Transmitter

Abstract

To provide a transmitter for a tunnel which can improve work efficiency in an inspection while guaranteeing waterproofness.SOLUTION: A transmitter 1 for a tunnel mountably provided on a mounting plate, comprises: a push-movably provided transmission operation unit 2; holding means 3 for holding the transmission operation unit 2 to a push-moving state when the transmission operation unit 2 is pushed and moved; and cancellation means 4 connected with the holding means 3 to cancel holding of the push-moving state by the holding means 3. The cancellation means 4 has a cancellation operation unit 12, and the cancellation operation unit 12 is provided to be located on a rear surface side of the mounting plate when the transmitter 1 is mounted on the mounting plate.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a transmitter, and more specifically, to a transmitter for a tunnel.

Background Art

[0002] Conventionally, there is a transmitter for a tunnel for transmitting to a disaster prevention receiver or the like that a fire has occurred in the tunnel. The transmitter for a tunnel has a protection plate provided on the front side of a push button switch. During operation, the push button switch is pressed by breaking the protection plate, and the occurrence of a fire or the like can be transmitted to the disaster prevention receiver (see Patent Document 1). At this time, since the protection plate is broken, it cannot be reused.

[0003] On the other hand, the transmitter for a tunnel needs to be regularly inspected. At this time, it is necessary to actually press the push button switch to check whether it operates normally. Therefore, in the transmitter for a tunnel, during inspection, the protection plate is once removed from the transmitter, and after the inspection is completed, the protection plate is returned to its original state again.

[0004] On the other hand, in a transmitter for an automatic fire alarm facility (hereinafter abbreviated as an auto fire alarm) installed in a building, when the push button is pushed in, the push button switch portion inside is pushed and the push button engages with a restoration lever so that the state in which the push button is pushed is maintained. And by operating this restoration lever, the push button can be returned to its original state (see Patent Document 2). That is, in the transmitter for an auto fire alarm, it is not necessary to remove the protection plate during inspection.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

[0006] When inspecting tunnel transmitters, not only is it troublesome to remove the protective plates, but if the removed protective plates are accidentally dropped into the tunnel, retrieval is difficult and could lead to an accident. Due to the unique circumstances of tunnels, the protective plates must be handled with the utmost care, and this removal of protective plates was a factor that reduced the efficiency of inspection work for tunnel transmitters.

[0007] Therefore, tunnel alarm transmitters are required to have a structure that does not require the removal of protective plates during inspection. At first glance, it might seem that this problem could be solved by adopting the same structure as fire alarm transmitters for tunnel alarm transmitters, but for the reasons described below, it is difficult to adopt the same structure as fire alarm transmitters.

[0008] Tunnel alarm transmitters require high water resistance, such as IPX5 equivalent, because they may be exposed to high-pressure water during mechanical cleaning inside tunnels. On the other hand, fire alarm transmitters must have an opening on the front side to operate the reset lever. Although this opening is normally covered with a window door, the window door is not waterproof against high-pressure water discharge and allows water to enter through the opening. Therefore, there are concerns that adopting the same structure as fire alarm transmitters for tunnel transmitters would reduce their water resistance.

[0009] Therefore, the objective of the present invention is to provide a tunnel transmitter that ensures waterproofness while improving work efficiency during inspections. [Means for solving the problem]

[0010] The present invention relates to a tunnel transmitter that is mountable on a mounting plate, comprising: a pushable transmitter operation unit; a holding means for holding the transmitter operation unit in a pushed state when the transmitter operation unit is pushed; and a release means connected to the holding means for releasing the hold of the transmitter in the pushed state, wherein the release means has a release operation unit, and the release operation unit is positioned on the back side of the mounting plate when the transmitter is mounted on the mounting plate.

[0011] Furthermore, in the present invention, the release operation unit can be provided so as to be located on the side of the transmission operation unit when the transmitter is attached to the mounting plate. In addition, in the present invention, the release means can be provided so as to be rotatable together with the holding means, the holding means has a hooking portion and a biasing means that biases the hooking portion, the transmission operation unit has a hooked portion that is hooked by the hooking portion, and the hooking by the hooking portion can be released by rotating the release means.

[0012] Furthermore, the present invention allows the holding means to have a latching portion provided so as to be able to latch the transmission operation portion, and a biasing means for biasing the latching portion, the transmission operation portion to have a latched portion that is latched by the latching portion, and the latching by the latching portion to be released by sliding the release means. In addition, the present invention allows the release means to be covered with a dustproof plate, except for the release operation portion. [Effects of the Invention]

[0013] The present invention provides a tunnel transmitter that includes a holding means for holding the transmitter operation unit in a pressed state, and a release means for holding the pressed state by the holding means. The release operation unit of the release means is positioned on the back side of the mounting plate when the transmitter is mounted on the mounting plate. This makes it possible to provide a tunnel transmitter that ensures waterproofness while improving work efficiency during inspection. [Brief explanation of the drawing]

[0014] [Figure 1] It is a front view of the first embodiment of the present invention. [Figure 2] It is a perspective view of the first embodiment of the present invention. [Figure 3] It is a sectional view taken along the line III-III in FIG. 1, wherein (a) is a view showing the state before the pushing operation of the transmission operation unit, and (b) is a view showing the state after the pushing operation of the transmission operation unit. [Figure 4] It is a front view of the second embodiment of the present invention. [Figure 5] It is a bottom view of the second embodiment of the present invention. [Figure 6] It is a perspective view of the second embodiment of the present invention. [Figure 7] It is a sectional view taken along the line VII-VII in FIG. 4, wherein (a) is a view showing the state before the pushing operation of the transmission operation unit, and (b) is a view showing the state after the pushing operation of the transmission operation unit. [Figure 8] It is a sectional view taken along the line VIII-VIII in FIG. 5. [Figure 9] It is a front view showing the state in which the transmitter in the first and second embodiments of the present invention is attached to the mounting plate.

Mode for Carrying Out the Invention

[0015] The first embodiment of the present invention will be described based on FIGS. 1 to 3 and FIG. 9. The transmitter 1 is a transmitter for a tunnel, and is provided so as to be attachable to a mounting plate P, and includes a transmission operation unit 2, a holding means 3, and a release means 4. In the present embodiment, a fixture 5 for screwing the transmitter 1 and the mounting plate P is provided. The mounting plate P is, for example, a door plate provided on the front panel of a disaster prevention device such as a fire hydrant device or a fire extinguisher box, and is provided so as to be able to be opened.

[0016] The transmission operation unit 2 is provided for transmitting the occurrence of a fire to a disaster prevention receiver (not shown) or the like when a fire occurs, and is provided so as to be pushable. In the present embodiment, the transmission operation unit 2 has a latched portion 6 that is latched by a latching portion 10 of the holding means 3 described later, and includes a push button portion 7, a push button switch portion 8, and a biasing member 9.

[0017] The push button part 7 is a part that is pressed to send a signal to a disaster prevention receiver (not shown) or the like to indicate that a fire has occurred when a fire breaks out. When the push button part 7 is pushed inward, the push button switch part 8 is pushed, and a fire signal is sent to the disaster prevention receiver or the like. In addition, a hooked part 6 is provided on the push button part 7. By hooking the hooked part 6 to the hooking part 10 of the holding means 3, it is provided so that the pushed state can be held. When the hooking between the hooked part 6 and the hooking part 10 is released, the biasing member 9 causes it to return to the original state.

[0018] The holding means 3 is provided to hold the transmission operation part 2 in a pushed state when the transmission operation part 2 is pushed. The holding means 3 has a hooking part 10 and a biasing means 11. The hooking part 10 is provided so as to be engageable with the hooked part 6 of the transmission operation part 2. By the hooking part 10 hooking the hooked part 6, the transmission operation part 2 is held in a pushed state.

[0019] The release means 4 is connected to the holding means 3 and is provided to release the holding of the pushed state of the transmission operation part 2 by the holding means 3. The release means 4 has a release operation part 12. The release operation part 12 is provided so as to be located on the back side of the mounting plate P when the transmitter 1 is mounted on the mounting plate P.

[0020] In this embodiment, the release means 4 is of a rotary type and is provided so as to be rotatable together with the holding means 3. In addition, the release operation part 12 is provided so as to be located on the side part of the transmission operation part 2 when the transmitter 1 is mounted on the mounting plate P. By doing so, access to the release operation part 12 becomes easier, and the release operation can be performed more easily. <

[0021] The biasing means 11 is provided to bias the latching portion 10, and by biasing the latching portion 10 with the biasing means 11, the engagement between the latching portion 10 and the latched portion 6 is prevented from being unexpectedly released. In this embodiment, the biasing means 11 is provided as a torsion spring and is attached to the pivot shaft 13 of the release means 4, and biases the latching portion 10 inward (towards the transmission operation unit 2 side) by restricting the rotation of the release means 4 and the holding means 3. The biasing force of the biasing means 11, together with the biasing member 9 of the transmission operation unit 2, is adjusted so that the push button portion 7 can be pressed with a force of approximately 20N to 80N.

[0022] In this embodiment, when releasing the pressed state of the transmission operation unit 2, the mounting plate P is opened, a finger or the like is hooked onto the release operation unit 12, and the release means 4 is rotated outward, thereby releasing the engagement between the latching part 10 and the latched part 6. After that, the biasing means 11 returns it to its original position.

[0023] Therefore, in the transmitter 1 of this embodiment, the release operation unit 12 is provided so as to be located on the back side of the mounting plate P when the transmitter 1 is attached to the mounting plate P. As a result, there is no need to provide an opening on the front side of the transmitter 1 for operating the release operation unit 12, and the release operation unit 12 can be located on the back side of the mounting plate P. Thus, it is possible to provide a tunnel transmitter that ensures waterproofness while improving work efficiency during inspection.

[0024] In this embodiment, as a further measure against water ingress, a drain hole 16 is provided on the side of the transmitter 1, for example, on the bottom surface. This ensures that even if water enters the transmitter 1, the water will drain out of the transmitter 1 through the drain hole 16.

[0025] Furthermore, as a secondary effect of making the release mechanism 4 rotatable, as in this embodiment, tunnels are often environments where dust, such as sand, is floating around. If dust gets caught between the pivot shaft 13 and the release mechanism 4, the pressing force may fluctuate due to friction, potentially causing the release mechanism to malfunction. However, by making the release mechanism 4 rotatable, the gaps through which dust can enter can be minimized, and the movement of the release mechanism 4 can also be minimized, thus potentially preventing dust from getting caught in the release mechanism 4 and causing it to malfunction.

[0026] A second embodiment of the present invention will be described with reference to Figures 4 to 9. The difference between this embodiment and the first embodiment is that the release means 4 is of the sliding type instead of the rotating type. Components that have the same reference numerals as in the first embodiment are the same as in that embodiment and will not be described.

[0027] In this embodiment, the biasing means 11 is provided as a coil spring and is fitted onto the sliding portion 14 of the release means 4, which will be described later, and biases the latching portion 10 in the horizontal direction via the sliding portion 14.

[0028] The release means 4 is connected to the holding means 3 and is slidably mounted. By sliding the release means 4, the hooking of the hooked portion 6 by the hooking portion 10 can be released. The release means 4 has a release operation portion 12 and a sliding portion 14.

[0029] In this embodiment, the release means 4 grasps the release operation part 12 and slides the sliding part 14, compressing it against the biasing force of the biasing means 11, thereby releasing the engagement between the latching part 10 and the latched part 6.

[0030] Furthermore, the release mechanism 4 is covered by a dustproof plate 15, except for the release operation part 12 which needs to be exposed to the outside. The dustproof plate 15 is provided to prevent dust from entering the release mechanism 4 and to prevent dust from getting caught in the sliding part 14, hindering its sliding and causing the release mechanism 4 to become immobile. The dustproof plate 15 is preferably made of metal. By making the dustproof plate 15 of metal, the sliding part 14 can be slid without using a lubricant such as grease, and it is possible to prevent dust and other particles from adhering to and sticking to the lubricant.

[0031] Therefore, in this embodiment as well, the same effects can be achieved for the same reasons as in the first embodiment.

[0032] Although the present invention has been described above based on the above embodiments, the present invention is not limited to the above embodiments and can be modified as appropriate without changing the gist of the invention. [Explanation of Symbols]

[0033] 1 Transmitter 2 Transmitter operation unit 3 Holding means 4 Release mechanism 5 Mounting device 6 Attached part 7 Push button section 8 Push button switch section 9 Biasing member 10 Latching part 11 Biasing means 12 Release operation part 13. Rotary shaft 14. Sliding part 15. Dustproof plate 16 Drainage holes P Mounting plate

Claims

1. A tunnel transmitter that is mounted on a mounting plate, A pushable transmission operation unit, When the transmission operation unit is pressed, a holding means for holding the transmission operation unit in the pressed state, The system includes a release means connected to the holding means for releasing the holding state by the holding means, The release mechanism has a release operation unit, The transmitter is characterized in that the release operation unit is provided so as to be located on the back side of the mounting plate when the transmitter is mounted on the mounting plate.

2. The transmitter according to claim 1, characterized in that the release operation unit is provided so as to be located on the side of the transmission operation unit when the transmitter is attached to the mounting plate.

3. The release means is rotatably mounted together with the holding means, The retaining means has a hooking portion and a biasing means that biases the hooking portion, The transmission operation unit has a hooked portion that is hooked by the hooking portion, The transmitter according to claim 1 or 2, characterized in that the locking by the locking portion is released by rotating the release means.

4. The holding means includes a hooking portion provided so as to be able to hook the transmission operation portion, and a biasing means for biasing the hooking portion. The aforementioned transmission operation unit has a hooked portion that is hooked by the hooking portion, The transmitter according to claim 1 or 2, characterized in that the locking by the locking portion is released by sliding the release means.

5. The transmitter according to claim 4, characterized in that the release means is covered with a dustproof plate, except for the release operation part.

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