Window lifting device

Abstract

To provide a window lifting device capable of raising / lowering a movable window with small force.SOLUTION: A movable window 4 used for a railway vehicle is provided to be raised and lowered. An energization member 15 for energizing the movable window 4 upward is provided. The energization member 15 includes a plurality of gas springs 16, 17. A part of one gas spring 16 is arranged to be adjacent to a part of the other gas spring 17 at a center part in the longitudinal direction of the energization member 15. A tip part of a rod 16b of the one gas spring 16 is connected to a cylinder 17a of the other gas spring 17, or a cylinder 16a of the one gas spring 16 is connected to the cylinder 17a of the other gas spring 17.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a window lifting device. [Background technology]

[0002] Windows on the side walls of passenger compartments of railway vehicles are fixed and cannot be opened or closed. However, in recent years, from the perspective of ventilation within the passenger compartment, it has become desirable to be able to open and close the windows on the side walls of the passenger compartment.

[0003] Conventionally, a movable window is provided in a passenger compartment side wall so that it can be opened and closed in the vertical direction. To close the movable window with a light force, a spring member such as a coil spring is used to bias the movable window in the closing direction. Summary of the Invention [Problem to be solved by the invention]

[0004] However, when attaching a spring member to a window provided in a side wall of a passenger compartment, it is difficult to make the vertical length of the coil spring shorter than the height of the window, taking operability into consideration.

[0005] In recent years, windows installed on the side walls of passenger rooms have become larger in size in order to allow passengers to enjoy the scenery outside, and when these windows are opened and closed, the movable windows become large and heavy.

[0006] The weight of the window always generates a constant downward force due to its own weight, while the force generated by the spring member changes proportionally, resulting in an imbalance.In order to improve this imbalance, it is necessary to reduce the spring constant and make the overall length of the spring member as long as possible, but there is a problem in that spring members are subject to the restrictions and conditions mentioned above.

[0007] Therefore, an object of the present invention is to provide a window lifting device that solves the above problems. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides a movable window for use in a railway vehicle that can be raised and lowered, and a biasing member that biases the movable window upward, The biasing member is composed of a plurality of gas springs, a gas spring is disposed adjacent to a portion of another gas spring at a center portion of the longitudinal direction of the biasing member; The gas spring is characterized by the fact that the tip of the rod of one gas spring is connected to the cylinder of another gas spring, or the cylinder of one gas spring is connected to the cylinder of another gas spring.

[0011] In addition, an operating handle may be provided across the entire width of the movable window from one end to the other end, and when the movable window is in a closed state, the closed state of the movable window can be released by moving the operating handle in the direction in which the movable window opens.

[0012] In addition, the movable window has a pair of movable side frames on the left and right, each of the movable side frames being composed of a car body side frame and a window side frame, the car body side frame being attached to the railway vehicle, and the window side frame being detachably connected to the car body side frame, A transparent movable glass may be attached to the vehicle body side frame.

[0013] Further, a spring material having an opening formed in a moving direction of the movable window is provided on the railway vehicle, and a sliding wheel is provided at the opening of the spring material so as to be rotatable relative to the movable window, The sliding ring may be clamped by the spring material, and the contact portion of the spring material or the like may be biased in the axial direction of the sliding ring, thereby suppressing rotation of the sliding ring. [Effects of the Invention]

[0014] According to the invention described in claim 1 of the present application, a biasing member is provided that biases the movable window upward, and a part of one gas spring and a part of another gas spring are arranged adjacent to each other at the longitudinal center of the biasing member, and the tip of the rod of one gas spring is connected to the cylinder of the other gas spring, or the cylinder of one gas spring is connected to the cylinder of the other gas spring.By doing so, the total extension length of the gas spring rod can be made longer than the extension length of the coil spring in the prior art, the repulsive force per unit contraction length of the rod can be made smaller, and the force required to move the movable window can be made smaller than that of the prior art. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a view of a window lifting device according to a first embodiment of the present invention, viewed from the indoor side with a movable window closed. [Figure 2] Cross section of line AA in Figure 1. [Figure 3] 3 is a cross-sectional view of the movable window in the lowered state from the state shown in FIG. 2. [Figure 4] FIG. 2 is a diagram showing a state in which the rod of the biasing member used in the first embodiment of the present invention is extended. [Figure 5] A diagram of the rod extended and retracted from the state shown in Figure 4. [Figure 6] FIG. 10 is a view showing another example of the biasing member used in the first embodiment of the present invention, with the rod extended. [Figure 7] A diagram showing the state in which the rod has been extended or contracted from the state shown in Figure 6. [Figure 8] FIG. 2 is a side view showing the relationship between the movable window and the railcar when the movable window is closed. [Figure 9] 9 is a side view showing the relationship between the movable window and the fixed window when the movable window is lowered from the state shown in FIG. 8. [Figure 10] FIG. 10 is a side view showing the relationship between the movable window and the fixed window when the movable window is fully open. [Figure 11] 11 is a side view showing the relationship between the movable window and the fixed window when the movable window is raised from the state shown in FIG. 10. FIG. [Figure 12]1 is a diagram showing an example of an operation of the window lifting device according to the first embodiment of the present invention; [Figure 13] 10 is a diagram showing another example of operation of the window lifting device according to the first embodiment of the present invention. FIG. [Figure 14] FIG. 2 is a top view of a movable window used in the first embodiment of the present invention. [Figure 15] Front view of Figure 14. [Figure 16] FIG. 10 is a schematic diagram showing the relationship between a spring material, a sliding wheel, an urging member, and a movable window used in Example 2 of the present invention. [Figure 17] FIG. 1 is a schematic diagram showing the state in which the spring material and sliding wheels are attached to a railway vehicle. [Figure 18] 10A and 10B are diagrams showing other examples of spring materials and sliding wheels used in the second embodiment of the present invention. [Figure 19] FIG. 11 is a longitudinal cross-sectional view of the biasing member used in the third embodiment of the present invention, in a state where each extensible member is extended. [Figure 20] FIG. 20 is a longitudinal cross-sectional view of the state in which the extensible members are contracted from the state shown in FIG. 19. [Figure 21] FIG. 10 is a view showing a state in which the rod of the biasing member used in the fourth embodiment of the present invention is extended. DETAILED DESCRIPTION OF THE INVENTION

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the following examples.

[0019] The window lifting device of the present invention is applicable to windows that are installed in railway vehicles and have movable windows that can move up and down, such as side windows installed in the side walls of railway vehicles, side-swing drop windows in the driver's cab or conductor's room, drop windows in the entrance and exit doors of the driver's cab or conductor's room, windows installed in partition doors in passenger compartments, and windows in toilets and service rooms (multipurpose rooms such as washrooms and smoking rooms and nursing rooms), and the following description will be given based on an embodiment in which a side window is installed in the side wall of a railway vehicle.

[0020] [Example 1] As shown in FIG. 1, a window lifting device 1 according to the first embodiment is provided on a side wall 2 of a railway vehicle.

[0021] The window lifting device 1 has a fixed window 3 and a movable window 4 that can move (raise and lower) in the vertical direction. The movable window 4 is provided on the inside or outside of the fixed window 3, and in this embodiment, the movable window 4 is provided on the outside of the fixed window 3 as shown in Figures 2 and 3.

[0022] As shown in Figures 1 to 3, fixed window 3 is provided so as to block the entire horizontal lower portion of opening 5, which is provided in side wall 2 of the railway vehicle and passes through the inside and outside. Movable window 4 is provided so as to be movable in the vertical direction so that when movable window 4 is closed, fixed window 3 and movable window 4 block opening 5, and when movable window 4 is open, the upper portion of opening 5 is open.

[0023] The fixed window 3 has a transparent fixed glass 6, and is fixed to the side wall 2 of the vehicle by means of fixed side frames (not shown) provided on both sides of the fixed glass 6, a fixed upper frame 7 installed between the upper ends of the fixed side frames, and a fixed lower frame 8 installed between the lower ends of the fixed side frames.

[0024] As shown in Figures 1 to 3, the movable window 4 has movable side frames 10, 10 on both sides, a movable upper frame 11 between the upper ends of the movable side frames 10, 10, and a movable lower frame 12 between the lower ends of the movable side frames 10, 10. Transparent movable glass 13 is fixed to the movable side frames 10, 10, the movable upper frame 11, and the movable lower frame 12.

[0025] As shown in Fig. 1, the movable window 4 is biased in the closing direction (upward) by biasing members 15, 15 provided on both lateral sides of the movable window 4. As shown in Fig. 5, each biasing member 15 is composed of two gas springs 16, 17. In this embodiment, the movable window 4 is biased by two biasing members 15, but the number of biasing members 15 may be one, three or more, and can be set as desired.

[0026] The biasing force of the biasing member 15 can be set arbitrarily, but is set so that the biasing force of the biasing member 15 is equal to the weight of the movable window 4 at a position approximately halfway between the closed state and the fully open state of the movable window 4.

[0027] The gas springs 16, 17 have cylinders 16a, 17a, and extendable rods 16b, 17b are provided relative to the cylinders 16a, 17a. Gas is sealed in the cylinders 16a, 17a to bias the rods 16b, 17b in the direction of extension.

[0028] 4 and 5, one gas spring 16 is provided with the cylinder 16a on the upper side and the rod 16b on the lower side, with the axial direction of the one gas spring 16 aligned in the vertical direction. As shown in FIG. 1, one end (upper end) of the cylinder 16a of one gas spring 16 is attached to the upper end of the movable side frame 10 of the movable window 4.

[0029] The other gas spring 17 is provided with the cylinder 17a on the upper side and the rod 17b on the lower side, with the axial direction of the other gas spring 17 being in the vertical direction, as shown in Figures 4 and 5. The other end (lower end) of 17b of the other gas spring 17 is connected to the side wall 2 of the railway vehicle.

[0030] The other end (lower end) of the rod 16b of one gas spring 16 is connected to the cylinder 17a of the other gas spring 17 by a connector 19 so that the other end (lower end) of the rod 16b of one gas spring 16 is at approximately the same position as the other end (lower end) of the cylinder 17a of the other gas spring 17, as shown in Figures 4 and 5.

[0031] In this embodiment, the other end (lower end) of the rod 16b of one gas spring 16 is positioned at approximately the same position as the other end (lower end) of the cylinder 17a of the other gas spring 17, but it may be positioned either on the one end side (upper side) or the other end side (lower side) of the other end (lower end) of the rod 16b of one gas spring 16.

[0032] In addition, in this embodiment, as shown in Figures 4 and 5, one gas spring 16 is arranged with the cylinder 16a on the upper side and the rod 16b on the lower side, but as shown in Figures 6 and 7, the cylinder 16a of one gas spring 16 may be arranged with the cylinder 16a on the lower side and the rod 16b on the upper side, and the cylinder 16a of one gas spring 16 may be connected to the cylinder 17a of another gas spring 17, with the tip of the rod 16b of one gas spring 16 connected to the upper end of the movable side frame 10 of the movable window 4, and the other end (lower end), which is the tip of the rod 17b of the other gas spring 17, may be connected to the side wall 2 of the railway vehicle.

[0033] In addition, with the gas springs 16, 17 shown in Figures 4 and 5 rotated up and down, the tip of the rod 17b of the other gas spring 17 may be connected to the upper end of the movable side frame 10 of the movable window 4, and one end of the cylinder 16a of one gas spring 16 may be connected to the side wall 2 of the railway vehicle.

[0034] As shown in FIGS. 4 and 5, it is preferable to position the gas springs 16 and 17 with the cylinders 16a and 17a on the upper side and the rods 16b and 17b on the lower side, since this makes it difficult for the gas in the gas springs 16 and 17 to leak to the outside.

[0035] In this embodiment, each biasing member 15 is composed of two gas springs 16, 17, but it may be composed of two or more gas springs, and each gas spring is connected in the same way as one gas spring 16 and another gas spring 17, and one end of the gas spring that is not connected is attached to the upper end of the movable side frame 10 of the movable window 4, and the other end of the gas spring that is not connected is attached to the side wall 2 of the railway vehicle.

[0036] By configuring the biasing member 15 as described above, the axis of one gas spring 16 and the axis of the other gas spring 17 are not positioned on the same line but are arranged parallel to each other, and at the center of the longitudinal direction of the biasing member 15, a part of the one gas spring 16 and a part of the other gas spring 17 are adjacent to each other, so that the one gas spring 16 and the other gas spring 17 are connected.

[0037] The movable window 4 has a cylindrical tubular member 18 that extends across the entire horizontal direction on the interior side of the movable upper frame 11, and both ends of the tubular member 18 are rotatably attached to the movable side frames 10, 10, and are biased to rotate upward by a biasing member not shown.

[0038] 1 to 3, an operating handle 20 is provided on the interior side of the cylindrical member 18, spanning the entire length from one end to the other end of the movable window 4. The cylindrical member 18 is biased by a biasing member in a direction that rotates it upward, and therefore the operating handle 20 together with the cylindrical member 18 is also biased in a direction that rotates it upward.

[0039] As shown in FIG. 1, the attachment portions of the cylindrical member 18 to the movable side frames 10, 10 on both sides are not visible from the inside of the room.

[0040] As shown in Figures 1, 12 and 13, the operating handle 20 is provided across the entire width of the movable window 4 from one end to the other, and as shown in Figures 12 and 13, passengers and others on board can operate the operating handle 20 from any position near the movable window 4.

[0041] At both ends of the tubular member 18, a hook-shaped first engagement portion 21 is formed integrally with the tubular member 18 in a location that cannot be seen from inside the room, and the tubular member 18 and the first engagement portion 21 are able to rotate in the vertical direction.

[0042] A hook-shaped second engagement portion 22 that can be detachably engaged with the first engagement portion 21 of the cylindrical member 18 is provided on the side wall 2 of the railway vehicle. As shown in Figures 2 and 8, when the first engagement portion 21 and the second engagement portion 22 are engaged with each other, the movable window 4 can be kept closed.

[0043] The first engaging portion 21 and the second engaging portion 22 may have any structure other than the hook shape shown in FIGS. 2 to 11, as long as they are detachable from each other.

[0044] In order to move the movable window 4 downward, which is the opening direction, from the closed state shown in Figure 8, when the operating handle 20 is pushed downward as shown in Figure 9, the tubular member 18 and the first engagement portion 21 rotate downward against the biasing force of the biasing member (not shown), and the engagement state between the first engagement portion 21 and the second engagement portion 22 is released.

[0045] As shown in FIGS. 2, 3, and 8 to 11, the cylindrical member 18 is provided with a third engagement portion 25 made of a magnet so as to protrude in a direction perpendicular to the operating handle.

[0046] A fourth engagement portion 26 made of a magnet that can be detachably engaged with the third engagement portion 25 is provided on the upper surface of the fixed upper frame 7 of the fixed window 3. The third engagement portion 25 and the fourth engagement portion 26 can have any structure other than a magnet as long as they are detachable from each other.

[0047] When the operating handle 20 is rotated downward, the third engagement portion 25 of the tubular member 18 and the fourth engagement portion 26 of the fixed window 3 are engaged with each other as shown in Figure 10, and the movable window 4 can be maintained in the most open position shown in Figure 3.

[0048] As shown in Figures 3 and 10, when the operating handle 20 is lifted upward, in the direction of closing the movable window 4, from a state in which the third engagement portion 25 and the fourth engagement portion 26 are engaged with each other, the operating handle 20 rotates upward, as shown in Figure 11, and the engagement state between the third engagement portion 25 and the fourth engagement portion 26 is released, allowing the movable window 4 to be moved upward.

[0049] The left and right movable side frames 10, 10 of the movable window 4 are each composed of a carbody side frame 27 and a window side frame 28. The carbody side frame 27 is attached to the side wall 2 of the railway vehicle, and the window side frame 28 is removably connected to the carbody side frame 27. The movable upper frame 11, movable lower frame 12, and movable glass 13 are attached to the window side frame 28. Both ends of the tubular member 18 are rotatably connected to the carbody side frame 27.

[0050] In this embodiment, each movable side frame 10 is made up of a vehicle body side frame 27 and a window side frame 28, but the vehicle body side frame 27 and the window side frame 28 may be formed integrally.

[0051] This allows the mutual connection between the body side frames 27 to be released without removing the entire lifting device 1 from the side wall 2, and by removing both ends of the tubular member 18 from the body side frames 27, the movable window 4 can be removed from the side wall 2, making it easy to perform maintenance such as inspection and repair of the lifting device 1.

[0052] By configuring the biasing member 15 with multiple gas springs 16, 17, the movable distance of the rods 16b, 17b can be increased compared to when the biasing member 15 is configured with a single gas spring, assuming the same vertical length of the biasing member 15. This allows the rods 16b, 17b to move a longer distance in a limited installation space. Furthermore, the amount of gas sealed in the cylinders 16a, 17a can be increased, reducing the reaction force when the rods 16b, 17b contract. Furthermore, by increasing the amount of gas sealed in the cylinders 16a, 17a, the repulsive force of the rods 16b, 17b per unit contraction length can be reduced, allowing the movable window 4 to be moved with a smaller operating force than in the prior art.

[0053] [Example 2] The present embodiment 2 is a modified example of the above-described embodiment 1, and as shown in Fig. 17 , a spring material 30 having a W-shaped cross section and opening laterally and inward is provided on a side wall 2 of a railway vehicle so as to be positioned on both the left and right sides of a movable window 4 as shown in Fig. 16 . A through hole (not shown) is formed in the spring material 30 at the center in the circumferential direction, and a bolt 32 is inserted into the through hole with loose fit, and a nut 33 is screwed onto the bolt 32. The spring material 30 is attached to the side wall 2 by the bolt 32 and the nut 33.

[0054] 17, the spring material 30 is made of a metal having spring properties, has a mounting portion 30a with a through hole formed in its circumferential center, and has tapered portions 30b, 30b formed on both circumferential sides of the mounting portion 30a, which taper toward the side wall 2 as they move outward in the circumferential direction, and has arc-shaped biasing portions 30c, 30c formed on the circumferential outside of each tapered portion 30b, and has an arc-shaped abutting portion 30d at the tip of each biasing portion 30c with a smaller diameter than the biasing portion 30c. Between the abutting portions 30d, 30d, an opening 34 is formed that opens inward in the left-right direction, and this opening 34 is formed in the up-down direction, which is the movement direction of the movable window 4.

[0055] Tightening the bolt 32 or the nut 33 narrows the gap between the contact portions 30d, 30d of the spring material 30, and loosening the bolt 32 or the nut 33 widens the gap between the contact portions 30d, 30d of the spring material 30. A sliding wheel 35 having a circular cross section is rotatably provided in an opening 34 between the contact portions 30d, 30d of the spring material 30.

[0056] The sliding wheel 35 is composed of a pair of large diameter wheels 35a, 35a and a small diameter wheel 35b provided between the large diameter wheels 35a, 35a, and the large diameter wheel 35a is formed so that its diameter increases from the inside to the outside.

[0057] The sliding wheel 35 is sandwiched between the contact portions 30d, 30d of the spring material 30 and is biased toward the center of the sliding wheel 35, so that the spring material 30 prevents the sliding wheel 35 from rotating.

[0058] As shown in FIG. 16, the sliding wheel 35 is rotatably mounted on a connecting rod 37, and the connecting rod 37 is connected to the upper end of the biasing member 15 and the upper end of the movable side frame 10 of the movable window 4.

[0059] As the movable window 4 moves up and down, the connecting rod 37 and sliding wheel 35 also move up and down, and the sliding wheel 35 rotates. The spring material 30 resists the rotation of the sliding wheel 35, so the movable window 4 can be held at any height against movement due to its own weight and the biasing force of the biasing member 15.

[0060] The radius of the arcs of the contact portions 30d, 30d of the spring material 30 may be the same as shown in Figure 17, or as shown in Figure 18, the radius of the arcs of the contact portions 41, 42 of the spring material 40 may be different so that the force urging one contact portion 41 toward the axis of the sliding ring 35 and the force urging the other contact portion 42 toward the axis of the sliding ring 35 are different. For example, the resistance when the sliding ring 35 rotates downward may be greater than the resistance when it rotates upward, making it easier for the sliding ring 35 to rotate upward than downward, thereby making it more difficult for the sliding ring 35 to rotate downward and making it more difficult for the movable window 4 to move downward.

[0061] The rest of the structure is the same as in the first embodiment, so a description thereof will be omitted.

[0062] The second embodiment also provides the same effects as the first embodiment.

[0063] [Example 3] The third embodiment is a modified example of the biasing member 15 of the first and second embodiments.

[0064] As shown in Figures 19 and 20, the biasing member 45 of this Example 3 has a first telescopic member 47 with a smaller diameter than the main body 46 that is extendable and contractable relative to the main body 46, and a second telescopic member 48 with a smaller diameter than the first telescopic member 47 that is extendable and contractable relative to the first telescopic member 47.

[0065] A first telescopic member 47 is provided in a telescopic manner within a main body interior 46a of the main body 46, and gas is sealed within the space surrounded by the casing 46b of the main body 46 and the first telescopic member 47, and this gas urges the first telescopic member 47 in the extension direction. A second telescopic member 48 is provided in a telescopic manner within a first telescopic interior 47a of the first telescopic member 47, and gas is sealed within the space surrounded by the casing 47b of the first telescopic member 47 and the second telescopic member 48, and this gas urges the second telescopic member 48 in the extension direction.

[0066] As described above, the main body 46, the first telescopic member 47, and the second telescopic member 48 are arranged and formed in a telescopic manner.

[0067] The movable window 4 is biased upward by a biasing member 45 .

[0068] Although the biasing member 45 is provided with two expandable members 47, 48, this number can be set arbitrarily as long as it is two or more, and the main body 46 and the multiple expandable members are arranged and formed in a telescopic manner, and each expandable member is biased in the extension direction by a gas sealed inside the member arranged outside it, and the biasing member 45 is composed of a telescopic air cylinder.

[0069] The rest of the structure is the same as in the first and second embodiments, so a description thereof will be omitted.

[0070] The third embodiment also provides the same effects as the first and second embodiments.

[0071] In this embodiment 3, as with the biasing member 15 of the above-mentioned embodiment 1, the repulsive force per unit contraction length of the expansion and contraction members 47, 48 in the biasing member 45 can be made smaller than that of the coil springs of the prior art, and the force required to move the movable window 4 can be made smaller than that of the prior art.

[0072] [Example 4] The fourth embodiment is a modification of the biasing members 15 and 45 of the first to third embodiments.

[0073] 21, the biasing member 51 of the fourth embodiment is made up of one gas spring 52 and an auxiliary tank 53. The gas spring 52 is made up of a cylinder 52a and a rod 52b that is provided so as to be extendable and contractible relative to the cylinder 52a. A space provided within the cylinder 52a of the gas spring 52 and an internal space formed in the auxiliary tank 53 are in communication with each other via a communication passage 54.

[0074] A gas is sealed in the space provided in the cylinder 52a and the internal space of the auxiliary tank 53, and the gas constantly urges the rod 52b in the direction of extension.

[0075] By having the auxiliary tank 53, the volume of gas sealed in the urging member 51 is increased compared to when it is configured with a single gas spring, and the repulsive force per unit contraction amount of the rod 52b can be kept low.

[0076] The communication passage 54 can be made of a metal pipe, a resin hose, or the like, and its length can be set arbitrarily other than that shown in Figure 21. Furthermore, the position of the auxiliary tank 53 can be set at any location on the railway vehicle other than near the cylinder 52a as shown in Figure 21, and the volume of gas in its internal space can also be set arbitrarily.

[0077] The movable window 4 is biased upward by a biasing member 51.

[0078] The rest of the structure is the same as in the first to third embodiments, so a description thereof will be omitted.

[0079] The fourth embodiment also provides the same effects as the first to third embodiments.

[0080] In this fourth embodiment, as with the biasing members 15 and 45 of the first to third embodiments, the repulsive force per unit contraction length of the rod 52b in the biasing member 51 can be made smaller than that of the coil spring of the prior art, and the force required to move the movable window 4 can be made smaller than that of the prior art.

[0081] [Other Examples] In the first and second embodiments, the fixed window 3 is provided on the lower side and the movable window 4 is provided on the upper side, but the fixed window 3 may be provided on the upper side and the movable window 4 on the lower side.

[0082] Furthermore, the fixed window 3 may be configured to move up and down by providing a movable window 4 and its associated members in the same manner.

[0083] The rest of the structure is the same as in the first to third embodiments, so a description thereof will be omitted.

[0084] This embodiment also provides the same effects as those of the first to third embodiments. [Explanation of symbols]

[0085] 1. Window lifting device 4 Movable windows 10 Movable side frame 13 Movable Glass 15, 45, 51 biasing member 16a, 17a, 52a cylinder 16b, 17b, 52b rod 16. One gas spring 17 Other Gas Springs 20 Operating handle 27 Body side frame 28 Window frame 30, 40 Spring material 35 Sliding wheel 53 Auxiliary Tank

Claims

1. A movable window for use in a railway vehicle is provided so as to be movable up and down, and a biasing member is provided for biasing the movable window upward; The biasing member is composed of a plurality of gas springs, A part of one gas spring and a part of another gas spring are arranged adjacent to each other at a central portion of the longitudinal direction of the biasing member, A window lifting device characterized in that the tip of the rod of one gas spring is connected to the cylinder of another gas spring, or the cylinder of one gas spring is connected to the cylinder of another gas spring.

2. A window lifting device as described in claim 1, characterized in that an operating handle is provided over the entire lateral end of the movable window from one end to the other end, and when the movable window is in a closed state, the closed state of the movable window is released by moving the operating handle in the direction in which the movable window opens.

3. the movable window has a pair of movable side frames on the left and right, each of the movable side frames being composed of a car body side frame and a window side frame, the car body side frame being attached to the railroad car, and the window side frame being removably connected to the car body side frame, 3. A window lifting device according to claim 1, wherein a transparent movable glass is attached to said vehicle body side frame.

4. a spring material having an opening formed in a moving direction of the movable window is provided on the railway vehicle, and a sliding wheel is provided at the opening of the spring material so as to be rotatable with respect to the movable window; A window lifting device as claimed in any one of claims 1 to 3, characterized in that the sliding wheel is clamped by the spring material, and the abutment portion of the spring material etc. is biased in the axial direction of the sliding wheel by the spring material, thereby suppressing rotation of the sliding wheel.

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