JPS623298Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a drainage structure for a window frame of a sliding side window in a vehicle such as a bus. Generally, in this type of drainage structure, an outwardly opening, substantially U-shaped cavity in cross section is formed between the window frame horizontal member and the vehicle window outer panel, and the opening surface of the cavity is covered with a drainage rubber belt. A drainage hole is provided in the horizontal member of the window frame, and a drainage notch larger than the drainage hole is formed in the draining rubber belt. When the vehicle is running, external pressure is introduced directly into the cavity from the drainage cutout due to the pressure difference between the inside and outside of the vehicle, causing the inconvenience that rainwater accumulated in the cavity is blown up into the interior of the vehicle through the drain hole. In order to eliminate this inconvenience, in the past, a so-called check valve for the drain hole was specially installed on the back side of the horizontal member of the window frame, and when draining, it was opened by the weight of rainwater, and when driving, it was closed by using external pressure. There is. However, providing such a valve around the water drain hole in the window frame side member requires additional parts and requires additional work to install, making it expensive to manufacture. The purpose of the present invention is to provide a drainage structure that can prevent rainwater from blowing up from the drainage holes during high-speed driving during rainy weather without using the valves described above. In order to achieve this, the present invention forms the drainage holes on the side of the window frame horizontal member so that the total area thereof is larger than the total area of the drainage notches on the side of the draining rubber belt. The interior of the space and the interior of the vehicle are always maintained in a nearly equal pressure state to prevent rainwater from blowing up. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a front view of a sliding side window of a bus as seen from the outside of the vehicle, and FIGS. 2 and 3 show a longitudinal cross-sectional view and a cross-sectional view thereof. In these figures, 1 is a window frame fitted into the vehicle body window opening 2, which is composed of upper and lower window frame horizontal members 3, 4 and left and right window frame rigid members 5, 6. It is formed by a vehicle body window outer plate 7 that protrudes from the inside of the vehicle body to the outside. Between the upper and lower horizontal members 3, 4 that constitute the window frame 1 and the vehicle body window outer panel 7, a space 8 having an outward opening and a substantially U-shaped cross section is formed around the window frame 1. The opening surface of the empty space 8 is closed by a drainage rubber belt 9 provided around the outer edge of the window frame 1. and window frame 1
Upper and lower horizontal members 3, 4 and left and right rigid members 5,
The inner periphery of a draining rubber belt 9 is fitted into the grooves 3b, 4b, 5b, 6b at the outer ends of the plate-like bases 3a, 4a, 5a, 6a, respectively. It is placed in contact with 7. The plate-shaped base 4a of the window frame lower horizontal member 4 has drain holes 10 at several locations, for example, at both left and right ends in the longitudinal direction of the lower horizontal member 4, and at an intermediate location therebetween, and at each location, a right end. (the right end part is only on the inside), and two holes are drilled on the inside and outside of it (Figure 4 shows drain holes 10, 10 drilled in two places on both the inside and outside of the left end part). At the lower end of the draining rubber belt 9 extending along the lower horizontal member 4 of the window frame, drainage notches 11 are cut out at both left and right end portions, and are bored in the lower horizontal member 4 of the window frame. The provided drain holes 10 are formed such that the sum of the opening areas of these drain holes 10 is larger than the sum of the opening areas of the drainage notches 11, 11 opened at the lower end of the drain belt 9. has been done. In addition, two rails 3c, 3c, 4c, 4c, 5 are provided on the plate-like bases 3a, 4a, 5a, 6a of the upper and lower horizontal members 3, 4 and the left and right rigid members 5, 6 of the window frame 1, respectively.
The rails 3c, 4c, 5c, 6c extend endlessly, and the rails 3c on the upper horizontal member 3 side and the rails 4c on the lower horizontal member 4 side have windows. The shoji 12, 12 are fitted so as to be slidable in the left and right direction, and the plate bases 3a, 4
Attachment flanges 3d, 4d, 5d, 6d are protruded from the inner ends of each of a, 5a, and 6a,
A sealing material 13 is attached to the fixed portion between the flange portions 3d, 4d, 5d, and 6d and the vehicle window outer panel 7. In the drainage structure of the window frame 1 as described above, when draining water during rain, water accumulates between the rails 4c and 4c on the plate-like base 4a of the lower horizontal member 4 and between the rail 4c and the flange portion 4d. 10 drainage holes for rainwater
... and collects in the hollow part 8 below the plate-shaped base 4a, and the rainwater collected here is carried along the slope of the outer panel 7 of the vehicle window part 7 to the drainage notch 1 of the draining rubber belt 9.
1 and 11 are ejected from the vehicle. Even when the bus is running at high speed and receives strong pressure from the outside of the vehicle, the total opening area of the drain holes 10 is larger than that of the drainage notches 11, 11, so that the inside of the empty space 8 becomes the inside of the vehicle. Since the pressure is maintained close to equal pressure, rainwater accumulated in the cavity 8 does not blow up into the interior of the vehicle through the drain holes 10. Next, we will discuss the window frame drainage structure according to the present invention, the conventional window frame drainage structure (in which the total opening area of the drain holes on the side member of the window frame is smaller than that of the drainage notch on the drain rubber belt side), and the conventional window frame drainage structure. A comparative test with a window frame drainage structure with a check valve is shown. a Test method Window frame for sliding window 1760 span (width 1651 mm, height width
702mm) 4 sliding window shoji (width 834mm, height
693mm), and replace the window shoji to create four sets of sliding windows, creating four types of test windows [A] to [D] as shown below, and each test window was attached to a decompression device. was installed at a constant distance (700 mm) from the shower test device. By applying pressure with the decompression device, a pressure difference is created between the inside and outside, so the water column difference is 0mmAq, 10mmAq, 15mmAq,
We measured the conditions of rainwater infiltration, blowing up, and overflow at four levels of 20 mmAq and three degrees of inclination at the front and back. Running at high speed with water flow rate of 30/min (equivalent to rainfall of 1500mm/H) and pressure of 15mmAq.
Equivalent to 100km/h (assumed). We checked with the Japan Highway Public Corporation to find out how many times there is the steepest slope on the Japanese Expressway, and we conducted a test on a 3-degree incline. [A]; Test window equipped with a check valve on the lower side of the drain hole in the lower horizontal member that constitutes the window frame. Drainage holes are provided at one location each along the inner and outer grooves of the lower horizontal member, with a total area of 139.3mm ² , and drainage notches are provided at five locations at the lower end of the drainer rubber belt, so that the total effective The area is ^500mm2 . [B]; This is a test window with the check valve removed from the test window [A], and the other structure is the same as this test window [A]. [C]; Test window having a drainage structure according to the present invention. 4 along the inner groove of the lower horizontal member that makes up the window frame
Drain holes are provided in places, and the total area is
239.7 mm ² , drainage notches are provided at two locations at the lower end of the draining rubber belt, and the total effective area is 80 mm ² . [D]; A test window having a drainage structure according to the present invention, which is slightly different from the test window [C] in the position and area of the drainage hole. In other words, drainage holes are provided in three locations, one along the outer groove of the lower horizontal member and two along the inner groove, and the total area is
208.8mm ² , and the drainage notch is the same as in test room C, with a total effective area of 80mm ²
It is. b Test Results The test results for test windows [A] to [D] are shown in Tables 1 to 4 below, respectively.

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[Table] c Based on the above test results, the following can be considered. Let's compare Table-1 and Table-2. Let's take as an example the water level and the presence or absence of blow-up when the window is placed horizontally. Regarding the water level, it can be seen that Table 2 has slightly better drainage than Table 1 than the drain hole. Comparing the presence or absence of blow-up, Table 1 is better. It can be seen that the check valve is highly effective here. Also, when the slope is set at 3 degrees, the water level will overflow within 1 minute in both cases. In this state, if the car brakes suddenly while driving at high speed, or goes up or down a slope, water will overflow into the car. It is thought that drainage holes are required at both ends of the lower horizontal frame. Let's compare Table-1 and Table-3. Let's take as an example the water level and the presence or absence of blow-up when the window is placed horizontally. In terms of water level, it can be seen that Table 3 has much better drainage than Table 1. Comparing the presence and absence of blow-up, they are exactly the same. Here, it was found that whether the check valve was present or not, it had nothing to do with the blow-up. Next, when comparing the water levels when the slope is 3 degrees, Table 3 is much better. Here, providing drainage holes at both ends of the lower horizontal frame was very effective.
Table 1 and Table 3 differ in the total area of the drain holes and the total effective area of the drainage notches. In Table 1, the total area of the drainage holes is 139.3mm ² and the total effective area of the drainage notches is 500mm 2 , and in Table 3, the total area of the drainage holes is 239.7mm ² and the total effective area of the drainage notches is 500mm ² . The effective area is ^80mm2 . What can be determined here is that if the total area of the drainage holes is larger than the total effective area of the drainage notches, it is possible to prevent rainwater from blowing up during high-speed driving even without a check valve. . Let's compare Table-1 and Table-4. Let's take as an example the water level and the presence or absence of blow-up when the window is placed horizontally. It can be seen that the water level in Table 4 is much lower than in Table 1, and drainage is better than in the drain holes. This is because in Table 1, if the outside pressure is large and the water is flooded, it will be difficult to drain it forever. Comparing the presence and absence of blow-up, there is no blow-up at all in both cases. Even when comparing the water level when the slope is set at 3 degrees, Table 4 is far superior. From Table 4, it can be determined that there is no problem with rainwater being blown up during high-speed driving even without using a check valve. Also, drainage is much better without a check valve. This difference is largely due to the difference between the total area of the drain holes and the total effective area of the drainage cutouts. Let's compare Table 3 and Table 4. Let's take as an example the water level and the presence or absence of blow-up when the window is placed horizontally. There is no big difference in water level. It is exactly the same whether there is blow-up or not. Comparing the water level when the slope is 3 degrees, Table 4 is superior. There is also not much difference between the total area of the drain holes and the total effective area of the drainage notches. It can be judged that Table 4 is better when climbing and descending hills while driving. As explained above, the drainage structure of the present invention is formed so that the total area of the drainage holes on the side member of the window frame is larger than the total area of the drainage notches on the drainage rubber belt side. Even without installing a special check valve on the bottom side of the hole, it is possible to prevent rainwater from blowing up into the interior of the vehicle when the vehicle is running at high speed during rainy days. As a result, the window frame drainage device can be manufactured easily, and the cost can be expected to be reduced. In addition, when a check valve is installed, dirt and other substances tend to accumulate in the valve mounting part, which impairs the valve function during long-term use and makes it impossible to prevent rainwater from blowing up. It can be said that it has excellent durability without any problems.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Figure 1 is a front view of the sliding side window of a bus as seen from the outside of the vehicle;
Figure 2 is a sectional view taken along the - line in Figure 1, and Figure 3 is a cross-sectional view of Figure 1.
FIG. 4 is an enlarged sectional view taken along the line - in FIG. 1, and FIG. 5 is an enlarged front view of the drainage notch seen from the outside of the vehicle. DESCRIPTION OF SYMBOLS 1...Window frame, 2...Vehicle body window opening, 4...Window frame lower horizontal member, 4a...Plate base, 7...Vehicle body window outer plate, 8...Vacancy, 9...Drainer rubber belt, 1
0... Drain hole, 11... Drainage notch.

Claims (1)

[Scope of utility model registration request] A hollow space with an outward opening and a substantially U-shaped cross section is formed between the window frame horizontal member and the vehicle window outer panel, and the opening surface of the hollow space is closed with a drainage rubber belt. In the drainage structure of a vehicle window frame, in which a drainage hole is provided in the draining rubber belt, and a drainage notch is provided in the draining rubber belt, the total area of the draining hole on the window frame side member side is larger than the draining hole on the draining rubber belt side. A drainage structure for a vehicle window frame, characterized in that the drainage structure is formed to be larger than the total area of the notch.