Rebound suppression system for a sliding door

Abstract

Rebound suppression system for a sliding door (1), comprising: a sliding door (1); a rail (4); a movable retaining section (2) which is designed to move along the rail (4) in accordance with the opening and closing movement of the sliding door (1), has a first width perpendicular to the direction of movement and is in contact with a first surface of the rail (4); wherein the rail (4) has a fitting section (41, 41a, 41b, 42) having a second width perpendicular to the direction of movement which is smaller than the first width of the movable holding section (2), and which is provided on at least a part of the rail (4), wherein the fitting section (41, 41a, 41b, 42) is provided on the first surface of the rail (4); a rebound prevention unit (21, 22) having a third width perpendicular to the direction of movement, which is smaller than the second width of the passing section (41, 41a, 41b, 42); and a pressing mechanism (8) designed to press the rebound prevention unit (21, 22) against the first surface of the rail (4) and / or the fitting section (41, 41a, 41b, 42) at all times, wherein the fitting section (41, 41a, 41b, 42) is arranged at a position on the first surface of the rail (4) where the rebound prevention unit (21, 22) is located in a closed position of the sliding door (1), and / or is arranged at a position on the rail (4) where the rebound prevention unit (21, 22) is located in an open position of the sliding door (1); wherein the fitting section (41, 41a, 41b, 42) is a V-shaped recess (42) in the rail (4), and wherein the recess (42) is formed by two inclined sections opposite each other in the direction of movement; and where, due to the fact that the first width of the movable retaining section (2) is greater than the second width of the fitting section (41, 41a, 41b, 42), the movable retaining section (2) touches the first surface of the rail (4), regardless of whether it is in front of, behind or directly above the fitting section (41, 41a, 41b, 42).

Description

Field of the invention

[0001] The present invention relates to a rebound suppression system for a sliding door, and more particularly to a rebound suppression system for a sliding door that can be easily incorporated into a machine without interfering with other components. Description of the state of the art

[0002] A machine tool's protective cover is equipped with a sliding door for access from the outside to the inside, which is opened and closed by a rail and rollers. When the sliding door is opened or closed forcefully by a worker, it can sometimes rebound against one end of a moving part. Fig. Figure 18 is a diagram showing an example of the structure of a conventional sliding door.

[0003] In the construction example shown in Fig. 18, a sliding door 1 is provided with several rollers 2, and a rail 4 is attached to a frame. While the rollers 2 rotate along the rail 4, the sliding door 1 moves in the direction shown in Fig. 18 is indicated by M.

[0004] If the sliding door 1 is housed in a door box 5, a worker can enter the interior from outside the protective cover. Moreover, if a worker opens the sliding door 1 in the direction shown in Fig. 18 indicated by N, moves to perform machining, a key 3 attached to the sliding door 1 is inserted into a lock mechanism 7 attached to a door frame 6 and locked by the lock mechanism 7, thereby maintaining a closed state of the sliding door 1.

[0005] If the sliding door 1 then swings towards the door frame 6 (in the direction shown in Fig. 18 is indicated by N), it may sometimes violently collide with the door frame 6 and rebound. When the sliding door 1 rebounds in this way, a force generated by the rebound of the sliding door 1 is concentrated on the key 3 and the lock mechanism 7, as shown in Fig. 19. Therefore, the lock mechanism 7 is subjected to heavy loads, which may cause it to wear or be damaged. Thus, there is a need to suppress such rebound.

[0006] Moreover, sometimes a so-called “play of a sliding door” may be caused, such that the sliding door 1 cannot move to the innermost part of the door frame at its open end when it is moved to its open or closed end, or the sliding door 1 does not contact a frame at its closed end, as in Fig. 19. When such play of the sliding door is caused, there arises a problem that, particularly at the closed end, mist and chips leak from the protective cover through a gap between the sliding door 1 and the frame.

[0007] Furthermore, in some cases, the machine tool is used in a harsh environment where cutting fluid, mist, chips, and the like are scattered. Therefore, there is a need to reduce the causes of failures by making the structure of a sliding door rebound suppression system as simple as possible and isolating the location of the rebound suppression system from the inside of a machining chamber of the machine tool and the outside of the machine tool. On the other hand, various components such as a sensor, an actuator, and wiring are often mounted in positions isolated from the inside of the machining chamber of the machine tool and the outside of the machine tool, so mutual interference must be avoided.To achieve this, the rebound suppression system for a sliding door is expected to be small in size and design flexibility is required for the installation site.

[0008] For example, JP 2006-219885 A discloses, as a means for overcoming the rebound of a sliding door, a roller latch mechanism configured to press a roller against a conical surface of a roller guide, thereby preventing rebound of the sliding door.

[0009] However, in the technique of JP 2006-219885 A described above, the rebound of the sliding door is prevented by providing such a structure that the roller, which is continuously urged by a spring, is mounted on the upper part of the door end and pressed against the tapered surface of the roller guide near a position where the sliding door is closed.

[0010] However, in many machine tools, a safety switch and other sensors, an actuator, and the like are mounted at the upper part of the sliding door end, and interference with these components sometimes cannot be avoided due to design constraints. Even if the roller is located at a position other than the sliding door end, the roller guide must be arranged according to the sliding door's movement range, so the problem of interference with other components cannot be completely avoided.

[0011] DE 33 36 565 A1 shows a sliding door with a buffer device having a pin that can be inserted into a buffer piece. DE 103 50 810 A1 shows a sliding door with a damping device comprising a guide surface and a damper, wherein the damper engages with the guide surface when the sliding door is in a closed position. EP 1 555 369 A1 shows a sliding door with a braking mechanism, wherein parts of a guide rail are spring-loaded and pivotable. US 2 990 566 A shows a sliding door with a friction damper as a stop. US 6 003 201 A shows a method and apparatus for counteracting the effects of deformation, distortion, and / or tilt of a support rail in a sliding door assembly, so that the sliding door can be moved freely along the support rail, but, if desired, can be secured at one or more points so that an external force is required to move the sliding door from its desired position.From DE 196 01 287 A1 a drive for sliding guidance of windows, doors, etc. is known, wherein a roller carriage is arranged in a guide rail and a pressure element presses the rollers of the carriage from the inside against a lower inner surface of the guide rail. SUMMARY OF THE INVENTION

[0012] Accordingly, an object of the present invention is to provide a rebound suppression system for a sliding door that can be easily incorporated into a machine without interfering with other components.

[0013] This object is achieved by a rebound suppression system having the features of claim 1. Advantageous developments of the invention emerge from the dependent claims.

[0014] A first aspect of a rebound suppression system for a sliding door includes a sliding door, a rail provided on the sliding door, a movable support portion fixed to an outer frame of the sliding door and configured to move along the rail in accordance with the opening and closing movement of the sliding door, a fitting portion having a width smaller than the width of the movable support portion and provided on at least a part of the rail, a rebound prevention unit having a width smaller than that of the fitting portion and provided on the outer frame of the sliding door, and a pressing mechanism configured to press the rebound prevention unit against the rail or the fitting portion.The fitting portion is provided at a position of the rebound prevention unit on the rail where the sliding door is located at its closed end and / or at a position of the rebound prevention unit on the rail where the sliding door is located at its open end, wherein the fitting portion is a V-shaped recess in the rail, and wherein the recess is formed by two inclined portions opposite each other in the moving direction of the roller.

[0015] A second aspect of the rebound suppression system for a sliding door includes a sliding door, a rail provided on an outer frame of the sliding door, a movable support portion fixed to the sliding door and configured to move along the rail according to the opening and closing movement of the sliding door, a fitting portion having a width smaller than the width of the movable support portion and provided on at least a part of the rail, a rebound prevention unit having a width smaller than that of the fitting portion and provided on the sliding door, and a pressing mechanism configured to press the rebound prevention unit against the rail or the fitting portion.The fitting portion is provided at a position of the rebound prevention unit on the rail where the sliding door is located at its closed end and / or at a position of the rebound prevention unit on the rail where the sliding door is located at its open end, wherein the fitting portion is a V-shaped recess in the rail, and wherein the recess is formed by two inclined portions opposite each other in the moving direction of the roller.

[0016] The pressing mechanism for the rebound prevention unit may have a structure combining an elastic body and a unidirectional damper.

[0017] The movable holding portion may be a roller configured to roll on the rail or a sliding member configured to slide on the rail.

[0018] The anti-rebound unit can be a roller or a ball roller.

[0019] According to the present invention, a rebound suppression system for a sliding door can be constructed at a position where rollers and a rail of a sliding door are provided, so that interference with other components can be easily prevented, and moreover, the rebound suppression system can be implemented only by changing the shape of a part of the rail and adding a rebound prevention roller and a pressing mechanism attached to the sliding door, so that it can be easily incorporated into an existing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects and features of the present invention will become apparent from the following description of embodiments with reference to the accompanying drawings, in which Fig. 1 is a diagram illustrating a rebound suppression system for a sliding door according to a first embodiment of the present invention; Fig. 2 is a diagram illustrating the width size of a slant section of a rail embodying the rebound suppression system for a sliding door of Fig. 1 forms; Fig. 3 is a view illustrating a pressing mechanism implementing the rebound suppression system for a sliding door of Fig. 1 and is designed to press a rebound prevention roller against the rail; Fig. 4 is an enlarged diagram showing the environment of the rebound suppression roller and the pressing mechanism of the sliding door in the rebound suppression system for a sliding door of Fig. 1 shows; Fig. 5 is a diagram showing the function of the rebound prevention roller and the inclined portion of the rail in the rebound suppression system for a sliding door of Fig. 1 illustrates; Fig. 6A and Fig. 6B are enlarged views showing the vicinity of the rebound prevention roller in the rebound suppression system for a sliding door of Fig. 1, with the sliding door at its closed end, with Fig. 6A is a perspective view, and Fig. 6B is a view in the direction shown in Fig. 6A is indicated by F; Fig. 7 is an enlarged view showing the vicinity of the rebound prevention roller in the rebound suppression system for a sliding door of Fig. 1, with the sliding door at its open end; Fig. 8A and Fig. 8B are views illustrating a rebound suppression system for a sliding door according to a second embodiment of the present invention, wherein Fig. 8A is a view of the rebound suppression system for the sliding door in the direction of movement of the sliding door, and Fig. 8B is a view from the front surface side of the sliding door; Fig. 9A and Fig. 9B are enlarged views showing the vicinity of a rebound prevention roller of the rebound suppression system for the sliding door of Fig. 8A and Fig. 8B, with the sliding door at its closed end; Fig. 10A and Fig. 10B are views illustrating a rebound suppression system for a sliding door according to a third embodiment of the present invention, wherein Fig. 10A is a view of the rebound suppression system for the sliding door in the direction of movement of the sliding door, and Fig. 10B is a view from the front surface side of the sliding door; Fig. 11A and Fig. 11B are enlarged views showing the vicinity of a rebound prevention roller of the rebound suppression system for the sliding door of Fig. 10A and Fig. 10B, with the sliding door moved to its open end, with Fig. 11A is a view of the rebound suppression system for the sliding door in the direction of movement of the sliding door, and Fig. 11B is a view from the front surface side of the sliding door; Fig. 12A and Fig. 12B are views illustrating a rebound suppression system for a sliding door according to a fourth embodiment of the present invention, wherein Fig. 12A is a view of the rebound suppression system for the sliding door in the direction of movement of the sliding door, and Fig. 12B is a view from the front surface side of the sliding door; Fig. 13A and Fig. 13B are enlarged views showing the vicinity of a rebound prevention roller of the rebound suppression system for the sliding door of Fig. 12A and Fig. 12B, where Fig. 13A is a view of the rebound suppression system for the sliding door in the direction of movement of the sliding door, and Fig. 13B is a view from the front surface side of the sliding door; Fig. 14 is a view showing a rebound suppression system for a sliding door according to a fifth embodiment of the present invention; Fig. 15 is a view showing a rebound suppression system for a sliding door according to a sixth embodiment of the present invention; Fig. 16A and Fig. 16B are views illustrating an example of the rebound suppression system for a sliding door according to the present invention using a ball roller, wherein Fig. 16A is a view of the rebound suppression system for the sliding door in the direction of movement of the sliding door, and Fig. 16B is a view from the front surface side of the sliding door; Fig. 17A and Fig. 17B are enlarged views showing the vicinity of a rebound prevention roller of the rebound suppression system for the sliding door of Fig. 16A and Fig. 16B, with the sliding door moved to its open end; Fig. 18 is a diagram showing the structure of a conventional sliding door; and Fig. 19 is a diagram illustrating a problem of the structure of the conventional sliding door. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] With reference to Fig. 1 to 7, a first embodiment of a rebound suppression system for a sliding door according to the present invention will first be described.

[0022] Fig. 1 is a structural diagram showing an embodiment of the rebound suppression system for a sliding door according to the present invention.

[0023] In the rebound suppression system for a sliding door according to the present embodiment, a rail 4 fixed to a frame (not shown) is provided at one of several parts thereof with inclined portions (in Fig. 1 inclined sections 41a and 41b). A sliding door 1 is provided with rollers 2 and a rebound prevention roller 21. The rollers 2 roll on the rail 4 and thereby carry the sliding door 1 for movement in the direction shown in Fig. 1 is indicated by A. The anti-rebound roller 21 is always pressed against the rail 4 by a pressing mechanism 8.

[0024] The beveled sections 41a and 41b can be shaped, for example, such that one end is cut diagonally downwards. As in Fig. 2, the inclined sections 41a and 41b are further formed such that their width d c (the direction orthogonal to the directions of movement of rollers 2 and 21, which in Fig. 2 is given by B) is smaller than a width d a of each roller 2 and slightly larger than the width of the anti-rebound roller 21. In this way, the rollers 2 can always be kept in contact with the rail 4, regardless of whether they are located in front of, behind, or just above the inclined portion 41a. Thus, the inclined portion 41a (and the inclined portion 41b) can be provided at any part of the rail 4.

[0025] Fig. 3 is a view illustrating the pressing mechanism 8 that presses the rebound prevention roller 21 against the rail 4.

[0026] As illustrated, the pressing mechanism 8 includes a unidirectional damper 82 forming a flexible part, and a spring 81 configured to always exert a force in the direction of extension of the flexible part. With this configuration of the pressing mechanism 8, the anti-rebound roller 21, which is mounted at a fixing hole 83, can be pressed against the rail 4, and vibrations generated in the flexible part of the pressing mechanism 8 can be absorbed by the unidirectional damper 82.

[0027] Fig. Fig. 4 is an enlarged diagram showing the vicinity of the rebound preventing roller 21 and the pressing mechanism 8 of the sliding door 1 in the rebound suppression system for a sliding door of Fig. 1 shows.

[0028] As in Fig. 4, the pressing mechanism 8 is supported by a holding section 9 fixed to the sliding door 1. The rebound prevention roller 21, which is attached to the fixing opening 83 of the pressing mechanism 8, is adapted to move in the direction shown in Fig. 4 is indicated by C. Preferably, the range of movement of the anti-rebound roller 21 should be set so that at least the lower end of the anti-rebound roller 21 can move upward to a position at the same height as the lower end of the rollers 2 attached to the sliding door 1 and downward to a position at the same height as the lower end of the sections 41a and 41b.

[0029] Moreover, the rebound prevention roller 21 is always pressed against the rail 4 by the spring 81 of the pressing mechanism 8.

[0030] According to the rebound suppression system for a sliding door having the above-described structure, when a worker moves the sliding door 1 toward its closed end (i.e., in the direction of closing the sliding door 1) by the rollers 2 rotating in contact with the rail 4, the sliding door 1 is moved along the rail 4 without resistance when the rebound prevention roller 21 is located on the rail 4. When the sliding door 1 is moved near its closed end so that the rebound prevention roller 21 is located as shown in Fig. 5, the anti-rebound roller 21 is pressed against the inclined portion 41a by the pressing mechanism 8. Consequently, a counterforce is generated against the anti-rebound roller 21 by the inclined portion 41a, and the generated counterforce is transmitted to the holding portion 9 so that the sliding door 1 is moved toward a door frame 6 (in the direction shown in Fig. 5 is indicated by E). This prevents the sliding door 1 from rebounding when it collides forcefully with the door frame 6.

[0031] Fig. 6A and Fig. 6B show the vicinity of the rebound prevention roller 21 and the inclined portion 41 of the rail 4 in the rebound suppression system for a sliding door, wherein the sliding door 1 is at its closed end (or in a closed state), wherein Fig. 6A is a perspective view and Fig. 6B is a view in the direction shown in Fig. 6A is indicated by F.

[0032] When the rebound prevention roller 21 is seated in the inclined portion 41a of the rail 4, as shown in Fig. 6A and Fig. 6B, the force to press the sliding door 1 against the door frame 6 is transmitted through the holding portion 9, thereby preventing the sliding door 1 from rebounding.

[0033] Fig. 7 is a perspective view showing the vicinity of the rebound prevention roller 21 and the inclined portion 41b of the rail 4 with the sliding door 1 at its open end (or in an open state).

[0034] When the sliding door 1 is displaced toward its open end (in the direction of opening the sliding door 1), the rebound prevention roller 21 is seated in the inclined portion 41b opposite to the inclined portion 41a near the open end of the sliding door 1, as shown in Fig. 7, so that the upper end of the sliding door 1 can be pressed against the innermost part of the door box to prevent the sliding door 1 from rebounding in the same way.

[0035] And when the worker applies force to move the sliding door 1 from its closed or open end toward the open or closed end, the anti-rebound roller 21 pushes the pressing mechanism 8 upward while climbing the slopes of the inclined portions 41a and 41b. This allows the sliding door 1 to be moved without requiring excessive force.

[0036] In the rebound suppression system for a sliding door of the present embodiment having the above-described structure, the sliding door 1 is pressed toward the door frame 6 when it is at its closed end by the counterforce acting between the rebound prevention roller 21 and the inclined portions 41a and 41b, and pressed against the innermost part of a door box 5 when it is at its open end. Therefore, the sliding door 1 can be prevented from rebounding when it is vigorously opened or closed. Moreover, when the sliding door is at its open or closed end, a force always acts to fully open or close the sliding door. Accordingly, the occurrence of what is called "sliding door backlash" can be suppressed without any special regulation of the positional relationship between the rebound prevention roller 21 and the rail 4.Therefore, in particular, no gap is generated between the sliding door 1 and the door frame 6 at the closed end, so that mist and chips can be prevented from escaping from a protective cover.

[0037] In the present embodiment, the rebound preventing roller 21 is always kept in contact with the rail and the inclined portions by the pressing force of the spring 81 of the pressing mechanism 8. By appropriately selecting the spring 81, the sliding door 1 can be prevented from rebounding and the generation of a heavy load when the sliding door 1 is opened can be prevented. Moreover, if the selected unidirectional damper 82 has such a performance that it can prevent the occurrence of rebound of the sliding door 1, the sliding door 1 can be prevented from rebounding when it forcefully collides with the innermost parts of the door frame 6 and the door box 5. Moreover, when the worker opens the sliding door 1 at a normal speed, the counterforce from the unidirectional damper 82 is so small that the sliding door 1 can be moved as described above without requiring excessive force.

[0038] The rebound suppression system for a sliding door of the present invention can be installed within a range where the rollers 2 and the rail 4, as constituent elements of the sliding door 1, move. Since no other components are provided in the part of the sliding door 1 where the rollers 2 and the rail 4 are installed, in order to avoid mutual interference with the movable sliding door, the rebound suppression system for a sliding door never interferes with the other components. Moreover, the rebound suppression system for a sliding door can be easily incorporated into an existing machine because it can be implemented merely by changing the shape of a part of the rail 4 and adding the pressing mechanism 8 and the rebound prevention roller 21 mounted on the sliding door 1.

[0039] Moreover, the part of the sliding door 1 where the rollers 2 and the rail 4 are in contact with each other is normally isolated from mist and chips, so that the failure rate of the rebound suppression system for the sliding door can be reduced.

[0040] Moreover, the two inclined portions 41a and 41b inclined in opposite directions to each other are individually provided on the rail 4, so that the sliding door 1 can be prevented from rebounding in the case of closing the sliding door 1 and also in the case of opening the sliding door 1 by using the single rebound preventing roller 21.

[0041] Now, with reference to Fig. 8A to 9B, a second embodiment of the rebound suppression system for a sliding door according to the present invention will be described.

[0042] In the first embodiment described above, the rollers 2 are provided on the sliding door 1, and the rail 4 is fixed to a frame. In the second embodiment, rollers are provided on an outer frame of a sliding door 1, and a rail 4 is fixed to the sliding door.

[0043] Fig. 8A and Fig. 8B are views illustrating the rebound suppression system for a sliding door, wherein Fig. 8A is a view of the rebound suppression system in the direction of movement of the sliding door, and Fig. 8B is a view from the front surface of the sliding door. In Fig. However, in Figure 8B the sliding door has not been shown so that the internal structure is visible.

[0044] In the rebound suppression system for a sliding door of the present embodiment, as shown in Fig. 8A and Fig. As shown in Fig. 8B, the rail 4 is provided on the sliding door 1, and the rollers 2 are fixed to the outer frame of the sliding door. Moreover, a pressing mechanism 8 is held by a holding portion 9 fixed to the sliding door 1. A rebound prevention roller 21, which is provided at a fixing opening 83 (see Fig. 3) of the pressing mechanism 8 is designed to move in the direction shown in Fig. 8A by G. In addition, the rail 4 is provided with two inclined portions 41a and 41b which are inclined in opposite directions to each other, as shown in Fig. 8B is shown.

[0045] Fig. 9A and Fig. 9B are enlarged views illustrating the vicinity of the rebound prevention roller of the rebound suppression system for the sliding door, with the sliding door 1 at its closed end (or in a closed state). Fig. 9A is a view of the rebound suppression system in the direction of movement of the sliding door, and Fig. 9B is a view from the front surface side of the sliding door. In Fig. In Figure 9B, the sliding door has been omitted so that the internal structure is visible.

[0046] If the sliding door 1 is as shown in Fig. 9A, the anti-rebound roller 21 is pushed upward by the pressing mechanism 8 so that it rolls onto the inclined portion 41a, after which the anti-rebound roller 21 is pressed against the inclined portion 41a. Since the inclined portion 41a of the rail 4 is then pressed by the anti-rebound roller 21, as shown in Fig. 9B, the sliding door 1 becomes a door frame 6 (in the direction shown in Fig. 9B is indicated by H), whereby the sliding door 1 can be prevented from rebounding.

[0047] When the sliding door 1 is at its open end (not shown), the rebound prevention roller 21 is pushed upward by the pressing mechanism 8 so that it rests on the inclined portion 41b (see Fig. 8B), after which the anti-rebound roller 21 is pressed against the inclined portion 41b of the rail 4. Since the inclined portion 41b of the rail 4 is then pressed by the anti-rebound roller 21, the upper end of the sliding door 1 is pressed against the innermost part of a door frame, whereby the sliding door 1 can be prevented from rebounding.

[0048] With reference to Fig. 10A to 11B, a third embodiment of the rebound suppression system for a sliding door according to the present invention will now be described. Fig. 10A is a view of the rebound suppression system for the sliding door in the moving direction of a sliding door, and Fig. 10B is a view from the front surface of the sliding door. In Fig. In Figure 10B, the sliding door has been omitted so that the internal structure is visible.

[0049] In the rebound suppression system for a sliding door of the present embodiment, as in the first embodiment, rollers 2 are provided on a sliding door 1, and a rail 4 is fixed to an outer frame of the sliding door, as shown in Fig. 10A and Fig. 10B. Moreover, a pressing mechanism 8 is held upwardly with respect to the holding portion 9 by a holding portion 9 fixed to the sliding door 1. A rebound prevention roller 21 provided at a fixing opening 83 (see Fig. 3) of the pressing mechanism 8 is designed to move in the direction shown in Fig. 10A is indicated by J. In addition, the rail 4 is provided with two inclined portions 41a and 41b which are inclined in opposite directions to each other, as shown in Fig. 10B is shown.

[0050] Fig. 11A and Fig. 11B are enlarged views showing the vicinity of the rebound prevention roller of the Fig. 10A and Fig. 10B, with the sliding door moved to its open end. Fig. 11A is a view of the rebound suppression system for the sliding door in the moving direction of the sliding door 1, and Fig. 11B is a view from the front surface side of the sliding door. In Fig. In Figure 11B, the sliding door 1 has not been shown so that the internal structure is visible.

[0051] If the sliding door 1 is as shown in Fig. 11B, the anti-rebound roller 21 is pushed upward by the pressing mechanism 8 so that it rolls onto the inclined portion 41b, after which the anti-rebound roller 21 is pressed against the inclined portion 41b. When the anti-rebound roller 21 is pressed by a counter force from the inclined portion 41b, the sliding door 1 is moved to the innermost part of a door box (in the direction shown in Fig. 11B is indicated by K), whereby the sliding door 1 can be prevented from rebounding.

[0052] When the sliding door 1 is at its closed end (not shown), the rebound prevention roller 21 is pushed upward by the pressing mechanism 8 so that it rests on the inclined portion 41a (see Fig. 10B), after which the anti-rebound roller 21 is pressed against the inclined portion 41a. When the anti-rebound roller 21 is pressed by a counterforce from the inclined portion 41a, the sliding door 1 is pressed into a frame, whereby the sliding door 1 can be prevented from rebounding.

[0053] With reference to Fig. 12A to 13B, a fourth embodiment of the rebound suppression system for a sliding door according to the present invention will now be described.

[0054] Each of the first to third embodiments described above is provided with the system configured to suppress the rebound of the sliding door 1 by pressing the rebound preventing roller 21 against the inclined portions 41a and 41b on the rail 4. In contrast, the present embodiment is provided with a system configured to suppress the rebound of a sliding door

[0055] Fig. 12A and Fig. 12B are views illustrating the rebound suppression system for a sliding door according to the present embodiment. Fig. 12A is a view of the rebound suppression system in the direction of movement of the sliding door, and Fig. 12B is a view from the front surface side of the sliding door. In Fig. In Figure 12B, the sliding door has been omitted so that the internal structure is visible.

[0056] In the rebound suppression system for a sliding door according to the present embodiment, as shown in Fig. 12A and Fig. 12B, rollers 2 are provided on a sliding door 1, and the rail 4 is fixed to an outer frame of the sliding door. Moreover, a pressing mechanism 8 is held by a holding portion 9 fixed to the sliding door 1. A rebound prevention roller 21, which is provided at a fixing opening 23 (see Fig. 3) of the pressing mechanism 8 is designed to move in the direction shown in Fig. 12A is indicated by L. In addition, the rail 4 is provided with the recess 42, as in Fig. 12B is shown.

[0057] Fig. 13A and Fig. 13B are enlarged views showing the vicinity of the rebound prevention roller of the Fig. 12A and Fig. 12B, with the sliding door moved to its open end. Fig. 13A is a view of the rebound suppression system for a sliding door in the moving direction of the sliding door 1, and Fig. 13B is a view from the front surface side of the sliding door. In Fig. In Figure 13B, the sliding door has been omitted so that the internal structure is visible.

[0058] When the sliding door 1 is moved close to its open end so that the anti-rebound roller 21 is seated in the recess 42 of the rail 4, as shown in Fig. As shown in Fig. 13A, the anti-rebound roller 21 is pressed against the recess 42 by the pressing mechanism 8. Then, a force is generated to maintain the anti-rebound roller 21 at the lowest position of the recess 42. Thus, by regulating the positional relationship between the recess 42 of the rail 4 and the innermost part of the door frame 5, a function can also be provided to prevent a sweeping collision of the sliding door 1 with the innermost part of the door frame 5 and a rebound. In this way, wear due to collision between the sliding door 1 side and the door frame 6 side can be prevented.

[0059] If, at a position on the rail 4 corresponding to the position of the anti-rebound roller 21 when the sliding door 1 is near its closed end, another recess (from that shown in Fig. 13B shown recess separately), it is possible to prevent the sliding door 1 from striking and rebounding with the door frame at the closed end of the sliding door 1.

[0060] In the first to fourth embodiments described above, the present invention is applied to a structural example of a sliding door 1 that mainly performs a linear movement along the straight rail 4. However, the present invention can also be applied to a sliding door that moves not straight but along an arcuate rail, or a sliding door that has a rail at its outer peripheral portion and is rotatable about a rotation axis.

[0061] Now, with reference to Fig. 14, a fifth embodiment of the rebound suppression system for a sliding door according to the present invention will be described. This embodiment illustrates an example in which the present invention is applied to a sliding door that moves along an arcuate rail.

[0062] In the rebound suppression system for a sliding door of the present embodiment, rollers 2 are provided on an arcuate sliding door 1, and an arcuate rail 4 is attached to an outer frame of the sliding door. Furthermore, as in the other embodiments, a rebound prevention roller 21 is held by a holding portion (not shown) fixed to the sliding door 1, and, like the other embodiments, is configured as a movable roller pressed against the rail 4 by a pressing portion. Furthermore, as in the other embodiments, the arcuate rail 4 is provided with two slant portions 41a and 41b inclined in mutually opposite directions.The same effect as in the other embodiments can be achieved in such a manner that the anti-rebound roller 21 fits into one of the inclined portions 41a and 42b, thereby pressing the sliding door 1 toward the innermost part of a door frame 6 or a door box 5. As for the structure of the arc-shaped sliding door 1, the rail 4 may be provided on the sliding door 1, while the rollers 2 are fixed to the outer frame of the sliding door, the anti-rebound roller 21 may be kept facing upward, and a recess like that shown in FIG. 1 may be provided in place of the inclined portions 41a and 42b of the rail 4. Fig. 12B shown.

[0063] Furthermore, with reference to Fig. 15, a sixth embodiment of the rebound suppression system for a sliding door according to the present invention will be described. This embodiment illustrates an example in which the present invention is applied to a sliding door that is rotatable about a rotation axis.

[0064] In the rebound suppression system for a sliding door of the present embodiment, a rebound prevention roller 21 moving along a semicircular rail 4 is provided at the distal end portion of a sliding door 1 rotatable about a rotation axis. As in the other embodiments, the rebound prevention roller 21 is configured as a movable roller pressed against the rail 4 by a pressing mechanism 8 held by a holding portion (not shown) attached to the sliding door. Furthermore, as in the other embodiments, the semicircular rail 4 is provided with two inclined portions 41a and 41b inclined in opposite directions to each other. Since the rebound prevention roller 21 is seated in one of the inclined portions 41a and 41b, the sliding door 1 can be prevented from striking a protective cover and rebounding forcefully.Furthermore, the sliding door 1 can be constructed by providing a recess 42 instead of the inclined portions 41a and 42 at a predetermined position on the rail 4 as shown in FIG. Fig. 13B, be kept at a predetermined position.

[0065] Although embodiments of the present invention have been described herein, the invention is not limited to the above-described embodiments, but can be appropriately modified and embodied in various forms.

[0066] Although in each of the above-described embodiments, the rebound preventing roller 21 is used as a rebound preventing mechanism, for example, a ball roller may alternatively be used as the rebound suppression system. Fig. 16A and Fig. 16B are views illustrating an example of the rebound suppression system using the ball roller. Fig. 16A is a view of the rebound suppression system for a sliding door in the direction of movement of the sliding door, and Fig. 16B is a view from the front surface side of the sliding door. In Fig. In Figure 16B, the sliding door has been omitted so that the internal structure is visible.

[0067] In the example of Fig. 16A and Fig. 16B, the rollers 2 are provided on the sliding door 1, and the rail 4 is fixed to the outer frame of the sliding door. Furthermore, the pressing mechanism 8 is held by the holding portion 9, which is fixed to the sliding door 9, and a ball roller 22 for preventing rebound is attached to the distal end of the pressing mechanism 8. Furthermore, the rail 4 is provided with two inclined portions 41a and 42b inclined in mutually opposite directions, as shown in Fig. 16B is shown.

[0068] Fig. 17A and Fig. 17B are views that reflect the Fig. 16A and Fig. 16B illustrate the rebound suppression system for a sliding door, with the sliding door 1 moved to its open end. Fig. 17A is a view of the rebound suppression system for a sliding door in the direction of movement of the sliding door, and Fig. 17B is a view from the front surface side of the sliding door. In Fig. In Figure 17B, the sliding door has been omitted so that the internal structure is visible.

[0069] When the sliding door 1 is at its open end, the Fig. As shown in Figure 17A, the ball roller 22 is inserted into the inclined portion 41b of the rail 4 for rebound prevention. Then, as in the first embodiment, the sliding door 4 is pressed by a counterforce from the inclined portion 41b toward the innermost part of the door frame, whereby the sliding door 1 can be prevented from rebounding. This also applies to the case where the sliding door 1 is at its open end.

[0070] Moreover, according to the above-described embodiments, the anti-rebound roller 21 is configured to fit into the inclined portion 41a or 41b or the recess 42 on the rail 4, thereby preventing the sliding door 1 from rebounding. However, the effect of the present invention can be achieved by providing an appropriate structure on the rail 4 into which the anti-rebound roller 21 is fitted, such as an opening portion or a pair of projections of an appropriate size, instead of the inclined portion 41a or 41b or the recess 42.

[0071] Furthermore, the pressing mechanism 8 for the rebound prevention roller 21 used in the present invention may be formed by such a structure that the unidirectional damper 82 ( Fig.3) is used to increase the pressing force against the rail 4 along with the operation of closing or opening the sliding door 1. In this case, the anti-rebound roller 21 is forcefully pressed against the inclined portion 41a or 41b only when the sliding door 1 is forcefully closed or opened, so that the sliding door 1 can be operated without any heavy load when the sliding door 1 is closed or opened at a normal speed.

[0072] In a conventional sliding door structure, rails for a sliding door are provided individually above and below the sliding door. However, the rebound suppression system for a sliding door of the present invention can be provided on one or each of the upper and lower rails, and furthermore, the rebound suppression system for a sliding door can be applied to another rail provided separately from the original sliding door rail.

[0073] Furthermore, according to the above-described embodiments, the sloped portions and the recess can be formed on the rail by pressing such that the surface of the rail in contact with the rollers is isolated from the outside and spatially separated from the rear surface. By doing this, the rebound suppression system for a sliding door can be protected even in an environment where chips and mist adhere to the rear surface of the rail.

[0074] Furthermore, in the embodiments described above, the sliding door is displaced along the rail using the rollers as support elements to assist the movement of the sliding door. Alternatively, the elements to assist the movement of the sliding door can be sliding elements that slide between the sliding door and the rail. In this way, a component including a transmission mechanism for moving the sliding door can be used as required.

[0075] In addition, the rollers and the ball roller as components of the rebound prevention mechanism may be replaced by a component comprising a similar transmission mechanism, a low-friction, wear-resistant metal or resin, and the like.

Claims

[1] Rebound suppression system for a sliding door (1), comprising: a sliding door (1); a rail (4); a movable holding portion (2) configured to move along the rail (4) in accordance with the opening and closing movement of the sliding door (1), having a first width perpendicular to the direction of movement and being in contact with a first surface of the rail (4); wherein the rail (4) has a fitting portion (41, 41a, 41b, 42) having a second width perpendicular to the movement direction which is smaller than the first width of the movable holding portion (2) and which is provided on at least a part of the rail (4), wherein the fitting portion (41, 41a, 41b, 42) is provided on the first surface of the rail (4); a rebound prevention unit (21, 22) having a third width perpendicular to the direction of movement which is smaller than the second width of the fitting portion (41, 41a, 41b, 42); and a pressing mechanism (8) designed to always press the rebound prevention unit (21, 22) against the first surface of the rail (4) and / or the fitting portion (41, 41a, 41b, 42), wherein the fitting portion (41, 41a, 41b, 42) is arranged at a position of the first surface of the rail (4) at which the rebound prevention unit (21, 22) is located in a closed position of the sliding door (1), and / or at a position of the rail (4) at which the rebound prevention unit (21, 22) is located in an open position of the sliding door (1); wherein the fitting portion (41, 41a, 41b, 42) is a V-shaped recess (42) in the rail (4), and wherein the recess (42) is formed by two oblique portions opposite one another in the direction of movement; and wherein, due to the fact that the first width of the movable holding portion (2) is greater than the second width of the fitting portion (41, 41a, 41b, 42), the movable holding portion (2) contacts the first surface of the rail (4), regardless of whether it is located in front of, behind or directly above the fitting portion (41, 41a, 41b, 42). [2] A rebound suppression system for a sliding door (1) according to claim 1, wherein the pressing mechanism (8) for the rebound preventing unit (21, 22) has a structure combining an elastic body and a unidirectional damper. [3] A rebound suppression system for a sliding door (1) according to any one of claims 1 or 2, wherein the movable support portion (2) is a roller adapted to roll on the rail (4). [4] A rebound suppression mechanism for a sliding door (1) according to any one of claims 1 or 2, wherein the movable support portion (2) is a sliding member adapted to slide on the rail (4). [5] A rebound suppression mechanism for a sliding door (1) according to any one of claims 1 to 4, wherein the rebound preventing unit (21) is a roller. [6] A rebound suppression mechanism for a sliding door (1) according to any one of claims 1 to 4, wherein the rebound preventing unit (22) is a ball roller. [7] A rebound suppression mechanism for a sliding door (1) according to any one of claims 1 to 6, wherein a counter force is generated which presses the sliding door (1) toward the outer frame (6) when the pressing mechanism (8) presses the rebound preventing unit (21, 22) against the fitting portion (41, 41a, 41b).

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