JP2014201976A - Pull-in device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pull-in device capable of changing pull-in force in the middle of the movement of a sash, in the pull-in device for pulling the sash in the vertical frame side by accumulated energy, when opening-closing the sash such as a sliding door and a sliding sash.SOLUTION: The energy is accumulated when opening a sash 6, and the sash is pulled in by consuming this energy when closing. An energy accumulation device comprises a spiral rod 44 having a screw part 43 and a torsion spring 45. The spiral rod is pulled out of a case 41 when opening the sash, and is pulled in the case when closing the sash. A lead of a screw part of the spiral rod changes from the middle so that the lead of a pull-out starting section band from the case becomes small and a pull-out finish section band becomes large.

Description

  The present invention relates to a retracting device that automatically retracts a shoji close to a closed position or a fully open position to the frame side of the frame when opening and closing the shoji of a sliding door, a sliding sash, etc. (hereinafter referred to as a sliding door sash). .

  There is known a sliding door retracting apparatus that automatically retracts the sliding door sash shoji to the closed position or the fully opened position toward the frame side of the frame (see, for example, Patent Documents 1 and 2). This retraction device accumulates energy in the main body of the retractor when moving the shoji away from the frame of the frame, for example, in the direction of opening the shoji, and at the stage of approaching the frame of the frame when closing. It acts on the shoji and is pulled to the side of the heel frame. Specifically, for example, as shown in Patent Document 1, the retracting device includes an engaging means (a retracting device main body) and a hook body (dog), and either member is attached to the upper upper part of the shoji. The other member is attached to the lower part of the upper frame of the frame. The engaging means is provided with a locking body (clutch cam) having a flange so as to be movable in the opening / closing direction of the shoji and capable of falling, and a spring is stretched between the locking body and the main body of the engaging means. Yes. The case where the retractor is operated when the shoji is closed will be described as an example. In the closed state of the shoji, the locking body stands up and the hook is engaged with the hook. When the shoji is moved in the opening direction, the locking body and the hook portion are engaged with each other in the first stage, so that the locking body is relatively moved in the closing position of the shoji as the shoji moves in the opening direction. Move in the direction. As a result, the spring provided between the main body and the locking body is extended. When the latching body moves to a predetermined position, the latching body falls down and disengages from the hook portion, and the latching body is restrained at that position, so the spring is held in an extended state. And energy is stored in the spring. Moreover, the above-mentioned shoji becomes free when the engagement between the hook portion and the hook portion of the locking body is released, and the shoji can be moved to the fully open position. When the shoji is moved from the open position in the closing direction, the hook part comes into contact with the hook part of the latching body in the middle of the movement, and the latching body is turned upright to engage the hook part and the latching body. . As a result, since the spring starts to shrink, the shoji is drawn toward the frame of the frame by the energy accumulated in the spring and comes into contact with the frame.

  As described above, when the shoji is opened and closed, the spring is used as an energy storage device to store energy, and by releasing the energy, the shoji can be automatically retracted. Since it is a coil spring or a compression coil spring, there is a problem. In other words, since the tension coil spring and the compression coil spring have a proportional relationship between the load and the deformation amount, the load increases linearly when the deformation amount of expansion or contraction increases. Considering this relationship when a retractor using a tension coil spring generates a pulling force when the shoji is closed, when the shoji is opened (when energy is stored), the opening of the shoji starts when the spring opens (the amount of deformation). ) Is small, the opening force for moving the shoji is small, but when the hook part is released from the locking body, the spring is fully extended, so the amount of deformation increases, and the shoji moves with a large opening force. You will need it. Conversely, when closing the shoji (when consuming the stored energy), if the shoji moves to a position where the latching body engages with the hook and the latching body can move relatively, the pulling force on the shoji Is applied and self-closing begins, and at this time, the largest closing force (retraction force) is generated. Therefore, in the conventional device, the closing speed at the beginning of retracting the shoji becomes faster, and if a large braking force is not applied, the shoji moves suddenly and a part of the body is sandwiched between the shoji and the saddle frame, resulting in injury. There is a risk. Furthermore, the contact structure between the shoji and the heel frame is often configured to seal the shoji to the heel frame for the purpose of heat insulation and noise reduction. In the vicinity of the position, the spring contracts and the closing force (retraction force) becomes weak, so that it is likely to cause a situation where the shoji cannot be closed completely.

  As described above, since the conventional retracting device uses a tension spring or compression spring as an energy storage mechanism, a small closing force (retraction force) can be used to start closing the shoji, but a large closing force is required. When the shoji comes in contact with the heel frame, a large closing force (retraction force) is required, but only a small closing force can be generated. Although a spring tension adjusting mechanism is known as shown in Patent Document 1, this adjusting mechanism adjusts the tension of the entire spring, and changes the pull-in force from the middle of the moving process of the shoji. It is not a thing. Further, as shown in Patent Document 2, there is also known a mechanism for reducing the moving speed of the shoji by providing a damper near the closing position of the shoji. However, in this mechanism, when the shoji comes into contact with the heel frame, a further pulling force is provided. Becomes smaller and the shoji cannot be brought into close contact with the frame.

Japanese Patent No. 3929163 (Claim 1, paragraphs 0027 and 0031, drawings) Japanese Patent No. 4039671 (Claim 1, Drawing)

As described above, the present invention provides a sliding door sash retracting device that can change the retracting force acting on the shoji in the initial stage and the final stage of movement when the shoji is moved by the retracting force. It is to be.
As described above, the retracting device can be used not only when closing the shoji using the retracting force as the closing force but also when opening the shoji by applying the retracting force as the opening force. The present invention aims at an apparatus that can be used in any case.

  According to the present invention, the pulling device main body and the dog are provided, and one member of the pulling device main body and the dog is provided on the frame or the shoji that opens and closes within the opening surrounded by the frame, A member is provided on the shoji or frame, a clutch cam that can be engaged with the dock, movable in the opening / closing direction of the shoji, and can be flipped over the retractor body, and the clutch cam engages with the dog and the shoji Has an energy storage device that stores energy up to a position where the clutch cam falls and disengages from the dog by moving in a direction away from the frame frame frame, and the shoji is closer to the frame frame frame. When the clutch cam is engaged with the dog when the clutch cam is engaged, the energy storage device consumes the stored energy and pulls the shoji in the frame frame direction of the frame body. The pulling force is weak at the beginning of retracting the shoji, and the pulling force is changed during the movement of the shoji so that the pulling force is larger than the initial pulling force when the shoji is close to the frame. A retraction device is provided.

  Further, according to the present invention, the energy storage device rotates the rotation guide by the rectilinear movement of the spiral rod having the threaded portion to wind the torsion spring, or rotates the rotation guide by the rewinding of the torsion spring to move the spiral rod straight. A spiral rod mechanism to be moved, and the spiral rod is connected to a clutch cam, and the force to move the spiral rod straight is weak at the beginning of drawing the shoji by changing the lead of the screw portion of the spiral rod. However, the retracting device is characterized in that the stirrer is retracted by linearly moving the spiral rod with a greater force than the initial stage of retracting at the stage close to the collar frame.

  The spiral rod mechanism includes a cylindrical case, a cylindrical rotation guide that is rotatably provided at the tip end side of the case, and a thread portion that penetrates the slit of the rotation guide in a screwed state. A spiral rod provided so as to be able to be pulled out from the case; and a torsion spring that is fitted on the outer periphery of the spiral rod and has one end connected to the base end of the case and the other end connected to the rotation guide. The shoji is pulled into the case in contact with the saddle frame, and is connected to the clutch cam so that the shoji is pulled out of the case when moving in a direction away from the saddle frame, and the lead of the screw portion of the spiral rod The lead of the start zone at the beginning of pulling out from the case is formed small, and the lead of the end zone at the end of withdrawal is larger than the lead of the start zone The retraction device is provided, characterized in that it is.

  Further, according to the present invention, the pull-in device main body has a guide provided in the main body, and a slider that is movable in the opening / closing direction of the shoji along the guide and that incorporates the clutch cam so as to fall down. The clutch cam is pivotally attached to the slider and has a cam shaft that slides along the guide so as to hold the clutch cam in an upright state. The cam shaft is inserted into the guide so that the clutch cam is turned over. The pull-in device is provided in which a return-preventing groove to be locked is formed, and a tip of a spiral rod is connected to the slider.

  Further, the retracting device main body is provided with a braking device that applies a braking force to the movement of the slider, the slider is provided with a rack gear that can be engaged with the pinion gear of the braking device, and the starting end zone of the spiral rod is The above-described retracting device is provided over a zone where the rack gear and the pinion gear are disengaged and the shoji is moved toward the saddle frame.

  The present invention is configured as described above, and has a retracting device main body and a dog, and the sliding device that opens and closes one member of the retracting device main body and the dog within the frame body or the opening surrounded by the frame body. The other member is provided on the shoji or frame, and the pull-in device main body is engaged with the dock, is movable in the opening / closing direction of the shoji and can be turned over, and the clutch cam is engaged with the dog. In addition, there is an energy storage device that stores energy until the shoji moves away from the frame frame of the frame and the clutch cam falls and disengages from the dog. When the clutch cam engages with the dog by moving in the direction approaching the frame, the energy stored is consumed and the shoji is drawn in the frame direction of the frame body. The ghee storage device has a weak pull-in force at the beginning of retracting the shoji and changed the pull-in force during the movement of the shoji to produce a pull-in force greater than the initial pull-in force when the shoji is close to the frame. When the shoji is moved by the pulling force generated by consuming the accumulated energy, the shoji moves with a weak pulling force at the first stage, and there is no possibility of pinching the body or the like between the shoji and the heel frame. In addition, since a large pulling force is generated in the shoji when the shoji comes close to the saddle frame, the shoji can be brought into close contact with the saddle frame.

  Further, as the energy storage device, a spiral rod having a threaded portion is provided so as to be able to protrude and retract in the case, and the torsion spring is wound by rotating the rotation guide by the linear movement when the spiral rod is pulled into the case. Using a spiral rod mechanism in which the rotation guide is rotated by rewinding so that the spiral rod moves linearly and is pulled out from the case, the spiral rod is drawn into the case with the shoji in contact with the heel frame, The shoji is connected to the clutch cam so as to be pulled out of the case when the shoji moves away from the frame. Then, by changing the lead of the screw portion of the spiral rod, in the starting end zone where the spiral rod starts to be pulled out from the case (the zone where the spiral rod is pulled into the case), the lead is reduced and the force for pulling the spiral rod is increased. In the terminal zone where the spiral rod is pulled out of the case (the zone where the spiral rod starts to be pulled into the case), the lead is made larger than the starting end zone and the spiral rod is pulled out of the case with a smaller force than the starting end zone. When pulling the spiral rod pulled out of the case into a case with a simple configuration of changing the lead, a weak pulling force can be given to the shoji at the first stage, and a strong pulling force can be given at the last stage. Is also easy.

  The retractor body is provided with a slider connected to the spiral rod and movable in the opening / closing direction of the shoji along a guide provided in the body, and the clutch cam is pivotally attached to the slider so as to fall over and the clutch cam. If a cam shaft that slides along the guide is provided so as to hold the cam in an upright state, and the cam shaft is inserted into the guide to form a return prevention groove that locks the clutch cam in the overturned state, the retracting device body The structure of this is simple and can be obtained economically. Furthermore, when the brake device for braking the movement of the shoji is provided in the retracting device main body and a rack that can be engaged with the pinion gear of the brake device is provided on the slider, the shoji of the shoji suddenly moves while the rack is engaged with the pinion gear. Can be braked. And, if the leading end section of the spiral rod with a small lead is provided over the section where the disengagement of the rack and the pinion gear and the shoji moves toward the saddle frame, a large pulling force is applied to the shoji. The shoji can be attached to the frame.

An example of the relationship between the frame and the shoji is shown, (A) is a state in which the shoji is closing the opening, (B) is a state in which the shoji is moved and the opening is slightly opened, and (C) is an opening. Each explanatory drawing of the state which opened the part. The disassembled perspective view of a part of drawing-in apparatus main body. The top view which excluded some cases etc. of the drawing-in apparatus main body. Front view with the case of the retractor body omitted Sectional drawing of a drawing-in apparatus main body. A partially omitted cross-sectional view of a spiral rod mechanism. Explanatory drawing of a spiral rod. Explanatory drawing of the state which has a shoji in a closed position. Explanatory drawing of the state which started opening the shoji from the state shown in FIG. Explanatory drawing of the state which moved the shoji to the open position further from the state shown in FIG. Explanatory drawing of the state which the clutch cam fell and the engagement with a dog was disengaged. Explanatory drawing of the state which moved the shoji from the state shown in FIG. 11 further toward the open position, and the state which moved the shoji from the open position toward the closed position. Explanatory drawing of the state which the clutch cam contact | abutted to the dog. Explanatory drawing of the state which the clutch cam has engaged with the dog and the brake device is working. Explanatory drawing of the state which the braking by a braking device remove | deviates and the shoji is moving to the eaves frame side. The disassembled perspective view of a part of the retractor main body that does not include the braking device. Explanatory drawing of the state which has a shoji in a closed position with the apparatus shown in FIG. Explanatory drawing of the state which began to open the shoji from the state shown in FIG. Explanatory drawing of the state which moved the shoji further toward the open position from the state shown in FIG. Explanatory drawing of the state which the clutch cam fell and the engagement with a dog was disengaged. Explanatory drawing of the state which moved the shoji from the state shown in FIG. 20 further toward the open position, and the state which moved the shoji from the open position toward the closed position. Explanatory drawing of the state which the clutch cam contact | abutted to the dog. Explanatory drawing of the state which the clutch cam engaged with the dog. Explanatory drawing of the state in which the shoji is in contact with the heel frame.

  The retracting device of the present invention can be used for sliding door sashes (such as various sliding doors and sliding sashes) in which the shoji slides in and out of the opening of the frame. FIG. 1 shows an embodiment of a sliding door sash to which the present invention is applied. In the figure, the frame 1 has an opening 5 formed by an upper frame 2, a saddle frame 3, and a lower frame 4, and the opening 5 is formed in the opening. A shoji 6 is provided so as to be slidable. Then, a dog 7 provided with a tip projecting downward on the lower surface of the upper frame of the frame 1 and a retractor main body 8 provided on the upper arm of the shoji 6 constitute a retractor. The dog 7 may be provided on the shoji 6 side, and the retracting device main body 8 may be provided on the frame 1 side. In addition, the Example shown below demonstrates the case where the shoji 6 is drawn in to the side of the eaves frame 3 with a drawing device, when the shoji 6 contacts the eaves frame 3 of the frame 1 and closes the opening part 5. However, the present invention can also be applied so that the shoji 6 is pulled into the opposite side frame not shown when the opening 5 is opened.

  Referring to FIGS. 2 to 5, the retracting device main body 8 forms a storage space having a substantially cross-sectional rectangular shape whose upper surface is partially opened by a horizontally long case 9 extending along the opening / closing direction of the shoji 6 and a lid 10. In addition, a guide 11 having a sliding surface formed thereon is provided therein, and a slider 12 is provided so as to slide in the opening / closing direction of the shoji using the case 9, the lid 10 and the guide 11 as a guide. The slider 12 is formed in a substantially horizontally long rectangular parallelepiped shape, and is provided with a connecting portion 14 having an insertion groove 13 on one end side. A part of the side surface of the slider is opened to form a clutch cam storage portion 15 and a rack plate storage portion 16, and has a fixed shaft 17 that is supported by penetrating from one side to the other side. A notch groove 18 is provided which extends in an arc shape and has an open bottom surface. A mounting hole 20 for fixing the rack plate 19 is provided on the side surface on the rack plate storage portion side.

  The clutch cam 21 housed in the clutch cam housing portion 15 has a pair of claw pieces 23 that stand up against each other so as to form a substantially U-shaped flange portion 22, and is attached to the fixed shaft 17 of the slider 15. A mounting hole 24 for mounting in a rotatable manner is formed, and a cam shaft 25 that enters the notch groove 18 of the slider 12 is provided. With this configuration, the clutch cam 21 can turn around the fixed shaft 17 and can be overturned, and the cam shaft 25 that has come out of the notch groove 18 of the slider can slide on the guide 11.

  The rack plate 19 is formed in a substantially flat plate shape, and a fastening hole 26 into which the fixed shaft 17 of the slider 12 is inserted, and a fastening screw 27 for inserting the fastening screw 27 into the mounting hole 20 of the slider 12. A rack gear 29 is formed on the lower surface. The length of the rack plate 19 is such that when the shoji 6 moves to the saddle frame 3 side, it engages with the pinion gear 31 of the braking device 30 in the middle of the movement, and the shoji 6 does not move even if the pinion gear 31 and the rack gear 29 are disengaged. Furthermore, the length is such that it can move to the side of the eaves frame.

  The guide 11 is formed in a substantially horizontally long cube shape, and has a slider sliding surface 32 on which the lower surface of the slider 12 slides and a rack plate sliding surface 33 on which the side surface of the rack plate 19 slides. Near one end side of the moving surface 32, an arc-shaped return preventing groove 34 into which the cam shaft 25 of the clutch cam 21 that has slid on the slider sliding surface enters is opened. Further, on the side surface of the return prevention groove 34, a clutch cam relief surface 35 is formed so that the clutch cam 21 can fall over and escape when the cam shaft 25 enters the return prevention groove 34, and the braking device 30 is accommodated. A mounting surface 36 is formed for fixing.

  As the braking device 30, a known braking device such as a known rotary damper that can brake the rotation of the braking shaft 37 by using fluid pressure such as hydraulic pressure or pneumatic pressure can be preferably used. When the rack gear 29 of the rack plate 19 meshes with the pinion gear 31 provided on the brake shaft 37, the movement of the slider 12 to which the rack plate 19 is fixed is braked so that the shoji does not move suddenly. The meshing of the pinion gear 31 and the rack gear 29 functions in the middle of the movement of the shoji 6 toward the closed position, and the pinion gear 31 and the rack gear 29 mesh when moving toward the open position. Even when the pinion gear 31 rotates, the braking mechanism is prevented from functioning by a one-way clutch (not shown). Further, when the shoji 6 is closed as described above, the meshing between the rack gear 29 and the pinion gear 31 is released before the shoji 6 comes into contact with the saddle frame 3, and when the shoji 6 is close to the saddle frame 3, the braking device The installation position of the braking device and the length of the rack plate are determined so as not to function.

  A fixing plate 38 is provided on one end side of the case 9 and the guide 11, and an energy storage device 39 is attached to the fixing plate 38. The energy storage device 39 is connected to the slider 12 in which the clutch cam 21 is mounted so as to be able to fall down, and the shoji 6 is moved away from the frame frame 3 of the frame body with the clutch cam 21 engaged with the dog 7. Accumulate energy when moving. The energy accumulated at the position where the clutch cam 21 falls over and the dog 7 is disengaged during the movement of the shoji is held. When the shoji 6 moves in a direction approaching the frame 3 of the frame and the clutch cam 21 engages with the dog 7, the stored energy is consumed and the shoji 6 is pulled in the direction of the frame 3 of the frame. Can do. The energy storage device according to the present invention has a weak pull-in force when the shoji 6 starts to be pulled, and the shoji 6 moves so as to generate a pull-in force larger than the initial pull-in force when the shoji 6 is close to the saddle frame 3. It is comprised so that a drawing force can be changed in the middle of.

  In the present invention, the energy storage device 39 is constituted by a spiral rod mechanism 40. As shown in FIG. 6, the spiral rod mechanism includes a cylindrical case 41, a cylindrical rotation guide 42 that is provided rotatably on the distal end side of the case 41, and a slit in the rotation guide 42. A spiral rod 44 having a threaded portion 43 penetrating in a combined state and provided so as to be able to be pulled out from the case 41, and fitted to the outer periphery of the spiral rod 44, one end connected to the base end of the case 41, and the other end A torsion spring 45 connected to the rotation guide 42 is provided.

  A case 41 of the spiral rod mechanism is fixed to the fixing plate 38 provided on one end side of the retracting device main body 8, and a tip pin 46 provided on the spiral rod 44 is inserted into the insertion groove 13 of the connecting portion 14 of the slider 12. The spiral rod 44 is connected to the slider 12 by engaging. With this configuration, the spiral rod 44 does not rotate, but moves linearly with the slider 12 in the opening / closing direction of the shoji, and is pulled out of the case 41 or pulled into the case 41. Therefore, when the clutch cam 21 is engaged with the dog 7, the slider 12 is stopped at that position. Therefore, when the shoji 6 is moved, the case 41 moves together with the shoji 6. In other words, the slider 12 moves relative to the case 41 as the shoji 6 moves, and the spiral rod 44 is pulled out of the case 41 or drawn into the case. In the embodiment shown in the figure, when the spiral rod is pulled out from the case, the rotation guide 42 that is screw-engaged with the spiral rod 44 is rotated to wind the torsion spring 45. When the torsion spring 45 thus wound is rewound, the rotation guide 42 is rotated in the reverse direction by the torsion spring 45, so that the spiral rod 44 screw-engaged with the rotation guide 42 linearly moves in the axial direction. And then pulled into the case.

  In the present invention, as shown in FIG. 7, the threaded portion 43 of the spiral rod 44 is formed so that the lead of the starting end zone 47 of the threaded portion is small, that is, the side from which the pulling out from the case begins (the side where the pulling into the case ends). In addition, the lead is changed in the middle so that the lead of the end section band 48 on the drawing end side (the start side of drawing into the case) becomes larger than the lead of the thread portion of the start end section band 47. With this configuration, the lead applied to the spiral rod 44 is increased by the rotation of the rotation guide 42 because the lead is small on the drawing start (drawing end) side. On the other hand, since the lead is large on the spiral rod drawing end (drawing start) side, the torque applied to the spiral rod 44 by the rotation of the rotation guide becomes small. Therefore, in the first stage where the spiral guide 44 pulled out from the case 41 is pulled into the case by rotating the rotation guide 42 by the action of the torsion spring 45, the lead is large. The force to pull in is small, and the shoji is pulled with a weak force. At the final stage of drawing the spiral rod 44 into the case 41, since the lead is small, the force to move the spiral rod 44 straightly into the case and to pull it into the case becomes larger than the first stage, and the shoji 6 can be drawn with a large force. .

  The operation of the retractor of the present invention having the above configuration will be described with reference to FIGS. FIG. 8 shows a state in which the shoji 6 is closed. In this state, the shoji 6 is in contact with the collar frame 3. The clutch cam 21 of the retracting device main body 8 stands up, engages with the dog 7, and the spiral rod 44 is retracted into the case 41. At this time, if the winding amount of the torsion spring 45 provided in the case 41 is preliminarily wound to some extent, that is, if it is excessively wound, the shoji can be pressed against the frame, and this excessive winding By changing the degree, the force for pressing the shoji 6 against the saddle frame 3 by the action of the torsion spring 45 can be adjusted.

  When the shoji 6 is moved from the state of FIG. 8 toward the open position, as shown in FIGS. 9 and 10, the shoji 6 moves to the left in the figure, and therefore the slider 12 is engaged with the dog 7 and is stationary. The clutch cam 21 moves to the right with respect to the shoji 6, the spiral rod 44 linearly moves and is gradually pulled out from the case 41, and the torsion spring 45 in the case 41 passes through the rotation guide 42. Get involved gradually. As shown in FIG. 10, the rack gear 29 of the rack plate 19 meshes with the pinion gear 31 of the braking device 30 during the movement of the slider 12. At this time, the rotation of the pinion gear 31 is performed by a one-way clutch not shown. Since it is not transmitted to the braking part, the braking force does not act on the movement of the shoji.

  If the cam shaft 25 of the clutch cam 21 corresponds to the return prevention groove 34 formed on the sliding surface 32 of the guide 11 during the movement, the cam shaft 25 enters the return prevention groove 34 and the clutch cam 41 is fixed to the fixed shaft 17. Rotate around the center and fall. As a result, the dog 7 is disengaged from the flange portion 22 of the clutch cam 21, and the engaged state is released (FIG. 11).

  When the cam shaft 25 of the clutch cam 21 enters the return prevention groove 34 in this way, the right line of the slider 12 and the clutch cam 21 stops, the spiral rod 44 is pulled out from the case 21 to the maximum length, and the torsion spring 45 is sufficiently It is held in a state of being caught. Thereafter, the shoji 6 can be left to the open position without being restrained by the dog 7, and the opening can be opened (FIG. 12).

  Next, a case where the shoji is closed from the open position will be described. From the state shown in FIG. 12, the shoji 6 is moved to the right in the direction approaching the frame 3. At this time, the clutch cam 21 is in an overturned state, and the spiral rod 44 is held in a state of being pulled out from the case 41. When the shoji 6 moves right and the tip of the dog 7 comes into contact with the claw piece 23 of the clutch cam 21, the clutch cam 21 rotates in an upright state and the dog 7 engages with the flange portion 22 of the clutch cam 21. (FIG. 13). In this state, the clutch cam 21 and the slider 12 can move left relative to the shoji 6. In other words, since the clutch cam 21 is stationary (restrained) at the position of the dog 7 by engaging with the dog 7, the spiral rod 44 moves straight through the rotation guide 42 when the torsion spring 45 is rewound. Then, the shoji is moved right by the force of pulling the spiral rod into the case (FIG. 14). At this time, the spiral rod 44 is drawn into the case 41 from the fully drawn out state, but the lead of the threaded portion of the terminal zone 48 when the spiral rod 44 is pulled out from the drawing side, that is, the case 41, is the start end. Since it is formed in a lead larger than the zonal zone 47, the force to pull the spiral rod 44 is weak, and the shoji 6 moves slowly. When the rack gear 29 of the rack plate 19 meshes with the pinion gear 31 of the braking device 30, the rotation is transmitted to the braking portion of the braking device 30, the movement of the shoji 6 is braked, and the shoji can be prevented from moving suddenly.

  When the shoji 6 further moves to the right, the rack gear 29 of the rack plate 19 and the pinion gear 31 of the braking device 30 are disengaged, and the braking force is released. As shown in FIG. 15, the shoji 6 is moved to the side of the eaves frame 3 by the pulling force of the spiral rod 44. This part, that is, the pulling end side, in other words, the spiral rod 44 on the pulling start side from the case is moved. Since the lead of the screw portion is formed smaller than the lead at the end of drawing out the spiral rod from the case, the force for pulling the spiral rod 44 into the case 41 by the rotation of the rotation guide 42 is increased, and the shoji 6 is As shown in FIG. 8, the shoji 6 is brought into close contact with the eaves frame 3.

  Although the above embodiment is a case where a braking device is provided, the present invention may not be provided with a braking device. In this case, the guide only needs to have the slider sliding surface 32 and the return preventing groove 34, and the other configurations may be configured in substantially the same manner as in the above embodiment (see FIG. 16). FIGS. 17 to 24 substantially correspond to FIGS. 8 to 15 described above. Briefly, FIGS. 17 to 20 show a case where the shoji is moved from the closed position toward the open position. Then, the spiral rod 44 is pulled out of the case 41 and the torsion spring 45 is wound to accumulate energy.

  As shown in FIGS. 21 to 24, when the shoji is moved to the closed position, the torsion spring 45 is rewound from the stage where the clutch cam 21 is engaged with the dog 7, and the energy accumulated in the torsion spring is reduced. Consumed, the shoji 6 is drawn to the side of the eaves frame 3. At this time, by changing the lead of the threaded portion 43 of the spiral rod 44 in the middle, the force for pulling the shoji 6 is weakened in the first stage, and at the stage where it is in contact with the saddle frame 3, a large pulling force is given to It can be in close contact with the frame 3.

DESCRIPTION OF SYMBOLS 1 Frame 3 竪 Frame 6 Shoji 7 Dog 8 Pull-in device main body 11 Guide 12 Slider 19 Rack plate 21 Clutch cam 22 Hook 25 Cam shaft 29 Rack gear 30 Braking device 31 Pinion gear 34 Return prevention groove 39 Energy storage device 40 Spiral rod mechanism 41 Case 42 Rotating guide 43 Threaded portion 44 Spiral rod 45 Torsion spring 47 Starting end zone 48 End zone

Claims (9)

  A retractor main body and a dog are provided, and one member of the retractor main body and the dog is provided in a frame or a shoji that opens and closes within the opening surrounded by the frame, and the other member is the above-described shoji or frame. A clutch cam that can be engaged with the dog, movable in the opening / closing direction of the shoji, and can be turned over, and the shoji is engaged with the dog so that the shoji The energy storage device that accumulates energy up to a position where the clutch cam falls and disengages from the dog by moving away from the clutch cam. In the retracting device that draws the shoji in the frame frame direction by consuming the accumulated energy when the dog engages with the dog, the energy accumulating device pulls in the shoji. A weak pull-force in the bud stage, shoji is retracted, characterized in that changing the way in pulling force of the movement of the sliding door so as to produce a greater pulling force than the initial pulling force at the stage close to the vertical frame device.   2. The retracting device according to claim 1, wherein the retracting device main body includes a slider that is movable in an opening / closing direction of the shoji and that incorporates the clutch cam so as to be able to fall down.   The energy storage device is a spiral rod mechanism in which a spiral guide having a threaded portion is rotated to rotate a rotating guide and a torsion spring is wound or a rotating guide is rotated by unwinding the torsion spring to move the spiral rod linearly. In the stage where the spiral rod is connected to the clutch cam and the sliding rod starts to be pulled in by changing the lead of the screw portion of the spiral rod, the force to move the spiral rod straight is a weak force, and the shoji is close to the heel frame The retractor according to claim 1, wherein the sliding rod is retracted by linearly moving the spiral rod with a force larger than the initial stage of retracting.   4. The retracting device according to claim 3, wherein the torsion spring is further wound so as to press the shoji against the saddle frame when the shoji is in contact with the saddle frame.   The spiral rod mechanism includes a cylindrical case, a cylindrical rotation guide that is rotatably provided at the tip end side of the case, and a thread portion that penetrates the slit of the rotation guide in a screwed state. A spiral rod provided so as to be able to be pulled out from the case; and a torsion spring that is fitted on the outer periphery of the spiral rod and has one end connected to the base end of the case and the other end connected to the rotation guide. The shoji is pulled into the case in contact with the saddle frame, and is connected to the clutch cam so that the shoji is pulled out of the case when moving in a direction away from the saddle frame, and the lead of the screw portion of the spiral rod The lead of the start zone at the beginning of pulling out from the case is formed small, and the lead of the end zone at the end of withdrawal is larger than the lead of the start zone Retraction device according to claim 3 or 4, characterized in that it is.   The pull-in device main body has a guide provided in the main body for guiding the movement of the slider, and the clutch cam is pivotally attached to the slider so as to be able to fall over, and the guide is provided to hold the clutch cam in an upright state. A cam shaft that slides along the guide shaft, wherein the guide is formed with a return-preventing groove that engages the clutch cam in an overturned state by indenting the cam shaft, and the tip of the spiral rod is connected to the slider. The retracting device according to any one of 2 to 5.   The slider is provided with a rack gear so as to brake the movement of the shoji and a brake device having a pinion gear engaged with the rack gear is provided. The starting end section of the spiral rod is disengaged from the rack gear and the pinion gear so that the shoji The retracting device according to claim 6, wherein the retracting device is provided over a band that moves in a frame direction.   8. The retracting device according to claim 7, wherein the rack gear is formed on a rack plate provided on a slider, and the length of the rack plate is such that the engagement with the pinion gear is released before the shoji comes into contact with the collar frame. .   The sliding door sash provided with the drawing-in apparatus in any one of the said Claims 1-8.

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