Two-axis opening and closing device

Abstract

To provide a two-shaft opening and closing tool which facilitates the opening and closing operation of a door. [Solution] A two-shaft opening / closing device 1 includes an arm 10, a first shaft 8 and a second shaft 9 attached to the arm 10, a first attachment 6 rotatable relative to the arm 10 via the first shaft 8 and fixed to the door 4, the first attachment 6 having a first abutment surface 6A facing the first shaft 8, a second attachment 7 rotatable relative to the arm 10 via the second shaft 9 and fixed to the frame 3, and a rotation restricting block 11 having a first rotation restricting surface 11A that prevents rotation of the first attachment 6 relative to the arm 10 by abutting against the first abutment surface 6A and that is movable between a position where the first rotation restricting surface 11A abuts against the first abutment surface 6A and a position where it does not abut. When the door 4 closes the opening 2, the rotation restricting block 11 is sandwiched between the first attachment 6 and the second attachment 7, and the first rotation restricting surface 11A abuts against the first abutment surface 6A.

Description

[Technical field]

[0001] This specification discloses a dual axis opening and closing tool. [Background technology]

[0002] A two-axis hinge with two rotation axes, a first axis and a second axis, is sometimes used to open and close a door. With a two-axis hinge, it is not clear which of the first axis or the second axis the door will rotate around first, so the opening and closing action of the door can easily become unstable.

[0003] Japanese Patent Application Laid-Open Publication No. 58-65883 discloses an improved biaxial hinge. In this biaxial hinge, one end of the hinge body is pivotally supported by a first support shaft to a frame-side mounting member, and the other end is rotatably held by a second support shaft to a door mounting member. A coil spring is wound around the second support shaft, and the coil spring biases the door toward the hinge body. In this biaxial hinge, after the hinge body rotates with respect to the frame-side mounting portion, the door mounting member rotates with respect to the hinge body against the biasing force of the coil spring. In this biaxial hinge, the order of rotation around the first support shaft and the second support shaft is fixed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 58-65883 Summary of the Invention [Problem to be solved by the invention]

[0005] In this biaxial hinge, a force against the biasing force of the coil spring is required to open and close the door. The biasing force of the coil spring impairs the ease of opening and closing the door. In particular, for heavy doors, it is necessary to use a coil spring with a large biasing force. A biaxial hinge using a coil spring with a large biasing force requires a large force to open and close the door. This biaxial hinge impairs the ease of opening and closing the door.

[0006] The applicant's intention is to provide a two-axis opening and closing device that allows easy and stable opening and closing of a door. [Means for solving the problem]

[0007] The biaxial opening and closing device disclosed in this specification is a biaxial opening and closing device that connects a door that opens and closes an opening to a frame. an arm spanning the door and the frame; A first shaft attached to the arm; a second shaft attached to the arm and spaced apart from the first shaft in one direction; a first attachment attached to the first shaft, rotatable relative to the arm via the first shaft, and fixed to the door, the first attachment having a first abutment surface facing the first shaft; a second attachment to which the second shaft is attached, the second attachment being rotatable relative to the arm via the second shaft and fixed to the frame; and The arm is provided with a rotation control block having a first rotation control surface that prevents the first attachment from rotating relative to the arm by abutting against the first abutment surface of the first attachment, and is located between the first attachment and the second attachment and is movable between a position where the first rotation control surface abuts against the first abutment surface and a position where it does not abut. In this biaxial opening / closing device, when the door is in a state where the opening is closed, the rotation restriction block is sandwiched between the first attachment and the second attachment, and the first rotation restriction surface is abutted against the first abutment surface. Effect of the Invention

[0008] This biaxial opening / closing device prevents the first attachment from rotating relative to the arm when the door is in a closed state. When the door is opened from a state in which the door is closed, the arm rotates relative to the second attachment before the first attachment rotates relative to the arm. This biaxial opening / closing device makes the operation of opening and closing the door easy and stable. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a deck of a ship in which a twin-shaft opening and closing device according to one embodiment is used. [Diagram 2] 2A is a cross-sectional view of the biaxial opening and closing tool taken along line segment IIA-IIA in FIG. 1, and FIG. 2B is a cross-sectional view of the biaxial opening and closing tool taken along line segment IIB-IIB in FIG. [Diagram 3] FIG. 3 is a cross-sectional view of the biaxial opening / closing device taken along line III-III in FIG. [Figure 4] FIG. 4A is an explanatory diagram showing the biaxial opening and closing device of FIG. 1 in a used state, FIG. 4B is an explanatory diagram showing another used state of the biaxial opening and closing device of FIG. 1, and FIG. 4C is an explanatory diagram showing yet another used state of the biaxial opening and closing device of FIG. 1. [Diagram 5] 5A is an explanatory diagram showing yet another state of use of the biaxial opening and closing device of FIG. 1, FIG. 5B is an explanatory diagram showing yet another state of use of the biaxial opening and closing device of FIG. 1, and FIG. 5C is an explanatory diagram showing yet another state of use of the biaxial opening and closing device of FIG. 1. [Figure 6] 6A is an explanatory diagram showing yet another state of use of the biaxial opening and closing device of FIG. 1, FIG. 6B is an explanatory diagram showing yet another state of use of the biaxial opening and closing device of FIG. 1, and FIG. 6C is an explanatory diagram showing yet another state of use of the biaxial opening and closing device of FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, preferred embodiments will be described in detail with reference to the drawings as appropriate.

[0011] FIG 1 shows a part of a deck 1 of a ship. A frame 3 having an opening 2 is attached and embedded in the deck 1. FIG 1 shows a state in which a door 4 closes the opening 2. A pair of biaxial opening and closing devices 5 are attached to the frame 3 and the door 4. The pair of biaxial opening and closing devices 5 allow the door 4 to rotate relative to the frame 3. The opening 2 can be opened and closed by rotating the door 4. In FIG 1, a surface 3A of the frame 3 and a surface 4A of the door 4 are on the same plane as a surface 1A of the deck 1.

[0012] 2A shows a cross section of the dual-axis opening / closing device 5 taken along line IIA-IIA in FIG. 1, together with cross sections of a portion of the frame 3 and the door 4. The door 4 has a chamfer 4B on an edge facing the opening 2 of the frame 3. The double-headed arrow G in FIG. 2A indicates the size of the gap between the frame 3 and the door 4.

[0013] The biaxial opening / closing device 5 includes a first attachment 6 attached to the door 4, and a second attachment 7 attached to the frame 3. The first attachment 6 is fixed to the door 4. The method of fixing the first attachment 6 is not particularly limited. The first attachment 6 may be integrally molded with the door 4. The second attachment 7 is fixed to the frame 3. The method of fixing the second attachment 7 is not particularly limited. The second attachment 7 may be integrally molded with the frame 3.

[0014] The dual-shaft opening / closing device 5 has a first shaft 8 attached to a first attachment 6. The first attachment 6 has a first abutment surface 6A facing the first shaft 8 and a first pressing surface 6B facing the first shaft 8 closer to the first shaft 8 than the first abutment surface 6A. The first abutment surface 6A and the first pressing surface 6B are perpendicular to each other. The first abutment surface 6A is perpendicular to the front surface 4A of the door 4.

[0015] The two-shaft opening / closing device 5 has a second shaft 9 attached to a second attachment 7. The second attachment 7 has a second abutment surface 7A facing the second shaft 9 and a second pressing surface 7B facing the second shaft 9 closer to the second shaft 9 than the second abutment surface 7A. The second abutment surface 7A and the second pressing surface 7B are perpendicular to each other. The second abutment surface 7A is parallel to the surface 3A of the frame 3.

[0016] 2B shows a cross section of the dual-shaft opening / closing device 5 taken along line segment IIB-IIB in FIG. 1, together with cross sections of a portion of the frame 3 and the door 4. The dual-shaft opening / closing device 5 includes an arm 10 to which a first shaft 8 and a second shaft 9 are attached. The second shaft 9 is located away from the first shaft 8 in one direction. The first attachment 6 is rotatable relative to the arm 10 via the first shaft 8. The second attachment 7 is rotatable relative to the arm 10 via the second shaft 9. The arm 10 spans between the door 4 and the frame 3. The door 4 is rotatable relative to the frame 3 by the first shaft 8, the second shaft 9, and the arm 10.

[0017] 3 shows a cross section of the biaxial opening / closing device 5 taken along line III-III in FIG. 1, together with cross sections of parts of the frame 3 and the door 4. As shown in FIG. 3, the biaxial opening / closing device 5 includes a rotation restriction block 11 that is sandwiched between the first attachment 6 and the second attachment 7 in the usage state shown in FIG. 1. The rotation restriction block 11 is sandwiched between the first contact surface 6A of the first attachment 6 and the second pressing surface 7B of the second attachment 7.

[0018] The rotation restricting block 11 has a first rotation restricting surface 11A that abuts against the first attachment 6 and a second rotation restricting surface 11B that abuts against the second attachment 7. In Fig. 3, the first rotation restricting surface 11A abuts against the first abutment surface 6A. The second rotation restricting surface 11B abuts against the second pressing surface 7B.

[0019] The rotation restricting block 11 has a first elongated hole 11C through which the first shaft 8 passes. The longitudinal direction of the first elongated hole 11C is the direction in which the first shaft 8 and the second shaft 9 are aligned. The rotation restricting block 11 has a second elongated hole 11D through which the second shaft 9 passes. The longitudinal direction of the second elongated hole 11D is the direction in which the first shaft 8 and the second shaft 9 are aligned.

[0020] The rotation restricting block 11 has a protrusion 11E that protrudes in a direction away from the second shaft 9. The protrusion 11E is located at the end of the second rotation restricting surface 11B. The rotation restricting block 11 has a first chamfer 11F adjacent to the first rotation restricting surface 11A and a second chamfer 11G adjacent to the second rotation restricting surface 11B.

[0021] The first chamfer 11F has a shape that does not interfere with the first attachment 6 that rotates between an orientation in which the first rotation restricting surface 11A faces the first abutting surface 6A of the first attachment 6 and an orientation in which the first rotation restricting surface 11A faces the first pressing surface 6B. This first chamfer 11F has an R-chamfer shape with a predetermined radius.

[0022] The second chamfer 11G has a shape that prevents the second attachment 7, which rotates between an orientation in which the second rotation restricting surface 11B faces the second abutting surface 7A of the second attachment 7 and an orientation in which the second rotation restricting surface 11B faces the second pressing surface 7B, from interfering with the rotation restricting block 11. This second chamfer 11G has a shape in which a part of the outer circumferential surface is removed from the R-chamfered shape of a predetermined radius. As shown in Fig. 3, in this rotation restricting block 11, a part of the thickness between the second elongated hole 11D and the second chamfer 11G is smaller than the thickness between the second elongated hole 11D and the R-chamfered shape of the predetermined radius.

[0023] 4A shows a usage state in which the door 4 is opened, as compared to the usage state in FIG. 3. The arm 10 and the rotation restriction block 11 rotate in a direction to open the door 4 relative to the second attachment 7. The protrusion 11E of the rotation restriction block 11 abuts against the second abutment surface 7A of the second attachment 7. The second chamfer 11G abuts against the second pressing surface 7B. The first rotation restriction surface 11A abuts against the first abutment surface 6A of the first attachment 6. The rotation restriction block 11 is sandwiched between the first abutment surface 6A of the first attachment 6 and the second attachment 7.

[0024] Fig. 4B shows a usage state in which the door 4 is further opened compared to the usage state in Fig. 4A. The arm 10 and the rotation restriction block 11 rotate in a direction to further open the door 4 relative to the second attachment 7. The protrusion 11E of the rotation restriction block 11 abuts against the second abutment surface 7A of the second attachment 7. The first rotation restriction surface 11A abuts against the first abutment surface 6A of the first attachment 6. A gap GA is provided between the second chamfer 11G and the second pressing surface 7B of the second attachment 7.

[0025] Fig. 4C shows a usage state in which the door 4 is further opened compared to the usage state in Fig. 4B. The arm 10 and the rotation restriction block 11 rotate relative to the second attachment 7 in a direction to further open the door 4. The rotation restriction block 11 moves relative to the arm 10 in a direction approaching the second attachment 7. The protrusion 11E of the rotation restriction block 11 abuts against the second abutment surface 7A of the second attachment 7. Furthermore, the first attachment 6 rotates relative to the arm 10 and the rotation restriction block 11. The first abutment surface 6A is away from the first rotation restriction surface 11A.

[0026] FIG. 5A shows a usage state in which the door 4 is further opened compared to the usage state in FIG. 4C. The arm 10 and the rotation restriction block 11 rotate relative to the second attachment 7 in a direction to further open the door 4. The rotation restriction block 11 moves relative to the arm 10 in a direction to further approach the second attachment 7. The protrusion 11E of the rotation restriction block 11 abuts against the second abutment surface 7A of the second attachment 7. The second chamfer 11G abuts against the second pressing surface 7B of the second attachment 7. The first attachment 6 rotates further relative to the arm 10 and the rotation restriction block 11. The first abutment surface 6A is further away from the first rotation restriction surface 11A. The first chamfer 11F abuts against the first pressing surface 6B.

[0027] Fig. 5B shows a usage state in which the door 4 is further opened compared to the usage state in Fig. 5A. The arm 10 and the rotation restriction block 11 rotate relative to the second attachment 7 in a direction to further open the door 4. The rotation restriction block 11 moves relative to the arm 10 in a direction to further approach the second attachment 7. The protrusion 11E of the rotation restriction block 11 abuts against the second abutment surface 7A of the second attachment 7. The second chamfer 11G abuts against the second pressing surface 7B of the second attachment 7. The first attachment 6 rotates further relative to the arm 10 and the rotation restriction block 11. The first chamfer 11F abuts against the first pressing surface 6B.

[0028] FIG. 5C shows a usage state in which the door 4 is further opened compared to the usage state of FIG. 5B. Compared to the usage state of FIG. 5B, the arm 10 and the rotation restriction block 11 have rotated further relative to the second attachment 7 in a direction to open the door 4. The rotation restriction block 11 has moved further relative to the arm 10. The second rotation restriction surface 11B of the rotation restriction block 11 abuts against the second abutment surface 7A of the second attachment 7. The first attachment 6 has rotated further relative to the arm 10 and the rotation restriction block 11. The first pressing surface 6B abuts against the first rotation restriction surface 11A. FIG. 5C shows a fully open state of the door 4. Compared to the usage state of FIG. 3, this door 4 has rotated 180 degrees or more. The arm 10 and the rotation restriction block 11 have rotated 90 degrees compared to the usage state of FIG. 3.

[0029] Fig. 6A shows a usage state in which the door 4 has been rotated in a closing direction relative to the usage state in Fig. 5C. The first attachment 6 has rotated in a closing direction relative to the arm 10 and the rotation restricting block 11. The second rotation restricting surface 11B of the rotation restricting block 11 is in contact with the second abutment surface 7A of the second attachment 7. The first rotation restricting surface 11A of the rotation restricting block 11 and the first pressing surface 6B of the first attachment 6 are spaced apart. The first rotation restricting surface 11A faces the first abutment surface 6A of the first attachment 6 at a distance.

[0030] Fig. 6B shows a usage state in which the door 4 is further closed in addition to the usage state in Fig. 6A. The arm 10 and the rotation restriction block 11 rotate in a direction to close the door 4 relative to the second attachment 7. The protrusion 11E of the rotation restriction block 11 abuts against the second abutment surface 7A of the second attachment 7. The second chamfer 11G abuts against the second pressing surface 7B of the second attachment 7. The rotation restriction block 11 moves relative to the arm 10 in a direction in which the second rotation restriction surface 11B moves away from the second abutment surface 7A of the second attachment 7.

[0031] 6C shows a usage state in which the door 4 is further closed compared to the usage state in FIG. 6B. The arm 10 and the rotation restriction block 11 rotate further relative to the second attachment 7 in a direction to close the door 4. The protrusion 11E of the rotation restriction block 11 abuts against the second abutment surface 7A of the second attachment 7. The second chamfer 11G abuts against the second pressing surface 7B of the second attachment 7. The rotation restriction block 11 moves relative to the arm 10 in a direction in which the second rotation restriction surface 11B moves further away from the second abutment surface 7A of the second attachment 7. The first rotation restriction surface 11A of the rotation restriction block 11 abuts against the first abutment surface 6A of the first attachment 6.

[0032] Now, the opening and closing operation of the door 4 will be described with reference to FIGS.

[0033] In the operation of opening the door 4, the door 4 is rotated from the closed state of the door 4 in FIG. 3 in the direction in which the door 4 opens. The door 4 rotates together with the arm 10 around the second shaft 9 as the rotation center, and the biaxial opening / closing device 5 is in the use state of FIG. 4A. The door 4 is further rotated in the direction in which the door 4 opens. The door 4 rotates together with the arm 10 around the second shaft 9 as the rotation center, and the biaxial opening / closing device 5 is in the use state of FIG. 4B. As shown in FIG. 4B, a gap GA is generated between the second chamfer 11G of the rotation restriction block 11 and the second pressing surface 7B of the second attachment 7. Due to the generation of this gap GA, the rotation restriction block 11 rotates together with the arm 10 while moving in a direction approaching the second pressing surface 7B relative to the arm 10. The door 4 rotates together with the arm 10 and further rotates relative to the arm 10, and the biaxial opening / closing device 5 is in the use state of FIG. 4C. The door 4 is further rotated in the direction in which the door 4 opens, and the rotation restriction block 11 rotates while moving further. The door 4 rotates together with the arm 10 and also rotates relative to the arm 10, and the biaxial opening / closing device 5 is in the use state of FIG. 5A. The door 4 is further rotated in the opening direction, and the rotation restriction block 11 rotates while moving further. The door 4 rotates together with the arm 10 and also rotates relative to the arm 10, and the biaxial opening / closing device 5 is in the use state of FIG. 5B. The door 4 is further rotated in the opening direction, and the rotation restriction block 11 rotates while moving further. The door 4 rotates together with the arm 10 and also rotates relative to the arm 10, and the biaxial opening / closing device 5 is in the use state of FIG. 5C.

[0034] In the closing operation of the door 4, the door 4 is rotated in a closing direction from the use state of FIG. 5C, and the door 4 rotates relative to the arm 10 and the rotation restriction block 11. The rotation of the door 4 places the two-axis opening / closing device 5 in the use state of FIG. 6A. The door 4 is further closed, and the arm 10 and the rotation restriction block 11 rotate together with the door 4 relative to the second attachment 7. As the rotation restriction block 11 rotates, the protrusion 11E abuts against the second abutment surface 7A of the second attachment 7. As the protrusion 11E abuts against the second abutment surface 7A, the rotation restriction block 11 rotates while moving relative to the arm 10, and is placed in the use state of FIG. 6B. The door 4 is further closed, and the arm 10 and the rotation restriction block 11 rotate together with the door 4 relative to the second attachment 7. As the protrusion 11E abuts against the second abutment surface 7A, the rotation restriction block 11 rotates while moving further relative to the arm 10, and is placed in the use state of FIG. 6C. Further, the door 4 is closed to close the opening 2, and the device is put into the use state shown in FIG.

[0035] 3, when the door 4 is closed, the first rotation restricting surface 11A of the rotation restricting block 11 abuts against the first abutment surface 6A of the first attachment 6. This prevents the first attachment 6 from rotating relative to the arm 10. Therefore, when the door 4 is rotated in an opening direction from a closed state, the arm 10 rotates relative to the second attachment 7 before the first attachment 6 rotates relative to the arm 10. In this biaxial opening / closing device 5, the order of rotation of the door 4 relative to the arm 10 and rotation of the arm 10 relative to the second attachment 7 is constant when the door 4 is opened.

[0036] As shown in FIG. 3, when the door 4 closes the opening 2, the biaxial opening / closing device 5 abuts the rotation restriction block 11 against the second pressing surface 7B. On the other hand, as shown in FIG. 5C, when the door 4 is fully open, the biaxial opening / closing device 5 abuts the rotation restriction block 11 against the second abutment surface 7A. The biaxial opening / closing device 5 allows the rotation restriction block 11 to move in a direction approaching the second attachment 7 by facing the rotation restriction block 11 against the second abutment surface 7A. The biaxial opening / closing device 5 allows the first rotation restriction surface 11A to move to a position away from the first abutment surface 6A of the first attachment 6. As a result, the door 4 and the first attachment 6 rotate relative to the arm 10, and the first pressing surface 6B abuts against the rotation restriction block 11. From the viewpoint of allowing the door 4 to rotate relative to the arm 10, it is preferable to abut the rotation restriction block 11 against the second abutment surface 7A. 5C, the first pressing surface 6B of the first attachment 6 is in contact with the rotation restriction block 11. The arm 10 cannot rotate relative to the second attachment 7 unless the door 4 rotates in the closing direction and the first pressing surface 6B separates from the rotation restriction block 11. As a result, when the door 4 rotates in the closing direction, the door 4 is rotated relative to the arm 10 before the arm 10 rotates relative to the second attachment 7. When the door 4 is closed, the order of rotation of the door 4 relative to the arm 10 and rotation of the arm 10 relative to the second attachment 7 is constant. Therefore, it is preferable that the two-axis opening / closing device 5 sandwiches the rotation restriction block 11 between the first attachment 6 and the second contact surface 7A.

[0037] However, the biaxial opening / closing device 5 is not limited to one in which the rotation restriction block 11 is sandwiched between the first attachment 6 and the second abutment surface 7A. The biaxial opening / closing device 5 only needs to position the rotation restriction block 11 between the first attachment 6 and the second abutment surface 7A when the door 4 is fully open. The rotation restriction block 11 only needs to be able to abut against the second abutment surface 7A. This allows the biaxial opening / closing device 5 to move the rotation restriction block 11 in a direction approaching the second attachment 7. By moving the rotation restriction block 11 in a direction approaching the second attachment 7, the biaxial opening / closing device 5 can move the first rotation restriction surface 11A to a position away from the first abutment surface 6A of the first attachment 6, and the door 4 can be rotated relative to the arm 10.

[0038] As shown in FIG. 4A, the second chamfer 11G of the rotation restriction block 11 abuts against the second pressing surface 7B until the door 4 rotates in the opening direction by a predetermined angle. This abutment prevents the rotation restriction block 11 from moving in the direction approaching the second attachment 7 relative to the arm 10. This maintains the state in which the first rotation restriction surface 11A abuts against the first abutment surface 6A, preventing the first attachment 6 and the door 4 from rotating. This two-axis opening / closing device 5 can prevent the door 4 from rotating relative to the arm 10 until the door 4 is sufficiently separated from the opening 2. From this viewpoint, it is preferable that the rotation restriction block 11 has the second chamfer 11G that abuts against the second pressing surface 7B until the door 4 rotates in the opening direction by a predetermined angle from the state in which the opening 2 is closed.

[0039] As shown in FIG. 4B, when the door 4 is further opened from the use state of FIG. 4A, a gap GA is generated between the second chamfer 11G of the rotation restriction block 11 and the second pressing surface 7B. As shown in FIG. 4C, the rotation restriction block 11 rotates by the amount of the gap GA, and moves toward the second attachment 7 relative to the arm 10. The rotation restriction block 11 moves to a position where the first rotation restriction surface 11A is separated from the first abutment surface 6A. The door 4 and the first attachment 6 rotate in the opening direction relative to the arm 10 and the rotation restriction block 11 by the amount where the first rotation restriction surface 11A is separated from the first abutment surface 6A. From this viewpoint, it is preferable that the second chamfer 11G has a shape that allows the rotation restriction block 11 to move toward the second attachment 7 relative to the arm 10 by rotating the door 4 further in the opening direction from a state where the door 4 has rotated in the opening direction by a predetermined angle.

[0040] As shown in FIG. 5C, when the door 4 is fully opened, the biaxial opening / closing device 5 sandwiches the rotation restriction block 11 between the first pressing surface 6B of the first attachment 6 and the second abutment surface 7A of the second attachment 7. When the first pressing surface 6B is in contact with the rotation restriction block 11, the second rotation restriction surface 11B of the rotation restriction block 11 is maintained in contact with the second abutment surface 7A. The second abutment surface 7A is farther from the second shaft 9 than the second pressing surface 7B. When the door 4 is fully opened, the second rotation restriction surface 11B is brought into contact with the second abutment surface 7A, thereby suppressing the rotation of the arm 10 relative to the second attachment 7. In this biaxial opening / closing device 5, the arm 10 can be prevented from rotating relative to the second attachment 7 due to the action of an unintended external force.

[0041] In the biaxial opening / closing device 5, as the first attachment 6 rotates, the first pressing surface 6B comes into contact with the rotation restriction block 11, moving the rotation restriction block 11 toward the second attachment 7. Note that the biaxial opening / closing device 5 is not limited to a structure in which the first attachment 6 moves the rotation restriction block 11 toward the second attachment 7. The biaxial opening / closing device 5 may have a structure in which the rotation restriction block 11 is manually moved directly between a position where the second rotation restriction surface 11B abuts against the second abutment surface 7A of the second attachment 7 and a position where it does not abut.

[0042] As shown in Fig. 6A to Fig. 6C, the rotation restriction block 11 has a protrusion 11E that abuts against the second abutment surface 7A of the second attachment 7 by rotating in the closing direction from a position where it abuts against the second abutment surface 7A of the second attachment 7. With this rotation, the protrusion 11E moves the rotation restriction block 11 away from the second abutment surface 7A and toward the first attachment 6. By rotating in the direction to close the door 4, the biaxial opening / closing device 5 can move the rotation restriction block 11 in a direction in which the second rotation restriction surface 11B moves away from the second abutment surface 7A of the second attachment 7 and the first rotation restriction surface 11A moves toward the first abutment surface 6A of the first attachment 6. From this viewpoint, in the biaxial opening / closing device 5, it is preferable that the rotation restriction block 11 has a protrusion 11E.

[0043] In the biaxial opening / closing device 5, the rotation restriction block 11 is not limited to having the protrusion 11E. It is sufficient that the rotation restriction block 11 is movable in a direction approaching the first attachment 6 from the second attachment 7. The biaxial opening / closing device 5 may have a structure in which the rotation restriction block 11 is directly moved manually to a position where the second contact surface 7A of the second attachment 7 is separated from the second rotation restriction surface 11B.

[0044] This rotation restriction block 11 has a first elongated hole 11C through which the first shaft 8 is movably passed and a second elongated hole 11D through which the second shaft 9 is movably passed. The two-axis opening / closing device 5 has a simple structure and holds the rotation restriction block 11 rotatably together with the arm 10 and movably relative to the arm 10. Note that in the two-axis opening / closing device 5, it is only necessary that the rotation restriction block 11 is rotatable together with the arm 10 and movable relative to the arm 10, and the holding structure of the rotation restriction block 11 is not particularly limited.

[0045] 2A, the biaxial opening / closing device 5 requires a gap G to prevent interference in order to rotate the door 4 relative to the frame 3. In this biaxial opening / closing device 5, the arm 10 rotates relative to the second attachment 7 before the first attachment 6 rotates relative to the arm 10. When opening the door 4, the arm 10 rotates relative to the frame 3 before the door 4 rotates relative to the arm 10. This biaxial opening / closing device 5 can reduce this gap G. Since the door 4 has a chamfer 4B, this biaxial opening / closing device 5 can further reduce the gap G.

[0046] Here, the biaxial opening / closing device 5 is used on the deck 1 of a ship, but the application of the biaxial opening / closing device 5 is not limited thereto. For example, the biaxial opening / closing device 5 is used for various applications for closing openings, such as doors for buildings and furniture, covers for underground structures such as manholes, and covers for underfloor storage.

[0047] [Disclosure items] Each of the following sections discloses a preferred embodiment.

[0048] [Item 1] A two-axis opening and closing device that connects a door that opens and closes an opening to a frame, an arm spanning the door and the frame; A first shaft attached to the arm; a second shaft attached to the arm and spaced apart from the first shaft in one direction; a first attachment attached to the first shaft, rotatable relative to the arm via the first shaft, and fixed to the door, the first attachment having a first abutment surface facing the first shaft; a second attachment to which the second shaft is attached, the second attachment being rotatable relative to the arm via the second shaft and fixed to the frame; and a rotation restricting block having a first rotation restricting surface that abuts against the first abutment surface of the first attachment to prevent the first attachment from rotating relative to the arm, the rotation restricting block being located between the first attachment and the second attachment and being movable between a position where the first rotation restricting surface abuts against the first abutment surface and a position where it does not abut against the first abutment surface; Equipped with A two-axis opening / closing device, in a state in which the door closes the opening, the rotation restriction block is sandwiched between the first attachment and the second attachment, and the first rotation restriction surface is abutted against the first abutment surface.

[0049] [Item 2] the second attachment has a second abutment surface facing the second shaft and a second pressing surface facing the second shaft closer to the second shaft than the second abutment surface, When the door is in a state where the opening is closed, the rotation restriction block is sandwiched between the first attachment and the second pressing surface of the second attachment, 2. The biaxial opening / closing device according to item 1, wherein the rotation restriction block is positioned between the first attachment and the second abutment surface of the second attachment when the door is in a fully open state.

[0050] [Item 3] the first attachment has a first pressing surface facing the first axis and closer to the first axis than the first abutment surface; 3. The biaxial opening / closing device according to item 2, wherein, in a fully open state of the door, the rotation restriction block is sandwiched between the first pressing surface of the first attachment and the second abutment surface of the second attachment.

[0051] [Item 4] Item 4. The biaxial opening / closing device according to item 3, wherein by rotating the first attachment relative to the arm in a direction to open the door, the first pressing surface of the first attachment comes into contact with the rotation restriction block, and the first attachment moves the rotation restriction block toward the second attachment.

[0052] [Item 5] 5. The biaxial opening / closing device according to any one of items 2 to 4, wherein the rotation restriction block has a protrusion that abuts against the second abutment surface by rotating in a closing direction from a position abutting the second abutment surface to move the rotation restriction block away from the second abutment surface in a direction toward the first attachment.

[0053] [Item 6] The rotation restricting block has a second rotation restricting surface that abuts against the second attachment, 6. The biaxial opening / closing device according to any one of items 2 to 5, wherein, when the door is in a fully open state, the rotation restriction block is movable to a position where the second rotation restriction surface abuts against the second abutment surface of the second attachment.

[0054] [Item 7] The biaxial opening and closing device according to any one of items 2 to 6, wherein the rotation restriction block has a second chamfer that abuts against the second pressing surface of the second attachment until the door rotates by a predetermined angle from a state in which the door closes the opening.

[0055] [Item 8] 8. The two-axis opening and closing device according to item 7, wherein the second chamfer has a shape that allows the rotation restriction block to move in a direction approaching the second attachment relative to the arm when the second chamfer rotates beyond the predetermined angle in a direction in which the door opens.

[0056] [Item 9] 9. The biaxial opening / closing device according to any one of items 1 to 8, wherein the rotation restriction block has a first long hole through which the first shaft is passed so as to be movable in the one direction, and a second long hole through which the second shaft is passed so as to be movable in the one direction. [Explanation of symbols]

[0057] 2...Aperture 3. Frame 4. Door 5. Dual-axis opening and closing device 6. First attachment 6A...First contact surface 6B: First pressing surface 7. Second attachment 7A...Second contact surface 7B: Second pressing surface 8...first axis 9...Second axis 10. Arm 11 Rotation control block 11A First rotation restriction surface 11B...Second rotation restriction surface 11C...First long hole 11D...Second long hole 11E...Protrusion 11F: First chamfer 11G Second chamfer

Claims

1. A two-axis opening and closing device that connects a door that opens and closes an opening to a frame, an arm spanning the door and the frame; A first shaft attached to the arm; a second shaft attached to the arm and spaced apart from the first shaft in one direction; a first attachment attached to the first shaft, rotatable relative to the arm via the first shaft, and fixed to the door, the first attachment having a first abutment surface facing the first shaft; a second attachment to which the second shaft is attached, the second attachment being rotatable relative to the arm via the second shaft and fixed to the frame; and a rotation restricting block having a first rotation restricting surface that abuts against the first abutment surface of the first attachment to prevent the first attachment from rotating relative to the arm, the rotation restricting block being located between the first attachment and the second attachment and being movable between a position where the first rotation restricting surface abuts against the first abutment surface and a position where it does not abut against the first abutment surface; Equipped with A two-axis opening / closing device, in a state in which the door closes the opening, the rotation restriction block is sandwiched between the first attachment and the second attachment, and the first rotation restriction surface is abutted against the first abutment surface.

2. the second attachment has a second abutment surface facing the second shaft and a second pressing surface facing the second shaft closer to the second shaft than the second abutment surface, When the door is in a state where the opening is closed, the rotation restriction block is sandwiched between the first attachment and the second pressing surface of the second attachment, The dual-axis opening / closing device according to claim 1 , wherein the rotation restricting block is positioned between the first attachment and the second contact surface of the second attachment when the door is in a fully open state.

3. the first attachment has a first pressing surface facing the first axis and closer to the first axis than the first abutment surface; The two-shaft opening / closing device according to claim 2 , wherein the rotation restriction block is sandwiched between the first pressing surface of the first attachment and the second abutment surface of the second attachment when the door is in a fully open state.

4. The biaxial opening / closing device according to claim 2 or 3, wherein the rotation restriction block has a protrusion that abuts against the second abutment surface when rotated in a closing direction from a position abutting the second abutment surface, thereby moving the rotation restriction block away from the second abutment surface in a direction toward the first attachment.

Images