JP2009228285A - Balancer device for double-hung window and double-hung window using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a balancer device for a double-hung window capable of mechanically stopping the noload unwinding of a coiled spring and the excessive winding of a coiled spring by properly adjusting the extended/retracted state of the coiled spring and also provide a double-hung window using the balancer device. <P>SOLUTION: In this balancer device, the coiled spring 13 is joined to a pivot shaft 12 at the inner end. The pivot shaft 12 extends or retracts the coiled spring 13 depending upon the rotating direction R12 of the shaft. A rotation stopping mechanism 14 stops the rotation of the pivot shaft 12 within the range in which the coiled spring 13 is further wound than in the maximum extended state of the coiled spring 13. The balancer device 1 for a double-hung window is combined with a lifting cable 15 and a sash 3 to form a double-hung window. The sash 3 is suspended from the lifting cable 15 of the balancer device 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a balancer device for raising and lowering windows and a raising and lowering window using the same.

  The raising / lowering window is configured to open and close by sliding up and down the indoor shoji or outdoor shoji arranged in the height direction of the window frame. Usually, the raising and lowering window is provided with a balancer device for supporting the shoji. The balancer device has a lifting mechanism for maintaining a mechanical equilibrium relationship with the weight of the shoji. With this lifting mechanism, the shoji can be easily raised and lowered with a slight force and stopped at any open position. Yes.

  As the lifting mechanism described above, for example, a mechanism using a spiral spring is known. A balancer device using a spiral spring has a spring case, a suspension rope winding car, a suspension rope, a support shaft, a ratchet wheel, and a click.

  The spring case contains a spiral spring inside the case. The suspension rope winding wheel has a truncated cone shape, has a winding surface in a portion corresponding to the conical surface, and further has a spiral winding groove in the surface of the winding surface. . The suspension rope winding wheel has a base lower surface coupled to the outer peripheral surface or upper surface of the spring case so as to transmit a rotational force.

  The spring case and the suspension rope take-up wheel are held so as to be rotatable about the support shaft. The support shaft passes through the spring case and the suspension rope winder and is fixed to the housing.

  The spiral spring has an inner end coupled to the support shaft inside the case, and an outer end pulled out from the case and coupled to the outer peripheral surface of the case. And a spring pressure is adjusted by rotating a spindle and expanding and contracting a spiral spring. The spring pressure of the spiral spring is transmitted to the suspension rope winding vehicle via the spring case, and is used as a suspension rope winding force that balances the weight of the shoji.

  The suspension cable is wound around the winding groove of the suspension cable take-up vehicle so that it can be fed out. One end of the suspension cord is coupled to the shoji, and the other end has a retaining portion. The retaining portion is guided to the inside of the suspension rope winder from near the bottom surface of the suspension rope winder, which is the beginning of winding of the suspension rope, and is latched on the suspension rope winder.

  The ratchet wheel is integrally coupled to the support shaft. The click is biased toward the ratchet wheel, and the rotation of the support shaft is prevented by engaging the ratchet wheel.

  By the way, in this type of balancer device, a tensile force must always be applied to the suspension cable wound around the winding groove toward the bottom surface of the winding groove. That is, since the suspension rope has elasticity, if the pulling force is lost, the suspension rope jumps out of the take-up groove and is wound on the support shaft. Therefore, the suspension rope is provided with an entrainment prevention piece in the middle part, and a state in which a tensile force is always applied by applying the hoisting hoisting force with the entrainment prevention piece hooked on a part of the housing. To be kept.

  Furthermore, in this type of raising and lowering window, the weight of the shoji varies depending on the size and material, so in order to achieve a mechanical balance between the suspension rope hoisting force of the balancer device and the weight of the shoji, It is necessary to adjust the expansion / contraction state of the spiral spring in accordance with the weight of the shoji for installation, and to adjust the lifting force of the suspended rope. This operation is called “adjustment winding”.

  The adjustment winding work described above is performed in a state where the balancer device is attached to the window frame and one end of the suspension rope is coupled to the shoji, but if the spiral spring is adjusted in the direction in which the spiral spring is loosened at the position where the shoji is closed, the suspension rope hoisting force is It tends to be lost too much. As a result, when the shoji is raised after the construction, the suspension rope is not wound around the winding wheel, causing slack, and the slack portion jumps out of the winding groove, causing malfunction.

  As described above, if adjustment winding work is performed in the position where the shoji is closed, `` empty unwinding '' is likely to occur because the lifting force of the hoisting rope is lost too much, and in the proper construction procedure, a spiral spring is wound at the position where the shoji is opened. It is supposed that adjustment winding is performed in the tightening direction. However, since it is easier to perform the adjustment winding with the shoji closed, the site workers often do this while knowing that it is an improper construction procedure, and this is one of the reasons why the balancer device does not work. It has become.

  On the other hand, as an appropriate construction procedure, when adjusting winding is performed at a position where the shoji is opened, it is necessary to leave a spring winding allowance of the spiral spring assuming a position where the shoji is closed in advance. If the spiral spring is tightened without leaving a winding margin, the shoji cannot be lowered. As described above, when the adjustment winding work is performed according to an appropriate construction procedure, the construction efficiency is deteriorated because the worker is required to have a high degree of skill because “excessive winding” must be avoided.

  As a conventional technique for solving the above-described problem, for example, one described in Patent Document 1 is known. The balancer device described in Patent Document 1 has a rotating plate, and an indicator for counting the number of rotations of the support shaft is displayed on the rotating plate. Therefore, adjustment winding work can be performed using this indicator as a guide. .

However, the rotating plate of Patent Document 1 does not prevent the rotation of the support shaft at all. Therefore, it is impossible to mechanically prevent the spiral spring from being unwound and excessively wound up.
Japanese Patent No. 3697405

  The subject of this invention is providing the balancer apparatus for raising / lowering windows which can adjust the expansion / contraction state of a spiral spring appropriately, and can stop a shoji in arbitrary open positions, and the raising / lowering window using these.

  Another object of the present invention is to provide a lifting / lowering window balancer device that mechanically prevents an unwinding of a spiral spring and prevents a suspension rope from coming off, and a lifting / lowering window using these. It is.

  Still another object of the present invention is to provide an up-and-down window balancer device that mechanically prevents excessive winding of the spiral spring and avoids the problem that the shoji cannot be lowered, and an up-and-down window using the same. It is to be.

  In order to achieve the above-described problems, a lifting / lowering window balancer device according to the present invention includes a spiral spring, a support shaft, and a rotation prevention mechanism. The spiral spring has an inner end coupled to the support shaft. The support shaft expands and contracts the spiral spring according to the axial rotation direction. The rotation prevention mechanism prevents the rotation of the support shaft within a range where the winding spring is tightened from the maximum expanded state that the spiral spring can take.

  In addition, the raising / lowering window balancer device according to the present invention includes a suspended rope winding vehicle and a suspended rope as basic constituents to be included in this type of spiral spring type balancer device. The suspension rope take-up wheel is held by a spindle so as to be rotatable. The suspension rope is wound around a suspension rope winding vehicle.

  The lift / lower window balancer device according to the present invention is combined with a shoji to constitute a lift / lower window. The shoji is suspended by a suspension line provided in the balancer device.

  As described above, the balancer device constituting the raising and lowering window according to the present invention has the spiral spring and the support shaft, and the spiral spring has the inner end coupled to the support shaft. The support shaft adjusts the spring pressure of the spiral spring by expanding and contracting the spiral spring according to the axial rotation direction. The adjusted spring pressure is transmitted to the suspension rope winding vehicle via the spring case, and is used as a suspension rope winding force via the suspension rope wound around the suspension rope winding vehicle. Therefore, by adjusting the spring pressure of the spiral spring, the lifting force of the suspension rope can be balanced with the weight of the shoji, and the shoji can be easily raised and lowered with a slight force and stopped at any open position.

  The balancer device according to the present invention is characterized in that it further has a rotation prevention mechanism on the premise of the basic configuration described above. The rotation blocking mechanism blocks the rotation of the support shaft within a range in which the spiral spring is tightened more than the maximum expanded state that the spiral spring can take. According to this structure, the unwinding of the spiral spring is mechanically prevented, and the suspension rope is prevented from being loosened. Accordingly, it is possible to avoid problems such as the suspension rope jumping out of the suspension rope winding vehicle. In the case of a general structure in which the spiral spring is housed inside the case, the maximum expanded state that the spiral spring can take is substantially determined by the internal volume of the case.

  More preferably, the rotation prevention mechanism has a lower limit that is more tight than the maximum expanded state that the spiral spring can take, a lower limit that is less than the minimum contracted state that the spiral spring can take, and a range from the lower limit to the upper limit. The shaft of the spindle is prevented from rotating inside. According to this structure, it is possible to prevent the spiral spring from being unwound at the lower limit, and to prevent excessive winding of the spiral spring at the upper limit, thereby avoiding the problem that the shoji cannot be lowered. The minimum contraction state that the spiral spring can take is a state in which the spiral spring is wound around the support shaft and the diameter dimension is not further reduced.

  Other objects, configurations and advantages of the present invention will be described in more detail with reference to the accompanying drawings. The accompanying drawings are merely examples.

As described above, according to the present invention, the following effects can be obtained.
(1) It is possible to provide an up / down window balancer device capable of appropriately adjusting the expansion / contraction state of the spiral spring and stopping the shoji at an arbitrary open position, and an up / down window using these.
(2) It is possible to provide an up / down window balancer device that can mechanically prevent the spiral spring from being unwound and prevent the suspension rope from coming off, and an up / down window using these.
(3) It is possible to provide an up-and-down window balancer device that mechanically prevents excessive winding of the spiral spring and avoids a problem that the shoji cannot be lowered, and an up-and-down window using these.

  1 is a front view of a balancer device for raising and lowering windows according to an embodiment of the present invention, FIG. 2 is a bottom view of the balancer device shown in FIG. 1, and FIG. 3 is a left side view of the balancer device shown in FIG. . 4 is a cross-sectional view taken along line 4-4 of FIG.

  The balancer device according to one embodiment of the present invention is a sliding window with a shoji that slides in the direction of the height to be found. And it is used to stop at any open position.

  1 to 4, the balancer device according to one embodiment of the present invention is an embodiment on the premise that the balancer device is attached to the left edge position of the upper edge of the window frame, and is attached to the right corner position. In the embodiment, the arrangement of the components is symmetrical. Hereinafter, it demonstrates concretely along drawing.

  The balancer device of FIGS. 1 to 4 includes a housing 10, a suspension rope winding wheel 11, a support shaft 12, a spring case 13, and a suspension rope 14.

  The housing 10 is formed by assembling and forming a metal plate material into a rectangular tube shape. The housing 10 is provided between the first base plate 101 facing the expected width direction W and the second base plate 102. And a storage space for the spring case 13.

  The suspension rope winding wheel 11 has a truncated cone shape, and has a winding surface 110 at a portion corresponding to a conical surface between the upper surface of the table and the lower surface of the table. The winding surface 110 has a winding groove 111 in the surface. The winding groove 111 is open on the surface of the winding surface 110 and is spirally turned along the axial direction of the rotation axis a <b> 12 or the expected width direction W. The winding groove 111 in FIG. 2 is a six-step (six winding) spiral along the expected width direction W.

  The support shaft 12 penetrates substantially the center of the plate surface of the first and second base plates 101 and 102 in the expected width direction W orthogonal to the plate surface, and both end portions thereof are the first and second ends, respectively. The base plates 101 and 102 are rotatably fixed to the shaft.

  The spring case 13 houses a spiral spring 130 inside the case. On the outer peripheral surface or upper surface of the spring case 13, the lower surface of the suspension rope winding wheel 11 is coupled so as to be able to transmit the rotational force.

  The support shaft 12 passes through the suspended rope winding wheel 11 and the spring case 13. The suspended rope winding wheel 11 and the spring case 13 are rotatably held by the support shaft 12 with the support shaft 12 as a rotation axis a <b> 12 while being housed in the housing 10.

  The spiral spring 130 has an inner end coupled to the support shaft 12, and an outer end pulled out from the inside of the case to the outside and coupled to the outer peripheral surface of the spring case 13 (see FIG. 4).

  The support shaft 12 rotates in the forward direction (for example, clockwise rotation) or in the reverse direction (for example, counterclockwise rotation), thereby expanding and contracting the spiral spring 130 according to the axial rotation direction and adjusting the spring pressure. The spring pressure of the spiral spring 130 is transmitted to the suspension rope winding vehicle 11 via the spring case 13 and used as the suspension rope winding force F that balances the weight of the shoji.

  The suspension cable 14 is accommodated in the winding groove 111 so as to be wound or fed out. The suspension cord 14 has one end coupled to a shoji and the other end having a retaining portion 141. The retaining portion 141 is guided from the vicinity of the bottom surface of the suspension rope winding vehicle 11 at the beginning of winding to the inside of the suspension rope winding vehicle 11 through the slit, and is held by the suspension rope winding vehicle 11.

  Furthermore, the suspension rope 14 has a wrap-in preventing piece 142 at an arbitrary position in the length dimension. In the suspension cable 14, the length from the retaining portion 141 to the blocking piece 142 is the suspension cable winding amount of the suspension cable winding wheel 11, and specifically, is set to follow the entire length of the winding groove 111. can do.

  In the balancer device of FIGS. 1 to 4, the housing 10 has a suspension rope hooking portion 103 in the vicinity of the suspension rope feeding portion in order to latch the blocking piece 142.

  One end side of the suspension rope hooking portion 103 is integrally coupled to the first base plate 101, and both edges orthogonal to the coupling edge are cut out by two slits. The suspension rope hooking portion 103 is bent at the coupling edge so that the other end is close to the winding surface 110, and the space between the plate surface of the suspension rope hooking portion 103 and the winding surface 110 is The diameter of the blocking piece 142 is narrower. According to this structure, the blocking piece 142 can be hooked to the hanging rope hooking portion 103 while the hanging rope 14 is wound around the hanging rope winding vehicle 11.

  The balancer device of FIGS. 1 to 4 includes a ratchet wheel 15 and a click 16 as a well-known ratchet mechanism. The ratchet wheel 15 is integrally coupled to the support shaft 12 on the first base plate 101. The click 16 is biased toward the ratchet wheel 15, and the blade of the click 16 engages with the teeth of the ratchet wheel 15, thereby limiting the axial rotation direction of the support shaft 12 to one side.

  The balancer device shown in FIGS. 1 to 4 is characterized in that it has a rotation blocking mechanism 17 in addition to the basic configuration of the single balancer device described above. The rotation prevention mechanism 17 prevents the rotation of the support shaft 12 within a range in which the spiral spring 130 is wound more tightly than a maximum expansion state that the spiral spring 130 can take.

  In the embodiment in which the spiral spring 130 is housed inside the spring case 13, the maximum expanded state that the spiral spring 130 can take is the internal volume of the spring case 13, in particular, the internal area of the spring case 13 that limits the expansion of the spiral spring 130. It depends on. A state in which the outermost side of the spiral spring 130 is in contact with the inner surface of the spring case 13 and cannot be further expanded is a maximum expanded state that the spiral spring 130 can take.

  Further, the rotation prevention mechanism 17 prevents the rotation of the support shaft 12 within a range in which the spiral spring 130 becomes looser than the minimum contracted state that can be taken. The minimum contraction state that the spiral spring 130 can take is the minimum contraction state that the spiral spring 130 can take when the spiral spring 130 is wound around the support shaft 12 and the diameter does not decrease any further.

  That is, the rotation prevention mechanism 17 provides an upper limit and a lower limit of the shaft rotation of the support shaft 12 based on the expansion / contraction state of the spiral spring 130. The lower limit of the shaft rotation of the support shaft 12 is “a state tightened more than the maximum expanded state that the spiral spring 130 can take”, and within this range, the support shaft 12 12 shaft rotation is prevented.

  The rotation prevention mechanism 17 will be specifically described with reference to FIGS. 1 to 4. The rotation prevention mechanism 17 includes a first rotation body 171 and a second rotation body 173.

  The first rotating body 171 is disposed on the first base plate 101. The first rotating body 171 has a ring shape, is fixed to the support shaft 12 by an external fit, and rotates integrally with the support shaft 12. The 1st rotary body 171 has the convex part 172 in the periphery. The convex portion 172 protrudes in the radial direction of the support shaft 12 and rotates around the support shaft 12 with a predetermined radius according to the rotation of the support shaft 12.

  On the other hand, the second rotating body 173 has a disk-like gear shape, and a plurality of concave portions 174 are equally arranged along the circumference. The second rotating body 173 is held on the first base plate 101 adjacent to the first rotating body 171 by the shaft body 175 so as to be rotatable in the forward direction or the reverse direction.

  The second rotating body 173 is rotated by one tooth (tooth pitch) every time the convex portion 172 meshes with the concave portion 174 once. That is, the concave portion 174 meshes with the convex portion 172 once every rotation of the first rotating body 171, and the second rotating body 173 is rotated in the first rotation according to the contact position with the convex portion 172. The body 171 is moved in the direction opposite to the axis rotation direction.

  In FIG. 1 to FIG. 4, since the second rotating body 173 has twelve recesses 174, when the support shaft 12 rotates twelve times, the projection 172 meshes with the recess 174 twelve times. , It will rotate 360 degrees. Note that the rate of stepping of the second rotating body 173 can be adjusted as appropriate depending on the number of protrusions 172 and the number of recesses 174.

  The second rotating body 173 is rotatably supported in a state where a certain amount of friction is applied by combining the shaft body 175 with an elastic body such as a leaf spring so that the second rotating body 173 does not rotate freely due to vibration or the like. Is preferred.

  Further, the rotation prevention mechanism 17 includes a first rotation prevention piece 176 and a second rotation prevention piece 177 as mechanisms for preventing the first and second rotating bodies 171 and 173 from stepping. .

  The first rotation prevention piece 176 is a stop pin, for example, and is erected at a predetermined radial position on one surface of the second rotator 173, and the shaft rotates according to the shaft rotation of the second rotator 173. While keeping a predetermined radial position from the body 175, it moves while drawing a circular trajectory.

  The second rotation preventing piece 177 extends on one surface of the second rotating body 173 in the direction of the shaft body 175, and the tip projects into the movement locus of the first rotation preventing piece 176.

  The second rotation preventing piece 177 is screwed to a position higher than the thickness of the second rotating body 173 on one surface of the first base plate 101. The second rotation prevention piece 177 of FIGS. 1 to 4 is placed on the mount unit 104.

  The mount portion 104 is provided on the first base plate 101, is disposed at a corner corresponding to the hanging rope feeding portion in the vicinity of the second rotating body 173, and is higher than one surface of the first base plate 101. Are formed with a height difference.

  The second rotation prevention piece 177 is screwed to the mount portion 104. Here, a gap corresponding to the height of the mount 104 is secured between the other surface of the second rotation prevention piece 177 and one surface of the first base plate 101 facing the second rotation prevention piece 177. A second rotating body 173 is disposed on the front side.

  The second rotation preventing piece 177 prevents the rotation of the second rotating body 173 on a surface of the second rotating body 173 within a range smaller than 360 degrees. Specifically, the tip of the second rotation prevention piece 177 shown in FIG. 1 has a triangular shape, and depending on the position of the first rotation prevention piece 176, one of the tip surfaces and the other of the tip surfaces are Contact each other.

  The second rotation prevention piece 177 comes into contact with the first rotation prevention piece 176 at the rotation start point (P1) of the second rotating body 173, so that the support shaft 12 is further loosened in the direction in which the spiral spring 130 is further loosened. Prevents rotation. On the other hand, at the end point (P2) of the rotation of the second rotating body 173, contact with the first rotation preventing piece 176 prevents the spindle 12 from rotating further in the direction in which the spiral spring 130 is further tightened. To do.

  Referring to FIGS. 3 and 4, the balancer device has a mounting portion 18. The mounting portion 18 is a side surface of the housing 10 facing the finding length direction L, and is combined with a support (not shown) that is fixed to the window frame in advance to attach the balancer device to the window frame (not shown). Used for. The mounting portion 18 shown in FIG. 4 has two hook holes 181 and 182, a bent portion 183, and a screw retaining hole 184 in a substantially L-shaped plate surface.

  The two hooking holes 181 and 182 penetrate from one surface to the other surface, and are arranged side by side with an interval in the expected width direction W on the upper side of the plate surface viewed in the finding height direction T. On the other hand, the screwing hole 184 penetrates from one surface to the other surface, and is arranged on the same line as the hooking hole 181 on the lower side of the plate surface as viewed in the finding height direction T.

  The two hooking holes 181 and 182 and the screwing hole 184 are separated from each other in the finding height direction T, and are preferably arranged such that a line connecting the centers thereof is a right triangle. According to this configuration, the mounting posture is stabilized.

  The bent portion 183 is disposed between the screw stop hole 184 and the hook hole 181. The bent portion 183 stabilizes the mounting posture by engaging the support tool 28 with an uneven shape.

  FIG. 5 is a front view showing a part of the balancer device shown in FIGS. 1 to 4 in a cutaway manner, and FIG. 6 is a front view showing a state after the state shown in FIG. 5 and 6, the same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals.

  In this type of balancer device, a tensile force must always be applied to the suspension cable 14 wound in the winding groove 111. Since the suspension rope 14 is usually a structure in which a plurality of metal wires are wound together and has elasticity, when the tensile force against the suspension rope 14 is lost, the suspension rope 14 jumps out of the winding groove 111 and is supported. This is because malfunctions such as being caught in the shaft 12 are caused.

  In this regard, FIGS. 5 and 6 show a “tension adjustment winding operation” for initially setting the spring pressure of the spiral spring 130 in order to apply a tensile force to the suspension rope 14 wound in the winding groove 111. . This will be specifically described below.

  First, referring to FIG. 5, in a state where the second rotation prevention piece (177) is not attached to the mount portion 104 and the second rotating body 173 can freely rotate, By rotating the winding groove 111 in the spiral direction, the suspension rope 14 is wound around the winding groove 111.

  The length of the suspension line 14 from the retaining portion 141 to the blocking piece 142 is set so as to follow the entire length of the winding groove 111, so that the suspension line 14 is being wound around the winding groove 111. When the blocking piece 142 collides with the suspension rope hooking portion 103, the winding of the suspension rope 14 to the winding groove 111 is completed.

  Next, referring to FIG. 6, the blocking piece 142 is hooked on the hanging rope hooking portion 103 in a state where the winding of the hanging rope 14 is completed. In this state, a force in the direction opposite to the rotation direction of the support shaft 12 is applied to the suspension rope winding wheel 11. By further rotating the support shaft 12 in the direction in which the spiral spring 130 is tightened from this state, a spring pressure is generated in the spiral spring 130, and this spring pressure pulls the suspension rope 14 toward the bottom surface of the winding groove 111. Acts as

  Specifically, when the support shaft 12 is rotated by one or two of the teeth of the ratchet wheel 15 from the state where the blocking piece 142 is in contact with the suspension rope hooking portion 103, the expansion / contraction state of the spiral spring 130 is the spiral spring. It will be in the state tightened rather than the maximum expansion state which 130 can take. At this time, the spring pressure generated in the spiral spring 130 is transmitted to the suspension cable 14, so that the suspension cable 14 fits into the winding groove 111 of the suspension cable winding wheel 11 and no slack is generated.

  Further, the second rotation preventing piece 177 is screwed onto the mount portion 104 in the state described above, and the rotation of the second rotating body 173 is prevented by the contact of the first and second rotation preventing pieces 176 and 177. . Since the rotation of the second rotating body 173 is blocked, the rotation of the first rotating body 171 is blocked and further the rotation of the spindle 12 is also blocked. Prevents from rotating.

  When the second rotating body 173 is in the state shown in FIG. 6, the first rotating body 171 is engaged with the first rotating body 171 so that the first rotation preventing piece 176 comes to a predetermined position (starting point of shaft rotation). Adjust the position in advance.

  Note that the number of windings of the spiral spring 130 in the tension adjustment winding operation is determined based on a value obtained by subtracting the number of windings of the winding groove 111 from the maximum number of windings of the spiral spring 130 in the minimum contracted state. For example, when the maximum number of windings of the spiral spring 130 is 15, the winding groove 111 of the suspension rope winding wheel 11 shown in FIGS. 1 to 6 has six stages (six windings). The number of windings can be within 9 times.

  The advantages of the rotation prevention mechanism described with reference to FIGS. 1 to 6 will be further described with reference to FIGS. FIG. 7 is a front view of a lifting / lowering window balancer device according to another embodiment of the present invention. 8 to 11 are simplified front views showing how the balancer device shown in FIG. 7 is used. 7 to 11, the same components as those shown in FIGS. 1 to 6 are denoted by the same reference numerals.

  First, the balancer device of FIG. 7 is characterized in that it has all the basic configurations of the balancer device described with reference to FIGS. 1 to 6 and further has an index 19.

  The index 19 displays the number of rotations of the support shaft 12 and the number of windings of the spiral spring 130 by numbers, letters, or symbols, and is provided on the surface of the first base plate 101 from the shaft body 175. While maintaining a predetermined radial position, it is printed or stamped on a circumference.

  On the other hand, the second rotating body 173 has a through hole 170. The through-hole 170 is an exposure window that allows the predetermined index 19 to be seen, and is opened from the shaft body 175 to a predetermined radial position. According to this structure, according to the rotational position of the second rotating body 173, the through hole 170 moves so as to overlap the predetermined index 19, so that the adjuster can adjust the suspension shaft hoisting force F to adjust the support shaft 12. There is no need to work while counting the number of rotations of the head. Therefore, it is possible to avoid problems such as the suspension rope hoisting force F not reaching an appropriate value due to miscounting, and the construction efficiency is improved.

  In this type of raising / lowering window, the weight of the shoji varies depending on the size and material. Therefore, in order to achieve a mechanical balance between the lifting force F of the balancer device and the weight of the shoji, it must be installed at the construction site. It is necessary to adjust the expansion / contraction state of the spiral spring 130 in accordance with the weight of the shoji. This operation is called “adjustment winding”. Hereinafter, the adjustment winding operation when the balancer device of FIG. 7 is used will be described with reference to FIGS.

  First, in the embodiment in which the spiral spring 130 is housed in the spring case 13, the state in which the outermost side of the spiral spring 130 abuts against the inner surface of the spring case 13 and cannot be further expanded is the state of the spiral spring 130. It is the maximum expansion state to get. Hereinafter, for convenience of explanation, the spring case 13 indicated by the alternate long and short dash line is described as the maximum expanded state (13) that the spiral spring 130 can take as it is.

  In the state shown in FIG. 8, the spiral spring 130 is in a state 130 a that is tightened more than the maximum expanded state (13) that can be taken, for example, by the winding operation described with reference to FIGS. 5 and 6.

  Since the second rotation prevention piece 177 has one of its front end surfaces in contact with the first rotation prevention piece 176 to prevent the second rotation body 173 from rotating to the right, the support shaft 12 is swirled. Rotation (left rotation) in the direction of loosening the spring 130 is prevented.

  The second rotation prevention piece 177 sets the starting point P1 of the rotation of the second rotating body 173, and sets the starting point P1 as the lower limit of the axial rotation of the support shaft 12, so that the spiral spring 130 is tightened 130a. To prevent it from loosening. In the through hole 170, the second rotating body 173 overlaps “S” as the index 19 at the starting point P <b> 1.

  The state shown in FIG. 9 is a state after the state shown in FIG. 8, and by rotating the support shaft 12 in the tightening direction of the spiral spring 130, the convex portion 172 rotating together with the support shaft 12 is formed. The second rotator 173 is engaged with the recess 174, and the second rotator 173 is advanced in the direction opposite to the axial rotation direction of the first rotator 171.

  The state shown in FIG. 10 is a state after the state shown in FIG. 9, and the second rotating body 173 has one tooth (tooth pitch) every time the convex portion 172 and the concave portion 174 mesh with each other. Only rotated. That is, the concave portion 174 meshes with the convex portion 172 once every rotation of the first rotating body 171, and the second rotating body 173 is rotated in the first rotation according to the contact position with the convex portion 172. The body 171 is moved in the direction opposite to the axis rotation direction. In FIG. 10, the through hole 170 moves with the shaft rotation of the second rotating body 173 and overlaps “1” as the index 19 corresponding to the rotation speed of the support shaft 12.

  The state shown in FIG. 11 is a state after the state shown in FIG. 10, and the index 19 displayed to the outside through the through-hole 170 is “11” when the convex portion 172 and the concave portion 174 mesh 11 times. , The rotation operation of the support shaft 12 is stopped.

  In a state where the index 19 indicates “11”, the spiral spring 130 is in a state of being looser than the minimum contracted state 130 b that can be taken. The second rotation prevention piece 177 prevents the second rotation body 173 from rotating counterclockwise by the other end surface of the second rotation prevention piece 176 coming into contact with the first rotation prevention piece 176. Rotation (right rotation) in the direction of tightening the spring 130 is prevented. In other words, the second rotation preventing piece 177 sets the end point P2 of the rotation of the second rotating body 173, and sets the end point P2 as the upper limit of the shaft rotation of the support shaft 12, whereby the spiral spring 130 is The minimum contraction state 130b is prevented.

  As described with reference to FIGS. 8 to 11, in the adjustment winding operation of the balancer device, the spiral spring 130 is tightened by starting points P <b> 1 to P <b> 1 at which the first rotation prevention piece 176 hits the second rotation prevention piece 177. The rotation of the second rotating body 173 is limited to a range of 360 degrees or less at the maximum.

  The rotation prevention mechanism 17 provides an upper limit and a lower limit for the shaft rotation of the support shaft 12 based on the expansion / contraction state of the spiral spring 130. The upper limit of the shaft rotation of the support shaft 12 is “the spiral spring 130 can take. The lower limit of the shaft rotation of the support shaft 12 is “a state tightened more than the maximum expansion state that the spiral spring 130 can take”, and within this range, the support shaft 12 Prevent shaft rotation.

  Conventionally, the adjustment winding operation described with reference to FIGS. 8 to 11 is performed in a state where the balancer device is attached to the window frame and one end of the suspension rope 14 is coupled to the shoji, but the spiral spring is in a position where the shoji is closed. When 130 is adjusted in the loosening direction, the suspension rope hoisting force F tends to be lost excessively. As a result, when the shoji is raised after construction, the suspension rope 14 is not taken up by the take-up wheel 11 and is slackened. This slack comes out of the take-up groove 111 and is caught in the support shaft 12 and becomes inoperable. This causes problems.

  Normally, if the adjustment winding work is performed in the position where the shoji is closed, it is easy to cause “empty rewinding” in which the lifting force F is loosened excessively. Therefore, in an appropriate construction procedure, the spiral spring is used at the position where the shoji is opened. It is supposed that the adjustment winding operation is performed in the direction of tightening 130. However, since the adjustment winding work can be performed easily when the shoji is closed, field workers often do this while knowing that it is an inappropriate construction procedure, and this is one of the reasons why the balancer device does not work. It has become.

  In the balancer device according to the present invention, the first rotation preventing piece 176 is supported by the second rotation preventing piece 177 at the starting point P1 of the shaft rotation of the second rotating body 173, and the spiral spring 130 is loosened. The spindle 12 cannot be rotated. Therefore, the spiral spring 130 after the second rotation prevention piece 177 is attached is not loosened from the tightened state 130a. In addition, in the winding state 130a, since the tensile force always acts on the suspension rope 14, the suspension rope 14 does not protrude from the winding groove 111 and come off.

  On the other hand, as an appropriate construction procedure, when the adjustment winding operation is performed at the position where the shoji is opened, it is necessary to leave a spring allowance for the spiral spring 130 assuming that the shoji is closed in advance. If the spiral spring 130 is excessively tightened without leaving a spring allowance, a problem that the shoji cannot be lowered occurs. As described above, since the skill of the worker is required to perform the adjustment winding work in an appropriate construction procedure, there arises a problem that the work cannot be performed efficiently.

  In the balancer device according to the present invention, the rotation preventing mechanism 17 causes the "rotation state of the spiral spring 130 to be less than the minimum contracted state 130b that the spiral spring 130 can take" at the end point P2 of the shaft rotation of the second rotating body 173. Since the upper limit of the shaft rotation is set, even if the spiral spring 130 is tightened up to the upper limit of the index 19, there remains a margin for the spiral spring 130 to be tightened when the shoji is lowered. Therefore, the lowering of the shoji does not stop halfway.

  By removing the second rotation prevention piece 177, the second rotating body 173 becomes rotatable. For example, when readjustment is necessary, by removing the second rotation prevention piece 177, The adjustment work shown in FIGS. 8 to 11 can be performed again.

  The balancer device described with reference to FIGS. 1 to 11 is combined with a window frame or the like to constitute a raising / lowering window. Next, the raising / lowering window using the balancer apparatus according to the present invention will be described. FIG. 12 is a front view showing a part of the raising / lowering window according to an embodiment of the present invention with a part omitted, and FIG. 13 is an enlarged view showing a method of assembling the balancer device by breaking a part of the raising / lowering window shown in FIG. It is a front view. 12 and 13, the same reference numerals are given to the same components as those shown in FIGS. 1 to 11.

  Referring to FIG. 12, the raising / lowering window includes a balancer device 1, a window frame 2, an indoor shoji 3, and an outdoor shoji 4.

  The balancer device 1 is fixed in the vicinity of both corners of the upper frame 22 of the window frame 2, and the suspension rope 14 fed out from the suspension rope winding vehicle 11 is coupled to the coupling portion 30 that protrudes from the side portion of the indoor side shoji 3. Has been. The indoor shoji 3 is slidable along the vertical frame 21 in the height direction T. In the balancer device 1, the upper surface of the suspension rope winding vehicle 11 is oriented indoors so that the dropping point of the suspension rope 14 is on the vertical frame 21 side.

  The balancer device 1 is attached to a corner of the vertical frame 21 facing the window frame width direction. Referring to FIG. 13 regarding the mounting operation of the balancer device 1 with respect to the window frame 2, the balancer device 1 is combined with the support tool 28 fixed to the window frame 2 in advance, and the mounting portion 18 and the support tool 28 are combined. , Attached to the window frame 2.

  The attachment portion 18 and the support tool 28 have a structure that can be coupled to each other. Although not necessarily clear from the drawing, in the support tool 28, the two hooking protrusions 281 and 282 are arranged side by side with an interval in the expected width direction above the finding height direction T. The screw hole 284 penetrates from one surface to the other surface, and is arranged on the same line as the hooking protrusion 281 on the lower side in the finding height direction T.

  The bent portion 283 is disposed between the screw retaining hole 284 and the hooking projection 281. The bent portion 283 stabilizes the mounting posture by engaging the bent portion 183 of the mounting portion 18 with an unevenness.

  The mounting portion 18 is in a state in which the hooking protrusions 281 and 282 are hooked in the hooking holes 181 and 182 by a so-called tip hooking method, and the screwing hole 184 of the support tool 28 and the screwing hole 284 of the mounting portion 18 are positioned. Then, fix them together through screws.

  The balancer device 1 suspends the indoor shoji 3 while maintaining a mechanical equilibrium with the shoji weight of the indoor shoji 3 due to the hoisting force of the suspension rope winder 11. Specifically, the balancer device 1 winds or unwinds the suspension rope 14 around the suspension rope take-up wheel 11 in conjunction with the raising and lowering of the indoor side shoji 3.

  12 and 13 can have all of the advantages of the balancer device 1 described with reference to FIGS. For example, in the balancer device 1, the suspended rope take-up wheel 11 and the spring case 13 are held so as to be rotatable about the support shaft 12. Then, the spring pressure is adjusted by rotating the spindle 12 to expand and contract the spiral spring 130. The spring pressure of the spiral spring 130 is transmitted to the suspension rope take-up wheel 11 via the spring case 13 and used as the suspension rope hoisting force F that balances the weight of the shoji 3. Accordingly, by adjusting the spring pressure of the spiral spring 130, the suspension rope hoisting force F can be balanced with the weight of the shoji, the shoji 3 can be easily raised and lowered with a slight force, and can be stopped at any open position.

  Further, the rotation prevention mechanism 17 can provide an upper limit and a lower limit for the shaft rotation of the support shaft 12 based on the expansion / contraction state of the spiral spring 130. That is, the support shaft 12 cannot rotate in the direction of loosening the spiral spring 130 at the starting point P1 of the shaft rotation of the second rotating body 173. Therefore, since the spiral spring 130 after the second rotation prevention piece 177 is attached does not loosen from the tightened state 130a, the problem of “empty rewinding” being performed in the attaching operation of the balancer device can be avoided. it can.

  Similarly, the rotation preventing mechanism 17 sets the “state that is more relaxed than the minimum contraction state 130 b that the spiral spring 130 can take” at the end point P 2 of the shaft rotation of the second rotating body 173 as the upper limit of the shaft rotation of the support shaft 12. Therefore, even if the spiral spring 130 is tightened up to the upper limit of the index 19, there remains a margin for the spiral spring 130 to be tightened when the shoji 3 is lowered. Therefore, it is possible to avoid the problem of “overwinding” in the work of attaching the balancer device.

  14 to 16 are front views of a lift / lower window balancer device according to still another embodiment of the present invention. 14 to 16, the same components as those shown in FIGS. 1 to 13 are denoted by the same reference numerals.

  The embodiment of the balancer device shown in FIGS. 14 to 16 is characterized in that a device is added to the structure of the rotation prevention mechanism 17. Hereinafter, the description will focus on the characteristic part. It is obvious that this structure can have all the advantages described with reference to FIGS.

  In the balancer device of FIG. 14, the second rotating body 173 has a structure in which a part of the circumference is curved in a concave shape, and a predetermined index 19 is exposed at the notched portion.

  In the balancer device of FIG. 15, the rotation prevention mechanism 17 includes two rotation prevention pieces 176a and 176b. The two rotation prevention pieces 176a and 176b are a plurality of first rotation prevention pieces 176 that are provided upright at intervals. Specifically, the two rotation prevention pieces 176a and 176b are erected at positions orthogonal to the shaft body (175), and the second rotation prevention pieces 177 are arranged in accordance with the rotation direction of the support shaft 12. Each of them collides, and the rotation of the second rotating body 173 is prevented within a range of 270 degrees.

  According to this structure, all the advantages described with reference to FIGS. 1 to 13 can be obtained, and the two rotation prevention pieces 176a and 176b can rotate the second rotating body 173 in a range smaller than 360 degrees. Therefore, the expansion / contraction state of the spiral spring 130 can be set finely.

  Furthermore, since the first rotation prevention piece 176 provides an upper limit and a lower limit for the shaft rotation of the support shaft 12, two rotation prevention pieces 176a and 176b may be provided corresponding to the upper limit and the lower limit. It is obvious that it can be done. In addition, by providing the one rotation prevention piece 176 shown with a dashed-dotted line in FIG. 15, the same effect as the case where the two rotation prevention pieces 176a and 176b are provided can be acquired.

  In the balancer device of FIG. 16, the second rotating body 173 has a semicircular shape, has a plurality of concave portions 174 along the periphery of the arc portion, and is adjacent to the first rotating body 171. On the base plate 101, the shaft is rotatably supported.

  Further, the second rotating body 173 has a first rotation prevention recess 178 and a second rotation prevention recess 179 at the front end edge and the rear end edge as viewed in the rotation direction, respectively. Yes.

  The rotation prevention piece 176 is mounted on the first base plate 101 in the rotation area of the second rotating body 173, and the first and second rotation prevention recesses 178 according to the rotation direction of the support shaft 12. 179, respectively, and the rotation of the second rotating body 173 is prevented within a range of 180 degrees.

  The rotation prevention piece 176 abuts on the first rotation prevention recess 178 at the rotation start point of the second rotating body 173, and prevents the support shaft 12 from rotating in the direction in which the spiral spring 130 contracts. At the end of rotation of the second rotating body 173, the second rotating body 173 comes into contact with the second rotation-preventing recess 179 and prevents the support shaft 12 from rotating in the direction in which the spiral spring 130 expands.

  Obviously, the structure of the balancer device of FIG. 16 can have all of the advantages described with reference to FIGS.

  Although the contents of the present invention have been specifically described above with reference to the preferred embodiments, it is obvious that those skilled in the art can take various modifications based on the basic technical idea and teachings of the present invention. It is.

It is a front view of the balancer apparatus for raising / lowering windows which concerns on one Embodiment of this invention. It is a bottom view of the balancer apparatus shown in FIG. It is a left view of the balancer apparatus shown in FIG. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is a front view which fractures | ruptures and shows a part of balancer apparatus shown in FIG. 1 thru | or FIG. FIG. 6 is a front view showing a state after the state shown in FIG. 5. It is a front view of the balancer apparatus for raising / lowering windows which concerns on another embodiment of this invention. It is a front view which simplifies and shows the usage condition of the balancer apparatus shown in FIG. It is a front view which shows the state after the state shown in FIG. FIG. 10 is a front view showing a state after the state shown in FIG. 9. It is a front view which shows the state after the state shown in FIG. It is a front view which omits and shows a part about raising / lowering window which concerns on one Embodiment of this invention. FIG. 9 is an enlarged front view showing a method of assembling the balancer device by breaking a part of the raising / lowering window shown in FIG. 8. It is a front view of the balancer apparatus for raising / lowering windows which concerns on another embodiment of this invention. It is a front view of the balancer apparatus for raising / lowering windows which concerns on another embodiment of this invention. It is a front view of the balancer apparatus for raising / lowering windows which concerns on another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Balancer apparatus for raising / lowering windows 12 Support shaft 130 Spiral spring 130a The state tightened rather than the maximum expansion state 130b The minimum contraction state 14 Suspension rope 17 Rotation prevention mechanism 3 Indoor side shoji

Claims (3)

A lifting / lowering window balancer device including a spiral spring, a support shaft, and a rotation prevention mechanism,
The spiral spring has an inner end coupled to the support shaft,
The support shaft expands and contracts the spiral spring according to the axial rotation direction,
The rotation prevention mechanism prevents the rotation of the support shaft within a range in which the spiral spring is tightened more than the maximum expanded state that the spiral spring can take.
Balancer device for raising and lowering windows. A balancer device for raising and lowering windows according to claim 1,
The rotation prevention mechanism has a lower limit as a lower limit than a maximum expansion state that the spiral spring can take, an upper limit as a state loosened from a minimum contraction state that the spiral spring can take, and the lower limit to the upper limit. Preventing the shaft from rotating within a range,
Balancer device for raising and lowering windows. A lifting / lowering window having a lifting / lowering window balancer device and a shoji,
The lifting / lowering window balancer device includes a spiral spring, a support shaft, a rotation prevention mechanism, and a suspension cable,
The spiral spring has an inner end coupled to the support shaft,
The support shaft expands and contracts the spiral spring according to the axial rotation direction,
The rotation prevention mechanism prevents shaft rotation of the support shaft,
The shoji is suspended by a suspension line provided in the balancer device.
Raising and lowering windows.

Images