JP2613184B2 - Hatch structure for snow opening such as snow ditch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hatch structure for a snow opening such as a snow ditch and, more particularly, to a snow ditch as an underground waterway provided under a road as a snow countermeasure facility in a snowy city. A snow gutter that collects the snowfall on the top of the snow, which can be closed and closed by the hatch plate. And a hatch structure for a snow opening.

[0002]

2. Description of the Related Art As a conventional hatch structure for a snow hole in a snowfall groove or the like, for example, a hatch plate is hinged on the top of the snow hole so as to be swingable, and the hatch plate is reduced to almost its entire weight. It is usual to open and close manually by opening and closing this type of hatch plate, and a gas spring that supports a part of the hatch plate is provided in a suitable place of this type of hatch plate. The use as an auxiliary power has already been proposed.

Japanese Unexamined Patent Publication (Kokai) No. 3-156,041 discloses an opening / closing mechanism for transmitting and manipulating a rotational force of an operation handle at a reduced speed to a groove cover which is swingably attached to an opening of a snowfall groove. By providing the groove cover, the groove cover opening / closing device for a snowfall groove that can easily open and close the groove cover is disclosed in Japanese Utility Model Laid-Open No. 1-176187.
Japanese Patent Laid-Open No. 2-148,086 discloses a snow throwing mouth cover for a sidewalk snowfall groove in which the opening and closing operability of the snow throwing mouth is improved by forming the snow throwing mouth cover with a lightweight material. Discloses an opening / closing lid for a snowfall groove in which a urethane resin coating film is formed on the frame to prevent the frame from sticking to the support frame of the opening of the snowfall groove due to freezing. ing.

[0004]

First, a hatch plate is pivotally attached to the top of a conventional snow opening by a hinge so as to be swingable, and the hatch plate is manually opened and closed against almost the entire weight of the hatch plate. Requires a great deal of labor to open and close, and it is particularly difficult for elderly people to open and close it.
When the gas spring provided around the hatch plate is used as an auxiliary power for opening the gas spring, there is a possibility that the performance of the gas spring may be deteriorated due to the gas leak due to aging, and it is necessary to secure the gas spring pressure. There was a problem that it took time and money.

[0005] The snow cover groove cover opening and closing device described in Japanese Patent Application Laid-Open No. 3-156,041 is provided with an opening and closing operation mechanism for operating the operating hand to reduce and transmit the rotational force by the operating hand. Although the mechanism can be opened and closed mechanically, the operation mechanism is not only complicated, but also increases the cost for preventing the freezing of the drive mechanism in conjunction with the hatch main body. Since the snow cover of the snow pavement for sidewalks disclosed in Japanese Patent No. 176187 is made of a lightweight material, the opening and closing operation of the cover can be performed relatively easily. Further, if a urethane resin film is applied to the frame of the opening / closing lid as in the opening / closing lid for a snow drift described in Japanese Utility Model Application Laid-Open No. 2-148,086, the opening of the frame and the opening of the snow drift can be reduced. Prevents freezing of the opening with the support frame Remains to be, here is the operation improvement measures are not observed.

In addition, the snow channel in which the snow opening 6 is installed may use a sewage channel for sewage treatment buried underground in an urban area. In this case, the sewage channel or the sewage channel flows through the sewage channel. The odor and the like of the sewage flowing from the snow throwing port installed in the groove constantly rise, and in particular, a large amount of odor is diffused from the opened snow throwing port to the surrounding area. Also, when a snow outlet is provided in a drainage ditch such as a hot drain having high thermal energy after use such as a heating and cooling device installed in an urban area, the snow outlet is raised by opening the snow outlet. Odors and the like are dissipated in the same manner as described above.

Further, since the snow gutter, the snow melting tank and the like are usually provided at a position considerably deeper than the road surface and have a considerably large size, a snow throwing hole provided at the top thereof is connected to the snow gutter by the snow gutter. It will be provided at a considerable height, and during the period from the opening of the snow opening to the start of snow throwing, a worker or the like who throws work into the snow opening concerned falls down into the snow opening which is opened by mistake. It was necessary to take some measures to prevent this.

[0008] In addition, the snow exit to the snow channel is often provided at the corner of the road, and if the snow exit is opened for a long time and the snow continues, the traffic on the road can be prevented. Since it causes traffic congestion, it is desirable to configure the opening and closing operation of the hatch of the snow opening so that the operation can be performed as quickly as possible.
Since the weight of snow, which is a crystal of water vapor, is large, it is desirable to shorten the transport distance, and to reduce the amount of snow thrown from each snow opening to promote snow melting in the snow drift, In view of the desire to provide as many snow openings as possible in the groove, it is desired to simplify the hatch structure as much as possible to reduce the cost.

In view of such a problem in the conventional example, the present invention provides a rectangular snow throwing frame 6 at the top of the snow throwing hole 5 in the snow throwing area 2 on the snow drift groove 3, snow melting tank or the like. The bases of the hatch plates 15 and 35 are attached to the rectangular hatch frame 11 to be mounted on the snow port frame 6 via the hatch shaft 20, and the lower hatch shaft 20 is interlocked with the hatch shaft 20. A balance weight shaft 22 is provided, and the base of an arm 24 with a balance weight 25 is attached to the balance weight shaft 22, so that the opening and closing operations of the hatch plates 15, 35 can be performed lightly and manually. An object of the present invention is to provide a hatch structure for a snow port.

[0010]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, in order to solve the above-mentioned problems. A rectangular hatch frame 11 having substantially the same shape as the frame 6 is mounted on the rectangular frame 6, and the hatch plates 15, 3
5, one or a plurality of hatch receiving plates 13, 1 supporting the lower end of hatch plates 15, 35 on the other side of the hatch frame 11 via a hatch shaft 20 so as to be swingable.
Are provided, and a balance weight shaft 22 is provided below the hatch shaft 20 in parallel with the hatch shaft 20 and interlocked with the hatch shaft 20, and an arm with a balance weight 25 is provided on the balance weight shaft 22. When the hatch plates 15, 35 close the hatch opening 10A, the arm 24 comes close to the hatch plate 15, and the hatch plates 15, 35 rise up to the opening 10A. Is open, the arm 24 is attached so that the arm 24 hangs down substantially vertically.

Also, a stop pin 13A is provided on one of the hatch receiving plate 13 or the plurality of hatch receiving plates 13, 13,..., And the hatch plate 15, 35 is provided below the end of the hatch plates 15, 35. In the closed state of the hatch opening 10A by 35, a bell crank-shaped hook 17 that engages with the stop pin 13A is pivotally mounted on a shaft 18, and the bell crank-shaped hook 17 is attached to the hatch plate 15, 35
Automatically securing the engagement state with the locking pin 13A in the closed state of the hatch opening 10A,
Further, in the closed state of the hatch opening 10 </ b> A by the hatch plates 15 and 35, the hook portion 1 of the bell crank-shaped hook 17 attached to the shaft 18 below the end of the hatch plate 15.
7B is provided with a stopper 19 at the lower side of the ends of the hatch plates 15 and 35 for preventing the stopper pin 13A from retreating excessively.

[0012]

Since the present invention has the above-described structure, a rectangular snow opening frame 6 provided at the top of the snow opening 5 in the snow area 2 above the snow flow groove 3 or the like has a rectangular shape. Hatch plates 15 and 35 having a hatch frame 11 attached thereto and a base attached to one side of the hatch frame 11 via a hatch shaft 20, and a balance weight 25 on a balance weight shaft 22 linked to the hatch shaft 20. With the arm 24, the hatch plates 15, 35
Since the balance weight 25 and the balance weight 25 are almost always balanced, the hatch opening 10A is opened only by lightly pulling up the ends of the hatch plates 15 and 35 manually, and in this opened state, the balance weight 25 is disengaged from the balance weight shaft 22. By hanging the hatch plate 1 in the upright state, the hatch plates 15 and 35 maintain the open state of the hatch opening 10A in a stable state and the hatch plate 1 in the upright state.
In addition to preventing scattering of the snow throwing around the hatch opening 10A, the balance weights 25 and the arms 24 in the hanging state retreat to the side wall side of the snow opening 5, so that the snow opening 5 Does not hinder the fall of snow that is thrown into the hatch, and a slight target pressure in the closing direction of the end portions of the hatch plates 15 and 35 standing up causes the hatch opening 10A and therefore the snow opening 5
Is closed lightly and quickly by the hatch plates 15 and 35, and quickly returns to a state in which vehicles and pedestrians can pass.

At the same time as the hatch opening 10A is closed by the contact between the lower end of the hatch plates 15 and 35 and the hatch receiving plate 13, a bell-crank-shaped shaft 18 is attached to the lower end of the hatch plates 15 and 35. The hook portion 17B of the hook 17 rotates around the shaft 18 and automatically engages with the stopper pin 13A protruding from the hatch receiving plate 13 by the biasing force of the base portion 17A. The closed state of the unit 10A is ensured.

From the operation hole 15B of the hatch plates 15, 35 or the rainwater slit 35Bb, for example, the operation rod 32
And hooking the locking portion 34 of the same end under the base 17A of the bell crank-shaped hook 17 so that the base 17
When A is lifted, the base portion 17A becomes the hatch plates 15, 35.
19 or the hatch plates 15, 35 provided on the lower side of
6, the hook 17B is separated from the stop pin 13B to release the engaged state, and the operating rod 32 is pulled. Subsequently, the hatch plate 1
5 and 35 swing clockwise around the hatch axis 20 in FIG. 2 to open the opening 10A.

At this time, the bell crank-shaped hook 17
The upper portion of the base 17A contacts the stopper 19 to prevent the bell crank-shaped hook 17 from retreating excessively rotating instead of the shaft 18, thereby causing the bell crank-shaped hook 17 to become inoperable. There is no fear.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hatch structure for a snow throwing port such as a snow drift according to the present invention will be described below with reference to FIGS.

FIG. 1 shows an embodiment of a hatch structure for a snow throwing port such as a snowfall groove according to the present invention, and shows a snow throwing port hatch 10 with its hatch plate 15 standing upright. FIG. 2 is a schematic longitudinal sectional view of the snow throwing port 5 when the hatch plate 15 is laid down, and FIG. 2 shows the upright state of the hatch plate 15 in a one-dot chain. Are also abbreviated.

FIG. 3 shows a hatch opening 10A by a hatch plate 15.
FIG. 4 is a schematic plan view of the top of the snow opening 5 in a state where the snow is closed.
FIG. 5 is a schematic plan view showing the hatch frame plate 12, the screen 30, and the balance weight shaft 22 around the hatch frame 11, which is cut along the line AA in FIG. 2, and FIG.
FIG. 4 is a schematic vertical cross-sectional explanatory view of the top of the snow opening 5 along the line B, in which a snow flow groove 3 is provided below the snow opening 5 by a dashed line. FIG. 6 is a schematic side view of the end of the hatch plate 15 formed by excavating the bell-crank hook 17 on the shaft 18, and FIG. 7 is a schematic side view of the operation rod 32 for opening and closing the hatch plate 15.

In FIGS. 1 to 7, reference numeral 1 denotes a road surface on which a vehicle or the like travels, and 2 denotes a roof or a road on which snow flows into a snowfall groove 3 or a snowmelt tank (not shown) through an opening 5 for snow. In the snow throwing area where snow is collected and snow is thrown, a snow throwing port frame 6 having a rectangular shape in plan view is provided at the top of the snow throwing port 5 provided in the snow throwing area 2. The snow opening frame 6 is formed by fixing four frame plates 7 each having an L-shaped cross section by welding or the like in a rectangular shape in plan view, and positioning positioning plates 8, 8,... And stick
The positioning plates 8, 8... Are embedded in a concrete around the top of the snow opening 5 or on the pavement road surface 1.

Reference numeral 10 denotes a snow hatch provided at the top of the snow hat 5, 10 A denotes an opening of the hatch 10, and 11 denotes a snow hat frame 6.
, A rectangular hatch frame 12 mounted on a concave portion 7B formed inside the L-shaped frame 7, a hatch frame 12 provided on the top of a hatch frame 11, and the hatch frame 12 It is installed at almost the same height. Are a plurality of hatch receiving plates for supporting the lower side of the end of the hatch plate 15. The hatch receiving plates 13, 13,... Is firmly fixed by welding or the like so as to protrude.

When the width of the hatch opening 10A is relatively small, the hatch receiving plate 13 has the same shape.
It is also possible to provide only one or two of the openings 10A at substantially the center of A so as to equally divide the openings 10A. If a synthetic resin seat plate (not shown) is provided on the horizontal top of the hatch receiving plate 13, the occurrence of freezing between the portion and the lower surface of the hatch plate 15 is suppressed.

Reference numerals 15A and 15B denote notches and operation holes provided in the hatch plate 15. A bearing 20B for supporting the central portion of the hatch shaft 20 is inserted into the notch 15A. The bell crank-shaped hook 17 is mounted on a shaft 18 below the front end of the hatch plate 15 so that the base 17A of the hook 17 is located. As shown in FIG. 6, the bell-crank hook 17 has its own weight of the base 17A of the bell-crank hook 17 in a state where the hatch plate 15 lays down horizontally and closes the opening 10A of the hatch 10. The hook 17 rotates from the dashed line position to the solid line position in FIG.
Are configured to automatically lock the hatch plate 15.

Reference numeral 16 denotes a nylon resin plate 16 for covering the lower surface of the hatch plate 15. If the lower surface of the hatch plate 15 is covered with such a nylon resin plate 16, dew condensation and freezing on the lower surface can be suppressed. In this case, the installation of the synthetic resin plate on the hatch receiving plate 13 can be omitted.

Reference numeral 21 denotes a first fixed to the end of the hatch shaft 20.
A gear 22, 22 is a balance weight shaft provided below and parallel to the hatch shaft 20, and 23 is a second gear provided on the balance weight shaft 22. The second gear meshes with the first gear 21, and the hatch plate 15 forms a horizontal shape. When the opening 10A of the hatch 10 is closed, the arm 24 extending from the balance weight shaft 22 is horizontal and substantially parallel to the hatch plate 15, and the balance weight 25 and the arm 24 are in the same hatch. It is close to the plate 15.

When the hatch plate 15 is raised upright, the arm 24 hangs down almost vertically via the first and second gears 21 and 23 and the balance weight shaft 22, and at the same time, the balance of the ends thereof is maintained. The weight 25 is retracted to the position shown by the dashed line (right side) in FIG. 2 so as to approach the side wall of the snow opening 5, and is arranged so as not to hinder falling of snow thrown from the hatch opening 10A.

Reference numeral 30 denotes a rectangular shape of the snow opening frame 11
And a screen provided in parallel with the hatch shaft 20 so that the upper surface of the screen 30 is substantially in contact with the lower surface of the hatch plate 15 in the closed state. . Reference numeral 32 denotes an operation rod, which releases the engagement between the hook portion 17B of the bell crank-shaped hook 17 and the stop pin 13A, and opens and closes the hatch plate 15. Reference numerals 33 and 34 denote gripping portions at the top of the operating rod 32 and locking portions at the ends.

(Operation of the Embodiment) The operation stick 3 grasped manually.
2 is inserted into the operation hole 15B of the hatch plate 15, and the locking portion 34 at the end of the operation rod 32 is connected to the bell crank-shaped hook 17
When the bell crank-shaped hook 17 is rotated counterclockwise around the shaft 18 in FIG. 6 from the solid line position in FIG. And the stop pin 13A is disengaged.

Subsequently, the operating rod 32 is pulled up, or the operating rod 32 is rotated, for example, by 180 ° in the operating hole 15B, so that the locking portion 34 and the bell crank-shaped hook 17 are rotated.
After the engagement with the base 17A is released, the engagement portion 34 is engaged with the lower surface of the hatch plate 15 around the operation hole 15B, and then the operation rod 32 is pulled up. 17, the end portion of the hatch plate 15 is pulled up by being engaged around the operation hole 15B of the hatch plate 15 with or without the base portion 17A, and the hatch plate 15 is moved clockwise around the hatch axis 20 in FIG. 2, the angle θ (for example, about 95 °) turns from the solid line position to the dashed line position and stands up, and becomes the state of the dashed line of FIG. 2 or the state of FIG. Therefore, the top of the snow opening 5 is opened so that the snow opening 5 can be thrown. The swing angle θ of the hatch plate 15 is usually set to about 95 to 120 °.

At this time, the arm 24 and the balance weight 25 move counterclockwise from the solid line position in FIG. 2 through the balance weight shaft 22 by meshing between the first gear 21 and the second gear 23, that is, the hatch. The arm 24 and the balance weight 25 approach the side wall of the snow opening 5, and the snow is thrown into the snow opening 5. There is no danger of hindering the fall.

After the snowfall from the opening 10A to the snowfall groove 3 through the snowfall opening 5 is completed, the top of the hatch plate 15 that stands vertically is held by the locking portion 34 of the operating rod 32 or manually from the back side. When pressed lightly, the hatch plate 15 rotates around the hatch axis 20,
In FIG. 1, the hatch opening 10 </ b> A is closed by turning clockwise in the direction of a thick arrow and counterclockwise in FIG. 2, and at the same time, the balance weight shaft 22 and The arm 24 and the balance weight 25 on the same axis return to the solid line position from the hanging vertical state of the dashed line in FIG.

The inside of the raised hatch plate 15 has a function of preventing scattering of snow into the snow opening 5 around the snow opening 5 and a screen provided inside the hatch frame 11. The screen 30 is hung on the hatch opening 10A, that is, on the top opening of the snow opening 5, by the screen 30, so that the snow opening on the snow opening 5 is not hindered. To prevent inadvertent falls of workers etc.

(Variations of Hatch Plates) Next, variations of the hatch plates in the hatch structure for a snow throwing port such as a snowfall groove according to the present invention will be described with reference to the innumerable rainwater slits 35B, 35B.
Description will be made with reference to a schematic plan view of the hatch plate 35 provided. The structure for attaching the hatch plate 35 to the snow opening hatch 10 shown in FIG. 8 and the operation procedure itself are shown in FIGS.
Since they are almost the same as those of the above-described embodiment, their illustration and detailed description are omitted here.

In FIG. 8, reference numeral 35A denotes a notch provided in the hatch plate 35, in which the bearing 20B of the hatch shaft 20 is inserted. In substantially the same manner, the hatch frame 11 of the snow hole hatch 10 at the top of the snow hole 5 is swingably mounted via a hatch shaft 20.

35B, 35B... Are countless rainwater slits provided on the hatch plate 35, 35Bb is a rainwater slit around a bell crank-shaped hook 17 (not shown) provided below the end of the hatch plate 35, and 35C is a timer Is a mascot pattern with the right hand raised, and 35D is a mascot pattern with the left hand lowered with a tomato, and 35E is a character pattern in which the character “East” is made into a figure.

The shape of the rainwater slit 35B provided on the hatch plate 35 and the mascot patterns 35C, 35C
D and the character pattern 35E are the left and right mascot patterns 3
5C and 35D can be formed in any suitable shape other than the illustrated example in addition to being able to have the same pattern, and it is needless to say that the number and size thereof can be arbitrarily selected.

The opening and closing operation of the hatch plate 35 is performed in substantially the same manner as in the above-described embodiment by using a rainwater slit 35Bb formed around a bell-crank hook 17 pivotally attached to a shaft 18 below the front end of the hatch plate 35. When the end of the operating rod 32 is inserted, and the locking portion 34 at the end of the operating rod 32 is engaged with the base 17A below the bell crank-shaped hook 17 and pulled up, the bell crank-shaped hook 17 is moved as shown in FIG. In the counterclockwise direction around the shaft 18 from the solid line position to the one-dot chain line position, the engagement between the hook portion 17B and the locking pin 13A is released, and the operating rod 32 is further pulled up. As a result, the hatch plate 35 is raised to open the opening 10A in the same manner as in the above embodiment.

Since the hatch plate 35 of this modified example is provided with countless rainwater slits 35B, 35B,... No need. In addition, since the hatch plate 35 is provided with countless rainwater slits, it is not possible to expect an effect of trapping odors and the like rising from the snow throwing hole 5, but on the other hand, it is excellent in flowability of rainwater and the like. The other structure and operation of the hatch plate 35 are almost the same as those of the hatch plate 15 of the above embodiment.

[0038]

Since the present invention has the above-described structure and operates, the following effects can be obtained.

(1) Since the hatch shaft 20 and the balance weight shaft 22 are interlocked to balance the hatch plates 15, 35 and the balance weight 25, the hatch plate 1
A large force is not required for the opening and closing operations of 5, 35, and even children and elderly people can operate without difficulty.

(2) When the hatch plates 15 and 35 close the hatch opening 10A, the stop pins 13
A, a bell-crank hook 17 is rotatably mounted on the shaft 18, and the bell-crank hook 17 is engaged with the locking pin 13 </ b> A when the hatch plates 15, 35 are closed.
And the hatch plates 15 and 35 allow the opening 10A of the hatch 10 to be automatically secured.
By simply closing the hatch, the hatch plates 15 and 35 ensure that the hatch opening 10A is closed without aggressive locking and locking operations. Even if it occurs, there is no risk of inadvertent opening of the hatch plates 15 and 35, and the locked state can be easily released by raising the base 17A of the bell crank-shaped hook 17 as needed.

(3) If a large number of rainwater slits 35B are provided in the hatch plate 35, the slits 35Bb around the crank-shaped hook 17 can be used.
In the case of the hatch plate 15 without the rainwater slit 35, the operation rod 32 is inserted through the operation hole 15B, and the locking portion 34 at the end thereof is engaged with the lower side of the hook portion 17B of the crank-shaped hook 17. The hook portion 17B of the crank-shaped hook 17 is disengaged from the stop pin 7 by being pulled upward and the hatch plate 15 or 35 is raised,
The opening 10A of the hatch 10 is opened.

(4) In addition, the standing hatch plates 15, 3
When the rear end of the top of 5 is pressed to close the opening 10A of the hatch 10, the hook portion 17B of the hook 17 automatically engages with the locking pin 13A, and the locked state of the hatch plates 15, 35 is ensured. .

(5) A large force is not required for opening and closing the hatch plates 15 and 35. Even if the weight of the snow throwing hatch 10 is slightly increased in order to secure the strength, the opening and closing operation of the hatch plates 15 and 35 is manually performed. Hatch boards 15, 3
5, the material selection range of the snow opening hatch 10 is widened. For example, the snow hatch 10 is excellent in corrosiveness and durability and has sufficient strength.
Since the hatch plates 15 and 35 can be made of a cast iron material or the like that can be easily designed, various hatch structures for a snow opening can be provided without fear of incurring extra cost.

(6) One of the hatch frames 11 of the snow opening hatch 10 mounted on the snow opening frame 6 provided at the top of the snow opening 5 in the snow throwing area 2 on the snow drift groove 3, snow melting tank, or the like. Hatch plate 1 on the side
Lower portions of one side of the hatch frames 11 and 5 are swingably mounted via a hatch shaft 20, and hatch plates 15 and 35 are attached to the other side of the hatch frame 11.
A single or a plurality of hatch receiving plates 13 for supporting the lower side are provided at appropriate intervals, and a balance weight shaft 22 interlocked with the hatch shaft 20 is provided below the hatch shaft 20 in parallel, and The base of the arm 24 with the balance weight 25 is attached to the balance weight shaft 22 by the hatch plate 15,
When 35 closes the opening 10A, the hatch plate 1
When the hatch plates 15 and 35 stand upright and open the hatch opening 10A, they are attached so as to hang down substantially vertically.
In addition, the hatch 10, especially the hatch plates 15, 35 and the arm 24 with the balance weight 25 in the assembled state of the hatch 10, have a structure in which the arms 24 with the balance weights 25 are close to each other and are not bulky, and are assembled. In addition to being able to manufacture at low cost in a factory where it is easy to achieve machining accuracy until almost completion, the transportation and storage costs are reduced due to the narrow space of the assembled state, and the same type of hatch structure for snow throwing ports The number of assembly steps at the construction site has been significantly reduced compared to
As a result, the assembly accuracy and productivity are significantly improved.

(7) Since the arm 24 to which the balance weight 25 is attached hangs substantially vertically in the upright state of the hatch plates 15 and 35, a part of the snow hole 5 is required to attach the hatch 10. Alternatively, it is not necessary to form the entirety into a unique shape, and it is sufficient if the snow throwing port 5 is formed in a simple rectangular tube shape, and the installation cost can be reduced.

(8) Snowfall area 3 such as snowfall groove 3, snowmelt tank, etc.
The hatch plates 15, 35 of the snow opening hatch 10 at the top of the snow opening 5 can be lightly opened and closed only by hand, so that the time required for the opening and closing operation of the snow opening 5 is reduced, and as a result, The time that hinders the passage of a pedestrian or the like is significantly reduced as compared with the conventional example, and it is necessary to install a drive mechanism such as a gas spring and a hydraulic pressure for the opening and closing operation of the hatch plates 15 and 30. Since there is no maintenance, there is no need to take any maintenance measures such as aging leakage of gas, pressurized oil, etc., and the running cost is significantly reduced.

(9) In the case of the hatch plate 15 not provided with the rainwater slit 35B, the operation hole 15B for opening the bell crank-shaped hook 17 is provided in the hatch plate 15.
Since there is no need to provide an opening in the hatch plate 15 except where the hatch plate 15 is provided, in a snow throwing hatch structure including the hatch plate 15, when the hatch plate 15 is opened, there is a snowfall. Dispersion of odor and the like rising from the groove 3 through the snow opening 5 can be prevented by the hatch plate 15 in a closed state, and thus, odor emission from the snow flow groove 3 around the snow opening hatch opening 10 can be significantly suppressed.

(10) If a stopper 19 for preventing excessive swinging of the bell crank-shaped hook 17 in the opening direction around the shaft 18 is provided, the hook portion 17B of the bell crank-shaped hook 17 and the stopper pin 13B are temporarily supposed to be vibrated or the like. Even if the engagement with the hook is released, the bell crank-shaped hook 17 rotates around its axis 18 due to the weight of the base 17A, and the hook 17B immediately returns to the engaged state with the locking pin 13A. Due to the engagement between the stopper 19 and the upper side of the base 17A, the bell crank-shaped hook 17 largely rotates in the opening direction around the shaft 18 (counterclockwise in FIG. 6), and the hook 17B and the stopper pin There is no danger that it will not be possible to engage with 13A.

(11) If the screen 30 is provided between the hatch frame plates 12, the worker can access the snow port 5 with the opening 10A of the hatch 10 opened by the standing of the hatch plates 15, 35. There is no danger of inadvertent falling.

[Brief description of the drawings]

FIG. 1 is a schematic perspective explanatory view showing a hatch plate for a snow throwing port such as a snowfall groove according to an embodiment of the present invention, in which a hatch plate is erected and a hatch opening is opened.

FIG. 2 is a schematic longitudinal sectional view of the hatch structure for a snow throwing port such as a snowfall groove according to the embodiment of the present invention in a state where a hatch plate is turned down to close a hatch opening.

FIG. 3 is a schematic plan view of a hatch structure for a snow throwing port such as a snowfall groove according to an embodiment of the present invention in a state where the hatch plate is folded down.

FIG. 4 is an explanatory schematic plan view taken along the line AA of FIG. 2;

FIG. 5 is a schematic vertical sectional view taken along the line BB in FIG. 3;

FIG. 6 is a schematic side view of the embodiment of the hatch structure for a snow throwing port such as a snowfall groove according to the present invention, around a mounting portion of a bell crank-shaped hook provided below an end of a hatch plate.

FIG. 7 is a schematic side view of an operation rod for opening and closing a hatch plate in an embodiment of a hatch structure for a snow throwing port such as a snowfall groove according to the present invention.

FIG. 8 is a schematic plan view of an embodiment in which countless rainwater slits are provided on a hatch plate of a hatch structure for a snow throwing port such as a snowfall groove according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Road surface 2 ... Snow throw area 3 ... Snow drift 5 ... Snow throw 6 ... Snow throw frame 7 ... Frame plate 7B ... Recess 8 ... Positioning plate 10 ... Snow throw Hatch 10A Opening 11 Hatch frame 12 Hatch frame 13 Hatch receiving plate 13A Lock pin 13B Nylon resin plate 15 Hatch plate 15A Notch 15B Operation hole 15C ... Pattern of hatch plate 15 16... Nylon resin plate 17... Bell crank-shaped hook 17 A... Base 17 B... Hook 18. 1 gear 22 ... balance weight shaft 23 ... second gear 24 ... arm 25 ... balance weight 30 ... screen 32 ... operation rod 33 ... locking part 34 ... holding part 35 ... Hatch plate 35A Notch 35B ... rainwater slit 35Bb ...... rainwater slit (bell crank-shaped hooks 1
7C) 35C: pattern of hatch plate 15 35D: pattern of hatch plate 15 35E: pattern of hatch plate 15 θ: maximum standing angle

Claims (4)

(57) [Claims] 1. A rectangular hatch frame 11 having substantially the same shape as the frame 6 is provided on a rectangular frame 6 at the top of a snow throwing port 5 installed in a snow throwing area 2 on a snow flow groove 3, a snow melting tank, or the like. Is attached to the hatch frame 11, and the lower part of one side of the hatch plates 15 and 35 is
A hatch support plate 13 is provided on the other side of the hatch frame 11 to support the lower end of the hatch plates 15 and 35, and the hatch shaft 20 is provided below the hatch shaft 20. In parallel with this, a balance weight shaft 22 interlocking with the hatch shaft 20 is provided, and the base of the arm 24 with the balance weight 25 is closed on the balance weight shaft 22, and the hatch plates 15, 35 close the hatch opening 10A. In this case, the arm 24 comes close to the hatch plates 15, 35, and when the hatch plates 15, 35 stand up to open the opening 10A, the arm 24 hangs substantially vertically. Hatch structure for snow throwing holes such as snow drifts, characterized by being mounted as described above. 2. A rectangular recess 7B is formed on the inside by connecting four L-shaped frame plates 7 to the top of a snow throwing port 5 installed in a snow throwing area 2 above a snow flow groove 3, a snow melting tank, or the like. The hatch frame 11 is provided on one side of a substantially rectangular hatch frame 11 which is housed in the recess 7B of the snowfall port frame 6.
A lower portion of one side of the hatch plates 15, 35 having substantially the same shape as the inside of the hatch plate is swingably mounted via a hatch shaft 20, and a lower end of the hatch plates 15, 35 is supported on the other side of the hatch frame 11. Are provided at appropriate intervals, and the hatch shaft 2 is provided below the hatch shaft 20.
A balance weight shaft 22 with a second gear 23 meshing with the first gear 21 on the hatch shaft 20 is provided in parallel with the shaft weight 0, and a base of an arm 24 having a balance weight 25 at the end of the balance weight shaft 22. The hatch plate 1
When the hatches 5 and 35 close the hatch opening 10A, the arm 24 is close to and substantially parallel to the hatch plates 15 and 35, and the hatch plates 15 and 35 stand up to close the hatch opening 10A. A hatch structure for a snow throwing port such as a snow drift, wherein the arm 24 is mounted so as to hang down substantially vertically when opened. 3. A stop pin 13A is provided on any one of the hatch receiving plate 13 and the plurality of hatch receiving plates 13, 13,..., And the hatch plate 15, In a state where the hatch opening 10A is closed by 35, a bell crank-shaped hook 17 that engages with the stop pin 13A is pivotally mounted on a shaft 18, and the bell crank-shaped hook 17 is , 35
The snow throwing device according to claim 1 or 2, wherein when the hatch opening (10A) is closed, an automatic engagement with the locking pin (13A) is ensured. Mouth hatch structure. 4. When the hatch opening 10A is closed by the hatch plates 15, 35, the hatch plates 15, 35 are closed.
A stopper 19 for preventing the hook portion 17B of the bell crank-shaped hook 17 attached to the shaft 18 below the end of the hatch plate 15A from excessively retracting from the locking pin 13A is provided with the hatch plates 15,3.
The hatch structure for a snow throwing hole such as a snow drift according to claim 3, wherein the hatch structure is provided below the end of the fifth hole.