JP2008163691A - Screw actuating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw actuating device which uses a power-accumulating force generated by a drive shaft and a power spring by using a screw of a large lead and which makes use of propulsive power by a driving function of the screw by collaborative action between them by a simple constitution. <P>SOLUTION: The screw actuating device is provided with the drive screw 11, a power transfer means, and a power-spring 24 type power-accumulating means 20. The drive screw 11 having a large lead is rotatably supported, and the power transfer means moves in the horizontal direction in parallel with the axis of the drive screw. A plurality of power-transfer rollers 17 which is engaged with the screw thread 11a of the drive screw 11 are arranged in the power transfer means. Then the power-accumulating means 20 and the axle of the drive screw 11 are connected to each other by a transmission mechanism, and the giving and receiving of power is performed by the power-accumulating means 20 and the power transfer means through the medium of the drive screw 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention combines a rotatable screw and a mainspring type power storage means, stores the rotational force acting on the screw in the power storage means, operates the screw with the rotational storage force, The present invention relates to a screw operating device that converts rotation into linear motion, and can smoothly move a moving body that mainly moves linearly.

  2. Description of the Related Art Conventionally, in an apparatus that reciprocates a required section, for example, an automatic door apparatus, the door is opened and closed by winding a chain or endless belt by a motor. For this purpose, the suspension tool is moved along the guide rail at a relatively low speed from the motor via the speed reducer inside the box structure, and the door attached to the suspension tool is opened and closed. ing. Such an endless belt drive type automatic opening / closing door device is known from Patent Document 1, for example. This automatic opening / closing door device has a structure in which a door can be opened and closed by running a door wheel attached to a hanging tool on a guide rail.

  Moreover, the thing of the structure which closes the opened door automatically with the restoring force of a coil spring is known by patent document 2, for example. In such a self-closing door device, an air damper that decelerates the closing speed immediately before closing the sliding door body, an electromagnetic brake that can stop the movement of the sliding door body in the closing direction, and a person when the sliding door body closes. Or it has a sensor which senses an object, and if the sensor senses a person or an object, it is a structure which holds a sliding door main body which moves in the direction closed according to a signal in a stop state.

JP 7-197731 A JP 2002-332775 A

  In the case of the belt-driven automatic door as described above, when the door suspension connected to the belt reaches the door movement limit, the drive is stopped by a limit switch, etc., and is stopped until the next door closing operation. Or after a certain period of time, it is reversely driven in the closing direction. However, in such a configuration, there is a problem that the drive belt extends and malfunctions due to frequent operation. In addition, since a control means is attached because of the need for a prime mover (motor) for driving, there is also a problem that it is inevitably expensive.

  Further, in the self-closing door device known from Patent Document 2, when the door is closed, when it approaches the closing end portion, it is stopped gently, or when the door is closed, a person or object is in the moving position of the door by a sensor. Since it is necessary to add a brake to detect and stop the running speed, it is necessary to adjust the brake to set the timing related to the braking. There is a problem of sticking to.

  The present invention has been made in view of such a situation, and uses a screw having a large lead to connect the support shaft and the mainspring spring, and uses a stored force by the mainspring spring, thereby having a simple configuration. It aims at providing the screw actuator which utilizes propulsion power by the drive function by a screw by cooperation action of both.

In order to solve such problems, the screw actuator according to the present invention is:
A drive screw having a large lead that is rotatably supported, a power transmission means in which a plurality of rollers engaging with a screw groove of the drive screw are arranged and moved in a horizontal direction parallel to the axis of the drive screw, and a mainspring; Spring-type power storage means,
The power storage means and the shaft portion of the drive screw are connected by a transmission mechanism, and power is transferred between the power storage means and the power transmission means via the drive screw. (First invention).

  In the present invention, the mainspring spring in the power storage means stores the power when the rotational force of the power transmission means is transmitted to the drive screw by the transmission mechanism, and the power is stored. It is good to be comprised so that a drive screw may be reversely rotated by being discharged | emitted (2nd invention).

  In addition, the transmission mechanism is connected so that rotational force is transmitted from the support shaft of the drive screw to the core shaft of the mainspring spring through the gear train, and is a detachable joint between the gear train and the support shaft. Is preferably provided (third invention).

  In the invention, the power accumulating means includes at least one mainspring spring on the core shaft inside a box-shaped frame that surrounds and surrounds a bearing member that supports the core shaft at both shaft necks. It is preferable that one end of the core shaft is movably connected to the power transmission mechanism (fourth invention).

  The mainspring spring in the power accumulating means is housed in a casing having one side surface orthogonal to the axis thereof opened so that the core shaft passes through the center, and the outer end portion is provided on the peripheral wall of the casing. The unit structure is configured such that the inner end is engaged with the core shaft and the rotational force is urged by being engaged with the cut portion, and the protrusion formed on the outer periphery of the casing is held. It is good to be comprised so that it may engage with a body and may be fixed (5th invention).

  In the fifth aspect of the present invention, the casing for housing the mainspring spring has a shape in which the closed side is provided with a step on the periphery with respect to the open side, and the closed-side step on the core shaft in a state in which the mainspring spring is accommodated. It is preferable that a plurality of the same open side of the same casing is fitted to the portion and a plurality of combinations can be arranged (sixth invention).

  Further, the power accumulating means in the invention is characterized in that the operating condition of the mainspring spring is made uniform within a box-shaped frame in which a casing housing the mainspring spring is provided with a watermark hole that engages a protrusion on the outer periphery thereof. It is preferable that at least one mainspring spring casing can be arranged in parallel on the core shaft, and the frame is mounted and arranged on a base member on which the drive screw is supported (seventh invention). ). Further, in the power storage means in the invention, it is preferable that a power storage force adjusting knob of a mainspring spring is attached to one end of the core shaft (eighth invention). The power storage means preferably has a unit structure, and the frame is mounted and disposed on a base member on which the drive screw is supported (ninth invention).

  According to the present invention, a drive screw supported in a freely rotatable manner and a mainspring spring type power accumulating means are connected by a transmission mechanism, for example, when used in a self-closing door device, the lead is opened by opening the door. The large drive screw is rotated by a plurality of power transmission rollers in the power transmission mechanism, and the mainspring is wound by the rotation of the drive screw to accumulate power. When there is no opening operation force applied to the door, the drive screw is driven to rotate by the rewinding action of the stored mainspring spring (release of the stored power), and the power transmission roller is driven in the reverse direction. The door connected to this is moved in the closing direction (automatically closing). At the time of this automatic door closing, the mainspring spring has a large energy storage force due to its characteristics, so the drive screw is rotated at a high speed and the door is quickly moved in the closing direction, but eventually approaches the end of the door closing. Since the unwinding force (accumulating force) of the mainspring spring is reduced as much as possible, the moving speed of the door is also slowed down, and it slowly reaches the end position and is closed. Therefore, when the door is closed, it can be closed quietly without colliding with the pillar, and the automatic closing can be achieved with a simple configuration without using a separate braking mechanism. Of course, in the state where the stored energy is attenuated when an external force is applied to the door, there is an advantage that the movement of the door in the closing direction is stopped and the object or person entering / exiting the entrance / exit is not harmed.

  Further, according to the present invention, the mainspring is used as the power accumulating means, and the mainspring spring and the drive screw are connected to each other by a conduction mechanism, whereby the power transmission means for converting the linear motion into the rotational motion is the forward and reverse. Power can be transmitted in the direction to effectively store and release power without using external power.

  Further, in the present invention, a mainspring spring used as a power accumulating means is accommodated in a casing, its power release (input) side is connected to a core shaft, and the casing is formed in a box-shaped frame. Thus, the structure is such that the protrusions on the outer periphery of the casing and the open holes on the frame side are aligned and stored and held, so that a plurality of mainspring spring units can be arranged to increase the power. At this time, since the input and output of all the mainspring springs can be made uniform, the accumulated energy of the rotational power can be increased without variation and the handling can be facilitated.

  In addition, in this invention, it has the convenience which can carry out the increase expansion of motive power by increasing the number of mainspring springs with equivalent ability corresponding to the motive power which takes out the mainspring spring used as motive power storage means. . Further, since the stored energy can be adjusted by adjusting the spring of the mainspring, there is an advantage that the adjustment can be easily performed by rotating the core shaft using the adjustment knob. Furthermore, since the power accumulating means by the mainspring spring can be unitized, there is an advantage that if a space to be used can be secured, replacement due to a failure or the like is easy.

  Next, a specific embodiment of the screw actuator according to the present invention will be described with reference to the drawings.

  1 is a front view showing the self-closing door opening and closing device of the present embodiment, FIG. 2 is a longitudinal sectional view of the screw operating device of the present embodiment, and FIG. 3 is an external front view of the screw operating device, 4 is a cross-sectional view (a) showing the mainspring spring mounting portion of the power accumulating means and a cross-sectional view (b) in the case of driving in the opposite direction, and FIG. 5 is an outline view showing the casing for housing the mainspring spring. a) and a central longitudinal sectional view (b) in a state where the mainspring spring is accommodated in the casing, FIG. 6 is a sectional view showing a door running portion of the door device which is self-closed by a screw operating device, and FIG. A front view with the cover of the energy storage means opened is shown.

  The screw operating device 10 of this embodiment will be described as applied to the self-closing door opening and closing device 1. This door opening and closing device 1 is provided at the entrance of a building, and is a hanging guide member 3 of a sliding door attached horizontally along the lower side of the duck 2 (see FIG. 6), and a guide rail in the hanging guide member 3 4 and 4, a door suspension wheel 5 that suspends and moves the sliding door (door 40), and a screw actuator 10 that is installed at an appropriate position of the suspension guide member 3 to perform the self-closing operation of the door 40. It is configured.

  As shown in FIG. 6, the suspension guide member 3 has a rectangular outer shape, and includes a partition wall 3 a that is vertically divided at an intermediate portion in the vertical direction, and a vertical axis center line below the partition wall 3 a. Guide rails 4 and 4 for guiding the rollers 5a and 5a of the door suspension 5 formed in a bowl shape at the lower end symmetrically inward with respect to a, and a guide for the power transmission arm 16 projecting sideways at the upper part Rails 6 and 6 are provided. In addition, on the upper side of the partition wall 3a, the drive screw 11 of the screw operating device 10, the power accumulating means 20, and related devices can be accommodated, and one side surface portion is opened, and this side surface portion is attached / detached. A possible cover 8 is attached.

  As shown in FIGS. 1 to 4, the screw operating device 10 is assembled so as to be slidable in the axial direction within a drive screw 11 formed by a large lead having a wide groove 11 a and a shaft hole 11 c of the drive screw 11. The rotational force is converted into a linear motion by engaging the power transmission roller 17 with the support shaft 12, the power storage means 20 connected to the support shaft 12 and storing the power, and the groove 11a of the drive screw 11. The power transmission arm 16 is configured to close (open) the door 40.

  The drive screw 11 is disposed on the upper surface of the partition wall 3a in the suspension guide member 3 via shaft support brackets 13 and 13 'disposed on both sides by a support shaft 12 penetrating a shaft hole 11c formed in the shaft center. Has been. And it arrange | positions so that the downward downward part of this drive screw 11 may protrude below from the opening part provided in the partition 3a. The support shaft 12 penetrating the shaft hole 11c is coupled in a spline structure so as to be slidable in the axial direction and to transmit power by rotating in the rotational direction. Furthermore, a coil spring is fitted on both ends of the drive screw 11 so as to be fitted to the support shaft 12 and one end is in contact with the collar 14 in contact with the side surfaces of the shaft support brackets 13 and 13 'and the other end is in contact with the end of the drive screw. 15 (buffer springs) are arranged so that when an overload in the axial direction acts on the drive screw 11, the drive screw 11 moves backward in the direction of action according to the load and no failure occurs. Yes.

  The groove 11 a of the drive screw 11 thus configured has power that is guided by the upper guide rails 6, 6 and is movable in the axial direction parallel to the axis of the drive screw 11 inside the suspension guide member 3. A plurality of power transmission rollers 17 disposed on the transmission arm 16 are engaged with each other, and the power transmission arm 16 is moved through the power transmission roller 17 by the rotation of the drive screw 11.

  The power transmission roller 17 is arranged on the upper surface of the power transmission arm 16 with a plurality of shafts rotatably supported at a pitch matching the lead of the groove 11 a of the drive screw 11. The power transmission arm 16 including the power transmission roller 17 is formed with a length slightly shorter than the width of the door 40 and engages with guide rails 6 and 6 provided on the suspension guide member 3 at appropriate positions. A plurality of guide rollers 18 to be guided are arranged. In this state, each power transmission roller 17 on the power transmission arm 16 is engaged with the groove 11a of the drive screw 11 so that power can be transmitted.

  The power transmission arm 16 is provided with a shaft pin hole 16b so as to be connected to the vertical center shaft 5b of the door suspension 5 and is connected to one door suspension 5 through the shaft pin hole 16b. 40 can be moved.

  The power storing means 20 includes a mainspring 24 formed in a unit structure, a box frame that supports the mainspring 24, and a core shaft 22 that transmits power to the mainspring spring 24 or extracts stored power. A power transmission gear 26 is provided at one end of the core shaft 22.

  As shown in FIGS. 4 and 5, the mainspring spring 24 is accommodated in a bottomed cylindrical casing 23 whose one side surface is opened, and an outer end portion is provided with a cut portion provided on a peripheral wall of the casing 23. The inner end is engaged with a slit 22 a provided in the core shaft 22. The casing 23 is an internal method capable of accommodating a mainspring 24 wound in a required width and capable of maintaining a stored energy, and a through hole 23e of the core shaft 22 is formed at the center of the closed side plate 23d, so that the peripheral wall A protrusion 23b is formed on the outer surface to be fixedly held on the box-shaped frame at a symmetrical position, and a protruding piece 23a protruding from the peripheral surface at a position displaced by 90 ° from the protrusion 23b is provided at the symmetrical position. In this structure, the protruding piece 23a can be brought into contact with the inner surface to retain the shape. The casing 23 formed in this manner is arranged such that a plurality of casings 23 can be arranged in close contact with each other on the coaxial line by fitting a step 23d ′ formed on the periphery of the closed side plate 23d of the separate casing 23 into the opening. Has been.

  When the power storage means 20 releases the stored power in the opposite direction to that described above, for example, as shown in FIG. 4 (b), the winding direction of the mainspring spring 24 is reversed so that the core shaft If both end portions are attached to the notch portion 23c of the casing 22 and the casing 23, the door end side of the door can be left or right. In addition, when a plurality of such structures are incorporated, a draw door (double door) can be employed in a self-closing manner.

  Both ends of the core shaft 22 are supported by left and right brackets 21 and 21 '(corresponding to bearing members of the present invention) arranged at a required interval inside the box-shaped frame, and power is transmitted to one end thereof. A gear 26 is fixedly attached, and a knob 27 for adjusting the winding of the mainspring spring 24 is attached to the other end. Further, the slit 22a for engaging the inner end of the mainspring spring 24 has a length corresponding to the number of the mainspring springs 24 arranged on the shaft from the other end of the core shaft 22 on the shaft core wire. 24 is provided in such a size that a spring plate forming 24 can be inserted.

  The box-shaped frame 29 is formed of a part of an inverted L-shaped frame 10a incorporated in a suspension guide member that substantially supports the entire screw operating device 10 and an L-shaped thin plate facing the frame 10a. The cover member 28 is combined. The box-shaped frame 29 is suitable for arranging the brackets 21, 21 ′ for supporting the core shaft 22 therein and the mainspring springs 24 accommodated in the casing 23 on the core shaft 22. Opening holes 10b, 28a having a horizontally long rectangle are formed on two side surfaces (specifically, the upright portion of the frame 10a and the upright portion of the cover member 28) that are formed in a rectangular parallelepiped shape and are parallel to the core shaft 22. It is provided. The open holes 10b and 28a are adapted to hold the casing 23 around the core shaft 22 in a fixed state so that the projections 23b and 23b of the casing 23 housing the mainspring spring fit into each other. The cover member 28 constituting the box-shaped frame is attached to the brackets 21 and 21 'fixed to the frame 10a and the frame 10a so as to surround the inside.

  Such power accumulating means 20 is fixed at a position slightly away from the position of the drive screw 11 on the upper surface of the partition wall 3 a of the suspension guide member 3. The power accumulating means 20 and the drive screw 11 have a gear 32 attached to the end of the transmission shaft 31 supported by a bracket 21 at the end of the transmission shaft 31 that extends the support shaft 12 of the drive screw 11. The drive screw 11 and the mainspring spring 24 are connected by meshing with a gear 26 attached to the core shaft 22. The support shaft 12 of the drive screw 11 and the transmission shaft 31 are detachably connected by a joint 33. Further, in the power storage means 20, when a large stored power is required, two or three springs 24 of the same condition are added and arranged on the core shaft 22 in the same manner as described above. Can be enlarged. Further, in order to adjust the stored force of each mainspring spring 24, both shafts are separated by a joint 33 connecting the transmission shaft 31 and the support shaft 12, and then the adjustment is applied to the other end of the core shaft 22. This can be achieved by adjusting the winding of the mainspring spring 24 with the knob 27. In FIG. 7, reference numeral 30 denotes a lid plate that closes the terminal opening of the casing 23.

  In the screw operating device 10 configured as described above, in the initial stage of use, it is confirmed that the door end side of the door 40 hits the vertical frame of the three-way frame, and the mainspring spring 24 of the power accumulating means 20 is in the maximum power release state. Then, when the door 40 is fully opened, the mainspring spring 24 of the power accumulating means 20 is set to be most retracted and maintained in the maximum accumulating state. In other words, the door 40 is positioned so that power release can be activated when the door 40 is fully open.

  When the door 40 is released from the stopped state in this state, the drive screw 11 engaged through the power transmission roller 17 of the power transmission arm 16 connected to the door suspension wheels 5 and 5 on which the door 40 is supported is stopped. Since the restraining force that has been removed is removed, the stored power of the mainspring spring 24 of the power storage means 20 is released, the mainspring spring 24 is loosened, and the core shaft 22 rotates. The support shaft 12 of the drive screw 11 is rotated through the transmission shaft 31 by the gear 32 engaged with the gear 26 attached to the end of the core shaft 22 by rotation. Accordingly, the drive screw 11 is rotated, the power transmission roller 17 engaged with the groove 11a of the drive screw 11 is moved by the lead of the screw, and the power transmission arm 16 advances. Since the plurality of power transmission rollers 17 are sequentially engaged with the groove portion 11a as the drive screw 11 rotates, the door suspension wheels 5, 5 connected to the power transmission arm 16 travel on the guide rails 4, 4. The suspended door 40 moves in a direction to close the doorway. That is, the drive screw 11 is rotated by the power by which the energy stored in the mainspring spring 24 is released and the core shaft 22 is rotated, and the plurality of power transmission rollers 17 to be engaged are sequentially moved linearly and connected to the power transmission arm 16. 40 is moved in the closing direction.

  The movement of the door 40 in the closing direction moves (runs) quickly because the stored energy is large from the initial activation of the mainspring spring 24 to about the intermediate position, but is involved in the release of the stored energy. As the mainspring 24 is gradually expanded, the stored force is attenuated, so that the driving force is reduced and the traveling speed of the door 40 is also reduced. Therefore, the door 40 gradually moves and stops closing as it approaches the closing end. As a result, the column (vertical frame) and the end of the door 40 do not collide violently at the time of closing, and can be closed in a state of naturally closing. In addition, the door can be closed silently without the occurrence of collision noise. Further, even if an object or a person may come into contact with the door 40 before closing, the door 40 stops in a so-called hitting state by the contact, and is not sandwiched between the door 40 and the pillar. No injury.

  Next, when opening the door 40, since the power transmission roller 17 of the power transmission arm 16 attached to the door 40 side is engaged with the groove 11a of the drive screw 11 as described above, the lead of the groove 11a is large. The drive screw 11 is rotated reversely by an action force in the straight direction applied to the power transmission roller 17 by an operation of opening the door 40 by hand contrary to when the door is closed. Therefore, the reverse rotation of the drive screw 11 causes the core shaft 22 of the power accumulating means 20 to reversely rotate from the support shaft 12 via the transmission shaft 31, so that the mainspring spring 24 is wound, and the power is accumulated in the mainspring spring 24. The

  Therefore, the door 40 moved in the opening direction releases the power stored in the power storage means 20 at that time when the force that has been urged in the opening direction by passing a person or an object through the doorway is removed. As a result, the door 40 is self-closed as described above. Further, even when an excessive thrust acts on the drive screw 11 at both operating ends when the door 40 is opened and closed, coil springs 15 (buffer springs) are interposed at both ends of the drive screw 11, Moreover, since the drive screw 11 is slidable on the support shaft 12, it slides in the axial direction and is buffered without difficulty. Even if the drive screw 11 moves in the axial direction, the drive screw 11 is pushed back by the repulsive force of the compressed coil spring 15 to return to the equilibrium state, and does not hinder the next operation.

  As described above, according to the screw operating device 10 of the present invention, by combining the power accumulating means 20 using the mainspring spring 24 and the drive screw 11 capable of converting the rotational motion into the linear motion, the above-mentioned power is not required and no additional power is required. If it is used for a self-closing door device like this, a method that requires a lot of work in production, such as a conventional method of self-closing by gravity using an inclined guide rail, or a method that requires an electromagnetic brake for braking Such a special configuration or electrical equipment is not required, and a suitable self-closing door device can be obtained with a simple configuration, and safety can be easily ensured.

  The screw operating device 10 described above has been described with respect to the type incorporated under the gate 2 of the entrance / exit, but in addition to this, as shown in FIGS. 8 and 9, for example, the inside of the entrance / exit of the building (For example, indoor side) Along with the upper entrance of the entrance such as the Kamoi 2, the guide rails 6 and 6 incorporated in the casing 35 having a required length and the externally mounted self-actuating device 10A similar to the above-described configuration are set. It can also be employed as a closed door device. In this type, a grooved receiving bracket 36 is attached to the inner side surface of the door 40 that opens and closes, and protrudes from the part of the power transmission arm 16 of the screw operating device 10A toward the door 40 so that the groove 36a of the receiving bracket 36 is provided. By providing the driving projection piece 37 that is engaged with the front end portion of the driving projection piece 37 and the groove portion 36a of the receiving metal fitting 36, the function described above can be achieved. It can be demonstrated. Note that the screw operating device 10A in the externally-closed self-closing door device has the same configuration as that of the above-described embodiment, and therefore, detailed description is omitted, and the structure appearing in the figure is described above. The same reference numerals as those in FIG.

  In addition to the single-opening self-closing door device described above, the screw operating device 10 according to the present invention can be employed in a draw (double-opening) self-closing door device. One embodiment of this draw-type self-closing door device is shown in FIG.

  The screw actuating device 10B in this draw-type self-closing door device is the same as the above-described screw actuating device 10 in the basic configuration, but the right-hand drive screw 11 and the left-hand screw for the left and right doors 40, 40, respectively. And a power transmission means for opening and closing the door corresponding to these drive screws 11 and 11 ′, respectively, and the power storage means 20 is attached to only one of the drive screws 11. Yes. Then, the drive screw 11 directly connected to one of the power storage means 20 is connected to the other drive screw 11 ′ so that power transmission / reception is transmitted synchronously by the line shaft 45. Since other configurations are the same as those described above, detailed description thereof will be omitted.

  The screw operating device 10B according to the present invention configured as described above is attached to the top of each door when the left or right door 40, 40 is opened by hand using a draw (double-opening) self-closing door device. The drive screws 11 and 11 'are rotated by the power transmission roller 17 of the power transmission arm 16 as described above. Then, the rotational force is transmitted to the mainspring spring of the power accumulating means 20 connected to one of the drive screws 11, and the mainspring spring is engulfed to accumulate the power. Therefore, when the acting force in the opening direction no longer acts on the doors 40, 40 and the deterring force is removed, the rotational force stored in the power storage means 20 is released, and the left and right drive screws 11, 11 'are released. The doors 40 and 40 are simultaneously closed by the power transmission arms 16 and 16 via the power transmission rollers 17 engaged with the drive screws 11 and 11 ′, simultaneously reversely rotated by the rotational power release operation of the mainspring spring. Move to and close the doorway.

  Thus, the draw-type self-closed door device operates in the same manner as the single-open self-closed door device of the above-described embodiment, and the draw-type doors 40 and 40 move twice. The door 40, 40 can be effectively opened and closed with a small amount of movement.

  The above describes the screw operating device according to the present invention used for a self-closing door device. However, in accordance with the gist of the present invention, the operation of advancing and retracting and decelerating immediately before the end position of one of the operations is described. This is more effective because it requires no additional power.

  In the above description, the embodiment used in the self-closing door device has been described. However, in addition to this, for example, when used in a device that automatically closes after being opened as an opening / closing device, it can function effectively.

Front view showing the self-closing door opening and closing device of the present embodiment Longitudinal sectional view of the screw operating device of the present embodiment External view of screw actuator Sectional view (a) representing the mainspring spring mounting portion of the power storage means and sectional view (b) in the case of reverse driving FIG. 5 shows an outline view (a) showing a casing for accommodating the mainspring spring, and a central longitudinal sectional view (b) of the state in which the mainspring spring is accommodated in the casing. Sectional drawing showing the door traveling part of the door apparatus self-closing by this screw actuator Front view with power storage means cover open External view of a door showing an externally attached self-closing door device Expanded longitudinal sectional view of the main part of the externally mounted self-closing door device The figure showing one mode of a draw-type self-closing door device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Self-closing door opening and closing device 2 Kamoi 3 Hanging guide member 4,6 Guide rail 5 Door suspension wheel 10,10A, 10B Screw actuator 10a Frame 11,11 'Drive screw 11a Groove part of drive screw 12 Support shaft 15 Coil spring (Buffer spring)
DESCRIPTION OF SYMBOLS 16 Power transmission arm 17 Power transmission roller 20 Power storage means 21,21 'Bracket 22 Core shaft 23 Fixed shaft 24 Mainspring spring 26,32 Gear 27 Knob for entrainment adjustment 28 Cover 31 Transmission shaft 33 Joint 35 Casing 36 Bracket 37 Drive protrusion piece 40 Door 45 Line shaft

Claims (9)

A drive screw having a large lead that is rotatably supported, a power transmission means in which a plurality of rollers engaging with a screw groove of the drive screw are arranged and moved in a horizontal direction parallel to the axis of the drive screw, and a mainspring; Spring-type power storage means,
The power storage means and the shaft portion of the drive screw are connected by a transmission mechanism, and power is transferred between the power storage means and the power transmission means via the drive screw. A screw actuator characterized by comprising: The mainspring spring in the power accumulating means stores the power when the rotational force of the power transmission means is transmitted to the drive screw by the transmission mechanism and is entrained, and the accumulating force of the mainspring spring is released. The screw actuator according to claim 1, wherein the drive screw is configured to be driven to rotate in reverse. The transmission mechanism is connected so that rotational force is transmitted from the support shaft of the drive screw to the core shaft of the mainspring spring through the gear train, and a detachable joint is provided between the gear train and the support shaft. The screw operating device according to claim 1 or 2. The power storage means is provided with a bearing member that pivotally supports the core shaft at both shaft necks, and at least one mainspring spring is disposed on the core shaft inside the frame of a box structure that surrounds the bearing member. The screw operating device according to claim 1 or 2, wherein one end of the core shaft is dynamically connected to the power transmission mechanism. The mainspring spring in the power accumulating means is housed in a casing whose one side perpendicular to the axis is opened so that the core shaft passes through the center, and the outer end is a notch provided in the peripheral wall of the casing The unit structure is configured such that the inner end is engaged with the core shaft and the rotational force is biased, and the protrusion formed on the outer periphery of the casing is used as the holding structure. The screw actuator according to any one of claims 1, 2, and 4, wherein the screw actuator is configured to be engaged and fixed. The casing for housing the mainspring spring has a shape in which the closed side is provided with a step on the periphery with respect to the open side, and the same casing is opened on the closed-side step on the core shaft in a state in which the mainspring spring is accommodated. The screw operating device according to claim 5, wherein a plurality of combinations can be arranged by fitting the sides. The power accumulating means is configured such that a casing containing the mainspring spring has a constant operating condition of the mainspring spring in a box-shaped frame provided with a watermark hole that engages a protrusion on the outer periphery thereof. 6. A structure according to claim 1, wherein the mainspring spring casing is arranged so as to be arranged in parallel on the core shaft, and the frame is mounted and arranged on a base member on which the drive screw is supported. A screw actuator according to any one of the above. The screw operating device according to any one of claims 1, 2, 4, 5, 6 and 7, wherein the power accumulating means is provided with a spring spring accumulating force adjusting knob at one end of the core shaft. 9. The power storage unit according to claim 1, wherein the power storage means has a unit structure, and the frame is mounted and disposed on a base member on which a drive screw is supported. A screw actuator according to claim 1.

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