JP2010150797A - Opening and closing device of opening and closing body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening and closing device of an opening and closing body, which does not generate a big noise when the opening and closing body is opened and closing by an electric motor. <P>SOLUTION: A screw member 53 is screwed to a screw rod 52 which is turned by the electric motor 51 and an arm 54 is attached to the screw member 53. The screw member 53 is moved by turning the screw rod 52 by means of the electric motor 51, so that the arm 54 operates a link mechanism 3 for opening and closing the opening and closing body 2. The screw member 53 is constituted of a resin internal thread body 60 held by a metal screw holding body 70 while the screw rod 52 is screwed into the resin internal thread body 60, and the arm 54 is attached to the screw holding body 70, so as to prevent a metal contact noise and a vibrational noise from being generated from the screwed portion of the screw rod 52, and the screw member 53. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an opening / closing device for an opening / closing body that moves the opening / closing body with an electric drive mechanism.

Conventionally, various windows have been proposed in which a shoji is attached to a frame so as to be movable between an open position and a closed position.
In the windows described above, it is common for people to move the shoji to the open and closed positions by hand, and to open and close them. However, windows that are installed in high places where human hands cannot reach, such as smoke exhaust windows. In Japanese Patent Application Laid-Open No. 2004-259542, the shoji is moved to an open position and a closed position by an electric drive mechanism to open and close.

  For example, as disclosed in Patent Document 1, a screw rod is rotated by an electric motor, a female screw body is screwed into the screw rod, the female screw body and a shoji are connected by a link mechanism, and the screw rod is rotated. Has proposed a window in which the internal thread body is moved by the link mechanism so that the shoji moves between the open position and the closed position by a link mechanism.

Japanese Utility Model Publication No. 6-50631

According to the conventional window described above, the shoji can be moved between the open position and the closed position by driving the electric motor forward and backward, so there is no need to open and close the shoji with a human hand. It is preferable as a window installed at a high place.
However, in the conventional window described above, when the screw rod is rotated to open and close the shoji, a large metal contact noise is generated from the screwed portion of the screw rod and the female screw body due to the vibration of the screw rod transmitted from the electric motor. In addition, since the female screw body vibrates together, a large noise is generated when the shoji is opened and closed.

  An object of the present invention is to provide an opening / closing device for an opening / closing body that can be opened / closed by an electric motor and that no large noise is generated when the opening / closing body is opened / closed.

The present invention is an opening / closing device for an opening / closing body that moves the opening / closing body 2 between a closed position and an open position by operating the link mechanism 3 with an electric drive mechanism 5,
The electric drive mechanism 5 includes an electric motor 51, a screw rod 52 that is rotated forward and backward by the electric motor 51, a screw member 53 into which the screw rod 52 is screwed, and an arm 54 attached to the screw member 53. The screw member 53 is moved by the rotation of the screw rod 52, and the link mechanism 3 is operated by the arm 54 by the movement of the screw member 53;
The screw member 53 includes a female screw body 60 made of resin and screwed with the screw rod 52, and a metal screw holding body 70 that holds the female screw body 60.
An opening / closing device for an opening / closing body, wherein the arm 54 is attached to the screw holder 70.

  In the present invention, the female screw body 60 divided into a plurality of parts and the screw holding body 70 divided into a plurality of parts are combined to form the screw member 53 that holds the female screw body 60 so that the screw holding body 70 does not rotate. Can do.

  In this way, since the vibration in the rotation direction of the electric motor 51 itself is absorbed by the screw member 53, the noise generated at the screwed portion of the screw rod 52 and the screw member 53 due to the vibration of the electric motor 51 itself is reduced. To do.

  In the present invention, buffer members 77 are provided between both end surfaces in the moving direction of the female screw body 60 and the screw holder 70, and both end surfaces of the female screw body 60 are held by the screw holder 70 with the buffer member 77 interposed. You can do that.

  In this way, since the vibration in the axial direction of the electric motor 51 itself is absorbed by the buffer member 77 in the screw member 53, the screw rod 52 and the screw member 53 are screwed together by the vibration in the axial direction of the electric motor 51 itself. Noise generated in the part is reduced.

  In the present invention, the screw member 53 can be provided in the housing 50, and the brake means 90 that presses the screw holder 70 of the screw member 53 against the housing 50 can be provided.

  In this way, when the load acting on the screw member 53 from the opening / closing body 2 side fluctuates and is transmitted to the screw member 53 as vibration, the brake means 90 prevents the screw holder 70 from moving due to the vibration. Since the opening / closing body 2 is being opened / closed, the opening / closing body 2 is beaten by a strong wind or the load fluctuates, and the pulsating sound (chattering noise) generated in the load direction or the gap ( Sound due to backlash can be reduced.

In the present invention, a brake plate is attached to the screw holder 70 of the screw member 53, and the brake plate is pressed against the housing 50 by an elastic member to form the brake means 90.
The screw holder 70 may be provided with a rotation stopper 80 that contacts the housing 50 and prevents the screw member 53 from rotating.

If it does in this way, the movement resistance of the screw member 53 can be enlarged because a brake plate contacts the housing 50. FIG.
Further, the rotation of the screw member 53 is prevented by the rotation stopper 80, and the screw member 53 can be moved along the housing 50 by the rotation of the screw rod 52.

In the present invention, the female screw body 60 includes a first female screw body 61 having a semicircular female screw portion 61b, and a second female screw body 62 having a semicircular female screw portion 62b.
The screw holding body 70 includes a one-side screw holding body 71 and an other-side screw holding body 72. The one-side / other-side screw holding bodies 71, 72 include a recessed portion 73 opened to the inner side surfaces 71a, 72a, and an upper surface. 71d and 72d and semicircular holes 76 formed in the lower surfaces 71e and 72e. The semicircular holes 76 are continuous with the recessed portions 73 and open to the inner side surfaces 71a and 72a.
The one side female screw body 61 and the other side female screw body 62 are fitted and attached to the concave portions 73 of the one side / other side screw holding bodies 71 and 72 so as not to rotate,
The one-side screw holding body 71 and the other-side screw holding body 72 are connected so that their inner side surfaces 71a and 72a are in contact with each other, and the screw holding body has a circular hole through which the screw rod 52 is inserted through each semicircular hole 76. 70, and a female screw body 60 having a circular female screw portion into which the screw rod 52 is screwed by the semicircular female screw portions 61b and 62b.

  If it does in this way, the screw member 53 which hold | maintained the internal thread body 60 with the screw holding body 70 can be assembled easily.

According to the present invention, since the screw rod 52 is screwed into the female female screw body 60, no metal contact sound is generated from the screwed portion.
Therefore, the opening / closing body 2 can be opened / closed by the electric motor 51, and no large noise is generated when the opening / closing body 2 is opened / closed.
Further, since the arm 54 is attached to the metal screw holder 70, the arm 54 can be firmly attached to the screw member 53.
Further, since the female female screw body 60 is reinforced by the metal screw holding body 70, the screw member 53 has excellent durability.

As shown in FIG. 1, a frame 1 is provided as an opening / closing body 2 so that a shoji can be opened / closed to form a window.
The frame 1 has an upper frame 10, a lower frame 11, and left and right vertical frames 12 connected in a square shape.
The shoji 2 has an upper gutter 20, a lower gutter 21, and left and right vertical gutters 22 connected in a square shape, and a panel member 23 is mounted therein.
A link mechanism 3 is attached across the frame body 1 and the opening / closing body 2.
For example, the left and right link mechanisms 3 are attached to the left and right vertical rods 22 near the upper part and the left and right vertical frames 12, respectively.
The left and right link mechanisms 3 are interlocked by an interlock shaft 4, and the left and right link mechanisms 3 operate in synchronization.
An electric drive mechanism 5 is attached to the frame 1, for example, one of the left and right vertical frames 12.
By operating the left and right link mechanism 3 by this electric drive mechanism 5, the other link mechanism 3 is also operated in synchronism, thereby opening and closing the opening / closing body 2, thereby providing an opening / closing device for the opening / closing body.
In FIG. 1, for easy understanding, the link mechanism 3 and the interlocking shaft 4 are illustrated by phantom lines, and the electric drive mechanism 5 is illustrated by dotted lines.

As shown in FIGS. 2 and 3, the link mechanism 3 includes a lower link 30 attached to the lower frame 11 so as to be swingable up and down, and an upper link 31 attached so as to be able to swing up and down near the upper portion of the vertical frame 12. The intermediate link 32 attached to the middle of the vertical frame 12 so as to be vertically movable, the interlocking rod 33 attached so as to be vertically movable along the vertical frame 12, and the lower portion of the interlocking rod 33 and the lower link 30 are connected. The connecting link 34 is provided.
The upper link 31 is rotatably connected to the upper portion of the vertical rod 22, and the intermediate link 32 is rotatably connected to the upper and lower middle of the vertical rod 22.
The intermediate link 32 has a guide recess 32a along the longitudinal direction, and a slider 35 attached to the interlocking rod 33 slides along the guide recess 32a.

When the guide recess 32a of the intermediate link 32 has a square shape and the slider 35 is positioned near the upper portion of the guide recess 32a, the intermediate link 32 is positioned in the vertical frame 12 as shown in FIG. The opening / closing body 2 is in the closed position as shown in FIG.
When the slider 35 is positioned near the lower portion of the guide recess 32a, the intermediate link 32 projects outwardly from the vertical frame 12 as shown in FIG. 3, and the opening / closing body 2 opens as shown in FIG. Position.

When the lower link 30 is swung upward, the interlocking rod 33 is moved upward by the connecting link 34, and the slider 35 is positioned closer to the upper portion of the guide recess 32a as shown in FIG.
When the lower link 30 is swung downward, the interlock rod 33 is moved downward by the connecting link 34, and the slider 35 is positioned near the lower portion of the guide recess 32a as shown in FIG.
Thus, the opening / closing body 2 can be moved between the closed position and the open position by swinging the lower link 30 up and down.

The lower link 30 is fixed to the interlocking shaft 4 described above, and the lower link 30 of the left and right link mechanisms 3 swings up and down in synchronization with the interlocking shaft 4.
Therefore, the opening / closing body 2 can be smoothly opened and closed by swinging the lower link 30 of the left and right link mechanism 3 up and down by the electric drive mechanism 5.

In FIGS. 2 and 3, the shoji 2 is illustrated by a virtual line so that the configuration of the link mechanism 3 can be easily understood.
The link mechanism 3 of the present invention is not limited to the one described above, and various types of link mechanisms conventionally used can be used.

The electric drive mechanism 5 includes an electric motor 51, a screw rod 52, a screw member 53, and an arm 54 provided in a housing 50.
The screw rod 52 is rotated forward and backward by the electric motor 51, whereby the screw member 53 moves up and down without rotating.
A base end portion of an arm 54 is connected to the screw member 53 so as to be able to swing up and down, and a distal end portion of the arm 54 protrudes outside from an opening 50 a of the housing 50 and is connected to the lower link 30.

When the screw rod 52 is rotated forward by the electric motor 51 and the screw member 53 is moved upward, as shown in FIG. 2, the arm 54 is moved upward and the lower link 30 is swung upward, as described above. The opening / closing body 2 is set to the closed position.
When the screw rod 52 is reversely rotated by the electric motor 51 and the screw member 53 is moved downward, the arm 54 is moved downward and the lower link 30 is swung downward as shown in FIG. The opening / closing body 2 is set to the open position.
Thus, the opening / closing body 2 can be opened and closed by the electric drive mechanism 5.

Next, details of the electric drive mechanism 5 will be described.
As shown in FIG. 4, the housing 50 includes a hollow main body 55, an upper surface cover 56 attached to the upper portion of the main body 55, and a lower surface cover 57 attached to the lower portion of the main body 55.
As shown in FIG. 5, the main body 55 is a hollow long material having a substantially rectangular cross-section with one side plate 55a and the other side plate 55b facing each other, one end plate 55c and the other end plate 55d facing each other, and a plurality of screw holes 55e. Continuously in the longitudinal direction. For example, an aluminum extruded shape.
As shown in FIG. 4, the upper surface cover 56 is fixedly attached to the upper portion of the main body 55 with screws screwed into the screw holes 55e, and has mounting holes 56a.
The lower surface cover 57 is fixedly attached to the lower portion of the main body 55 with screws screwed into the screw holes 55e, and has mounting holes 57a and screw rod support holes 57b.
The opening 50 a is formed in the other end plate 55 d of the main body 55.

An output shaft 51 a of the electric motor 51 is connected to an upper portion of the screw rod 52 through a coupling 58.
A lower portion of the screw rod 52 is rotatably supported by a bearing 59 in a hole 57b of the lower surface cover 57.
The screw rod 52 is made of metal.

As shown in FIG. 5, the screw member 53 includes a female screw body 60 and a screw holder 70 that holds the female screw body 60 so as not to rotate.
The female screw body 60 is made of resin. For example, it is injection molded using polyacetal.
The screw holder 70 is made of metal. For example, it is manufactured by zinc die casting.
A screw rod 52 is screwed onto the female screw body 60.
The arm 54 is attached to the screw holder 70 so as to be swingable up and down.

Thus, the screw holder 52 is moved up and down together with the female screw body 60 by rotating the screw rod 52 forward and backward with the electric motor 51, thereby moving the arm 54 up and down. The opening / closing body 2 can be opened and closed.
Further, since the metal screw rod 52 is screwed into the resin female screw body 60 and does not contact the metal screw holding body 70, a metal contact sound is generated from the screwed portion of the screw rod 52 and the screw member 53. Therefore, no loud noise is generated when the opening / closing body 2 is opened and closed.
In addition, since the female female screw body 60 is held by the metal screw holding body 70 and the arm 54 is attached to the screw holding body 70, the arm 54 can be firmly attached to the screw member 53 and the female screw body. Since 60 is reinforced by the screw holder 70, the screw member 53 is excellent in durability.

The female screw body 60 and the screw holding body 70 are divided into a plurality of parts, and the screw member 53 holds the female screw body 60 so as not to rotate by the screw holding body 70 by combining them. The division is in the rotational direction and is divided so as to be attachable with the screw rod 52 interposed therebetween.
Thus, the vibration in the rotation direction of the electric motor 51 itself is absorbed between the plurality of female screw bodies 60 and the plurality of screw holders 70, and the screw rod 52 is caused by the vibration in the rotation direction of the electric motor 51 itself. Noise generated at the threaded portion of the screw member 53 is reduced.

Further, the upper and lower end surfaces (that is, both end surfaces in the moving direction) of the female screw body 60 are not directly held by the screw holding body 70 but are held via a buffer member.
Thus, since the vibration in the axial direction of the electric motor 51 itself can be absorbed by the buffer member, noise generated in the screwed portion of the screw rod 52 and the screw member 53 due to the vibration in the axial direction of the electric motor 51 itself. To reduce.

Next, the division of the female screw body 60 and the screw holding body 70 will be described.
The female screw body 60 is divided into one side female screw body 61 and the other side female screw body 62, and the screw holding body 70 is also divided into one side screw holding body 71 and another side screw holding body 72.
The one-side female screw body 61 is semicircular, has a groove-like female screw portion that fits into the thread of the screw rod 52, and is held by the one-side screw holding body 71 so as not to rotate. It is semicircular and has a groove-like female thread portion similar to that described above, and is held by the other-side screw holder 72 so as not to rotate.
Then, by connecting the one-side screw holding body 71 and the other-side screw holding body 72 in combination, the one-side female screw body 61 and the other-side female screw body 62 abut each other to form a female screw body 60 having a circular female screw portion. At the same time, a screw holder 70 having a circular hole through which the screw rod 52 is inserted is formed.

The screw holder 70 includes a rotation stopper 80 that contacts the housing 50 (the inner surface of the main body 55) and prevents the screw member 53 from rotating.
For example, the one-side plate 81 for preventing rotation is attached to the one-side screw holder 71, and the other side plate 82 for preventing rotation is attached to the other-side screw holder 72.
The one side plate 81 is in contact with the one side plate 55a and the screw hole 55e portion of the main body 55, and the other side plate 82 is in contact with the other side plate 55b and the screw hole 55e portion of the main body 55 and supported by the main body 55 so as not to rotate the screw holder 70. To do. When the screw rod 52 rotates clockwise in FIG. 5, the one side plate 81 presses against the inner surface of the housing 50 to endure rotation, and when it rotates counterclockwise, the other side plate 82 presses against the inner surface of the housing 50 to endure rotation.
The one side plate 81 and the other side plate 82 (that is, the rotation stopper 80) are made of resin.
Thus, when the screw member 53 moves up and down, the one side plate 81 and the other side plate 82 slide along the inner surface of the main body 55, but a metal rubbing sound is generated from the sliding portion. There is nothing.

The screw holder 70 increases the resistance when the screw holder 70 moves up and down, and the brake means 90 prevents the screw holder 70 from moving due to a load acting on the screw member 53 via the arm 54 from the opening / closing body 2 side. It has. For example, a brake plate provided on the screw holder 70 is pressed against the inner surface of the housing 50.
Specifically, a one-side brake plate 91 is provided on the one-side screw holder 71, and the one-side brake plate 91 is pressed against the inner surface of the housing 50 (one side plate 55a of the main body 55) by an elastic member.
The other-side brake plate 92 is provided on the other-side screw holder 72, and the other-side brake plate 92 is pressed against the inner surface of the housing 50 (the other side plate 55b of the main body 55) by an elastic member.
The one side brake plate 91 and the other side brake plate 92 are made of resin.

  Thus, when the load acting on the screw member 53 from the opening / closing body 2 side fluctuates and is transmitted to the screw member 53 as vibration, the brake means 90 prevents the screw holder 70 from moving due to the vibration. Therefore, it is possible to reduce the pulsation sound (battering sound) and backlash sound that are generated when the load changes due to the open / close body 2 being beaten by strong wind while the open / close body 2 is being opened / closed.

The details of the screw member 53 will be described with reference to FIGS. In FIG. 6, the illustration of the screw rod 52 is omitted for easy understanding of the screw member 53.
The one side female threaded body 61 and the other side female threaded body 62 have a non-circular outer peripheral surface, for example, a rectangular shape, have a substantially square shape, and have semicircular female threaded portions 61b and 62b opened on the inner side surfaces 61a and 62a. is doing.
Chamfers 61c and 62c are machined at the two corners of the outer peripheral surface.

Opposite inner side surfaces 71a and 72a of the one-side screw holding body 71 and the other-side screw holding body 72 have recesses 73 for female screw mounting opposite to each other, and the opposite inner side surfaces 71a and 72a The opposite outer surfaces 71b and 72b have brake plate mounting recesses 74, respectively.
One end surfaces 71c and 72c connecting the inner side surfaces 71a and 72a and the outer side surfaces 71b and 72b respectively have hook-shaped concave portions 75 for attaching a rotation stopper. The outer side surfaces 71b and 72b face the one side plate 55a and the other side plate 55b.
The upper and lower surfaces 71d and 72d and the lower surfaces 71e and 72e of the one-side screw holding body 71 and the other-side screw holding body 72 have semicircular holes 76, respectively. The semicircular holes 76 open to the inner side surfaces 71a and 72a. And is continuous with the upper and lower portions of the recessed portion 73.

The recessed portion 73 is non-circular, for example, rectangular, and fits so that the one-side / other-side female screw bodies 61, 62 do not rotate. That is, the resin female screw body 60 is only fitted and held in the metal screw holding body 70 and is not fixed by a screw or the like. Therefore, after the vibration of the screw rod 52 is transmitted to the female screw body 60, the screw Since the vibration is considerably attenuated before being transmitted to the holding body 70, the vibration is hardly transmitted to the arm 54, and as a result, noise due to the vibration of the opening / closing body 2 is hardly generated.
The semicircular hole 76 is sized to allow the screw rod 52 to be inserted therein. The semicircular hole 76 is smaller than the recessed portion 73, and the upper surface and the lower portion of the recessed portion 73 are continuous with the hook-shaped downward surface 73 a, It has an upward surface 73b.
The vertical dimension of the one-side / other-side female screw bodies 61, 62 is smaller than the vertical dimension between the downward surface 73a and the upward surface 73b, and the upper end surfaces 61d, 62d of each female screw body 61, 62 are The buffer member 77 described above is provided between the facing surface 73a, and between the lower end surfaces 61e and 62e and the upward surface 73b, and the moving direction of the one-side / other-side female screw bodies 61 and 62 (the screw rod 52). Both end surfaces in the longitudinal direction) are held by the screw holder 70 via the buffer member 77.
The buffer member 77 is preferably an annular ring-shaped member such as a urethane ring or an o-ring having excellent elasticity.

Thus, both end surfaces in the moving direction of the one-side female screw body 61 and the other-side female screw body 62 are not directly held by the one-side screw holding body 71 and the other-side screw holding body 72. 77, the vibration in the axial direction of the electric motor 51 itself can be absorbed as described above.
In addition, when the screw rod 52 is rotated forward and backward, the impact is reduced even if the one-side / other-side female screw bodies 61, 62 suddenly move up and down with respect to the one-side / other-side screw holding bodies 71, 72. There is no transmission to the side and other side screw holders 71, 72.
Therefore, since the screw member 53 can start to move up and down smoothly, the opening and closing body 2 can be started to open and close smoothly.

The one side plate 81 and the other side plate 82 are fixedly attached to the hook-shaped concave portions 75 of the one side screw holding body 71 and the other side screw holding body 72 with bolts 83, respectively.
The one-side brake plate 91 and the other-side brake plate 92 are fitted into the recesses 74 of the one-side screw holding body 71 and the other-side screw holding body 72 so as to be able to enter and exit, and the back surfaces 91a and 92a and the bottom surface 74a of the recess 74 are formed. An elastic member 93, such as a sponge or a spring, is provided therebetween, and the surfaces 91b and 92b are pressed against the one side plate 55a and the other side plate 55b of the main body 55.

The one-side screw holder 71 and the other-side screw holder 72 are connected by bolts 78 so that the inner side surfaces 71a and 72a thereof face each other.
The inner side surface 71a of the one-side screw holding body 71 and the inner side surface 72a of the other-side screw holding body 72 are in contact with each other, and a semicircular hole 76 forms a circular hole through which the screw rod 52 is inserted.
Further, a gap of about 1 mm is formed between the inner side surface 61a of the one side female screw body 61 and the inner side surface 62a of the other side female screw body 62, and the screw rod 52 is formed by the semicircular female screw portions 61b and 62b. A circular female thread portion to be screwed is formed.

An arm mounting groove 79 is formed on the other end surface 71 f of the one-side screw holder 71.
The base end portion of the arm 54 is inserted into the arm mounting groove 79 and connected to the pin 54a so as to be swingable up and down.

In the above-described embodiment, the opening / closing device that opens and closes the shoji of the window is used and the opening / closing body 2 is the shoji. However, the present invention is not limited thereto.
For example, the present invention can also be used for an opening / closing device that opens and closes a hatch that opens like a double door, and an opening / closing device that opens and closes a door of a house under the floor.
In these cases, the hatch and door serve as an opening / closing body.

It is an external view of a window. It is a longitudinal cross-sectional view of the window in the state where the shoji was closed. It is a longitudinal cross-sectional view of the window of the state where the shoji was opened. It is an expansion detail drawing of an electric drive device. It is an AA expanded sectional view of FIG. It is BB expanded sectional drawing of FIG. It is CC sectional drawing of FIG. It is a disassembled perspective view of a screw member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Frame body, 2 ... Opening / closing body, 3 ... Link mechanism, 4 ... Electric switchgear, 50 ... Housing, 51 ... Electric motor, 52 ... Screw rod, 53 ... Screw member, 54 ... Arm, 60 ... Female screw body, 61 ... one-side female screw body, 61b ... semicircular female screw portion, 61d ... upper end surface, 61e ... lower end surface, 62 ... other side female screw body, 62b ... semicircular female screw portion, 62d ... upper end surface, 62e ... lower end surface, 70 DESCRIPTION OF SYMBOLS ... Screw holder, 71 ... One side screw holder, 72 ... Other side screw holder, 73 ... Recessed part, 73a ... Down surface, 73b ... Up surface, 76 ... Semicircular hole, 77 ... Buffering member, 80 ... rotation stop, 90 ... brake means.

Claims (6)

An opening / closing device for an opening / closing body that moves the opening / closing body 2 between a closed position and an open position by operating the link mechanism 3 with an electric drive mechanism 5;
The electric drive mechanism 5 includes an electric motor 51, a screw rod 52 that is rotated forward and backward by the electric motor 51, a screw member 53 into which the screw rod 52 is screwed, and an arm 54 attached to the screw member 53. The screw member 53 is moved by the rotation of the screw rod 52, and the link mechanism 3 is operated by the arm 54 by the movement of the screw member 53;
The screw member 53 includes a female screw body 60 made of resin and screwed with the screw rod 52, and a metal screw holding body 70 that holds the female screw body 60.
An opening / closing device for an opening / closing body, wherein the arm 54 is attached to the screw holder 70.   The opening and closing according to claim 1, wherein the female screw body 60 divided into a plurality of parts and the screw holding body 70 divided into a plurality of parts are combined to form a screw member 53 that holds the female screw body 60 so as not to rotate by the screw holding body 70. Body opening and closing device.   The buffer member 77 is provided between the both end surfaces in the moving direction of the female screw body 60 and the screw holding body 70, and the both end surfaces of the female screw body 60 are held by the screw holding body 70 with the buffer member 77 interposed therebetween. The opening / closing device of the opening / closing body of 2.   The opening / closing device for an opening / closing body according to any one of claims 1 to 3, wherein the screw member 53 is provided in the housing 50, and a brake means 90 is provided to press the screw holding body 70 of the screw member 53 against the housing 50. . A brake plate is attached to the screw holder 70 of the screw member 53, and the brake plate is pressed against the housing 50 by an elastic member to form a brake means 90.
The opening / closing device for an opening / closing body according to claim 3, wherein the screw holding body is provided with a rotation stopper that prevents the screw member 53 from rotating in contact with the housing. The female screw body 60 includes a first female screw body 61 having a semicircular female screw portion 61b, and a second female screw body 62 having a semicircular female screw portion 62b.
The screw holding body 70 includes a one-side screw holding body 71 and an other-side screw holding body 72. The one-side / other-side screw holding bodies 71, 72 include a recessed portion 73 opened to the inner side surfaces 71a, 72a, and an upper surface. 71d and 72d and semicircular holes 76 formed in the lower surfaces 71e and 72e. The semicircular holes 76 are continuous with the recessed portions 73 and open to the inner side surfaces 71a and 72a.
The one side female screw body 61 and the other side female screw body 62 are fitted and attached to the concave portions 73 of the one side / other side screw holding bodies 71 and 72 so as not to rotate,
The one-side screw holding body 71 and the other-side screw holding body 72 are connected so that their inner side surfaces 71a and 72a are in contact with each other, and the screw holding body has a circular hole through which the screw rod 52 is inserted through each semicircular hole 76. The opening / closing body of the opening / closing body according to any one of claims 1 to 5, wherein the female screw body 60 has a circular female screw portion in which the screw rod 52 is screwed by the semicircular female screw portions 61b and 62b. apparatus.

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