JP2019094184A - Floor surface structure of pit and vehicular lift device used therein - Google Patents

Abstract

To provide a full flat floor surface structure of a pit, in a plant having the pit.SOLUTION: A floor surface opening part 11 of a pit 10 is closed with a number of pit covers 110 arranged in a width direction so as to be movable, and a wide floor surface for work is secured, and when using vehicular lift devices 200A, 200B stored in the pit 10, a part of a space between arranged pit covers 110 is opened to form an opening part for work, and the vehicular lift devices 200A, 200B are lifted up or down from the opening part for work.SELECTED DRAWING: Figure 4

Description

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

In the maintenance shop of the vehicle, a pit (basement) is made in the basement, and a lift device for the vehicle is installed there, thereby lifting the maintenance vehicle, and at the floor surface opening of the pit, a pit cover, There is a factory that is arranged as a tread board, where maintenance work is performed.

In this type of maintenance shop, when it is not necessary to use the lift device for a vehicle, the lift device for a vehicle may be accommodated in the pit and the floor surface opening of the pit may be closed with a pit cover. It has the advantage of In particular, in areas with high land prices, the cost of land prices can be reduced because the number of plant sites 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 proposed conventionally. For example, there is a method of connecting a large number of pit covers to a caterpillar system to open and close the floor opening of the pits (Patent Documents 1 and 2). However, in the case of the caterpillar structure, in order to secure the storage of the pit cover smoothly in terms of structure, it is necessary to chamfer between the contact surfaces of the adjacent pit covers. As a result, the caterpillar system not only complicates the structure but also has the inevitable problem that a recess is generated between the contact surfaces of the pit covers. In other words, it was difficult to almost complete full flattening of the pit cover array. Furthermore, in the case of a maintenance vehicle such as a large bus or truck, the movement amount of the pit cover is increased, and the work efficiency is reduced accordingly.

JP, 2008-296805, A JP, 2017-001529, A

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

According to the invention of claim 1 of the present invention, in a factory provided with pits, a plurality of pit covers in the width direction movably arranged at the floor surface opening of the pits and the plurality of pit covers can be opened. A pit cover biasing means for biasing and movably installed in a longitudinal direction in the pit, and at the time of opening the pit cover biasing means, at least both adjacent pit covers of any position of the multiple pit covers. Moveable into the pit from the working opening formed between the adjacent pit covers by the pit cover single opening forming means for moving and opening one side and the pit cover single opening forming means The pit floor structure is characterized in that it comprises an apparatus portion and a pit cover that closes the work opening around the work device when the work device installed in the case rises. That.

The invention according to claim 2 of the present invention is characterized in that the pit cover is a member having a substantially U-shaped cross section, the openings of which are arranged downward at the floor opening of the pit. It is in the floor surface structure of the pit of description.

The invention of claim 3 of the present invention is characterized in that the pit cover biasing means is a biasing telescopic cylinder having a telescopic rod. The floor surface structure of a pit according to claim 1 or 2, It is in.

In the invention according to claim 4 of the present invention, the pit cover single opening forming means comprises an opening telescopic cylinder having a telescopic rod movably installed in the longitudinal direction in the pit, and the telescopic rod is adjacent to the telescopic rod. The pit cover according to claim 1, 2 or 3, characterized in that at least one side of the pit cover is locked and moved to form a working opening between the adjacent pit covers. The floor surface structure of the pits.

The invention according to claim 5 of the present invention is the floor surface structure of a pit according to claim 4, characterized in that the telescopic cylinder for opening of the pit cover single opening forming means is installed on the working device side.

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

In the invention according to claim 7 of the present invention, the light emitting portion is arranged at the boundary portion between the plurality of arranged pit covers in the width direction on at least one side of both longitudinal end portions of the floor surface opening of the pits. Further, the work device is provided with a position detection sensor, and a sensor detection target detected by the position detection sensor is provided on the back side of the multiple pit covers, and the floor surface of the pit of the work device When the opening portion is moved in the longitudinal direction, the light emitting unit corresponding to the movement position of the work device is caused to emit light according to a detection signal of the position detection sensor and the sensor detection object. The floor surface structure of the pit according to claim 3, claim 4, claim 5, or claim 6.

The invention according to claim 8 of the present invention is a working apparatus used in the floor surface structure of the pit, wherein the apparatus unit pit cover is assembled in advance. According to the third, fourth, fifth, sixth, or seventh aspect of the present invention, there is provided a lift device for a vehicle.

According to the invention of claim 1 of the present invention, in a factory equipped with pits, when the work device in the pit is not used, the pit opening is blocked by the large number of pit covers. , The factory (work) floor surface excellent in workability is obtained. Further, even when using the working device, only a part of the many pit covers opens, and the working opening around the working device is also closed by the device pit cover, so it is quick and safe. A wide, well-worked factory floor can be obtained. In addition, since the large number of pit covers are simply arranged to be movable at the floor opening of the pits, the structure is simple and the cost can be reduced.

According to the invention of claim 2 of the present invention, the pit cover can be a member having a substantially U-shaped cross section, for example, a steel molded product or an assembled product, so that it can be provided inexpensively.

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

According to the invention of claim 4 of the present invention, since the pit cover single opening forming means is a telescopic cylinder for opening having a telescopic rod, a reliable opening state can be obtained with a simple configuration.

According to the invention of claim 5 of the present invention, the opening telescopic cylinder of the pit cover single opening forming means is installed on the working device side, and a unique mounting means for the opening telescopic cylinder is not necessary. Because there is, it is possible to provide a reliable and inexpensive.

According to the invention of claim 6 of the present invention, since the apparatus unit pit cover 1 is assembled in advance to the working apparatus, and it has a dual-purpose structure that does not require a unique installation means for the apparatus unit pit cover 1 An inexpensive offer is possible.

According to the invention of claim 7 of the present invention, since the light emitting unit corresponding to the movement position of the working device emits light by the position detection sensor, the maintenance worker beforehand recognizes the movement of the working device in the pit and the pit cover portion. The position where the floor surface opening is formed can be known, and high safety can be obtained from the viewpoint of danger prevention.

According to the eighth aspect of the present invention, the work apparatus is a lift apparatus for a vehicle, and the apparatus pit cover is assembled in advance. Can be attached securely.

In the floor surface structure of the pit of the factory concerning the present invention, it is a schematic perspective view showing an example of the state where the lift device for vehicles which is two work devices was raised. BRIEF DESCRIPTION OF THE DRAWINGS It is the 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 made to carry in this. It is the schematic longitudinal cross-sectional view which showed an example of the state which carried in the maintenance vehicle in the floor surface structure of the pit of the factory which concerns on this invention. FIG. 5 is a schematic longitudinal side view showing an example of the state where the maintenance vehicle of FIG. 3 is lifted. FIG. 5 is a partially enlarged vertical side view showing a floor surface structure of a pit in FIG. 4 and a lift device for a vehicle according to the present invention. FIG. 6 is a partially enlarged perspective view showing an example of a pit cover biasing means in FIG. 5; FIG. 6 is a partially enlarged longitudinal side view in FIG. 5; FIG. 8 is a partially enlarged longitudinal rear view in FIG. 7; It is an enlarged perspective view of the principal part which showed the attachment state of the apparatus part pit cover 1 in the lift apparatus for vehicles of this invention. FIG. 6 is a partially enlarged vertical side view showing a state in which a pit cover is opened to form a working opening from the state of FIG. 5; FIG. 11 is a partially enlarged longitudinal side view showing a state in which the lifting device for a vehicle is rising from the work opening of FIG. 10. It is an enlarged perspective view of the principal part which showed the operation state of the apparatus part pit cover 1 in the lift apparatus for vehicles in the state of FIG. FIG. 11 is a partially enlarged longitudinal side view showing a state where the vehicle lift device is lifted from the work opening of FIG. 10. It is an enlarged perspective view of the principal part which showed the operation state of the apparatus part pit cover 1 in the lift apparatus for vehicles in the state of FIG. FIG. 14 is a partially enlarged vertical cross-sectional view showing a contact state between a pit cover of the vehicle lift device and the front and rear pit covers from the state of FIG. 13; FIG. 16 is a partially enlarged vertical side view showing a state in which the vehicle lift device is in the process of being lowered from the state of FIG. 15; FIG. 17 is a partially enlarged longitudinal side view showing a state in which the working opening of the pit cover is closed from the state of FIG. 16;

In FIG. 1, reference numeral 100 denotes a floor surface structure of a pit as an example of the present invention, and 200A and 200B denote a lift device for a vehicle of a working device as an example of the present invention. The floor surface structure 100 of the pit comprises a number of pit covers 110 in the width direction, which are arranged movably in the longitudinal direction of the floor surface opening 11 of the pit 10 of the vehicle maintenance shop. The vehicle lift devices 200A and 200B are working devices installed in the pit 10, and are stored in the pit 10 when not in use, and when in use, as shown in FIG. 1, the wrist post (lifting shaft) The lift cradle 220 is raised to lift a maintenance vehicle C (including all vehicles such as inspection vehicles and painted vehicles) as shown in FIG. The work device in the present invention is not limited to the vehicle lift device 200A, 200B.

In the present embodiment, the pit cover 110 is formed of a steel-made product or an assembly product having the same width and the same thickness (height) and a substantially U-shaped cross section. Then, the U-shaped openings are arranged downward, and are arranged so as to be movable in the longitudinal direction of the floor opening 11 of the pit 10. The movable means of the pit cover 110 is not particularly limited. For example, as shown in FIG. 8, rotating rollers 111 are provided at both ends of the pit cover 110 and provided on the floor surface opening 11 side of the pit 10. The pit cover rail 20 may be rolled. In the present invention, both ends of the pit cover 110 may be in sliding contact with the pit cover rail 20 directly or via shaft shafts provided at both ends. Since the pit cover 110 is forcibly moved by an external force as described later, there is no particular problem even in sliding contact.

The multiple pit covers 110 are, of course, arranged in a thickness (height) that is the same height as the floor surface opening 11 of the pits 10. Therefore, only by arranging a large number of pit covers 110, the portion of the floor surface structure 100 of the pit of the present invention becomes the same as the floor surface height of the factory, and a fully flat floor surface can be obtained. Also, since the chamfering process is not necessary on the surface edge of each pit cover 110 which contacts each other as in the conventional caterpillar pit cover, it is formed vertically, so that it is between the adjacent pit covers 110 and 110. The ideal full-flattening can be obtained without the formation of dents in the surface edge of the. In addition, in the case of a U-shaped cross section, since structurally high strength can be obtained, the member may be thin, weight reduction,
Cost reduction can also be achieved. The pit cover 110 according to the present invention is not limited to a steel product having a substantially U-shaped cross section or an assembled product. The shape or structure is also not particularly limited. It can also be made 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 site (position) differs depending on the vehicle type (wheel length) of the vehicle, so as shown in FIG. Correspondingly, it is movably installed in the longitudinal direction in the pit 10. When the vehicle lift device 200A ascends, it is necessary to form the work opening S of the lift device in the array portion of the many pit cover portions 110 which have been closed so far. That is, as shown in FIG. 10, the work openings S are formed by moving the adjacent pit cover portions 110, 110 respectively back and forth in the longitudinal direction of the pits 10. The present invention is not limited to the configuration in which both pit covers 110, 110 are moved back and forth in forming the working opening S. 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 to a portion where the front wheel of the maintenance vehicle C stops (is located), preferably, an appropriate thickness or a recess in the center It is good to provide some wheel supports 30 and so on. This serves as a mark of the vehicle importer, and an appropriate thickness and a dent or the like give an appropriate shock to the vehicle importer, so that the vehicle importer can be physically informed that the front wheel is in a predetermined position. And smooth delivery is possible.

In the case of the vehicle lift device 200B for the front wheel, basically, any vehicle can be located at the same place, and therefore it is not necessary to move in the longitudinal direction of the pit 10, and it is fixed. For this reason, since it is less necessary to provide the floor surface structure 100 of the pit of the present invention on the side of the vehicle lift apparatus 200B, the corresponding process is omitted. Of course, if necessary, the floor surface structure 100 of the pit of the present invention can be provided on the side of the lift device 200B.

Further, in the vehicle lift device 200A, a clearance is usually generated around the device of the wrist post 210 of the lift pedestal 220 at the time of use (at the time of ascent). Therefore, a dedicated device pit cover (flat cover or the like) 120 is assembled to the vehicle lift device 200A in advance in order to close the gap. In the case of the vehicle lift apparatus 200A, the work openings S are formed by the movement of the adjacent pit cover parts 110, 110, and the wrist post 210 is lifted from here. There is a gap around it. The gap is different depending on the type of the maintenance vehicle C, so the degree of danger is high and it can be said that the gap must be closed by all means. Therefore, if the apparatus pit cover 120 is assembled in advance to the vehicle lift apparatus 200A, the gap is automatically closed by moving the lift apparatus and moving up the wrist post 210 as will be described later. Can. As a result, according to the present invention, it is possible to obtain a fully-flatted plant floor that is wide, safe, and easy to use even when using the lift device. In the case of the present invention, of course, the surface height of the device pit cover 120 is set to be the same as the height of the pit cover 110 and the floor surface height of the factory.

Also in the vehicle lift device 200B, a clearance around the device is generated due to the rise of the wrist post 210 in the portion blocked by the lift pedestal 220. For this reason, as a lift device having the device portion 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 side of the vehicle lift apparatus 200B is also shown as an aspect having an apparatus portion pit cover 120 having the same structure as that of the vehicle lift apparatus 200A. However, in the case of the lift apparatus 200B for vehicles, since it is a fixed type and a moving part like the lift apparatus 200A for vehicles is unnecessary, if it is a lift apparatus which has apparatus part pit cover 120, it will not be limited in particular.

The invention will be described in more detail below. As shown in FIG. 2, before the maintenance vehicle C is carried into the vehicle lift apparatus 200A, 200B, the entire surface of the floor surface opening 11 of the pit 10 is closed by the arrangement of a large number of pit covers 110. The inventive fully flat pit floor structure 100 is formed. Therefore, the vehicle importer can carry in the maintenance vehicle C with confidence.

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 support 30 and stopped. Thereafter, the vehicle lift device 200A in the pit 10 is moved to a predetermined lift position according to the type of the maintenance vehicle C (because the size, that is, the length differs depending on the type of vehicle). Although not shown in the drawings, this movement is performed by a lift controller (a built-in or computer controller such as a computer) for a lift device. The storage unit of the lift controller stores (stores) necessary wheel vehicle type information and the like, and as a preferred example, it is set to be operable by an attached remote controller (remote controller). For example, if the vehicle type of the maintenance vehicle C is determined by the remote control, 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 that lift position. It can be moved automatically. Of course, it can also be done manually.

In the case of the lift apparatus 200A for a vehicle, since it is in the pit 10 closed by many pit covers 110 before use, the maintenance worker can not visually check the storage position. However, from the viewpoint of danger prevention and the like, it is desirable that the maintenance worker previously knows the storage position of the vehicle lift device 200A and the movement position after that. In particular, in the lift position, the adjacent pit cover 110, 110 moves for lifting the lift device, and the maintenance opening S is formed, which is a kind of hole. By all means, it is desirable to know in advance.

For this reason, in the present invention, as shown in FIG. 2, a large number of light emitting portions 130 (light emitting portions 130 (light emitting portions) are provided at both longitudinal edge portions of the floor surface opening 11 of the pits 10 corresponding to the end portions of many pit covers 110. Diodes etc. are arranged. Specifically, they are arranged at the boundary between a large number of arranged pit covers 110 and 110 and in the vicinity thereof. Then, as 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 performed automatically by the lift controller. Thus, the maintenance worker can know in advance the movement position of the vehicle lift device 200A in the pit 10 and the formation position of the work opening S in the floor surface structure 100 of the pit during the work. This provides high security. The arrangement of the large number of light emitting units 130 is not limited to the two longitudinal edge portions of the floor surface opening 11 of the pit 10, and may be on either side. In addition, it is also possible to provide the wireless light emitting unit 130 on the side of the pit cover 110.

FIG. 4 shows a state in which each of the vehicle lift devices 200A, 200B is lifted 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 predetermined maintenance work. At this time, since the floor surface opening 11 of the pit 10 is closed by the floor surface structure 100 of the pit by the large number of pit covers 110 and the device portion pit 120 of each of the vehicle lift devices 200A and 200B Floor surface is formed. Therefore, the maintenance worker can work safely.

In the pit floor structure 100, when a large number of pit covers 110 are closed, it is dangerous if the pit cover 110 is moved (moves) carelessly, so this closed state is surely biased (fixed). Need to be For this reason, according to the present invention, as shown in FIG. 5, pit cover biasing means 140, 140 are provided at the front and back of each of the outermost two pit covers 110, 110 of the pit cover arrangement. In this embodiment, a biasing telescopic cylinder is used, which is installed near the surface of the floor opening 11 of the pit 10, and each telescopic rod 141, 141 is provided on the outermost side of both pit covers 110, It is connected to 110. Specifically, for example, as shown in FIG. 6 (the right end side is omitted in the figure), brackets (attachment members) 142 and 142 for biasing means are provided in the width direction of the pit 10 and biased to this bracket Telescopic cylinder 140 is attached.

By expanding the telescopic rods 141 and 141 of the front and rear pit cover biasing means 140 and 140 in FIG. 5, a large number of pit covers 110 are biased (fixed). On the contrary, if the biasing pressure by the respective pit cover biasing means 140, 140 is solved, the biasing of the many pit covers 110 will be released. By this release, any adjacent pit cover 110, 110 becomes movable, so that the work opening S of the lift device can be formed. The pit cover biasing means 140 is not limited to the biasing telescopic cylinder. For example, it may be an elastic body such as a compressed coil spring or a biasing means by a gas spring described later. Further, the pit cover one biasing 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 by one unit.

Further, in FIG. 5, the vehicle lift apparatus 200A used is basically the same as the normal lift apparatus except for the assembling part of the apparatus unit pit cover 120 which is a component unique to the present invention. It is good. And if this principal part is expanded, it will be like FIG.7 and FIG.8. This point is the same as in the case of the vehicle lift device 200B.

The lift device main body portion 230 of the vehicle lift device 200A includes, for example, a hydraulic unit portion 240 and a frame body frame 250 on which various components are assembled. The lift post 210 of the lift pedestal 220 is mounted to be able to move up and down at the central through portion of the frame 250. As shown in FIG. 6 and FIG. 9, a lift cylinder 211 is attached to the inside of the lift post 210 so that the lift post can be moved up and down.

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

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

At this time, if the telescopic rods 152a, 152a of the telescopic cylinders 152, 152 for locking are extended, as shown in FIG. 10, the telescopic rods 152a, 152a are inside the outline cross section of the pit cover 110 It is possible to lock the edge and move the two adjacent pit covers 110 back and forth to open and form the working opening S. At this time, on the side of the front and rear pit cover single opening forming means 150, 150, a space for receiving at least the moving outermost pit cover 110, 110 is required, so the outermost side pit cover 110, 110 side. As shown in FIG. 1, the end cover panels 121 and 121 for the pit cover which receives this on the bottom side are installed. Of course, in order to fully flatten the floor surface, it is preferable to use a thin thin metal plate as the end cover panel 121. Of course, the present invention is not limited to this metal plate. A pit floor panel 122, 122 covering the top of the pit cover biasing means 140, 140 in the pit 10 on the outer side of the end cover panel 121, 121 (opposite to the outermost pit cover 110, 110). 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. It may be a panel having a U-shaped cross section having the same structure as the pit cover 110. Cost reduction can be achieved by this.

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 also detected. The body 160 is provided, for example, as a sensor bracket (contactor) suspended from the inside of the pit cover 110. Accordingly, the movement (movement) of the vehicle lift device 200A is detected by the functions of the position detection sensor 260 and the sensor detection target 160, and the light emitting unit 130 installed at the both edges of the floor of the pit 10 emits light. It can be done.

Specifically, as a preferred embodiment, as shown in FIG. 5, the center of the lift post 210 of the vehicle lift apparatus 200A (center) is just at the detection position (contact position) of the position detection sensor 260 and the sensor detection object 160. So that the light emitting unit 130 emits light when the boundary between adjacent pit covers 110, 110, ie, when both pit covers 110, 110 are opened and the work opening S is formed. It is set. In addition, these position detection sensors 260 and the sensor to-be-detected body 160 are not limited to the contact-type thing by the proximity sensor or contactor in the aspect of this Embodiment. It is also possible to use a magnetic non-contact type by a magnetic sensor and a sensor magnetic body or an optical type by a light emitting element and a light receiving element. Furthermore, as long as the sensor is capable of detecting the position, a wide range of other sensors can be used. Further, the mounting positions of the position detection sensor and the sensor detection object are not particularly limited. Other configurations and methods are widely included as long as the configuration can detect the formation position of the work opening S.

In this manner, when the lift device moves when using the vehicle lift device 200A, the light emitting unit 130 at a position corresponding to the lift device emits light by the function of the proximity sensor 260. We can know movement position. For example, first, the proximity sensor 260 contacts 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. The 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 the stop position emits light and continues to emit light. By this, of course, the maintenance worker can know timely the moving position of the vehicle lift device 200A in the pit 10 which can not normally be seen. In particular, in the lift position, the adjacent pit cover 110, 110 is opened to form the work opening S for the lift device. By all means, it can be said that you want to know the position. The detection signal of the proximity sensor 260 is processed by the lift controller to set the light emitting unit 130 to emit light.

Furthermore, on the left and right sides in the width direction of the frame 250, as shown in FIG. 9, FIG. 12 and FIG. 14, two U-shaped gas spring brackets fixed to the lift flange member 257. Two gas springs 270 are provided on the left and right, respectively, through 258. The other end (upper end in the figure) of the gas spring 270 is connected to a device pit cover 120 assembled to the frame 250 side. When the lift post 210 of the vehicle lift apparatus 200A is lifted by the gas spring 270, the apparatus pit cover 120 ascends simultaneously with the rise, and finally, as shown in FIG. 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 pit cover 120 is released, the gas spring 270 operates its spring function to push up the device pit cover 120. The elastic force is strong, and the maintenance worker does not usually move even if the maintenance worker rides on the pushed up apparatus pit cover 120 during work. In the present invention, the present invention is not limited to the gas spring 270, and may be replaced by a common ordinary extension cylinder to perform the same operation.

In order to move the two adjacent pit cover portions 110, 110 from the lift position of the vehicle lift device 200A in FIG. 5 to form the work opening S, as shown in FIG. This is performed by driving the forming means 150, 150. That is, first, the telescopic rods 152a, 152a of the telescopic cylinders 152, 152 for locking before and after the pit cover single opening forming means 150, 150 are respectively elongated. As a result, the extended telescopic rods 152a, 152a have such heights as to be locked (hooked) on the downward side wall surfaces of the general cross-sectional U-shape of both pit cover parts 110, 110. From this state, next, if the telescopic rods 151a, 151a of the front and rear opening telescopic cylinders 151, 151 are extended, the adjacent pit cover portions 110, 110 are moved back and forth, and the work opening S is It is formed. In the present embodiment, the downward side wall surface of the general shape of the U-shaped cross section of the pit cover 110 is used as the locking portion, but it is not limited to this. For example, when the pit cover 110 is a flat plate, a protrusion such as a locking piece can be provided on the bottom side to make the locking portion. This is because, in the case where the pit cover 110 has a substantially U-shaped cross section, there is no need to provide a locking portion in particular, and the side wall surface can be used as a locking portion only when facing downward. The cost of the formation of the locking portion can be reduced.

In the case of the present invention, the amount of movement of the pit cover 110 can be extremely small in forming the working opening S. As in the present embodiment, when moving the two pit cover portions 110, 110, the movement amount of each pit cover portion 110, 110 may be half the width of the working opening S. Even when one pit cover 110 is moved, the amount of movement can be the width of the working opening S. This is much smaller than the movement amount of the conventional caterpillar pit cover, which enables quick operation. That is, excellent workability can be obtained.

Thus, when the work opening S is formed, as shown in FIGS. 11 and 13, the vehicle lift device 200A is driven to raise the wrist post 210 and the lift support 220 to a predetermined work position. Let By this, the maintenance vehicle C is lifted. During this operation, as the lift receiver 220 is lifted, the apparatus pit cover 120 is unloaded and opened, so that the gas spring 270 on the frame 250 side works and the apparatus pit cover 120 is In the work opening S, the gap generated around the device is automatically closed. As a result, the maintenance worker is not bothered by the troublesome clearance for the clearance around the apparatus, and the apparatus pit cover 120 and the large number of pit covers 110 are integrated to form the floor surface opening 11 of the pit 10. As a result, the plant floor surface with high safety and workability, wide, and full-flatness can be obtained.

As described above, the gap around the device at the work opening S is automatically closed by the device pit cover 120, but in order to make this state more reliable, FIG. As shown, it is preferable to forcibly press the unit pit cover 120 and the pit covers 110 and 110 before and after contacting the same to integrate them. That is, by driving the front and rear pit cover biasing means 140, 140, ie, slightly expanding the extension rods 141 and 141 of their biasing telescopic cylinders (fine adjustment extension), the front and rear pit cover 110 , 110 are pressed against the front and rear wall surfaces of the apparatus pit cover 120.

When maintenance work is completed on the fully-flattened factory floor, as shown in FIG. 16, the vehicle lift device 200A is lowered by operation of a remote control or the like. Since the telescopic rods 152a and 152a of the telescopic cylinders 152 and 152 for locking before and after the pit cover single opening forming means 150 and 150 are contracted at the time of this descent, the contraction of the telescopic rods 152a and 152a is automatic. Be done. Incidentally, in this descent, the integration by pressing the device cover section 120 shown in FIG. 15 and the pit cover sections 110, 110 before and after coming into contact therewith is naturally released.

Thereafter, as shown in FIG. 17, the front and rear pit cover biasing means 140, 140 are driven, that is, the telescopic rods 141, 141 of the telescopic cylinders for biasing thereof are extended, and each outermost side The work openings S are closed because the pit cover 110, 110 is forcibly moved, and the inner pit cover arrangement groups move together with it. Of course, these operations are also set to be performed automatically. As a result, the floor surface structure 100 of the pit of the present invention is formed, and for the maintenance worker, it is possible to obtain a wide, fully-flatted plant floor surface with high safety and workability.

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

Next, although it is lift apparatus 200A for vehicles of this invention as a working apparatus used with floor surface structure 100 of a pit of this invention, about this lift apparatus, it has already been clarified by the description so far. The description is omitted because there is. Basically, it can be said to have the same structure as a general general lift device except for the assembly portion of the device pit cover 120.

DESCRIPTION OF SYMBOLS 10 ... Pit, 11 ... Floor surface opening part of a pit 100: Floor surface structure of a pit, 110 ... Pit cover 1, 120 ... Equipment part pit cover 1, 130 ... Light emission part, 140: Pit cover one biasing means, 150: pit cover one opening forming means, 200A, 200B: lift device for vehicle, 210: lift post, 220: lift holder, 260: ... Position detection sensor,

Claims (8)

In a factory provided with pits, a plurality of pit covers in the width direction movably arranged at floor openings of the pits, a pit cover biasing means for openably biasing the plurality of pit covers, and A pit cover is installed movably in the longitudinal direction of the pit, and when the pit cover biasing means is opened, at least one of both adjacent pit covers at any position of the multiple pit covers is moved and opened. When the working device installed movable and ascendable in the pit is lifted from the work opening formed between the adjacent pit covers by the opening forming means and the pit cover single opening forming means. A pit floor surface structure comprising an apparatus portion pit cover for closing a work opening around the work device. 2. A pit floor structure according to claim 1, wherein said pit cover is a member having a generally U-shaped cross section, the openings of which are arranged downward at the floor opening of the pit. The pit floor structure according to claim 1 or 2, wherein said pit cover biasing means is a biasing telescopic cylinder having a telescopic rod. The pit cover single opening forming means is an opening telescopic cylinder having a telescopic rod movably installed in a longitudinal direction in the pit, and the telescopic rod is engaged with at least one side of the adjacent pit cover. 4. The floor surface structure of a pit according to claim 1, 2 or 3, wherein a working opening is formed between the two adjacent pit covers. 5. The floor surface structure of a pit according to claim 4, wherein a telescopic cylinder for opening of said pit cover single opening forming means is installed on said working device side. The apparatus unit pit cover is previously assembled to the working device, and is elevated from the working device side to close a working opening around the working device. The floor surface structure of the pit according to claim 3, claim 4 or claim 5. The light emitting portion is arranged at the boundary between the plurality of pit covers arranged in the width direction on at least one side of both longitudinal end portions of the floor surface opening of the pit and position detection is performed on the work device A sensor is provided, and a sensor detection target detected by the position detection sensor is provided on the back side of the large number of pit covers 1. When the work apparatus moves in the longitudinal direction of the floor opening of the pit, The light emitting unit corresponding to the movement position of the work device is caused to emit light according to a detection signal of the position detection sensor and the sensor detection target object, and the second, third, fourth, fourth aspect of the present invention. The floor surface structure of the pit of Claim 5 or Claim 6. In the working apparatus used in the floor surface structure of the pit, the apparatus unit pit cover is assembled in advance, and the apparatus according to claim 1, 2, 3, 4, 5 5. A vehicle lift apparatus according to claim 5, 6 or 7.

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