JP2002021420A - Balancer for lifting-lowering window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a balancer for a lifting-lowering window, by which the adjusting works of spring pressure can be conducted easily without requiring skill. SOLUTION: The balancer 7 has casings 15, spiral shafts 16, nut members 18 screwed to the lower end sections of the spiral shafts 16, spring seats 19 installed at upper end sections in the casings 15 and torsion coil springs 17, in which one end sections are engaged with the nut members 18 and the other end sections with the spring seats 19 respectively. The balancer also has engaging holes 25 formed to frame members 14 fixed onto the spring seats 19 and control levers 27 supported to shafts 28 mounted on the frame members 14. The spiral shafts 16 have small lead angle sections 31, in which lead angles are formed in size smaller than lead angles on the other end side, on the lower end sides of the spiral shafts 16. The three engaging holes 25 are formed, and L/2 is set at the pitches of the engaging holes when the length of the small lead angles is represented by L.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift window balancer device installed on a lift window provided in a railway vehicle, for example, to reduce the force required to open and close the lift window. Regarding improvement.

[0002]

2. Description of the Related Art A railway vehicle is provided with, for example, an elevating window device as shown in FIG. 1 (excluding a vehicle running at a high speed). The elevating window device shown in FIG. 1 includes a window frame 1 having upper and lower horizontal frames 3 and 4 and left and right vertical frames 5 and 5 of an opening 2 formed on a wall surface (not shown) of a vehicle. 6 is provided so as to be able to move up and down freely. The window shoji 6 opens the opening 2 when ascending, and closes the opening 2 when descending. In such an elevating window device, a balancer is attached along the left and right vertical frames 5 and 5 of the window frame 1 so as to reduce the force required for elevating the window shoji 6.

[0003] A conventionally known balancer includes a main body and a hollow rectangular cylindrical frame member connected to an upper portion of the main body. The main body includes a cylindrical casing made of a metal pipe, a spiral shaft provided in the casing, and a nut member rotatably held at a lower end of the casing and screwed to a lower end of the spiral shaft. And a spring seat fixed to an upper end portion in the casing, and provided in a state of being loosely fitted to the spiral shaft, the lower end portion being engaged with the nut member, and the upper end portion being engaged with the spring seat, respectively. And a torsion coil spring. At the lower end of the spiral shaft, a locking piece that locks to a locking portion such as a locking metal fitting attached to the lower end of the window shoji 6 is attached.

On the other hand, the frame member is connected to the upper end of the casing by known means such as a screw member while being fitted thereto. On a pair of side surfaces of the frame member facing each other, an engagement hole is formed which can be engaged with an engagement protrusion provided on the window frame 1. Further, a pair of side surfaces of the frame member where the engagement holes are not provided are provided with slit-shaped openings that allow the operation lever described below to enter into the frame member and protrude outside the frame member. . The operation lever is provided for adjusting the spring pressure of the torsion coil spring, is rotatably supported on a shaft that is mounted on a side surface provided with the engagement hole, and is provided through the opening. Can protrude.
In the case of the above-described conventional structure, the operation lever is a window shoji 6
Project in a direction perpendicular to.

When the conventional balancer configured as described above is mounted on the elevating window device, a locking piece provided on the lower end of the spiral shaft is locked on a locking portion mounted on the lower end of the window shoji 6. I do. Further, the engagement holes formed in the frame member are engaged with the engagement protrusions formed in the window frame 1.
Prior to this mounting, or after the locking piece is locked to the locking portion, the operation lever is protruded, and the body connected to the frame member with the operation lever is rotated in an appropriate direction. The spring pressure of the torsion coil spring is adjusted to an appropriate value. After the adjustment, the operation lever is stored in the frame member. When the spring pressure needs to be adjusted after the balancer is attached to the elevating window device, the main body is moved via the operation lever in a state where the engagement hole and the engagement protrusion are disengaged. The rotation is performed.

[0006]

In the case where the weight of the window shoji 6 constituting the elevating window apparatus to which the above-described known balancer is attached is large, a plurality of the balancers are provided on the left and right sides of the window shoji 6, respectively. It is necessary to provide each. In such a case, since the balancer is disposed in a state of being overlapped in a direction perpendicular to the window shoji 6 (a state shown in FIG. 2), the operation of adjusting the spring pressure becomes troublesome. That is, since the operation lever protrudes in a direction perpendicular to the window shoji 6, when adjusting the spring pressure of each of the balancers arranged so as to overlap with each other, the respective balancers are once set. It is necessary to adjust it after removing it, and then attach it to the lifting window device. Moreover, the change in the spring pressure due to the rotation of the operation lever is not displayed or the like, but is left to the guess of the operator. For this reason, the operation of adjusting the spring pressure requires skill.

The elevating window balancer according to the present invention has been made in view of the above-described circumstances, and can easily adjust the spring pressure without any skill, and furthermore, according to the weight of the window shoji. It is an object of the present invention to provide a lift window balancer that can easily perform the fine adjustment of the spring pressure even when a plurality of balancers are attached.

[0008]

According to a first aspect of the present invention, there is provided a balancer for a lift window, comprising: a hollow cylindrical casing; a spiral shaft provided in the casing; A nut member rotatably held at one end and screwed to one end of the spiral shaft, a spring seat mounted at the other end in the casing, and provided in a state of being loosely fitted to the spiral shaft, One end of the torsion coil spring is engaged with the nut member, and the other end of the torsion coil spring is engaged with the spring seat. An engagement hole formed in a frame member fixed to the spring seat is provided on the frame member. An operating lever supported on a shaft, which can be immersed in the frame member and protruded out of the frame member, the engagement protrusion provided on a window frame constituting a window device formed on the wall surface. Engagement hole In the elevating window balancer that is used by locking one end of the spiral shaft to a locking portion formed on a window sash forming the window device, the spiral shaft has a lead angle on one end side. It has a small lead angle portion formed smaller than the lead angle on the other end side, and a plurality (N) of the engagement holes are formed at equal pitches in the length direction of the frame member. And the length of the spiral shaft is L / (N
-1).

According to a second aspect of the present invention, a shaft for supporting the operation lever is provided in a direction perpendicular to the window shoji, so that the operation lever protrudes parallel to the window shoji. It is intended to be. Further, as set forth in claim 3, an anti-vibration effect is enhanced by providing a collar made of an elastic material which presses the operation lever around a shaft supporting the operation lever, or according to claim 4. As described above, by covering the outer periphery of the torsion coil spring with the member having the vibration-proof performance, the vibration-proof effect can be enhanced.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings. 1 to 7
Shows a first embodiment of the present invention. The balancer 7 according to the present embodiment is installed in, for example, an elevating window device provided in a railway vehicle, like the conventional balancer. As shown in FIG. 1, the lifting window device provided on the railway vehicle is, as shown in FIG. 1, connected to the upper and lower horizontal frames 3, 4 of the opening 2 formed in the wall surface (not shown) of the vehicle. A window sash 6 is provided on the window frame 1 having the vertical frames 5 and 5 so as to be able to move up and down. The window shoji 6 opens the opening 2 when ascending,
It is configured to close the opening 2 when descending.

In order to reduce the force required for raising and lowering the window shoji 6, a balancer 7 is attached to such a vertical window device along the left and right vertical frames 5, 5 of the window frame 1. .

As shown in FIGS. 3 to 7, the balancer 7 includes a main body 13 and a hollow rectangular cylindrical frame member 14 connected to an upper portion of the main body 13. The main body 1
Reference numeral 3 denotes a cylindrical casing 15 made of a metal pipe, and a spiral shaft 16 provided in the casing 15.
A nut member 18 rotatably held at a lower end (one end) in the casing 15 and screwed to a lower end (one end) of the spiral shaft 16; and an upper end (other end) in the casing 15 Part 19) fixed to the spring seat 19
The lower end (one end) of the nut member 18 is provided so as to be loosely fitted to the spiral shaft 16.
And a torsion coil spring 17 whose upper end (the other end) is engaged with the spring seat 19, respectively. The lower end 16a of the spiral shaft 16 is provided with a through hole 35 that engages with a hook 36 that is a locking portion attached to the lower end of the window shoji 6.

In the case of this embodiment, the spiral shaft 16 has a small lead angle portion 31 at its lower end (one end).
And a larger lead angle portion 32 on the upper end side than this. The lead angle of the small lead angle portion 31 is smaller than the lead angle of the large lead angle portion 32. The three engagement holes 25 formed in the frame member 14 are formed at an equal pitch over the length direction of the frame member 14. The pitch is L1 / 2 when the length of the small lead angle portion 31 of the spiral shaft 16 is L1. The length of the large lead angle portion 32 of the spiral shaft 16 is L2.

On the other hand, the frame member 14 is connected to the upper end of the casing 15 by a known means such as a screw, as shown in FIGS. An engagement hole 25 is formed on a pair of side surfaces of the frame member 14 facing each other so as to be able to engage with an engagement protrusion 26 provided on the window frame 1. In the case of the present embodiment, the engagement protrusion 26 is formed by a screw.

Further, the engagement hole 25 of the frame member 14 is formed.
The operation lever 2 described below is provided on a pair of side surfaces not provided with
7 is provided with a slit-shaped opening (not shown) that can be immersed in the frame member 14 and protruded outside the frame member 14. Accordingly, a shaft 28 that supports the operation lever 27 is provided in a direction perpendicular to the window shoji 6. That is, in the present embodiment, unlike the above-described conventional structure, the operation lever 27 is made to protrude in parallel with the window shoji 6. The operation lever 27 is provided for adjusting the spring pressure of the torsion coil spring 17, and is rotatably supported by a shaft 28 which is mounted on a side surface provided with the engagement hole 25. Through the opening, it can protrude as shown by the two-dot chain line in FIGS. 5 and 7.

A shaft 28 for supporting the operation lever 27 is provided.
Around the collar 33 made of an elastic material such as a soft resin or a stuffing material.
By pressing the operation lever 27 by the collar 33, the shaft 28
The effect (vibration-proof effect) of preventing metal noise generated from the above is enhanced.

When the balancer 7 according to the present embodiment configured as described above is mounted on the elevating window device, the through hole 35 provided in the lower end 16a of the spiral shaft 16 is mounted on the lower end of the window shoji 6. The hook 36 is locked.
Further, the engagement hole 25 of the frame member 14 is engaged with an engagement protrusion 26 formed on the window frame 1. Prior to this attachment or after the through hole 35 is locked to the hook 36, the operation lever 27 is projected from the state shown by the solid line in FIGS. 5 and 7 to the state shown by the two-dot chain line in FIG. The main body 1 is connected to the frame member 14 by holding the operation lever 27.
3 is rotated in an appropriate direction, and the spring pressure of the torsion coil spring 17 is adjusted to an appropriate value. After the adjustment, the operation lever 27 is stored in the frame member 14. If it is desired to adjust the spring pressure after attaching the balancer 7 to the elevating window device, the operation lever 27 is disengaged from the engagement hole 25 and the engagement projection 26. This is performed by rotating the main body 13 via.

The basic operation of the lift window balancer 7 according to this embodiment configured as described above is the same as that of the above-described conventional structure. That is, when the window shoji 6 is raised,
The spiral shaft 16 relatively rotates the nut member 18, and the torsion spring pressure of the torsion coil spring 17 changes. This prevents free fall of the window sash 6 and reduces the force required to open and close the window sash 6. Further, the spiral shaft 16 has a large lead angle portion 32 with a large lead angle formed on the middle portion side and a small lead angle portion 31 with a small lead angle formed on one end portion side. When raising and lowering the window spring 6, the ratio of twisting the torsion coil spring 17 by the stroke of the window shoji 6 becomes small, and the force of the balancer 7 can be made substantially constant.

Further, in this embodiment, as shown in FIG. 2, three balancers 7 are mounted on the right and left sides of the elevating window device, respectively. Even in such a case, in the balancer 7 according to the present invention, adjustment of the spring pressure (set load) in each balancer 7 can be easily performed. That is, in the present embodiment, the shaft 28 supporting the operation lever 27 is provided in the direction perpendicular to the window shoji 6, so that the operation lever 27 is To project in parallel. For this reason, as shown in FIG. 2, even if the three balancers 7 are arranged so as to overlap with each other in the direction toward the indoor side of the window shoji 6, the operation levers 27 of the individual balancers 7 can be protruded. The spring pressure of the torsion coil spring 17 can be easily adjusted via the operation lever 27.

In the balancer 7 according to the present embodiment, three engagement holes 25 formed in the frame member 14 are formed at equal pitches in the length direction of the frame member 14.
At the same time, the pitch is set to L1 / 2 as described above. In such a configuration, a case will be described in which the force at the time of elevating and lowering is adjusted by a slight difference between the load of the balancer 7 after the balancer 7 is attached and the weight of the window sash 6. For example, when the window sash 6 is lowered with a light force and the window sash 6 is raised with a force, the load by the balancer 7 is smaller than the weight of the window sash 6. In this case, three engagement holes 25
Of which the lowermost engaging hole 25 is provided in the window frame 1.
6 is engaged. As a result, the entire balancer 7 has the lead L
Because the nut member 18 twists the torsion coil spring 17 by half a turn in a direction to increase the spring pressure, the set load increases. Conversely, window shoji 6
In the case where only a small force is required for raising the window sash and a force is required for lowering the window sash 6, the weight of the window sash 6 is smaller than the load imposed by the balancer 7. In this case, the uppermost engagement hole 25 of the three engagement holes 25 is engaged with the engagement protrusion 26 provided on the window frame 1. As a result, the balancer 7 as a whole lowers by half (L1 / 2) of the lead L1, and the nut member 18 twists the torsion coil spring 17 half-turn in a direction in which the spring pressure decreases, thereby reducing the set load. . Since such adjustment can be performed very easily, the adjustment does not take much time.

The adjustment of the torsion coil spring 17 by a half turn or more is performed by twisting the torsion coil spring 17 through the operation lever 27. At the same time, the engagement hole 25 to be engaged with the engagement protrusion 26 is appropriately selected. Thus, the spring pressure adjustment by the operation lever 27 and the engagement hole 2
By combining the selection of the engagement protrusion 26 with which the engagement 5 engages, the torsion coil spring 17 can be twisted in an appropriate direction at an arbitrary rotation speed.

Further, as in the second embodiment shown in FIGS. 6 and 7, the range from the mounting position of the spring seat 19 to the screwing position of the nut member 18 on the outer periphery of the torsion coil spring 17 is made of soft resin or garbage. By covering with a member 34 having a vibration-proof performance such as a material, it is also possible to prevent generation of unpleasant metal noise accompanying the vibration of the torsion coil spring 17 and the main body 13 with the vehicle.

[0023]

The lifting window balancer according to the present invention is constructed and operated as described above, so that the operation of adjusting the spring pressure can be easily performed without skill, and moreover, a plurality of spring pressure adjusting operations are performed according to the weight of the window shoji. Fine adjustment of the spring pressure can be easily performed even when the balancer is mounted.

[Brief description of the drawings]

FIG. 1 is a front view of an elevating window device provided in a vehicle, showing a first embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a schematic vertical sectional view showing an upper end portion of the balancer without an operation lever.

FIG. 4 is a vertical sectional side view showing an upper end portion of the balancer in a state in which an operation lever is stored.

FIG. 5 is a side view of the upper end of the balancer for explaining rotation of the operation lever.

FIG. 6 is a vertical sectional side view showing a use state of the balancer.

FIG. 7 is a vertical sectional side view as viewed from the left side of FIG. 6;

FIG. 8 is a view similar to FIG. 6, showing a second embodiment of the present invention.

9 is a longitudinal sectional side view of the same seen from the left side in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Window frame 9 Locking part 15 Casing 16 Spiral shaft 17 Torsion coil spring 18 Nut member 19 Spring seat 25 Engagement hole 26 Engagement projection 27 Operation lever 28 Shaft 31 Small lead corner 33 Color

Claims (4)

[Claims] A hollow cylindrical casing; a spiral shaft provided in the casing; a nut member rotatably held at one end of the casing and screwed to one end of the spiral shaft; A spring seat attached to the other end in the casing, and a torsion that is provided so as to be loosely fitted to the spiral shaft, one end of which is engaged with the nut member, and the other end of which is engaged with the spring seat. A coil spring, an engaging hole formed in a frame member fixed to the spring seat, and an operation lever supported by a shaft provided in the frame member and capable of immersing in the frame member and projecting out of the frame member. Wherein the engagement hole is engaged with an engagement projection provided on a window frame constituting a window device formed on a wall surface, and one end of the spiral shaft is provided with a window shoji constituting the window device. In the lift window balancer used by being locked to the locking portion formed in the spiral shaft, the spiral shaft has a small lead angle portion formed at one end side with a lead angle smaller than the lead angle at the other end side. A plurality (N) of the engagement holes are formed at an equal pitch over the length direction of the frame member, and the pitch is such that the length of the small lead corner portion is L. L / (N-1)
A balancer for a lifting window. 2. The lift window balancer according to claim 1, wherein a shaft supporting the operation lever is provided in a direction perpendicular to the window shoji. 3. Around a shaft supporting the operation lever,
3. The balancer device according to claim 2, further comprising a collar made of an elastic material which presses the operation lever. 4. The balancer for a lift window according to claim 1, wherein an outer periphery of said torsion coil spring is covered with a member having a vibration-proof performance.