JPH0986265A - Opening and closing device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] Automatically opening and closing a tank opening in a vehicle in which anti-freezing chemicals are sprayed by a seat without manual labor, thereby ensuring efficiency of opening and closing work and ensuring safety when opening and closing. . A rectangular opening 5 at the upper end of a drug storage tank 3 is opened and closed with a waterproof sheet 6. This sheet 6
A plurality of seat mounting bars that can be moved forward and backward with the forward and backward movements of the chains 16 and 16 that are disposed at the left and right opposing portions of the opening 5 and are revolving are attached. The seat opens and closes the opening 5 by the forward and reverse rotations of the chain.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for opening and closing an opening, and for example, a sheet is used to open the opening of a storage tank for the chemical in a vehicle for spraying the chemical to prevent road surface from freezing in a snowy area. The present invention relates to a device for opening and closing an opening used for opening and closing.

[0002]

2. Description of the Related Art In order to prevent freezing of a road surface in a snowfall area, a salt-based antifreezing agent is sprayed.

A vehicle for this purpose, for example, as shown in FIG. 19, is provided with a tank a for containing the medicine, and is constituted so that the contained medicine is sprayed on the road surface by a spraying device. Then, after the chemicals are stored in the tank a, the opening b is formed in order to prevent snow and rain from entering the tank.
Is covered with a sheet c, and a rubber tension band d attached to the edge of the sheet is elastically stretched on a hook-shaped engaging piece e protruding from the upper edge of the tank a. The edge portion of the sheet c was fixed to the tank a.

By the way, in order to cover the opening b of the tank with the sheet c, it is necessary for an operator to work at a high place by climbing on the tank and spreading and covering the sheet. Further, the above-mentioned work of hooking the tension band d on the engagement projection e is performed, for example, as shown in FIG. 20, when the worker f rides on the tank a and keeps the forward leaning posture. This is done by gripping the end portion with a hand, extending it, and hooking it on the engaging projection piece e.
Alternatively, as shown in FIG. 21, the worker f rides on the footrest part g of the vehicle, holds the support rod h on the side of the tank with one hand and grips the end of the tension band d with the other hand. Was extended and hooked on the engaging protrusion e.

Further, when replenishing the medicine in the tank, it is necessary to take the same posture as described above, remove the tension band from the engaging projection, and remove the sheet from the tank to open the opening of the tank. However, after replenishment, the work of covering the sheet and hanging the tension band on the engaging protrusion is required in the same manner as described above.

[0006]

This type of chemical spraying vehicle is for working in a low temperature environment in the winter, and may be worked during snowfall or while traveling on a sherbet-like road surface. Many. Therefore, the upper surface i of the tank, the surface of the footrest portion g, and the surface of the support rod h are easily frozen due to the adhesion of snow and splashes.

By the way, as described above, the work of the worker climbing on the tank to expand the sheet c to cover the opening b or the work of hanging the end of the tension band d on the engaging projection e is Since the work at a high position where the upper end height of the tank exceeds 3 m is required and the caution is required, there is a problem that it takes a lot of time to hang the seat.

Not only this, but since these operations were carried out by workers wearing rubber boots and rubber gloves, their feet and hands were very slippery. Therefore, it was very difficult to work while keeping the balance of the whole body including the feet and hands, and a serious accident in which the worker fell due to the imbalance was also caused every year.

[0009]

In order to solve the above problems, the present invention employs the following means. That is, an opening / closing device for an opening according to the present invention (hereinafter referred to as an opening / closing device) is an opening / closing device for opening / closing an opening with a sheet, and a support frame is arranged in parallel to the opposite edge portion of the opening. , Each support frame,
A moving device that is movable in the front-back direction is attached.
A guide rail is provided in the front-rear direction of the support frame, and mounting bars extending across the support frames are arranged in parallel in the front-rear direction of the support frame, and the mounting bar is located at the rear end. As a result, the mounting bar at the front end is attached to both ends of the mounting bar at the front end, and the mounting bar in the middle is attached at the end parts to the moving device. It can be moved in the front-back direction by being guided by the guide rails. Further, the front end side portion of the sheet covering the opening is attached to the front end mounting bar, the rear end side portion of the sheet is attached to the rear end mounting bar, and the intermediate mounting bar is The sheet is attached to the sheet with the gap between the attachment bars set as required when the sheet covers the opening. Further, by the movement of the moving device, the seat closes the opening as the mounting bar at the front end advances, and the seat opens the opening as the mounting bar at the front end retracts. To do.

A more specific configuration of the opening / closing device according to the present invention is that a support frame is arranged in parallel to the opposing edge portions of the opening,
Sprockets are axially supported at the front and rear of each support frame, and a chain is wound around the front and rear sprockets, and the left and right chains are rotated at the same speed in the front-rear direction by a drive device. A guide rail is provided in the front-rear direction of the support frame, and mounting bars extending across the support frames are arranged in parallel in the front-rear direction of the support frame, and the mounting bar is located at the rear end. As a result, the mounting bar at the front end is attached to the opposing portions of the upper running portions of both chains, and the mounting bar at the middle is attached to the mounting bar at the front end. The portions on both end sides are guided by the guide rails so as to be movable in the front-rear direction. Further, the front end side portion of the seat covering the opening is attached to the front end mounting bar, the rear end side portion of the seat is attached to the rear end mounting bar, and the intermediate mounting bar is The sheet is attached to the sheet with the gap between the attachment bars set as required when the sheet covers the opening. Further, as the front end mounting bar moves forward by the circulation of the chain, the seat closes the opening and the seat opens the opening as the front end mounting bar retracts. It is a thing.

In addition to the more specific structure of the opening / closing device according to the present invention, support frames are arranged in parallel at opposite edge portions of the opening, and pulleys are axially supported in front of and behind each support frame, and A belt is wound around the pulley, and the left and right belts are rotated in the front-rear direction at the same speed by the driving device. Further, the support frame is provided with a guide rail in the front-rear direction, and mounting bars laid across the support frames are arranged in parallel in the front-rear direction of the support frame.
The mounting bar located at the rear end consequently attaches to the support frame, and the mounting bar located at the front end attaches both end portions thereof to the opposing portions of the upper running portions of both belts, and the intermediate portion. The mounting bar located at is guided by the guide rails at both ends thereof and is movable in the front-rear direction. Further, the front end side portion of the sheet covering the opening is attached to the front end mounting bar, the rear end side portion of the sheet is attached to the rear end mounting bar, and the intermediate mounting bar is The sheet is attached to the sheet with the gap between the attachment bars set as required when the sheet covers the opening. Further, as the front end mounting bar advances due to the circulation of the chain, the seat closes the opening, and the seat opens the opening as the front end mounting bar retracts. To do.

Other than the more specific configuration of the opening / closing device according to the present invention, support frames are arranged in parallel at the opposite edge portions of the opening, and each support frame is driven by a motor that runs in the front-rear direction. It is equipped with traveling wheels. A guide rail is attached to the support frame in the front-rear direction, and mounting bars extending across the both support frames are arranged side by side in the front-rear direction of the support frame. Is
As a result, the attachment bar is attached to the support frame, and the mounting bars located at the front end are attached to the respective ends of the self-propelled traveling wheel. The part can be guided in the guide rail to be movable in the front-rear direction. Further, the front end side portion of the sheet covering the opening is attached to the front end mounting bar, the rear end side portion of the sheet is attached to the rear end mounting bar, and the intermediate mounting bar is The sheet is attached to the sheet with the gap between the attachment bars set as required when the sheet covers the opening. Then, by the traveling of the self-propelled traveling wheel, the seat closes the opening as the mounting bar at the front end moves forward, and the seat opens the opening as the mounting bar at the front end moves backward. It is characterized by that.

In the above-mentioned opening / closing device, a gap holding piece for keeping the gap between the mounting bars constant when the seat closes the opening of the tank, is a mounting member located at the rearmost part of the mounting bars located in the middle. Except for the relationship between the bar and the mounting bar located at the rear end, it is preferable that one adjacent mounting bar protrudes and a receiving portion that abuts against the tip of the interval holding piece is provided on the other mounting bar. In this case, the tip of the interval holding piece projecting from the mounting bar located at the rearmost position among the mounting bars located in the middle is brought into contact with the rear edge of the opening. When the opening / closing device is provided with the interval holding piece in this way, the receiving portion provided on the rearmost mounting bar among the mounting bars located in the middle is projected forward at the rear edge of the opening. You may comprise so that it may contact | abut with the front-end | tip of a space | interval maintenance projecting piece.

As a result, as the mounting bar at the front end moves backward, the tip of the spacing holding piece comes into contact with the receiving portion in the relationship between the mounting bar at the front end and the leading one of the intermediate mounting bars. . This will push the intermediate mounting bar backwards. Then, the interval holding piece projecting from the intermediate mounting bar comes into contact with the receiving portion of the intermediate mounting bar adjacent thereto, whereby the mounting bar also retracts. This is sequentially repeated and each mounting bar retracts.

Further, in the opening / closing device according to the present invention, the mounting bar located in the middle is provided with brackets protruding from both end portions thereof, and a roller guided by guide rails is provided in front of and behind the bracket. It is good to support.

Further, in the opening / closing device according to the present invention, it is preferable that the mounting bar at the rear end is fixed to the sliding rod of the seat tensioner that can slide in the front-rear direction and is biased rearward by the spring. However, by pre-configuring the rear end mounting bar to slightly advance against the biasing action of the coil spring when the front end mounting bar is positioned at the front portion of the support frame, the seat can be mounted at the front end by It can be tensioned between the bar and the mounting bar at the rear end.

In the opening / closing device according to the present invention, the front end portion of the mounting plate, which is formed to be long in the lengthwise direction of the upper traveling portion of the chain or pulley and whose rear end side portion is fixed to the upper traveling portion, is attached to the front end portion. It is preferable that the mounting bar located at is fixed. However, since the mounting bar at the front end can be made to project slightly forward from the position of the sprocket and pulley located in front, it is possible to cover with the seat including the part slightly forward of the front edge of the opening. The cover of the opening with the sheet can be made more reliable.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. 1 to 3, a tank opening / closing device 1 according to the present invention includes a waterproof sheet 6 for a rectangular opening 5 at an upper end of a drug storage tank 3 in a vehicle 2 for spraying a drug to prevent freezing of a road surface. It is applied to open and close with.

The opening / closing device 1 is composed of an L-shaped steel formed by bending an upper piece 9 at a right angle to the upper end of a side piece 7 at the right and left edge portions of the opening 5 of the storage tank 3. The support frames 10, 10 shown enlarged in FIGS. 8 to 9 are arranged in parallel with their upper pieces 9, 9 facing each other. In addition, in FIG.
The later-described chain 16 is omitted.

As shown in FIG. 9, a rail member 12 is fixed to each of the support frames 10 and 10 on the inner surface of the side piece 7, and a guide rail 11 formed of a ridge is provided upright. ing. Further, as shown in FIGS. 2 to 3 and FIGS. 6 to 7, the sprockets 13 and 13 are axially supported on the outer side of the side piece 7 of the support frame 10 so as to be axially supported.
3, 13 are connected by a rotary connecting shaft 15 (FIGS. 2-3). Then, the chain 16 is attached to the front and rear sprockets 13, 13 and the middle part is the upper and lower chain guides 17,
It is supported and wound by 17. One support frame 10a
On the side, the chain 16 is provided with a drive sprocket 20 fixed to the rotation shaft of a reduction motor (drive device) 19.
And a guide sprocket 21 are interposed between the drive sprocket 20 and the drive sprocket 20. The other chain 16 also revolves in the same direction at the same speed via 15.

The sheet 6 is attached to a mounting bar 25 attached to the support frames 10, 10 as shown by the chain line in FIGS. In the present embodiment, the attachment bar 25 is attached to the attachment bar 25a at the rear end attached to the rear end of the support frame and to the opposing portions of the upper running portions 22, 22 of the left and right chains 16,16. There are three types of mounting bar 25b at the front end and mounting bar 25c located in the middle, and the upper ends of these mounting bars in parallel with each other in the front-back direction of the support frame are on substantially the same horizontal plane.

As shown in FIGS. 2 and 11, the mounting bar 25a at the rear end is arranged so as to traverse both the support frames 10, 10 (in the present embodiment, the support bar 25a is removed behind the support frames). (Arranged by the above) is formed in the shape of a straight rod that is bent in the shape of a mountain in a gentle manner, and the end of the horizontal rod 26 that protrudes outwardly from the support frame is bent downward to form a hanging piece 27. It becomes. As shown in FIG. 14, the mounting bar 25a at the rear end may be fixedly mounted on the upper surface of the rear end portion of the support frame 10, 10 via the leg pieces 28, 28, but in the present embodiment. Is attached to the support frame via the sheet tensioner 29 fixed to the support frames 10 and 10 in order to bring the seat 6 with the opening 5 closed into a stretched state (FIGS. 2 and 6). There is. In the present invention, the result that the mounting bar located at the rear end is attached to the support frame is a concept including both of them.

As shown in FIGS. 11 to 13, the sheet tensioner 29 includes a cylindrical tubular body 31 fixed to the upper surface of the rear end portion of the support frame 10, and a tubular body 31 inside the tubular body 31. At the rear end portion of the insertion piece 32 to be inserted, a rising piece 33 protruding upward is provided.
And a sliding rod 35 provided with. The insertion piece 32 is always biased rearward by a coil spring 36, and in a free state, the rising piece 33 projects backward from the rear end 31a of the tubular body 31 (for example, about 5 cm). Projecting). Further, in order to prevent the sliding rod 35 from rotating, the facing side surfaces 38, 38 of the front end side portion 37 of the insertion piece 32 are formed flat (FIG. 13), and the front end side portion 37 is formed into a cylindrical body. The threaded cap 39 forming the bottom side of 31 is closely inserted into the insertion hole 40 opened in the end surface portion, and the flat opposed side surface portions 38, 38 are engaged with the opposed vertical surfaces 41, 41 of the insertion hole. ing. Further, in FIG. 13, reference numeral 42 is a retaining piece 4 of the sliding rod 35.
2.

The rising piece 33 has the coil spring 36.
You can move forward while compressing. And this rising piece 33
The end of the horizontal bar 26 of the mounting bar 25a at the rear end is fixed to the upper end of the.

The intermediate mounting bar 25c is shown in FIG.
As shown in FIGS. 8 to 9, a horizontal rod 26 that is arranged so as to cross both the support frames 10 and has a straight bar shape bent in a gentle mountain shape in the central portion and projecting outwardly from the support frame. Is bent downward and the hanging pieces 27 are continuously provided. 9 and 16 are provided at portions of the horizontal rod 26 near both ends.
As shown in FIG. 3, a triangular plate-shaped bracket 43 is formed so as to widen downward, and rail fitting grooves 45 capable of traveling on the guide rail 11 are provided on both sides of the lower end side of the bracket 43. The rollers 46, 46 are rotatably supported.

The mounting bar 25b at the front end is shown in FIG.
As shown in FIG. 9, an end portion of a horizontal rod 26 which is arranged so as to cross both supporting frames 10 and 10 and which has a straight rod shape bent in a gentle mountain shape in the central portion and which projects outwardly from the supporting frame. Is bent downward to connect the hanging pieces 27 in series. And
As shown in FIGS. 9 to 10, the rear end side portion 44a of the attachment plate 44 extending in the length direction of the chain is continuously provided to the link plate of the chain at the opposing portions of the upper running portions 22, 22 of the left and right chains. Is fixed to the horizontal fixing piece with screws 44b, and the mounting plates 44, 44 facing left and right
The upper ends of the leg pieces 46, 46 erected on the upper surface of the front end side portion of the horizontal rod 26 are fixed to the both ends of the horizontal rod 26.

Next, the procedure for attaching the seat 6 to each attachment bar will be described. On the back surface of the sheet 6, FIG.
As shown in FIGS. 5 to 16, the mounting bar 25b at the front end is aligned with the mounting bars (see FIG. 2) arranged at equal intervals with the mounting bars 25b positioned at the front of the support frames 10, 10 to attach the mounting pieces. 47 are provided. However, the attachment piece 47
The sheet 6 can be attached to each attachment bar by removably fixing it to the horizontal rod 26 of the corresponding attachment bar with a string.

Further, in order to keep the interval between the mounting bars constant when the opening 5 is opened, the gaps shown in FIGS.
As shown in FIG. The interval holding piece 49 is configured as a bar-shaped protruding piece protruding from the rear end of the lower end of the bracket 43 with respect to the mounting bar 25c located in the middle.
Then, the tip 50 of the spacing holding piece 49a of the intermediate mounting bar located at the rearmost portion is brought into contact with the rear edge portion 51 of the opening, and the spacing holding piece 49a is applied to the other intermediate mounting bars. The tip 50 of 49 is in contact with the receiving portion 52 provided at the front end of the bracket 43. The interval holding piece 49 of the attachment bar 25b at the front end projects rearward of the horizontal rod 26, is bent downward at the tip thereof, and is bent rearward at the lower end of the bent portion to be substantially L-shaped. Tip 5 of the horizontal protrusion 53
5 contacts the receiving portion 52 provided at the front end of the lower end portion of the bracket 43.

Next, the operation of the opening / closing device having such a structure will be described. 3, 7, and 16 show a state in which the sheet 6 is folded and the opening 5 of the tank is opened. In this state, the reduction motor 19 is driven so that the upper traveling portion 22 travels in the forward direction.
Orbit. Accordingly, the mounting bar 25b at the front end fixed to the chain advances. Along with that, the mounting bar 25b at the front end and the intermediate mounting bar 25 at the beginning
The seat portion 6a in the state of being bridged with c1 is shown in FIG.
As shown by the alternate long and short dash line, the leading attachment bar 25c1 advances. Similarly, the intermediate mounting bar advances in sequence, and the mounting bar 25b at the front end is positioned at the front part of the support frame, so that the seat 6 covers the opening 5 as shown in FIG. 2 and is not shown. The reduction motor 19 is stopped by the operation of the sensor.

By the way, as described above, the mounting bar 25a at the rear end opposes the urging action of the coil spring 36, and the mounting bar 25a of FIG.
Since it is configured to be able to move forward by a predetermined distance from the state shown by the solid line in FIG. 2, as shown in FIG. 15, the mounting bar 25a at the rear end is located in the state where the mounting bar 25b at the front end is located at the front part of the support frame. By pre-configuring the seat 6 so that it slightly moves forward against the biasing action of the coil spring, the seat 6 can be mounted on the seat bar 25b at the front end and the mount bar 2 at the rear end.
It is in a tensioned state with 5a.

Of course, as shown in FIG. 14, even if the mounting bar 25a at the rear end is fixed to the support frame 10, the seat 6 is stretched by adjusting the forward position of the mounting bar 25b at the front end as required. However, if the rear end mounting bar 25a is attached to the supporting frames 10, 10 via the sliding rods 35, 35 as described above, the seat can be more reliably and easily stretched. There is an advantage that can be achieved.

Then, as described above, the mounting bar 2 at the front end is
Since 5b is fixed to the front side portion of the mounting plate 44 fixed to the upper running portion 22 of the chain, as shown in FIGS.
As shown in FIG. 10, the mounting bar 25b at the front end can be made to project slightly forward from the position of the sprocket 13a at the front end, and it is possible to cover the part including a part of the front edge of the opening 5 slightly front side with a sheet. It becomes possible, the opening 5 by the seat 6
The coating can be made more reliable.

As a result, as shown in FIGS. 2 and 6, the opening 5 of the tank is closed by the seat 6. From this state, when the opening 5 of the tank is opened as shown in FIG. 3, the reduction motor 19 is reversed. As a result, the upper traveling portion 22 of the chain travels in the rearward direction, and accordingly, the mounting bar 25b at the front end and the mounting bar 25c in the middle are pushed in the rearward direction, and the seat portion 6a between the mounting bars becomes As shown in FIG. 16, it is slackened into a folded state.

In particular, in this embodiment, since the interval holding piece 49 is provided on the mounting bar as described above, when the mounting bar 25b at the front end moves backward, the mounting bar 25
The tip 55 of the L-shaped space holding piece 49 of b is at the top of the middle mounting bar, but the bracket receiving portion 52.
And the intermediate mounting bar 25b is pushed rearward by the spacing holding piece 49. Then, the interval holding pieces 49 projecting from the intermediate mounting bar come into contact with the receiving portions 52 of the adjacent intermediate mounting bars, so that the mounting bar also retracts. This is sequentially repeated and each mounting bar 25 retracts. Then, the gap holding piece 49 of the intermediate mounting bar located at the rear end contacts the rear edge portion 51 of the opening, whereby the opening operation of the opening is completed, and the reduction motor is stopped by the operation of the sensor (not shown).

Other Embodiments Even if a structure in which a belt is wound around a pulley axially supported by a support frame is adopted instead of the above-described structure in which a chain is wound around a sprocket axially supported by a support frame, It can be configured in the same manner as in the above embodiment.

When a chain or a belt is provided on the support frame, these may be provided on the inner surface side of the support frame, contrary to the above.

When the spacing holding piece is provided on the mounting bar, conversely to the above, the spacing holding piece is provided on the rear side of the adjacent mounting bars, and the receiving portion is provided on the front side mounting bar. It may be provided. A receiving portion is provided on the rearmost mounting bar among the mounting bars located in the middle, and the receiving portion abuts on the tip of the spacing maintaining projection projecting forward at the rear edge of the opening. You may comprise so that it may contact.

FIG. 17 shows a motor-driven self-propelled traveling wheel 57 that travels on rails 56 arranged in the length direction of each of the support frames arranged in parallel with the opposite edge portions of the opening.
Is attached to the self-propelled traveling wheels 57, and the other parts of the opening and closing device are the same as those in the above-described embodiment. It is the same. In this case, the traveling of the self-propelled traveling wheel 57 causes the seat to close the opening as the mounting bar 25b at the front end moves forward, and the seat moves to the opening as the mounting bar 25b at the front end retracts. open. In the case of such a configuration, as shown in FIG. 17, in addition to running the wheel 58 having a smooth peripheral surface on the rail 56,
As shown in FIG. 18, the pinion 59 provided on the motor shaft may be meshed with the rack 60 provided on the rail 56.

The opening that is opened and closed by the opening / closing device according to the present invention refers not only to the opening of the accommodating portion such as a tank but also to the opening in general. Further, the opening / closing direction of the opening is not limited to the horizontal direction.

[0040]

The present invention has the following excellent effects. According to the present invention, the opening portion of the tank can be automatically opened and closed without manual operation, and not only the efficiency of opening and closing can be significantly improved as compared with the conventional one, but also safety can be secured without any occurrence of the conventional fall accident. It has a huge advantage.

In particular, when the opening / closing device according to the present invention is provided with the spacing holding piece for keeping the spacing between the mounting bars constant, the rearward movement of the mounting bar at the front end is followed by the backward movement of this mounting bar. It can be done naturally by the sequential abutting of the holding pieces. Further, the space between the mounting bars can be made constant and the opening can be closed, so that the seat is not forcedly folded.

Further, when the opening / closing device according to the present invention includes the sheet tensioner, the mounting bar at the rear end slightly moves against the biasing action of the coil spring in a state where the mounting bar at the front end is located at the front part of the support frame. By being preconfigured to advance, the seat can be reliably tensioned between the front and rear mounting bars.

In the opening / closing device according to the present invention, the front end portion of the mounting plate, which is formed to be long in the lengthwise direction of the upper running portion of the chain or belt and whose rear end side portion is fixed to the upper running portion, has a front end portion. When the mounting bar located at is fixed, the mounting bar at the front end can be made to project slightly forward from the position of the sprocket located in front by the required circulation of the chain or belt. As a result, it is possible to cover the part of the front edge of the opening, which is slightly forward of the front edge, with the sheet, and the covering of the opening with the sheet can be made more reliable.

[Brief description of drawings]

FIG. 1 is a side view showing a case where the opening / closing device of the present invention is applied to a vehicle in which an antifreezing agent is sprayed.

FIG. 2 shows the seat with the tank opening closed.
It is a perspective view explaining the whole composition of the present invention.

FIG. 3 is a perspective view illustrating the overall configuration of the present invention, with the opening of the tank opened as required.

FIG. 4 is a perspective view illustrating a configuration of a front portion of the opening / closing device.

FIG. 5 is a perspective view illustrating a configuration of a rear portion of the opening / closing device.

FIG. 6 is a side view of the present invention showing the seat with the tank opening closed.

FIG. 7 is a side view of the present invention shown with the tank opening open.

FIG. 8 is a cross-sectional view illustrating an opening / closing device.

FIG. 9 is a perspective view illustrating a mounting state of a mounting bar to a support frame.

FIG. 10 is a side view illustrating a configuration of a front portion of the opening / closing device.

FIG. 11 is a perspective view illustrating a mounting state of the mounting bar on the sheet tensioner.

FIG. 12 is a cross-sectional view illustrating the configuration of the sheet upholstery.

FIG. 13 is a perspective view illustrating a configuration of a front end side portion of the seat upholstery.

FIG. 14 is an explanatory diagram for explaining another mounting mode of the mounting bar at the rear end.

FIG. 15 is a partial cross-sectional view illustrating a state in which the seat closes the opening of the tank.

FIG. 16 is a partial cross-sectional view illustrating a state in which the opening of the tank is open.

FIG. 17 is a cross-sectional view illustrating a motor-driven self-propelled traveling wheel.

FIG. 18 is a perspective view illustrating another aspect of the motor-driven self-propelled traveling wheel.

FIG. 19 is a side view showing a closed state of a conventional tank opening in a vehicle in which an antifreezing agent is sprayed.

FIG. 20 is an explanatory diagram illustrating a problem in a conventional work of covering a tank opening with a sheet.

FIG. 21 is an explanatory diagram illustrating a problem of a conventional work of covering a tank opening with a sheet.

[Explanation of symbols]

 1 Opening / closing device 2 Vehicle 3 Storage tank 5 Opening 6 Seat 10 Support frame 11 Guide rail 12 Rail member 13 Sprocket 16 Chain 22 Upper running part 25 Mounting bar 29 Seat tensioner 35 Sliding rod 36 Coil spring 43 Bracket 45 Rail fitting groove 46 Roller 49 Interval Holding Piece 52 Receiving Section 57 Self-propelled Traveling Wheel

Claims (11)

[Claims] 1. An opening / closing device for opening and closing an opening with a seat, wherein support frames are arranged in parallel at opposite edge portions of the opening, and each support frame is movable in the front-back direction thereof. Is attached to the support frame, and guide rails are provided in the front-rear direction of the support frame, and the mounting bars laid across the support frames are arranged in parallel in the front-rear direction of the support frame. As a result, the mounting bar located at the rear end is attached to the support frame, and the mounting bar located at the front end is attached to the opposing portions of both moving devices at the both end portions thereof, and is also located in the middle. The mounting bar is
The portions on both end sides thereof are guided by the guide rails so as to be movable in the front-rear direction, and the portion on the front end side of the seat covering the opening is attached to the mounting bar at the front end and the rear end side of the seat. Is attached to the attachment bar at the rear end, and the attachment bar located in the middle is attached to the seat by setting a gap between the attachment bars as required in a state where the seat covers the opening. The opening is characterized in that the seat closes the opening as the mounting bar at the front end moves forward by the movement of the device, and the seat opens the opening as the mounting bar at the front end retracts. Switchgear. 2. An opening / closing device for opening / closing an opening with a seat, wherein support frames are arranged in parallel at opposite edge portions of the opening, and sprockets are pivotally supported in front of and behind each support frame. At the same time, a chain is wound around the front and rear sprockets, and the left and right chains are made to circulate in the front-rear direction at the same speed by a drive device. Mounting bars that are provided and laid across both support frames are juxtaposed in the front-rear direction of the support frame, and the mounting bar located at the rear end consequently attaches to the support frame and at the front end. The mounting bar located at both ends is attached to opposite parts of the upper running parts of both chains, and the mounting bar located at the middle is guided by the guide rails at both end sides in the front-back direction. Can be moved to Further, the front end side portion of the seat covering the opening is attached to the front end mounting bar, and the rear end side portion of the seat is attached to the rear end mounting bar, and the seating bar located in the middle is attached. Is attached to the seat with the spacing between the mounting bars set as required with the seat covering the opening, and as the mounting bar at the front end advances due to the orbit of the chain, the seat opens the opening. An opening and closing device for an opening, wherein the seat opens the opening as the mounting bar at the front end retracts at the time of closing. 3. An opening / closing device for opening / closing an opening with a seat, wherein support frames are arranged in parallel at opposing edge portions of the opening, and pulleys are pivotally supported in front of and behind each support frame. At the same time, a belt is wound around the front and rear pulleys, and the left and right belts are made to circulate in the front-rear direction at the same speed by the drive device. Further, the support frame is provided with a guide rail in the front-rear direction. Mounting bars that are provided and laid across both support frames are juxtaposed in the front-back direction of the support frame, and the mounting bar located at the rear end consequently attaches to the support frame, The mounting bar located on the upper side of the belt is attached to opposite portions of the upper running portions of both belts, and the mounting bar located in the middle of the mounting bar is guided by the guide rails on both end sides. Can be moved in any direction, and the opening The front end side portion of the seat covering the portion is attached to the front end mounting bar, and the rear end side portion of the seat is attached to the rear end mounting bar. The seats are attached to the seat with the space between the attachment bars set as required in the state where the seats are covered, and the seat closes the opening as the attachment bar at the front end advances due to the orbit of the chain, and the seat is closed. An opening / closing device for a tank, wherein the seat opens the opening as the mounting bar retracts. 4. An opening / closing device for opening and closing an opening with a seat, wherein support frames are arranged in parallel at opposite edge portions of the opening, and each support frame runs in the front-back direction thereof. A motor-driven self-propelled traveling wheel is mounted, and a guide rail is provided in the front and rear direction of the support frame, and a mounting bar laid across the support frames is provided at the front and rear of the support frame. The mounting bars, which are arranged in parallel with each other in the direction, are attached to the support frame as a result, and the mounting bars located at the front end are connected to the self-propelled traveling wheels at their end portions. The mounting bar that is attached and located in the middle can be moved in the front-rear direction by guiding the end portions of the mounting bar to the guide rails, and the front end portion of the seat that covers the opening is the front end. Attached to the mounting bar of the The portion on the rear end side is attached to the attachment bar at the rear end, and the attachment bar located in the middle is attached to the seat with a required interval between the attachment bars when the sheet covers the opening. By the traveling of the self-propelled traveling wheel, the seat closes the opening as the mounting bar at the front end moves forward, and the seat opens the opening as the mounting bar at the front end moves backward. An opening and closing device for opening. 5. The sheet in a state in which the opening is closed,
An interval holding projection for maintaining a constant interval between the mounting bars is provided on one of the adjacent mounting bars except for the relationship between the mounting bar located at the rearmost position and the mounting bar located at the rear end of the mounting bars located in the middle. A receiving portion that is provided on the mounting bar and abuts against the tip of the spacing holding projection is provided on the other mounting bar, and is projected on the mounting bar located at the rearmost position of the intermediate mounting bars. The opening / closing device for an opening according to any one of claims 1 to 4, wherein a tip of the space retaining piece is in contact with a rear edge of the opening. 6. The sheet in a state in which the opening is closed,
An interval holding projection for maintaining a constant interval between the mounting bars is provided on one of the adjacent mounting bars except for the relationship between the mounting bar located at the rearmost position and the mounting bar located at the rear end of the mounting bars located in the middle. The receiving portion, which is provided on the mounting bar and is in contact with the tip of the spacing maintaining projection, is provided on the other mounting bar, and is provided on the mounting bar located at the rearmost position of the intermediate mounting bars. The opening and closing of the opening according to any one of claims 1 to 4, wherein the receiving portion is adapted to come into contact with a front end of a spacing holding projection projecting forward at a rear edge of the opening. apparatus. 7. The mounting bar located in the middle is characterized in that brackets are projectingly provided on both ends of the mounting bar, and rollers guided by guide rails are axially supported in front of and behind the brackets. The opening / closing device for an opening according to any one of claims 1 to 4. 8. A mounting bar located at the rear end is fixed to a sliding rod of a seat tensioner that is slidable in the front-rear direction and is biased rearward by a spring. The sheet with the opening closed is made to be in a state of being stretched between the mounting bar located at the front end and the mounting bar located at the rear end by the method according to any one of claims 1 to 4. Opening and closing device for opening. 9. A mounting bar located at the front end is fixed to a front end side portion of a mounting plate which is formed long in the length direction of the upper running portion of the chain and whose rear end side portion is fixed to the upper running portion. The opening / closing device for an opening according to claim 2. 10. A mounting bar located at a front end is fixed to a front end side portion of a mounting plate which is formed to be long in a length direction of an upper running portion of a belt and whose rear end side portion is fixed to the upper running portion. The opening / closing device for an opening according to claim 3. 11. An opening and closing device for opening and closing a rectangular opening of a tank mounted on a vehicle with a seat, wherein support frames are arranged in parallel at opposite edge portions of the opening, and the support frames are The front and rear sprockets are axially supported, and the front and rear sprockets have a chain wound around them, and the drive device allows the left and right chains to orbit in the front-rear direction at the same speed. , A guide rail is provided in the front-rear direction, and mounting bars that extend across both support frames are juxtaposed in the front-rear direction of the support frame, and the mounting bar located at the rear end is attached to the support frame. At the same time, the mounting bar located at the front end is formed to be long in the length direction of the upper running portions of both chains, and the rear end side portion is attached to the front end side portion of the mounting plate fixed to the upper running portions. And in the middle The mounting bar has brackets protruding from both ends thereof, rollers are pivotally supported in the front and rear of the bracket, and the rollers are guided by the guide rails so that the mounting bar can be moved in the front-rear direction. Further, the front end side portion of the sheet covering the opening is attached to the front end mounting bar, the rear end side portion of the sheet is attached to the rear end mounting bar, and the intermediate mounting bar is The seat is attached to the seat with the spacing between the mounting bars set substantially equal in a state where the seat covers the opening, and the seat closes the opening as the mounting bar at the front end advances due to the circulation of the chain. An opening / closing device for an opening, wherein the seat opens the opening as the mounting bar at the front end moves backward.