JP2022059162A - Lifting window balancing device - Google Patents

Abstract

To allow a window to be lightly operated upon closure thereof and upon opening thereof from the closed state in a lifting balancing device that uses a spiral rod and torsion spring that are threadedly engaged with a coupling to generate a balancing load that balances with the weight of the window.SOLUTION: In a spiral balancer in which a spiral rod 7 and a torsion spring 13, which is entrained when the window 1 is lowered, are installed in the pipe 3 to produce a balancing load to be balanced with the weight of the window, the torsion spring is given an initial spring pressure equivalent to the weight of the window. The lower end of the spiral rod 7 is connected to a rotatable rotary shaft 22 provided on a slide block 17. The rotary shaft is urged in the opposite direction of the direction of rotation of the spiral rod 7 by a buffer spring 35 with a spring pressure greater than the above initial spring pressure to allow rotation of the rotary shaft 22 when a large repulsive force by the torsion spring is applied to the spiral rod 7.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sash window balancing device that allows the sash window to be opened and closed lightly and can stand still at an arbitrary position.

Since the sash window has a structure that opens and closes by pushing up and down a heavy window (shoji), the opening and closing operation becomes heavy, and if it is stopped at an arbitrary position, it will descend by its own weight. There is. There is known a balancing device that creates a balancing load corresponding to the weight of the window when opening and closing the window so as not to cause such a situation. As this type of balancing device, a spiral balancer that combines a torsion spring and a spiral rod (screw plate) is widely used.

In the spiral balancer type balancing device, for example, as shown in Patent Document 1, a torsion spring (spiral spring) is housed in a pipe fixed to a window frame, and the upper end of the torsion spring is fixed to the upper part of the pipe. The lower end is fixed to a coupling (nut member) rotatably provided at the bottom of the pipe, and the spiral rod (screw plate) inserted in the pipe is screw-engaged with the coupling and the lower end protrudes downward from the pipe. .. The tip of the spiral rod is non-rotatably connected to a slide block (connecting metal fitting) that slides in the vertical groove provided in the window frame, and a window (shoji) is attached to the connecting member provided in this slide block. The lower end of the spiral rod is non-rotatably connected to the window. It is also possible to connect the pipe to the window side and connect the spiral rod to the window frame side. Then, when the window is lowered, the spiral rod moves in the axial direction together with the window, so that the coupling rotates, and the torsion spring is wound by the coupling. The frictional engagement between the torsion spring and the spiral rod increases due to the winding tightening, and the repulsive force of the torsional spring due to this winding tightens the spiral rod and the coupling more strongly, and this frictional engagement force is due to the repulsive force of the torsion spring. It is configured so that the window can be stopped at any position by overcoming the weight of the window and balancing it with the weight of the window.

The torsion spring is wound to give an initial spring pressure corresponding to the weight of the window so that the window does not descend when the window is in the upper position, but it is further entangled when closing the window. , The repulsive force of the torsion spring acts on the spiral rod as the window descends. When the window descends, the amount of entanglement of the torsion spring gradually increases and the repulsive force increases. However, the repulsive force when the window reaches the lowest descent position is still very large, so it cannot be closed unless the window is pushed down strongly. Normally, the lower end of the spiral rod is non-rotatably connected to the window via a slide block that slides in the window frame, so that the repulsive force acting on the spiral rod makes the slide block the window frame. It is transmitted as a rotational force that rotates in the pressing direction. When the window is pushed up, this rotational force acts as a large sliding resistance between the slide block and the window frame, which makes the operation heavy.

If the lower end of the spiral rod is rotatably connected to the slide block, the rotational force is not transmitted, but then the spiral rod rotates freely due to the repulsive force of the torsion spring, and the frictional engagement force increases. The action and effect of the spiral balancer that tries to keep the window in an arbitrary position in balance with the weight of the window cannot be expected. A spiral balancer in which the lower end of the spiral rod is connected to the slide block via a rotatable rotating body is also known (see, for example, Patent Document 2). However, as described above, if the lower end of the spiral rod rotates under normal use conditions, it cannot function as a spiral balancer. Therefore, as described in Patent Document 2, the rotating shaft should not rotate via the one-way clutch. Is fitted to the slide block. Then, when adjusting the torsional force, a tool such as a driver is used to rotate the rotating body so that the spiral rod can be rotated in the direction in which the torsion spring is wound. As described above, even if a configuration is conventionally known in which the lower end of the spiral rod is connected to the slide block via a rotatable member, the spiral rod rotates when a large rotational force acts on the spiral rod due to the repulsive force of the torsion spring. It is not a thing, and there is no function to reduce the opening and closing operation of the window.

Jikken Sho 59-14622 (column 2, line 16 to column 3, line 12, Fig. 4) Japanese Unexamined Patent Publication No. 2008-57653 (paragraphs 0035 to 0037, FIG. 11)

The present invention is a spiral balancer that moves a spiral rod (screw plate) in the axial direction to wind a torsion spring (spiral spring), and exerts a pulling force on the spiral rod by the repulsive force of the torsion spring to balance the weight of the window. In the type of raising and lowering window balancing device, the pushing force when lowering the window to the lower position is lightened, and when opening and closing the window, the repulsive force of the torsion spring acts on the window frame via the spiral rod. It is to provide a raising and lowering window balancing device that reduces resistance and allows the window to be raised lightly.

According to the present invention, a pipe extending along a window frame, a spiral rod housed in the pipe, a spiral rod having a threaded portion formed along the longitudinal direction, and a lower end protruding from the lower portion of the pipe, and a rotation near the lower end of the pipe. A coupling spring that is provided so that the spiral rod is screw-engaged and inserted, and a torsion spring whose lower end is fixed to the coupling and whose upper end is fixed to the upper end of the cylinder and to which an initial spring pressure corresponding to the weight of the window is applied. A slide block slidably provided along the window frame and connected to the window and a rotation shaft rotatably provided on the slide block are provided, and the lower end of the spiral rod is connected to the rotation shaft and the torsion spring is provided. When a large repulsive force is applied to the rotating shaft via the spiral rod, the rotating shaft is rotated in the direction opposite to the rotating direction of the spiral rod by a buffer spring having a spring pressure larger than the initial spring pressure so as to allow the rotating shaft to rotate. A balancer for raising and lowering windows, which is characterized by being urged to the spring, is provided, and the above-mentioned problems are solved.

According to the present invention, the buffer spring is composed of a coil spring, one end of the coil spring is supported by a rotating shaft, the other end is supported by a slide block, and the rotating shaft is provided with a protrusion protruding in the outer peripheral direction. The slide block is provided with a sash window balancing device provided with a stopper with which the protrusion abuts when the window is in the raised position.

The balancing device of the present invention is configured as described above, and when the window is pushed down, the torsion spring is caught by the movement of the spiral rod, and the repulsive force acting from the torsion spring to the spiral rod acts between the coupling and the spiral rod. The frictional engagement force increases and the window can be stopped at any position. When the spiral rod approaches the maximum push-down position and the rotational force acting on the spiral rod increases, the spiral rod rotates against the rotation axis urged in the direction opposite to the direction in which the spiral rod rotates due to the repulsive force of the torsion spring. The rotation acting on the slide block is relaxed and the window can be pushed down lightly. Then, when raising the window, the slide block is elastically in sliding contact with the window frame by the cushioning spring, and it becomes possible to rotate slightly within the range in which the rotation axis rotates, so that the force for raising the window is reduced. Will be done.

Further, since the rotation shaft is provided with a protrusion protruding in the outer peripheral direction and the slide block is provided with a stopper, the rotation range of the rotation shaft is restricted, the rotation shaft does not rotate unnecessarily, and the spiral rod and the coupling A frictional engagement force corresponding to the initial spring pressure is secured between them, and there is no risk of the window descending.

An embodiment of the present invention is shown, where (A) is a partially omitted sectional view of a lower portion of the pipe, and (B) is a sectional view of an upper portion of the pipe. An exploded perspective view of the slide block. Perspective view of the slide block. An explanatory diagram of a state in which the rotating shaft rotates.

FIG. 1 shows an embodiment of the present invention, and various known spiral balancers can be used as the spiral balancer. In FIG. 1, as an example, the spiral described in JP-A-2019-27083 can be used. Examples are shown in which the present invention is applied to a balance device. More specifically, it has a pipe 3 housed in a window frame 2 of a sash window (shoji) 1, and the upper end and the lower end of the pipe 3 are opened, and a mounting screw (not shown) is provided in a mounting hole 4 provided near the upper end. Is inserted and fixed to the window frame 2. A coupling 5 is rotatably attached to the lower end side of the pipe 3, and a spiral rod 7 having a threaded portion 6 screw-engaged with the coupling 5 is inserted into the pipe 3. The spiral rod 7 has a length in which the upper end 8 extends close to the upper end of the pipe 3 in FIG. 1 in which the window 1 is in the raised position (open state), and the lower end 9 has a length protruding downward from the lower end of the pipe 3. Is. A mounting pin 10 for mounting on the window side is provided at the lower end 9 of the spiral rod protruding downward. An upper sleeve 11 fixed by a mounting screw is inserted into the upper part of the pipe 3, and the upper sleeve 11 has a small diameter portion formed in a lower portion thereof, and a lower portion formed above the small diameter portion and the coupling 5. Both ends of the torsion spring (torsion spring) 13 are fixed to the sleeve 12. Then, as is known, when the spiral rod 7 moves downward when the window 1 is closed, the torsion spring 13 is involved, and when the spiral rod 7 moves upward when the window 1 is opened, the entrainment is released. To. It can also be applied to a window device in which the pipe 3 is connected to the window side and the spiral rod 7 is connected to the window frame side.

A fixing member 14 is inserted and fixed in the large diameter portion of the upper sleeve 11, and an adjusting member 15 is rotatably inserted in the small diameter portion on the lower surface side of the fixing member 14. The adjusting member is urged toward the fixing member 14 by a spring that pulls it upward. On the inner surface of the adjusting member 15, an engaging projection 16 with which the upper end 8 of the spiral rod 7 can be engaged when the spiral rod 7 is in an upper position is provided so as to face each other, and the upper surface of the adjusting member 15 and a fixing member. Between the lower surfaces of the 14th, the fixing member 14 is allowed to rotate in the direction in which the torsion spring 13 is wound, but is prevented from rotating in the direction in which the torsion spring 13 is rewound. A ratchet and other one-way clutch mechanisms (not shown) are provided.

As described above, by combining the adjusting member 15 with the fixing member 14 via the one-way clutch, the spiral rod is used before the slide balancer is installed in the window 1 or when the spiral rod 7 is in the raised position. When the 7 is rotated, the coupling 5 rotates and the torsion spring 13 can be wound around. Therefore, before or after the installation in the window 1, the torsion spring can be easily set to the initial weight corresponding to the weight of the window (obstacle). Spring pressure can be applied.

A slide block 17 is slidably inserted in the window frame 2. The slide block has a rectangular parallelepiped shape in the embodiment shown in the figure, but can be formed into a plate shape or any other appropriate shape. The mounting pin 10 provided at the lower end 9 of the spiral rod 7 is detachably connected to the hook 18 provided on the slide block 17. A mounting pin may be provided on the slide block 17 side, a hook may be provided on the spiral rod 7 side, or the slide block 17 may be detachably connected by an appropriate mechanism. The slide block 17 is provided with a connecting member 19 for connecting to the window 1, and the connecting member 19 extends in the window direction through a vertical groove 20 provided in the window frame 2 and has a mounting bolt or the like in the mounting hole 21. Is inserted and fixed to the window.

The slide block 17 is provided with a rotary shaft 22 rotatably. As shown in FIG. 2, the rotating shaft 22 is formed above the main body shaft portion 24 inserted into the rotating hole 23 formed in the slide block 17, the pedestal portion 25 formed above, and the pedestal portion 25. The connecting portion 26 is provided, and the base portion of the hook 18 is inserted into the groove 27 provided in the connecting portion 26 and fixed by the fixing pin 28. The lower end of the main body shaft portion 24 inserted into the rotary hole 23 is prevented from coming off by a holding pin 30 via a washer 29. The pedestal portion 25 of the rotating shaft 22 is provided with a protrusion 33 protruding in the outer peripheral direction so as to protrude between the stoppers 31 and 32 provided in a facing state with the slide block 17, and a hook groove 34 extending in the vertical direction. There is.

Between the rotary shaft 22 and the slide block 17, when a large repulsive force due to the torsion spring 13 acts on the rotary shaft 22 via the spiral rod 7, the rotation of the rotary shaft 22 is allowed from the initial spring pressure. A cushioning spring 35 is provided that urges the rotating shaft 22 in the direction opposite to the rotating direction of the spiral rod 7 with a large spring pressure. The cushioning spring 35 can be made of an appropriate elastic body, but is preferably made of a coil spring, is inserted into the rotary hole 23 via a washer 36, and one end 37 thereof is a pedestal portion 25 of the rotary shaft 22. The other end 38 is locked to the hook groove 39 provided in the slide block 17.

According to the above configuration, when the window 1 is pushed down, the torsion spring 13 is caught by the movement of the spiral rod 7, and the frictional engagement force acting between the coupling 5 and the spiral rod 7 due to the repulsive force acting from the torsion spring 13 on the spiral rod 7. Can be increased to stop the window 1 at any position. When the rotational force acting on the spiral rod 7 becomes large as it approaches the maximum pushing position for closing the window, the repulsive force of the torsion spring 13 resists the rotating shaft 22 urged in the direction opposite to the direction in which the spiral rod 7 rotates. Then, the spiral rod 7 rotates, the rotational force acting on the slide block 17 is relaxed, and the window can be lightly closed. The slide block 17 is elastically slidable to the window frame 2 by the cushioning spring 35, and when the window 1 is raised, the slide block 17 can rotate slightly within the range in which the rotating shaft 22 has rotated. The force is reduced and the window can be raised lightly.

Since the cushioning spring 35 has a spring pressure larger than the initial spring pressure applied to the torsion spring, the protrusion 33 provided on the rotating shaft 22 is provided when the window is in the raised position, that is, when the spiral rod 7 is in the raised position. , Is in contact with one of the stoppers 31 formed on the slide block 17. Therefore, the rotation of the spiral rod 7 can be prevented, and the window 1 does not descend by its own weight. Further, even if the spiral rod 7 tries to rotate greatly against the buffer spring 35, the rotating shaft 22 hits the other stopper 32 to prevent the spiral rod 7 from rotating, so that the friction generated between the spiral rod 7 and the coupling 5 occurs. The engaging force is secured, and the balanced state with the weight of the window can be maintained.

1 Window 2 Window frame 3 Pipe 5 Coupling 7 Spiral rod 13 Torsion spring 17 Slide block 22 Rotating shaft 35 Cushion spring

Claims (3)

A pipe extending along the window frame, a spiral rod housed in the pipe and having a threaded portion formed along the longitudinal direction and having a lower end protruding from the lower portion of the pipe, and a spiral rod rotatably provided near the lower end of the pipe. A coupling in which the rod is screw-engaged and inserted, a torsion spring in which the lower end is fixed to the coupling and the upper end is fixed to the upper end of the cylinder and an initial spring pressure equivalent to the weight of the window is applied, and a sliding spring along the window frame. It is equipped with a slide block that is movably provided and connected to a window, and a rotation shaft that is rotatably provided on the slide block. The lower end of the spiral rod is connected to the rotation shaft, and a large repulsive force due to the torsion spring is spiral. When acting on the rotating shaft via the rod, the rotating shaft is urged in the direction opposite to the rotating direction of the spiral rod by a buffer spring having a spring pressure larger than the initial spring pressure so as to allow the rotating shaft to rotate. A featured balancer for raising and lowering windows. The balancing device for a sash window according to claim 1, wherein the cushioning spring is composed of a coil spring, one end of which is supported by a rotating shaft and the other end of which is supported by a slide block. The balancing device for a sash window according to claim 1, wherein a protrusion is provided on the rotating shaft, and a stopper is provided on the slide block so as to face the slide block.

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