JP6678993B2 - Safety bulletin board and change information display plate used for it - Google Patents

Description

  The present invention relates to a safety bulletin board for displaying mandatory items such as workers, educational items, and communication items for safety management at a construction site and the like, and a bulletin plate used therefor.

  At a construction site or the like, a safety bulletin board that displays mandatory items such as workers, educational items, and communication items for safety management is generally installed. Such a safety bulletin board is a rectangular board in which a plurality of vertical girders and a plurality of horizontal girders are installed vertically and horizontally, and a work chief list, accident-free record table, safety goal, work schedule, news, etc. -Shaped notice plate is attached.

  Such a bulletin board has a certain size, and the upper and lower edges of the bulletin plate are inserted into and attached to the upper and lower laterally extending locking recesses of the installation frame to manufacture a safety bulletin board. It is supposed to do.

  As such a safety bulletin board, there is proposed a bulletin board that can be put in a compact storage state, can be easily installed and removed, and can be easily attached with a bulletin plate (see Patent Document 1).

  A sheet safety bulletin board made of a flexible sheet has also been proposed so that it can be easily carried (see Patent Document 2).

  In addition, as heat stroke is occurring frequently due to global warming and countermeasures are required, as a part of the measures, including heat stroke risk based on heat index (WBGT), temperature and humidity are included. There is known a device for displaying in real time (see Patent Document 3).

Patent No. 3931062 Utility model registration No. 3156729 Utility model registration No. 3188285

  The conventional safety bulletin boards disclosed in Patent Document 1 and Patent Document 2 described above are operated by handwriting information, and information such as temperature, elapsed work time, remaining work time, and heat stroke risk is written. It is possible to do it.

  However, information such as temperature, elapsed work time after installation, remaining work time, and heat stroke risk constantly changes, and it is difficult to update the information manually. In other words, there is a risk that a time lag will occur in updating the information or an update omission may occur.

  By the way, the device disclosed in Patent Document 3 displays changing information such as temperature, humidity, and heat stroke risk. However, since the thickness of the device itself in the front-rear direction becomes large, As described above, the upper and lower edge portions cannot be inserted into the locking recessed grooves located above and below. Therefore, even if it is installed at a construction site or the like, it needs to be installed separately from the safety bulletin board. Therefore, in addition to the installation space for the safety bulletin board, an extra installation space is required to install the device shown in Patent Document 3 above. Becomes

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a safety bulletin board and a change information display plate used for the safety bulletin board that can inform the operator of the changing information without error without requiring an extra installation space.

  The invention of claim 1 is a safety bulletin board comprising a mounting frame having locking grooves extending parallel to the lateral direction, wherein a bulletin board is sandwiched between the locking grooves positioned above and below. The notice plate includes a change information notice plate that displays information that changes in the installation environment, and the change information notice plate has a constant thickness in the front-rear direction and displays the change information by using an LED. A plate main body having an engaging plate portion that is provided above and below the plate main body portion and has a thickness in the front-rear direction that is smaller than the thickness of the plate main body portion and that fits into the locking groove of the installation frame. The plate main body is characterized by having a detecting means for detecting the changing information and a display controlling means for receiving the signal from the detecting means and displaying the changing information on the display portion. Here, the bulletin board attached to the safety bulletin board includes a single case and plural cases.

  By doing so, even if the change information display plate has a large thickness in the front-rear direction of the plate body, by inserting the upper and lower engaging plate portions of the plate body portion into the upper and lower engaging recessed grooves of the installation frame, respectively. , Can be attached to an installation frame, like a normal signboard, to form part of a safety bulletin board. Therefore, as a part of the safety bulletin board, it is possible to provide a change information display plate having a display section for displaying information that changes in the installation environment, so that the change information can be erroneously displayed without requiring an extra installation space. Instead, it can inform the worker in near real time.

  In this case, as described in claim 2, the display unit is a temperature display unit that displays the air temperature in the installation environment, which is the changing information, and the detection unit is a temperature sensor that detects the air temperature. The display control means receives a signal from the temperature sensor and digitally displays the temperature on the temperature display unit, or the display unit is the changing information as described in claim 3. , A time display unit for displaying an elapsed time after installation or a remaining work time, the detection unit is a clock unit for measuring time, and the display control unit is for receiving a signal from the clock unit. The elapsed time or the remaining work time may be digitally displayed on the time display unit.

  Further, as described in claim 4, the display unit is a heat stroke risk display unit that displays a heat stroke risk in an installation environment, which is information that changes, and the detection unit is a clock unit that measures time. And a temperature sensor for detecting the temperature and a humidity sensor for detecting the humidity, and further, an index calculation for calculating a heat stroke index at regular time intervals by receiving signals from the clock means, the temperature sensor and the humidity sensor. Means and a signal from the index calculation means, comprising a heat stroke risk determination means for determining the heat stroke risk based on the heat stroke index, the display control means, receiving the signal from the heat stroke risk determination means The heat stroke risk display section may display the heat stroke risk.

  By doing so, it is possible to visually notify the operator of the risk of heat stroke, which is difficult to sense by the body.

  In this case, as described in claim 5, the heat stroke risk display section displays the heat stroke risk stage by the color of light emitted by the LED, and the display control means sets the heat stroke risk. The color emitted by the LED can be changed according to the above.

  In this way, it is possible to easily know the stage of heat stroke risk from the color of the LED that emits light.

  As described in claim 6, when the plate body further receives an alarm and a signal from the clock means and the exponent calculating means, the heat stroke risk is continued when there is a heat stroke risk at every predetermined time. It has a continuation time counting means for adding the fixed time as time, and an alarm sounding means for receiving a signal from the continuation time counting means and notifying by the alarm when the heat stroke risk continuation time exceeds a set value. It is also possible.

  In this way, an alarm will be issued when the heat stroke risk is still high, so that not only the workers near the safety bulletin board but also workers away from the safety bulletin board can be alerted promptly. Can be evoked.

  Then, as described in claim 7, the engaging plate portion may be provided so as to vertically project on the front surface side of the plate body portion.

  By doing so, since it can be attached substantially flush with the surface of another bulletin board, the appearance seen from the front side can be the same as that of the conventional safety bulletin board.

  Further, as described in claim 8, the engagement plate portion may be provided so as to vertically project on the back surface side of the plate body portion.

  By doing so, even if the vertical girders of the installation frame are located on the back side, they can be installed without difficulty.

  As described in claim 9, it is preferable that an outer portion of the plate body is made of FRP.

  With this configuration, portability is not impaired even if various components are provided for controlling the display unit that displays information that changes in the installation environment.

  A tenth aspect of the present invention is a change information display plate used for a safety bulletin board having an installation frame having locking grooves extending parallel to the lateral direction, the change information posting plate displaying information that changes in the installation environment, which is constant in the front-rear direction. And a plate main body having a display portion for displaying using an LED and having a thickness in the front-back direction that is provided above and below the plate main body and is smaller than the thickness of the plate main body, and locks the installation frame. An engaging plate portion that fits in the groove, and the plate body includes a detection unit that detects the changing information, and a display that receives the signal from the detecting unit and displays the changing information on the display unit. And a control means.

  With this configuration, even if the plate main body having the display unit that displays information that changes in the installation environment has a large thickness in the front-rear direction, the upper and lower locking recessed grooves provided in the installation frame are arranged above and below the plate main body. By inserting the engaging plate portion of, it can be attached to the installation frame in the same manner as a normal notice plate.

  As described above, according to the present invention, even if the thickness of the plate main body having the display portion in the front-rear direction is large, by inserting the upper and lower engaging plate portions of the plate main body into the locking groove of the installation frame, Similar to the bulletin board of FIG. 3, a part of the safety bulletin board can be formed by a change information bulletin board that is attached to the installation frame and displays information that changes in the installation environment. Therefore, as a part of the safety bulletin board, it is possible to provide a change information display plate that displays information that changes in the installation environment, so that no extra space is required for installation and the changing information can be displayed without error. , Can inform workers in near real time.

It is a front view showing one embodiment of a safety bulletin board concerning the present invention. It is a front view of a change information notice plate used for the safety bulletin board. It is a partial side view of the safety bulletin board which attached the change information notice plate by making the plate body part project backward. It is a rear view of the same part. It is the same part front view. It is a system configuration diagram of a change information display plate. It is a figure which shows the relationship between WBGT, temperature, and relative humidity. It is a flow chart which shows the judgment operation of the heat stroke risk judging means. It is a flowchart which shows the display control operation of the heat stroke risk display part by a display control means. It is a flow chart which shows the count operation of the heat stroke risk continuation time counting means. It is a flowchart which shows the alerting | reporting operation | movement of an alarm ringing means. It is a front view showing other embodiments of a change information notice plate. It is a front view which shows other embodiment of the safety bulletin board. It is a side view of the safety bulletin board which attached the change information notice plate by making the plate body part protrude forward. FIG. It is the same front view.

  Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing an embodiment of a safety bulletin board according to the present invention, and FIG. 2 is a front view of a change information display plate used for the safety bulletin board.

  As shown in FIG. 1, the safety bulletin board 1 (safety and hygiene bulletin board) displays nine bulletin plates (that is, eight ordinary bulletin boards 2) on the front side of an installation frame 11 described later and information that changes in the installation environment. One change information display plate 3A) to be displayed is attached. In this embodiment, nine bulletin boards 3 and 3A are attached. However, some of the bulletin boards may not be provided and may be vacant. Further, the size and shape of the installation frame 11 are changed according to the size and shape of the bulletin boards 3 and 3A.

  As shown in FIG. 2, the change information display plate 3A includes a thick plate body 5 having a constant thickness in the front-rear direction, and engagement plate portions 6 and 7 provided above and below the plate body 5. Prepare The number of the engaging plate portions 6 is one and the number of the engaging plate portions 7 is two, but the number thereof is not particularly limited. In order to ensure portability, the plate body 5 has an outer portion made of FRP, and the total weight of the change information display plate 3A is about 1 to 10 kg.

  On the front side of the plate body 5, a date / time display section 4A, a temperature display section 4B, and a heat stroke risk display section 4C are arranged side by side on the upper side as a display section for displaying the changing information using LEDs. , And the elapsed time display portion 4D is provided on the lower side. Then, a speaker 8 (built-in speaker) is arranged beside the elapsed time display portion 4D.

  As the changing information, the date / time display unit 4A alternately displays the date and time, the temperature display unit 4B displays the temperature in the installation environment, and the heat stroke risk display unit 4C, The heat display risk in the installation environment is displayed, and the time display unit 4D displays the elapsed time after installation. The date / time display unit 4A alternately displays the date and the time in one display window. However, the date display unit and the time display unit use separate display windows for the date display and the time display. It can also be used as a display unit. Further, the time display unit 4D may be a time display unit that displays the remaining work time required for work instead of the elapsed time after installation. In this case, a signal from a clock 23 described later is received, and the remaining work time is digitally displayed on the time display section 4D. Further, although the temperature display unit 4B displays the temperature corrected by the temperature correction unit 29 described later, the temperature display unit 4B may display the temperature detected by the temperature sensor 21 as it is.

  The engagement plate portions 6 and 7 are plate-shaped, have a thickness in the front-rear direction smaller than the thickness of the plate body portion 5, and are provided so as to vertically project on the front surface side of the plate body portion 5.

  Then, as shown in, for example, FIGS. 3 to 5, in the installation frame 11 to which the change information display plate 3A is attached, a plurality of horizontal girders 12 are arranged in parallel in the horizontal direction, while a plurality of vertical girders 13 are arranged horizontally. They are arranged in parallel in the longitudinal direction with the intermediate plate 14 sandwiched behind the girders 12. In the portion of the intermediate plate 14 between the horizontal beam 12 and the vertical beam 13, locking recessed grooves 15a, 15b, 16a, 16b are formed above and below the horizontal beams 12, 12. The upper engaging groove 12b is opened downward, and the lower engaging groove 13a is opened upward, and the upper and lower edge portions of the bulletin plate 3 and the upper and lower engaging plate portions 6 of the change information bulletin plate 3A are opened therein. , 7 are attached, the bulletin boards 3 and 3A are attached, and become part of the safety bulletin board 1. In the state of being attached in this manner, the engagement plate portions 6 and 7 are hidden by the cross beams 12 and 13.

  In this case, the change information display plate 3A is attached so that the plate body 5 projects rearward of the safety bulletin board 1, and the front surface (display surface) is substantially flush with the other display plates 3, so that the appearance is conventional. It looks like the safety bulletin board of, and the appearance of the safety bulletin board as a whole does not change.

  To attach the change information display plate 3A to the installation frame 11 (safety bulletin board 1), first of all, from the front side of the installation frame 11 to the upper locking plate portion 6 as in the case of attaching other ordinary display plates 3. Is inserted into the upper engaging groove 15b and is positioned at the rear side of the upper cross beam 12.

  Next, while maintaining the inserted state and lifting, the lower locking plate portion 7 is inserted into the lower locking recessed groove 16a and is positioned at the rear side of the lower cross beam 12.

  As a result, the upper and lower engaging plate portions 6 and 7 of the change information display plate 1 engage with the upper and lower engaging recessed grooves 12a and 13a, and are attached so as not to come off. On the contrary, the lower locking plate 7 may be inserted before the upper locking plate 6 is inserted.

  Next, the configuration of the control system included in the change information display plate 3A (plate body 5) will be described with reference to FIG.

  The plate body 5 includes a date / time display portion 4A, a temperature display portion 4B, a heat stroke risk display portion 4C, an elapsed time display portion 4D, a built-in speaker 8, a temperature sensor 21, a humidity sensor 22, and a clock 23 that can be seen from the front side. , An internal storage device 24. The internal storage device 24 stores audio data 24a used as an alarm.

  The plate body 5 also includes a display control unit 25, an alarm ringing unit 26, a heat stroke risk determination unit 27, a heat stroke risk duration time counting unit 28, and a temperature value correcting unit 19. The display control unit 25 controls the display of the date / time display unit 4A, the temperature display unit 4B, the heat stroke risk display unit 4C, and the elapsed time display unit 4D.

  The heat stroke risk determination means 27 respectively obtains temperature information by the signal from the temperature sensor 21 and relative humidity information by the signal from the humidity sensor 22, and based on them, calculates a WBGT value from the map shown in FIG. 7, Based on the calculation result, the heat stroke risk is judged in four stages. That is, as shown in Table 1, when the WBGT value is less than 25 ° C., “caution”, when 25 to 28 ° C., “warning”, when 28 to 31 ° C., “strict warning”, and when 31 ° C. or more Is judged to be "dangerous".

In addition, Table 1 is quoted from the Japanese Society for Biometeorology, "Guideline for Prevention of Heat Stroke in Daily Life Ver. 3" (2013).

  The determination operation of the heat stroke risk determination means 27 will be described with reference to FIG.

  First, temperature information and relative humidity information are read by signals from the temperature sensor 21 and the humidity sensor 22 (S11). Then, since it may be necessary to correct the temperature (air temperature) depending on the installation condition of the temperature sensor 22, the temperature information may be changed according to the contents set by the temperature correction means 29 through the operation unit (not shown) by the operator. Is corrected (S12) to obtain corrected temperature information.

  Next, the WBGT value is calculated based on the relative humidity information and the corrected temperature information (S13). The WBGT value is calculated based on the map showing the relationship between the WBGT value shown in FIG. 7, and the temperature and the relative humidity. In addition, FIG. 7 is quoted from the Japanese Society for Biometeorology, "Guideline for Prevention of Heat Stroke in Daily Life Ver. 3" (2013).

  Next, the heat stroke risk is determined according to the calculated WBGT value (S14), and the process ends. The heat stroke risk is determined based on the classification of the temperature standard (WBGT) shown in Table 1.

  The operation of displaying the result of heat stroke risk determination by the heat stroke risk determination means 27 on the heat stroke risk display portion 4C by the display control means 25 is repeated until the power is turned off. As a result, the display of the heat stroke risk, which fluctuates moment by moment according to the environment where the safety bulletin board 1 is installed, is constantly updated, and the worker is notified in real time.

Next, the display control of the heat stroke risk display portion 4C by the display control means 25 will be described with reference to FIG. This control starts when the power is turned on and is repeated until the power is turned off.
When started, it is determined whether or not a predetermined time has elapsed (S21), and if YES, the heat stroke risk determination result by the heat stroke risk determination means 27 is acquired (S22). Then, the obtained heat stroke risk determination result is displayed on the heat stroke risk display portion 4C (S23), that is, the LED corresponding to the stage of the heat stroke risk is caused to emit light, and the process returns to step S21.

  On the other hand, if NO in step S21, the determination in step S21 is repeated until YES.

  As a result, the heat stroke risk determination result is acquired at regular time intervals, the display in the heat stroke risk display portion 4C is updated, and a new heat stroke risk determination result is always displayed, regardless of the work of the worker to fill in. To be done. As a result, the operator's attention is called up visually.

  The heat stroke risk duration time counting means 28 determines whether the temperature reference (WBGT) has reached a preset level, for example, “warning” level, based on the heat stroke risk determination result by the heat stroke risk determining means 27. A certain time is counted as the heat stroke risk duration. Then, the heat stroke risk duration time counting means 17 is reset to 0 when returning to the "attention" level. It should be noted that it is possible to use a “severe alert” level or a “danger” level as the set level instead of the “alert” level.

  The counting operation of the heat stroke risk duration time counting means 28 will be described with reference to FIG. This counting operation is started by turning on the power supply and continued until the power is turned off. That is, steps S31 to S35 are repeated at time intervals set by the operator.

First, it is determined whether or not the set time has elapsed (S31), and if it has elapsed, the heat stroke risk determined by the heat stroke risk determination means 27 is acquired (S32). On the other hand, if it has not elapsed, the determination of S31 is repeated until the time elapses. Subsequently, it is determined whether or not the acquired heat stroke risk has reached a set level (for example, "alert level" (S33)). If the heat stroke risk exceeds the set level, the installation time is added to the heat stroke risk duration (S34), while if the heat stroke risk is below the set level, it is considered that the heat stroke risk is not a problem. Therefore, the heat stroke risk duration is reset to 0 (S35), and the process returns to step S31.

  The alarm sounding means 26 acquires the heat stroke risk duration time by the heat stroke risk duration time counting means 28, and when the duration time exceeds the target time set by the operator through the operation unit (not shown), The audio data 24a for warning is reproduced through the speaker 8. In other words, the alarm sounding means 26 sounds an alarm (sound data 24a) stored in the internal storage device 24 when the state of high heat stroke risk continues beyond the target time, and the sound is given by the alarm. Call attention.

  The notification operation of the alarm sounding means 26 will be described with reference to FIG.

  First, the counted heat stroke risk duration is acquired from the heat stroke risk duration counting means 28 (S41), and it is determined whether or not the heat stroke risk duration has reached a set value or more (S42).

  If the heat stroke risk duration is less than the set value, the process ends. On the other hand, when the heat stroke risk duration time reaches or exceeds the set value, the voice data 24a (voice data that prompts a warning to people around) stored in the internal storage device 24 is reproduced through the speaker 8 for a certain period of time. (S43), the fact that the heat stroke risk is increased is notified, and the process ends.

  An external speaker 31 can be connected to the change information display plate 5 (see FIG. 5). In that case, the alarm sounding means 26 can reproduce the audio data 24a not only from the built-in speaker 8 but also from the external speaker 31 as necessary. As the external speaker 31, for example, an external speaker manufactured by PATLITE can be used, but the external speaker 31 is not particularly limited thereto.

  The embodiment of the present invention described above is merely an example for explaining the present invention, and various modifications can be made without departing from the scope of the present invention.

  For example, the positions at which the display units 4A to 4D are provided are not particularly limited. For example, like the change information display plate 3B shown in FIG. 11, the date / time display section 4A having a longer display section is arranged on the upper side, and the temperature display section 4B and the heat stroke risk display section 4C are arranged on the lower side. You can also In this case, the speaker 8 (built-in speaker) is arranged beside the date / time display unit 4A.

  The change information display plate 3B shown in FIG. 12 is different from the change information display plate 3A shown in FIG. 2 in that the time display section 4D and the space handwritten by the operator such as “target time” and “construction period” are omitted. , The size has been reduced.

  Then, as shown in FIG. 13, the change information bulletin board 3B may be a safety bulletin board 1B arranged alongside the change information bulletin board 3C including the elapsed time display portion 4D.

  Also, in this safety bulletin board 1B, unlike the case described above, as shown in FIGS. 14 to 16, the engaging plate portions 6 and 7 are provided so as to vertically project on the back side of the plate body portion 5. There is. Therefore, in the attached state, the panel body portion 3B is projected to the front of the safety bulletin board 1B.

  Such a structure is effective when it is not desired to project the plate body 5 to the rear of the safety bulletin board 1B. For example, a case where the vertical girders 13 of the installation frame are present on the back side of the change information display plate 3C and the plate body 5 cannot be projected to the rear of the safety bulletin board is applicable.

  Further, in the above-described embodiment, the heat stroke risk display unit 4C has a plurality of LEDs, and the display control means 25 emits light by causing any of the LEDs to emit light according to the heat stroke risk. Although the color is changed, it is also possible to have only one LED and the display control means may change the color emitted by the LED according to the heat stroke risk.

1 Safety Bulletin Board 2 Bulletin Plate 3, 3A, 3B Change Information Bulletin Plate 4A Date / Time Display 4B Temperature Display 4C Heat Stroke Risk Display 4D Time Display 5 Plate Body 6, 7 Engagement Plate 8 Speaker 11 Installation Frame 12 horizontal girder 13 vertical girder 14 intermediate plate 15a, 15b, 16a, 16b locking groove 21 temperature sensor 22 humidity sensor 23 clock 24 internal storage device 24a voice data 25 display control means 26 alarm ringing means 27 heat stroke risk determining means 28 Heat stroke risk duration time counting means 29 Temperature correction means

Claims (10)

A safety bulletin board comprising a mounting frame having locking grooves extending parallel to the lateral direction, in which a bulletin board is sandwiched between the locking grooves positioned above and below,
The bulletin plate includes a change information bulletin plate that displays information that changes in the installation environment,
The change information display plate has a plate body having a constant thickness in the front-rear direction and a display unit for displaying the changing information using LEDs, and a thickness in the front-rear direction provided above and below the plate body. An engaging plate portion that is smaller than the thickness of the plate body portion and fits into the locking groove of the installation frame,
The safety bulletin board characterized in that the plate body section has a detection means for detecting the changing information and a display control means for receiving the signal from the detecting means and displaying the changing information on the display section. The display unit is a temperature display unit that displays the temperature in the installation environment, which is the changing information.
The detection means is a temperature sensor for detecting the temperature,
The safety bulletin board according to claim 1, wherein the display control means receives a signal from the temperature sensor and digitally displays the temperature on the temperature display section. The display unit is a time display unit for displaying the elapsed time after installation or the remaining work time, which is the changing information.
The detection means is a clock means for measuring time,
The safety bulletin board according to claim 1, wherein the display control means receives a signal from the clock means and digitally displays the elapsed time or the remaining work time on the time display section. The display unit is a changing information, a heat stroke risk display unit that displays the heat stroke risk in the installation environment,
The detection means is a clock means for measuring time, a temperature sensor for detecting the temperature, and a humidity sensor for detecting the humidity,
Further, an index calculation means for receiving a signal from the clock means, the temperature sensor and the humidity sensor to calculate a heat stroke index at regular time intervals, and a signal from the index calculation means for receiving a heat stroke based on the heat stroke index. With heat stroke risk determination means for determining risk,
The safety bulletin board according to claim 1, wherein the display control means receives a signal from the heat stroke risk determination means and causes the heat stroke risk display portion to display the heat stroke risk. The heat stroke risk display section displays the stage of the heat stroke risk in a color emitted by an LED,
The safety bulletin board according to claim 4, wherein the display control means changes a color emitted by the LED according to the heat stroke risk.   The plate main body further receives an alarm and a signal from the clock means and the exponent operation means, and adds the certain time as the heat stroke risk duration when there is a heat stroke risk at each elapse of the certain time. The safety bulletin board according to claim 5, further comprising: time counting means and alarm sounding means for receiving a signal from the duration counting means and notifying by the alarm when the duration of heat stroke risk duration exceeds a preset value. .   The safety bulletin board according to any one of claims 1 to 6, wherein the engagement plate portion is provided so as to vertically project on the front surface side of the plate body portion.   The safety bulletin board according to any one of claims 1 to 6, wherein the engaging plate portion is provided so as to vertically project on a rear surface side of the plate body portion.   The safety bulletin board according to any one of claims 1 to 8, wherein an outer portion of the plate body portion is made of FRP. A change information display plate used for a safety bulletin board having an installation frame having locking grooves extending parallel to the lateral direction and displaying information that changes in an installation environment,
A plate main body having a display part having a certain thickness in the front-rear direction and displaying using an LED, and a thickness provided in the upper and lower sides of the plate main body in the front-rear direction smaller than the thickness of the plate main body. An engaging plate portion that fits into the locking groove of the frame,
The change information bulletin board is characterized in that the plate body has a detection means for detecting the changing information and a display control means for receiving the signal from the detecting means and displaying the changing information on the display portion. plate.