JP2022185204A - Lowering window opening and closing aid - Google Patents

Abstract

To provide a descending window opening and closing auxiliary tool capable of designing a thickness to be compact and improving durability.SOLUTION: A descending window opening and closing auxiliary tool 1 includes: a body 2 arranged below a descending window; and an arm 4 capable of revolving vertically with a roller 4a on its tip. The body 2 includes a link unit 6, a spring unit 8, and a support unit 12 inside. The link unit 6 is composed in a both-lever mechanism with a part of the body 2 as a fixed joint. The arm 4 is attached to a prime mover joint 6a of the both-lever mechanism to be capable of revolving integrally. The spring unit 8 has coupling metal fittings 8b, 8c coupled to both ends of coil springs 8a arranged in parallel. The coupling metal fitting 8b on one end of the spring unit 8 is coupled to a coupling point 6cc on a follower joint 6c of the both-lever mechanism and a coupling joint 8c on the other end is supported by the support unit 12 through a spring fixing pin 10. A virtual straight line which is in parallel with a stretching direction of the spring unit 8 and passing through the coupling point 6 cc is configured to always pass through in between the joints on both ends of the follower joint 6c.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a window opening/closing mechanism for a railway vehicle, and more particularly to a descending window opening/closing aid for facilitating the opening/closing operation of a side descending window in a suburban vehicle suitable for commuting.

2. Description of the Related Art There are mainly two types of balancers (balancing devices) that are used for a lifting mechanism for a lowering window of a railway vehicle.

One is a swing arm type (also called Schlieren type) balancer using a swing arm that biases the downward window in the closing direction (upward), and the other is a spiral balancer. The spiral type can only be used for lightweight windows (single glass structure), but the swing arm type can also be used for elevating windows that have a larger mass than the spiral type. Among them, the configuration of the swing arm type is shown in FIG.

As shown in FIG. 5, a swinging arm type balancer 200 that supports the lower side of the descending window with a swinging arm 203 is constructed using a link mechanism 201 and a plurality of springs 202 . By the way, the mass of a 1000 mm wide window with a double glazing structure is about 30 kg, which cannot be easily lifted by passengers without assistance. If this heavy window is supported by the swing arm type balancer 200, 20 to 24 springs are required. The swing arm type mechanism has a structure in which the number of springs required for assistance can be changed in consideration of the mass of the window and the operating force. The configuration of such a swing arm type balancer is disclosed in Japanese Unexamined Patent Application Publication No. 2002-200012.

On the other hand, the spiral balancer has a structure that assists the opening and closing operation of the window by a repulsive force generated according to the twist amount of two spiral springs installed on both sides of the window. The configuration of such a spiral balancer is disclosed in Patent Document 2.

Japanese Utility Model Publication No. 33-017450 JP 2008-057653 A

In recent years, aluminum alloy structures with a double-skin structure have become mainstream, and in many cases, the space below the window is narrower than the structure with a single-skin structure using conventional stainless steel. On the other hand, the swing arm type balancer uses a plurality of springs and a complicated link mechanism, which increases the thickness of the device. Therefore, for example, in a double-skin structure, it is necessary to cut out part of the side structure in order to secure a certain cabin space. Depending on the case, there are some vehicle models that cannot be applied because sufficient installation space cannot be secured. In addition, countermeasures such as reinforcement are required for the side structure that is partially notched. Furthermore, a complicated link structure with a large number of springs requires time for maintenance and increases the weight of the device.

In addition, since the spiral balancer has a relatively small repulsive force of the spring, it can be applied only to lightweight windows as described above. In addition, two people are required to perform the adjustment at the time of installation for one window at the same time. In the readjustment after installation, it is necessary to remove the curtain kise that houses the curtain and the curtain groove island in which the groove for guiding the horizontal bar at the lower end of the curtain is formed, so restoration takes time.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a descending window opening/closing aid that can be designed to have a compact thickness and that can be improved in durability.

In order to achieve the above object, a descending window opening/closing aid of the present invention is a descending window opening/closing aid for assisting an opening/closing operation of a descending window of a railway vehicle, the descending window opening/closing aid comprising: a main body arranged below the descending window; It is composed of an arm whose other end is pivotally supported by the main body so that one end can be turned up and down below the lowering window, and a lever mechanism with a part of the main body as a fixed joint. a link part that can rotate integrally with an arm; and a spring part that has one end connected to a connection point on a follower of the link part and the other end fixed to the main body, passing through the connection point, In addition, the imaginary straight line parallel to the direction of expansion and contraction of the spring portion always passes between the joints at both ends of the driven joint.

In addition to the above configuration, the lowering window opening/closing aid of the present invention includes channel steel arranged to extend in the vertical direction on the other end side of the spring portion of the main body, and the channel steel. and a spring fixing pin arranged to penetrate through the opposing wall portions and to which the other end side of the spring portion is connected.

As described above, according to the present invention, an imaginary straight line passing through the connecting point and parallel to the direction of expansion and contraction of the spring portion is always present between the joints at both ends of the driven joint. As a result, it is possible to employ a configuration in which the ends of the spring portions are connected to the connection points in such a manner that they do not overlap with the intermediate joint that connects the driven joint and the driving joint. Therefore, since the driven joint, the intermediate joint and the ends of the spring portion do not overlap at the same time, it is possible to reduce the dimension in the thickness direction.

1 is a perspective view showing a downward window opening/closing aid according to an embodiment of the present invention; FIG. FIG. 2 is a front view showing a usage state of the downward window opening/closing aid of FIG. 1 ; Fig. 3 shows the operation inside the main body, where (a) shows the closed state of the lowering window, (b) shows the intermediate position state, and (c) shows the open state. It is a cross-sectional view around the supporting portion of the main body. It is a figure which shows the internal structure of the conventional descending window opening-and-closing aid.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a descending window opening/closing aid 1 according to an embodiment of the present invention.
As shown in FIG. 1, the lowering window opening/closing aid 1 includes a main body 2 and an arm 4 pivotally supported at one end of the main body 2 so as to be rotatable. A roller 4a is rotatably provided at the tip of the arm 4. As shown in FIG. The arm 4 is configured to be swingable about an arm pivot shaft 4b.

The interior of the main body 2 is roughly divided into a link portion 6 , a spring portion 8 and a support portion 12 . These are explained in order.

The link portion 6 is composed of a double-lever mechanism with the main body 2 as a fixed joint. That is, in the configuration of the present embodiment, a portion of the main body case 2a to which a driving joint 6a and a driven joint 6c, which will be described later, are rotatably connected is used as a fixed joint. The driving joint 6a is rotatably supported by the main body case 2a integrally with the above-described arm turning shaft 4b. The driving joint 6a is connected to the driven joint 6c via the intermediate joint 6b. One end of the driven joint 6c is pivotally supported by the body case 2a in the same manner as the driving joint 6a. In the configuration according to this embodiment, the driven joint 6c is longer than the driving joint 6a. The intermediate node 6b is curved so as to be convex outward.

The spring portion 8 is composed of a plurality of coil springs 8a arranged in parallel and connecting metal fittings 8b and 8c attached to both ends of the coil springs 8a, respectively. The connecting fitting 8b is rotatably connected to the connecting point 6cc on the follower joint 6c of the link portion 6. As shown in FIG. On the other hand, the connecting fitting 8c is connected to the supporting portion 12 via the spring fixing pin 10. As shown in FIG.

The support portion 12 is made of channel steel extending vertically. A spring fixing pin 10 is attached so as to pass through the facing wall portion 12a of the channel steel. Since the spring fixing pin 10 has a screw shaft, the elongation rate of the coil spring 8a of the spring portion 8 can be adjusted by changing the position in the axial direction.

FIG. 2 is a front view showing how the lowering window opening/closing aid 1 is used. The descending window opening/closing aid 1 shown in FIG. 1 is provided in the space below the descending window 101 of the side structure 100 . As described above, the roller 4a is provided at the tip of the rotating arm 4, and the roller 4a is brought into contact with the lower end of the descending window 101 and lifted to support the descending window 101. . Biasing based on the elastic force of the spring portion 8 acts on the arm 4 in a direction to lift the descending window 101, and is set so that the weight of the descending window 101 can be reduced.

As shown in FIG. 1, the main body 2 has a simple thin structure in which the relatively thin link portion 6, the spring portion 8 and the support portion 12 are surrounded by the main body case 2a. As a result, it can be accommodated in a limited space in an aluminum alloy structure having a double-skin structure in recent years without forming a notch in the structure.

Next, the operation of the descending window opening/closing aid 1 will be described.

FIG. 3 shows the internal operation of the main body 2. As shown in FIG. FIG. 3(a) shows the closed state of the descending window, (b) shows the intermediate position state, and (c) shows the open state. The arm 4 including the roller 4a is indicated by a chain double-dashed line, and the illustration of the configuration of portions not directly related to the explanation of the operation is omitted for the sake of convenience.

First, FIG. 3(a) is referred to. When opening the lowering window 101 (see FIG. 2), the arm 4 pivots downward against the bias. As a result, the driving joint 6a of the link portion 6 (see FIG. 1) rotates clockwise. Therefore, since the driven joint 6c also rotates clockwise, one end of the spring portion 8 (connection fitting 8b) connected to the connection point 6cc of the driven joint 6c moves in the direction of extending the coil spring 8a.

FIG. 3(b) shows a state in which the arm 4 has been turned to a substantially horizontal position. At this time, the descending window 101 is in a state of being half opened. Compared to the state of FIG. 3(a), the connection point 6cc on the driven joint 6c is largely drawn toward the driving joint 6a. Therefore, the force with which the arm 4 lifts the descending window 101 becomes larger than that in FIG.

FIG. 3(c) shows a state in which the arm 4 is greatly tilted downward. In this embodiment, the arm 4 is configured so as to be able to turn vertically at substantially the same angle with reference to the horizontal arrangement of FIG. 3(b). Specifically, it is about 40 degrees upward from the horizontal position in the state of FIG. 3(a), and about 40 degrees downward from the horizontal position in the state of FIG. 3(c).

In each of FIGS. 3(a) to 3(c), an imaginary straight line L passing through the connecting point 6cc is drawn as a one-dot chain line. These imaginary straight lines L are parallel to the expansion/contraction direction of the coil spring 8a, and represent the expansion/contraction direction of the coil spring 8a at each opening degree of the descending window 101. As shown in FIG. As can be seen from FIG. 3, in the configuration according to this embodiment, the imaginary straight line L always passes between the joints 6ca and 6cb at both ends of the follower 6c.

That is, it is possible to configure the movable range of the joint 6cb that connects the intermediate joint 6b and the driven joint 6c so as not to overlap the connecting fitting 8b of the spring portion 8. FIG. In particular, since the connecting fitting 8b can be designed leaving a region along the imaginary straight line L that passes through the connecting point 6cc and extends in the direction of expansion and contraction of the coil spring 8a, it is possible to adopt a structure excellent in terms of strength.

Further, by configuring the joint 6cb and the connecting metal fitting 8b so as not to overlap each other, the distance between the driven joint 6c and the connecting metal fitting 8b is designed to be smaller than at least the thickness of the plate material of the intermediate joint 6b. becomes possible. In this way, if the connecting fitting 8b can be brought closer to the driven joint 6c, the pin pivotally supported at the connecting point 6cc can be shortened. By shortening this pivoting pin, the torsional moment acting on the driven joint 6c is reduced. If the lowering window 101 were to be repeatedly opened and closed while the torsional moment was large, the wear of (around the pin supporting the connecting point 6cc) would be severe, and the durability of the link mechanism would be reduced. Therefore, arranging the connecting fitting 8b as close to the driven node 6c side as possible as in the configuration according to the present embodiment is very effective in improving the durability of the link mechanism. In particular, unlike a building, the descending window 101 used in a railway vehicle is constantly exposed to vertical vibrations, so it is important to take measures against abrasion of the movable portion.

FIG. 4 shows a cross-sectional view of the periphery of the support portion 12 of the main body 2. As shown in FIG. Channel steel is used for the support portion 12 as described above for the general configuration. A spring fixing pin 10 is arranged so as to pass through the facing wall portion 12a of the channel steel, and the connecting fitting 8c is rotatably connected to the spring fixing pin 10. As shown in FIG. Therefore, even if the link portion 6 moves and the connecting point 6cc moves up and down, the spring portion 8 can stably follow.

The configuration as described above is an example of the present invention, and the following modifications are also included.

In the above-described embodiment, an example is shown in which the driving joint 6a and the driven joint 6c are formed of one plate-like member, and the intermediate joint 6b is formed of two plate-like members. However, the same effect can be obtained by combining at least one plate-shaped member. Therefore, the number of plate members forming each link piece may be the same.

The descending window opening/closing aid of the present invention has a compact design, but can operate a heavy descending window with a gentle change in force, so it can be used not only for railway vehicles but also for a wide range of vehicles. It is useful for elevating windows and opening and closing doors.

1 Lower window opening/closing aid 2 Main body 2a Main body case 4 Arm 4a Roller 4b Arm turning shaft 6 Link part 6a Driving joint 6b Intermediate joint 6c Follower joints 6ca and 6cb Joint 6cc Connection point
8 Spring portion 8a Coil springs 8b, 8c Connecting fitting (one end) (other end)
10 Spring fixing pin 12 Support part (channel steel)
12a Opposing wall 100 Side structure 101 Down window L Virtual straight line

Claims (2)

A descending window opening/closing aid for assisting the opening and closing operation of a descending window of a railway vehicle,
a body positioned below the descending window;
an arm having one end pivotally supported on said body so that it can pivot up and down below said lowering window;
a link portion composed of a double-lever mechanism with a portion of the main body as a fixed joint, the driving joint being rotatable integrally with the arm;
a spring portion having one end connected to a connection point on the follower of the link portion and the other end fixed to the main body;
A descending window opening/closing aid, wherein an imaginary straight line passing through the connection point and parallel to the expansion and contraction direction of the spring portion always passes between the joints at both ends of the driven joint. a channel steel arranged to extend in the vertical direction on the other end side of the spring portion of the main body;
2. The descending window opening/closing aid according to claim 1, further comprising a spring fixing pin disposed through the opposing wall portions of the channel steel and to which the other end side of the spring portion is connected.

Images