JP2019094184A5 - - Google Patents

Description

The floor structure of the pit and the vehicle lift device used for this

The present invention relates to a pit floor structure in a factory provided with a pit, and a vehicle lift device used therefor.

In a vehicle maintenance shop, a pit (basement) is created in the basement, and a vehicle lift device is installed there to lift the maintenance vehicle, and a pit cover is placed in the floor opening of the pit. There is a factory that arranges them as treads and performs maintenance work there.

In this type of maintenance shop, when the vehicle lift device is not in use, the vehicle lift device can be housed in the pit and the floor opening of the pit can be closed with a pit cover, so the factory can be widely used. There is an advantage. In particular, in areas where land prices are high, the factory site can be reduced, so that land price costs can be reduced.

However, on the other hand, there is a problem that the structure for closing the floor opening of the pit tends to be complicated. For this reason, various structures have been conventionally proposed. For example, there is a method of connecting a large number of pit covers in a caterpillar system to open and close the floor opening of the pit (Patent Documents 1 and 2). However, in the caterpillar structure, it is necessary to chamfer between the contact surfaces of the adjacent pit covers in order to ensure smooth storage of the pit covers. As a result, the caterpillar method has an unavoidable problem that not only the structure becomes complicated but also a dent portion is generated between the contact surfaces of the pit covers. In other words, it was difficult to make the pit cover array almost completely flat. Further, in a maintenance vehicle such as a large bus or truck, the amount of movement of the pit cover is large, which causes a problem that the work efficiency is lowered accordingly.

Japanese Unexamined Patent Publication No. 2008-296805 JP-A-2017-001529

The present invention relates to a pit floor structure in which the floor surface is fully flattened in a factory provided with a pit, and a vehicle lift device used in this floor surface structure.

According to the first aspect of the present invention, in a factory provided with pits, a large number of pit covers movably arranged in the floor opening of the pit and a large number of pit covers can be opened. The pit cover urging means and the pit cover urging means are movably installed in the longitudinal direction in the pit, and when the pit cover urging means is opened, at least of two adjacent pit covers at arbitrary positions of the large number of pit covers. It is composed of a pit cover one opening forming means for forming a work opening between the two pit covers by moving one of the pit covers, and is installed so as to be movable and ascending / descending from the work opening into the pit. It is in the floor structure of the pit, which is characterized by raising the working equipment.

The invention of claim 2 of the present invention is in the floor structure of the pit according to claim 1, wherein the device portion pit cover for closing the work opening around the work device is provided.

The invention of claim 3 of the present invention, the Pittokaba one is claim is in shape of a schematic cross section U, characterized in that the opening is a member which is arranged on the floor openings of the pits downwards 1 Or, it is in the floor structure of the pit according to 2 .

The invention of claim 4 of the present invention, the Pittokaba one biasing means, according to claim 1, characterized in that the biasing telescopic cylinder having a telescopic rod, according to claim 2, or claim 3 as claimed pit It is on the floor structure.

According to a fifth aspect of the present invention, the pit cover opening forming means comprises an opening telescopic cylinder having a telescopic rod movably installed in the pit in the longitudinal direction, and the telescopic rod is adjacent to the telescopic rod. Claim 1, claim 2, claim 3, or claim 1, characterized in that a working opening is formed between the two adjacent pit covers by locking and moving the pit cover to at least one side. It is in the floor structure of the pit according to item 4 .

The invention of claim 6 of the present invention is in the floor structure of the pit according to claim 5 , wherein the expansion / contraction cylinder for opening of the pit cover opening forming means is installed on the working device side.

The invention according to claim 7 of the present invention is characterized in that the device unit pit cover is previously assembled to the work device and raised from the work device side to close the work opening around the work device. The floor structure of the pit according to claim 1, claim 2, claim 3, claim 4, claim 5, or claim 6 .

According to the eighth aspect of the present invention, a light emitting portion is arranged at at least one side of both longitudinal edges of the floor opening of the pit at a boundary portion between a large number of arranged pit covers in the width direction. At the same time, a position detection sensor is provided in the work device, and a sensor object detected by the position detection sensor is provided on the back side of the large number of pit covers, and the floor surface of the pit of the work device is provided. Claims 1 and 2 are characterized in that, when the opening is moved in the longitudinal direction, the light emitting portion corresponding to the moving position of the work device is made to emit light by the detection signal between the position detection sensor and the sensor object to be detected. The pit has a floor structure according to claim 3, claim 4, claim 5, claim 6, or claim 7 .

The invention according to claim 9 of the present invention is a working device used in the floor structure of the pit, wherein the pit cover of the device unit is assembled in advance . 3. The vehicle lift device according to claim 4, claim 5, claim 6, claim 7, or claim 8 .

According to the first aspect of the present invention, in a factory provided with a pit, when the work device in the pit is not used, a large number of pit covers block the floor opening of the pit, so that it is safe and wide. , plant (working) floor having excellent workability is obtained, et al. Further , since a large number of pit covers are simply arranged so as to be movable in the floor opening of the pit, the structure is simple and the cost can be reduced.

According to the second aspect of the present invention, since the work opening around the work device is also closed by the device unit pit cover, a factory floor surface that is quick, safe, wide, and excellent in workability can be obtained. ..

According to the third aspect of the present invention, since the pit cover can be a member having a U-shaped cross section, for example, a molded product or an assembled product of a steel material, it can be provided at low cost.

According to the fourth aspect of the present invention, since the pit cover urging means is an urging telescopic cylinder having a telescopic rod, a reliable urging (fixed) state can be obtained with a simple configuration.

According to the fifth aspect of the present invention, since the pit cover opening forming means is an opening telescopic cylinder having a telescopic rod, a reliable opening state can be obtained with a simple configuration.

According to the sixth aspect of the present invention, the expansion / contraction cylinder for opening of the pit cover opening opening forming means is installed on the working device side, and the unique mounting means for the expansion / contraction cylinder for opening is not required. Therefore, it is possible to provide a reliable and inexpensive product.

According to the invention of claim 7 of the present invention, the device unit pit cover is assembled in advance to the working device so that a unique installation means for the device unit pit cover is not required, and thus it is reliable. It can be provided at low cost.

According to the eighth aspect of the present invention, since the light emitting portion corresponding to the moving position of the work device emits light by the position detection sensor, the maintenance worker can move the work device in the pit and the floor in a part of the pit cover in advance. It is possible to know the formation position of the surface opening, and high safety can be obtained from the viewpoint of risk prevention.

According to the ninth aspect of the present invention, since the working device is a vehicle lift device and the device unit pit cover is assembled in advance, the device unit pit cover is synchronized with the operation of the vehicle lift device. Can be reliably attached.

It is a schematic perspective view which showed an example of the state which raised the lift device for a vehicle which is two work devices in the floor structure of the pit of the factory which concerns on this invention. It is a schematic plan view which showed the floor surface structure of the pit of the factory which concerns on this invention, and an example of the maintenance vehicle to carry in this. It is a schematic vertical sectional view which showed an example of the state which the maintenance vehicle was carried into the floor structure of the pit of the factory which concerns on this invention. FIG. 3 is a schematic vertical sectional side view showing an example of a state in which the maintenance vehicle of FIG. 3 is lifted. FIG. 4 is a partially enlarged vertical sectional side view showing a floor structure of a pit in FIG. 4 and a lift device for one vehicle according to the present invention. It is a partially enlarged perspective view which showed an example of the pit cover urging means in FIG. It is a partially enlarged longitudinal side view in FIG. FIG. 7 is a partially enlarged vertical sectional rear view in FIG. 7. It is an enlarged perspective view of the main part which showed the assembled state of the device part pit cover in the lift device for a vehicle of this invention. FIG. 5 is a partially enlarged vertical sectional side view showing a state in which a pit cover is opened to form a working opening from the state of FIG. It is a partially enlarged longitudinal side view of the state which showed the ascending process of the vehicle lift device from the work opening of FIG. FIG. 11 is an enlarged perspective view of a main part showing an operating state of a device unit pit cover in a vehicle lift device in the state of FIG. It is a partially enlarged vertical sectional side view of the state which showed the time of raising of the vehicle lift device from the work opening of FIG. FIG. 13 is an enlarged perspective view of a main part showing an operating state of a device unit pit cover in a vehicle lift device in the state of FIG. 13. From the state of FIG. 13, it is a partially enlarged vertical sectional side view which shows the contact state between the device part pit cover of the vehicle lift device and the front and rear pit covers. It is a partially enlarged longitudinal side view of the state which showed the descending process of the vehicle lift device from the state of FIG. FIG. 16 is a partially enlarged vertical sectional side view showing a state in which the working opening of the pit cover is closed from the state of FIG.

In FIG. 1, 100 is a pit floor structure which is an example of the present invention, and 200A and 200B are vehicle lift devices of a working device which is an example of the present invention. The floor structure 100 of the pit is composed of a large number of pit covers 110 in the width direction arranged so as to be movable in the longitudinal direction of the floor opening 11 of the pit 10 of the vehicle maintenance shop. The vehicle lift devices 200A and 200B are work devices installed in the pit 10, and are housed in the pit 10 when not in use. When in use, the wrist post (elevating shaft) is as shown in FIG. As shown in FIG. 4, the lift cradle 220 of 210 is raised to lift the maintenance vehicle (including all vehicles such as inspection vehicles and painted vehicles) C. The working device in the present invention is not limited to the vehicle lift devices 200A and 200B.

In the present embodiment, the pit cover 110 is composed of a molded product or an assembled product of a steel material having a substantially U-shaped cross section having the same width and the same thickness (height). The U-shaped openings are arranged so as to be movable in the longitudinal direction of the floor opening 11 of the pit 10 with the U-shaped opening facing downward. The movable means of the pit cover 110 is not particularly limited, but for example, as shown in FIG. 8, rotating rollers 111 are provided at both ends of the pit cover 110 and are provided on the floor opening 11 side of the pit 10. It is advisable to transfer to the pit cover rail 20. In the present invention, both ends of the pit cover 110 may be brought into sliding contact with the pit cover rail 20 directly or via shaft shafts provided at both ends. As will be described later, the pit cover 110 is forcibly moved by an external force, so that there is no particular problem in sliding contact.

Of course, the large number of pit covers 110 are set to have the same height (height) as the floor opening 11 of the pit 10 in an arranged state. Therefore, by simply arranging a large number of pit covers 110, the portion of the floor structure 100 of the pit of the present invention becomes the same as the floor height of the factory, and a fully flat floor surface can be obtained. Further, unlike the conventional caterpillar type pit covers, the surface edges of the pit covers 110 that come into contact with each other do not require chamfering and are formed vertically. Therefore, between the adjacent pit covers 110 and 110. Ideal full flattening can be obtained without any dents on the surface edge of the. Further, in the case of a U-shaped cross section, a structurally high-strength material can be obtained, so that the member may be thin, and the weight and cost can be reduced. The pit cover 110 of the present invention is not limited to a molded product or an assembled product of a steel material having a substantially U-shaped cross section. Its shape and structure are also not particularly limited. It can also be composed of a high-strength composite material using reinforced plastic or the like.

The vehicle lift device 200A lifts the rear (rear) of the maintenance vehicle C, and the lifting portion (position) differs depending on the vehicle type (wheel length) of the vehicle. Therefore, as shown in FIG. 3, the maintenance vehicle C is used. Correspondingly, it is installed so as to be movable in the longitudinal direction in the pit 10. When the vehicle lift device 200A is raised, it is necessary to form a working opening S of the lift device in the array portion of a large number of pit covers 110 that have been closed so far. That is, as shown in FIG. 10, the adjacent pit covers 110 and 110 are moved back and forth in the longitudinal direction of the pit 10, respectively, to form the working opening S. In the present invention, the formation of the working opening S is not limited to the configuration in which both the pit covers 110 and 110 are moved back and forth. Only one pit cover 110 may be moved. That is, the form of movement of the pit cover is not particularly limited.

The vehicle lift device 200B lifts the front (front) of the maintenance vehicle, and extends in the width direction at the portion where the front wheel of the maintenance vehicle C stops (positions), preferably having an appropriate thickness or a recessed portion in the center. It is advisable to provide a wheel receiver 30 with such a feature. This serves as a mark for the vehicle unloader, and since the appropriate thickness and dents give the vehicle unloader an appropriate shock, the vehicle unloader should be informed that the front wheels have been set in place. It is possible to carry in smoothly.

In the case of the vehicle lift device 200B for the front wheels, basically any vehicle may be in the same place, so it is not necessary to move the pit 10 in the longitudinal direction, and it is a fixed type. Therefore, since it is less necessary to provide the floor structure 100 of the pit of the present invention on the vehicle lift device 200B side, the corresponding measures are omitted. Of course, if necessary, the floor structure 100 of the pit of the present invention can be provided on the lift device 200B side as well.

Further, in the vehicle lift device 200A, when the lift device 200A is used (when ascending), a gap is usually formed around the device of the wrist post 210 of the lift cradle 220. For this reason, the vehicle lift device 200A is previously assembled with a dedicated device unit pit cover (such as a flat cover) 120 in order to close this gap. In the case of the vehicle lift device 200A, the work opening S is formed by the movement of the adjacent pit covers 110 and 110, and the wrist post 210 rises from the work opening S. Therefore, in the work opening S, the device There is a gap around it. Since the location of this gap differs depending on the vehicle type of the maintenance vehicle C, the risk is high, and it can be said that this gap must be closed by all means. Therefore, if the device unit pit cover 120 is assembled to the vehicle lift device 200A in advance, the gap is automatically closed by moving with the driving of the lift device and the raising of the wrist post 210, as described later. Can be done. As a result, in the present invention, a fully flat factory floor surface that is wide, safe, and has excellent workability can be obtained even when the lift device is used. In the case of the present invention, of course, the surface height of the device unit pit cover 120 is set to be the same as the height of the pit cover 110 and the floor height of the factory.

Also in the vehicle lift device 200B, a gap around the device is created due to the rise of the wrist post 210 in the portion blocked by the lift cradle 220. Therefore, as a lift device having the device unit pit cover 120 having the same structure as that of the vehicle lift device 200A, the gap around the device is automatically closed. In FIG. 1, the vehicle lift device 200B also has a device unit pit cover 120 having the same structure as that of the vehicle lift device 200A. However, in the case of the vehicle lift device 200B, since it is a fixed type and does not require a moving portion such as the vehicle lift device 200A, the lift device is not particularly limited as long as it has the device unit pit cover 120.

Hereinafter, the present invention will be described in more detail. As shown in FIG. 2, before the maintenance vehicle C is brought into the vehicle lift devices 200A and 200B, the entire surface of the floor opening 11 of the pit 10 is closed by the arrangement of a large number of pit covers 110. The floor structure 100 of the full flat pit of the present invention is formed. Therefore, the vehicle importer can bring in the maintenance vehicle C with peace of mind.

FIG. 3 shows a state in which the maintenance vehicle C is carried into a predetermined position. In this state, the front wheel of the maintenance vehicle C is placed on the wheel receiver 30 and stopped. After that, the vehicle lift device 200A in the pit 10 is moved to a predetermined lift position according to the vehicle type of the maintenance vehicle C (because the size, that is, the length differs depending on the vehicle type). Although not shown, this movement is performed by a lift controller (built-in lift control device such as a computer) for the lift device . The storage unit of the lift controller stores (saves) necessary wheel vehicle model information and the like, and as a preferable example, it is set so that it can be operated by an attached remote controller (remote controller). For example, if the vehicle type of the maintenance vehicle C is determined by the remote controller, the lift position corresponding to the vehicle type is calculated by the lift controller from the storage position of the vehicle lift device 200A, and the vehicle lift device 200A is set to the lift position. It can be moved automatically. Of course, it can also be done manually.

In the case of this vehicle lift device 200A, since it is in the pit 10 blocked by a large number of pit covers 110 before use, the maintenance worker cannot visually check the storage position. However, from the viewpoint of preventing danger, it is desirable that the maintenance worker knows the storage position of the vehicle lift device 200A and the subsequent movement position in advance. In particular, at the lift position, both adjacent pit covers 110 and 110 move to form a kind of hole, a work opening S, for raising the lift device. By all means, it is desirable to know in advance.

Therefore, in the present invention, as shown in FIG. 2, a large number of light emitting portions 130 (light emitting) are formed on both edges of the floor opening 11 of the pit 10 corresponding to the ends of the large number of pit covers 110 in the longitudinal direction. Diodes, etc.) are arranged. Specifically, they are arranged at or near the boundary between a large number of arranged pit covers 110 and 110. Then, as will be described later, when the vehicle lift device 200A is moved, the light emitting unit 130 is set to emit light in conjunction with the movement. Of course, this operation is automatically performed by the lift controller.
As a result, the maintenance worker can know in advance the moving position of the vehicle lift device 200A in the pit 10 and the forming position of the working opening S in the floor structure 100 of the pit during the work. This provides high safety. The arrangement of a large number of light emitting units 130 is not limited to both edges in the longitudinal direction of the floor opening 11 of the pit 10, and may be on either side. It is also possible to provide the wireless light emitting unit 130 on the pit cover 110 side.

FIG. 4 shows a state in which the lift devices 200A and 200B for each vehicle are raised to raise the maintenance vehicle C to a predetermined work position. In this state, the maintenance worker enters under the maintenance vehicle C and performs a predetermined maintenance work. At this time, the floor opening 11 of the pit 10 is fully flat because it is blocked by the floor structure 100 of the pit by a large number of pit covers 110 and the device unit pits 120 of the lift devices 200A and 200B for each vehicle. Floor surface is formed. Therefore, the maintenance worker can work safely.

In the floor structure 100 of the pit, when a large number of pit covers 110 are closed, it is dangerous if the pit covers 110 move (move) carelessly. Therefore, this closed state is surely urged (fixed). You need to keep it. Therefore, in the present invention, the outermost pit covers 110 and 110 of the pit cover array are provided with pit cover urging means 140 and 140 in the front and rear as shown in FIG. In the present embodiment, an urging telescopic cylinder is used, which is installed near the surface of the floor opening 11 of the pit 10, and the telescopic rods 141 and 141 on the outermost side of both pit covers 110, respectively. It is connected to 110. Specifically, for example, as shown in FIG. 6 (the right end side is omitted in the drawing), brackets (mounting members) 142 and 142 for urging means are provided in the width direction of the pit 10 and urged to the brackets. Telescopic cylinder 140 for use is attached.

By extending the telescopic rods 141 and 141 of the front and rear pit cover urging means 140 and 140 in FIG. 5, a large number of pit cover 110s are urged (fixed). On the contrary, if the urging pressure by the pit cover urging means 140, 140 is released, the urging of a large number of pit covers 110 is released. By this release, both adjacent pit covers 110 and 110 can be moved, so that the working opening S of the lift device can be formed. The pit cover urging means 140 is not limited to the urging telescopic cylinder. For example, it can be an elastic body such as a compressed coil spring, or can be used as an urging means by a gas spring, which will be described later. Further, the pit cover one urging means 140 is not limited to the case where two front and rear units are used. It is also possible to move one pit cover 110 with one unit.

Further, in FIG. 5, the vehicle lift device 200A used has basically the same configuration as a normal lift device, except for the assembly portion of the device unit pit cover 120, which is a component unique to the present invention. It can be anything. Then, when this main part is enlarged, it is as shown in FIGS. 7 and 8. This point is the same in the case of the vehicle lift device 200B.

The lift device main body 230 of the vehicle lift device 200A includes, for example, a hydraulic unit 240 and a frame frame 250 to which various parts are assembled. The lift post 210 of the lift cradle 220 is mounted on the central penetrating portion of the frame 250 so as to be able to move up and down. As shown in FIGS. 6 and 9, an elevating cylinder 211 is assembled inside the lift post 210 so that the lift post 210 can be elevated and lowered.

As shown in FIG. 8, the frame body 250 is provided with, for example, four traveling wheels 251 mounted on the lift traveling rails 40, 40 provided on both side walls of the pit 10, for example, front, rear, left and right. This is also rotationally driven by a power transmission system such as a transmission motor 252, a transmission chain 253, and sprockets 254 and 255 attached to the frame frame 250. Therefore, if the transmission motor 252 is rotationally driven, the vehicle lift device 200A can be moved in the longitudinal direction of the pit 10. Further, if the lifting cylinder 211 with a built-in lift post is expanded and contracted, the lift post 210 of the vehicle lift device 200A can be freely raised and lowered.

Further, on the upper surface side of the frame body 250, as shown in FIGS. 5, 7 and 8, both pit covers 110 adjacent to each other at arbitrary positions in the front-rear direction (longitudinal direction of the pit 10) and to the left and right. A plurality of pit cover one opening forming means 150 for moving the 110 back and forth to open and form the working opening S are provided. In the present embodiment, specifically, the expansion / contraction cylinder 151 for opening is installed horizontally, and the expansion / contraction cylinder 152 for locking installed vertically is attached to the expansion / contraction rod 151a side of this cylinder. Cylinder. From this configuration, when the telescopic rods 151a and 151a of the front and rear opening telescopic cylinders 151 and 151 are extended, the distance (length) between the telescopic rods 152a and 152a of the front and rear locking telescopic cylinders 152 and 152 is extended. Becomes larger.

At this time, if the telescopic rods 152a, 152a of the locking telescopic cylinders 152, 152 are extended, the telescopic rods 152a, 152a are inside the U-shaped cross section of the pit cover 110, as shown in FIG. By locking to the edge portion, both adjacent pit covers 110 and 110 can be moved back and forth to open and form a working opening S. At this time, on the front and rear pit cover opening forming means 150, 150 side, at least a space for receiving the outermost pit cover 110, 110 to be moved is required, so that the outermost pit cover 110, 110 side is required. The terminal cover panels 121 and 121 for the pit cover that receive this on the bottom surface side are installed as shown in FIG. Of course, in order to make the floor surface fully flat, it is preferable to use a strong and thin metal plate as the end cover panel 121. Of course, the present invention is not limited to this metal plate. On the outside of the terminal cover panels 121 and 121 (opposite the outermost pit covers 110 and 110), the pit floor panels 122 and 122 covering the upper parts of the pit cover urging means 140 and 140 in the pit 10 Has been installed. The pit floor panel 122 is not particularly limited as long as it is a member having the same height as the factory floor surface. A panel having a U-shaped cross section having the same structure as the pit cover 110 may be used. This makes it possible to reduce costs.

Further, as shown in FIGS. 7 and 8, a position detection sensor 260 such as a proximity sensor is installed on the upper surface side of the frame 250, and a sensor detected by the position detection sensor 260 is detected. The body 160 is provided, for example, as a sensor bracket (contactor) suspended from the inside of the pit cover 110. Therefore, the movement (movement) of the vehicle lift device 200A is detected by the functions of the position detection sensor 260 and the sensor object to be detected 160, and the light emitting unit 130 installed on both edges of the floor surface of the pit 10 emits light. Can be made to.

Specifically, as a preferred embodiment, as shown in FIG. 5, at the detection position (contact position) of the position detection sensor 260 and the sensor object to be detected 160, the center (center) of the lift post 210 of the vehicle lift device 200A is exactly. The shaft) causes the light emitting unit 130 to emit light when the boundary portion between the adjacent pit covers 110 and 110, that is, the positions where the work openings S are formed when both pit covers 110 and 110 are opened. It has been set. The position detection sensor 260 and the sensor object 160 are not limited to the contact type using a proximity sensor or a contactor in the present embodiment. A magnetic non-contact type using a magnetic sensor and a sensor magnetic material, an optical type using a light emitting element and a light receiving element, and the like can also be used. Furthermore, other sensors can be widely used as long as the sensor has a function of detecting the position. Further, the mounting position of the position detection sensor and the sensor object to be detected is not particularly limited.
As long as the configuration can detect the formation position of the work opening S, other configurations and methods are also broadly included.

In this way, when the lift device 200A for vehicles is used, if the lift device moves, the light emitting unit 130 at the position corresponding to the lift device emits light by the action of the proximity sensor 260, so that the maintenance worker can use the lift device. You can know the moving position. For example, first, the proximity sensor 260 comes into contact with the sensor bracket 160 of the nearest pit cover 110, and the light emitting unit 130 corresponding to the pit cover 110 emits light, corresponding to the moving position of the lift device. , Another light emitting unit 130 emits light one after another. Finally, since the lift device stops at the lift position, the light emitting unit 130 corresponding to this stop position emits light and continues to emit light. As a result, of course, the maintenance worker can know the moving position of the vehicle lift device 200A in the pit 10 which is originally invisible in a timely manner. In particular, at the lift position, both adjacent pit covers 110 and 110 are opened to form a work opening S for the lift device. Therefore, from the viewpoint of risk prevention, the maintenance worker can use the lift position. By all means, it can be said that this is the position you want to know. The detection signal of the proximity sensor 260 is processed by the lift controller so that the light emitting unit 130 emits light.

Further, on the left and right sides of the frame 250 in the width direction, as shown in FIGS. 9, 12 and 14, two U-shaped gas spring brackets fixed to the lift flange member 257 are used. Two gas springs 270 on each of the left and right sides are provided via 258. The other end (upper end side in the drawing) of the gas spring 270 is connected to the device unit pit cover 120 assembled on the frame 250 side. When the lift post 210 of the vehicle lift device 200A rises due to the gas spring 270, the device section pit cover 120 rises in conjunction with this rise, and finally, as shown in FIG. 14, this device section The surface height of the pit cover 120 is set to be the same as the surface height of the pit cover 110 at the floor opening 11 of the pit 10. When the lift device is driven and the load on the device unit pit cover 120 is released, the gas spring 270 operates the spring function to push up the device unit pit cover 120. Its elastic force is strong, and even if a maintenance worker gets on the pushed-up device unit pit cover 120 during work, it usually does not move. In the present invention, the gas spring 270 is not limited to this, and the same operation can be performed by changing to a normal general telescopic cylinder.

In order to move the adjacent pit covers 110 and 110 from the lift position of the vehicle lift device 200A in FIG. 5 to form the work opening S, as shown in FIG. 10, the front and rear pit covers are opened. This is performed by driving the forming means 150 and 150. That is, first, the telescopic rods 152a and 152a of the locking telescopic cylinders 152 and 152 before and after the pit cover one opening forming means 150 and 150 are extended, respectively. Then, the extended telescopic rods 152a and 152a have a height at which they are locked (hooked) on the downward side wall surface having a U-shaped cross section in the approximate cross section of both pit covers 110 and 110. From this state, if the telescopic rods 151a and 151a of the front and rear opening telescopic cylinders 151 and 151 are extended, the adjacent pit covers 110 and 110 are moved back and forth, and the working opening S is opened. It is formed.
In the present embodiment, the downward side wall surface having a U-shaped cross section of the pit cover 110 is used as the locking portion, but the present invention is not limited to this. For example, when the pit cover 110 is a flat flat plate, a protruding portion such as a locking piece can be provided on the bottom surface side to lock the pit cover 110. This is because when the pit cover 110 has a U-shaped cross section, it is not necessary to provide a locking portion, and the side wall surface thereof can be used as a locking portion only by turning it downward. The cost of forming the locking portion can be reduced.

In the case of the present invention, the amount of movement of the pit cover 110 is extremely small in forming the working opening S. When moving the two pit covers 110 and 110 as in the present embodiment, the amount of movement of the pit covers 110 and 110 may be half the width of the working opening S. Even when one pit cover 110 is moved, the amount of movement is sufficient for the work opening S width. This is significantly smaller than the amount of movement of the conventional caterpillar type pit cover, and quick operation is possible. That is, excellent workability can be obtained.

After the work opening S is formed in this way, as shown in FIGS. 11 and 13, the vehicle lift device 200A is driven to raise the wrist post 210 and the lift cradle 220 to a predetermined work position. Let me. As a result, the maintenance vehicle C is lifted. During this operation, as the lift pedestal 220 rises, the device unit pit cover 120 becomes unloaded and is released, so that the gas spring 270 on the frame 250 side operates and the device unit pit cover 120 is moved. In the work opening S, the gap generated around the device is automatically closed. As a result, the maintenance worker does not have to worry about eliminating the troublesome gap around the device, and the device unit pit cover 120 and a large number of pit covers 110 are integrated to form the floor opening 11 of the pit 10. It will be blocked, and a wide, fully flat factory floor will be obtained with high safety and workability.

In this way, the gap around the device in the work opening S is automatically closed by the device unit pit cover 120. In order to make this state more reliable, FIG. 15 shows. As shown, it is preferable to forcibly press the device unit pit cover 120 and the pit covers 110 and 110 before and after contact with the device unit pit cover 120 to integrate them. That is, the front and rear pit cover urging means 140 and 140 are driven, that is, the telescopic rods 141 and 141 of the telescopic cylinders for urging them are slightly extended (fine-adjusted extension) to extend the front and rear pit covers 110. , 110 is pressed against the front and rear wall surfaces of the device unit pit cover 120.

When the maintenance work is completed on the fully flattened factory floor surface, as shown in FIG. 16, the vehicle lift device 200A is lowered by operating a remote controller or the like. At the time of this descent, the telescopic rods 152a and 152a of the telescopic cylinders 152 and 152 for locking before and after the pit cover opening forming means 150 and 150 are set to be contracted, so that the telescopic rods 152a and 152a are automatically contracted. Is done. In this descent, the integration of the device unit pit cover 120 shown in FIG. 15 and the pit covers 110 and 110 before and after the contact with the pit cover 120 by pressing is naturally released.

After that, as shown in FIG. 17, the front and rear pit cover one urging means 140, 140 are driven, that is, the telescopic rods 141, 141 of the telescopic cylinders for urging them are extended, and the outermost ones thereof. Both the pit cover 110 and 110 are forcibly moved, and the inner pit cover array group moves together with the movement, so that the work opening S is closed. Of course, these operations are also set to be performed automatically. As a result, the floor structure 100 of the pit of the present invention is formed, and a factory floor surface that is highly safe and workable for maintenance workers and is wide and fully flat can be obtained.

In the pit floor structure 100 of the present invention, in the present embodiment, there is only one vehicle lift device 200A, but the present invention is not limited to this. The number can be increased if necessary. If the maintenance vehicle C is a large bus or truck, the number of maintenance vehicles C may be two. This enables stable lifting.

Next, the vehicle lift device 200A of the present invention as a working device used in the floor structure 100 of the pit of the present invention has already been clarified by the above description. Therefore, the description thereof will be omitted. Basically, it can be said that the structure is the same as that of a normal general lift device except for the assembled portion of the device section pit cover 120.

10 ... Pit, 11 ... Pit floor opening, 100 ... Pit floor structure, 110 ... Pit cover 1, 120 ... Equipment pit cover, 130 ... Light emitting part, 140 ... Pit cover one urging means, 150 ... Pit cover one opening forming means, 200A, 200B ... Vehicle lift device, 210 ... Lift post, 220 ... Lift cradle 260 ... Position detection sensor,

Claims (9)

In a factory equipped with pits, a large number of pit covers in the width direction arranged so as to be movable in the floor opening of the pit, a pit cover urging means for urging the large number of pit covers so as to be open, and the above. It is installed so as to be movable in the longitudinal direction in the pit, and when the pit cover urging means is opened, at least one of the adjacent pit covers at arbitrary positions of the large number of pit covers is moved to move both pit covers. It consists of a Pittokaba first opening forming means for forming a work opening portion ken, from the working opening, movable in the pit, and is characterized by raising the vertically movable installed working apparatus Floor structure of the pit. The floor structure of a pit according to claim 1, further comprising a device unit pit cover that closes a work opening around the work device when the work device is raised . The floor of the pit according to claim 1 or 2 , wherein the pit cover is a member having a substantially U-shaped cross section and the openings thereof are arranged downward in the floor opening of the pit. Surface structure. The floor structure of the pit according to claim 1, 2, or 3, wherein the pit cover urging means is a telescopic cylinder for urging having a telescopic rod. The pit cover opening forming means comprises an opening telescopic cylinder having a telescopic rod movably installed in the pit in the longitudinal direction, and the telescopic rod is locked to at least one side of the adjacent pit cover. The floor structure of the pit according to claim 1, claim 2, claim 3, or claim 4 , characterized in that a working opening is formed between the two adjacent pit covers. The floor structure of the pit according to claim 5 , wherein the expansion / contraction cylinder for opening of the pit cover opening forming means is installed on the working device side. Claims 1, 2 and 2, wherein the device unit pit cover is previously assembled to the work device and raised from the work device side to close a work opening around the work device. 3. The floor structure of the pit according to claim 4, claim 5, or claim 6 . A light emitting portion is arranged at a boundary portion between a large number of arranged pit covers in the width direction on at least one side of both edges in the longitudinal direction of the floor opening of the pit, and a position is detected in the working apparatus. When a sensor is provided and a sensor object to be detected by the position detection sensor is provided on the back side of the large number of pit covers, the work device is moved in the longitudinal direction of the floor opening of the pit. The first, second, third, and fourth claims, wherein the light emitting unit corresponding to the moving position of the work device is made to emit light by the detection signal between the position detection sensor and the sensor object to be detected. The floor structure of the pit according to claim 5, claim 7, or claim 7 . A work device used in the floor structure of the pit, wherein the device unit pit cover is pre-assembled , claim 1, claim 2, claim 3, claim 4, claim 4. 5. The vehicle lift device according to claim 6, claim 7, or claim 8 .