 14. A shoji screen 50, which will be described later, is attached to the inside and the outside of the frame 10. In the present embodiment, the electric opening / closing mechanism 1 for fittings is arranged on the lower frame 12.

The lower frame 12 is formed in a substantially U shape with the upper portion open in a side view. The lower frame 12 has an opening / closing mechanism storage portion 120 and a lower frame cover 123 as a cover portion.

The opening / closing mechanism storage unit 120 is a recess formed on the upper surface of the lower frame 12 on the indoor side of the lower frame 12. As shown in FIGS. 3A to 4A, the opening / closing mechanism storage unit 120 has a bottom surface portion 121 and a side wall portion 122. The bottom surface portion 121 is a substantially rectangular surface of the lower frame 12 extending in a substantially horizontal direction. The side wall portion 122 has an indoor side side wall portion 122a, an outdoor side wall portion 122b, and a connecting hole 122c. The indoor side wall portion 122a stands up from the indoor side edge of the bottom surface portion 121, is divided into one and the other in the longitudinal direction of the bottom surface portion 121, and does not exist on the central portion side in the longitudinal direction. The outdoor side wall portion 122b stands up from the outdoor side edge of the bottom surface portion 121 and is continuously formed from one side to the other in the longitudinal direction of the bottom surface portion 121. The connecting hole 122c is a through hole formed in the outdoor side wall portion 122b. The connecting hole 122c has a rectangular shape whose longitudinal direction is along the finding direction of the lower frame 12. The connecting hole 122c is formed to connect the sliding screw mechanism 2 described later and the arm portion 3 described later.

The lower frame cover 123 is a resin cover that covers the opening / closing mechanism storage portion 120. As shown in FIG. 3A, the lower frame cover 123 is a long member extending along the extending direction of the lower frame 12, and is arranged between the pair of vertical frames 13 and 14. The lower frame cover 123 has a pair of cover side wall portions 123a and a cover upper surface portion 123b. The cover side wall portion 123a is attached so as to form a continuous surface with the side wall portion 122 of the lower frame 12. As shown in FIG. 3B, in a state where the lower frame cover 123 is attached to the opening / closing mechanism storage portion 120, the indoor side cover side wall portion 123a is arranged between the indoor side side wall portions 122a of the lower frame. Although not shown, on the outdoor side, the outdoor side cover side wall portion 123a contacts the upper end of the outdoor side wall portion 122b and extends from one side to the other in the longitudinal direction of the lower frame cover 123. The outdoor side wall portion 123a also forms a continuous surface with the outdoor side wall portion 122b. The cover upper surface portion 123b connects the upper ends of the pair of cover side wall portions 123a and covers the upper surface of the opening / closing mechanism storage portion 120. The lower frame cover 123 is formed to be detachably attached to the opening / closing mechanism storage portion 120.

The shoji 50 is arranged in the frame body 10. The shoji 50 is rotatably attached about the upper frame 11 as an axis, and as shown in FIG. 1, is rotatably attached from the pair of vertical frames 13 and 14 and the lower frame 12 side in the indoor and outdoor directions. The shoji 50 has a stile 51 arranged inside the frame 10 and a glass 52. The stile 51 is assembled in a frame shape and has an upper stile 51a, a lower stile 51b, and a pair of vertical stiles 51c and 51d. As shown in FIG. 4C, the lower stile 51b is located below the lower end of the lower frame 12.

The electric opening / closing mechanism 1 for fittings is a mechanism that is driven by electric power to open / close the shoji 50. The electric opening / closing mechanism 1 for fittings includes a sliding screw mechanism 2, an arm unit 3, a drive unit 4, and a control unit 9.

As shown in FIGS. 4A and 4B, the sliding screw mechanism 2 has a screw shaft body 21, a guide rail 22, a nut body 23, and a drive unit connecting portion 24. The sliding screw mechanism 2 is a linear motion conversion mechanism that converts a rotary motion into a linear motion. The sliding screw mechanism 2 is configured such that the nut body 23 moves forward and backward by engaging the thread groove 210 of the screw shaft body 21, which will be described later, with the nut body screw groove 230 of the nut body 23.

The screw shaft body 21 is arranged on the bottom surface portion 121 of the lower frame 12 along the extending direction of the lower frame 12. The screw shaft body 21 is a substantially columnar rod having a thread groove 210 formed on the outer periphery thereof. A central shaft portion 213 having a diameter smaller than that of the central side in the longitudinal direction is formed at the end portion of the screw shaft body 21 in the longitudinal direction. The screw shaft body 21 floats upward from the bottom surface portion 121 because the central shaft portion 213 is supported by the first bearing bracket 211 and the second bearing bracket 212 that project upward from the bottom surface portion 121. The thread of the thread groove 210 is formed in a shape such as a triangle or a trapezoid. The screw shaft body 21 is made of a metal such as stainless steel or chrome molybdenum steel.

The guide rail 22 is a rectangular plate having a width narrower than that of the bottom surface portion 121 and a short length. The guide rail 22 is fixed on the bottom surface portion 121 and below the screw shaft body 21. The first bearing bracket 211 and the second bearing bracket 212 are fixed to both ends of the guide rail 22 in the longitudinal direction. The guide rail 22 guides the nut body 23 when the nut body 23, which will be described later, moves.

The nut body 23 is screwed into the screw shaft body 21 and is provided so as to be movable along the screw shaft body 21. In the present specification, the position of the nut body 23 with the shoji 50 closed is referred to as a closed position, and the side on which the nut body 23 is located at this time is referred to as a closed position side. FIG. 2 is a view of the electric fitting 100 viewed from the indoor side. As shown in FIG. 2, in the closed position, the nut body 23 is located on the left side of the frame body 10 when viewed from the indoor side, and is located at a position away from the drive unit 4 described later. The position of the nut body 23 with the shoji 50 open is called the open position, and the side where the nut body 23 is located at this time is called the open position side. FIG. 1 is a view of the electric fitting 100 viewed from the outdoor side. While referring to FIG. 1, if the open position is viewed from the indoor side, the nut body 23 is located on the right side and is adjacent to the drive unit 4. As shown in FIGS. 4A and 4B, the nut body 23 has a screw shaft engaging body 231, a damper portion 232, a grease cage 233, a nut bearing bracket 234, and a guide 235 (see FIG. 4C).

The screw shaft engaging body 231 is a resin component that engages with and moves in the thread groove 210 of the screw shaft body 21. As shown in FIG. 4B, the screw shaft engaging body 231 has a cylindrical portion 231a and a flange portion 231b. The tubular portion 231a has a hole through which the screw shaft body 21 is inserted in the center, and a nut body screw groove 230 that can be engaged with the screw groove 210 of the screw shaft body 21 is formed on the inner wall of the hole. The flange portion 231b extends outward from the opening on the open position side of the tubular portion 231a. The screw shaft engaging body 231 is made of, for example, a resin such as PPS or polyacetal or a metal such as phosphor bronze.

The nut bearing bracket 234 is a component that supports the screw shaft engaging body 231 and the damper portion 232 described later. The nut bearing bracket 234 has a bottom portion 234a and an upright wall 234b, and the bottom portion 234a and the upright wall 234b are joined so as to have a substantially L-shape in side view. The bottom portion 234a is mounted on the guide rail 22 via a connecting portion 31 of an arm portion 3, which will be described later.

As shown in FIG. 4C, the guide 235 is arranged so as to sandwich the guide rail 22 on one side and the other side in the width direction of the guide rail 22. The height dimension of the guide 235 is smaller than the height dimension of the guide rail 22. The guide 235 is coupled to the nut bearing bracket 234 via the connecting portion 31 of the arm portion 3 described later. The guide 235 does not come into contact with the bottom surface portion 121 and is in a floating state. The guide 235 supports the nut bearing bracket 234 so that it does not come off the guide rail 22 when the nut bearing bracket 234 advances and retreats along the guide rail 22.

The damper portion 232 is a component that covers the outside of the screw shaft engaging body 231 and accommodates the lubricating oil G inside to soften the friction due to the rotation of the screw shaft body 21. The damper portion 232 has a damper holder 232a and a cage accommodating portion 232b.

As shown in FIG. 5, the damper holder 232a has a main body portion 2321, a holder cover 2322, a holder lid 2323, a disc spring 2324, and a rubber 2325. The main body portion 2321 is a substantially cylindrical component that forms the outer shape of the damper portion 232. The holder cover 2322 is connected to the end of the damper holder 232a on the side not in contact with the screw shaft engaging body 231, that is, on the closed position side. The holder cover 2322 is a cylindrical component having the same outer diameter as the main body portion 2321. The holder lid 2323 is a substantially circular plate attached so as to close the closed end of the holder cover 2322 by the spring force of the disc spring 2324. A through hole is formed in the center of the holder lid 2323 so that the screw shaft body 21 can be inserted.

The disc spring 2324 is arranged inside the holder lid 2323. The disc spring 2324 is raised so as to project toward the holder lid 2323 side from the outer peripheral side to the inner peripheral side. The rubber 2325 is attached to the outside of the holder lid 2323 to alleviate the collision between the holder lid 2323 and the first bearing bracket 211 when the nut body 23 reaches the first bearing bracket 211.

The cage accommodating portion 232b is formed on the inner wall side of the main body portion 2321. As shown in FIG. 4B, the cage accommodating portion 232b is a substantially cylindrical hollow portion having a diameter larger than that of the hollow portion through which the screw shaft body 21 and the screw shaft engaging body 231 of the main body portion 2321 are inserted. The cage accommodating portion 232b is formed on the closed position side of the damper portion 232 and accommodates the grease cage 233 described later.

The grease cage 233 is housed in the cage housing section 232b of the damper section 232. As shown in FIG. 6, the grease cage 233 is configured by doubly stacking cylindrical parts. The grease cage 233 has an outer cage 236, an inner cage 237, and a grease accommodating portion 238. The grease cage 233 is rotatably housed in the cage accommodating portion 232b of the damper portion 232.

As shown in FIG. 6, the outer cage 236 has a cylindrical portion 236a, a lid portion 236b, a lid step portion 236d, and an inner cage accommodating portion 236e. The cylindrical portion 236a has an outer diameter that can be arranged in the cage accommodating portion 232b of the damper portion 232, and is arranged in the cage accommodating portion 232b. The lid portion 236b is a surface extending in the direction of closing the opening of the cylindrical portion 236a. A through hole 236c through which the screw shaft body 21 is inserted is formed on the center side of the lid portion 236b. The lid step portion 236d is a step formed by the outer peripheral side of the lid portion 236b projecting outward from the inner peripheral side. The disc spring 2324 comes into contact with the lid step portion 236d. The inner cage accommodating portion 236e is a recess of the outer cage 236 formed inside the cylindrical portion 236a and the lid portion 236b and capable of accommodating the inner cage 237.

As shown in FIG. 4B, a gap S in which the disc spring 2324 is arranged is formed between the outer cage 236 and the cage accommodating portion 232b. The end of the disc spring 2324 on the inner peripheral side is in contact with the inside of the holder lid 2323 in the damper holder 232a. As a result, the inner cage 237 easily rotates in the inner cage accommodating portion 236e without being affected by the spring force of the disc spring 2324.

As shown in FIG. 6, the inner cage 237 is overlapped and fixed to the inside of the outer cage 236, and is rotatably provided with respect to the nut body 23 and the outer cage 236. The inner cage 237 has a cylindrical portion 237a and a lid portion 237b. The cylindrical portion 237a is a tubular portion having an outer diameter that can be accommodated in the inner cage accommodating portion 236e of the outer cage 236. As shown in FIG. 7, a grease accommodating portion 238, which will be described later, is formed on the inner surface of the cylindrical portion 237a. The lid portion 237b is a surface extending in the closing direction of the opening on the closed position side of the cylindrical portion 237a, and a through hole 237c through which the screw shaft body 21 is inserted is formed on the center side.

The grease accommodating portion 238 is formed by the inner wall surface of the cylindrical portion 237a of the inner cage 237. The grease accommodating portion 238 has an eccentric hole 2380 that is eccentric with respect to the center of the screw shaft body 21. Since the eccentric hole 2380 has a larger inner diameter than the through hole 237c of the inner cage 237 and does not block the insertion direction of the screw shaft body 21, the screw shaft body 21 can be inserted. The eccentric hole 2380 is formed by forming the inner wall of the cylindrical portion 237a of the inner cage 237 partially thick and partially thin. The screw shaft body 21 inserts the damper portion 232 through the through hole 236c of the outer cage 236 and the through hole 237c of the inner cage 237 in the grease cage 233. As shown in FIGS. 4A, 4B and 8, the lubricating oil G is filled between the inner side surface of the eccentric hole 2380 and the screw shaft body 21.

The drive unit connection unit 24 is a cylindrical component that connects the screw shaft body 21 and the gear of the drive unit 4, which will be described later. The drive unit connecting portion 24 connects and fixes the shaft protruding from the screw shaft body 21 at the inner hollow portion and the shaft of the drive unit 4, which will be described later.

The drive unit 4 is a motor and has a gear that rotates around an output shaft (not shown). The drive unit 4 has a drive unit main body 41 and a speed reducer 42. The drive unit 4 drives the sliding screw mechanism 2 to rotate the screw shaft body 21.

The arm portion 3 connects the sliding screw mechanism 2 and the shoji 50 to open and close the shoji. The arm portion 3 has a connecting portion 31, a slide plate 32, and an operation arm 33.

The connecting portion 31 is a metal fitting obtained by bending a sheet metal member, and has a nut body connecting surface 311, a slide plate connecting surface 312, and a step portion 313. The nut body connecting surface 311 and the slide plate connecting surface 312 and the stepped portion 313 are integrally and continuously formed. As shown in FIG. 1, the connecting portion 31 is arranged and connected in parallel with the sliding screw mechanism 2.

The nut body connecting surface 311 is connected to the nut body 23 by arranging a flat plate surface under the nut body 23. More specifically, as shown in FIG. 4C, the nut body connecting surface 311 is arranged between the lower surface of the bottom 234a of the nut bearing bracket 234 of the nut body 23 and the upper surface of the guide rail 22 and the guide 235, and the nut. The bearing bracket 234, the nut body connecting surface 311 and the guide 235 are overlapped and fixed.

The slide plate connecting surface 312 is a flat plate surface extending to the outdoor side of the nut body connecting surface 311. The slide plate connecting surface 312 is fixed to the slide plate 32, which will be described later, with screws.

The step portion 313 is a portion that connects the nut body connecting surface 311 and the slide plate connecting surface 312. In the nut body connecting surface 311 and the slide plate connecting surface 312, the nut body connecting surface 311 is located above the slide plate connecting surface 312, and the slide plate connecting surface 312 is located below the nut body connecting surface 311. It is connected in the direction. The step portion 313 extends downward through the connecting hole 122c of the outdoor side wall portion 122b.

The slide plate 32 is a plate material that is located on the lower surface of the lower frame 51b of the shoji 50 with the shoji 50 closed, and moves toward the vertical frame 13 side when the shoji 50 is opened. The connecting portion 31 is fixed to the slide plate 32. As shown in FIG. 1, the slide plate 32 is arranged in parallel with the connecting portion 31 and the sliding screw mechanism 2.

The operation arm 33 is a member that connects the sliding screw mechanism 2 and the shoji 50. The operation arm 33 is made of a thin and flat plate material, and is housed under the slide plate 32 under the lower stile 51b of the shoji 50 while the shoji 50 is closed. The operation arm 33 bends stepwise and bends in a substantially half-moon shape so as to warp toward the outdoor side. As shown in FIG. 4C, a shaft portion 331 projecting upward is provided at the other end of the operation arm 33, and the shaft portion 331 engages with a recess 511 formed on the lower surface of the lower stile 51b of the shoji 50. It is connected by doing. The operation arm 33 is connected to the connecting portion 31 via a slide plate 32. When the slide plate 32 moves from the closed position side to the open position side as the slide plate 32 moves, the operation arm 33 draws an arc while interlocking with the slide plate 32 by the distance moved. It is pushed out to the outside of the room in the orbit and moves so as to protrude.

The control unit 9 is an electronic board arranged inside any one of the upper frame 11 and the pair of vertical frames 13, 14. As shown in FIG. 9, the control unit 9 includes a reception unit 91, a drive unit control unit 92, and a power supply control unit 93. The receiving unit 91 receives an instruction from a user transmitted from an operating device 94 such as a remote controller, for example. The power supply control unit 93 receives power from the external power supply 95 and supplies power to the drive unit control unit 92. The drive unit control unit 92 drives the sliding screw mechanism 2 to open and close the shoji 50.

The installation of the electric opening / closing mechanism 1 for fittings and the opening / closing operation of the shoji 50 will be described. When installing the electric fitting 100, the frame 10 is attached to the opening of the building. The opening / closing mechanism storage portion 120 of the lower frame 12 has an open upper portion, and the inside is in a state where it is easy to see. The sliding screw mechanism 2 and the driving unit 4 of the electric opening / closing mechanism 1 for fittings are arranged in the opening / closing mechanism storage unit 120, and the connecting portion 31 is connected to the nut body 23 in parallel with the sliding screw mechanism 2. After that, after connecting the arm portion 3 and the shoji 50, respectively, the opening / closing mechanism storage portion 120 is covered with the lower frame cover 123 and attached.

As shown in FIG. 2, in the closed position where the shoji 50 is closed, the nut body 23 of the sliding screw mechanism 2 is located on the guide rail 22 at the end opposite to the end on the drive portion 4 side. When the user operates the operating device 94 and a signal supporting the shoji 50 to open is transmitted to the electric fitting 100 and the receiving unit 91 of the control unit 9 receives the signal, the drive unit 4 is operated by the drive unit control unit 92. Is driven.

When the sliding screw mechanism 2 is driven by the driving unit 4, the screw shaft body 21 rotates. Since the screw shaft engaging body 231 of the nut body 23 is engaged with the screw shaft body 21, it moves along the screw shaft body 21. The nut body 23 moves on the guide rail 22 so as to approach the drive unit 4 side. According to the engagement between the screw shaft body 21 and the screw shaft engaging body 231, the position of the screw shaft engaging body 231 does not shift even when the power is not supplied.

As the nut body 23 moves, the connecting portion 31 of the arm portion 3 connected to the nut bearing bracket 234 of the nut body 23 moves. The connecting portion 31 is joined to the slide plate 32 located on the outdoor side by inserting the connecting hole 122c formed in the outdoor side wall portion 122b of the lower frame 12, and the sliding plate 31 is moved by the movement of the connecting portion 31. 32 also moves. An operation arm 33 bent so as to warp toward the outdoor side is connected to the slide plate 32. As the slide plate 32 moves, the operation arm 33 rotates so as to project outward. As a result, the shoji 50 is opened. When the nut body 23 reaches the end of the guide rail 22 on the drive portion 4 side, the shoji 50 is in the fully opened state.

Next, the internal movement of the nut body 23 will be described. While the sliding screw mechanism 2 is still new, the lubricating oil G filled in the grease accommodating portion 238 of the nut body 23 has sufficient lubricity, so that problems are unlikely to occur in the rotation of the screw shaft body 21. However, in the sliding screw mechanism 2, the screw shaft engaging body 231 moves back and forth due to the friction between the screw shaft body 21 and the screw shaft engaging body 231. Therefore, the wear caused by the wear of the portion where the screw shaft body 21 and the screw shaft engaging body 231 rub against each other. The powder may be mixed in the lubricating oil G. The wear debris accumulates around the screw shaft body 21, that is, on the inner peripheral side of the grease accommodating portion 238. When the grease cage 233 is fixed, the wear debris does not easily move in the lubricating oil G to the outer peripheral side of the grease accommodating portion 238. When the grease cage 233 is fixed, the wear debris continues to be mixed with the lubricating oil G on the inner peripheral side of the grease accommodating portion 238, so that the lubricating oil G on the inner peripheral side of the grease accommodating portion 238 is hardened due to aged deterioration. Lubrication performance tends to deteriorate. A soft lubricating oil G with relatively little wear debris is held on the outer peripheral side of the grease accommodating portion 238 due to the influence of centrifugal force, shearing force, etc. acting on the grease.

In the present embodiment, the inner cage 237 arranged inside the grease cage 233 is rotatably held in the cage accommodating portion 232b of the nut body 23. The grease accommodating portion 238 formed in the inner cage 237 of the grease cage 233 is formed to have an eccentric hole 2380. A screw shaft body 21 is inserted in the center of the eccentric hole 2380. When the lubricating oil G deteriorates around the screw shaft body 21 in the eccentric hole 2380 and hardens and the lubrication performance deteriorates, when the screw shaft body 21 tries to rotate, the lubricating oil in the screw shaft body 21 and the grease accommodating portion 238 Viscous resistance between G increases. When the viscous resistance increases, as shown in FIG. 8, when the screw shaft body 21 rotates, a shearing force in the direction of the arrow is generated in the cured lubricating oil G between the grease accommodating portion 238 and the screw shaft body 21. .. The inner cage 237 is rotated by the shearing force generated by the lubricating oil G hardened by use. When the inner cage 237 is rotated, the hardened lubricating oil G and the relatively soft lubricating oil G are mixed.

According to this embodiment, the following effects are achieved. The electric fitting 1 was provided on the frame 10 and the electric fitting 100 having the shoji 50 arranged in the frame 10, and the shoji 50 was opened and closed. A sliding screw mechanism 2 having an electric opening / closing mechanism 1 for fittings screwed into a screw shaft body 21 and a screw shaft body 21 arranged along a frame body 10 and having a nut body 23 movable along the screw shaft body 21. An arm portion 3 connected to the sliding screw mechanism 2 and the obstacle 50 to open and close the obstacle 50, and a driving unit 4 for driving the sliding screw mechanism 2 are included. The sliding screw mechanism 2 has a high rigidity of engagement between the nut body 23 and the screw shaft body 21, and is difficult to move even if a force is applied in an unintended direction. Therefore, it is possible to prevent the nut body 23 from moving along the screw shaft body 21 and shifting its position while the power is not supplied, and it is possible to realize a highly rigid opening / closing mechanism.

According to the present embodiment, the arm portion 3 is connected to the connecting portion 31 connected to the sliding screw mechanism 2, and the operating arm 33 connected to the connecting portion 31 to move the shoji 50 with the movement of the sliding screw mechanism 2. , Including. The sliding screw mechanism 2 is arranged in parallel with the connecting portion 31. By arranging the sliding screw mechanism 2 and the connecting portion 31 in parallel, the positions of the sliding screw mechanism 2 and the connecting portion 31 can be easily grasped when viewed from above. Therefore, the mounting accuracy of the electric opening / closing mechanism 1 for fittings can be improved. By assembling the parts constituting the electric opening / closing mechanism 1 for fittings with high accuracy and accuracy, unnecessary force acts in addition to the movable flow line of the linear motion of the sliding screw mechanism 2 and the accompanying opening / closing motion of the arm. It becomes difficult. As a result, there are effects such as reduction of noise caused by friction between parts, reduction of electric power by preventing unnecessary consumption of electric power, and improvement of durability.

According to the present embodiment, the electric fitting 100 is configured to include the above-mentioned electric opening / closing mechanism 1 for fittings, a frame body 10, and a shoji screen 50 arranged in the frame body 10. The frame body 10 includes an opening / closing mechanism storage unit 120 in which the sliding screw mechanism 2 is arranged, and a lower frame cover 123 covering the opening / closing mechanism storage unit 120. When installing the sliding screw mechanism 2, the lower frame cover 123 can be removed and installed, and the opening / closing mechanism storage unit 120 can be covered with the lower frame cover 123 after installation. Therefore, the workability at the time of mounting is further improved, and the mounting accuracy can be improved. Further, even if the electric opening / closing mechanism 1 for fittings breaks down, it is easy to make a diagnosis and the maintainability can be improved. In addition, by covering with the lower frame cover 123, the mechanical appearance of the electric opening / closing mechanism 1 for fittings can be hidden and the design of the electric fittings 100 can be improved.

The present disclosure is not limited to the above-described embodiment, and modifications, improvements, etc. to the extent that the object of the present disclosure can be achieved are included in the present disclosure. In the above embodiment, a side-sliding window has been described as an example of an electric fitting. The electric fitting may be a vertical sliding window, an extrusion window, a door, a louver, a shutter, or the like, and is not particularly limited as long as it is a fitting provided with an electric opening / closing mechanism for fitting.

In the above embodiment, the sliding screw mechanism 2, the driving unit 4, and the connecting unit 31 are arranged and assembled to the opening / closing mechanism storage unit 120, and the opening / closing mechanism storage unit 120 is covered by the lower frame cover 123. However, the electric opening / closing mechanism for fittings does not necessarily have to be built in the fittings. The electric opening / closing mechanism for fittings may be retrofitted to the fittings.

1 Electric opening / closing mechanism for fittings, 2 Sliding screw mechanism, 3 Arm part, 4 Drive part, 10 Frame body, 21 Screw shaft body, 23 Nut body, 31 Connecting part, 33 Operation arm, 50 Shoji, 100 Electric fittings, 120 Opening / closing Mechanism storage part, 123 Lower frame cover (cover part)

Claims (3)

An electric opening / closing mechanism for fittings that is provided on a frame and a fitting having a shoji placed inside the frame and opens / closes the shoji.
A sliding screw mechanism having a screw shaft body arranged along the frame body and a nut body screwed to the screw shaft body and movable along the screw shaft body, and a sliding screw mechanism.
The sliding screw mechanism and the arm portion connected to the shoji to open and close the shoji, and
An electric opening / closing mechanism for fittings, comprising a drive unit for driving the sliding screw mechanism. The arm portion includes a connecting portion connected to the sliding screw mechanism and a connecting portion.
It has an operation arm that is connected to the connecting portion and moves the shoji with the movement of the sliding screw mechanism.
The electric opening / closing mechanism for fittings according to claim 1, wherein the sliding screw mechanism is arranged in parallel with the connecting portion. The electric opening / closing mechanism for fittings according to claim 1 or 2.
With the frame
With the shoji placed in the frame,
The frame body is an electric fitting having an opening / closing mechanism accommodating portion in which the sliding screw mechanism is arranged and a cover portion covering the opening / closing mechanism accommodating portion.

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