JP4222336B2 - Window opening / closing assist mechanism - Google Patents

Description

  The present invention relates to a window opening / closing assist mechanism that assists an operation at the start of movement of an opening / closing body attached to a window.

  There has been a conventional technique related to an assist mechanism that assists an operation for moving a shoji within a window frame (see, for example, Patent Document 1). This is because a pivotable handle is provided at the end of the shoji, and when this handle is operated, a roller located on the opposite side across the fulcrum of the operating section presses the window frame, and the reaction force is applied to the shoji. As a result, the force for moving the shoji is assisted due to the lever ratio of the handle. In recent years, in order to ensure the airtightness of the room, the shoji often engages with the sealing material provided on the window frame in the closed state, and when the shoji is moved toward the open position, Since it must be moved away from the sealing material, a great amount of force is required. The prior art described above is highly useful in this respect.

However, according to this prior art, when the handle is operated, the roller pushes the window frame facing the end of the shoji in the direction away from the shoji, so the shoji in the closed state is moved. Although the assist function works effectively, when the shoji starts moving from the middle position in the open / closed state, the roller does not reach the window frame even if the handle is operated, and the operation may be supported. could not.
JP 2004-353378 A (FIG. 13)

  The present invention has been completed based on the above situation, and a window opening / closing assist mechanism capable of assisting operation at the start of movement of the opening / closing body at any position in the window frame. The purpose is to provide.

As means for achieving the above object, the invention of claim 1 includes an opening / closing body movable within a window frame, an operation member operably attached to the opening / closing body, and attached to the opening / closing body. A portion of the window frame that extends along the moving direction of the opening / closing body is connected to the operating member by a transmission link, and rotates when the operating member is operated. The window opening / closing assist mechanism is provided with an action member that pushes in the opposite direction.

  The invention according to claim 2 is characterized in that the operation member and the action member are connected via a clutch member that is disconnected when the operation member is operated to a predetermined amount or more. The window opening / closing assist mechanism according to item 1 is adopted.

  According to a third aspect of the present invention, the action member is connected to the operation member, and is provided to be attached to the opening / closing body so as to be rotatable, and to be rotatable in only one direction on the attachment base. When the operating member is operated in one direction and the mounting base rotates to one side on the opening / closing body, the assist roller comes into contact with the window frame, and the opening / closing 3. The window opening / closing assist mechanism according to claim 1, wherein the window opening / closing assist mechanism is pushed in a direction opposite to a body moving direction.

  According to a fourth aspect of the present invention, a brake roller that is rotatable only in a direction opposite to the rotation direction of the assist roller is provided on the mounting base, and the operating member is moved in the opposite direction while the opening / closing body is moving. 4. The operation according to claim 3, wherein the brake roller is brought into contact with the window frame to brake the opening / closing body by operating and rotating the mounting base to the other side on the opening / closing body. A window opening / closing assist mechanism was adopted.

  According to a fifth aspect of the present invention, a wheel is rotatably attached to the opening / closing body, and the opening / closing body is movable in the window frame by rolling the wheel on the window frame, and the operation When the member is operated, the action member engages and rotates the wheel, and pushes the window frame through the wheel in a direction opposite to the moving direction of the opening / closing body. The window opening / closing assist mechanism according to claim 1.

<Invention of Claim 1>
It is connected with the operation member by the transmission link, and is rotated by the operation member being operated. By providing an action member that moves, the action member can push the window frame in the direction opposite to the movement direction of the opening / closing body, regardless of the position of the opening / closing body in the window frame. It is possible to assist the operation at the start.

<Invention of Claim 2>
When the operating member and the action member are connected via a clutch member that is disconnected when the operation member is operated to a certain amount or more, the operation member and the action member are The contact with the window frame is released, and the movement of the opening / closing body is not hindered.

<Invention of Claim 3>
The action member includes an attachment base that is connected to the operation member and is rotatably attached to the opening / closing body, and an assist roller that is provided on the attachment base so as to be rotatable only in one direction. Operated in one direction, the mounting base rotates to one side on the opening / closing body, so that the assist roller contacts the window frame and pushes in the direction opposite to the moving direction of the opening / closing body. Thus, when the action member comes into contact with the window frame, the assist roller becomes a buffer member, so that the impact on the operator can be reduced and damage to the window frame can be reduced. Moreover, even if the action member remains in contact with the window frame once the opening / closing body starts moving, the movement of the opening / closing body is not hindered by the rotation of the assist roller in one direction.

<Invention of Claim 4>
A brake roller that can rotate only in the direction opposite to the rotation direction of the assist roller is provided on the mounting base, and the operating base is operated on the opening / closing body by operating the operating member in the opposite direction while the opening / closing body is moving. By rotating to the other side, the brake roller abuts against the window frame and brakes the opening / closing body, thereby controlling the stop of the opening / closing body in addition to assisting the operation at the start of movement of the opening / closing body. be able to.

<Invention of Claim 5>
When the operation member is operated, the action member engages and rotates the wheel, and the window frame is pushed through the wheel in a direction opposite to the moving direction of the opening / closing body, thereby further It can move smoothly.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a residential window 1 has a pair of shojis 3 and 4 (corresponding to the opening / closing body of the present invention) in a window frame 2, a closed position (state in FIG. 1) and an open position. It is attached to be movable in the left-right direction. The window frame 2 is formed in a rectangular shape by connecting an upper frame 2a, a lower frame 2b, and horizontal frames 2c, 2d to each other. The shojis 3 and 4 have upper ends engaged with a pair of grooves formed on the upper frame 2a, and a pair of rails formed on the lower frame 2b engage with a door wheel provided at the lower end, thereby It is attached in a pull-down manner (in this embodiment, grooves, rails and doors are not shown).

  In the shojis 3 and 4, glass plates 32 and 42 are fitted in rectangular shoji frames 31 and 41, respectively. A handle 34 is fixed to the shoji frame 31 of the shoji 3 via an attachment plate 33. By grasping the handle 34, the shoji 3 can be moved to the left and right to perform an opening / closing operation.

  A window opening / closing assist mechanism 5 is attached to the surface of the shoji frame 41 of the shoji 4. The rotation handle 51 of the assist mechanism 5 corresponds to the operation member of the present invention, is attached to a bracket 52 fixed to the shoji frame 41, and is positioned at the center in the vertical direction of the shoji frame 41. The rotation handle 51 is attached to the bracket 52 so that the rotation handle 51 can be operated around the rotation pin 51a. The bracket 52 is provided with a pair of restricting rods 52a and 52b so as to sandwich the rotating handle 51, and the operated rotating handle 51 comes into contact with them to limit the rotation range within a predetermined angle. ing.

  Further, as shown in FIG. 2, a connecting lever 53 is attached to the bracket 52 so as to be rotatable about a pivot shaft 53a. The connecting lever 53 has a substantially L shape, and an engaging protrusion 53b protrudes from one end thereof. A clutch member 54 is fixed to the central portion of the rotation handle 51. The clutch member 54 includes a clutch housing 54a fixed to the rotating handle 51, a plunger 54b slidably accommodated in the clutch housing 54a, and a plunger spring 54c that urges the plunger 54b downward in the drawing. It is configured. The plunger 54b has a recess 54b1 formed at the tip thereof, and is always urged downward by a plunger spring 54c to engage with the engaging protrusion 53b of the connecting lever 53. A tapered surface 54b2 is formed on the outer peripheral surface of the distal end portion of the plunger 54b.

  On the other hand, a transmission link 55 is connected to the other end of the connecting lever 53. The transmission link 55 is formed in a long shape, and a connection pin 53c attached to the end of the connection lever 53 passes through a long hole 55a formed in the upper end portion thereof. The transmission link 55 extends in the vertical direction to the lower part of the shoji 4 and has a guide member 56 (shown in FIG. 1) provided on the side and another guide member (not shown) provided on the opposite side. Therefore, it is regulated not to incline.

  The transmission link 55 is connected at its lower end to a rotating plate 57 (corresponding to the mounting base of the present invention and corresponding to the working member of the present invention together with the assist roller 59 and the brake roller 60 described later). The rotation plate 57 is attached to a rotation board 58 fixed to the shoji frame 41 so as to be rotatable about a swing shaft 57a. Further, a pin slot 57b is provided at a substantially central portion of the rotation plate 57, and a guide pin 58a protruding from the rotation substrate 58 is engaged with the pin slot 57b, and moves relatively within the pin slot 57b. The rotation of the rotation plate 57 is restricted. A connecting rod 57 c is attached to the upper end of the rotating plate 57, and is inserted into a long hole 55 b formed in the lower end of the transmission link 55 so that both are connected.

  An assist roller 59 and a brake roller 60 are rotatably attached to the lower end of the rotation plate 57, respectively. The assist roller 59 and the brake roller 60 are formed of a non-slip material such as urethane or rubber, and ratchets 59a and 60a are provided on the same axis. In addition, gear teeth are formed in opposite directions on the outer peripheral surfaces of the ratchets 59a and 60a.

  The poles 59b and 60b are rotatably provided on the rotation plate 57, and are urged to engage with the gear teeth of the ratchets 59a and 60a by springs (not shown). The poles 59b and 60b may be pressed onto the ratchets 59a and 60a only by their own weights so as to be engaged therewith. With the above-described configuration, the assist roller 59 rotates only counterclockwise in FIG. 2, and the brake roller 60 can rotate only clockwise. As shown in FIG. 2, the assist roller 59 and the brake roller 60 are separated from the lower frame 2 b of the window frame 2 by a predetermined distance when the rotation handle 51 is not operated. is there.

  Next, based on FIG. 3 thru | or FIG. 6, the operating method of the assist mechanism 5 is demonstrated. In order to move the shoji 4 toward the open position, as shown in FIG. 3, the turning handle 51 is turned counterclockwise around the turning pin 51a. By operating the rotating handle 51, the connecting lever 53 engaged with the plunger 54b of the clutch member 54 also rotates in the same direction around the pivot shaft 53a, so that the transmission link 55 connected thereto is provided. , Pulled upwards. Since the transmission link 55 is regulated by the guide member 56 and the like, the transmission link 55 rises straight, and the elongated hole 55a formed in the transmission link 55 absorbs the difference from the rotation trajectory of the connection pin 53c of the connection lever 53. .

  As the transmission link 55 moves upward, the rotation plate 57 connected to the lower end of the transmission link 55 also rotates counterclockwise about the swing shaft 57a. Also in the rotation plate 57, the long hole 55 b absorbs the difference between the rotation locus of the swing shaft 57 a of the rotation plate 57 and the movement locus of the end portion of the transmission link 55. By the rotation of the rotation plate 57, the assist roller 59 at the lower end of the rotation plate 57 is lowered and comes into contact with and presses the lower frame 2b of the window frame 2, so that the shoji 4 is slightly lifted. Even after the assist roller 59 comes into contact with the lower frame 2b, when the rotation plate 57 rotates, the lower frame 2b in which the assist roller 59 extends along the moving direction of the shoji 4 is shown on the right side in FIG. The shoji 4 to which the assist mechanism 5 is attached receives a reaction force from the lower frame 2b and starts moving to the left (opening direction). To do. Since the assist roller 59 can be rotated only counterclockwise, there is no problem without rotating when the lower frame 2b is pushed rightward.

  As described above, when the shoji 4 is moved in the opening direction against the adhering force to the sealing material provided on the window frame 2, the assist mechanism 5 functions to rotate the shoji 4 instead of pulling the shoji 4. It is only necessary to rotate the handle 51, and the shoji 4 can be easily moved in combination with the assisting force resulting from the lever ratio.

  When the turning amount of the turning handle 51 becomes a certain amount or more, the turning radius of the clutch member 54 and the turning radius of the engaging protrusion 53b of the connecting lever 53 are different, and therefore the engagement between the both is caused. Is released (shown in FIG. 4). As a result, the restraint of the connecting lever 53 is released, so that the lifted shoji 4 is lowered, whereby the rotating plate 57 rotates clockwise and returns to the initial position, and the transmission link connected thereto. 55 also returns to the initial position together with the connecting lever 53. Thereby, the contact between the assist roller 59 and the lower frame 2b is released.

  As shown in FIG. 5, when the pivot handle 51 is rotated clockwise while the shoji 4 is moving toward the open position, the engagement protrusion 53 b of the coupling lever 53 is disengaged. It rides on the taper surface 54b2 of the clutch member 54, bends the plunger spring 54c, and re-engages with the recess 54b1 of the plunger 54. Thereafter, the connecting lever 53 rotates clockwise together with the rotating handle 51 and pushes down the transmission link 55 downward.

  The lowering of the transmission link 55 causes the rotation plate 57 to rotate clockwise about the swing shaft 57a. As the rotating plate 57 rotates, the brake roller 60 at the lower end thereof descends and comes into contact with the lower frame 2 b of the window frame 2, thereby generating a braking force for the movement of the shoji 4. Since the brake roller 60 can rotate only in the clockwise direction, there is no problem in generating a braking force on the shoji 4.

  When the rotation amount of the rotation handle 51 becomes a certain amount or more, the engagement between the plunger 54b of the clutch member 54 and the connecting lever 53 is released as shown above (shown in FIG. 6). As a result, the restraint of the connecting lever 53 is released, so that the brake roller 60 receives the reaction force from the lower frame 2b and returns to the initial position. Return to position.

  According to the present embodiment, the lower frame that is connected to the rotation handle 51 and is activated by the operation of the rotation handle 51 and extends along the moving direction of the shoji 4 in the window frame 2. 2b is provided with a rotating plate 57 that pushes the shoji 4 in the direction opposite to the moving direction of the shoji 4, so that the assist roller 59 pushes the shovel 2 in the window frame 2 regardless of the position of the shoji 4 in the window frame 2. 4 can be pushed in the direction opposite to the moving direction of 4, and the operation can be assisted at the start of the movement.

  Further, the pivot handle 51 and the pivot plate 57 are connected via a clutch member 54 that is disconnected when the pivot handle 51 is operated to a predetermined amount or more, so that the shoji 4 moves. After starting, the contact between the assist roller 59 and the window frame 2 is released, and the movement of the shoji 4 is not hindered.

  The rotation plate 57 is connected to the rotation handle 51 and is attached to the shoji 4 so as to be rotatable. An assist roller 59 that can be rotated only in one direction is attached to the rotation plate 57. The assist roller 59 abuts against the window frame 2 and is pushed in a direction opposite to the moving direction of the shoji 4 when the turning plate 57 is turned to one side on the shoji 4 by being operated in the direction. Thus, when the assist roller 59 comes into contact with the window frame 2, it becomes a buffer member, so that the impact on the operator can be reduced and damage to the window frame 2 can be reduced. Moreover, even if the assist roller 59 remains in contact with the window frame 2 once the shoji 4 starts to move, the shoji 4 does not hinder the movement of the shoji 4 by rotating in one direction.

  A brake roller 60 that can rotate only in a direction opposite to the rotation direction of the assist roller 59 is provided on the rotation plate 57, and the rotation handle 51 is operated in the opposite direction while the shoji 4 is moving. By rotating the rotation plate 57 to the other side on the shoji 4, the brake roller 60 comes into contact with the window frame 2 to brake the shoji 4, so that the operation at the start of the movement of the shoji 4 is performed. In addition to the assistance, the stopping of the shoji 4 can also be controlled. In the window opening / closing assist mechanism 5 according to the present embodiment, when the shoji 4 is moved from the open position to the closed position, the roles of the assist roller 59 and the brake roller 60 are switched.

<Modification 1>
FIG. 7 shows a first modification of the assist mechanism 5 according to the first embodiment. The turning handle 61 according to this modification is substantially L-shaped and can be turned around a turning pin 61a. A clutch member 54 similar to that according to the first embodiment is attached to the end portion of the rotation handle 61 on the transmission link 62 side, and the upper end portion of the transmission link 62 engages with a connecting rib 62a that projects forward. It is possible. Other configurations are the same as those in the first embodiment, and thus description thereof is omitted.

  In the state shown in FIG. 7, when the rotation handle 61 is rotated clockwise or counterclockwise, the plunger 54 b of the clutch member 54 is engaged with the connecting rib 62 a of the transmission link 62, and the transmission link 62 is moved. Pull up or push down. As in the first embodiment, the engagement between the clutch member 54 and the connecting rib 62a is released when the rotation amount of the rotation handle 61 exceeds a certain amount.

<Modification 2>
FIG. 8 shows a second modification of the rollers 59 and 60 according to the first embodiment described above. In this modification, a pair of pinion gears 63 and 64 are provided instead of the rollers 59 and 60. Ratchet teeth 63a, 64a are formed on the outer peripheral surfaces of pinion gears 63, 64 rotatably attached to the lower end of the rotating plate 57 so as to face in opposite directions. The same poles 59b and 60b as those according to the first embodiment are engaged with each other while being urged by springs (not shown), so that the pinion gear 63 rotates only counterclockwise in FIG. The pinion gear 64 is rotatable only in the clockwise direction. On the other hand, the lower frame 2b1 of the window frame 2 is a rack in which chevron teeth that can mesh with the pinion gears 63 and 64 are formed over the entire length thereof. Each is pushed right and left. Other configurations are the same as those in the first embodiment, and thus description thereof is omitted. With the configuration described above, the pinion gears 63 and 64 can push the lower frame 2b1 more reliably.

<Embodiment 2>
Based on FIG. 9 thru | or FIG. 11, the assist mechanism 7 by Embodiment 2 is demonstrated. A rotation handle 71 of the assist mechanism 7 is attached to a bracket 72 fixed to the shoji frame 41 so as to be rotatable about a rotation pin 71a. It is biased to be in the position (state shown in FIG. 9). The rotation handle 71 has a substantially L shape, and the end portion on the transmission link 73 side is housed inside the shoji 41. The shoji frame 41 is provided with a pair of restricting rods 41a and 41b so as to sandwich the rotation handle 71. When the rotation handle 71 is operated and brought into contact with the rotation handle 71, the rotation range is limited to a predetermined angle. Has been.

  A transmission link 73 is connected to the right end of the rotation handle 71. A connecting pin 71 b attached to the rotating handle 71 passes through an elongated hole 73 a formed in the upper end portion of the transmission link 73. The transmission link 73 extends in the vertical direction to the lower part of the shoji 4 and is connected to the assist rod 74 and the brake rod 75 (both correspond to the action member of the present invention) at the lower end thereof. The assist rod 74 and the brake rod 75 are rotatably attached to the back surface and the front surface of the transmission link 73, respectively, and are connected to the other ends of tension springs 76 and 77 whose one ends are fixed to the shoji frame 41, respectively. As a result, both are drawn to the left in FIG. 9 and are in contact with the stopper pin 41 c on the shoji frame 41.

  As shown in FIG. 9, the assist rod 74 extends in the vertical direction, and a pawl 74 a that meshes with an assist gear 44 to be described later protrudes at a tip portion thereof. The left end surface of the assist rod 74 has a flat upper surface and a recess 74b in the lower half. On the other hand, the brake rod 75 also extends in the vertical direction and is shorter than the assist rod 74. A pawl 75a that meshes with a brake gear 45, which will be described later, protrudes from the tip of the brake rod 75. The left end surface of the brake rod 75 has a flat bottom surface and a recess 75b formed in the upper half. Yes.

  A door wheel 43 of the shoji 4 (corresponding to a wheel of the present invention together with an assist gear 44 and a brake gear 45 described later) is rotatably attached to the shoji 4 and can roll on the window rail 21 of the window frame 2. Is engaged. As the door wheel 43 rolls on the window rail 21, the shoji 4 can move within the window frame 2. An assist gear 44 and a brake gear 45 are coaxially attached to both surfaces of the door wheel 43. Gear teeth provided on the outer peripheral surfaces of the assist gear 44 and the brake gear 45 are formed to face in opposite directions.

  Next, an operation method of the assist mechanism 7 will be described based on FIGS. 10 and 11. In order to move the shoji 4 toward the open position, as shown in FIG. 10, the turning handle 71 is turned counterclockwise around the turning pin 71a. By operating the rotation handle 71, the transmission link 73 is pulled upward and rises together with the rods 74 and 75.

  As the assist rod 74 moves, the recess 74b abuts against the stopper pin 41c, so that the tip end rotates to the left under the pulling force from the tension spring 76, and the pawl 74a meshes with the assist gear 44. To do. Since the assist rod 74 is further raised while being engaged with the assist gear 44, the door wheel 43 is rotated counterclockwise in FIG. 10 together with the assist gear 44 (in other words, the window frame 2 is moved through the door wheel 43 to the obstacle). Thus, the shoji 4 starts to move toward the open position. Since the brake rod 75 is formed shorter than the assist rod 74, it only rises together with the transmission link 73 at this time, does not engage with the brake gear 45, and does not interfere with the rotation of the door wheel 43.

  As shown in FIG. 11, when the shoji 4 is moving toward the open position, the rotation handle 71 is rotated in the clockwise direction, and the transmission link 73 is pushed down, the rods 74 and 75 are also moved downward. Moving. Due to the movement of the brake rod 75, the recess 75 b abuts against the stopper pin 41 c, so that the leading end rotates to the left under the pulling force from the tension spring 77, and the pawl 75 a meshes with the brake gear 45. To do. Since the brake rod 75 is further lowered while being engaged with the brake gear 45, the door wheel 43 is rotated together with the brake gear 45 clockwise in FIG. 11, thereby generating a braking force for the movement of the shoji 4. Since the assist rod 74 is formed longer than the brake rod 75, at this time, the assist rod 74 only descends together with the transmission link 73, does not engage with the assist gear 44, and does not interfere with the rotation of the door wheel 43.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) In the first embodiment, a functional component such as a one-way clutch may be interposed between the rotating plate, the assist roller, and the brake roller instead of the combination of the ratchet and the pawl.
(2) In the second embodiment, a torque limiter may be interposed between the door pulley, the assist gear, and the brake gear so as to reduce the impact when the rods and the gears mesh with each other.
(3) If the assist mechanism is embedded in the thickness direction of the shoji frame, the weight balance of the shoji frame can be improved.

It is a front view of the window which attached the window opening / closing assist mechanism by Embodiment 1. FIG. 2 is an overall view of the assist mechanism shown in FIG. 1. It is the front view which showed the place which operated the assist mechanism shown in FIG. 2 in the direction which opens a shoji. FIG. 4 is a front view showing a state where the engagement of the clutch member is released in the assist mechanism shown in FIG. 3. It is the front view which showed the place which applied the brake to the shoji which moves to an open direction. It is the front view which showed the place where the engagement of the clutch member of the assist mechanism shown in FIG. 5 was cancelled | released. It is the front view which showed the rotation handle of the assist mechanism by the modification 1 of Embodiment 1. FIG. It is the front view which showed the lower end part of the assist mechanism by the modification 2 of Embodiment 1. FIG. FIG. 6 is an overall view of an assist mechanism according to a second embodiment. It is the front view which showed the place which operated the assist mechanism shown in FIG. 9 in the direction which opens a shoji. It is the front view which showed the place which applied the brake to the shoji which moves to an open direction.

Explanation of symbols

2 ... Window frame 2b, 2b1 ... Lower frame 3, 4 ... Shoji 5, 7 ... Window opening / closing assist mechanism 43 ... Door wheel 44 ... Assist gear 45 ... Brake gear 51, 61, 71 ... Rotating handle 54 ... Clutch member 57 ... Time Moving plate 59 ... Assist roller 60 ... Brake roller 63, 64 ... Pinion gear 74 ... Assist rod 75 ... Brake rod

Claims (5)

Openable / closable body that can move in the window frame,
An operation member that is operably attached to the opening / closing body, and that is attached to the opening / closing body, is connected to the operation member by a transmission link, and rotates when the operation member is operated, A window opening / closing assist mechanism comprising an action member that pushes a portion extending along the moving direction of the opening / closing body in a direction opposite to the moving direction of the opening / closing body. The window opening / closing assist according to claim 1, wherein the operation member and the action member are coupled via a clutch member that is disconnected when the operation member is operated to a predetermined amount or more. mechanism. The action member includes an attachment base coupled to the operation member and rotatably attached to the opening / closing body, and an assist roller provided on the attachment base so as to be rotatable only in one direction, When the operation member is operated in one direction and the mounting base is rotated to one side on the opening / closing body, the assist roller comes into contact with the window frame and is opposite to the moving direction of the opening / closing body. The window opening / closing assist mechanism according to claim 1 or 2, wherein the window opening / closing assist mechanism is pushed in a direction. A brake roller that can rotate only in a direction opposite to the rotation direction of the assist roller is provided on the mounting base, and the operating member is operated in the opposite direction while the opening / closing body is moving, so that the mounting base is 4. The window opening / closing assist mechanism according to claim 3, wherein the brake roller is brought into contact with the window frame and brakes the opening / closing body by rotating the opening / closing body to the other side. 5. A wheel is rotatably attached to the opening / closing body, and when the wheel rolls on the window frame, the opening / closing body is movable in the window frame, and the operation member is operated. The said action member engages with the said wheel, rotates this, and pushes the said window frame in the direction opposite to the moving direction of the said opening-closing body via the said wheel. Window opening / closing assist mechanism.

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