JP5018887B2 - Buffer mechanism for opening / closing moving body and retractor using the same - Google Patents

Description

  The present invention relates to a buffer mechanism that suppresses the opening / closing momentum of a sliding door, partition door, hinged door, furniture drawer, curtain, etc. (hereinafter collectively referred to as an opening / closing moving body) at a position near the opening / closing end, and It is related with the drawing-in apparatus used.

  Sliding doors, partition doors, hinged doors, furniture drawers, curtains, etc. are supported so that they can be smoothly opened and closed. There is a problem that they may be slightly opened due to rebounding, and a problem that the sliding door or the like must be operated by hand until it is completely closed.

  Conventionally, in order to solve such a problem, a shock absorber and a retractor using a cylinder type damper, a cushion spring, and the like are known. However, the cylinder type damper is expensive, and the cylinder type damper and the cushion spring act to push back in the direction to open the slide door in the closed position, so that the slide door etc. is stopped in the closed position. Requires a catch member for maintaining the stop position of the slide door or the like. In addition, the pull-in device using wire pulling is not easy to attach / remove the slide door, etc., because one end of the wire is locked to the slide door and the other end is locked to the upper rail. There was a problem that the doors could not be left open.

  Also, the rack gear is moved in a linear direction using wires and springs, and the movement in the pull-in direction, which is the movement of the rack gear in the linear direction, is transmitted to the rotary damper via the pinion gear meshed with the rack gear, and the rotary damper has There are known shock absorbers that reduce the pull-in speed of the rack gear by the resistance to be applied (see, for example, JP-A-2006-348553 and JP-A-2006-299578).

  However, in such a shock absorber, since the meshing position of the rack gear and the pinion gear is offset from the rotational axis of the pinion gear, an oblique force is applied to the rotational shaft of the rotary damper that supports the pinion gear. . As a result, the rotation of the rotary damper may be adversely affected, and the rotary damper may be damaged. Also, because the rack gear is supported on one side, the rack gear is lifted in a direction where the meshing with the pinion gear becomes shallower, the meshing by both gears becomes shallow, the meshing of both gears is disengaged, and both gears are disengaged. There is a risk that the backlash due to will increase and the teeth of both gears may be lost.

  The present invention has been made in order to solve the above-described conventional problems, and provides a shock-absorbing mechanism for an open / close moving body that has a strong, reliable and smooth power transmission structure and does not require a catch member; An object of the present invention is to provide a pull-in device that is provided with this buffer mechanism and that can be pulled in securely and reliably.

  In order to solve the above-described problems, the present invention provides a shock absorbing mechanism that is disposed on an opening / closing moving body and slows the closing operation of the opening / closing moving body, and has a spiral shaft having a spiral groove or a spiral convex shape on a side surface. A holder having a bearing portion of the spiral shaft, a slider that is fitted to the spiral shaft and rotates the spiral shaft by movement along the axial direction of the spiral shaft, and movement of the slider along the axial direction A rotation damper that applies resistance to rotation of the spiral shaft by the slider and slows down the movement of the slider in the closing direction of the open / close moving body, and the spiral of the spiral shaft is provided inside the slider. An engaging portion that engages with the groove or the spiral convex shape is provided, and the slider engages with the opening / closing moving body that moves in the axial direction of the spiral shaft. In which parts are provided.

  The buffer mechanism of the opening / closing moving body is used, for example, as a device that prevents a collision sound when the slide door is operated to close forcefully and a rebound when the slide door collides, and a retracting device. In addition to sliding doors, it is used as a shock absorber that prevents collision sound generated when a partition door, hinged door, furniture drawer, curtain, etc. are closed with force, and rebound at the time of collision. In addition to this, it can be mounted as a buffer mechanism for a moving part of a machine and an electric product.

  When the buffer mechanism is used as a shock absorber for a slide door, the shock absorber is mounted in the upper rail of the slide door. When this shock absorber is installed in the upper rail, the guide member provided at the upper end of the slide door is the locking portion of this shock absorber when the manually operated slide door reaches the position before it closes. I can receive it. The spiral shaft is pushed and rotated by the linear movement of the slider provided with the locking portion. However, since the resistance force by the rotary damper is applied to this rotation, the spiral shaft rotates slowly. As a result, the slider also moves slowly, and even if the sliding door is operated in the direction to close it, the brake is applied just before the closing is completed, the sliding door closes quietly, and the collision sound when the sliding door closes. And the rebound due to the collision is greatly suppressed.

  The slider and the spiral shaft have one of the following two engagement structures. One of the engagement structures is a structure in which two spiral grooves formed on the spiral shaft are engaged with an engagement portion formed on a protrusion or a short convex shape formed inside the slider. Another engagement structure is a structure in which two spiral convex shapes formed on the spiral shaft are engaged with an engagement portion formed of a groove formed inside the slider. Further, an engagement structure in which a ball bearing is interposed between the two spiral grooves formed on the spiral shaft and the inside of the slider may be used.

  Since the structure of the buffer mechanism is simple, it can be made strong. In addition, the structure in which the slider is fitted to the spiral shaft does not disengage the spiral shaft and the slider, and the center of the slider is aligned with the axis of the spiral shaft. The power transmission performed in can be performed smoothly.

  A contact member provided at a front end portion of the spiral shaft or an intermediate shaft portion in the vicinity of the front end portion; and a receiving member for contacting the corresponding contact member, wherein the contact member receives the contact member. A sliding clutch type rotary damper that slows down the rotation of the spiral shaft by frictional resistance that is generated when the member is slid while being pressed against the member, and the spiral shaft is at a position where at least the contact member contacts the receiving member Until the holder is movable in the axial direction.

  The sliding clutch type rotary damper provided in the buffer mechanism functions by moving the spiral shaft in the closing direction of the opening / closing moving body. That is, when an external force is applied to the slider in a direction in which the opening / closing moving body is closed, the spiral shaft is pressed, and the contact member provided at the tip of the spiral shaft presses the receiving member while rotating together with the spiral shaft. For this reason, the contact member rotates while being in sliding contact with the receiving member, and resistance is applied to the rotation of the spiral shaft by the frictional resistance caused by the sliding contact. As a result, the movement of the slider in the axial direction also becomes slow. The shock absorbing mechanism can be further strengthened because of the simple structure that makes the rotation of the spiral shaft slow by frictional resistance.

  In the retracting device of the opening / closing moving body, it is preferable that the above-described buffer mechanism is provided, and the biasing member for biasing the slider in the closing direction of the opening / closing moving body is provided.

  The difference between the buffer mechanism described above and the retracting device is that the retracting device is provided with a biasing member that biases the slider forward. The biasing member biases the slider in the closing direction of the opening / closing moving body. For example, when the slide door is moved to a position before the hand is closed by hand, the pull-in device is pulled in until the slide door is closed even if the hand is released from the slide door. This pull-in is accompanied by the rotation of the spiral shaft, and since the rotation of the spiral shaft is suppressed by the rotary damper, the pull-in speed becomes slow. Since the above-described buffer mechanism is provided, a strong pull-in device having a smooth power transmission structure can be obtained.

  The urging member is preferably a coil spring fitted to the spiral shaft and having one end locked to the holder. The most suitable biasing member is a coil spring. The coil spring fitted to the spiral shaft applies a biasing force in the linear direction to the slider, forcing the slider and the locking portion to close the open / close moving body. Move in the direction. Since the coil spring, which is an urging member, is fitted to the spiral shaft, and no space is required for the urging member, the retracting device can be reduced in size.

  The rotary damper has a damper case supported by the holder, a cap of the damper case, and a rotation shaft that protrudes from one surface, and is rotatably disposed in the damper case. A rotor in which the rotating shaft protrudes outward from the damper case from the hole formed in the hole, and the rotation of the rotor in at least one direction is the resistance of oil filled in the damper case Therefore, it is desirable that the rotation speed of the oil resistance type rotary damper be slow, and the rotation shaft can be engaged with the spiral shaft.

  A commercially available product can be used as the oil resistance type rotary damper provided in the pull-in measure. The oil resistance type rotary damper is for imparting resistance to the rotation of the spiral shaft in at least one direction, suppresses the rotation of the spiral shaft, and slows the movement of the slider opening / closing moving body in the closing direction. Since the rotary damper is composed of an oil resistance type rotary damper, the rotational speed of the spiral shaft can be surely made slow without causing noise, and the open / close moving body can be closed slowly. Further, since the rotation shaft of the oil resistance type rotary damper and the axis of the spiral shaft are aligned, the rotation of the spiral shaft can be transmitted smoothly and reliably.

  According to the present invention, in the improved pull-in device, a contact member provided at a front end portion of the spiral shaft, a receiving member for contacting the corresponding contact member, and the oil resistance type rotary damper are used as the contact member. An urging damper spring, wherein the spiral shaft is held by the holder so as to be movable in the axial direction of the spiral shaft, the contact member has an umbrella-like slope, and the receiving member is the contact member The oil resistance type rotary damper has an inner slope facing the umbrella-like slope of the member and an opening portion aligned with the center position of the inner slope, and is fixed to the holder. When projecting from the hole portion to the contact member and being urged toward the contact member by the damper spring, when the spiral shaft moves in the closing direction of the opening / closing moving body, The contact member is in front Abutting on the rotating shaft, the oil resistance type rotating damper is temporarily retracted, and further contacting the receiving member to stop the movement of the spiral shaft. Immediately thereafter, the oil resistance type rotating damper is biased by the damper spring. Power is transmitted between the abutting member and the rotary shaft, and the spiral shaft is rotated slowly by the oil resistance rotary damper, and the spiral shaft is rotated. When there is no momentum in the movement in the closing direction, power transmission is performed between the contact member and the rotating shaft without going through a process in which the contact member contacts the receiving member, It is desirable that the rotation of the spiral shaft is made slow by the oil resistance type rotary damper.

  For example, in the case of a slide door, the abutment member and the receiving member provided in the pull-in device have a strong impact force applied to the slider due to this momentum when the slide door is manually closed. It acts as a thrust damper to prevent the occurrence and protect each part of the retracting device from the impact caused by this collision. This action is a so-called cushioning action that softens the impact by slightly moving the spiral shaft.

  In this pull-in device, the action differs depending on whether the momentum applied to the slider applied in the closing direction of the opening / closing moving body is strong or not. When the momentum applied to the slider is strong, regardless of the rotation of the spiral shaft, the slider instantaneously moves the spiral shaft in the closing direction of the opening / closing moving body, and the contact member contacts the rotation shaft of the oil resistance damper. The entire oil resistance type rotary damper is moved backward. Immediately thereafter, the contact member contacts the receiving member, and the movement of the contact member and the spiral shaft stops. Immediately after this stop, the entire oil resistance type rotary damper is pushed back by the spring, and in this pushed back state, the rotation of the male spiral shaft is suppressed by the oil resistance type rotary damper.

  When there is no momentum in the forward movement of the slider or when momentum is low, the abutting member does not collide with the receiving member, even if the abutting member may slightly push the oil resistance type rotary damper. Since the rotary shaft of the rotary damper comes into contact, the rotation of the spiral shaft is suppressed by the oil resistance type rotary damper.

  Since the oil resistance type rotary damper is urged toward the contact member by the spring, it is possible to suppress an impact when the open / close moving body collides with the slider vigorously. Also, the components of the retracting device can be protected from this impact.

  It is desirable that the locking portion is freely rotatable between a locking maintenance posture for maintaining the locking of the opening / closing moving body and a locking releasing posture for releasing the locking. The locking portion provided on the slider of the retracting device, for example, locks the slide door by locking the guide member provided on the upper portion of the slide door at a position immediately before the slide door is closed. It is for pulling in the closing direction. When the slider is in the most retracted position, the locking portion is directed to an unlocking posture for releasing the locking by the guide member, and maintains the locking posture when the slider is in any other position. . Switching between the locking release posture and the locking posture of the locking portion is performed by receiving a pressing force by the guide member.

  Since the above-described locking portion can be rotated between the engagement maintaining posture and the locking release posture, the posture can be switched smoothly and reliably. In addition, since the locking portion can be temporarily stopped at the position of the locking release posture, the sliding door can be received smoothly and reliably.

  The locking part has a protruding part protruding outward, and the holder engages the protruding part at a location along the inner wall surface of the opening formed in the lower part. A guide portion for maintaining the locking maintenance posture, and the guide portion engages the protrusion with a rear end portion to maintain the locking posture of the locking portion, and the locking portion. It is desirable to have a temporary stop guide part that temporarily stops the movement of the part in the closing direction.

  The optimum structure of the guide portion provided in the retracting device is, for example, a groove formed long in the side wall of the holder, and the protrusion is inserted into the groove to be guided, whereby the locking portion. Is determined. The optimum structure of the temporary locking guide portion is, for example, a groove having a fan-shaped bottom surface that extends obliquely downward from the rear end portion of the groove serving as the guide portion, and the locking portion is rearward. After being pushed by the moving guide member and the locking part has moved to the rear end part of the guide part, when the projecting part moves into the temporary stop guide part, the locking part is directed to the locking release posture. And the front end part of this protrusion contact | abuts to the front-end edge of the temporary stop guide part, and the movement to the opening-closing moving body closing direction of the slider including a latching part is temporarily stopped. Since the protrusion is engaged with the guide portion and the temporary stop guide portion, the hook member can be reliably switched between the locking posture and the locking releasing posture.

  In the retracting device for the opening / closing moving body, the above-described buffer mechanism is provided, the holder has a spiral spring type biaser connected to the spiral shaft, and the spiral spring type biaser includes the slider. When the opening / closing moving body moves in the opening direction, it is preferable that the spiral spring is wound by the rotation of the spiral shaft, and the spiral shaft is rotated in one direction by the urging force by the unwinding of the spiral spring.

  The spiral spring type urging device provided in this retracting device is used in place of the coil spring that urges the slider forward. This spiral spring type biasing device applies a biasing force to the rotation of the spiral shaft in one direction, and moves the slider in the closing direction of the opening / closing moving body. Since the structure is simple, the retracting device can be made strong, and the urging force can be smoothly transmitted to the spiral shaft.

The front view of the slide door upper part which showed the attachment example of the shock absorber which concerns on the 1st Embodiment of this invention. (A) is a perspective view of the guide member in the buffer device, (b) is an exploded perspective view of the guide member, (c) is a front sectional view of the guide member. (A) (b) is side surface sectional drawing of the guide member of the buffering device with which the slide door was mounted | worn. The perspective view which looked at the buffering device from diagonally upward. The perspective view which looked at the buffering device from diagonally downward. Exploded perspective view of the shock absorber (A) is a front view of the shock absorber, and (b) is a configuration diagram in which a half case on the front side of the shock absorber is removed. (A) is a front view of the slider in the shock absorber, (b) is a right side view of the slider, (c) is an exploded perspective view of the slider, and (d) is a sectional view taken along line AA in FIG. 8 (b). (E) is a front view of the slider in a state where the hook member is directed to the unlocking posture. Sectional drawing in line AA of Fig.7 (a). Sectional drawing in line BB of Fig.7 (a). (A) and (b) are the exploded perspective views of the oil resistance type rotation damper in the buffer device. The front fragmentary sectional view which shows the state before the buffer operation start of the buffer device. The front fragmentary sectional view which shows the state in the middle of the buffering of the buffer device. The front fragmentary sectional view which shows the state which the buffer device received the strong external pressure. The disassembled perspective view of the drawing-in apparatus which concerns on the 2nd Embodiment of this invention. (A) is the front view of the drawing-in apparatus, (b) is the block diagram which removed and showed the half case of the near side of the drawing-in apparatus. The disassembled perspective view of the drawing-in apparatus which concerns on the 3rd Embodiment of this invention. (A) is the front view of the drawing-in apparatus, (b) is the block diagram which removed and showed the half case of the near side of the drawing-in apparatus. The perspective view which looked at the drawing-in apparatus concerning the 4th Embodiment of this invention from diagonally upward. The perspective view which looked at the drawing-in apparatus from diagonally downward. The block diagram which removed and showed the half case of the near side of the drawing-in apparatus. The partial front sectional view of the rear part of the retractor.

(First embodiment)
A shock absorber according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of an upper portion of a slide door showing an example of mounting a shock absorber. In this figure, a frame for a slide door and a part of an upper rail are shown in cross section. The shock absorber 1 is attached to the upper rail 120 of the slide door frame member 110 to which the slide door 100 is attached by screwing. The shock absorber 1 receives the guide member 90 attached to the upper end of the slide door 100 at a position before the slide door 100 is closed and applies the brake to the closing force of the slide door 100 to close the slide door 100. The impact sound is prevented, and the sliding door 100 is prevented from rebounding due to this collision. The shock absorber 1 is paired with a guide member 90 attached to the upper end portion of the slide door 100 and exhibits a shock absorbing function. The buffering of the sliding door 100 starts from a position before the sliding door 100 finishes closing as shown in FIG.

  2A is a perspective view of the guide member 90, FIG. 2B is an exploded perspective view of the guide member 90, and FIG. 2C is a front sectional view of the guide member 90. The guide member 90 is formed by assembling a case member 91, a vertically moving member 92, and two coil springs 93, 93 having an upward biasing force. The vertical advance / retreat member 92 is held in a case member 91 that is open upward, and is urged upward by two coil springs 93, 93 provided in the case member 91. Locking projections 92a and 92a for locking with hooks, which will be described later, are formed on the upper portions of both side surfaces of the vertical advance / retreat member 92 so as to protrude laterally. Are formed with protrusions 92b, 92b for preventing slipping. The locking protrusions 92a and 92a are locked to the shock absorber 1 shown in FIG. Long holes 91a, 91a are formed in both side walls of the case member 91 in the vertical direction, and protrusion prevention protrusions 92b, 92b formed at the centers of both side walls of the vertical advance / retreat member 92 are formed in the long holes 91a, 91a. By fitting, the vertical advance / retreat member 92 is prevented from coming off, and the vertical advance / retreat amount of the vertical advance / retreat member 92 is determined.

  3A and 3B show side cross-sectional views of the guide member 90 and the upper rail 120 mounted on the slide door 100. FIG. As shown in FIG. 3A, the upper end portion of the slide door 100 is supported so as to be able to run by allowing the upper part of the vertical advance / retreat member 92 of the guide member 90 to enter the upper rail 120. The backlash of the sliding door 100 is prevented by pressing both shoulder portions 92c, 92c formed above the vertical advance / retreat member 92 against the lower surface of the upper rail 120 from below. When the upper part of the slide door 100 is removed from the upper rail 120, the vertical advance / retreat member 92 is operated downward as shown in FIG.

  4 is a perspective view of the shock absorber 1 as viewed obliquely from above, FIG. 5 is a perspective view of the shock absorber 1 as viewed from obliquely below, FIG. 6 is an exploded perspective view of the shock absorber 1, FIG. Is a front view of the shock absorber 1, and (b) is a view showing the internal structure of the shock absorber 1 with the front half case removed. In this specification, as shown in FIG. 6, an arrow X direction that is a closing direction of the slide door is a front direction, and a direction opposite to the arrow X direction is a rear direction.

  The shock absorber 1 includes a spiral shaft 2, a holder 5 having a bearing portion of the spiral shaft 2, a slider 30 that is fitted on the spiral shaft 2 and rotates the spiral shaft 2 by moving along the axial direction of the spiral shaft 2. An oil resistance type rotary damper 18 that applies resistance to rotation in one direction of the spiral shaft 2 to slow the movement of the slider 30 in the forward direction, and an abutting member 16 provided at the front end of the spiral shaft 2. A receiving member 17 that makes the contact member 16 contact, and a damper spring 40 that urges the oil resistance type rotary damper 18 in the direction of the contact member 16.

  As shown in FIGS. 6 and 7 (a) and 7 (b), the spiral shaft 2 has a front end portion 3 and a rear end portion 4 formed of a small diameter shaft held by a holder 5, and is slightly in the axial direction. It is movable. Two spiral grooves 2 b and 2 c are formed on the outer peripheral surface 2 a between the front end portion 3 and the rear end portion 4 of the spiral shaft 2. The two spiral grooves 2b and 2c are formed at positions that are divided into two portions that divide the circumferential direction of the spiral shaft 2 into two equal parts, and this is performed between the spiral shaft 2 and the slider 30. The engagement, the movement of the slider 30 accompanying this engagement, and the rotation of the spiral shaft 2 are performed smoothly. A contact member 16 having an umbrella-like slope 16 a is provided at the front end 3 of the spiral shaft 2.

  As shown in FIGS. 6 and 7A and 7B, the holder 5 is formed of a casing that holds the spiral shaft 2 and is combined with half cases 5L and 5R. Bearing portions 8 and 10 of the spiral shaft 2 are formed in a half shape on the inner side surfaces of the half cases 5L and 5R. A spiral shaft arrangement portion 9 having a diameter larger than the diameter of the spiral shaft 2 is formed in a half shape on the inner surface of each of the half cases 5L and 5R between the front and rear bearing portions 8 and 10. . A notch 7 having an open top and a flat bottom surface is formed at the front portion of the bearing portion 8, and a screw hole 6 is formed in a half shape on the front inner surface thereof. A ball bearing holding hole 10a is formed at the end.

  The bearing portions 8 and 10, the spiral shaft arrangement portion 9, the screw hole 6, and the ball bearing holding hole 10a are all located on the same center line. The lower part of the part from the middle part near the rear part of the spiral shaft arrangement part 9 to the front end of the spiral shaft arrangement part 9 is opened. When the half cases 5L and 5R are combined, the lower part is opened below the spiral shaft arrangement part 9. Part 5S is formed. On the inner wall surfaces 11, 11 on both sides of the opening 5 </ b> S, guide portions 12, 12 made of flat grooves with shallow bottoms are formed long in the front-rear direction, and downward from the rear end portions of the guide portions 12, 12, Temporary stop guide portions 13 and 13 each having a flat bottom groove with a fan-shaped bottom surface are formed.

  8 (a) is a front view of the slider 30, FIG. 8 (b) is a right side view, FIG. 8 (c) is an exploded perspective view, and FIG. 8 (d) is a cross section taken along line AA in FIG. 8 (b). FIG. 8 (e) shows the slider 30 in a state where the hook member (locking portion) 34 faces the unlocking posture. The slider 30 includes a short cylindrical slider body 31 and hook members 34 and 34 connected to the slider body 31. The cylinder inner diameter of the slider main body 31 is large enough to smoothly come into sliding contact with the spiral shaft 2 shown in FIG. 6, and two strips formed on the spiral shaft 2 shown in FIG. Protrusions (engaging portions) 32 and 32 that enter the spiral grooves 2b and 2c are formed. The lower end portion of the slider main body 31 is a flat surface 31b, and the attachment portions 33 of the hook members 34 and 34 project from the central portion of the flat surface 31b downward. Then, hook members 34 and 34 are rotatably attached to both side surfaces of the attachment portion 33 via pins 35, respectively.

  Projections 36, 36 made of rectangular plate pieces are attached to the outer surfaces of the hook members 34, 34. Further, a spacer member 37 is mounted between the front portions of the left and right hook members 34, 34 attached to the attachment portion 33 to maintain the distance between the left and right hook members 34, 34, and the left and right hook members 34, 34. Pivots up and down. When the upper front end edges of the hook members 34 and 34 are in contact with the lower surface of the slider main body 31, the notched hook portions 34a and 34a are inclined rearward and downward at an angle of about 70 ° with the lower surface of the slider main body 31. Is directed to. This direction of the hook portions 34a, 34a is a direction for locking the locking projections 92a, 92a shown in FIGS. 2 (a) to 2 (c), and the hook portions 34a, 34a shown in FIG. 8 (e). This direction is a direction for receiving and releasing the locking projections 92a and 92a shown in FIGS. 2 (a) to 2 (c). As described above, the hook members 34 and 34 are rotatable within the range of the direction shown in FIG. 8E in which the front part is rotated downward from the direction shown in FIG. 8D.

  Since the hook member 34 can be rotated between the engagement maintaining posture and the unlocking posture, the posture can be switched smoothly and reliably. Further, since the hook member 34 can be temporarily stopped at the position of the unlocking posture, the sliding door can be received smoothly and reliably. Further, since the protrusion 36 is engaged with the guide portion 12 and the temporary stop guide portion 13, the hook member 34 can be reliably switched between the locking posture and the locking releasing posture.

  9 is a sectional view taken along line AA in FIG. 7A, and FIG. 10 is a sectional view taken along line BB in FIG. 7A. As shown in FIGS. 7B and 9, the left and right hook members 34, 34 are close to the inner wall surfaces 11, 11 of the opening 5 </ b> S formed in the lower part of the holder 5. Then, the protrusions 36 and 36 of the hook members 34 and 34 enter the guide portions 12 and 12 formed on the inner wall surfaces 11 and 11 of the opening 5S, and the engagement posture of the hook members 34 and 34 is changed. Is maintained. When the protrusions 36 and 36 are located in the temporary stop guide portions 13 and 13 shown in FIGS. 7B and 10, the left and right hook members 34 and 34 are in the unlocking posture.

  In the shock absorber 1, as shown in FIGS. 4, 5, 6, and 7 (b), the contact member 16 attached to the front end portion of the spiral shaft 2 is surrounded by the notch portion 7 of the holder 5. The receiving member 17 is fixed to the center upper surface of the notch 7 by being positioned at the front of the space. As shown in FIG. 6, an umbrella-shaped inclined surface 16 a is formed at the front portion of the contact member 16, and an inward umbrella-shaped inner inclined surface 17 a that faces the umbrella-shaped inclined surface is formed on the receiving member 17. An opening 17b is formed at the center. The spiral shaft 2 is movable to a position where the umbrella-like slope 16 a of the contact member 16 contacts the inner slope 17 a of the receiving member 17.

  On the upper surface of the front space of the notch 7 in front of the receiving member 17, an oil resistance type rotary damper 18 is disposed with the rotary shaft 22 facing rearward. As shown in FIGS. 6 and 7 (a) and 7 (b), the oil resistance type rotary damper 18 is received by the receiving member 17 by a damper spring 40 held in a screw hole 6 formed in the front end portion of the holder 5. It is urged to a position where it comes into contact with The damper spring 40 is supported forward by an embedded screw 41. The rotation shaft 22 of the oil resistance type rotary damper 18 passes through the opening 17 b of the receiving member 17, and the distal end portion of the rotation shaft 22 protrudes in the direction of the contact member 16.

  The contact member 16 and the receiving member 17 move forward while the contact member 16 rotates together with the spiral shaft 2, and the umbrella-shaped inclined surface 16 a of the contact member 16 contacts the inner inclined surface 17 a of the receiving member 17. The thrust damper 15 stops the forward movement of the spiral shaft 2. The thrust damper 15 not only has a function of receiving the forward movement of the spiral shaft 2 but also applies the slider 30 by instantaneously moving the spiral shaft 2 forward when an external force that moves the slider 30 forward is applied. It also has a cushioning function to reduce impact.

  FIGS. 11A and 11B are exploded perspective views of the oil resistance type rotary damper 18. As shown in FIGS. 11A and 11B, the oil resistance type rotary damper 18 is constituted by a damper case 19, a rotor 20, a cap 21, and a rotary shaft 22 assembled. The damper case 19 has a rectangular shape, and a circular concave step portion 19a is formed on one surface thereof. The rotor 20 is disposed in the recessed step portion 19a, and a rotating shaft main body 20a protruded from one surface of the rotor 20 is rotatably supported by a cap 21 that covers the recessed step portion 19a. The concave step portion 19a is filled with silicone oil, and the rotor 20 has a concavo-convex shape so that when the rotor 20 rotates, resistance due to stirring of the viscous silicone oil is added. The rotating shaft 22 is fitted with the rotating shaft main body 20 a of the rotor 20 and rotates together with the rotor 20.

  Next, the operation of the impact device configured as described above will be described with reference to the drawings. 12 is a front partial cross-sectional view showing the shock absorber 1 before the start of the shock absorbing operation, FIG. 13 is a front partial cross sectional view showing the shock absorber 1 in the middle of shock absorption, and FIG. FIG. 2 is a partial front sectional view showing the device 1. As shown in FIG. 12, in the state before the start of buffering, the slider 30 is in the unlocking position near the rear part of the spiral shaft 2, and the hook members 34, 34 are unlocked with their front parts turned downward. In posture. In the unlocking posture, the protrusions 36 and 36 are located in the temporary stop guide portions 13 and 13. And the front-end | tip part of the protrusions 36 and 36 is contact | abutted to the front end of the guide parts 13 and 13 for temporary stops, and the forward movement of the slider 30 is temporarily stopped.

  As shown in FIG. 13, the guide member 90 moves from the rear of the hook members 34, 34 (points to the right in the drawing), and the locking projections 92 a, 92 a formed on both side surfaces of the upper end of the guide member 90. When the hook members 34a and 34a enter the hook members 34 and 34, the hook members 34 and 34 are pressed forward by the locking projections 92a and 92a, and the front portions of the hook members 34 and 34 rotate upward. When the hook members 34, 34 are rotated in this direction, the protrusions 36, 36 move into the upper guide portions 12, 12, and there is no obstacle to restrict the forward movement of the slider 30, and the slider 30 is moved forward. It becomes possible.

  When there is no momentum in the forward movement of the slider 30, when the spiral shaft 2 is pushed forward by the slider 30, the abutting member 16 at the tip of the spiral shaft 2 moves forward while rotating, and the oil resistance type rotary damper 18 is in contact with the tip of the rotary shaft 22. A slope 22b is formed at the tip of the outer peripheral surface 22a of the rotary shaft 22, and the inner wall of the rotary shaft entry hole 16b formed on the front surface of the abutting member 16 can be in close contact with the slope 22b. A slope 16c is formed. When the rotating shaft 22 enters the rotating shaft entry hole 16b, the inclined surface 22b and the inner inclined surface 16c come into close contact with each other, and the rotation of the contact member 16 is transmitted to the rotating shaft 22. As a result, the rotation of the spiral shaft 2 is suppressed by the oil resistance type rotary damper 18, and the forward movement of the slider 30 becomes a slow speed.

  When there is momentum in the forward movement of the spiral shaft 2, the contact member 16 moves the rotation shaft 22 of the oil resistance type rotary damper 18 forward against the urging force of the damper spring 40 as shown in FIG. 14. The oil resistance type rotary damper 18 as a whole is retreated (leftward in the figure) and then collides with the receiving member 17. Since the time until the contact member 16 moves forward together with the spiral shaft 2 and the contact member 16 collides with the receiving member 17 is instantaneous, the guide member 90 vigorously collides with the hook members 34, 34. In addition, the slider 30 moves forward together with the spiral shaft 2, and this movement becomes a cushion that softens the impact of the collision. Thereby, the impact sound at the time of a collision can be made small, and the components of the drawing-in device 1 can be protected from this impact.

  When the abutting member 16 collides with the receiving member 17 and the momentum of the forward movement of the spiral shaft 2 and the abutting member 16 is lost, the entire oil resistance type rotary damper 18 is moved by the urging force of the damper spring 40. The inclined surface 22b of the rotating shaft 22 and the inner inclined surface 16c of the contact member 16 are brought into close contact with each other in a state where the contact member 16 is pushed back in the direction. Then, the rotation of the spiral shaft 2 is transmitted from the contact member 16 to the rotation shaft 22. As a result, the rotation of the spiral shaft 2 is suppressed by the oil resistance type rotary damper 18, and the forward movement of the slider 30 becomes a slow speed.

  Further, when the slide door 100 provided with the shock absorber 1 described above is attached to the slide door frame member 110, the hook members 34, 34 do not lock the locking projections 92a, 92a of the guide member 90. May have moved forward in the state. In this case, in order to lock the locking projections 92a, 92a to the hook members 34, 34, the slide door 100 is operated in the closing direction to move the guide member 90 forward. Then, the rear end edge portions of the hook members 34, 34 in the locking posture are formed as slopes, and the hook protrusions 92a, 92a come into contact with the slopes and push down the vertical movement member 92 downward while hook portions 34a. 34a, the locking projections 92a and 92a are locked to the hook member 34.

  Since the structure of the buffer mechanism 1 is simple as described above, the buffer mechanism 1 can be made strong. Further, the structure in which the slider 30 is fitted to the spiral shaft 2 does not disengage the spiral shaft 2 and the slider 30, and the center of the slider 30 and the axis of the spiral shaft 2 coincide with each other. Power transmission performed between 30 and the spiral shaft 2 can be performed smoothly. Since the rotary damper is constituted by the oil resistance type rotary damper 18, the rotational speed of the spiral shaft 2 can be surely made slow without causing noise, and the slide door 100 can be closed slowly. Further, since the rotation shaft 22 of the oil resistance type rotary damper 18 and the axis of the spiral shaft 2 are aligned, the rotation of the spiral shaft 2 can be transmitted smoothly and reliably to the rotation damper 18.

(Second Embodiment)
Next, a sliding door retracting apparatus according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 15 is an exploded perspective view of the retracting device, FIG. 16A is a front view of the retracting device, and FIG. 16B is an internal structural view of the retracting device when the front half case is removed. In addition to the configuration of the shock absorber according to the first embodiment, the retractor 200 includes a coil spring (biasing member) 29 that biases the slider 30 forward. 15 and 16 (a) and 16 (b), parts common to the shock absorber of the first embodiment are denoted by the same reference numerals.

  The coil spring 29 is fitted to the spiral shaft 2 so that the front end is in contact with the rear end surface of the slider body 31 and the rear end is in contact with the rear end edge of the spiral shaft arrangement portion 9 in the holder 5. ing. The coil spring 29 urges the slider 30 forward. The retracting device 200 is different from the shock absorber according to the first embodiment in which the slider 30 is moved forward by an external force in that the slider 30 is moved forward by the biasing force of the coil spring 29.

  Similar to the shock absorber according to the first embodiment, the retracting device 200 is attached to the upper rail of the slide door frame member to which the slide door is attached by screwing, for example. When the sliding door is moved in the closing direction and the guide member is locked to the hook member 34, the slider 30 is moved forward by the urging force of the coil spring 29. Pull 200 until the sliding door is closed. Since the drawing device 200 includes the buffer mechanism according to the first embodiment, the drawing device 200 is a strong drawing device having a smooth power transmission structure. Moreover, since the coil spring 29 which is an urging member is fitted to the spiral shaft 2 and a space for the urging member is not required, the retracting device 200 can be reduced in size.

(Third embodiment)
Next, a retracting device according to a third embodiment of the present invention will be described with reference to the drawings. 17 is an exploded perspective view of the retractor 300, FIG. 18 (a) is a front view of the retractor, and FIG. 18 (b) is an internal structural view of the retractor when the front half case is removed. The pull-in device 300 has the oil resistance type rotary damper 18 and the damper spring 40 removed from the configuration of the pull-in device according to the second embodiment, and includes a sliding clutch type rotary damper 15 </ b> A instead of the thrust damper 15. .

  In the pull-in device 300, the sliding clutch type rotary damper 15A performs the reception of the forward movement of the spiral shaft 2 accompanying the forward movement of the slider 30 and the rotation suppression of the spiral shaft 2. The sliding clutch type rotary damper 15A has the same structure as the thrust damper in the first embodiment, but the sliding contact is made while the contact member 16 is pressed against the receiving member 17, and the rotation of the spiral shaft 2 is suppressed by this frictional force. It differs from a thrust damper in that it has a new function.

  Since this pull-in device 300 is not provided with an oil resistance type rotary damper, the sliding contact surfaces of the contact member 16 and the receiving member 17 are worn out over a long period of use, and the rotation inhibiting action of the spiral shaft 2 is reduced. In addition, there is a risk that abnormal noise may be generated when the contact member 16 presses the receiving member 17 and makes sliding contact. However, since the number of parts can be reduced, it is inexpensive and strong. be able to. Since it is a simple structure that makes the rotation of the spiral shaft 2 slow by frictional resistance, the shock absorbing mechanism can be further strengthened.

(Fourth embodiment)
Next, a retractor according to a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 19 is a perspective view of the retracting device as viewed obliquely from above, FIG. 20 is a perspective view of the retracting device as viewed from obliquely below, FIG. 21 is a view showing the halved case on the front side of the retracting device, and FIG. It is the fragmentary front sectional view which showed the rear part of the drawing-in apparatus. The pulling device 400 removes the thrust damper, the damper spring that biases the oil resistance type rotary damper backward, and the coil spring that biases the slider from the configuration of the pulling device according to the second embodiment, and A spiral spring type urging device 70 is provided to apply an urging force to the rotation.

  The oil resistance type rotary damper 18 is fixed in a concave notch 7 formed in the front part of the holder 5, and as shown in FIG. 21, the rotary shaft main body 20a of the oil resistance type rotary damper 18 and The tip 2f of the spiral shaft 2 is connected. The spiral shaft 2 is rotatably held in the holder 5 without moving in the axial direction.

  The spiral spring type biasing device 70 is fixed in a concave notch 50 formed in the upper part near the rear end of the holder 5. As shown in FIG. 22, the spiral spring type urging device 70 is configured by assembling a spring case 71, a spiral spring 72, and a spring case lid 73. One end portion 72 a of the spiral spring 72 is locked to the spring case 71, and the other end portion 72 b of the spiral spring 72 is formed at the rear end portion 4 of the spiral shaft 2 that protrudes into the spring case 71. It is locked in the split groove 4g.

  The spiral spring 72 is wound by the rotation of the spiral shaft 2 in one direction accompanying the backward movement of the slider 30, and the spiral shaft 2 is rotated by the urging force in the rewind direction obtained by the winding. The slider 30 is moved forward along with the rotation of the spiral shaft 2. However, since the rotation of the spiral shaft 2 is suppressed by the oil resistance type rotary damper 18, the spiral shaft 2 rotates slowly. For this reason, the forward movement of the slider 30 also becomes slow, and retraction is performed at this speed. Since the structure is simple, the retracting device can be made strong, and the urging force can be smoothly transmitted to the spiral shaft.

  In addition, this invention is not restricted to the structure of the said various embodiment, A various deformation | transformation is possible in the range which does not change the meaning of invention. For example, the shock absorber and the retracting device of the opening / closing moving body are not limited to the sliding door, but may be used for a partition door, a hinged door, a furniture drawer, a curtain, or the like. In addition, you may use for the moving part of a machine and an electric product.

Industrial applicability

  The shock absorber and retractor of the opening / closing moving body of the present invention can be used for slide doors, partition doors, hinged doors, furniture drawers, curtains, and the like. In addition, it can be used for moving parts of machinery and electrical products.

Claims (8)

In the buffer mechanism that is disposed in the opening / closing moving body and slows down the closing operation of the opening / closing moving body,
A spiral shaft having a spiral groove or spiral convex shape on the side surface;
A holder having a bearing portion of the spiral shaft;
A slider that is fitted to the spiral shaft and rotates the spiral shaft by movement along the axial direction of the spiral shaft;
A rotation damper that provides resistance to rotation of the spiral shaft by movement of the slider along the axial direction and slows down movement of the slider in the closing direction of the opening / closing moving body;
A contact member provided at a front end portion of the spiral shaft or an intermediate shaft portion in the vicinity of the front end portion, and a receiving member for contacting the corresponding contact member,
On the inner side of the slider, there is provided an engaging portion that engages with the spiral groove or spiral convex shape of the spiral shaft,
The slider is provided with a locking portion for locking the opening / closing moving body that moves in the axial direction of the spiral shaft,
The rotary damper is a sliding clutch type rotary damper that slows the rotation of the spiral shaft by frictional resistance generated when the contact member is slidably contacted while being pressed against the receiving member.
The buffer mechanism for the opening / closing moving body, wherein the spiral shaft is held by the holder so as to be movable in the axial direction to at least a position where the contact member contacts the receiving member.   A retracting device for an opening / closing moving body comprising the buffer mechanism according to claim 1, further comprising a biasing member that biases the slider in a closing direction of the opening / closing moving body. The pulling device according to claim 2, wherein the biasing member is a coil spring fitted to the spiral shaft and having one end locked to the holder. The rotating damper includes a damper case supported by the holder;
A cap of the damper case;
Rotation having a rotation shaft protruding from one surface and rotatably disposed in the damper case, and the rotation shaft protruding outward from the damper case from a hole formed in the central surface of the cap With children,
An oil resistance type rotary damper in which rotation in at least one direction of the rotor receives a resistance of oil filled in the damper case and a rotation speed becomes slow.
The retraction device according to claim 2, wherein the rotation shaft is engageable with the spiral shaft.   A contact member provided at a front end portion of the spiral shaft, a receiving member that contacts the contact member, and a damper spring that urges the oil resistance type rotary damper to the contact member;
The spiral shaft is held by the holder so as to be movable in the axial direction of the spiral shaft;
The contact member has an umbrella-like slope,
The receiving member has an inner slope facing the umbrella-like slope of the abutting member and an opening portion aligned with the center position of the inner slope, and is fixed to the holder,
The oil resistance type rotary damper projects the rotation shaft from the opening of the receiving member to the contact member, and is biased toward the contact member by the damper spring,
When the spiral shaft is vigorously moved in the closing direction of the opening / closing moving body, the abutting member comes into contact with the rotating shaft to temporarily retract the oil resistance type rotary damper and further contacts the receiving member. The movement of the spiral shaft is stopped in contact, and immediately after that, the oil resistance type rotary damper is pushed back by the biasing force of the damper spring, and power is transmitted between the contact member and the rotary shaft. And the rotation of the spiral shaft is made slow by the oil resistance type rotary damper,
When there is no momentum in the movement of the spiral shaft in the closing direction, power is transmitted between the contact member and the rotating shaft without going through a process in which the contact member contacts the receiving member. 5. The retraction device according to claim 4, wherein the pulling device is configured so that the rotation of the spiral shaft is slowed down by the oil resistance type rotary damper. The retracting device according to claim 2, wherein the locking portion is freely rotatable between a locking maintaining posture for maintaining the locking of the opening / closing moving body and a locking releasing posture for releasing the locking. . The locking portion has a protrusion protruding outward on the side surface,
The holder has a guide portion that engages the protrusion and maintains the locking maintenance posture of the locking portion at a location along the inner wall surface of the opening formed in the lower portion,
The guide portion engages the protrusion with a rear end portion to maintain the locking portion in an unlocking posture, and temporarily stops movement of the locking portion in the closing direction. The retracting device according to claim 6, further comprising a guide portion. The shock-absorbing mechanism according to claim 1 is provided.
The holder has a spiral spring type biaser connected to the spiral shaft,
The spiral spring-type biasing device is wound with a spiral spring by the rotation of the spiral shaft when the slider moves in the opening direction of the opening / closing moving body,
A retraction device, wherein the spiral shaft is rotated in one direction by an urging force generated by rewinding the spiral spring.

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