Transmitter protection device

Abstract

The present invention provides a transmitter protection device that ensures the operability of the transmitter while preventing malfunctions caused by unintended pressure on the transmitter by snow accumulation or other objects resulting from the passage of snowplows, and an emergency notification device equipped with the said protection device. [Solution] The snow accumulation protection device 30, which is a protective device for the transmitter 18, comprises a cover base 32 installed around the exposed part of the transmitter 18 on the door surface 17 which is the mounting surface, and a snow accumulation protection cover 34 which is attached to the cover base 32 so as to be openable and closable and covers the exposed part of the transmitter 18 including the operating part 1810 when closed. The snow accumulation protection cover 34 is attached to the cover base 32 at an angle such that when closed, the lower side is positioned closer to the door surface 17 than the upper side.

Description

Technical Field

[0001] The present invention relates to a protection device for a transmitter that prevents malfunctions caused by unintended pressing of the transmitter.

Background Art

[0002] Conventionally, tunnels on expressways, automobile-only roads and the like are ranked according to the accident occurrence rate that correlates with the tunnel length and assumed traffic volume in accordance with the provisions of the Road Act and the like, and depending on the rank, it is obligatory to install devices and equipment such as emergency notification devices, fire extinguisher boxes, fire hydrant devices, water spray devices, and fire detectors as emergency facilities.

[0003] Among these, in tunnels of a rank where installation of emergency notification devices and fire extinguisher boxes is mandatory, there are some in which the emergency notification device is installed integrally with the fire extinguisher box as emergency equipment. In addition, the fire extinguisher box stores, for example, two fire extinguishers in a fire extinguisher storage section provided with a fire extinguisher door, and the emergency notification device is, for example, provided with a red indicator light, a transmitter, a response lamp, and a telephone jack on a notification device door arranged above the fire extinguisher storage section of the fire extinguisher box.

[0004] The red indicator light is constantly lit, so that the installation locations of the fire extinguisher box and the emergency notification device can be confirmed from a distance. For example, when a fire breaks out and the transmitter is pressed to turn on the push button switch, a fire notification signal is transmitted from the emergency notification device to the disaster prevention reception panel installed in the electrical room, and a fire alarm is output from the disaster prevention reception panel. The disaster prevention reception panel that has output the fire alarm transmits a response signal to the emergency notification device, and on the emergency notification device side, the red indicator light blinks and the response lamp lights up, making it possible to confirm that the fire notification signal has been received on the disaster prevention reception panel side.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

[0006] Incidentally, in tunnels located in snowy regions, snowplows are dispatched to clear the snow when snowfall continues, maintaining road traffic. In such snow removal operations, when a snowplow enters a tunnel while clearing snow from the road, the cleared snow is scattered from the road shoulder to the tunnel wall up to a point where the snowplow has advanced from the tunnel entrance, causing snow to accumulate.

[0007] When snow accumulates on the road shoulder and tunnel walls due to the passage of snowplows, the transmitter on the emergency alarm system installed at the tunnel entrance is pushed by the snow, causing it to malfunction and resulting in false alarms being output from the disaster prevention receiver panel. This sporadically creates a problem where dealing with these false alarms is time-consuming and requires considerable effort.

[0008] The present invention aims to provide a transmitter protection device that ensures the operability of the transmitter while preventing malfunction of the transmitter due to unintended pressure on the transmitter caused by snow accumulation or other factors resulting from the passage of snowplows. [Means for solving the problem]

[0009] (Transmitter protection device) The present invention is a transmitter protection device that prevents the transmitter from malfunctioning due to unintended pressing, A cover base installed around the exposed part of the transmitter on the mounting surface of the transmitter, A protective cover that is mounted on a cover base so as to be openable and closable, and which covers at least the operating part of the transmitter's exposed parts when closed, Equipped with, The protective cover is characterized in that, at least in the closed state when the protective device is installed, the lower side is positioned closer to the mounting surface than the upper side.

[0010] (Installation structure of the cover base) A through hole is provided from the mounting surface toward the surface opposite the mounting surface, corresponding to the position where the cover base of the mounting surface is installed. On the mounting surface side of the cover base in its installed state, a fixing receiver is provided corresponding to the position of the through hole. The cover base is fixed to the mounting surface by a fixing member inserted into the fixing receiver located on the mounting surface side through a through hole from the side facing the mounting surface.

[0011] (Structure of the protective cover) When the protective cover is closed, at least a portion of the transmitter is visible from the outside.

[0012] (Structure of the cover base) The cover base has an opening that allows access from the outside to the protective cover and / or the interior covered by the protective cover when the protective cover is closed.

[0013] (Emergency notification device) Furthermore, the present invention is an emergency notification device characterized in that a transmitter is mounted exposed on one surface, and the aforementioned transmitter protection device is installed on that surface, with the mounting surface being the same surface. [Effects of the Invention]

[0014] (Basic effects) The present invention provides a transmitter protection device for preventing malfunction of a transmitter due to unintended pressing, comprising: a cover base installed on the mounting surface of the transmitter around the exposed part of the transmitter; and a protective cover that is openably and closably attached to the cover base and covers at least the operating part of the exposed part of the transmitter when closed. The protective cover is attached to the cover base at an angle such that, at least when the protective device is installed and in the closed state, the lower side is positioned closer to the mounting surface than the upper side. As a result, the operating part of the transmitter is covered by the protective cover, which prevents unintended pressing on the transmitter by snow accumulation caused by the passage of snowplows, and reliably prevents malfunction of the operating part.

[0015] Furthermore, the protective cover is attached to the cover base in an inclined manner such that at least in the closed state when the protective device is installed, the lower side is positioned closer to the mounting surface side than the upper side. Therefore, even if snow scattered by the passage of a snowplow adheres to the protective cover, it easily falls off the protective cover, making it possible to suppress and prevent snow accumulation on the protective cover.

[0016] (Effects of the cover base installation structure) Furthermore, corresponding to the position where the cover base is installed on the mounting surface, a through hole is provided penetrating from the mounting surface to the surface opposite to the mounting surface. A fixing receiving portion is provided on the mounting surface side when the cover base is installed, corresponding to the position of the through hole. The cover base is fixedly installed on the mounting surface by a fixing member that is inserted from the surface side opposite to the mounting surface through the through hole into the fixing receiving portion located on the mounting surface side. As a result, the fixing member is not exposed to the outside, and even when a metal screw, for example, is used as the fixing member, it is possible to prevent corrosion of the fixing member caused by accumulated snow containing snow-melting agents such as sodium chloride, and ensure the durability of the protective device.

[0017] (Effects of the protective cover structure) Furthermore, in the closed state, at least a part of the transmitter is visible from the outside through the protective cover, so that even for a transmitter equipped with a protective cover, the location of the transmitter can be easily recognized.

[0018] (Effects of the cover base structure) Furthermore, the cover base has an open portion that allows access from the outside to the protective cover and / or the inside covered by the protective cover when the protective cover is in the closed state. Therefore, even when it is difficult to perform the opening operation of the protective cover due to a state such as snow accumulated on the protective cover, it is possible to access and open the protective cover via the open portion of the cover base, or operate the transmitter without opening the protective cover, enabling reliable operation of the transmitter regardless of the situation. [Brief Description of the Drawings]

[0019] [Figure 1]This is an explanatory diagram showing a fire extinguisher box integrally provided with an emergency alarm device. [Figure 2] This is an explanatory diagram showing the installation state of the fire extinguisher box of Figure 1 as viewed from the cross section of a tunnel. [Figure 3] This is an explanatory diagram showing a snow accumulation protection device for a transmitter taken out and displayed. [Figure 4] This is an explanatory diagram showing the closed state of the snow accumulation protection cover and the opening operation of the snow accumulation protection cover. [Figure 5] This is an explanatory diagram showing the cover base taken out and displayed. [Figure 6] This is an explanatory diagram showing the snow accumulation protection cover taken out and displayed. [Figure 7] This is an explanatory diagram showing the fixing structure of the cover base in an assembled and disassembled state. [Figure 8] This is an explanatory diagram showing the snow accumulation protection device with the lower side open from the operation part of the transmitter. [Figure 9] This is an explanatory diagram showing the closed state of the snow accumulation protection cover of the snow accumulation protection device in Figure 7 and the opening operation of the snow accumulation protection cover. [Figure 10] This is an explanatory diagram showing a snow accumulation protection device provided with a cover base in which an open part is formed. [Figure 11] This is an explanatory diagram showing a snow accumulation protection device provided with a snow accumulation protection cover that opens and closes by sliding. [Figure 12] This is an explanatory diagram showing the sliding opening and closing operation of the snow accumulation protection cover. [Modes for Carrying Out the Invention]

[0020] In the following, embodiments of the transmitter protection device and the emergency alarm device provided with the protection device according to the present invention will be described based on the drawings. It should be noted that the present invention is not limited by the following embodiments.

[0021] [Basic Concept of Embodiment] First, the basic concept of the embodiment will be explained. The embodiment generally relates to a transmitter protection device that prevents the transmitter from malfunctioning due to unintended pressing, and more specifically to a snow accumulation protection device that prevents the transmitter, which is mounted exposed on an emergency communication device in a tunnel, from malfunctioning due to snow accumulation caused by the passage of a snowplow.

[0022] Here, "emergency notification device" refers to a type of emergency equipment installed in tunnels on expressways and other roads that are designated as fire-fighting areas. For example, it may be an electrical device such as a red indicator light or transmitter installed on an electrically operated door. A "transmitter" is a device that, in the event of a fire, allows road users to operate a control panel to send a notification signal, which then triggers a fire alarm.

[0023] Furthermore, the transmitter protection device in the present invention comprises a cover base and a protective cover. Here, the "cover base" is a base installed on the mounting surface of the transmitter around the exposed part of the transmitter, and the "protective cover" is a cover that is attached to the cover base so as to be openable and closable, and in the closed state, covers at least the operating part of the exposed part of the transmitter, and is characterized in that it is attached to the cover base at an inclination such that, at least in the closed state when the protective device is installed, the lower side is located closer to the mounting surface than the upper side.

[0024] Furthermore, while the "cover base" and "protective cover" can be manufactured from any material, if the purpose is to prevent malfunctions caused by snow accumulation due to the passage of snowplows, it is preferable to use resin rather than metal, as the snow scattered by the passage of snowplows contains de-icing agents such as sodium chloride, which may cause corrosion.

[0025] Furthermore, the protective cover is mounted to the cover base at an angle, but the angle of inclination can be any angle that makes it easier for any liquid or solid adhering to the protective cover to fall off, for example, an angle of inclination of 5° to 20°.

[0026] Furthermore, the "cover base installation structure" includes a through hole provided from the mounting surface toward the surface opposite the mounting surface, corresponding to the position where the cover base is installed on the mounting surface; a fixing receiver provided on the mounting surface side of the cover base in the installed state, corresponding to the position of the through hole; and a fixing member that fixes the cover base to the mounting surface by being inserted from the surface opposite the mounting surface through the through hole toward the fixing receiver located on the mounting surface side.

[0027] Furthermore, the "protective cover" is such that, when closed, at least a portion of the transmitter is visible from the outside. Here, "at least a portion of the transmitter is visible from the outside when closed" includes cases where the protective cover is made of a transparent material and is visible through the protective cover, and cases where a portion of the exposed part is not covered by the protective cover and the uncovered portion is visible without the protective cover.

[0028] Furthermore, the "cover base" has an opening that allows access to the protective cover and / or the interior covered by the protective cover from the outside when the protective cover is closed. Here, the structure and position of the "opening" can be any structure and position according to the purpose. For example, if the purpose is to allow access to the protective cover, the position of the opening is on the lower side of the cover base when the protective device is installed, and the structure includes an opening or an open step. Also, for example, if the purpose is to allow access to the operating part of the transmitter, the position of the opening corresponds to the position of the operating part, and the structure includes an opening.

[0029] The following describes a specific embodiment. In the specific embodiment shown below, the "protective device" is a "snow accumulation protection device for a transmitter attached to an emergency notification device installed integrally with a fire extinguisher box, for the purpose of preventing malfunction due to snow accumulation caused by the passage of a snowplow," the "cover base" is a "cover base made of transparent resin," the "protective cover" is a "snow accumulation protection cover made of transparent resin," the "fixing member" is a "metal screw," and the "fixing receiver" is a "fixing receiver with a screw hole formed therein." The specific details will be explained for this case.

[0030] [Specific details of the embodiment] The specific details of the embodiment will be explained as follows: a. Fire extinguisher box with integrated emergency alarm system b. Structure of snow accumulation protection device b1. Cover base b2. Snow accumulation protection cover b3. Fixing structure of the cover base b4. Structure and opening / closing function of snow accumulation protection device c. Snow accumulation protection device with the lower part of the transmitter's operating section exposed from the snow accumulation protection cover. d. Snow accumulation protection device equipped with a cover base having an open section. e. Snow protection device with a sliding snow protection cover. f. Modified versions of the present invention

[0031] [a. Fire extinguisher box with integrated emergency alarm system] First, we will explain the emergency notification device that is installed together with the fire extinguisher box. For this explanation, please refer to Figure 1, which shows the fire extinguisher box with the emergency notification device installed together, and Figure 2, which shows the installation state of the fire extinguisher box as viewed from a cross-section of the tunnel.

[0032] In the explanation of Figures 1 and 2, the X, Y, and Z directions are mutually orthogonal. Specifically, looking at the front of the emergency alarm device, which is the side where the transmitter is exposed, the X direction is the left-right direction, the Y direction is the up-down direction, and the Z direction is the front-back direction. Furthermore, in the X direction, the +X side is the right side and the -X side is the left side; in the Y direction, the +Y side is the upper side and the -Y side is the lower side; and in the Z direction, the +Z side is the front side and the -Z side is the rear side. This is the same for the X, Y, and Z directions in Figures 3 to 12.

[0033] As shown in Figure 1, the fire extinguisher box 10, a type of device installed as emergency equipment in tunnels, stores, for example, two fire extinguishers in the fire extinguisher storage section at the bottom of the housing, and a fire extinguisher door 12 is provided at the front opening that can be opened and closed by a hinge 14. Road users can unlock the fire extinguisher door 12 by operating the handle 13, open the fire extinguisher door 12, take out the fire extinguishers stored inside the housing, and carry out firefighting activities.

[0034] An emergency notification device 16, a type of device / equipment installed as tunnel emergency equipment, is provided on the upper side of the fire extinguisher box 10. The emergency notification device 16 has an electrical door on its front opening, and on one side of the door surface 17, electrical equipment such as a transmitter 18, a red indicator light 20, a response lamp 22, and a telephone jack 24 are provided, and a nameplate 21 is provided on the upper side of the door surface 17.

[0035] The transmitter 18 is mounted exposed to the front of the door surface 17, and a push-button switch is provided on the operating unit 1810. The red indicator light 20 is always lit, allowing the locations of the fire extinguisher box 10 and the emergency notification device 16 to be confirmed from a distance. For example, in the event of a fire, when a road user presses the operating unit 1810 of the transmitter 18 to turn on the push-button switch, a fire notification signal is sent from the emergency notification device 16 to the disaster prevention receiving panel installed in the electrical room, etc., and a fire alarm is output from the disaster prevention receiving panel. The disaster prevention receiving panel that has outputted the fire alarm sends a response signal to the emergency notification device 16, and the red indicator light 20 flashes and the response lamp 22 lights up on the emergency notification device 16 side, allowing the disaster prevention receiving panel to confirm that the fire notification signal has been received.

[0036] A snow accumulation protection device 30 is fixedly installed to a transmitter 18 that is mounted exposed to the front of the door surface 17. The snow accumulation protection device 30 comprises a cover base 32 and a snow accumulation protection cover 34.

[0037] The cover base 32 is positioned around the exposed portion of the transmitter 18, which is mounted exposed to the front of the door surface 17, and is fixedly installed on the door surface 17. The snow accumulation protection cover 34 is attached to the cover base 32 so as to be able to open and close around its upper end as an axis, and in the normal state it is in a closed position that covers the front of the transmitter 18, including the operating part 1810.

[0038] As shown in Figure 2, the fire extinguisher box 10 is installed in a cutout 29 constructed in the tunnel wall 27 from the shoulder passage (monitoring staff passage) 26 along the road 25 inside the tunnel. Therefore, when a snowplow passes through the tunnel while clearing snow, snow accumulation 28 occurs near the fire extinguisher box 10, which is located close to the tunnel entrance and near the lane in which the snowplow passes.

[0039] As described above, the accumulation of snow 28 on the fire extinguisher box 10 due to the passage of snowplows will affect the transmitter 18 of the emergency notification device 16 located above the fire extinguisher box 10 as the amount of snow increases. However, in this embodiment, since a snow accumulation protection device 30 is installed on the transmitter 18, the pressure from the snow accumulation 28 is absorbed by the snow accumulation protection device 30, and the operating part 1810 of the transmitter 18 is not pressed, thus reliably preventing malfunction of the transmitter 18 due to the snow accumulation 28.

[0040] Furthermore, when a road user operates the transmitter 18, as shown in Figure 2, they open the snow protection cover 34 of the snow protection measure 30 upwards and push in the operating part 1810. Since opening the snow protection cover 34 enables the operation of the transmitter 18, even when the snow protection device 30 is installed, the operation of the transmitter 18 is simple and easy, and the operability of the transmitter 18 is ensured regardless of the presence or absence of snow accumulation 28.

[0041] [b. Structure of snow accumulation protection device] Next, the structure of the snow accumulation protection device will be described. In this description, please refer to Figure 3, which shows the snow accumulation protection device of the transmitter removed, and Figure 4, which shows the closed state of the snow accumulation protection cover and the operation of opening the snow accumulation protection cover. Figure 3(A) shows the front view, and Figure 3(B) shows the cross-section at the cutting line aa in Figure 3(A). Also, Figure 4(A) shows the closed state of the snow accumulation protection cover, and Figure 4(A) shows the state in which the snow accumulation protection cover has begun to open.

[0042] As shown in Figure 3, the snow accumulation protection device 30 comprises a cover base 32 and a snow accumulation protection cover 34. First, we will describe the cover base 32 and the snow accumulation protection cover 34 individually.

[0043] (b1. Cover base) The cover base of the snow accumulation protection device will be described below. For this description, please refer to Figure 5, which shows the cover base removed from the device. Figure 5(A) shows a partial cross-section of the front view, Figure 5(B) shows the cross-section at the cutting line cc in Figure 5(A), and Figure 5(C) shows the top view.

[0044] As shown in Figure 5, the cover base 32 is made of, for example, transparent resin and has a base flat portion 3220 of sufficient size to accommodate the exposed portion of the transmitter 18 that is exposed to the front from the door surface 17, and an opening hole 3230 is formed in the base flat portion 3220 for inserting the exposed portion of the transmitter 18.

[0045] Base wall sections 3210 are erected on both the left and right sides of the base flat section 3220, facing forward. An open shaft hole 3240 is formed on the upper inner side of the left and right base wall sections 3210. The shaft hole 3240 is closed on the outside, but it may also be open on the outside to function as a through hole. Furthermore, a spherical recess, an engaging recess 3250, is formed on the inner side near the center in the vertical direction of the left and right base wall sections 3210.

[0046] Block-shaped fixing receivers 3260 are formed at four corners of the base flat portion 3220 that are on the inside of the base wall portion 3210. Screw holes 3270 are formed on the back (rear) side of each fixing receiver 3260, and the screw holes 3270 are closed on the front side of the fixing receiver 3260. The reference numerals for each part of the base cover 32 are also shown in Figures 3 and 4.

[0047] (b2. Snow accumulation protection cover) Next, we will explain the snow protection cover of the snow accumulation protection device. For this explanation, please refer to Figure 6, which shows the snow protection cover removed from the device. Figure 6(A) shows the front view, and Figure 6(B) shows the side view (left side).

[0048] As shown in Figure 6, the snow accumulation protection cover 34 is made of, for example, transparent resin and has a cover surface portion 3410 that corresponds to the base surface portion 3220 of the cover base 32 shown in Figure 5, with a rearward-folded upper surface portion 3412 formed at the upper end of the cover surface portion 3410. Shaft portions 3420 are formed on both the left and right sides of the upper part of the cover surface portion 3410. The shaft portions 3420 are fitted into the shaft holes 3240 of the cover base 32 shown in Figure 5, and pivotally support the snow accumulation protection cover 34 on the cover base 32 so that it can be opened and closed.

[0049] As shown in Figure 6(B), the flat surface 3410 of the snow accumulation protection cover 34 is tilted backward at a predetermined angle θ such that when it is pivotally supported on the cover base 32 of Figure 5 so as to be openable and closable, the lower side is closer to the base flat surface 3220 of the cover base 32 than the upper side. The angle θ of the flat surface 3410 is arbitrary as long as it allows snow that hits from the outside (front) to fall off without adhering to the outer surface (front) of the flat surface 3410, but for example, it is set to an angle of about 10°.

[0050] Furthermore, spherical projections called engaging protrusions 3430 are formed near the center in the vertical direction on both the left and right sides of the cover's flat surface 3410. When the snow accumulation protection cover 34 is pivotally supported on the cover base 32 in Figure 5 so as to be openable and closable, the engaging protrusions 3430 engage with the engaging recesses 3250 of the cover base 32, and when the snow accumulation protection device 30 is in the closed state, the cover's flat surface 3410 is held in an inclined state with an inclination angle θ. The reference numerals for each part of the snow accumulation protection cover 34 are also shown in Figures 3 and 4.

[0051] (b3. Fixing structure of the cover base) Next, we will describe the fixing structure for securing the cover base of the snow accumulation protection device to the door surface of the emergency notification device. In this description, please refer to Figure 7, which shows the door surface, cover base, and fixing structure in their assembled and disassembled states. Figure 7 shows the cross-section along the cutting line dd in Figure 3(A).

[0052] As shown in Figure 7, in order to fix the cover base 32 of the snow accumulation protection device 30 to the door surface 17 of the emergency notification device 16, a through hole 37 is formed in the door surface 17 corresponding to a screw hole 3270 formed on the back side (rear side) of the fixing receiving portion 3260 of the cover base 32. Therefore, the cover base 32 is fixed to the door surface 17 by inserting a metal screw 36 from the back side (rear side) of the door surface 17 through the through hole 37 and screwing the screw 36 into the screw hole 3270.

[0053] In this fixing structure of the cover base 32, the screw 36, which is inserted through the through hole 37 and screwed into the screw hole 3270 of the cover base 32 from the back side (rear side) of the door surface 17, is not exposed on the front side of the snow accumulation protection device 30 that receives snow accumulation. Therefore, even if the screw 36 is made of metal, it will not come into contact with the de-icing agent contained in the snow and corrode, thus ensuring high durability for the snow accumulation protection device 30.

[0054] (b4. Structure and opening / closing function of snow accumulation protection device) Next, we will explain the structure of the snow accumulation protection device, along with its opening and closing function. Please refer to Figures 3 and 4 for this explanation.

[0055] As shown in Figure 3, the snow accumulation protection device 30 comprises a cover base 32 shown in Figure 5 and a snow accumulation protection cover 34 shown in Figure 6, and is fixedly installed on the door surface 17 of the emergency notification device 16 by the fixing structure shown in Figure 7.

[0056] Furthermore, the snow accumulation protection device 30 is attached to the cover base 32 so that the snow accumulation protection cover 34 can be opened and closed vertically around the shaft portion 3420 as the central axis, by fitting the shaft portions 3420 formed on the left and right sides of the upper part of the snow accumulation protection cover 34 into the shaft holes 3240 on the upper inner part of the base wall portions 3210 which are erected on both the left and right sides of the cover base 32.

[0057] Furthermore, in its closed state, the snow accumulation protection cover 34 has spherical engaging protrusions 3430 formed near the center in the vertical direction on both the left and right sides, which engage with spherical engaging recesses 3250 on the cover base 32 side. As shown in Figure 4(A), the lower side of the cover surface 3410 of the snow accumulation protection cover 34 is tilted to the rear at an inclination angle θ.

[0058] The snow accumulation protection device 30 configured in this way is installed, for example, in a tunnel in a snowy area, targeting one or two existing fire extinguisher boxes 10 near the tunnel entrance where the effects of snow accumulation due to snowplow passage through the tunnel are expected, and is installed on the transmitter 18 of the emergency notification device 16 for those boxes.

[0059] The snow accumulation protection device 30 is installed by opening the electrical door of the emergency notification device 16, which is integrated with the existing fire extinguisher box 10, and drilling a through hole 37 from the back side (rear side) opposite the door surface 17 of the electrical door, as shown in Figure 7. A screw 36 is then inserted through the through hole 37 from the back side (rear side), and the screw 36 is screwed into the screw hole 3270 of the base base 32, which is positioned on the door surface 17 side (front side) with the exposed part of the transmitter 18 inserted through the opening hole 3230, thereby fixing the snow accumulation protection device 30 in a position that covers the exposed part of the transmitter 18. Of course, if the target is a newly installed fire extinguisher box, the snow accumulation protection device 30 is installed during the manufacturing stage.

[0060] The snow accumulation protection device 30, which has been fixedly installed on the door surface 17 of the emergency notification device 16, covers the front side, including the operating section 1810 of the transmitter 18 that is exposed to the front side from the door surface 17 of the emergency notification device 16, as shown in Figure 3, when the snow accumulation protection cover 34 is closed. Snow scattered as the snowplow passes through the tunnel is caught by the snow accumulation protection cover 34, and malfunctions caused by the operating section 1810 of the transmitter 18 being pressed by snow are reliably prevented.

[0061] Furthermore, as shown in Figure 4(A), the snow accumulation protection device 30, when the snow accumulation protection cover 34 is closed, holds the lower side of the cover's flat surface 3410 tilted backward at a predetermined angle θ by the engagement of the engaging projection 3430 and the engaging recess 3250. This allows snow scattered by a snowplow passing through a tunnel to fall off the cover's flat surface 3410 without remaining on its outer surface (front).

[0062] Furthermore, when a road user operates the transmitter 18, they can easily and simply operate the transmitter 18's operating unit 1810 by placing their hand on the lower end of the flat surface 3410 of the snow accumulation protection cover 34, which is in the closed state as shown in Figure 4(A), and opening the snow accumulation protection cover 34 upwards as shown in Figure 4(B).

[0063] [c. Snow accumulation protection device with the lower part of the transmitter's control panel exposed from the snow accumulation protection cover] Next, as another embodiment of the snow accumulation protection device, a snow accumulation protection device in which the area below the transmitter's operating section is exposed from the snow accumulation protection cover will be described. In this description, refer to Figure 8, which shows the snow accumulation protection device with the area below the transmitter's operating section open, and Figure 9, which shows the closed state of the snow accumulation protection cover of the snow accumulation protection device of Figure 8 and the operation of opening the snow accumulation protection cover. Figure 9(A) shows the closed state of the snow accumulation protection cover, and Figure 9(B) shows the state in which the snow accumulation protection cover has begun to open.

[0064] As shown in Figures 8 and 9, the snow protection cover 34 of the snow protection device 30 in this embodiment has a shorter height (vertical length) of the cover surface 3410 compared to the embodiment shown in Figures 3 and 4, so that the lower end 3440 of the cover surface 3410 is located higher. As a result, when the snow protection cover 34 is closed, a portion below the operating section 1810 of the transmitter 18, which is exposed on the front of the door surface 17, is open to the outside. Therefore, even with the snow protection cover 34 in place, it is possible to easily and simply operate the operating section 1810 of the transmitter 18 by reaching in through the open area below the cover surface 3410 or by opening the snow protection cover 34.

[0065] Furthermore, because there is an open area on the lower side of the cover's flat surface 3410, there is a possibility that snow scattered by the snowplow passing through the tunnel may adhere to the transmitter 18. However, since the front of the transmitter's operating section 1810 is protected by the cover's flat surface 3410 of the snow accumulation protection cover 34, malfunctions caused by snow pressing on the operating section 1810 of the transmitter 18 can be prevented. In addition, because the lower side of the cover's flat surface 3410 is held at a predetermined angle θ towards the rear, it is difficult for snow to enter the interior of the snow accumulation protection cover 34 from the open area on the lower side of the cover's flat surface 3410.

[0066] Furthermore, if the snow accumulation protection cover 34 is opaque, in the embodiments shown in Figures 3 and 4, it is difficult to see the transmitter 18 from the outside when the cover of the snow accumulation protection device 30 is closed. However, in this embodiment, even when the snow accumulation protection cover 34 is closed, the transmitter 18 can be seen from the open area below the flat surface portion 3410 of the cover, making it possible for road users to easily recognize the location of the transmitter 18.

[0067] Furthermore, in the closed state of the snow accumulation protection cover 34, the configuration of the snow accumulation protection cover 34 that exposes the area below the operating section 1810 of the transmitter 18 may be modified in addition to shortening the height (vertical length) of the cover's flat surface 3410, by forming notches or openings of any shape, such as rectangles, semicircles, or triangles, on the lower side of the snow accumulation protection cover 34.

[0068] [d. Snow accumulation protection device equipped with a cover base with an open section] Next, as another embodiment of the snow accumulation protection device, a snow accumulation protection device equipped with a cover base having an open portion will be described. In this description, refer to Figure 10, which shows a snow accumulation protection device equipped with a cover base having an open portion.

[0069] The snow accumulation protection device 30 of this embodiment has an opening formed in the cover base 32. The structure and purpose of the opening are arbitrary, but for example, as shown in Figure 10(A), a rectangular opening 3280 is formed below the base wall portions 3210 that stand upright on both the left and right sides of the cover base 32, making it easy to open the snow accumulation protection cover 34. Therefore, even if a part of the lower side of the snow accumulation protection device 30 is buried by snow to the extent that the opening 3280 is not completely buried, making it difficult to open the snow accumulation protection cover 34 from the front of the snow accumulation protection device 30, road users can still access the snow accumulation protection cover 34 through the opening 3280 in the cover base 32 and open it, making it possible to operate the transmitter 18 more reliably even when there is a large amount of snow.

[0070] Furthermore, in this embodiment, the snow accumulation protection device 30 may also be formed as an open step portion 3290 by cutting out a rectangular section below the base wall portion 3210 that stands upright on both the left and right sides of the cover base 32, as shown in Figure 10(B).

[0071] Alternatively, the opening may be formed at a position corresponding to the operating section 1810 of the transmitter 18 on the base wall portion 3210 that stands upright on both the left and right sides of the cover base 32. This makes it possible to reach in through the opening and directly operate the operating section 1810 of the transmitter 18, enabling operation of the transmitter 18 even when the snow accumulation protection cover 34 cannot be opened. In this case, the inclination angle θ of the cover flat portion 3410 is adjusted so that it is possible to reach in through the opening and operate the transmitter 18.

[0072] Alternatively, the base wall portion 3210 standing on the side into which the snowplow is entering may not have an opening, but an opening may be formed on the base wall portion 3210 standing on the opposite side. This prevents snow that is likely to be scattered from entering the snow protection device 30 from the side into which the snowplow is entering, and ensures high reliability of the snow protection device 30 even when a cover base 32 with an opening formed in the base wall portion 3210 is used.

[0073] [e. Snow storage protection device with a sliding snow storage protection cover] Next, as another embodiment of the snow accumulation protection device, a snow accumulation protection device equipped with a sliding snow accumulation protection cover will be described. In this description, refer to Figure 11, which shows the snow accumulation protection device equipped with a sliding snow accumulation protection cover, and Figure 12, which shows the sliding opening and closing operation of the snow accumulation protection cover. Figure 11(A) shows the side (left side), and Figure 11(B) shows the front. Figure 12(A) shows the snow accumulation protection cover in the closed state, and Figure 12(B) shows the snow accumulation protection cover in the open state.

[0074] As shown in Figure 11, in the snow accumulation protection device 30 of this embodiment, guide grooves 38 are formed in the base wall portions 3210 that stand upright on both the left and right sides of the cover base 32, and guide pins 40 provided on both the left and right sides of the lower part of the snow accumulation protection cover 34 are movably fitted into the guide grooves 38.

[0075] Furthermore, the guide groove 38 is formed with an inclination such that the lower side of its guide shaft 3810 is closer to the door surface 17 than the upper side. As a result, as shown in Figure 12(A), when the snow accumulation protection cover 34 is closed, the lower side is held inclined to the rear at an angle θ, so that even if snow scattered as the snowplow passes through the tunnel hits the front side of the snow accumulation protection cover 34, it will not adhere to it, and the snow will fall off without remaining on the front of the snow accumulation protection cover 34.

[0076] Furthermore, as shown in Figure 11(B), the upper parts of the base wall portions 3210 that are erected at both the left and right ends of the cover base 32 have protruding portions 3820 that extend toward the rear, and the snow accumulation protection cover 34 slides open and closed while in contact with the protruding portions 3820. As a result, the snow accumulation protection cover 34 is supported at two points, the guide pin 40 and the protruding portions 3820, and rotation around the guide pin 40 does not occur.

[0077] Furthermore, when a road user operates the transmitter 18, they can easily and simply operate it by placing their hand on the lower end of the snow accumulation protection cover 34, which is in the closed state as shown in Figure 12(A), and lifting it upwards, thereby opening the snow accumulation protection cover 34 by moving the guide pin 40 along the guide groove 38, as shown in Figure 12(B).

[0078] Furthermore, to close the opened snow accumulation protection cover 34, releasing your hand from the open snow accumulation protection cover 34 will cause the snow accumulation protection cover 34 to fall along the guide groove 28 due to its own weight, returning it to the closed state shown in Figure 12(A).

[0079] In Figures 11 and 12, the structure is such that the guide pin 40 can be seen from the guide groove 38. However, the structure of the guide groove 38 and guide pin 40 is arbitrary, and if the goal is to prevent snow flying in from the left and right directions from entering through the guide groove 38, the guide groove 38 can be closed to the outside rather than open to the outside.

[0080] [f. Variations of the present invention] Modified examples of the transmitter protection device according to the present invention will now be described. In addition to the embodiments described above, the transmitter protection device according to the present invention includes the following modifications.

[0081] The above embodiment uses an emergency notification device installed integrally with a fire extinguisher box as an example, but the same can be applied to emergency notification devices installed independently. Furthermore, the present invention also includes cases where a protective device is provided on the transmitter alone.

[0082] The above embodiment uses the example of snow accumulation caused by snowplow traffic as an instance of unintended pressure on the transmitter, but it is also possible to prevent unintended pressure on the transmitter due to other factors. For example, pressure applied to the transmitter by a person accidentally leaning on the emergency alarm device can also be received by the transmitter's protective device, preventing the transmitter from malfunctioning.

[0083] (others) Furthermore, the present invention is not limited to the embodiments described above, and includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values ​​shown in the embodiments described above. [Explanation of symbols]

[0084] 10: Fire extinguisher box 12: Fire extinguisher door 13: Handle 14: Hinge 16:Emergency notification device 17: Door surface 18: Transmitter 1810:Operation unit 20: Red indicator light 22: Response lamp 24: Phone Jacking 25: Road 26: Roadside passage 28: Snowfall 29: Hollowed-out section 30:Snow protection device 32: Cover base 3210: Base wall section 3220: Base plane part 3230: Open hole 3240: Shaft hole 3250: Engaging recess 3260: Fixed receiver 3270: Screw hole 3280: Opening 3290: Open step 34: Snow accumulation protection cover 3410: Cover flat surface 3412:Top part 3420: Shaft 3430: Engagement convex part 3440: Bottom edge 36: Screw 37: Through hole 38: Guide groove 3820: Overhang 40: Guide pin

Claims

1. A transmitter protection device that prevents the transmitter from malfunctioning due to unintended pressing, A cover base installed on the mounting surface of the transmitter, around the exposed portion of the transmitter, A protective cover is attached to the cover base so as to be openable and closable, and in the closed state, covers at least the operating part of the exposed portion of the transmitter. Equipped with, The cover base is, Axle holes located on the upper inner side of the left and right sides, A recess located below the aforementioned shaft hole, Equipped with, The aforementioned protective cover is A shaft portion is positioned on the upper outer side of the left and right sides, corresponding to the position of the aforementioned shaft hole, A protrusion located below the shaft portion, corresponding to the position of the recess, Equipped with, A transmitter protection device characterized in that, in the closed state when the protection device is installed, the protective cover is inclined such that the lower side of the protective cover is positioned closer to the mounting surface than the upper side, the shaft portion of the protective cover is inserted into the shaft hole of the cover base, and the recess of the cover base engages with the protrusion of the protective cover.

2. A transmitter protection device according to claim 1, A transmitter protection device characterized in that, in the open state when the protection device is installed, the engagement between the recess of the cover base and the protrusion of the protective cover is released, thereby allowing access to the transmitter.

3. A transmitter protection device that prevents the transmitter from malfunctioning due to unintended pressing, A cover base installed on the mounting surface of the transmitter, around the exposed portion of the transmitter, A protective cover is attached to the cover base so as to be openable and closable, and in the closed state, covers at least the operating part of the exposed portion of the transmitter. Equipped with, The cover base is, An overhang is formed at the top, extending toward the mounting surface, and the side of the protective cover abuts against it, Guide grooves are positioned from the top to the bottom of the left and right sides, Equipped with, The aforementioned protective cover is The guide pins are positioned on the lower outer sides of the left and right sides, corresponding to the position of the guide grooves. A transmitter protection device characterized in that, in the closed state when the protection device is installed, the protective cover is inclined such that the lower side of the protective cover is positioned closer to the mounting surface than the upper side, and the guide groove of the cover base and the guide pin of the protective cover are engaged.

4. A transmitter protection device according to claim 3, A transmitter protection device characterized in that, in the open state when the protection device is installed, the guide pin of the protective cover slides upward through the guide groove of the cover base, thereby providing access to the transmitter.

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