JPH0971395A - Display device installed on automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To elevate a display device install on an automobile by using exhaust gas of the automobile. SOLUTION: A display device 1 to carry out display of construction, etc., is moved to elevate by an elevating mechanism 3 consisting of pantagraphs 9a, 9b and an air bag 10. Expansion of the air bag 10 is carried out by supply of exhaust gas of an automobile. Consequently, an independent driving source is eliminated, failure is reduced and maintenance is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device mounted on an automobile, and more particularly to a display device which can be vertically moved up and down through an elevating mechanism.

[0002]

2. Description of the Related Art A person who works on a road such as road construction is required to promptly inform a vehicle passing through a work area that the vehicle is working, and to ensure the safety of both the operator and the passengers of the vehicle. Conventionally, as one of the notification means, an electric motor is placed on the bed of a construction vehicle, for example, a small truck, and the rotational force of the motor is converted into vertical movement via a transmission mechanism such as a worm gear and a rack gear to operate the display device up and down. is there. During construction, the motor is driven to raise the display device to make it easier to see, for example, "under construction" is displayed, and when the display device is not used, it is lowered to turn off the display.

There is also known a structure in which a display device mounted on a truck bed is erected by using a hydraulic cylinder when the truck is in use and is laid down on the truck bed when not in use.

On the other hand, it is known to use an exhaust gas of an automobile as a driving force for raising and lowering a luggage using an air bag and for expanding and contracting the air bag (for example, Japanese Utility Model Laid-Open No. 60-36999). ).

[0005]

Since a construction vehicle is often exposed to wind and rain, when the electric motor or hydraulic device as described above is used as a lifting mechanism for the display device, the vehicle is wet and rains. There is a problem that parts are rusted, and sand and dust penetrate into the mechanism part to prevent smooth operation. Therefore, maintenance and maintenance of the parts are troublesome. In addition, the display device is normally lifted and lowered only once at the start and end of one construction, and the driving time is extremely short (up to several tens of seconds).
It is uneconomical to provide an independent drive source for such drive and a complicated mechanical section that requires maintenance and maintenance.
Not preferred. Further, in a device using a hydraulic cylinder, the display device when not in use is placed in a state of being laid down on the luggage carrier, so that there is a problem that luggage cannot be placed on the luggage carrier. Even if the luggage is placed on the collapsed display device, the luggage must be removed when the display apparatus is erected, and the work is troublesome, so that the space of the luggage carrier can hardly be used. An elevating device that can be operated manually without a drive source is also conceivable, but even such an elevating device requires a mechanical portion and cannot prevent failure due to rust generation and adhesion of sand and dust. If it is manual, there is a problem that the operation is troublesome.

The present invention has been made in order to solve such a problem, does not require a dedicated drive source, has a small effect even when exposed to wind and rain, and is easy to maintain and maintain. A display device having a mechanism is provided.

[0007]

DISCLOSURE OF THE INVENTION The present invention is a display device which is attached to a bed of an automobile through an elevating mechanism.
The elevating mechanism has a bellows-shaped airbag formed of a flexible material having airtightness, and the airbag is inflated and contracted by supplying and exhausting exhaust gas of the automobile.

In the present invention, the elevating mechanism comprises a pantograph which is expanded and contracted by expanding and contracting the airbag.

Further, in the present invention, the elevating mechanism includes a lower substrate mounted and fixed on a loading platform of the automobile, rails formed on the lower substrate vertically to the left and right, and a roller rolling on the rail. An upper substrate having the left and right side surfaces thereof and the display device attached to the upper portion thereof, and one set is arranged in the front-rear direction between the upper substrate and the lower substrate to connect the two, and the expansion and contraction of the upper substrate. A pantograph for raising and lowering the board and a stopper for fixing the upper board in a raised position are provided, and the airbag is arranged between the pair of pantographs, and expands and contracts to drive the pantograph to expand and contract. It is a thing.

Further, in the present invention, when the X-shaped portion of the pantograph is counted as one stage and the total number of stages is n, the number of stages of the pantograph to which the inflation and contraction force of the airbag is applied is n-1 or less. Is set to.

Further, in the present invention, the lifting mechanism is
The airbag includes a plurality of bridges horizontally bridged in the middle of the set of pantographs and a plurality of intermediate plates horizontally supported by the bridges, and the airbag is the uppermost part of the intermediate plates. And the expansion of the lowermost intermediate plate,
By contraction, the pantograph is driven to expand and contract.

Further, in the present invention, the airbag comprises a plurality of connected airbag units, each airbag unit being positioned between the intermediate plates and having an opening formed in a central portion of the intermediate plates. It is made to be connected through.

[0013]

In the structure according to the first aspect of the present invention, the engine of the automobile is driven and the exhaust gas thereof is supplied to the air bag to be inflated to raise the display device. At this raised position, the display device is turned on and a predetermined display is made. When the display is ended, the exhaust gas in the airbag is discharged and contracted, and the display device descends.

In the structure according to the second aspect, when the airbag is inflated by the supply of the exhaust gas, the pantograph expands and the display device rises. On the other hand, when the exhaust gas in the airbag is exhausted and contracts, the pantograph is folded,
The display device descends.

In the structure according to the third aspect, when the airbag expands due to the supply of the exhaust gas, the pantograph expands and pushes up the upper substrate and the display device. The roller provided on the side surface of the upper substrate rolls along the rails and rises while being kept horizontal. When the upper substrate rises to the uppermost end, the stopper is engaged and the upper substrate is fixed. At this position, the display device is turned on, and various notifications and warnings are given. After the stopper is applied, the supply of exhaust gas to the airbag is stopped and the exhaust state is set. At this time, since the upper substrate remains fixed to the uppermost end, the pantograph and the airbag are kept in a stretched state. Further, the internal pressure of the airbag is reduced to a pressure equal to the external atmospheric pressure due to the exhaust. After the end of the display, the exhaust gas of the automobile is supplied to the airbag again to be inflated. The stopper is removed when pushing force is applied to the upper substrate by the expanded airbag. After that, when air supply to the airbag is stopped and natural exhaust is performed, the pantograph is folded by the weight of the upper substrate and the display device, the airbag is contracted, and the display device descends.

In the structure according to the fourth aspect, when the exhaust gas is supplied to the airbag to inflate it and the number of stages of n-1 or less of the pantograph is extended, the pantograph has n.
The stage lift and pantograph lift are greater than airbag lift.

In the structure according to the fifth aspect, when exhaust gas is supplied to the airbag to inflate it, the intermediate plates located at the top and the middle are pushed up, and the pantograph expands. The expansion of the pantograph raises the upper substrate and the display device. On the other hand, by stopping the supply of the exhaust gas to the airbag, the stretching force to the pantograph and the pushing force to the upper substrate by the airbag disappear. At this time, if the stopper is engaged, the upper substrate and the display device are fixed to the uppermost end. On the other hand, if the stopper is released, they will descend due to the weight of the upper substrate and the display device,
The pantograph is folded, the airbag is pressed by the intermediate plate and contracts, and the display device descends.

In the structure of the sixth aspect, an intermediate plate is interposed between the two airbag units, and the two airbag units are connected and communicated with each other through an opening formed in the center of the intermediate plate. Since the intermediate plate is maintained in a horizontal state, the airbag unit sandwiched between them is kept horizontal. Further, the opening in the center of the intermediate plate prevents the connecting portion between the airbag units from being displaced in the horizontal direction.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 and 2, reference numeral 1 is a flat box-shaped display device, which is equipped with a light source such as a lamp, a fluorescent lamp, an LED, etc., and various notifications, warnings, etc. are displayed by lighting these, for example. Display toward the rear of the installed car. It is also possible to eliminate the need for a light source by forming the display portion with a luminous paint containing a phosphor material. The illustrated example indicates that road construction is in progress, and a warning light 2 can be added. Reference numeral 3 is an elevating mechanism formed in the lower portion of the display device 1, and its constituent parts will be described below. The illustrated example shows a state in which the display device 1 is raised.

Reference numeral 4 denotes a lower board which is placed and fixed on a luggage carrier of an automobile, and reference numerals 5 and 5 denote side walls vertically formed on the left and right sides of the lower board 4, and two rails 6 and 6 are provided on inner surfaces thereof. 6 are arranged. Reference numeral 7 denotes an upper substrate having rollers 8, 8 ... Rolling on the rails 6, 6 on its left and right side surfaces, and the display device 1 fixed to the upper portion thereof, and 9a, 9b denote a space between the upper and lower substrates 4, 7. A pair of pantographs arranged in the front-rear direction has upper and lower ends connected to the upper and lower substrates 4 and 7.
Reference numeral 10 denotes upper and lower substrates 4, 7 and pantographs 9a, 9b.
It is a bellows-shaped airbag arranged between the two. That is, the airbag 10 includes upper and lower substrates 4, 7 on the upper and lower sides, side walls 5, 5 on the left and right side surfaces, and pantographs 9a, 9 on the front and rear sides.
It is arranged in the space surrounded by b. Pantograph 9
The right sides of the upper and lower ends of a and 9b are rotatably supported by the lower substrate 4 and the upper substrate 7, respectively, and the left sides thereof are rotated by the long hole frames 11 and 11 provided in the lower substrate 4 and the upper substrate 7, respectively. It is slidably supported.

12, 12, ... Are pantographs 9a, 9b.
Is a rod-shaped bridge that connects the two pantographs 9a and 9b in the middle of the
The sets (in the illustrated case) are provided at equal intervals in the vertical direction.
13 are intermediate plates supported by the cross-linked bodies 12, 12 ... Of each set, and in the case of this example, four sheets are arranged horizontally and at equal intervals. As shown in FIG. 2, each intermediate plate 13 is fixed to the right-hand cross-linking body 12, and the left-hand cross-linking body 12 is provided with a long hole frame 14.
Supported through. Therefore, even if the pantographs 9a and 9b expand and contract and the horizontal distance between the bridges 12 and 12 changes, the expansion and contraction operation of the pantographs 9a and 9b is not hindered by the intermediate plate 13. Each intermediate body 13 moves up and down according to the expansion and contraction operation of the pantographs 9a and 9b.
The uppermost intermediate plate 1 among the four intermediate plates 13, 13 ...
3 is supported below the bridges 12 and 12, and the other three intermediate plates 13, 13 ... Are supported above the bridges 12 and 12.

Reference numerals 15 and 15 are stoppers provided above the side walls 5 and 5. FIG. 3 shows the stopper 15, 16 is an opening formed in the side wall 5, and 17 is a rotatably supported by a shaft 18 by a stopper pin arranged in the opening. The shaft 18 is fixed to the outer surface of the side wall 5 by fixing portions 19 and 19. Reference numeral 20 is an operation lever rotatably supported by a shaft 18, 21 is a coil spring connecting the operation lever 20 and the stopper pin 17, and 22 is a fixed position of the operation lever 20 (open position). It is a locking part for keeping. When the operating lever 20 is removed from the locking portion 22, the stopper pin 17 is tilted to the horizontal position by its own weight. When the display device 1 is raised in such a state, the display device 1 rotates it counterclockwise by the stopper pin 17 and returns to the original horizontal state when the upper substrate 7 passes through the stopper 15 portion. Then, when the ascending operation is stopped and the display device 1 is going to descend, it is caught by the stopper pin 17 and stopped. FIG. 2 shows this stopped state. After the stop, the operating lever 20 is pushed down against the force of the coil spring 21 to be locked by the locking portion 22, and the stopper pin 17
The rotational force in the direction of the broken line arrow a is applied to. Thus, when the display device 1 is lowered, the airbag 10 is inflated and the upper substrate 7 is once lifted, and then the stopper pin 1
7 is rotated counterclockwise by the rotational force a and is in a released state. Therefore, when the airbag 10 is subsequently contracted, the display device 1 descends.

The airbag 10 has a flat rectangular bellows structure, and three airbag units 10a, 10b, 1 are provided.
It is configured by connecting 0c. Each airbag unit 1
0a, 10b, 10c are joints 24, 24 through an opening 23, 23 formed in the center of the intermediate plate 13, 13.
Are connected by. The size of the airbag unit 10a is such that the planar shape is 16 cm in length and 65 cm in width, and the thickness at maximum air supply is
It is about 7 cm, and when it has a three-tiered bellows structure, the lift is about 20 cm. Therefore, three airbag units 1
The total head of 0a, 10b and 10c is 60 cm.

On the other hand, the pantographs 9a and 9b are constructed in four stages, when the X-shaped portion is one stage. Since the intermediate plates 13, 13 ... Are attached to predetermined positions in each stage, the lift of one stage is equal to the lift of one airbag unit and is about 20 cm. Therefore 4-stage pantograph 9
For a and 9b, the total head is about 80 cm. In this way, by combining the airbag and the pantograph and increasing the number of steps of the pantograph within a range in which the minimum required lifting force is obtained, it is possible to obtain a lift greater than that of the airbag alone. That is, generally speaking of the above relation, when the total number of stages of the pantograph is n, the portion of the number of stages of n-1 or less is expanded by the airbag. The total number of pantograph stages and how many of them are extended by the airbag are determined by the weight applied to the pantograph and the required lift. In the present embodiment, the internal pressure of the airbag can be set to 0.3 kg / cm ² by supplying the exhaust gas of the vehicle, and thus, about 132 kg per airbag unit can be obtained.
The push-up force of 3 is obtained, and a total of 39 levels is achieved with a 3-stage airbag unit.
It can lift a heavy object weighing 6 kg. When this push-up force is converted into the push-up force by the pantographs 9a and 9b having a four-step lift of 80 cm, the value is reduced by 297 kg, but the force is sufficient to raise the display device 1. .

FIG. 4 shows one airbag unit 10b.
And the intermediate plate 13 located above it. As a material for the airbag unit, a flexible sheet having a structure in which a reinforcing cloth is bonded to a rubber sheet or a resin sheet having elasticity can be used. Such sheets must be confidential.
As the rubber material forming the sheet, chloroprene rubber can be used, as the resin material, vinyl chloride resin, polyurethane resin can be used, and as the reinforcing fiber, nylon, polyester, strong rayon, aramid fiber, steel fiber or the like alone or these Complexes can be used. As one specific example, good reinforcement was obtained when a woven fabric composed of nylon fibers (200 to 1200 denier) was used as the core material. The adhesion of each step can be performed by laminating adhesion with an adhesive, welding with high frequency or ultrasonic waves, heat welding, or the like. Further, in order to increase the adhesive strength of the adhesive portion, the adhesive portion may be sewn with the thread 25. The male portion 24a of the joint 24 is attached to the upper opening of the airbag unit 10b thus formed, and the female portion 24b is attached to the lower opening of the airbag unit 10b with screws. The male portion 24a is coupled to the female portion of the upper airbag unit 10a (FIG. 2) through the central opening 23 of the upper intermediate plate 13. Similarly, the female portion 24b passes through the central opening 23 of the lower intermediate plate 13 and the lower airbag 1
0c (FIG. 2) attached to the male part. The joint 24 may be coupled to the airbag unit by using adhesive or high frequency welding instead of screws.

As shown in FIGS. 5 and 6, the joint 24 is composed of a male portion 24a and a female portion 24b, and communication holes 26 and 27 are formed in the center of both. Male part 24a
In the female portion 24b, four projections 28, 28 ..., 29, 29 ... Are formed around the communication holes 26, 27, respectively. When the female portion 24b is pushed into the male portion 24a and is rotated about 45 degrees to the right so that the protrusion 29 of the female portion 24b is also inserted under the protrusion of the male portion 24a, they are firmly coupled. At this time, the female portion 24b is the rubber O-ring 3 provided on the male portion 24a.
Forced elastic contact with 0 to ensure a reliable seal between the two. Reference numerals 31, 31, ... Are small holes into which screws are fitted.

In this embodiment, as shown in FIG. 2, the uppermost airbag unit 10a is not provided with a communication hole in the upper surface thereof, but in order to make it compatible with other airbag units, it is not provided. The male part 2 of the joint 24 on the upper surface
4a may be attached and the structure may be closed by plugging. Further, the airbag unit 10c located at the bottom
The female part 24b of the joint 24 is attached to the lower surface of the, and the male part 24a is attached to approximately the center of the lowermost intermediate plate 13 supporting the airbag unit 10c.
Both can be combined. The lowermost male portion 24 a is connected to the air supply / exhaust pipe 32.

FIGS. 6 and 7 show a state in which the display device 1 and the elevating means 2 are placed at the forefront on the loading platform 34 of the small truck 33 and the display device 1 is lowered (the broken line indicates when it is raised). Position), and the supply / exhaust pipe 32 is the exhaust pipe 3
5 can be detachably connected. Then display device 1
When a predetermined display is performed, the operator starts the engine of the truck 33, connects the exhaust pipe 35 to the pipe 32, supplies the exhaust gas to the airbag 10, and inflates the exhaust gas. As a result, the pantographs 9a and 9b are expanded and the display device 1 is raised. The display device 1 that has been raised to the uppermost stage is fixed by the stopper 15, and then the pipe 32 is connected to the exhaust pipe 3.
Remove from 5 and stop the supply of gas. Airbag 1 here
0 is about 20-30 seconds from reaching its maximum contraction state to its maximum expansion state. Power is supplied to the display device 1 from the battery of the truck 33 or a separately provided power source,
A lighting display is made. When the battery of the truck 33 is used as the power source, the engine is kept running while the lighting is displayed. When a lamp is used for display, an inverter that converts the 12V power supply of the battery into an AC 100V power supply is used. After that, the display is continued until the work such as construction is completed, and when the work is completed, the pipe 32 is connected to the exhaust pipe 35 again, and the exhaust gas is supplied into the airbag 10 through the pipe 32 and inflated. . When the upper substrate 7 is pushed up by the airbag 10, the stopper comes off. When this is confirmed and the pipe 32 is removed from the exhaust pipe 35, the exhaust gas filled in the airbag 10 is pressed and exhausted by the weight of the display device 1 and the like. Along with this, the pantographs 9a and 9b are folded and the display device 1 descends. The power supply to the display device 1 is stopped at the same time as the display ends.

[0029]

According to the present invention, since the air bag is used as the lifting mechanism of the display device, the number of metal components as in the conventional mechanical lifting mechanism is small, maintenance and maintenance are easy, and sand and dust are the mechanism. Problems such as driving failure caused by invading a part are solved.

Further, according to the present invention, since the inflation drive of the air bag is performed by the supply of the exhaust gas of the automobile equipped with the display device, an independent drive source is not required and the structure can be simplified.

Further, according to the present invention, since the display device is placed in a relatively narrow space of the luggage carrier of the automobile and the display device is moved up and down by the expansion and contraction of the airbag, the luggage carrier space is considerably wide. It is possible to secure the vehicle, and the vehicle equipped with the display device can also be used as a vehicle for carrying luggage.

Further, according to the present invention, inflation of the airbag,
Since the pantograph is expanded and contracted by contraction, the horizontal upper substrate is attached to the upper end of the pantograph, and the display device is fixed to this, the display device can be moved vertically and stably.

Further, according to the present invention, since the expansion / contraction force of the airbag is applied to the number of stages of the pantograph which is smaller than the total number of stages, the lift of the pantograph can be set larger than the lift of the airbag.

Further, according to the present invention, the airbag is divided into a plurality of airbag units, and the airbag units are connected to each other through the horizontal intermediate plate at the central opening thereof. The horizontal state is maintained and the connecting portion does not deviate from the central axis. Therefore, there is no risk that the airbag will meander in the horizontal direction when it is inflated or deflated, and meanders to prevent the pantograph from expanding or contracting, or block the communication hole in the airbag to hinder the flow of exhaust gas.

[Brief description of drawings]

FIG. 1 is a perspective view of a display device having a lifting mechanism according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a cross section of a lifting mechanism portion in the embodiment.

FIG. 3 is a perspective view showing a stopper portion in the embodiment.

FIG. 4 is a cross-sectional view showing an airbag unit and an intermediate plate.

FIG. 5 is a perspective view showing a joint.

FIG. 6 is a cross-sectional view showing the joint.

FIG. 7 is a rear view showing a state in which the display device is attached to an automobile.

FIG. 8 is a side view showing a state in which the display device is attached to an automobile.

[Explanation of symbols]

 1 ………… Display device 2 ………… Warning lamp 3 ………… Elevating mechanism 4 ………… Lower substrate 5 ………… Sidewall 6 ………… Rail 7 ………… Upper substrate 8 ………… Rollers 9a, 9b …… ... Pantograph 10 ... Airbags 10a, 10b, 10c ... Airbag unit 12 ... Cross-linking body 13 ... Intermediate plate 15 ... Stopper 17 ... Stopper pin 20 ... Operating lever 23 ... Opening 24 Joint 32 Pipe 33 Small truck 35 Exhaust pipe

Front page continuation (72) Inventor Akira Hagaki 1-8 Yokogawa Shinmachi, Nishi-ku, Hiroshima City Morten Co., Ltd. (72) Inventor Toshikatsu Nishimori 3-6 Minamikanon-cho, Nishi-ku, Hiroshima City Tomowa Kogyo Co., Ltd.

Claims (6)

[Claims] 1. A display device which is attached to a luggage carrier of an automobile via an elevating mechanism, wherein the elevating mechanism has a bellows-like airbag formed of a flexible material having airtightness, The bag is inflated and deflated by supply and exhaust of exhaust gas of the automobile, and is a display device mounted on the automobile. 2. The display device mounted on a vehicle according to claim 1, wherein the elevating mechanism includes a pantograph that is expanded and contracted by expansion and contraction of the airbag. 3. The elevating mechanism includes a lower board placed and fixed on a bed of the automobile, rails formed vertically on the left and right sides of the lower board, and rollers for rolling on the rail. An upper substrate having the side surface and having the display device mounted on the upper side thereof, and one set in the front-rear direction is arranged between the upper substrate and the lower substrate to connect the two, and the upper substrate is moved up and down by expansion and contraction thereof. It is provided with a pantograph to be operated and a stopper for fixing the upper substrate in a raised position, and the airbag is arranged between the pair of pantographs, and expands and contracts to drive the pantograph to expand and contract. A display device mounted on the vehicle according to claim 1 or 2. 4. When the X-shaped portion of the pantograph is counted as one stage and the total number of stages is n, the number of stages of the pantograph to which the inflation and contraction force of the airbag is applied is n.
4. The display device mounted on a vehicle according to claim 2, wherein the display device is set to -1 or less. 5. The lifting mechanism includes a plurality of bridges horizontally bridged in the middle of the set of pantographs and a plurality of intermediate plates horizontally supported by the bridges. 5. The vehicle according to claim 2, wherein the bag is arranged between the uppermost and lowermost intermediate plates of the intermediate plates, and expands and contracts to drive the pantograph to expand and contract. Display device equipped 6. The airbag comprises a plurality of linked airbag units, each airbag unit comprising:
The display device mounted on an automobile according to claim 5, wherein the display device is mounted between the intermediate plates and is connected through an opening formed in a central portion of the intermediate plates.