Breaking device for sliding door

Abstract

To provide a braking device for a sliding door, which can always operate a damper for braking.SOLUTION: Provided is a braking device 2 for a sliding door. A door frame 10 includes a trigger 3. A door panel 11 includes: a casing 4 provided with a slide groove 41 and an engagement groove 42 that communicates with the slide groove 41 and is formed by curving the vicinity of an end of the slide groove; a damper 5; a pusher 6; a tensile elastic body 7; and a slider 8 having an engagement shaft 81 that slides within the slide groove 41 and the engagement groove 42. When the door panel 11 is moved, the slider 8 collides with the trigger 3 and is swung, and the engagement shaft 81 of the slider 8 disengages from the engagement groove 42 of the casing 4 and moves into the slide groove 41.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a braking device for opening and closing a sliding door. [Background technology]

[0002] Traditionally, sliding doors that move along guide rails have been installed in the openings of buildings. In recent years, self-closing sliding doors have come to be used, which automatically move to a closed position (a position that completely blocks the opening) when the sliding door is closed.

[0003] A problem with this self-closing sliding door is that when closing the door (moving it to the closed position), the door can collide with the door frame with force, creating an impact noise, or fingers can accidentally get caught between the door and the door frame.

[0004] In order to solve such problems, a braking device for a sliding door that brakes the sliding door near the closed position has been developed. For example, the opening and closing operation control structure for a sliding door in Patent Document 1 includes a frame member provided with a guide groove and a slide member (pusher) that can slide along the guide groove, and the slide member (pusher) has a swing lever that swings around a swing shaft, and the engagement shaft of the swing lever is engaged in the guide groove at the non-swing position and engaged in the engagement groove at the swing position in the standby state. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2016-142031 A Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, in the conventional sliding door braking device including the sliding door opening / closing operation control structure of Patent Document 1, when the sliding door is forcefully opened or closed, the sliding member (pusher) does not move and only the swing lever rotates suddenly, which can cause the braking damper to not operate (be effective) and generate a collision noise (see Figure 8, "non-stroke rotation").

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a braking device for a sliding door that can ensure that a braking damper is activated. [Means for solving the problem]

[0008] In order to achieve the above object, the sliding door braking device of the present invention is a braking device for a sliding door that controls the movement of a door panel relative to a door frame; the door frame is provided with a trigger that is arranged at a predetermined position so as to protrude toward the door panel; the door panel is provided with a slide groove that extends along the opening and closing direction of the door panel and an engagement groove that communicates with the slide groove and is formed by curving the vicinity of the end of the slide groove, a damper having a cylinder portion and a rod portion, a pusher that is attached to either one of the cylinder portion or the rod portion and moves along the longitudinal direction of the casing, a tensile elastic body that is directly or indirectly suspended between the pusher and the door panel, and a slider that is swingably supported relative to the pusher via a swing shaft, the slider having an engagement shaft that slides in the slide groove and the engagement groove; when the door panel is moved, the slider collides with the trigger to be swingable, and the engagement shaft of the slider disengages from the engagement groove of the casing and moves into the slide groove. Effect of the Invention

[0009] In this way, the sliding door braking device of the present invention comprises a door frame equipped with a trigger, a door panel equipped with a casing provided with a slide groove and an engagement groove formed by curving and communicating with the slide groove, a damper, a pusher, a tensile elastic body, and a slider having an engagement shaft that slides in the slide groove and the engagement groove, and when the door panel is moved, the slider collides with the trigger and is swung, and the engagement shaft of the slider disengages from the engagement groove of the casing and moves to the slide groove. Therefore, when the slider swung, it necessarily moved in the direction that contracted the damper, resulting in a sliding door braking device that can always operate the damper for braking. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a front view illustrating the overall structure of a door frame and a door panel with cutaways, in which (a) is in the open state, (b) is at the start of braking (when the trigger and slider collide), and (c) is in the closed state. [Diagram 2] FIG. 4 is a side view of the sliding door braking device in a standby state. [Diagram 3] FIG. 4 is an enlarged explanatory diagram for explaining the configuration of a slide groove and an engagement groove of a braking device for a sliding door. [Figure 4] FIG. 2 is an exploded perspective view illustrating the configuration of a braking device for a sliding door. [Diagram 5] 1 is a side view of the sliding door braking device during the process of being released from the standby state, in which (a) shows the state where the slider hits the trigger, (b) shows the state where the slider is swinging, and (c) shows the state where the engagement shaft of the slider has reached the slide groove. [Figure 6] 5A is an enlarged partial side view of the braking device of the sliding door in the middle of being released from the standby state, (a) is an enlarged view of part A in FIG. 5, (b) is an enlarged view of part B in FIG. 5, and (c) is an enlarged view of part C in FIG. [Figure 7] 1A and 1B are explanatory diagrams illustrating the operation of a trigger and a slider, in which (a) is a standby state and (b) is an open state. [Figure 8]Fig. 1 shows the operation of a conventional braking device for a sliding door, where (a) is an overall view and (b) is an enlarged view of part A ("non-stroke rotation"). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following embodiment, the door panel is supported by a guide roller (hoist) arranged at the top, but this is merely an example and the present invention is not limited to this example. The present invention can also be applied to a door panel supported by a guide roller arranged at the bottom. EXAMPLES

[0012] (Overall composition) First, the overall structure of the sliding door 1 will be described with reference to Figure 1. The sliding door 1 is configured to close an opening 90 with a door frame 10 and a door panel 11. The door frame 10 is a rectangular frame body, and the door panel 11 is installed inside it so that it can slide left and right.

[0013] The door panel 11 is formed in a square shape, and is supported while being suspended by guide rollers 12, 13 arranged at the top. That is, a rail (channel member) 10a with a downward C-shaped cross section is attached to the upper frame member of the door frame 10, and the guide rollers 12, 13 run (roll) inside this rail 10a, allowing the door panel 11 to slide while suspended. In addition, it is preferable that a lower rail 11b and a lower guide 10b are installed at the bottom.

[0014] Furthermore, in the vicinity of the upper edge of the door panel 11 in this embodiment, between the guide rollers 12, 13 at both ends, a sliding door braking device 2 is installed for controlling the movement of the door panel 11 relative to the door frame 10. The detailed configuration of this sliding door braking device 2 will be described later. The sliding door braking device 2 does not perform a braking function in the open state shown in Fig. 1(a), but performs a braking function from a predetermined position (when braking starts) on the way of moving the door panel 11 in the closing direction shown in Fig. 1(b) to the closed state shown in Fig. 1(c). Note that in this embodiment, the case where the door panel 11 is moved in the closing direction will be described as an example, but the configuration is approximately the same when the door panel 11 is moved in the opening direction.

[0015] (Configuration of the sliding door braking device) As shown in Figures 2 to 4, the sliding door braking device 2 of this embodiment is equipped with a pair of triggers 3, 3 (see Figure 1), one for opening and one for closing, as components on the door frame 10 side; and equipped with a casing 4 with a pair of slide grooves 41 and an engagement groove 42 provided near both ends in the opening and closing direction, a damper 5 having a cylinder portion 51 and a rod portion 52, a pair of pushers 6, 6 for opening and closing that slide within the casing 4 in the opening and closing direction, springs 7, 7 which are tensile elastic bodies stretched between the pair of pushers 6, 6, and sliders 8, 8 supported on the pushers 6, 6 so as to be able to swing.

[0016] The sliding door braking device 2 is arranged so that when the door panel 11 is moved in the door closing direction, the closing slider 8 collides with the closing trigger 3, and the collision causes the slider 8 to swing, causing the engagement shaft 81 of the slider 8 to disengage from the locking groove 42 and slide within the slide groove 41.

[0017] (Door frame configuration) As described above, the sliding door braking device 2 is equipped with a trigger 3 (for closing) near the left end as a component on the door frame 10 side. Another trigger 3 (for opening) is also arranged near the right end of the door frame 10 (see Fig. 1). As shown in Fig. 7, the trigger 3 is integrally equipped with a base part 31 fixed to the door frame 10 and a protrusion 32 protruding from the base part 31 towards the door panel 11. The base part 31 is fixed to the door frame 10 by tapping or the like. Furthermore, the protrusion 32 protruding downward is adapted to fit into a socket 80c of the slider 8, which will be described later.

[0018] In addition, since the triggers 3, 3 are positioned at both ends of the door frame 10 in the opening and closing direction, they are designed to operate both near the end when the door panel 11 is moved in a first direction (e.g., the opening direction) and near the end when the door panel 11 is moved in a second direction (e.g., the closing direction) that is opposite to the first direction.

[0019] Specifically, when the slider 8 is moved to the left in the figure, the left trigger 3 collides with the slider 8, and then the left trigger 3 and the slider 8 engage with each other. Then, the slider 8 oscillates around the swing shaft 61, so the engagement shaft 81 moves clockwise from the engagement groove 42 to the slide groove 41, and the door panel 11 is pulled by the spring 7 and moves slowly to the left. Conversely, when the slider 8 is moved to the right in the figure, the right trigger 3 collides with the slider 8, and then the right trigger 3 and the slider 8 engage with each other. Then, the slider 8 oscillates counterclockwise around the swing shaft 61, so the engagement shaft 81 moves from the engagement groove 42 to the slide groove 41, and the door panel 11 is pulled by the spring 7 and moves slowly to the right.

[0020] (Door panel configuration) As described above, the sliding door braking device 2 comprises, on the door panel 11 side, a casing 4 with a pair of slide grooves 41 and engagement grooves 42 near both ends in the opening and closing direction, a damper 5 having a cylinder portion 51 and a rod portion 52, a pair of opening and closing pushers 6, 6 that slide within the casing 4 in the opening and closing direction, springs 7, 7 which are tensile elastic bodies stretched between the pair of pushers 6, 6, and sliders 8, 8 supported on the pushers 6, 6 so as to be able to swing.

[0021] The casing 4 is made of metal or synthetic resin and has a U-shaped cross section with an open top, and on its side are formed a slide groove 41 extending in the opening / closing direction of the door panel 11 and a locking groove 42 curved upward at a position near the outside of the slide groove 41. Therefore, when the slider 8 is engaged with the trigger 3, the slide groove 41 guides the engagement shaft 81 of the slider 8 in the opening / closing direction when the slider 8 rotates around the swing shaft 61 as the center of rotation. On the other hand, when the slider 8 is not engaged with the trigger 3, the locking groove 42 holds the engagement shaft 81 in an upper position when the slider 8 rotates around the swing shaft 61 as the center of rotation.

[0022] 3, the engagement groove 42 is composed of a semicircular waiting section 42a that houses (holds) the engagement shaft 81 at the end position far from the slide groove 41, an arc section 42b adjacent to the waiting section 42a, and a transition section 42c that smoothly connects the arc section 42b and the slide groove 41. Therefore, when the socket 80c of the slider 8 suddenly hits the protrusion 32 of the trigger 3, it instantly moves from the waiting section 42a to the arc section 42b, and then moves inside the transition section 42c that is inclined in a smooth curve.

[0023] The damper 5 is an oil damper or an air damper composed of a cylinder portion 51 and a rod portion 52. The damper 5 has a function of absorbing the impact on the trigger 3 and a function of attenuating the speed of movement caused by the retraction force of the spring 7. The cylinder portion 51 of the damper 5 is fixed in position within the casing 4 via a fixer 54, and its upper portion is held down by a bridge 53.

[0024] A pusher 6 (for closing) and a pusher 6 (for opening) are connected to the rod portion 52 and the cylinder portion 51 of the damper 5, respectively. These pushers 6, 6 are fitted to the upper edge of the casing main body 40, which is formed in an L-shape, so that they can slide along the inside opening and closing direction of the casing main body 40.

[0025] The pusher 6 has a circular hole 60a near the center of the main body 60 and an arc-shaped long hole 60b toward the rear. A swing shaft 61 is inserted into the circular hole 60a near the center, and the slider 8 is supported so as to be able to swing. An engagement shaft 81 protruding from the side of the slider 8 is inserted into the long hole 60b toward the rear (end side). The engagement shaft 81 is longer than the width of the main body 60 of the pusher 6, so that it protrudes beyond the width of the pusher 6 and moves within the slide groove 41 and engagement groove 42 of the casing 4.

[0026] The spring 7 as a tensile elastic body is a so-called helical spring (coil spring), one end of which is connected to a (first) pusher 6 having a (first; for closing) slider 8, and the other end of which is connected to a (second) pusher 6 having a (second; for opening) slider 8. The spring 7 is in a state stretched beyond its natural length. In other words, the spring 7 pulls the rear side of the slider 8, thereby always biasing the pair of pushers 6, 6 to attract each other.

[0027] The slider 8 is supported by the pushers 6, 6 attached to both ends of the spring 7 as a tensile elastic body so as to be able to swing (rotate) freely via swing shafts 61. The slider 8 is provided in its main body 80 with a socket 80c that fits into the trigger 3 diagonally above and forward of the swing shaft 61, the swing shaft 61 that serves as a rotation shaft when swinging, and an engagement shaft 81 that is disposed on the opposite (rear) side of the socket 80c with respect to the swing shaft 61. Of these, the swing shaft 61 does not protrude from the side of the slider 8, and does not slide in the slide groove 41 or engagement groove 42 of the casing 4. In other words, the swing shaft 61 has a length that is approximately the same as the width of the pusher 6 (width perpendicular to the opening / closing direction).

[0028] The engagement shaft 81 protrudes from the side of the slider 8 and the pusher 6, and moves inside either the slide 41 or the engagement groove 42 of the casing 4 by the swinging motion of the slider 8. That is, when the slider 8 is engaged with the trigger 3, it disengages from the engagement groove 42 and moves into the slide groove 41. On the other hand, when the slider 8 is not engaged with the trigger 3, it remains in the engagement groove 42.

[0029] That is, when the slider 8 engages with the trigger 3, the spring 7 is unlocked and contracts. This causes the engagement shaft 81 to move within the slide groove 41. In reality, the slider 8 engages with the trigger 3 and does not change position, so the door panel 11 is biased by the spring 7 and moves automatically. On the other hand, if the slider 8 does not engage with the trigger 3, the spring 7 is locked and does not contract. Therefore, the door panel 11 is not biased by the spring 7 and can be moved by hand.

[0030] In other words, when the (first) slider 8 fits and is fixed to the (first) trigger 3, it pulls the door panel 11 and the slider 8 integrated with the (second) door panel 11 in the direction of the (first) trigger 3. Conversely, when the (second) slider 8 fits and is fixed to the (second) trigger 3, it pulls the door panel 11 and the slider 8 integrated with the (first) door panel 11 in the direction of the (second) trigger 3. At this time, resistance is applied by the damper 5, which will be described later, and the door panel 11 moves slowly.

[0031] (action) Next, the operation of the braking device 2 for a sliding door of this embodiment will be described with reference to Figures 5 to 7. First, the operation of the braking device 2 for a sliding door when a slider collides will be described with reference to Figures 5(a) to (c).

[0032] First, an ideal case will be described. As shown in Fig. 5(a), when the open door panel 11 is held by hand and slid toward the door frame 10 in the closing direction, the slider 8 collides with the trigger 3. Then, as shown in Fig. 5(b), the socket 80c of the slider 8 collides with (fits) the protrusion 32 of the trigger 3, and the engaging shaft 81 of the slider 8 moves from the engaging groove 42 of the casing 4 to the slide groove 41 (disengages). As a result, the slider 8 becomes slidable relative to the casing 4, and the spring 7 tries to contract due to its elastic force (force trying to contract), and pulls the slider 8 on the opposite side and the door panel 11 integrated with it in the closing direction, as shown in Fig. 5(c). This sliding movement ends when the door panel 11 abuts against the door frame 10 just before the engaging shaft 81 reaches the end of the slide groove 41.

[0033] In the state after the collision (engagement) of the slider 8, in an ideal case, the kinetic energy of the retracting movement of the door panel 11 (caused by the elastic energy of the spring) is converted into thermal energy and absorbed by the damper 5. Therefore, compared to when the door panel 11 is retracted by the spring 7 alone, the speed of the door panel 11 is slowed down by the resistance it encounters.

[0034] However, in the conventional technology, when the door panel 11 is forcefully closed and the receiving port 80c of the slider 8 suddenly hits the projection 32 of the trigger 3, the engagement shaft 81 hits the bottom of the slide groove 41, generating noise. In this case, the slider 8 remains in the same position and does not move in the opening / closing direction, so the damper 5 does not function.

[0035] In contrast to this, if the sliding door braking device 2 of the present invention is used, even if the door panel 11 is forcefully closed and the receiving opening 80c of the slider 8 instantly fits into the projection 32 of the trigger 3, the engagement shaft 81 will not collide with the bottom part of the slide groove 41. In other words, with the sliding door braking device 2 of this embodiment, the slider 8 is forced (inevitably) to move in the opening / closing direction (relatively) with respect to the casing 4 at the same time as the engagement shaft 81 swings, and in addition to coming into oblique contact with the slide groove 41, it is always decelerated by the damper 5 functioning normally.

[0036] (effect) Next, the effects achieved by the braking device 2 for a sliding door of this embodiment will be listed and explained.

[0037] The damper can always be operated. (1) As described above, the sliding door braking device 2 of this embodiment is a braking device for a sliding door 2 that controls the movement of a door panel 11 relative to a door frame 10. The door frame 10 is provided with a trigger 3 that is arranged at a predetermined position so as to protrude toward the door panel 11. The door panel 11 is provided with a casing 4 provided with a slide groove 41 that extends along the opening and closing direction of the door panel 11 and an engagement groove 42 that is connected to the slide groove 41 and is formed by curving the vicinity of the end of the slide groove, a damper 5 having a cylinder portion 51 and a rod portion 52, and a spring 54 that is attached to either the cylinder portion 51 or the rod portion 52. The door panel 11 is provided with a pusher 6 attached to the trigger 3 and moving along the longitudinal direction of the casing 4, a tensile elastic body 7 directly or indirectly stretched between the pusher 6 and the door panel 11, and a slider 8 supported to be swingable relative to the pusher 6 via a swing shaft 61, the slider 8 having an engagement shaft 81 sliding in the slide groove 41 and the engagement groove 42; when the door panel 11 is moved, the slider 8 collides with the trigger 3 and is swingable, and the engagement shaft 81 of the slider 8 disengages from the engagement groove 41 of the casing 4 and moves to the slide groove 42. For this reason, when the slider 8 swings, it necessarily moves in the direction of contracting the damper 5, resulting in a braking device 2 for a sliding door that can always operate the damper 5 for braking.

[0038] In other words, conventionally, when the door panel 11 was moved suddenly, the slider 8 would rotate with force and sometimes collide with the bottom of the slide groove 41. In contrast, in the present invention, even if the door panel 11 was moved suddenly, the slider 8 would move within the curved engagement groove 42 and move to the slide groove 41. In other words, when the engagement shaft 81 moves from the engagement groove 42 to the slide groove 41, it will inevitably move in the opening / closing direction from the initial movement. For this reason, the damper 5 is designed to function from the initial movement.

[0039] (2) In addition, the length of the oscillating shaft 61 is made approximately the same as the width of the pusher 6, so that the oscillating shaft 61 does not slide within the slide groove 41 and the engagement groove 42. Therefore, compared to the conventional example shown in Fig. 8, there is no need to extend the slide groove 41 beyond the engagement groove 42 to allow the oscillating shaft 61 to escape, and the slide groove 41 is curved and connected directly to the engagement groove 42, resulting in a simple configuration.

[0040] (3) Furthermore, the engagement groove 42 is composed of a standby section 42a that accommodates the engagement shaft 81 in a standby state at the end position far from the slide groove 41, an arc section 42b adjacent to the standby section 42a, and a transition section 42c that smoothly connects the arc section 42b and the slide groove 41. In this way, the presence of the transition section 42c allows the engagement shaft 81 to move slowly into the slide groove 41, so that the damper 5 always operates. Furthermore, the presence of the arc section 42b allows the slider 8 to oscillate during the initial movement, making the initial movement extremely smooth.

[0041] (4) In this case, it is preferable that the door frame 10 has a pair of triggers 3, 3 for opening and closing, and the door panel 11 has a casing 4 provided with a pair of slide grooves 41 and engagement grooves 42 for opening and closing, a pair of pushers 6, 6 for opening and closing, which are attached to a cylinder part 51 and a rod part 52, respectively, and move along the longitudinal direction of the casing 4, a spring 7 as a tensile elastic body stretched between the pair of pushers 6, 6, and a pair of sliders 8, 8 supported swingably on the pair of pushers 6, 6. In this way, the sliding door braking device 2 has both opening and closing functions, so that soft opening / soft closing can be applied to opening and closing, respectively.

[0042] Although an embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes that do not deviate from the gist of the present invention are included in the present invention. [Explanation of symbols]

[0043] 1: Sliding door 2: Braking device 3: Trigger 31: Base section 32: Protrusion 4: Casing 40: Casing body 41: Slide groove 42: Engagement groove 42a: Standby section 42b: Arc section 42c: Transition 5: Damper 51: Cylinder section 52: Rod section 53: Bridge 54: Fixer 6: Pusher 60: Main body 60a: Circular hole 60b: Long hole 61: Swing shaft 7: Spring (tensile elastic body) 8: Slider 80: Main body 80c: Socket 81: Engagement shaft 90: Opening 10: Door frame 10a: Rail 10b: Lower guide 11: Door 11b: Lower rail 12: Guide roller 13: Guide roller

Claims

1. A braking device for a sliding door that controls the movement of a door panel relative to a door frame; The door frame is: a trigger disposed at a predetermined position so as to protrude toward the door panel; The door panel is: A casing provided with a slide groove extending along the opening and closing direction of the door panel and an engagement groove communicating with the slide groove and formed by curving the vicinity of the end of the slide groove; a damper having a cylinder portion and a rod portion; a pusher attached to either the cylinder portion or the rod portion and moving along a longitudinal direction of the casing; A tensile elastic body that is directly or indirectly stretched between the pusher and the door panel; a slider supported to be swingable relative to the pusher via a swing shaft, the slider having an engagement shaft that slides in the slide groove and the engagement groove; A braking device for a sliding door, in which, when the door panel is moved, the slider collides with the trigger, causing it to swing, and the engagement shaft of the slider disengages from the engagement groove of the casing and moves into the slide groove.

2. 2. The braking device for a sliding door according to claim 1, wherein the length of the pivot shaft is substantially the same as the width of the pusher, thereby preventing the pivot shaft from sliding within the slide groove and the engagement groove.

3. 2. The braking device for a sliding door as described in claim 1, wherein the engagement groove is composed of a waiting section that stores the engagement shaft in a waiting state at an end position far from the slide groove, an arc section adjacent to the waiting section, and a transition section that smoothly connects the arc section and the slide groove.

4. The door frame is: A pair of said triggers for opening and closing; The door panel is: the casing having a pair of the slide groove and the engagement groove for opening and closing; a pair of pushers for opening and closing, the pair of pushers being attached to the cylinder portion and the rod portion, respectively, and moving along the longitudinal direction of the casing; The tensile elastic body is stretched between the pair of pushers; The braking device for a sliding door according to any one of claims 1 to 3, further comprising: a pair of the sliders each pivotably supported by the pair of the pushers.

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