Traction device unit

Abstract

A pulling device unit is a pulling device unit assembled to a frame and a sliding door that is openably and closably assembled to the frame, and includes a receiving seat assembled to one of the frame and the sliding door, a main body assembled to the other of the frame and the sliding door, and an arm rotatably assembled to the main body, engaged with the receiving seat and pulling the sliding door to a closing side, one of the main body and the arm having a torque generating mechanism that generates a rotational torque that rotates the arm to a direction of pulling the sliding door to the closing side, a rotational range in which the arm rotates being divided into a torque non-generating range in which the rotational torque is not generated and a torque generating range in which the rotational torque is generated.

Description

Technical Field

[0001] This disclosure relates to a traction device unit. This application claims priority based on Japanese Patent Application No. 2023-203198, filed on November 30, 2023, the contents of which are incorporated herein by reference. Background Technology

[0002] A known pulling device unit for pulling a swing door of a building or furniture to a closed position is described (Patent Document 1, Patent Document 2). The pulling device unit comprises: a pulling device, mounted on one side of the frame and the swing door; and a receiving seat, mounted on the other side of the frame and the swing door. The pulling device has an arm that rotates to pull the receiving seat. The arm engages with the receiving seat, pulling the receiving seat and thereby pulling the swing door to the closed position.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Publication No. 6732397

[0006] Patent Document 2: Japanese Patent Publication No. 5297554 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, for traction device units, smaller size and greater ease of construction are ideal.

[0009] In view of the above, the purpose of this disclosure is to provide a smaller and more workable traction device unit.

[0010] Solution for solving the problem

[0011] To address the aforementioned issues, this disclosure proposes the following solutions.

[0012] The first embodiment of this disclosure discloses a pulling device unit that is mounted on a frame and a swing door that is openable and closable on the frame. It comprises: a receiving seat mounted on one side of the frame and the swing door; a main body mounted on the other side of the frame and the swing door; and an arm rotatably mounted on the main body, engaging with the receiving seat to pull the swing door toward the closing side. One of the main body and the arm has a torque generating mechanism that generates rotational torque. The rotational torque causes the arm to rotate in the direction that pulls the swing door toward the closing side. The rotation range of the arm is divided into: a torque-free range, where no rotational torque is generated; and a torque-generating range, where the rotational torque is generated.

[0013] Invention Effects

[0014] The traction device unit disclosed herein is more compact and easier to construct. Attached Figure Description

[0015] Figure 1 This is a perspective view showing the traction device unit of the first embodiment.

[0016] Figure 2 This is an exploded view of the traction device of the traction device unit.

[0017] Figure 3 This is a three-dimensional view of the support seat of the traction device unit.

[0018] Figure 4 This is a perspective view of the pulling device unit of a swing door assembled on the left door hinge.

[0019] Figure 5 This is a three-dimensional diagram showing the action of the pulling device pulling the swing door towards the closed position.

[0020] Figure 6 This is a three-dimensional diagram showing the action of the pulling device pulling the swing door towards the closed position.

[0021] Figure 7 This is a three-dimensional diagram showing the action of the pulling device pulling the swing door towards the closed position.

[0022] Figure 8 This is a three-dimensional diagram showing the action of the pulling device pulling the swing door towards the closed position.

[0023] Figure 9 Is with Figure 5 A cross-sectional view of the arm of the corresponding traction device.

[0024] Figure 10 Is with Figure 6 The corresponding sectional view of that arm.

[0025] Figure 11 Is with Figure 7 The corresponding sectional view of that arm.

[0026] Figure 12 Is with Figure 8 The corresponding sectional view of that arm.

[0027] Figure 13 It is a graph showing the relationship between the arm angle and the rotational torque.

[0028] Figure 14 This is a cross-sectional view of the arm when a swing door in the closed position is moved to the open side.

[0029] Figure 15 It is a three-dimensional view showing different assembly schemes of the traction device unit.

[0030] Figure 16 This is a diagram showing a modified example of the conversion mechanism of the traction device.

[0031] Figure 17 This is a diagram illustrating a variation of the conversion mechanism.

[0032] Figure 18 This is a diagram illustrating a variation of the conversion mechanism.

[0033] Figure 19 This is a diagram showing a modified example of the traction device unit.

[0034] Figure 20 This is a diagram showing a modified example of the traction device unit.

[0035] Figure 21 This is a diagram showing a modified example of the traction device unit.

[0036] Figure 22 This is a diagram showing a modified example of the traction device unit.

[0037] Figure 23 This is a diagram showing a modified example of the traction device unit.

[0038] Figure 24 This is a diagram showing a modified example of the traction device unit.

[0039] Figure 25 This is a diagram showing a modified example of the traction device unit.

[0040] Figure 26 This is a diagram showing a modified example of the traction device unit.

[0041] Figure 27 This is a diagram showing a modified example of the traction device unit.

[0042] Figure 28 This is a diagram showing a modified example of the traction device unit.

[0043] Figure 29 This is a diagram showing a modified example of the traction device unit. Detailed Implementation

[0044] (First Implementation)

[0045] Reference Figures 1 to 29 The traction device unit 100 of the first embodiment of this disclosure will be described.

[0046] Figure 1 This is a perspective view of the traction device unit 100.

[0047] The pulling device unit 100 includes: a pulling device 3, mounted on the frame 1; and a receiving seat 8, mounted on the swing door 2. The swing door 2 is a swing door that is closable and mounted on the right door hinge of the frame 1. The pulling device unit 100 is mounted on the door end side of the swing door 2. The pulling device unit 100 has a pulling function and a damping function, which, while mitigating the impact when closing the swing door 2, reliably pulls the swing door 2 to the closed position.

[0048] In the following description, the closing direction of the swing door 2 in the opening and closing direction B is referred to as the "closing side B1", and the opening direction of the swing door 2 in the opening and closing direction B is referred to as the "opening side B2".

[0049] like Figure 1 As shown, the traction device 3 is mounted on the lower surface of the upper frame 1a of the frame 1. The traction device 3 includes: a main body 4, which is mounted on the frame 1; and an arm 5, which is rotatably mounted on the main body 4.

[0050] Figure 2 This is an exploded view of the traction device 3.

[0051] The main body 4 is assembled on the lower surface of the upper frame 1a of the frame 1, supporting the arm 5 so that it can rotate. The main body 4 includes an upper shell 41, a lower shell 42, a support column 43, and an up-and-down adjustment mechanism 44.

[0052] The upper housing 41 is formed in a semi-cylindrical shape. A through hole 41d is formed on the upper surface 41a of the upper housing 41 for fastening members such as screws to pass through. The upper housing 41 is assembled to the frame 1 by fastening members such as screws. The upper housing 41 is assembled to the frame 1 with the upper surface 41a of the upper housing 41 in contact with the lower surface of the upper frame 1a of the frame 1, and the flat side 41b of the upper housing 41 in contact with the side 1c of the closed side B1 of the door stop 1b of the frame 1.

[0053] The upper housing 41 has an opening 41h for adjusting the up-down adjustment mechanism 44, and a cover 41c for closing the opening 41h. The cover 41c is detachably mounted to the upper housing 41.

[0054] The lower housing 42 is a housing assembled to the upper housing 41 from the lower side. A support column 43 is provided on the lower surface of the lower housing 42.

[0055] The support column 43 is a generally cylindrical component disposed on the lower surface of the lower housing 42 and extending downward. The support column 43 is formed in a non-circular shape with a portion of a circle cut off in a cross section perpendicular to the vertical direction. The arm 5 is rotatably mounted to the support column 43 about the central axis RO extending in the vertical direction of the support column 43.

[0056] The vertical adjustment mechanism 44 is a component connecting the upper housing 41 and the lower housing 42, and is a fastening component such as a screw. The vertical adjustment mechanism 44 can adjust the position of the lower housing 42 relative to the upper housing 41 in the vertical direction. Specifically, the user releases the vertical adjustment mechanism 44 from the upper housing 41 and the lower housing 42, thereby changing the position of the lower housing 42 relative to the upper housing 41 in the vertical direction. Then, the user retightens the upper housing 41 and the lower housing 42, thereby fixing the position of the lower housing 42 relative to the upper housing 41 in the vertical direction.

[0057] After assembling the main body 4 onto the frame 1, the user removes the cover 41c and adjusts the up-down adjustment mechanism 44 through the opening 41h, thereby adjusting the position of the lower housing 42 relative to the upper housing 41 in the up-down direction. Thus, the user can adjust the up-down position of the arm 5 to align it with the position of the receiving seat 8.

[0058] Arm 5 is rotatably mounted to body 4 with rotation axis RO as the rotation center. Arm 5 has housing 50, engaging shaft 53, assembly part 54, first fastening member 56, second fastening member 57, cover 58, spring mechanism 6 and damping mechanism 7.

[0059] The housing 50 is formed as a box extending along a longitudinal direction A perpendicular to the rotation axis RO of the arm 5 extending in the vertical direction. The housing 50 has a first housing 51 and a second housing 52. The first housing 51 and the second housing 52 are connected opposite each other in the vertical direction. The housing 50 houses an assembly part 54, a spring mechanism 6, and a damping mechanism 7.

[0060] In the following description, the side of the rotation axis RO in the long dimension direction A of the arm 5 is referred to as the "base end side A2", and the side of the arm 5 opposite to the rotation axis RO in the long dimension direction A is referred to as the "top end side A1". In addition, in the rotation direction R of the arm 5 with the rotation axis RO as the center of rotation, the direction of rotation of the arm 5 when the swing door 2 is closed is referred to as the "closing side R1", and the direction of rotation of the arm 5 when the swing door 2 is opened is referred to as the "opening side R2".

[0061] A guide wall 50g is formed on the housing 50 (first housing 51 and second housing 52) for linear movement along the longitudinal direction A by a guide spring mechanism 6 and a damping mechanism 7.

[0062] A guide wall 50h is formed on the housing 50 (first housing 51 and second housing 52) to guide the rotational movement of the assembly part 54 with the rotation axis RO as the rotation center.

[0063] The engaging shaft (engaging part) 53 is a convex member provided on the top side A1 of the housing 50. The engaging shaft 53 is formed to engage with the engaging groove 82. Specifically, the engaging shaft 53 is formed into a cylindrical shape extending from both sides (upper side and lower side) of the housing 50 in the upward and downward direction.

[0064] The assembly part 54 is a generally annular component provided on the base end side A2 of the housing 50. The assembly part 54 is assembled to the support column 43 such that the axial central axis of the assembly part 54 coincides with the vertical central axis of the support column 43. The assembly part 54 is assembled to the support column 43 of the main body 4 by a first fastening member 56. By fitting the non-circular support column 43 into the hole of the same shape provided in the assembly part 54, the assembly part 54 is assembled to the support column 43 of the main body 4 in a non-rotatable manner. A through hole 54r is formed in the assembly part 54, which passes through in the axial direction and extends in the rotation direction R. A cam 55 is formed on the outer periphery of the assembly part 54.

[0065] The cam 55 is formed on the outer periphery of the mounting portion 54 and cannot rotate relative to the support column 43 of the main body 4. The outer peripheral surface of the cam 55 has a first outer peripheral surface 55s, a second outer peripheral surface 55t, and a engaging surface 55e. The first outer peripheral surface 55s, the second outer peripheral surface 55t, and the engaging surface 55e are arranged along the rotation direction R from the open side R2 to the closed side R1. The first outer peripheral surface 55s and the second outer peripheral surface 55t are continuous outer peripheral surfaces.

[0066] The outer diameter (cam diameter) of the first outer circumferential surface 55s from the rotation axis RO is constant and has the same curvature. It is the surface on which the roller 62 of the spring mechanism 6 slides.

[0067] The outer diameter (cam diameter) of the second outer peripheral surface 55t from the rotation axis RO decreases along the rotation direction R. Specifically, the cam diameter of the second outer peripheral surface 55t decreases along the rotation direction R from the open side R2 towards the closed side R1. The second outer peripheral surface 55t is the surface on which the roller 62 of the spring mechanism 6 slides.

[0068] The engaging surface 55e is a plane extending radially. The normal of the engaging surface 55e faces the opening side R2. The engaging surface 55e is the surface in contact with the slider 73 of the damping mechanism 7.

[0069] The second fastening member 57 fixes the first housing 51 and the second housing 52. The second fastening member 57 is inserted through the through hole 54r and other spaces, and the first housing 51 and the second housing 52 are rotatably assembled to the assembly part 54 with the rotation axis RO as the center.

[0070] The cover 58 is a portion of the housing 50 for assembling the first fastening member 56 and the second fastening member 57, and it is a member that covers the portion opposite to the main body 4. The cover 58 is detachably assembled to the housing 50.

[0071] The spring mechanism 6 is guided by the guide wall 50g of the housing 50 and is telescopically accommodated within the housing 50 along the longitudinal direction A of the housing 50. The central axis of the spring mechanism 6 in the telescopic direction passes through or is near the rotation axis RO. The spring mechanism 6 includes a slider 61, a roller 62, a coil spring 63, and a fixing part 64.

[0072] The slider 61 has: a U-shaped support portion 61a that supports the roller 62 for rotation via a shaft 61c extending in the vertical direction; and a strip portion 61b that extends from the support portion 61a toward the top end side A1 in the longitudinal direction A. The strip portion 61b is inserted into the interior of the coil spring 63.

[0073] Roller 62 is rotatably mounted on shaft 61c. The outer peripheral surface of roller 62 slides along the outer peripheral surface of cam 55 (first outer peripheral surface 55s and second outer peripheral surface 55t).

[0074] The coil spring 63 is telescopically housed within the housing 50 along its longitudinal direction A. The coil spring 63 is a compression spring that applies a force in the elongation direction along its longitudinal direction A. The tip A1 end of the coil spring 63 contacts the fixing part 64. The base A2 end of the coil spring 63 contacts the support part 61a of the slider 61.

[0075] The fixing part 64 fixes the top end A1 of the coil spring 63 to the housing 50. That is, the top end A1 of the coil spring 63 is the fixed end, and the base end A2 of the coil spring 63 is the free end.

[0076] The damping mechanism 7 is a telescopic damping mechanism. The damping mechanism 7 is guided by the guide wall 50g of the housing 50 and is telescopically accommodated within the housing 50 along the longitudinal direction A of the housing 50. The damping mechanism 7 includes a cylinder 71, a rod 72, and a slider 73.

[0077] The cylinder 71 is a cylindrical component filled with a viscous fluid. A portion of the rod 72 is inserted into the cylinder 71 and travels relative to the cylinder 71 along its longitudinal direction A. A coil spring (not shown) is built into the cylinder 71 and always applies a force in the direction that causes the rod 72 to protrude from the cylinder 71.

[0078] The slider 73 is mounted on the rod 72 and moves linearly along the longitudinal direction A together with the rod 72. The slider 73 engages with the engagement surface 55e of the cam 55.

[0079] The damping mechanism 7 and the spring mechanism 6 are housed side by side in the housing 50. That is, the extension and retraction direction of the spring mechanism 6 (the direction of the spring force) is approximately the same as the extension and retraction direction of the damping mechanism 7 (the direction of the damping force).

[0080] In the traction device 3, the spring mechanism 6 and the damping mechanism 7, which are the main mechanisms, are not concentrated in the main body 4, but in the arm 5. Moreover, the spring mechanism 6 and the damping mechanism 7 are housed side by side in the housing 50. Therefore, the traction device 3 can be miniaturized.

[0081] Figure 3 This is a three-dimensional diagram of the support seat 8.

[0082] The receiving seat 8 is mounted on the side 2a of the swing door 2. The receiving seat 8 is mounted on the door end side and the upper side of the side 2a of the swing door 2. The receiving seat 8 is formed into a generally cuboid shape extending along the longitudinal direction L. The receiving seat 8 has a buffer member 81 and an engaging groove 82.

[0083] The receiving seat 8 has a through hole 83 for fastening components such as screws to pass through. The receiving seat 8 is assembled to the side 2a of the swing door 2 by fastening components such as screws.

[0084] The buffer 81 is the curved surface where the engagement shaft 53 of the arm 5 initially contacts the bearing seat 8. The buffer 81 is formed as a slope that is recessed relative to the side 2a.

[0085] The engaging groove (engaging part) 82 is a groove that engages with the engaging shaft 53 of the arm 5, extending from the buffer member 81 along the longitudinal direction L. The engaging shaft 53 of the arm 5 is inserted into the inner side of the engaging groove 82 through the insertion port 84 formed near the buffer member 81, and moves towards the door end side while engaging with the engaging shaft 53.

[0086] At least a portion of the through hole 83 is formed inside the engagement groove 82. Therefore, it is difficult to see from the outside even without a cover being installed on the through hole 83.

[0087] In this embodiment, the receiving seat 8 is assembled on the side 2a of the swing door 2 with the long dimension L of the receiving seat 8 aligned with the width direction of the swing door 2 and the buffer 81 facing the door hinge side.

[0088] Figure 4 This is a perspective view showing the pulling device unit 100 mounted on the swing door 2B with the left door hinge. The housing 50 of the arm 5 and the engaging shaft 53 are shaped to be symmetrical with respect to a horizontal plane perpendicular to the vertical direction. Therefore, as... Figure 4 As shown, by flipping the arm 5 in the up-down direction to assemble it onto the main body 4, the pulling device unit 100 can be assembled onto the swing door 2B on the left door hinge.

[0089] Next, the operation of the traction device unit 100 will be explained. Figures 5 to 8 This is a perspective view showing the action of the pulling device unit 100 pulling the swing door 2 towards the closed position. Figures 9 to 12 Is with Figures 5 to 8The corresponding sectional view of arm 5. Arm 5 and the receiving seat 8 are joined by closing the swing door 2, and separated by opening the swing door 2.

[0090] In the following description, the angle between the direction C of the extension of the upper frame 1a of the frame 1 and the long dimension direction A of the arm 5 is called the "arm angle α".

[0091] like Figure 1 As shown, before the pulling device 3 performs the pulling action of the swing door 2, the arm 5 is not engaged with the receiving seat 8 and is positioned in the standby position P0. In the standby position P0, no rotational torque T is generated on the arm 5 that would cause it to rotate toward the closing side R1.

[0092] like Figure 5 and Figure 9 As shown, when the swing door 2 is closed, the engagement shaft 53 of the arm 5 contacts the buffer 81 of the receiving seat 8. The arm 5 moves to the first position P1. When the arm 5 is positioned in the first position P1, the roller 62 of the spring mechanism 6 contacts the first outer peripheral surface 55s of the cam 55. Therefore, no rotational torque T is generated on the arm 5 positioned in the first position P1, causing the arm 5 to rotate toward the closing side R1. Furthermore, when the arm 5 is positioned in the first position P1, the slider 73 of the damping mechanism 7 does not contact the engagement surface 55e of the cam 55. Therefore, the damping mechanism 7 does not travel in the retraction direction, and no damping force D is generated.

[0093] The buffer 81 is formed as a slope that is recessed relative to the side 2a. Therefore, the buffer 81 can mitigate the impact when the engagement shaft 53 of the arm 5 collides with the buffer 81 of the receiving seat 8 and reduce the contact noise.

[0094] like Figure 6 and Figure 10 As shown, when the swing door 2 is further closed, the engagement shaft 53 of the arm 5 enters the internal space through the insertion port 84 along the buffer 81 of the receiving seat 8. The arm 5 moves to the second position P2. When the arm 5 is positioned in the second position P2, the roller 62 of the spring mechanism 6 contacts the first outer peripheral surface 55s of the cam 55. Therefore, no rotational torque T is generated on the arm 5 in the second position P2, causing the arm 5 to rotate toward the closing side R1. Furthermore, when the arm 5 is positioned in the second position P2, the slider 73 of the damping mechanism 7 does not contact the engagement surface 55e of the cam 55. Therefore, the damping mechanism 7 does not travel in the retraction direction, and no damping force D is generated.

[0095] Figure 13 It is a graph showing the relationship between the arm angle α and the rotational torque T.

[0096] Until arm 5 moves from the standby position P0 through the first position P1 to the second position P2, no rotational torque T is generated on arm 5 to cause arm 5 to rotate toward the closed side R1. The range of movement of arm 5 from the standby position P0 to the second position P2 is called the "free range (torque-free range) E1". The difference in arm angle α between arm 5 configured in the standby position P0 and arm 5 configured in the second position P2 is, for example, 10 degrees to 12 degrees.

[0097] like Figure 7 and Figure 11 As shown, when the swing door 2 is further closed, the engaging shaft 53 of the arm 5 moves towards the door end along the engaging groove 82. The arm 5 moves across the free zone E1 to the pulling zone E2 (the third position P3 is part of the pulling zone E2). When the arm 5 is positioned in the pulling zone (torque generation zone) E2, the roller 62 of the spring mechanism 6 contacts the second outer peripheral surface 55t of the cam 55. The first outer peripheral surface 55s is the surface where the cam diameter decreases along the rotational direction R from the open side R2 to the closed side R1. The roller 62 slides towards the closed side R1 by the elongation force of the coil spring 63 of the spring mechanism 6. As a result, a rotational torque T is generated on the arm 5 positioned in the pulling zone E2, causing the arm 5 to rotate towards the closed side R1.

[0098] That is, cam 55 is a conversion mechanism that converts the spring force of spring mechanism 6 into rotational torque that causes arm 5 to rotate toward the closing side R1 (the direction that pulls the swing door 2 toward the closing side B1). In this embodiment, the torque generating mechanism (spring mechanism 6 and conversion mechanism) that generates rotational torque T is housed in arm 5.

[0099] Furthermore, when arm 5 is positioned in the traction zone E2, the slider 73 of the damping mechanism 7 contacts the engagement surface 55e of the cam 55. The damping mechanism 7 travels in the contraction direction and presses the engagement surface 55e of the cam 55, generating a damping force D that opposes the rotational torque T.

[0100] Arm 5, positioned in the traction zone E2, rotates towards the closing side R1 due to a rotational torque T. As a result, the engagement shaft 53 of arm 5 engages with the engagement groove 82 of the receiving seat 8, pulling the swing door 2 towards the closing side B1. At this time, due to the damping force D generated that opposes the rotational torque T, arm 5 slowly rotates towards the closing side R1. Therefore, the swing door 2 slowly closes to the closed position.

[0101] like Figure 8 and Figure 12 As shown, arm 5 rotates to the fourth position P4, and the swing door 2 is reliably pulled until it is closed.

[0102] The rotation range of arm 5 around the rotation axis RO is divided into a free range (no torque generation range) E1 and a traction range (torque generation range) E2. When arm 5 is positioned in the free range (no torque generation range) E1, no rotational torque T is generated that causes arm 5 to rotate towards the closing side R1. When arm 5 is positioned in the traction range (torque generation range) E2, a rotational torque T is generated that causes arm 5 to rotate towards the closing side R1.

[0103] Figure 14 This is a cross-sectional view of arm 5 when the swing door 2, which is in the closed position, is moved to the open side B2. When the user moves the swing door 2 to the open side B2, the engaging shaft 53 of arm 5 engages with the engaging groove 82 of the receiving seat 8, and arm 5 rotates to the open side R2. When the user moves the swing door 2 further to the open side B2, arm 5 disengages from the buffer 81 of the receiving seat 8. At this time, since arm 5 is positioned in the free range (torque-free range) E1, no rotational torque T is generated. Therefore, arm 5 is positioned at the position immediately after disengaging from buffer 81. That is, whenever the swing door 2 is opened, arm 5 automatically positions itself in the standby position P0 where the engaging shaft 53 can make good contact with buffer 81.

[0104] For example, even if the receiving seat 8 is slightly offset in the width direction (left-right direction) of the swing door 2, the arm 5 will automatically position itself in the standby position P0 whenever the swing door 2 is opened. Therefore, the main body 4 only needs to have a vertical adjustment mechanism 44, and may not need to have a horizontal adjustment mechanism.

[0105] For example, even if the position of the support seat 8 in the width direction (left and right direction) is offset due to the aging of the hinge of the swing door 2, the arm 5 will automatically be positioned in the standby position P0 whenever the swing door 2 is opened.

[0106] The standby position P0 is not a fixed position, but any position within the free range E1. The standby position P0 is optimized each time the swing door 2 is opened, based on the position of the receiving seat 8 and the position of the swing door 2.

[0107] According to the traction device unit 100 of this embodiment, the spring mechanism 6 and damping mechanism 7, which are the main mechanisms in the traction device 3, are not concentrated in the main body 4, but in the arm 5. Moreover, the spring mechanism 6 and damping mechanism 7 are housed side by side in the housing 50. Therefore, the traction device 3 can be miniaturized. In addition, the number of parts in the traction device unit 100 can be reduced.

[0108] According to the traction device unit 100 of this embodiment, since the traction device 3 has an up-down adjustment mechanism 44, it is not necessary to provide an up-down adjustment mechanism on the receiving seat 8, which enables the receiving seat 8 to be miniaturized.

[0109] According to the traction device unit 100 of this embodiment, a free zone E1 is provided in the rotation range of the arm 5. Whenever the swing door 2 is opened, the arm 5 automatically positions itself in the standby position P0, thus ensuring high workability. The standby position P0 of the arm 5 is optimized and is not affected by the position of the support seat 8 or the condition of the hinge of the swing door 2. In addition, the free zone E1 provided in the rotation range of the arm 5 results in less rebound when closing the swing door 2, making it easy to close even when the swing door 2 is closed slowly.

[0110] The first embodiment of this disclosure has been described in detail above with reference to the accompanying drawings. However, the specific configuration is not limited to this embodiment and includes design changes that do not depart from the spirit of this disclosure. Furthermore, the constituent elements shown in the above embodiment and the following variations can be appropriately combined to form a configuration.

[0111] (Variation Example 1)

[0112] In the above embodiment, the pulling device 3 is assembled to the frame 1, and the receiving seat 8 is assembled to the swing door 2. However, it is also possible that the pulling device 3 is assembled to the swing door 2, and the receiving seat 8 is assembled to the frame 1.

[0113] (Variation Example 2)

[0114] In the above embodiment, the pulling device unit 100 is mounted on the door end side of the swing door 2. However, the pulling device unit 100 may also be mounted on the door hinge side.

[0115] (Variation Example 3)

[0116] In the above embodiment, the damping mechanism 7 is a linear damper. However, it can also be a rotational damper.

[0117] (Variation Example 4)

[0118] Figure 15 This is a perspective view showing different assembly schemes of the traction device unit 100.

[0119] The pulling device unit 100 can also be assembled in the opposite direction to the width direction (left and right direction) of the swing door 2.

[0120] (Variation Example 5)

[0121] Figures 16 to 18 This is a diagram showing a variation of the conversion mechanism.

[0122] In the above embodiment, the conversion mechanism that transforms the spring force of the spring mechanism 6 into a rotational torque that causes the arm 5 to rotate toward the closed side R1 is the cam 55. However, the conversion mechanism is not limited to this. For example... Figures 16 to 18 As shown, the conversion mechanism may also include a linkage mechanism 59. In this case, the spring mechanism 6 is connected to the cam 55 via the linkage mechanism 59 instead of the roller 62.

[0123] (Variation Example 6)

[0124] Figures 19 to 23 This diagram shows a modified example of a traction device unit 100B. The traction device unit 100B includes a traction device 3B and a receiving seat 8B. The traction device 3B includes a main body 4 and an arm 5B. Compared to arm 5, arm 5B has an engaging groove (engaging portion) 53B instead of an engaging shaft 53. Compared to the receiving seat 8, the receiving seat 8B has an engaging shaft (engaging portion) 82B instead of an engaging groove 82. That is, in the traction device unit 100B, the arrangement of the engaging groove and the engaging shaft is reversed compared to the traction device unit 100.

[0125] (Variation Example 7)

[0126] Figures 24 to 29 This diagram shows a modified example of a traction device unit 100C. The traction device unit 100C includes a traction device 3C and a receiving seat 8C. The traction device 3C includes a main body 4C and an arm 5C. The main body 4C houses an assembly part 54, a spring mechanism 6, and a damping mechanism 7. The arm 5C does not house the assembly part 54, the spring mechanism 6, or the damping mechanism 7. The receiving seat 8C has an engagement groove 82 for engaging the arm 5C, which opens upwards. The rotation range of the arm 5C is divided into a free range (no torque generation range) E1 and a traction range (torque generation range) E2. Even when the main body 4C houses the spring mechanism 6 and the damping mechanism 7, the effect is the same as in the above embodiment, based on the free range (no torque generation range) E1.

[0127] Industrial availability

[0128] This disclosure can be applied to devices for pulling swing doors, etc.

[0129] Explanation of reference numerals in the attached figures

[0130] 100, 100B, 100C: Device unit; 1: Frame; 1a: Upper frame; 1c: Side; 2: Swing door (right door hinge); 2a: Side; 2B: Swing door (left door hinge); 3, 3B, 3C: Pulling device; 4, 4C: Main body; 41: Upper housing; 41a: Upper surface; 41b: Side; 41c: Cover; 41d: Hole; 41h: Opening; 42: Lower housing; 43: Support column; 44: Up and down adjustment mechanism; 5, 5B, 5C: Arm; 50: Housing; 51: First housing; 52: Second housing; 53: Engaging shaft (engaging part); 53B: Engaging groove (engaging part); 54: Assembly part; 55: Cam; 55e: Engaging surface; 55s: First outer peripheral surface; 55t: Second outer peripheral surface; 59: Linkage mechanism; 6: Spring mechanism ; 61: slider; 62: roller; 64: fixed part; 7: damping mechanism; 71: cylinder; 72: rod; 73: slider; 8, 8B, 8C: receiving seat; 81: buffer; 82: engaging groove (engaging part); 82B: engaging shaft (engaging part); 84: insertion port; A: long dimension direction; A1: top end side; A2: base end side; B: opening and closing direction; B1: closed side; B2: open side; D: damping force; E1: free range (torque not generated range); E2: pulling range (torque generated range); L: long dimension direction; P0: standby position; P1: first position; P2: second position; P3: third position; P4: fourth position; R: rotation direction; R1: closed side; R2: open side; RO: rotating shaft; T: rotation torque; α: arm angle.

Claims

1. A pulling device unit, which is a pulling device unit assembled on a frame and a hinged door assembled on the frame for opening and closing, comprising: A receiving seat is fitted onto one side of the frame and the swing door; The main body, assembled on the other side of the frame and the swing door; and An arm, rotatably mounted to the main body, merges with the receiving seat to pull the swing door toward the closed side. One of the main body and the arm has a torque generating mechanism that generates rotational torque, which causes the arm to rotate in the direction that pulls the swing door toward the closed side. The rotation range of the arm is divided into: In the region where no torque is generated, the rotational torque is not produced; and The torque generation range generates the rotational torque.

2. The traction device unit according to claim 1, wherein, When the swing door moves to the open side and the receiving seat separates from the arm, the arm is positioned in the torque-free zone and is in a standby position that allows it to contact the receiving seat.

3. The traction device unit according to claim 1, wherein, The torque generating mechanism is housed in the arm.

4. The traction device unit according to claim 1, wherein, When the swing door moves toward the closed side and the receiving seat contacts the arm, the arm is positioned in the range where no torque is generated.

5. The traction device unit according to claim 4, wherein, With the arm positioned in the torque-free zone, the swing door moves further toward the closing side, thereby rotating the arm into the torque-generating zone.

6. The traction device unit according to claim 1, wherein, The torque generating mechanism has: Spring mechanism; as well as The conversion mechanism converts the spring force of the spring mechanism into a rotational torque that causes the arm to rotate in the direction that pulls the swing door toward the closed side.

7. The traction device unit according to claim 6, wherein, The conversion mechanism includes a cam. The outer peripheral surface of the cam has a first outer peripheral surface and a second outer peripheral surface disposed on the pulling direction side of the first outer peripheral surface. The cam diameter on the first outer peripheral surface is constant. The cam diameter on the second outer peripheral surface tends to decrease towards the direction of the pull.

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