JP7369447B2 - Sliding door assist device - Google Patents

Description

The present invention relates to a sliding door assist device that moves a door panel near the opening/closing stroke end toward the stroke end.

Regarding assist devices for sliding doors, the present applicant has proposed an assist device disclosed in Patent Document 1. The assist device of Patent Document 1 is configured by housing a cylinder-shaped damper, a slider joined to one end of the damper, a trigger body, a force storage spring, etc. inside a casing that moves together with the runner. . Further, a switching tool for switching the trigger body between a standby position and an operating position is fixed to the guide rail.

In a sliding door that is taken in and out of a door pocket, the opening limit of the door panel is set at a position where the handle is exposed outside the door pocket in order to prevent the handle provided on the door panel from entering the door pocket. In such a sliding door, the width of the opening is reduced by the amount that a portion of the door panel protrudes from the door pocket (hereinafter referred to as "remaining part"). Therefore, when moving or when moving a large chest of drawers or the like to redecorate a room, it is desirable to be able to accommodate the entire door panel within the door pocket to increase the width of the opening when fully opened. In order to meet these demands, Patent Document 2 discloses a movable trigger device that allows the entire door panel to be accommodated in a door pocket when necessary.

The first movable trigger device of Patent Document 2 houses a movable tool and a trigger member inside a rail, and locks a door panel by engaging a protruding member provided on the movable tool with a locking part of the rail. It is designed to be able to stop at the left-over position. The movable device is fixed to the open end of the strip-shaped trigger member, and when necessary, the protruding member is pulled down against the spring force of the biasing member to remove the protruding member from the locking part of the rail. As a result, the entire door panel can be accommodated in the door pocket from the left-behind position. Also, when the door panel is closed from the fully open position inside the door pocket, the trigger member moves to close together with the assist device, and when its closed end comes into contact with the block member fixed inside the rail, the protruding member moves to the rail. It falls into engagement with the locking part of. In the second movable trigger device disclosed in Patent Document 2, one of the surfaces of the distal end of the protruding member and the locking portion of the rail that contact each other is formed as an inclined surface, so that when an external force of a predetermined level or more is applied to the movable tool, the protruding member snaps off. The engagement of the locking portion is released so that the entire door panel can be accommodated in the door pocket from the left-over position.

Japanese Patent Application Publication No. 2018-119390 Japanese Patent Application Publication No. 2017-119956

According to the first movable trigger device of Patent Document 2, after the door panel is stopped at the left-open position, the projecting member is pulled down against the spring force of the biasing member, thereby moving the entire door panel into the door pocket. can be housed within. However, after the door panel is opened to the left position, the user must pull down the protruding member himself against the spring force of the biasing member, which requires extra effort. Furthermore, if one side of the door pocket does not open toward the interior, there is also the disadvantage that the protruding member cannot be pulled down.

In this regard, in the case of the second movable trigger device of Patent Document 2, which releases the engagement between the protruding member and the locking part by applying an external force of a predetermined amount or more to the movable tool, the effort of pulling down the protruding member is eliminated. In addition, even if one side of the door bag is not open toward the interior, the engagement between the protruding member and the locking part can be released, and the entire door panel can be inserted into the door bag from the remaining position. can be accommodated. However, once the assist device has finished operating the door panel, that is, the door panel has been slowly opened to the left-out position, the door panel must be pushed into the door bag again to engage the protruding member and the locking part. It is time-consuming and troublesome as it is necessary to release the .

SUMMARY OF THE INVENTION An object of the present invention is to provide a sliding door assist device that can easily open a door panel in a left-open position with less effort.

The present invention includes an assist structure between the guide rail 4 and the door panel 1, which moves the door panel 1 being opened toward the left position before the fully open position, and an assist structure that moves the door panel 1 from the left position. The subject matter is an assist device for a sliding door that is equipped with a position holding structure that allows it to move to a fully open position. The assist structure includes a casing 20 that moves together with the door panel 1, a cylinder-shaped damper 21 disposed inside the casing 20, a power storage spring 22, a trigger body 23, and a trigger body 23 in a standby position and an operating position. It is provided with a trigger switching tool 27 for switching operation. The position holding structure includes a slide base 33 that is slidably guided and supported by the guide rail 4, a base block 34 that closes and immovably receives the slide base 33 at a predetermined position, and is arranged on the open end side of the slide base 33. The seesaw arm 35 , the arm engagement hole 36 provided in the guide rail 4 , the biasing spring 54 that swings and biases the seesaw arm 35 toward the arm engagement hole 36 , and the biasing spring 54 that biases the seesaw arm 35 toward the arm engagement hole 36 . The arm switching device 37 is provided with an arm switching tool 37 that is operated to swing against the urging force. The seesaw arm 35 is swingably supported by the slide base 33, and has a position holding position in which the engagement pin 51 provided on the arm 35 engages with the arm engagement hole 36, and a position holding attitude in which the engagement pin 51 engages with the arm. It can be pivoted to a holding release position where it is separated from the matching hole 36. The trigger switching tool 27 is provided on the slide base 33, and the arm switching tool 37 is provided on the open end side of the casing 20 of the assist structure. When the door panel 1 is operated to open toward the left-back position with the assist structure, the engagement pin 51 of the seesaw arm 35 that has been switched to the position holding posture engages with the arm engagement hole 36, and the slide base 33 is held immovable. Then, while the door panel 1 is moving to the open position, the seesaw arm 35 is automatically switched to the holding release position by the arm switching device 37, and the engagement between the engagement pin 51 and the arm engagement hole 36 is interrupted. It is characterized in that it is configured such that it can be released and the door panel 1 can be opened from the left-open position to the fully open position.

A seesaw arm 35 disposed on the open end side of the slide base 33 is supported so as to be swingable around a horizontal support shaft 53, and is urged to swing toward a position holding position by a biasing spring 54. . An engagement pin 51 that engages and disengages from the arm engagement hole 36 is formed at one end of the seesaw arm 35, and a passive portion 52 that is switched by an arm switching tool 37 is provided at the other end of the seesaw arm 35.

The slide base 33 is a first base 41 on the open end side that supports the seesaw arm 35, a second base 42 on the closed end side that is received and held by the base block 34, and a connection that connects both bases 41 and 42. It is composed of a frame 43. A trigger switching device 27 is provided on the lower surface of the first base 41, and an arm bracket 44 that supports the seesaw arm 35 is formed in a bifurcated shape on the open end side of the first base 41. The seesaw arm 35 is swingably supported by horizontal support shafts 53 provided on the pair of arm brackets 44, and is urged to swing toward a position holding posture by biasing springs 54 attached to both ends of the support shafts 53. ing.

The present invention includes an assist structure between the guide rail 4 and the door panel 1, which moves the door panel 1 being opened toward the left position before the fully open position, and an assist structure that moves the door panel 1 from the left position. The subject matter is an assist device for a sliding door that is equipped with a position holding structure that allows it to move to a fully open position. The assist structure includes a casing 20 that moves together with the door panel 1, a cylinder-shaped damper 21 disposed inside the casing 20, a power storage spring 22, a trigger body 23, and a trigger body 23 in a standby position and an operating position. It is provided with a trigger switching tool 27 for switching operation. The position holding structure includes a slide base 33 that is slidably guided and supported by the guide rail 4, a base block 34 that closes and immovably receives the slide base 33 at a predetermined position, and is arranged on the open end side of the base block 34. The seesaw arm 35, the arm engaging claw 56 provided on the closed end side of the slide base 33, the urging spring 54 that swings and urges the seesaw arm 35 in a direction to engage with the arm engaging claw 56, and the seesaw arm The arm switching device 37 is provided to swing the arm 35 against the biasing force of the biasing spring 54. The seesaw arm 35 is swingably supported by the base block 34, and has a position holding position in which the engaging/disengaging claw 57 provided on the arm 35 engages with the arm engaging claw 56, and a position holding posture in which the engaging/disengaging claw 57 engages with the arm. It can be pivoted to a holding release position where it is separated from the mating claws 56. The trigger switching tool 27 is provided on the slide base 33, and the arm switching tool 37 is provided on the closed end side of the casing 20 of the assist structure. When the door panel 1 is operated in the assist structure to open toward the left position, the engaging/disengaging claw 57 of the seesaw arm 35 that has been switched to the position holding posture engages with the arm engaging claw 56, and the sliding base 33 is held immovable. Then, while the door panel 1 is being moved to the open position, the seesaw arm 35 is automatically switched to the holding release position by the arm switching tool 37, and the engagement between the engagement and disengagement claws 57 and the arm engagement claws 56 is interrupted. It is characterized in that it is configured such that it can be released and the door panel 1 can be opened from the left-open position to the fully open position.

A seesaw arm 35 disposed on the open end side of the base block 34 is supported so as to be swingable around a vertical support shaft 53, and is urged to swing toward a position holding position by a biasing spring 54. . An arm switching tool 37 is provided on the closed end side of the casing 20 of the assist structure. A locking/disengaging pawl 57 is formed at one end of the seesaw arm 35, and a passive portion 52 that is switched and operated by an arm switching device 37 is provided at the other end of the seesaw arm 35. The engaging/disengaging claw 57 in the position holding position engages with the arm engaging claw 56 provided on the closed end side of the slide base 33 to restrict movement of the slide base 33 in the opening direction.

Near the end of the assist stroke when the door panel 1 is operated to open toward the remaining position using the assist structure, a buffer structure is provided between the slide base 33 and the runner 5 that temporarily stops the movement of the door panel 1 in the opening direction. is provided in between. The buffer structure includes a buffer body 63 provided on the slide base 33, a swing lever 64 that is horizontally swingably supported by the runner block 13 of the runner 5, and a swing lever 64 that swings toward the standby position. A lever spring 65 is provided. The buffer body 63 is formed with a buffer groove 67 that guides the movement of the driven pin 66 of the swing lever 64, and a return groove 68 that allows the driven pin 66 to pass in the closing direction. The buffer groove 67 is configured in a Z-shape by an entrance guide groove 69, a central guide groove 70, and an exit guide groove 71, and the grooves 69, 70, and 71 are continuous in a step-like manner. When the door panel 1 is opened from the left-open position, the driven pin 66 of the swing lever 64 falls into the center guide groove 70 from the entrance guide groove 69 and engages with the drive pin 66 of the swing lever 64 . The door panel 1 is temporarily stopped by being received and supported by the horizontal receiving wall 70a. By closing and moving the temporarily stopped door panel 1, the driven pin 66 of the swing lever 64 falls into engagement with the exit guide groove 71 from the central guide groove 70, allowing it to pass through the exit guide groove 71 to the open end side. It is. When the door panel 1 in the fully open position is operated to close, the driven pin 66 of the swing lever 64 falls into engagement with the return groove 68 into the entrance guide groove 69 and can pass through the buffer body 63.

A runner 5 provided on a door panel 1 is guided and supported by a guide rail 4 so as to be freely openable and closable. Inside the auxiliary rail 12 provided between the movement area of the runner 5 and the upper wall of the guide rail 4, a strip-shaped slide base 33, a base block 34, and a seesaw arm 35 are arranged. The seesaw arm 35 is switched by an arm switching tool 37 provided on the assist structure or the runner 5.

The base block 34 is fixed at a position that is biased toward the closed end of the guide rail 4 from the closed end of the door panel 1 in the remaining position. The closed end of the slide base 33 received and held by the base block 34 protrudes from the closed end of the door panel 1.

The sliding door assist device according to the present invention includes an assist structure between the guide rail 4 and the door panel 1 that moves the door panel 1 toward the left-open position, and a structure that moves the door panel 1 from the left-open position to the fully open position. A position holding structure has been placed to make it possible. The position holding structure includes a slide base 33 that is guided and supported by the guide rail 4, a base block 34 that receives the slide base 33 at a predetermined position, a seesaw arm 35, an arm engagement hole 36, and a swinging mechanism for the seesaw arm 35. A biasing spring 54 for biasing and an arm switching tool 37 for swinging the seesaw arm 35 are provided.

According to the assist device having the position holding structure as described above, when the door panel 1 is opened with the assist structure toward the leaving position, the slide base 33 is closed and immovably received by the base block 34. It will be done. Further, the engagement/disengagement pin 51 of the seesaw arm 35 which has been switched to the position holding posture engages with the arm engagement hole 36, and the slide base 33 is held so that it cannot be opened and moved. However, when the door panel 1 is operated to open to the left position using the assist structure, the seesaw arm 35 is automatically switched to the holding release position by the arm switching tool 37 that moves together with the door panel 1, and the engagement pin 51 The engagement of the arm engagement hole 36 is released. As a result, the slide base 33 can be moved in the opening direction, and the door panel 1 can be opened from the left-open position to the fully open position.

As described above, according to the assist device of the present invention, the seesaw arm 35 of the position holding structure is changed from the holding position to the holding release position by utilizing the movement of the door panel 1 being opened and moved to the leaving position by the assist structure. Since the switching is automatic, it is only necessary to manually push the door panel 1 to the fully open position following the opening movement of the door panel 1 by the assist structure. To easily perform an opening operation of a door panel 1 at a certain position with less effort. In addition, when the seesaw arm 35 of the position holding structure is switched to the holding release position, the door panel 1 can be stored in the fully open position by simply pushing the door panel 1 lightly, so a large external force is applied to the door panel 1 to engage it. Compared to conventional assist devices that require release of the state, the opening operation of the door panel 1 from the left-back position to the fully open position can be easily performed. Further, when the door panel 1 is opened to the left-open position, the assist device is in a standby state and does not interfere with the opening/closing movement of the door panel 1, so that it is opened to the fully open position and placed inside the door pocket 3. The operation of pulling out the door panel 1 in the stored state can be easily performed.

A seesaw arm 35 disposed on a slide base 33 is swingably supported by a horizontal support shaft 53, and is urged to swing toward a position holding posture by a biasing spring 54. In addition, the seesaw arm 35 is provided with an engaging/disengaging pin 51 that engages and disengages from the arm engaging hole 36 and a passive part 52 that is switched and operated by the arm switching device 37, so that the door panel 1 can be opened with an assist structure until it reaches the left position. At this time, the arm switching tool 37 comes into contact with the passive part 52 to switch the seesaw arm 35 from the position holding position to the holding release position. According to such an assist device, the components of the position holding structure such as the slide base 33, the base block 34, the seesaw arm 35, and the biasing spring 54 can be moved in the space between the moving area of the assist structure and the upper wall of the guide rail 4. Since the position holding structure can be added without changing the existing assist structure and the structure of the guide rail 4, the overall cost of the assist device having the position holding function can be reduced. Furthermore, even if the door panel 1 is opened rapidly with a large force, the seesaw arm 35 can be reliably switched from the position holding position to the holding release position using the arm switching device 37, so that external force is not concentrated on the seesaw arm 35. This can reliably prevent damage.

The slide base 33 is composed of a first base 41 that supports the seesaw arm 35, a second base 42 that is received by the base block 34, and a connecting frame 43 that connects both bases 41 and 42. A trigger switching tool 27 is provided on the bottom surface. According to such a position holding structure, the structure of the elongated slide base 33 can be prevented from becoming unnecessarily complicated, and the cost of the slide base 33, which is a main component of the position holding structure, can be reduced. Further, the seesaw arm 35 is swingably supported by a horizontal support shaft 53 provided on the arm bracket 44 of the first base 41, and the arm 35 is held in a position with biasing springs 54 attached to both ends of the support shaft 53. Since the swinging force is applied toward , the seesaw arm 35 can be reliably engaged and disengaged from the arm engagement hole 36, and the reliability of the switching operation of the position holding structure can be improved.

In another sliding door assist device according to the present invention, the position holding structure includes a slide base 33 that is guided and supported by the guide rail 4, a base block 34 that receives the slide base 33 at a predetermined position, and a seesaw arm 35. It is provided with an arm engaging claw 56 and an arm switching tool 37 for switching the seesaw arm 35 between a position holding position and a holding release position.

According to the assist device having the position holding structure as described above, when the door panel 1 is opened with the assist structure toward the leaving position, the slide base 33 is closed and immovably received by the base block 34. It will be done. Further, the engaging/disengaging claw 57 of the seesaw arm 35 that has been switched to the position holding posture engages with the arm engaging claw 56, and the slide base 33 is held so that it cannot be opened and moved. However, when the door panel 1 is opened to the left position using the assist structure, the seesaw arm 35 is automatically switched to the holding release position by the arm switching tool 37 that moves together with the door panel 1, and the locking/disengaging claw 57 The engagement of the arm engaging claw 56 is released. As a result, the slide base 33 can be moved in the opening direction, and the door panel 1 can be opened from the left-open position to the fully open position.

As described above, according to another assist device of the present invention, the see-saw arm 35 of the position holding structure is released from the position holding posture by utilizing the movement of the door panel 1 being opened and moved to the leaving position by the assist structure. Since the position is automatically switched to the position, it is only necessary to manually push the door panel 1 to the fully open position following the opening movement of the door panel 1 by the assist structure, compared to conventional assist devices of this type. To easily perform an opening operation of a door panel 1 at a left-back position with less effort. In addition, when the seesaw arm 35 of the position holding structure is switched to the holding release position, the door panel 1 can be stored in the fully open position by simply pushing the door panel 1 lightly, so a large external force is applied to the door panel 1 to engage it. Compared to conventional assist devices that require release of the state, the opening operation of the door panel 1 from the left-back position to the fully open position can be easily performed. Further, when the door panel 1 is opened to the left-open position, the assist device is in a standby state and does not interfere with the opening/closing movement of the door panel 1, so that it is opened to the fully open position and placed inside the door pocket 3. The operation of pulling out the door panel 1 in the stored state can be easily performed.

A seesaw arm 35 disposed on a base block 34 is swingably supported by a vertical support shaft 53, and is urged to swing toward a position holding posture by a biasing spring 54. In addition, the seesaw arm 35 is provided with an engaging/disengaging claw 57 that engages with the arm engaging claw 56 and a passive part 52 that is switched and operated by the arm switching tool 37, so that the door panel 1 can be opened to the left-back position with an assist structure. At this time, the arm switching tool 37 comes into contact with the passive part 52 to switch the seesaw arm 35 from the position holding position to the holding release position. According to such an assist structure, components of the position holding structure such as the slide base 33, base block 34, seesaw arm 35, and biasing spring 54 can be held in a space between the moving area of the assist structure and the upper wall of the guide rail 4. Since the position holding structure can be added without changing the existing assist structure and the structure of the guide rail 4, the overall cost of the assist device having the position holding function can be reduced. Furthermore, even if the door panel 1 is opened rapidly with a large force, the seesaw arm 35 can be reliably switched from the position holding position to the holding release position using the arm switching device 37, so that external force is not concentrated on the seesaw arm 35. This can reliably prevent damage.

A buffer structure is provided near the end of an assist stroke when the door panel 1 is operated to open toward a left-open position by an assist device, so that the movement of the door panel 1 in the opening direction can be temporarily stopped. The buffer structure includes a buffer body 63 provided on the slide base 33, a swing lever 64 that is horizontally swingably supported by the runner block 13, and a lever spring that urges the swing lever 64 to swing toward the standby position. It was composed of 65 pieces. Further, the buffer body 63 is provided with a buffer groove 67 that guides the movement of the driven pin 66 of the swing lever 64, and the groove 67 is formed into a Z-shape by an entrance guide groove 69, a central guide groove 70, and an exit guide groove 71. The grooves 69, 70, and 71 are made to be continuous in a stepwise manner.

As described above, according to the assist device equipped with the buffer structure, when the door panel 1 is operated to open from the remaining position, the driven pin 66 of the swing lever 64 falls from the entrance guide groove 69 to the central guide groove 70. In addition, the driven pin 66 of the swing lever 64 is received and supported by the horizontal receiving wall 70a of the central guide groove 70, so that the door panel 1 can be temporarily stopped. In other words, the movement of the door panel 1 in the opening direction is temporarily stopped by the buffer structure near the end of the opening assist stroke, and the door panel 1 is opened all at once from the end of the opening assist stroke to the fully open position. can be prevented. Therefore, when the door panel 1 is fully opened from the left-back position, the fingertips placed on the handle 10 are prevented from being caught between the opening edges of the door panel 1 and the door bag 3, or between the door panels 1 adjacent in the thickness direction. can improve safety. Furthermore, by closing and moving the temporarily stopped door panel 1, the driven pin 66 of the swing lever 64 is caused to fall into engagement with the exit guide groove 71 from the central guide groove 70, and the exit guide groove 71 is moved toward the open end side. It is possible to pass through. Furthermore, since the buffer body 63 is provided with a return groove 68 that allows the driven pin 66 to pass in the closing direction, when the door panel 1 is moved from the fully open position to the closed position, the driven pin 66 is guided by the return groove 68. The door panel 1 can pass through the buffer structure without any trouble, and the closing operation of the door panel 1 from the fully open position can be performed easily and simply.

A slide base 33, a base block 34, and a seesaw arm 35 are arranged inside the auxiliary rail 12 provided between the movement area of the runner 5 and the upper wall of the guide rail 4, and the assist structure or the arm provided on the runner 5 is The seesaw arm 35 can be switched by a switching tool 37. According to such an assist device, components of the position holding structure, such as the slide base 33, the base block 34, and the seesaw arm 35, excluding the arm switching tool 37, can be housed inside the auxiliary rail 12 and protected. Further, since the slide base 33 is slid and guided by the auxiliary rail 12, the slide base 33 is prevented from meandering and can be opened and closed correctly in synchronization with the runner 5 and the assist structure.

The base block 34 is fixed at a position biased towards the closed end of the guide rail 4 from the closed end of the door panel 1 in the left-behind position, and the closed end of the slide base 33 received and held by the base block 34 is moved toward the closed end of the door panel 1. It was made to protrude from the closed end of 1. According to such an assist device, by separating the base block 34 from the guide rail 4, the slide base 33 and the assist device can be removed from the guide rail 4 in an integrated state. Therefore, maintenance of the biasing spring 54 can be easily performed.

FIG. 2 is an operation explanatory diagram showing the operation status of the sliding door assist device of the present invention according to the first embodiment. It is a front view of a sliding door provided with an assist device. FIG. 3 is a longitudinal sectional front view of the assist device. FIG. 3 is an exploded front view of the assist device. It is a perspective view of a slide base and a guide rail. FIG. 3 is a longitudinal sectional front view of the slide base and the guide rail. FIG. 3 is a longitudinal sectional front view of the seesaw arm in a state of being switched to a position holding posture. FIG. 6 is a longitudinal sectional front view of the seesaw arm in a state of being switched to a holding release position. 8 is a sectional view taken along line AA in FIG. 7. FIG. FIG. 3 is an exploded perspective view showing a sliding door assist device of the present invention according to a second embodiment. FIG. 3 is a longitudinal sectional front view of the assist device. FIG. 3 is a cross-sectional plan view of the seesaw arm in a state of being switched to a position holding posture. FIG. 3 is an operation explanatory diagram showing the operation status of the seesaw arm. FIG. 7 is a longitudinal sectional front view showing a sliding door assist device of the present invention according to a third embodiment. FIG. 6 is a front view showing the swing lever of the buffer structure. FIG. 3 is a plan view showing the swing lever of the buffer structure. It is an operation|movement explanatory diagram which shows the operating condition of a buffer structure. FIG. 7 is a longitudinal sectional front view showing the sliding door assist device of the present invention according to Example 4, and shows another embodiment of the seesaw arm.

(Example 1) Example 1 of the sliding door assist device according to the present invention is shown in FIGS. 1 to 9. In this embodiment, front and back, left and right, and up and down follow the intersecting arrows shown in FIG. 2 and the notation of front and back, left and right, and up and down in the vicinity of each arrow. The sliding door shown in FIG. 2 opens and closes the entrance of a walk-in closet or a storage room facing the room with a single door panel 1, and a door pocket 3 is provided on the right side of the opening frame 2. There is.

In FIG. 2, a guide rail 4 for guiding the opening and closing of the door panel 1 is fixed to the upper part of the opening frame 2. Inside the guide rail 4, there is a pair of left and right runners 5 that support the door panel 1, an assist structure, and a position. It houses the holding structure. The runner 5 is connected to a runner stand 7 via a vertical runner shaft 6, and the runner stand 7 is mounted on the upper corner of the door panel 1. In order to prevent the door panel 1 from wobbling back and forth during opening and closing, a slide groove 8 is provided on the lower surface of the door panel 1, and the groove 8 is guided by a guide roller 9 fixed to the floor surface. In FIG. 2, reference numeral 10 is a handle formed in a recess in the door panel 1.

As shown in FIGS. 5 and 9, the guide rail 4 is made of an aluminum strip having a C-shaped cross section and opening downward. A rail wall 4a for guiding the runner 5 is formed protruding from the front and back of the lower end, and an upper wall An auxiliary rail 12 is provided on the inner surface. As shown in FIG. 3, the runner 5 includes a runner block 13 that is long in the left and right directions, four rollers 14 arranged on the left and right sides of the front and rear surfaces of the block 13, a roller shaft 15, and the like. A connecting seat 16 for connecting the assist structure is protruded from the upper part of one side (open end side) of the runner block 13. The runner 5 suspends the closed end side and the open end side of the door panel 1, and a casing 20 of an assist structure is connected to the connecting seat 16 of the runner 5 on the closed end side by bolts 17.

In FIG. 4, the assist structure includes a casing 20 that opens upward, a cylinder-shaped damper 21 disposed inside the casing 20, two force storage springs 22, two trigger bodies 23, and one end of the damper 21. and a pair of sliders 24 joined to the other end, two guide shafts 25 for slidingly guiding each slider 24, and trigger switching tools 26 and 27 for switching the trigger body 23 between the standby position and the operating position (Fig. 6 ), etc., and assists in the closing and opening operations of the door panel 1. End blocks 28 and 29 are fixed to both ends of the casing 20, respectively, and a force storage spring 22 made of a compression spring is arranged between the blocks 28 and 29 and each slider 24. Reference numeral 30 denotes a shaft block that supports adjacent ends of the two guide shafts 25, and is fixed at the center inside the casing 20. The assist structure is such that when the door panel 1 is closed, the door panel 1 is slowly closed from near the closed end to the closed position, and when the door panel 1 is opened, the door panel 1 is moved from near the open end to the door bag 3. Operate to move toward the outside left-behind position.

After the door panel 1 is moved toward the left-left position using the assist structure, a position holding structure is provided inside the guide rail 4 in order to enable the door panel 1 to be moved from the left-left position to the fully open position. There is. As shown in FIG. 5, the position holding structure includes a slide base 33 that is slidably guided and supported by the auxiliary rail 12 of the guide rail 4, a base block 34 that closes the slide base 33 at a predetermined position and receives it immovably, and a slide The seesaw arm 35 is supported by the base 33 so as to be swingable, the arm engagement hole 36 through which the seesaw arm 35 engages and disengages, and the seesaw arm 35 moves together with the door panel 1 to set the position holding position and the holding release position. An arm switching tool 37 (see FIG. 8) for switching operation is provided. The arm engagement hole 36 is a through hole formed in the upper wall of the guide rail 4. The arm switching tool 37 is provided on the open end side of the casing 20, and in this embodiment, the arm switching tool 37 is formed as a bulge on the upper surface of an end block 29 fixed to the open end of the casing 20. The arm switching tool 37 and the trigger switching tool 27 are provided so as to be shifted back and forth to avoid interference with each other (see FIG. 9).

As shown in FIG. 5, the slide base 33 connects a first base 41 that supports the seesaw arm 35, a second base 42 on the closed end side that is received and held by the base block 34, and these two bases 41 and 42. The connecting frame 43 is made of a metal plate. The first base 41 is made of a strip-shaped plastic molded product, and has a trigger switching tool 27 provided on its lower surface, and a forked arm bracket 44 that supports the seesaw arm 35 on the open end side of the base 41. ing. Furthermore, slide pieces 45 are provided protruding from three locations on the front and rear surfaces of the first base 41 to be guided and supported by the rail grooves 12a of the auxiliary rail 12. The second base 42 is made of a rectangular plastic molded product, and has slide pieces 46 projecting from its front and rear surfaces that are guided and supported by the rail grooves 12a. A connecting seat 47 is provided on each of the first base 41 and the second base 42, and by fastening both ends of the connecting frame 43 to these connecting seats 47 with rivets 48, both bases 41 and 42 and the connecting frame 43 are connected. are integrated to form the slide base 33.

The base block 34 is made of a rectangular plastic molded product, and is placed at a position biased toward the closed end of the guide rail 4 from the closed end of the door panel 1 in the left-open position, and is attached to the upper wall of the guide rail 4 with screws 38. is fixed. Therefore, when the slide base 33 is received by the base block 34, the closed end of the slide base 33 protrudes from the closed end of the door panel 1. According to such a slide base 33, the slide base 33 can be removed from between the casing 20 and the guide rail 4 by loosening the screws 38 and separating the base block 34 from the guide rail 4. Maintenance of the biasing spring 54 (described later) can be easily performed. More specifically, when the base block 34 is separated from the guide rail 4 with the position holding structure switched to the holding release position, the slide base 33 and the assist device are pulled out from the guide rail 4 while they are integrated. It can be removed.

The seesaw arm 35 is made of a plastic molded product, and an engagement pin 51 that engages and disengages from the arm engagement hole 36 of the guide rail 4 is provided on the upper surface of the right arm, and an arm switching pin 51 is provided on the lower surface of the left arm. A partially arc-shaped passive portion 52 that is switched by a tool 37 is provided. The seesaw arm 35 is vertically swingably supported by horizontal pins (spindles) 53 provided on a pair of arm brackets 44, and can change its posture between a position holding position and a holding release position. It is biased to swing toward the position holding position by torsion coil type biasing springs 54 attached to both ends.

In the seesaw arm 35 in the position holding posture, the engagement pin 51 is engaged with the arm engagement hole 36 as shown in FIG. Therefore, the slide base 33 cannot move in either the opening direction or the closing direction. However, when the door panel 1 is operated to open toward the leaving position with the assist structure, at the end of the assist stroke, the arm switching tool 37 comes into contact with the passive part 52 and rotates the seesaw arm 35 in the clockwise direction. 8, the seesaw arm 35 is automatically switched to the holding release position as shown in FIG. 8, and the engagement pin 51 is separated from the arm engagement hole 36. Thereafter, the user can open the door panel 1 to the fully open position by simply pushing the door panel 1 into the door pocket 3 from the left-open position, and the slide base 33 moves to open along with the door panel 1. During this time, the seesaw arm 35 continues to maintain the holding release position (see FIGS. 1(b and c)).

As shown in FIG. 2, an auxiliary handle 55 for pulling out and operating the door panel 1 housed in the door pocket 3 is buried in the closed end of the door panel 1 in a freely undulating manner. By taking the protruding position from the side, the door panel 1 can be pulled out of the door pocket 3 and the handle 10 can be exposed. When the door panel 1 is moved from the fully open position to the closing direction, the slide base 33 also moves together, so when the door panel 1 passes the left-over position and the second base 42 is received by the base block 34, The engaging/disengaging pin 51 falls into engagement with the arm engaging hole 36, and the posture of the seesaw arm 35 is switched to the position holding posture. Thereafter, with the closing operation of the door panel 1, the posture of the trigger body 23 on the open end side is switched to the operating posture by the trigger switching device 27, and the trigger body 23 falls into engagement with the catch portion provided on the bottom wall of the casing 20. During this time, one of the force storage springs 22 is compressed and deformed to store force.

As described above, according to the assist device of the first embodiment having the position holding structure, when the door panel 1 is opened with the assist structure toward the remaining position, the slide base 33 is closed by the base block 34. It is considered impossible to move. Further, the engagement/disengagement pin 51 of the seesaw arm 35 which has been switched to the position holding posture engages with the arm engagement hole 36, and the slide base 33 is held so that it cannot be opened and moved. However, when the door panel 1 is operated to open to the left position using the assist structure, the seesaw arm 35 is automatically switched to the holding release position by the arm switching device 37 that moves together with the door panel 1, and the seesaw arm 35 and The arm engagement hole 36 is disengaged. As a result, the slide base 33 can be moved in the opening direction, and the door panel 1 can be opened from the left-open position to the fully open position.

As described above, according to the sliding door assist device of Embodiment 1, the seesaw arm 35 of the position holding structure is held from the position holding posture by utilizing the movement of the door panel 1 being opened and moved to the leaving position by the assist structure. Since it automatically switches to the release position, it is only necessary to manually push the door panel 1 into the door pocket 3 following the opening movement of the door panel 1 by the assist structure, compared to conventional assist devices of this type. , the opening operation of the door panel 1 at the left-back position can be easily performed with less effort. In addition, when the seesaw arm 35 of the position holding structure is switched to the holding release position, the door panel 1 can be stored in the door bag 3 by simply pushing the door panel 1 lightly, so a large external force is applied to the door panel 1 to engage it. Compared to conventional assist devices that require release of the state, the opening operation of the door panel 1 from the left-back position to the fully open position can be easily performed. Further, when the door panel 1 is opened to the left-open position, the assist device is in a standby state and does not interfere with the opening/closing movement of the door panel 1, so that it is opened to the fully open position and placed inside the door pocket 3. The operation of pulling out the door panel 1 in the stored state can be easily performed.

A seesaw arm 35 disposed on the slide base 33 is supported so as to be swingable by a horizontal pin 53, and is urged to swing toward the position holding position by a biasing spring 54. The door panel 1 has an assist structure by providing the seesaw arm 35 with an engagement pin 51 that engages and disengages from the engagement hole 36 and a passive part 52 that is switched and operated by an arm switching tool 37 provided on the open end side of the casing 20. When the opening operation is performed to the leaving position, the arm switching tool 37 comes into contact with the passive part 52 and switches the seesaw arm 35 from the position holding posture to the holding release posture, so that the slide base 33, the base block 34, Components of the position holding structure, such as the seesaw arm 35 and the biasing spring 54, can be placed using the space between the movement area of the assist structure and the upper wall of the guide rail 4. There is no need to change the structure of the guide rail 4, just add a position holding structure, and the overall cost of the assist device equipped with a position holding function can be reduced. Furthermore, even if the door panel 1 is opened rapidly with a large force, the seesaw arm 35 can be reliably switched from the position holding position to the holding release position using the arm switching device 37, so that external force is not concentrated on the seesaw arm 35. This can reliably prevent damage.

The slide base 33 is composed of a first base 41 that supports the seesaw arm 35, a second base 42 that is received by the base block 34, and a connecting frame 43 that connects both bases 41 and 42. Since the trigger switching tool 27 is provided on the lower surface, the structure of the elongated slide base 33 is not unnecessarily complicated, and the cost of the slide base 33, which is a main component of the position holding structure, can be reduced. Further, the seesaw arm 35 is swingably supported by a horizontal pin 53 provided on the arm bracket 44 of the first base 41, and the arm 35 is held in a position with biasing springs 54 attached to both ends of the pin 53. Since it is oscillated in the opposite direction, the engagement and disengagement operation of the engagement pin 51 with respect to the arm engagement hole 36 of the seesaw arm 35 can be reliably performed, and the reliability of the switching operation of the position holding structure can be improved.

A slide base 33, a base block 34, and a seesaw arm 35 are arranged inside the auxiliary rail 12 provided between the movement area of the runner 5 and the upper wall of the guide rail 4, and the assist structure or the arm provided on the runner 5 is Since the seesaw arm 35 can be switched by the switching tool 37, the components of the position holding structure other than the arm switching tool 37, such as the slide base 33, base block 34, and seesaw arm 35, can be accommodated inside the auxiliary rail 12. can be protected. Further, since the slide base 33 is slid and guided by the auxiliary rail 12, the slide base 33 is prevented from meandering and can be opened and closed correctly in synchronization with the runner 5 and the assist structure.

(Example 2) Example 2 of the sliding door assist device according to the present invention is shown in FIGS. 10 to 13. In the sliding door assist device according to the second embodiment, a seesaw arm 35 is provided on the base block 34 and is supported so as to swing back and forth around a vertical pin 53. The arm 35 is biased toward the position holding position. Further, an arm engaging claw 56 is provided at the closed end of the slide base 33, so that the arm engaging claw 56 is engaged with the seesaw arm 35 when the seesaw arm 35 is switched to the position holding posture. To this end, one end of the seesaw arm 35 is provided with an engaging/disengaging claw 57 that engages with the arm engaging claw 56, and the other end of the seesaw arm 35 is provided with an inclined passive portion 52 that is switched by the arm switching tool 37. has been established.

An arm recess 58 is formed in the lower surface of the open end side of the base block 34, and the seesaw arm 35 is accommodated therein between the peripheral wall of the arm recess 58 and the arm of the seesaw arm 35 on the passive part 52 side. A compression coil type biasing spring 54 is disposed at. A passage groove 59 is formed between the arm recess 58 and the closed end of the base block 34 to allow the arm switching tool 37 to pass therethrough, and a slide piece guided by the rail groove 12a is formed on the front and rear surfaces of the base block 34. 60 are provided. The arm switching tool 37 is provided on the closed end side of the casing 20, and in this embodiment, the arm switching tool 37 is fixed to the upper surface of the connecting seat 16 connected to the casing 20, as shown in FIG. . The slide base 33 is composed of only the first base 41.

When the seesaw arm 35 is in the position holding position, the engaging/disengaging claw 57 is engaged with the arm engaging claw 56 of the slide base 33 as shown in FIG. Can't move. However, when the door panel 1 is operated to open toward the leaving position with the assist structure, at the end of the assist stroke, the arm switching tool 37 comes into contact with the passive part 52 and rotates the seesaw arm 35 in the clockwise direction. The operation automatically switches the seesaw arm 35 to the holding release position as shown in FIG. Thereafter, the user can open the door panel 1 to the fully open position by simply pushing the door panel 1 into the door pocket 3 from the left-open position, and the slide base 33 moves to open along with the door panel 1. When the arm switching device 37 moves in the opening direction together with the door panel 1, the seesaw arm 35 swings to its tilting limit on the position holding posture side by the biasing spring 54, as shown in FIG. 13(b), and moves into the arm recess. It is received by the opening edge of 58. When the door panel 1 is closed from the fully open position to the left-open position, the arm switching tool 37 comes into contact with the seesaw arm 35, switches the arm 35 to the holding release position, and engages and releases the arm engaging claw 56. After being engaged with the pawl 57 in a state facing directly, it is separated from the seesaw arm 35 and passes through the passage groove 59. Since the other structures are the same as in Example 1, the same members are given the same reference numerals and their explanations will be omitted. The same applies to Examples 3 and 4.

According to the assist device of the second embodiment configured as described above, the seesaw arm 35 of the position holding structure is held from the position holding posture by utilizing the movement of the door panel 1 being opened and moved to the leaving position by the assist structure. Since it automatically switches to the release position, it is only necessary to manually push the door panel 1 to the fully open position following the opening movement of the door panel 1 by the assist structure, compared to conventional assist devices of this type. , the opening operation of the door panel 1 at the left-back position can be easily performed with less effort. In addition, when the seesaw arm 35 of the position holding structure is switched to the holding release position, the door panel 1 can be stored in the fully open position by simply pushing the door panel 1 lightly, so a large external force is applied to the door panel 1 to engage it. Compared to conventional assist devices that require release of the state, the opening operation of the door panel 1 from the left-back position to the fully open position can be easily performed. Further, when the door panel 1 is opened to the left-open position, the assist device is in a standby state and does not interfere with the opening/closing movement of the door panel 1, so that it is opened to the fully open position and placed inside the door pocket 3. The operation of pulling out the door panel 1 in the stored state can be easily performed.

A seesaw arm 35 disposed on the base block 34 is supported swingably by a vertical pin 53, is urged to swing toward a position holding position by a biasing spring 54, and has an arm engaging claw. The seesaw arm 35 is provided with an engaging/disengaging pawl 57 that engages with the lever 56 and a passive part 52 that is switched by the arm switching device 37, so that when the door panel 1 is opened to the left position using the assist structure, the arm Embodiment 1 In which the seesaw arm 35 is supported by a horizontal pin 53 so as to be swingable as a seesaw, since the switching tool 37 comes into contact with the passive part 52 to switch the seesaw arm 35 from the position holding posture to the holding release posture. Similarly to the position holding structure, the components of the position holding structure such as the slide base 33, base block 34, seesaw arm 35, and biasing spring 54 are placed in the space between the moving area of the assist structure and the upper wall of the guide rail 4. Therefore, there is no need to change the existing assist structure and the structure of the guide rail 4, just add a position holding structure, and the overall cost of the assist device with a position holding function can be reduced. Further, even when the door panel 1 is rapidly opened with a large force, it is possible to reliably prevent external force from concentrating on the seesaw arm 35 and causing damage, similar to the position holding structure of the first embodiment. Furthermore, since the seesaw arm 35 provided on the base block 34 is engaged with and disengaged from the arm engaging claw 56 provided on the slide base 33, the structure of the slide base 33 is simplified compared to the position holding structure of the first embodiment, and the overall length is Dimensions can be reduced.

(Example 3) Example 3 of the sliding door assist device according to the present invention is shown in FIGS. 14 to 17. In the sliding door assist device according to the third embodiment, the movement of the door panel 1 in the opening direction is prevented by the buffer structure near the end of the assist stroke when the door panel 1 is operated to open toward the left position with the assist structure. I made it pause. As shown in FIG. 14, the buffer structure includes a buffer body 63 formed on the connecting frame 43 of the slide base 33, a swing lever 64 supported horizontally by the runner block 13 of the runner 5, and a swing lever 64. and a lever spring 65 that swings and biases the device toward the standby position. The lever spring 65 is made of a torsion coil spring. The connecting frame 43 in this embodiment is made of a plastic molded product.

As shown in FIG. 14, the lower surface of the buffer body 63 has a buffer groove 67 that guides the driven pin 66 of the swing lever 64 in a Z-shape, and a return groove 68 that allows the driven pin 66 to pass in the closing direction. is formed. The buffer groove 67 is configured in a Z-shape by an inlet guide groove 69 on the closed end side of the buffer body 63, an inclined central guide groove 70, and an outlet guide groove 71 on the open end side. 71 are continuous in a stair-like manner. The upper wall of the entrance guide groove 69 slopes upward toward the central guide groove 70 , and the upper wall of the central guide groove 70 slopes upward toward the outlet guide groove 71 . The return groove 68 is formed parallel to the outlet guide groove 71 and continues to the inlet guide groove 69 in a stepped manner. As shown in FIG. 15, the swing lever 64 is pivotably supported by a pin 74, and the standby position in which the stop arm 75 provided at the halfway point is received by the runner block 13 and the standby position as shown in FIG. As shown by the line, the swing lever 64 can be displaced to an operating position in which it swings clockwise against the spring force of the lever spring 65. The seesaw arm 35 in the third embodiment is the same as the seesaw arm 35 in the first embodiment.

When the user moves the door panel 1 in the opening direction near the end of the opening assist stroke, the driven pin 66 of the swing lever 64 enters the entrance guide groove 69 of the buffer body 63, as shown in FIGS. 17(a and b). As shown, the driven pin 66 falls from the entrance guide groove 69 into the central guide groove 70 and engages with it while being guided by the entrance guide groove 69 . At this time, the driven pin 66 is received by the upper wall of the entrance guide groove 69 which slopes upward, and the swinging lever 64 is slightly elastically deformed downward and climbs over the stepped portion of the upper wall of the entrance guide groove 69. , quickly falls into the central guide groove 70. Furthermore, the driven pin 66 that has fallen into the central guide groove 70 is received and supported by the horizontal receiving wall 70a of the central guide groove 70, as shown in FIG. Unable to move and temporarily stopped.

When the door panel 1 is moved in the closing direction from the above state, the driven pin 66 is guided by the side receiving wall 70a, and resists the spring force of the lever spring 65 in a clockwise direction (see FIG. 17). While swinging toward the buffer groove 67 and the driven pin 66 (the diagram shows the buffer groove 67 and the driven pin 66 viewed from below), it climbs over the stepped portion of the upper wall of the central guide groove 70 and rapidly falls into the exit guide groove 71. Since the driven pin 66 that has fallen into the exit guide groove 71 is received and supported by the horizontal receiving wall 71a as shown in FIG. 17(c), the door panel 1 cannot move any further in the closing direction and is temporarily stopped. In this state, when the door panel 1 is moved in the opening direction, the driven pin 66 is guided by the exit guide groove 71 and passes through the exit guide groove 71 toward the open end, and then moves to the lever as shown in FIG. 17(d). It returns to the standby position under the spring force of the spring 65. Immediately after the driven pin 66 passes through the buffer body 63, as shown in FIG. 14, the arm switching tool 37 comes into contact with the driven part 52 and switches the seesaw arm 35 to the holding release position, so that the door panel 1 is fully opened. Can be opened up to the desired position. When the door panel 1 is closed from the fully open position, the driven pin 66 moves while being guided by the groove portion 68a of the return groove 68 facing the central guide groove 70 and the entrance guide groove 69, which has a small longitudinal width. The groove portion 68a falls into engagement with the entrance guide groove 69 and passes through the groove 69.

As described above, according to the assist device of the third embodiment including the buffer structure, the movement of the door panel 1 in the opening direction is temporarily stopped by the buffer structure near the end of the opening assist stroke. 1 can be prevented from being opened all at once from the end of the opening assist stroke to the fully open position. Therefore, when the door panel 1 is fully opened from the left-open position, the fingertips placed on the handle 10 are prevented from being caught between the opening edge of the door panel 1 and the door bag 3, thereby improving safety. Furthermore, by closing and moving the temporarily stopped door panel 1, the driven pin 66 of the swing lever 64 is caused to fall into engagement with the exit guide groove 71 from the central guide groove 70, and the exit guide groove 71 is moved toward the open end side. It is possible to pass through. Further, the buffer structure functions only when the door panel 1 is fully opened from the left-open position, and when the door panel 1 is moved from the fully open position to the closed position, the driven pin 66 is guided by the return groove 68 and buffered. Since the structure can be passed through without any hindrance, the closing operation of the door panel 1 from the fully open position can be performed easily and simply.

(Example 4) Example 4 of the sliding door assist device according to the present invention is shown in FIG. In the position holding structure according to the fourth embodiment, the seesaw arm 35 is arranged in the left-right direction opposite to that in the first embodiment, and is supported so as to be vertically swingable by a horizontal pin 53 provided on the arm bracket 44. did. Specifically, in FIG. 18, a locking pin 51 is provided on the upper surface of the left half arm of the seesaw arm 35, and a partially arc-shaped passive portion 52 is provided on the lower surface of the right half arm. Along with this, the position of the arm engaging hole 36 of the guide rail 4 is shifted toward the closed end side. A stepped portion 76 is formed before and after the pin of the seesaw arm 35, and a biasing spring 54 is disposed between the stepped portion 76 and the arm bracket 44. Furthermore, the engagement pin 51 is provided with a relief surface 77 that slopes upward from the proximal end portion on the closed end side to the tip end on the open end side.

In the position holding structure described above, similarly to the position holding structure of the first embodiment, the engagement pin 51 engages with the arm engagement hole 36, so that the slide base 33 can be held in an immovable manner. Furthermore, when the door panel 1 is operated to open to the leaving position using the assist structure, the seesaw arm 35 is automatically switched to the holding release position by the arm switching device 37 that moves together with the door panel 1, and the seesaw arm 35 and The arm engagement hole 36 is disengaged. Therefore, the slide base 33 can be moved in the opening direction, and the door panel 1 can be opened from the left-open position to the fully open position.

Further, in the position holding structure according to the fourth embodiment, similarly to the position holding structure according to the first embodiment, when the base block 34 is separated from the guide rail 4, the slide base 33 and the assist device are in a state where both are integrated. can be removed from the guide rail 4. Furthermore, since the relief surface 77 is formed on the engagement pin 51, only the position holding structure including the slide base 33 can be removed from the guide rail 4. Specifically, when the position holding structure is removed from the guide rail 4, the flank 77 comes into contact with the pilot hole edge of the arm engagement hole 36, and the seesaw arm 35 is applied to the biasing force of the biasing spring 54 at the pilot hole edge. It is pushed down in the counterclockwise direction while resisting, and can be removed from the arm engagement hole 36.

In addition to the embodiments described above, the assist device of the present invention can also be applied to a sliding door in which a plurality of door panels 1 are opened and closed by sliding, and it is not necessary that the door panel 1 that is opened is necessarily a sliding door that is accommodated in the door pocket 3. There isn't.

1 Door panel 3 Door pocket 4 Guide rail 5 Runner 12 Auxiliary rail 13 Runner block 20 Casing 21 Damper 22 Energy storage spring 23 Trigger body 27 Trigger switching device 33 Slide base 34 Base block 35 Seesaw arm 36 Arm engagement hole 37 Arm switching device 41 First base 42 Second base 43 Connection frame 44 Arm bracket 51 Engagement/disengagement pin 52 Passive part 53 Support shaft (pin)
54 Biasing spring 56 Arm engaging claw 57 Engaging/disengaging claw 64 Swing lever 66 Passive pin 68 Return groove 69 Entrance guide groove 70 Center guide groove 71 Outlet guide groove

Claims (8)

Between the guide rail (4) and the door panel (1), there is an assist structure that moves the door panel (1) that is being opened toward the left position before the fully open position, and It is equipped with a position holding structure that allows it to move from the left-back position to the fully open position.
The assist structure includes a casing (20) that moves together with the door panel (1), a cylinder-shaped damper (21) placed inside the casing (20), a force storage spring (22), and a trigger body (23). and a trigger switching tool (27) for switching the trigger body (23) between a standby position and an operating position,
The position holding structure includes a slide base (33) that is slidably guided and supported by a guide rail (4), a base block (34) that closes and immovably receives the slide base (33) at a predetermined position, and a slide base (33) that is slidably guided and supported by the guide rail (4). 33), the arm engagement hole (36) provided in the guide rail (4), and the seesaw arm (35) placed toward the arm engagement hole (36). It includes a biasing spring (54) that biases the swinging force, and an arm switching device (37) that swings the seesaw arm (35) against the biasing force of the biasing spring (54).
The seesaw arm (35) is swingably supported by the slide base (33) and held in a position where the engagement pin (51) provided on the arm (35) engages with the arm engagement hole (36). and a holding release position in which the engagement pin (51) is separated from the arm engagement hole (36);
The trigger switching device (27) is provided on the slide base (33), the arm switching device (37) is provided on the open end side of the casing (20),
When the door panel (1) is operated to open toward the left-back position using the assist structure, the engagement pin (51) of the seesaw arm (35) that has been switched to the position holding position is engaged with the arm engagement hole (36). the slide base (33) is held immovably by the engagement;
While the door panel (1) is moving to the open position, the seesaw arm (35) is automatically switched to the holding release position by the arm switching device (37), and the arm engages with the engagement pin (51). An assist device for a sliding door characterized in that the engagement of the hole (36) is released and the door panel (1) can be opened from the left-open position to the fully open position. A seesaw arm (35) disposed on the open end side of the slide base (33) is supported so as to be swingable around a horizontal support shaft (53), and is oriented toward a position holding position by a biasing spring (54). It is oscillated by the
An engagement pin (51) that engages and disengages from the arm engagement hole (36) is formed at one end of the seesaw arm (35), and a passive pin (51) that engages and disengages from the arm engagement hole (36) is formed at the other end of the seesaw arm (35). The sliding door assist device according to claim 1, further comprising a portion (52). The slide base (33) has a first base (41) on the open end side that supports the seesaw arm (35), and a second base (42) on the closed end side that is received and held by the base block (34). It is composed of a connecting frame (43) that connects these two bases (41, 42),
A trigger switching device (27) is provided on the lower surface of the first base (41), and an arm bracket (44) supporting the seesaw arm (35) is formed in a forked shape on the open end side of the first base (41). and
A seesaw arm (35) is swingably supported by horizontal support shafts (53) provided on a pair of arm brackets (44), and is held in position by biasing springs (54) attached to both ends of the support shafts (53). The sliding door assist device according to claim 1 or 2, wherein the sliding door assist device is swing-biased toward the holding position. Between the guide rail (4) and the door panel (1), there is an assist structure that moves the door panel (1) that is being opened toward the left position before the fully open position, and It is equipped with a position holding structure that allows it to move from the left-back position to the fully open position.
The assist structure includes a casing (20) that moves together with the door panel (1), a cylinder-shaped damper (21) placed inside the casing (20), a force storage spring (22), and a trigger body (23). and a trigger switching tool (27) for switching the trigger body (23) between a standby position and an operating position,
The position holding structure includes a slide base (33) that is slidably guided and supported by a guide rail (4), a base block (34) that closes and immovably receives the slide base (33) at a predetermined position, and a base block ( A seesaw arm (35) disposed on the open end side of the slide base (33), an arm engaging claw (56) provided on the closed end side of the slide base (33), and a seesaw arm (35) arranged on the arm engaging claw (56). ); and an arm switching tool (37) that swings the seesaw arm (35) against the urging force of the urging spring (54). It is equipped with
The seesaw arm (35) is swingably supported by a vertical support shaft (53) provided on the base block (34), and the engaging/disengaging claw (57) provided on the arm (35) engages the arm. It is swingable between a position holding position in which it engages with the claw (56) and a holding release position in which the engagement and disengagement claw (57) separates from the arm engagement claw (56);
The trigger switching device (27) is provided on the slide base (33), the arm switching device (37) is provided on the closed end side of the casing (20) of the assist structure,
When the door panel (1) is operated to open toward the left-back position using the assist structure, the engaging/disengaging claw (57) of the seesaw arm (35) that has been switched to the position holding position is engaged with the arm engaging claw (56). the slide base (33) is held immovably by the engagement;
While the door panel (1) is moving to the open position, the seesaw arm (35) is automatically switched to the holding release position by the arm switching tool (37), and the arm engages with the engagement/disengagement claw (57). An assist device for a sliding door characterized in that the engagement of the claw (56) is released and the door panel (1) can be opened from the left-open position to the fully open position. A seesaw arm (35) disposed on the open end side of the base block (34) is supported so as to be swingable around a vertical support shaft (53), and is oriented toward a position holding position by a biasing spring (54). It is oscillated by the
An arm switching tool (37) is provided on the closed end side of the casing (20) of the assist structure,
A locking/disengaging pawl (57) is formed at one end of the seesaw arm (35), and a passive part (52) that is switched and operated by an arm switching tool (37) is provided at the other end of the seesaw arm (35).
The engaging/disengaging claw (57) in the position holding posture engages with the arm engaging claw (56) provided on the closed end side of the slide base (33) to restrict movement of the slide base (33) in the opening direction. The sliding door assist device according to claim 4. When the door panel (1) is operated by the assist structure to open toward the left-open position, the slide base ( 33) and the runner (5),
The buffer structure includes a buffer body (63) provided on a slide base (33), a swing lever (64) supported horizontally by a runner block (13) of a runner (5), and a swing lever ( 64) toward the standby position,
The buffer body (63) includes a buffer groove (67) that guides the movement of the driven pin (66) of the swing lever (64), and a return groove (68) that allows the driven pin (66) to pass in the closing direction. is formed,
The buffer groove (67) is configured in a Z-shape by an entrance guide groove (69), a central guide groove (70), and an outlet guide groove (71), and each groove (69, 70, 71) is shaped like a step. It is continuous,
When the door panel (1) is opened from the left-open position, the driven pin (66) of the swing lever (64) falls from the entrance guide groove (69) into the center guide groove (70) and engages with the swing lever. The driven pin (66) of (64) is received and supported by the horizontal receiving wall (70a) of the central guide groove (70), and the door panel (1) is temporarily stopped.
By closing and moving the temporarily stopped door panel (1), the driven pin (66) of the swing lever (64) falls into engagement with the exit guide groove (71) from the central guide groove (70), and the exit It is possible to pass through the guide groove (71) to the open end side,
When the door panel (1) in the fully open position is operated to close, the driven pin (66) of the swing lever (64) falls from the return groove (68) into the entrance guide groove (69) and engages with it. The sliding door assist device according to any one of claims 1 to 5, which is capable of passing through the buffer body (63). A runner (5) provided on the door panel (1) is guided and supported by a guide rail (4) so as to be freely openable and closable.
A strip-shaped slide base (33), a base block (34), and a seesaw arm ( 35) are arranged,
The sliding door assist device according to any one of claims 1 to 6, wherein the seesaw arm (35) is switched by an arm switching device (37) provided on the assist structure or the runner (5). The base block (34) is fixed at a position that is biased toward the closed end of the guide rail (4) from the closed end of the door panel (1) in the remaining position,
The sliding door assist device according to any one of claims 1 to 7, wherein the closed end of the slide base (33) received and held by the base block (34) projects from the closed end of the door panel (1). .

Images