JP2014099285A - Blackboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blackboard device provided with a lighting device which can be easily installed to a blackboard and, when the lighting device is partially broken and exchange of the lighting device is required, can facilitate an operation for the exchange.SOLUTION: In a blackboard device configured by installing a lighting device 2 on the upper edge part of a blackboard 1, the lighting device 2 comprises a plurality of lighting fixture units 5 formed by arranging an LED module 4 in a metallic lighting fixture main body 3 formed in a unit length along the lighting fixture main body length direction and attachment arms 6 of which the top edge parts are attached to the lighting fixture main bodies 3 of respective lighting fixture units 5, edge parts of the lighting fixture main bodies 3 of the respective lighting fixture units 5 are connected to each other, the top edge parts of the attachment arms 6 are attached to the lighting fixture main bodies 3 of the respective lighting fixture units 5 and base edge parts of the attachment arms 6 are attached to the upper edge part of the black board 1.

Description

  The present invention relates to a blackboard device in which a lighting device is installed at the upper end of the blackboard.

  As a conventional blackboard device of this type, for example, there is one described in Patent Document 1 filed by the same applicant as the present application. This is because the blackboard lighting device has a main body shade frame that fits over the entire length of the blackboard at the upper end of the blackboard, and a light attachment portion having an open bottom surface is formed in the main body shade frame. The LED light formed by arranging the LEDs in a straight line is attached. According to this blackboard lighting device, since it is installed integrally with the blackboard, the illuminance due to the raising and lowering of the blackboard does not change even with the lifting type blackboard, and it uses LEDs, so it has a longer life than the fluorescent lamp and consumes power To save power.

Utility Model Registration No. 31161454

  However, the lighting device of the blackboard device described in the above-mentioned Patent Document 1 has a large number of LEDs on the light mounting portion in the main body shade frame arranged at the upper end portion of the blackboard so as to extend over the entire longitudinal direction of the blackboard device. The LED light is formed by arranging it linearly over the entire length, and since the LED light is formed as an integral one over the entire length of the blackboard, a part of the LED arranged in the main body shade frame is replaced. In such a case, the entire body shade frame must be removed from the blackboard, and it takes a lot of work to replace it. Also, on large blackboards with a length of 3600 mm or 4500 mm, the body shade frame is long. Difficult to bring the main body frame into the field and install it. Further, since the main body shade frame is structured to be fitted to the upper end portion of the blackboard over the entire longitudinal direction, it can only be attached to a flat blackboard and cannot be applied to a curved blackboard or a semi-curved blackboard.

  In view of the above circumstances, the present invention includes an illuminating device that can be easily installed when the illuminating device is easily installed on a blackboard and part of the illuminating device is damaged and needs to be replaced. The purpose is to provide a blackboard device.

  Means for solving the above problems will be described with reference numerals of the embodiments described later. The invention according to claim 1 is a blackboard device in which the lighting device 2 is installed at the upper end of the blackboard 1, The lighting device 2 includes a plurality of lamp units 5 formed by disposing the LED modules 4 along the lamp body length direction in a metal lamp body 3 formed in a unit length, and each of the lamp units 5. It comprises an attachment arm 6 whose tip is attached to the lamp body 3. The lamp body 3 of each lamp unit 5 is connected to each other, and the tip of the attachment arm 6 is attached to the lamp body 3 of each lamp unit 5. The base end portion of the mounting arm 6 is attached to the upper end portion of the blackboard 1.

  Claim 2 is the blackboard device according to claim 1, wherein the lamp body 3 of each lamp unit 5 is formed in a hollow frame shape by a front side wall part A and a rear side wall part B having a substantially C-shaped cross section, The rear side wall portion B is composed of an upper wall portion Ba, an intermediate wall portion Bc, and a lower wall portion Bb. The LED module 4 is attached to the intermediate wall portion Bc, and the upper wall portion Ba and the lower side wall are connected to the module attachment portion. An opening 8 having a wide end at the end of the cross section is formed over the entire length of the lamp body between the portion Bb, and a semitransparent cover 10 is attached in the opening 8.

  Claim 3 is the blackboard device according to claim 1 or 2, wherein the lamp body 3 of each lamp unit 5 is fitted with a nut having a substantially inverted T-shaped cross section upward on the back side of the upper wall portion Ba of the rear side wall portion B. When the fitting groove 9 is provided and the tip of the attachment arm 6 is attached to the lamp body 3 of the lamp unit 5, the tip of the attachment arm 6 extending horizontally is placed on the upper surface side of the nut fitting groove 9, and this attachment is performed. The bolt 17 from the mounting gripping piece 16 that grips the tip of the arm 6 is screwed and tightened to the nut member 18 that is inserted and arranged in the nut fitting groove 9 in a non-rotatable state, whereby the tip of the mounting arm 6 is fixed to the lamp. It is characterized by being attached to the main body 3.

  Claim 4 is the blackboard device according to any one of claims 1 to 3, wherein the mounting arm 6 is made of a pipe material, and the base plate is used to attach the base end of the mounting arm 6 to the upper end of the blackboard 1. The base end portion of the mounting arm 6 extending downward is fitted and fixed to the mounting shaft portion 20 projecting on the base plate 19, and the base plate 19 is fixed to the upper end portion of the blackboard 1. To do.

  A fifth aspect of the present invention is the blackboard device according to any one of the first to fourth aspects, wherein the lamp body 3 of each lamp unit 5 is fitted with a nut having a substantially inverted T-shaped cross section upward on the back side of the rear side wall portion B. When the groove 9 is provided and the lamp body 3 of each lamp unit 5 is connected to each other, the nut member 36 is inserted in the nut fitting grooves 9 and 9 of the lamp bodies 3 and 3 so as not to rotate. At the same time, the connecting plate 37 is disposed on the upper surface side of the nut fitting grooves 9, 9, and screws 38 are screwed and tightened from the connecting plate 37 to the screw holes 36 a of the nut member 36. It is characterized in that the ends are connected to each other.

  Claim 6 is the blackboard device according to claim 4 or 5, wherein the wiring cord 12 of the LED module 4 disposed in the lamp body 3 of each lamp unit 5 is passed through the mounting arm 6. To do.

  The effect of the invention by the above means will be described with reference numerals in the embodiments described later. According to the blackboard device of the invention of claim 1, the lighting device 2 is a metal lamp formed in a unit length. A plurality of lamp units 5 formed by disposing the LED module 4 in the main body 3 along the length direction of the lamp main body, and an attachment arm 6 whose tip is attached to the lamp main body 3 of each lamp unit 5. Thus, if the unit length of the lamp body 3 is set to 1800 mm, for example, two lamp units 5 formed by the lamp body 3 having a length of 1800 mm are connected to the blackboard 1 having a left and right length of 3600 mm. If the same lamp unit 5 is connected, it can be installed on the blackboard 1 having a left and right length of 5400 mm. Therefore, a plurality of lamp units 5 having the same unit length are connected, or a plurality of lamp units 5 having different unit lengths (for example, a lamp unit 5 having a length of 1800 mm and 900 mm) are connected. The lighting device 2 having a length can be formed. In order to install the lighting device 2 on the blackboard 1, the lamp main bodies 3 of the respective lamp units 5 are connected to each other, and the tip of the mounting arm 6 is attached to the lamp main body 3 of each lamp unit 5. It is only necessary to attach the base end portion of 6 to the upper end portion of the blackboard 1, so that the installation work can be easily and easily performed, and it can be installed not only on a flat blackboard but also on a curved blackboard or a semi-curved blackboard. it can.

  And according to this illuminating device 2, since the illuminating device 2 consists of a some lamp unit 5, carrying in to the field of the lamp unit 5 etc. and its attachment work becomes easy, and a part of illuminating device 2 is damaged. Thus, when it is necessary to replace the lamp unit 5, it is sufficient to replace each lamp unit 5. Therefore, the replacement operation is simple and easy, the cost required for the replacement is low, and it is very economical.

  According to the lighting device 2 of the invention according to claim 2, the lamp body 3 of each lamp unit 5 is formed in a hollow frame shape by the front side wall part A and the rear side wall part B having a substantially C-shaped cross section, and the rear part The side wall portion B includes an upper wall portion Ba, an intermediate wall portion Bc, and a lower wall portion Bb. The LED module 4 is attached to the intermediate wall portion Bc, and the upper wall portion Ba and the lower side wall portion are connected to the module attaching portion. Since the opening 8 having a wide end at the end of the cross section is formed across the entire length of the lamp body between Bb and the light emitted from the LED module 4, the surface of the blackboard 1 is effective from the opening 8 opening at the end at the end of the cross section. Can be illuminated. Further, since the lamp body 3 is made of a metal and is formed in a hollow frame shape, the lamp module 4 can sufficiently exhibit a heat radiation function to effectively prevent the LED module 4 from being overheated. The portions 3a and 3b can be effectively used as a wiring cord passage through which the wiring cord is inserted. Moreover, since the front side wall part A of the lamp body 3 on the front side of the blackboard 1 is formed in a substantially C-shaped cross section, the appearance and appearance are good, and between the rear side wall part B The hollow portions 3a and 3b having a sufficiently large cross-sectional area can be formed, thereby further improving the heat dissipation effect. Moreover, since the translucent cover 10 is attached in the opening part 8, the light from the LED module 4 has less glare and flickering, becomes soft light, and the letters on the blackboard surface are easy to see.

  According to the illuminating device 2 of the invention according to claim 3, when attaching the tip of the mounting arm 6 to the lamp body 3 of the lamp unit 5, the section provided on the back side of the rear side wall portion B of the lamp body 3 is substantially tilted upward. The tip end portion of the mounting arm 6 is placed on the upper surface side of the T-shaped nut fitting groove 9, and the bolt 17 is attached to the nut fitting groove 9 from the holding grip piece 16 that holds the tip portion of the mounting arm 6. Since the tip end portion of the mounting arm 6 is attached to the lamp body 3 by screwing and tightening to the nut member 18 inserted and arranged in a non-rotatable state, the mounting position of the tip end of the mounting arm 6 with respect to the lamp body 3 is determined. It can be set arbitrarily along the length direction of the main body 3, and any number of mounting arms 6 can be easily and easily mounted.

  According to the lighting device 2 of the invention according to claim 4, when attaching the base end portion of the attachment arm 6 to the upper end portion of the blackboard 1, the attachment arm extending downward is attached to the attachment shaft portion 20 protruding from the base plate 19. Since the base plate 19 is fitted and fixed, and the base plate 19 is fixed to the upper end of the blackboard 1, the base end of the mounting arm 6 is simple and easy with respect to the upper end of the blackboard 1. It can be firmly attached and fixed.

  According to the illuminating device 2 of the invention according to claim 5, when connecting the lamp main bodies 3 of the respective lamp units 5 to each other between the ends thereof, the nut fitting grooves 9 and 9 of both adjacent lamp main bodies 3 and 3 are extended. The nut member 36 is inserted and arranged in a non-rotatable state, and a connecting plate 37 is arranged on the upper surface side of both nut fitting grooves 9, 9, and screws 38 are screwed from the connecting plate 37 into the screw holes 36 a of the nut member 36. By tightening and tightening, it is possible to easily and easily connect the adjacent two lamp main bodies 3 and 3 together.

  According to the lighting device 2 of the invention according to claim 6, since the wiring cord 12 of the LED module 4 disposed in the lamp body 3 of the lamp unit 5 is inserted into the mounting arm 6, the wiring cord 12 is There is no such thing as jumping out of the top side of the blackboard 1, and the appearance is not impaired and the appearance is not deteriorated.

(a) is a front view of the blackboard apparatus according to the present invention, (b) is a plan view of the blackboard apparatus, and (c) is a side view of the blackboard apparatus. (a) is a partially enlarged plan view of the lighting device, and (b) is a sectional view taken along line XX of (a). It is sectional drawing of the state which attached the base end part of the attachment arm to the upper end part of a blackboard. It is a perspective view which shows the state which has fitted the base end part of the attachment arm in the attachment shaft part on a base board. It is the YY sectional view taken on the line of (a) of FIG. (a) is a top view of the state which connected the lamp main body of each lamp unit with the connection board, (b) is the ZZ sectional view taken on the line of (a).

  A preferred embodiment of the present invention will be described below with reference to the drawings. In (a) to (c) of FIG. 1 showing a blackboard device according to the present invention, 1 is a blackboard, 2 is the upper end of the blackboard 1 The installed lighting device is shown. Upper and lower edge frames 21 and 22 are attached to the upper and lower edges of the blackboard 1, and left and right edge frames 23 and 23 are attached to the left and right edges. Further, as schematically shown in FIG. 1 (c), the blackboard 1 is integrally attached to an elevating frame 24. The elevating frame 24 is fixed to a fixed frame body via known elevating drive means (not shown). The blackboard 1 integrated with the lifting frame 24 can be moved up and down by a predetermined stroke by the lifting drive of the lifting drive means. In FIG. 1 (a), the state in which the blackboard 1 is lowered to the lower movement limit position is indicated by a virtual line. As shown in FIG. 3, the blackboard 1 is formed by adhering a surface plate 1a to a substrate 1o, and an upper frame member 34 of the elevating frame 24 is fixed to the upper end of the back surface of the substrate 1o.

  As shown in FIGS. 1 and 2, the lighting device 2 is formed by disposing the LED module 4 along the length direction of the lamp body in the lamp body 3 made of an extruded aluminum member having a unit length. A plurality of (two here) lamp units 5, 5 and a mounting arm 6 whose tip is attached to the lamp body 3 of each lamp unit 5, and the lamp body 3 of each lamp unit 5 is connected between the ends. The front end of the mounting arm 6 is attached to the lamp body 3 of each lamp unit 5 and the base end of the mounting arm 6 is attached to the upper end of the blackboard 1.

  If the structure of the said illuminating device 2 is demonstrated in more detail, first, the lamp main body 3 which comprises each lamp unit 5 will consist of an aluminum extruded shape, and as shown to (a) and (b) of FIG. The front side wall part A having a substantially C-shaped cross section and the rear side wall part B are formed in a hollow frame shape, and the rear side wall part B is composed of an upper wall part Ba, a lower wall part Bb, and an intermediate wall part Bc. The intermediate wall portion Bc connects the lower end portion of the upper wall portion Ba and the upper end portion of the lower wall portion Bb, and extends so as to be connected to the back side middle step portion of the front side wall portion A. The rear surface of the upper wall portion Ba A nut fitting groove 9 having a substantially inverted T-shaped cross section is formed in the side step portion Bo. The LED module 4 is attached to the lower surface side of the intermediate wall portion Bc, and the opening portion 8 that opens in a substantially fan-shaped cross section from the mounting portion of the module 4 as a main part of the fan is on the back side of the upper wall portion Ba. A plastic translucent cover 10 is attached to the opening 8 formed between the step Bo and the lower wall Bb. Further, end plates 3o made of aluminum are respectively attached to both end surfaces of the lamp body 3 (see FIG. 2B).

  The lamp body 3 of each lamp unit 5 has a unit length of 1800 mm. In the lighting device 2 of this embodiment, as shown in FIGS. 1 (a) and 1 (b), two lamp units 5 are provided. , 5 are connected to each other by their ends, so that the total length of both lamp bodies 3, 3 is 3600 mm. That is, when the length of the blackboard 1 shown in FIG. 1 is 3600 mm, in order to set the length of the lighting device 2 in the left-right direction so as to match the length of the blackboard 1, the length of the lamp body 3 is 1800 mm. It is sufficient to use two lamp units 5 that are.

  Each lamp unit 5 includes, as described above, an aluminum extruded body lamp body 3 formed to a unit length, and an LED module 4 disposed in the lamp body 3 along the lamp body length direction. As shown in FIGS. 2A and 2B, the LED module 4 is attached to the lower surface side of the intermediate side wall Bc of the lamp body 3 along the length direction of the lamp body 3. . An LED module is a product with a minimum configuration in which an LED package (a LED chip encapsulated and easily connected to a substrate) is attached to the substrate and can be used. There are various types of strips having a long length, but in this embodiment, a strip having a relatively long length formed to be approximately the same length as the lamp body 3 is used.

  The mounting arm 6 is made of an aluminum flat pipe material as shown in FIG. 5, and the base end side attached to the upper end portion of the blackboard 1 is perpendicular to the upper end portion of the blackboard 1 as shown in FIG. As shown in FIG. 2B, the front end of the horizontal portion 6b that rises and extends horizontally from the upright portion 6a is attached to the lamp body 3 of the lamp unit 5. In the lighting device 2 shown in FIG. 1, two attachment arms 6 and 6 are attached to the lamp body 3 of each lamp unit 5.

  In attaching the front end of the mounting arm 6 to the lamp body 3 of the lamp unit 5, as can be seen from FIGS. 2 (a), (b) and FIG. 5, the rear side wall in which the nut fitting groove 9 is formed. The front end portion of the horizontal portion 6b of the mounting arm 6 is placed on the upper surface of the rear side stepped portion Bo of the portion B (the upper surface side of the nut fitting groove 9), and the front end portion of the mounting arm 6 is gripped. From the bolt insertion hole 16o of the mounting gripping piece 16, a bolt 17 is screwed into a screw hole 18a of a nut member 18 inserted and arranged in a non-rotatable state in the nut fitting groove 9 to be tightened. It is possible to easily attach and fix the front end of the lamp to the lamp body 3 in a simple manner. As shown in FIG. 5, the mounting gripping piece 16 has a fitting convex portion 16 a that fits the mounting arm 6 from above in a state where the tip of the mounting arm 6 is placed on the upper surface of the nut fitting groove 9. The fitting projection 16a includes attachment pieces 16b and 16b extending horizontally at both ends.

  In order to attach the tip of the mounting arm 6 to the lamp body 3 as described above, the tip of the mounting arm 6 is placed on the upper surface side of the nut fitting groove 9 and the tip of the mounting arm 6 is gripped. If the bolt 17 is screwed and tightened into the screw hole 18a of the nut member 18 inserted and arranged in the nut fitting groove 9 from the bolt insertion hole 16o of the mounting gripping piece 16, the tip of the mounting arm 6 with respect to the lamp body 3 is secured. The attachment position of the part can be arbitrarily set along the length direction of the lamp body 3 and any number of attachment arms 6 can be easily and easily attached.

  Further, when the base end portion of the mounting arm 6 is attached to the upper end portion of the blackboard 1, as shown in FIGS. 3 and 4, the mounting shaft portion 20 that protrudes perpendicularly to the center portion of the upper surface of the rectangular base plate 19. The base end portion of the downwardly extending mounting arm 6 is externally fitted and fixed by a bolt 26, and the base plate 19 is bolted to the upper frame member 34 at the upper end portion of the blackboard 1 as shown in FIG. It may be fixed by.

  In this case, as shown in FIGS. 3 and 4, the base end portion of the mounting arm 6 is provided with a plurality of bolt insertion holes 28 through which the bolts 26 are inserted, and at the same time, a cable extraction hole 29 on the upper side of the bolt insertion hole 28. Is provided. A screw hole 30 into which a bolt 26 is screwed is provided in the mounting shaft portion 20 of the base plate 19. The base plate 19 includes a base plate main body 19a and an end bent piece 19b obtained by bending one end of the base plate downward at a right angle. The base plate main body 19a and the end bent piece 19b include bolts 27. A bolt insertion hole 31 through which a screw is inserted and a screw insertion hole 33 through which a screw 32 is inserted are provided. Accordingly, the bolt 26 is screwed into the screw hole 30 of the mounting shaft portion 20 from the bolt insertion hole 28 of the mounting arm 6 with the base end portion of the mounting arm 6 fitted to the mounting shaft portion 20 on the base plate 19. Tighten. In order to fix the base plate 19 to the upper end portion of the blackboard 1, as shown in FIG. 3, the bolts 27 are placed on the lifting frame 24 fixed to the upper end portion on the back side of the blackboard 1 from the bolt insertion holes 31. It is only necessary to screw and fasten to a lower hole 35 provided in advance in the frame member 34 and screw the screw 32 into the board 1o of the blackboard 1 from the screw insertion hole 33. Note that the upper frame member 34 of the elevating frame 24 is connected and fixed to the upper end surface of the board 1o of the blackboard 1 with a bolt via a connection metal fitting 39 having an L shape in plan view as schematically shown in FIG. .

  When the base end of the mounting arm 6 is attached to the upper end of the blackboard 1 as described above, the base end of the mounting arm 6 is fitted to the mounting shaft 20 projecting on the base plate 19 and the bolt 26 is used. By fixing the base plate 19 to the upper end of the blackboard 1 with bolts 27 and screws 32, the base end of the mounting arm 6 can be easily, easily and firmly attached to the upper end of the blackboard 1. Can be fixed. The base plate 19 is composed of a base plate main body 19a and a bent piece 19b. The base plate main body 19a is fixed to the upper surface of the upper end of the blackboard with a bolt 27, and the bent piece 19b is fixed to the back of the upper end of the blackboard. Since the base plate 19 is fixed to the upper end portion of the blackboard 1 stably and firmly, the base end portion of the mounting arm 6 can be fixed more firmly and stably.

  FIG. 6 shows a connection structure for integrally connecting the lamp bodies 3 and 3 of two adjacent lamp units 5 and 5. That is, in order to connect the opposing lamp bodies 3, 3 of both adjacent lamp units 5, 5, as shown in FIGS. 6 (a) and 6 (b), the opposing lamp bodies 3, 3 are opposed to each other. The nut member 36 is inserted and arranged in a non-rotatable state in both the nut fitting grooves 9 and 9, and a strip-like connecting plate 37 is arranged on the upper surface side of the both nut fitting grooves 9 and 9, and a screw 38. Is screwed into the screw hole 36a of the nut member 36 from the screw insertion hole 37a of the connecting plate 37 and tightened to integrally connect the lamp main bodies 3 and 3 of both the lamp units 5 and 5. In this case, the connecting plate 37 is provided with two screw insertion holes 37a on both ends thereof. Moreover, the nut member 36 is a belt-plate-like thing similar to the connection plate 37, and two screw holes 36a are provided at both ends thereof.

  In order to connect the lamp main bodies 3 and 3 of the both lamp units 5 and 5 as described above, the nut members 36 are inserted and arranged in the nut fitting grooves 9 and 9 of the both lamp main bodies 3 and 3 as described above. At the same time, the connecting plate 37 is disposed on the upper surface side of the nut fitting grooves 9, 9, and the screws 38 from the connecting plate 37 are screwed into the screw holes 36 a of the nut member 36 and tightened, whereby both adjacent lamps are mounted. The main bodies 3 and 3 can be simply and easily connected together accurately.

  The lighting device 2 of the blackboard device described above includes a plurality of lamps formed by disposing the LED module 4 along the length direction of the lamp body 3 in a metal lamp body 3 formed to a unit length. It comprises a unit 5 and an attachment arm 6 whose tip is attached to the lamp body 3 of each lamp unit 5. The lamp body 3 of each lamp unit 5 is connected to each other and attached to the lamp body 3 of each lamp unit 5. Since the distal end portion of the arm 6 is attached and the base end portion of the attachment arm 6 is attached to the upper end portion of the blackboard 1, if the unit length of the lamp body 3 is set to 1800 mm, for example, this length By connecting two lamp units 5 formed of a 1800 mm lamp body 3, the left and right length can be installed on the blackboard 1 3600 mm, and if three lamp units 5 are connected, the left and right length It can be installed on the blackboard 1 of 5400mm.

  In order to install the lighting device 2 on the blackboard 1, the lamp main bodies 3 of the respective lamp units 5 are connected to each other, and the tip of the mounting arm 6 is attached to the lamp main body 3 of each lamp unit 5. Since the base end portion 6 may be attached to the upper end portion of the blackboard 1, the installation work can be easily and easily performed. In particular, according to the lighting device 2, a plurality of lamp units 5 having the same unit length are connected as described above, or a plurality of lamp units 5 having different unit lengths (for example, lamp units 5 having a length of 1800 mm and 900 mm). ) Can be connected to form a lighting device 2 having any desired length. In the case of a school blackboard, the length of the blackboard is generally 1800 mm, 2700 mm, 3600 mm, and 4500 mm. Therefore, the unit length of the lamp body 3 is preferably two types of 1800 mm and 900 mm.

  And in this illuminating device 2, the lamp | ramp main body 3 made from the aluminum extrusion-shaped material of each lamp unit 5 is formed in hollow frame shape by the front side wall part A and the rear side wall part B which are cross-sectional substantially C-shaped, The side wall portion B includes an upper wall portion Ba, an intermediate wall portion Bc, and a lower wall portion Bb. The LED module 4 is attached to the intermediate wall portion Bc, and the upper wall portion Ba and the lower side wall portion Bb are attached to the module attachment portion. Since the opening 8 having a lateral cross-sectionally widening shape (cross-sectional fan shape) is formed over the entire length of the lamp body, light emitted from the LED module 4 is blackboard from the opening 8 that opens in the crosswise widening end shape. One surface can be effectively illuminated. Moreover, since the lamp main body 3 is made of an aluminum extruded profile and is formed in a hollow frame shape, the heat dissipation function is sufficiently exerted, and overheating of the LED module 4 can be effectively prevented. Further, the hollow portions 3a and 3b in the lamp body 3 can be effectively used as a wiring cord passage through which the wiring cord is inserted. Moreover, since the front side wall part A of the lamp body 3 located on the front side of the blackboard 1 is formed in a substantially C-shaped cross section, the appearance and appearance of the lamp body 3 are good, and between the rear side wall part B The hollow portions 3a and 3b having a sufficiently large cross-sectional area can be formed in this, thereby further improving the heat dissipation effect.

  Moreover, since the light emitted from the LED module 4 passes through the semi-transparent cover 10 provided in the opening 8 that opens in the shape of the end of the cross section (fan shape of the cross section), it is soft and free from glare and flicker. Light that is kind to the eyes illuminates the surface of the blackboard 1 and makes it easier to see characters and the like written on the surface of the blackboard 1.

  Further, according to this lighting device 2, when attaching the distal end portion of the mounting arm 6 to the lamp body 3 of the lamp unit 5, the distal end portion of the mounting arm 6 extending horizontally is placed on the upper surface side of the nut fitting groove 9. Then, the bolt 17 from the mounting gripping piece 16 that grips the tip of the mounting arm 6 is screwed and tightened to the nut member 18 inserted and arranged in the nut fitting groove 9 in a non-rotatable state. Since the tip is attached to the lamp body 3, the attachment position of the tip of the attachment arm 6 relative to the lamp body 3 can be arbitrarily set along the length direction of the lamp body 3, and any number of attachment arms 6 can be easily and easily attached. be able to.

  Further, according to the lighting device 2, the mounting arm 6 is made of a pipe material, and the mounting shaft portion 20 that protrudes from the base plate 19 when the base end portion of the mounting arm 6 is attached to the upper end portion of the blackboard 1. Since the base end portion of the mounting arm 6 extending downward is fitted and fixed, and the base plate 19 is fixed to the upper end portion of the blackboard 1, the base end portion of the mounting arm 6 is fixed to the upper end of the blackboard 1. It can be easily and firmly attached and fixed to the part. In this case, the base plate 19 is formed by the base plate main body 19a and the bent piece 19b, the base plate main body 19a is placed and fixed on the upper surface side of the blackboard, and the bent piece 19b is applied to the rear surface side of the upper end portion of the blackboard. If fixed in contact, the base plate 19 can be stably and firmly attached to the upper end portion of the blackboard 1, and the base end portion of the attachment arm 6 can be more firmly and stably fixed.

  Moreover, in this illuminating device 2, in order to connect the lamp main body 3 of each lamp unit 5 between the end parts, the nut member 36 cannot be rotated over both nut fitting grooves 9 and 9 of both the lamp main bodies 3 and 3. The connecting plate 37 is disposed on the upper surface side of the nut fitting grooves 9 and 9, and the screw 38 is screwed and fastened to the screw hole 36 a of the nut member 36 from the connecting plate 37. The matching lamp main bodies 3 and 3 can be easily and easily integrally connected.

  Moreover, in this illuminating device 2, since the wiring cord 12 of the LED module 4 arrange | positioned in the lamp main body 3 of each lamp unit 5 is penetrated to the attachment arm 6, the wiring cord 12 is the blackboard 1. There is no such thing as jumping out of the upper part of the door, and there is no such thing as deteriorating the appearance and appearance.

  In addition, the great feature of the lighting device 2 is that the lighting device 2 is composed of a plurality of lamp units 5, so that it is easy to carry the lamp unit 5 and the like into the field and attach them, and a part of the lighting device 2. When the lamp unit 5 needs to be replaced when it is damaged or the like, the replacement is easy and easy, the cost required for the replacement is low, and it is very economical.

  In the blackboard device described above, the flat blackboard has been described, but the lighting device 2 according to the present invention can also be applied to a curved blackboard. Moreover, this illuminating device 2 can be attached not only at the time of the new installation of an apparatus but also to the existing blackboard.

DESCRIPTION OF SYMBOLS 1 Blackboard 2 Illuminating device 3 Lamp body 4 LED module 5 Lamp unit 6 Mounting arm 6a Mounting arm upright part 6b Mounting arm horizontal portion 8 Opening portion 9 Nut fitting groove 10 Cover 16 Mounting grip piece 18 Nut member 19 Base plate 20 Mounting shaft

Claims (6)

In a blackboard device in which a lighting device is installed at the upper end of the blackboard,
The lighting device includes a plurality of lamp units formed by disposing LED modules along a length direction of the lamp body in a metal lamp body formed in a unit length, and a distal end portion of the lamp body of each lamp unit. The lamp body of each lamp unit is connected to each other, the tip of the mounting arm is attached to the lamp body of each lamp unit, and the base end of the mounting arm is the upper end of the blackboard. A blackboard device that is designed to be attached to the club.   The lamp main body of each lamp unit is formed in a hollow frame shape by a front side wall portion and a rear side wall portion having a substantially C-shaped cross section, and the rear side wall portion includes an upper wall portion, an intermediate wall portion, and a lower wall portion. Therefore, an LED module is attached to the intermediate wall portion, and an opening having a transverse cross-sectional end shape is formed across the entire length of the lamp body between the upper wall portion and the lower wall portion from the module attachment portion, and in this opening portion 2. The blackboard device according to claim 1, wherein a translucent cover is attached.   The lamp body of each lamp unit is provided with a nut-fitting groove having a substantially inverted T-shaped cross section on the back side of the upper wall portion of the rear side wall portion. When attaching the tip of the mounting arm to the lamp body of the lamp unit, A nut in which the tip of a horizontally extending mounting arm is placed on the upper surface side of the joint groove, and a bolt is inserted into the nut fitting groove in a non-rotatable state from a mounting grip piece for gripping the tip of the mounting arm. The blackboard device according to claim 1 or 2, wherein the tip end portion of the mounting arm is attached to the lamp body by screwing and tightening the member.   The mounting arm is made of pipe material, and when attaching the base end of the mounting arm to the upper end of the blackboard, the base end of the mounting arm that extends downward is fitted to the mounting shaft protruding from the base plate. The blackboard device according to any one of claims 1 to 3, wherein the base plate is fixed to an upper end portion of the blackboard.   In the lamp body of each lamp unit, on the back side of the rear side wall portion, a nut fitting groove having a substantially inverted T-shaped cross-section upward is provided, and when connecting the lamp bodies of the lamp units to each other, The nut member is inserted and arranged in a non-rotatable state over both nut fitting grooves, and a connecting plate is arranged on the upper surface side of both nut fitting grooves, and screws from the connecting plate are screwed and tightened into screw holes of the nut member. The blackboard device according to any one of claims 1 to 4, wherein the lamp main body is connected to each other by its end.   The blackboard device according to claim 4 or 5, wherein a wiring cord of an LED module disposed in a lamp body of each lamp unit is passed through an attachment arm.

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