INSTALLATION DEVICE

Abstract: When projection plates of fixture blocks installed on a display apparatus body are inserted into installation windows in left blocks installed on a rail in a ceiling portion, the projection plates are locked and do not come out, whereby the display apparatus body does not drop even when a worker releases his hands therefrom. Hence, the worker can carry out cable connection work with free both hands. Furthermore, to the configuration of a conventional fixture device, a spring washer 18 and a sleeve 19 are added between a screw 16 and a nut plate 14, whereby when the screw 16 is tightened at an improper position, a clearance Z occurs between the tightened screw 16 and a block 13, thereby allowing the screw 16 to move up and down. Hence, if the fixing is improper, a rattle occurs, whereby it is possible to find an improper installation state. The display apparatus body is provided with a latch section having projection sections to be fitted into the recessed section formed in the display section. This latch section has an upper latch and a lower latch configured so as to engage each other with balls held therebetween, and when the upper latch is pressed by the display section and moves, the lower latch engaging the balls also moves . When the lower latch is pressed by the display section and moves, the balls roll inside the slots in the upper latch, whereby the upper latch is configured so as to move after the lower latch has moved by a predetermined distance.

Description: TECHNICAL FIELD The present invention relates to a fixture device for fixing a display apparatus body on the ceiling portion of a vehicle, such as an aircraft. BACKGROUND TECHNOLOGY In recent years, entertainment systems for providing music, video images, etc. to passengers are provided in the cabin of a vehicle, such as a passenger aircraft; for this purpose, a display apparatus for displaying video images is installed. In particular, a display apparatus for the entertainment system of an aircraft is herein taken as an example to be described. FIG.s 5(a) and (b) are perspective views showing a display apparatus body 4 having a display section 6, such as an LCD display apparatus, installed in the ceiling portion and the lower portion of a baggage rack 5 in the cabin of a passenger aircraft. FIG. 5(a) shows the retracted state (the state of nonuse) of the display section 6 of the display apparatus body 4, and (b) of the same figure shows the state of use. In FIG.s 5(a) and (b), the display apparatus body 4 is arranged at the lower portion of the baggage rack 5 of the passenger aircraft, and comprises the display section 6 and an open/close operation portion 7. The display section 6 has a display member 8, such as an LCD flat panel. The display member 8 is held by the open/close operation portion 7 so as to keep the most suitable angle to a passenger. The opening in the display apparatus body 4 is covered with a cover 9 to prevent dirt and dust from entering during the use of the display section 6. The display apparatus body 4 is fixed to the inside of a ceiling portion 3 at the lower portion of the baggage rack 5 by a fixture device that will be described below. FIG. 6 is a sectional view showing the baggage rack 5 and the ceiling portion 3 below the lower portion thereof perpendicular to the direction from the rear to the nose of the aircraft (hereafter referred to as "nose direction"). In FIG. 6, the nose direction is a direction which is perpendicular to the face of the paper. Two rail installation stands 12 and 13 being parallel in the nose direction are fixed on the ceiling face 3A of the ceiling portion 3. A rail 14 is fixed to the lower face of the rail installation stand 12, and a rail 15 is fixed to the lower face of the rail installation stand 13. A left block 16 is attached to the rail 14, and a right block 17 is attached to the rail 15. As shown in FIG. 10, the left end portion 4A of the display apparatus body 4 is supported by the rail 14 (not shown) via the two left blocks 16 installed with a predetermined distance therebetween in the nose direction indicated by an arrow 68. In a similar way, the right end portion 4B of the display apparatus body 4 is supported by the rail 15 (not shown) via the two right blocks 17 installed with a predetermined distance therebetween in the nose direction. In other words, the display apparatus body 4 is installed on the ceiling face 3A via the two left blocks 16 and the two right blocks 17. The fixture device that will be described below comprises the left blocks 16, the right blocks 17 and a fixture block 25 that will be described later. The display apparatus body 4 is required to be installable and removable on and from the rails 14 and 15 by simple operation so as to be replaced promptly at the time of a breakdown or the like. FIG.s 7(a), (b) and (c) are perspective views showing the conventional left block 16 configured so as to be installable and removable easily. FIG.s 7(a) to (c) show steps of installing the left block 16 on the rail 14 shown partially cut away. FIG. 7(a), the left block 16 is inserted into the rail 14 from the opening 14A of the rail 4. Next, as shown in FIG. 7(b), a bar wrench 20 having a hexagonal cross-section is inserted into the hexagonal hole in a hexagonal socket head bolt 18 in the left block 16, and turned about 90° in a direction indicated by an arrow 20A as shown in (c) of the same figure. As a result, a nut plate 22 fixed to the tip of the hexagonal socket head bolt 18 is turned about 90°, whereby both the tip portions 22A thereof engage the bent portions 14B of the rail 14. One left block 16 has two hexagonal socket head bolts 18; hence, by turning four hexagonal socket head bolts 18 in total for the two left blocks 16 about 90° , the two left blocks 16 are installed on the rail 14. In this state, the left blocks 16 can be moved along the rail 14. As shown in FIG.s 8(a) and (b), the fixture block 25 to be connected to the left block 16 is provided on the left end portion 4A of the display apparatus body 4. FIG. 8(a) is a perspective view showing a state before the fixture block 25 is connected to an attachment window 24 formed in the left block 16. The fixture block 25 has an arm 28 rotatably supported by a shaft 27 on a base plate 26. The arm 28 is thinned like the shape of a comb to reduce its weight. A projection plate 29 is provided at the end of the arm 28. The base plate 26 is fixed to the left end portion 4A of the display apparatus body 4 by three sets of bolts and nuts 30. The fixture blocks 25, two in number, as many as the left blocks 16, are fixed to the left end portion 4A. FIG. 8(b) shows a state wherein the projection plate 29 is inserted into the attachment window 24 of the left block 16 as will be described later in detail. Next, description is made as to the right blocks 17 for supporting the right end portion 4B of the display apparatus body 4 shown in FIG. 6. As shown in FIG. 10, the two right blocks 17 are fixed in advance with the predetermined distance therebetween on the right end portion 4B of the display apparatus body 4. FIG.s 9(a) to (c) show steps of attaching the right block 17 of the display apparatus body 4 to the right rail 15. Before these steps, at least two workers lift the display apparatus body 4, and insert the projection plate 29 of the arm 28 of the fixture block 25 into the installation window 24 as shown in FIG. 8(a). While one of the workers holds the display apparatus body 4 so that the projection plate 29 does not come out from the installation window 24, the other worker connects the connector (not shown) of a connection cable, which supplies electrical power and signals to the display apparatus body 4, to the display apparatus body 4 by using both hands. Subsequently, the right block 17 fixed to the right end portion 4B of the display apparatus body 4 is inserted into the inside of the rail 15 from the opening 15A of the rail 15 as shown in FIG. 9(a). At the time of the insertion, a triangular guide plate 33 of the right block 17 facilitates the insertion of the right block 17 into the opening 15A. The distance between the left and right rails 14 and 15 is not always constant but varies at various portions of the aircraft body. However, the projection plate 29 of the arm 28 shown in FIG. 8(a) moves in and out from the insertion window 24 depending on the variation, whereby the installation of the right block 17 is done without causing problems in spite of some variations. Next, as shown in FIG. 9(b), a hexagonal socket head bolt 18 is turned by about 90° by using the wrench 20 in the direction indicated by an arrow 20A as shown in (c) of the same figure. As a result, a nut plate 22 fixed to the tip of the hexagonal socket head bolt 18 is turned about 90°, whereby both the tip portions 22A thereof engage the bent portions 15B of the rail 15. Two nut plates 22 are provided for one right block 17; hence, by turning four hexagonal socket head bolts 18 in total for the two right blocks 17 about 90°, the two right blocks 17 are attached to the rail 15. By turning the four bolts 18 further by a number of turns, the bent portions 15B are held between the tip portions 22A of the nut plates 22 and the right blocks 17, whereby the display apparatus body 4 is firmly fixed to the rail 15. The conventional fixture device has the following problems. When installing the display apparatus body 4 on the left and right rails 14 and 15, at least two workers are required. Hence, the labor cost for the installation is high, whereby reducing this cost is a problem. The present invention is intended to provide a fixture device for a display apparatus body, capable of being installed by one worker. DISCLOSURE OF THE INVENTION A fixture device in accordance with the present invention comprises a block for installation, to be fixed to a rail provided in the ceiling portion of a vehicle for installing a display apparatus body, having an installation window in a side portion and a latch hole in the installation window, and a fixture block installable on said display apparatus body, including a projection section to be inserted into said installation window and a release lever having a cut-and -raised portion that forms a protrusion serving as a latch that enters said latch hole in the installation window and prevents said projection section from separating from the installation window when said projection section is inserted into the installation window. When the projection section is inserted into the installation window, the protrusion enters in the latch hole, preventing the projection section from separating from the block. Hence, even if a worker who installs the display apparatus releases his hands from the display apparatus, the display apparatus is supported by the block and does not drop, whereby the worker can carry out cable connection work with both hands. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1(a) is a perspective view showing a state before the connection of a left block 36 and a fixture block 45 in accordance with an embodiment of the present invention; FIG. 1(b) is a perspective view showing a state after the connection of the left block 36 and the fixture block 45; FIG. 2 is an exploded perspective view showing the fixture block in accordance with the embodiment of the present invention; FIG. 3(a) is a sectional view taken on line III-III of FIG. 1, showing the connection state of the left block 36 and the fixture block 45 in accordance with the embodiment of the present invention and also showing a state wherein the cut-and-raised portion 52A of a release lever 52 falls in a latch hole 44A; FIG. 3(b) is a view showing a state wherein the cut-and-raised portion 52A comes out from the latch hole 44A; FIG. 4 is a side sectional view showing a state wherein a display apparatus body hangs down from the left blocks; FIG. 5(a) is a perspective view showing a state wherein the display section 6 of the display apparatus body 4 in accordance with the conventional example and the present invention in the ceiling portion of the cabin of a passenger aircraft is not used; and FIG. 5(b) is a perspective view showing a state wherein the display section 6 is used; FIG. 6 is a cross sectional view showing the ceiling portion of the cabin of the passenger aircraft provided with the display apparatus body in accordance with the conventional example and the present invention, viewed from the rear to the nose of the aircraft; FIG.s 7(a), (b) and (c) are perspective views showing steps of installing the conventional left block 16 on the left rail 14; FIG. 8(a) is a perspective view showing a state before the conventional left block 16 is connected to the fixture block 25; and FIG. 8(b) is a perspective view showing a state after the connection; FIG.s 9(a), (b), and (c) are perspective views showing steps of installing the conventional right block 17 on the right rail 15; and FIG. 10 is a bottom view showing the display apparatus body 4 in the ceiling portion of the cabin of the passenger aircraft, viewed from below. BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be described referring to FIG. 1 to FIG. 4. <<Preferred embodiment>> A fixture device in accordance with a preferred embodiment of the present invention will be described referring to FIG. 1 to FIG. 4. The fixture device of the present invention is an improvement of the conventional fixture device comprising the left block 16 and the fixture block 25 for supporting the left end portion 4A of the display apparatus body 4 in FIG. 8 of the conventional technology. Since the configurations other than the left block and the fixture block are the same as those in the description of the above-mentioned conventional technology, the components are designated by the same reference numerals and described simply. FIG. 1(a) is a perspective view showing the fixture device in accordance with the present invention, and shows a state before the projection plate 49 of a fixture block 45 is inserted into the installation window 44 of a left block 36 so as to couple both; and (b) shows a state after both have been coupled by the insertion. The left block 36 is attached to a rail 14 that is not shown, in accordance with steps similar to those for the conventional technology shown in FIG. 7. The base plate 46 of the fixture block 45 is fixed to the display apparatus body 4 with three sets of the bolts and nuts 30. FIG. 2 is an exploded perspective view of the fixture block 45. In this figure, an arm 48 thinned like the shape of a comb has the projection plate 49 to be inserted into the installation window 44 of the left block 36. As shown in the sectional view of FIG. 3 (the cross-section III-III of FIG. 1), the projection plate 49 has a hollow portion 57 having an opening in its lower face. A guide hole 58 communicating with the above-mentioned hollow portion 57 of the projection plate 49 is provided at the center portion of the arm 48 shown in FIG. 2. An L-shaped release lever 52 is inserted into the guide hole 58. A plate spring 53 for applying a rotation force to the release lever 52 in a direction indicated by an arrow 60 and a holder 54 are placed upon the lever section 52B of the release lever 52, and fixed with two male screws 55 to the female threads 56 in the arm 48. Hence, the release lever 52 is energized in the direction indicated by the arrow 60 in FIG. 3(a). A cut-and-raised portion 52A in the form of a protrusion is provided at the tip of the release lever 52. The cut-and-raised portion 52A is a tongue-shaped section projecting downward from the lower face of the release lever 52 as shown in FIG. 3(a). When the projection plate 49 is inserted into the installation window 44 of the left block 36 shown in FIG. 1(a), the cut-and-raised portion 52A falls into a latch hole 44A in the installation window 44 as shown in FIG. 3(a), thereby preventing the projection plate 49 from escaping from the installation window 44. When removing the projection plate 49 from the installation window 44, the bent portion 52B of the release lever 52 is pressed in a direction indicated by an arrow 66 as shown in FIG. 3(b). As a result, the release lever 52 rotates in a direction opposite to the direction of the arrow 60 shown in FIG. 3(a), whereby the cut-and-raised portion 52A retracts from the latch hole 44A. When the arm 48 is pulled to the right in the figure in this state, the projection plate 49 comes out from the installation window 44. Since the left-to-right dimension of the latch hole 44A is made larger than the left-to-right dimension of the cut-and-raised portion 52A, the projection plate 49 can move slightly in the left-to-right direction with respect to the left block 36 in the state shown in FIG. 3(a). In FIG. 2, by passing a shaft 47 through holes 61, 63 and 64 in the base plate 46 and a hole 62 in the arm 48, the arm 48 can be rotatably mounted on the base plate 46. A split pin 62 is inserted into a fastening hole 59 formed at the right end of the shaft 47, thereby preventing the shaft 47 from escaping. Description is made as to steps of installing the display apparatus body 4 provided with the fixture devices in accordance with this embodiment on the left and right rails 14 and 15 shown in FIG. 6 by one worker referring to FIG. 1, FIG. 3, FIG. 4, FIG. 7 and FIG. 9. The worker attaches the left blocks 36 to the rail 14 in accordance with steps similar to those for the conventional left blocks 16 shown in FIG. 7. The fixture blocks 45 in accordance with this embodiment are attached beforehand to the left end portion 4A of the display apparatus body 4 by using the bolts and nuts 30. Blocks similar to the conventional right blocks 17 shown in FIG. 9 are attached beforehand to the right end portion 4B of the display apparatus body 4. The worker lifts the display apparatus body 4 configured as described above and inserts the projection plates 49 of the fixture blocks 45 into the installation windows 44 of the left blocks 36. As shown in FIG. 3(a), the cut-and-raised portion 52A of the release lever 52 falls into the latch hole 44A of the installation window 44 as shown in FIG. 3(a), thereby preventing the projection plate 49 from removing from the installation window 44. When the worker releases his hands from the display apparatus body 4 in this state, the display apparatus body 4 has a state hanging from the left blocks 36 as shown in FIG. 4. The worker can connect connectors of connection cables, which supply electrical power and signals to the display apparatus body 4, with both his free hands. After completion of connection of the connectors, the worker lifts the right end portion 4B of the display apparatus body 4, inserts the right blocks 17 into the openings 15A of the rail 15 as shown in FIG. 9, and mounts the right blocks 17 on the rail 15 by using the wrench 20 in a method similar to the conventional method. Since the hole 44A is made wider than the cut-and-raised portion 52A, the projection plate 49 can move slightly with respect to the left block 36, whereby the right block 17 can be inserted easily into the opening 15A of the rail 15 even when a slight positional deviation is present between the rail 15 and the right block 17. By turning the hexagonal socket head bolts 18 about 90° by using the wrench 20, the right block 17 can be mounted on the rail 15. In this state, the left blocks 36 and the right blocks 17 are supported by the rails 14 and 15 via only the tip portions 22A of the nut plates 22. Hence, the display apparatus body 4 can be moved and positioned at a desired position by sliding the left blocks 36 and the right blocks 17 inside the rails 14 and 15. After completion of the positioning of the display apparatus body 4, the four hexagonal socket head bolts 18 in total for the two left blocks 36 and the four hexagonal socket head bolts 18 in total for the two right blocks 17 are turned by a number of turns in the direction indicated by the arrow 20A shown in FIG. 7 and FIG. 9. As a result, the bent portions 14B of the rail 14 are held between the tip portions 22A of the nut plates 22 and the upper face of the left block 36, thereby fixing the left block 36 to the rail 14. In a similar way, the bent portions 15B of the rail 15 are held between the tip portions 22A of the nut plates 22 and the upper face of the right block 17, thereby fixing the right block 17 to the rail 15. INDUSTRIAL APPLICABILITY As described above in detail in the preferred embodiment, in accordance with the present invention, by inserting the projection plates of the fixture blocks at the left end portion of the display apparatus body into the installation windows in the left blocks attached on the rail, the fixture blocks are fixed to the left blocks. Therefore, the display apparatus body does not drop even when a worker releases his hands from the display apparatus body, whereby the worker can carry out necessary cable connection work with both of his free hands. After the completion of the cable connection work, the worker lifts the right end portion of the display apparatus body and fixes the right blocks to the rail. Since these steps of work can be carried out by one worker, the labor for the installation is saved, and a labor cost is reduced.

Claims: A fixture device comprising: a block (36) for installation, to be fixed to a rail (14) provided in the ceiling portion (3) of a vehicle for installing a display apparatus body (4), having an installation window (44) in a side portion and a latch hole (44A) in the installation window (44), and a fixture block (45) installable on said display apparatus body (4), including a projection section (49) to be inserted into said installation window (44) and a release lever (52) having a cut-and-raised portion that forms a protrusion (52A) serving as a latch that enters said latch hole (44A) in the installation window (44) and prevents said projection section (49) from separating from the installation window (44) when said projection section (49) is inserted into the installation window (44). A fixture device in accordance with claim 1, wherein said fixture block (45) comprises an arm (48) having said projection section (49) and a base plate (46) fixable to said display apparatus body (4) and rotatably connected to said arm (48). A fixture device in accordance with claim 1 or 2, wherein said release lever (52) has a bent portion (52B) to which an operation force for separating the cut-and-raised portion that forms the protrusion (52A) from the latch hole (44A) is applied. A fixture device in accordance with any preceding claim, wherein the width of said latch hole (44A) is wider than the cut-and-raised portion that forms the protrusion (52A) so that the cut-and-raised portion that forms the protrusion (52A) having entered said latch hole (44A) is movable.

Inventors: KIMURA SATORU, KIMURA, SATORU
Applicants: MATSUSHITA ELECTRIC IND CO LTD, MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
Application year: 2001
Main classification: B64D11
IPC codes: B60R11, E05B47