JP7154056B2 - Pit cover device - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Meeting name: "Banzai Forum 2018" Venue: Banzai Sendai Branch, 2-8-21 Fukumuro, Miyagino-ku, Sendai City, Miyagi Prefecture Date: July 12, 2018 , July 13, 2018” [Publications, etc.] Meeting name: “Banzai Forum 2018” Venue: 6-3-4-41 Atsuta-ku, Nagoya City Date: July 25, 2018 July 26, 2018”

The present invention relates to a pit cover device for covering an upper opening of a pit used for inspection and maintenance of vehicles such as automobiles.

In recent years, in consideration of safety and the environment, the bottom of the vehicle has been lowered to prevent entanglement and noise, making it difficult to inspect and maintain the underside of the vehicle.

For this reason, for example, a maintenance shop is provided with a concave pit that extends in the front-rear direction and is formed by digging the floor surface. By arranging the vehicle on top, for example, by lifting the vehicle with a lift provided in the pit, or by working from the pit, the vehicle can be easily lifted in a short time. You will be able to perform maintenance and inspection of the lower part.

This pit has a structure that incorporates a floor lift (a lift that raises and lowers the floor provided in the pit) and a pit jack / pit lift (a lift that raises and lowers the vehicle) depending on the purpose of use.

Such pits are disclosed, for example, in Patent Document 1.

Japanese Patent Laid-Open No. 10-138886 Fig. 1

The upper opening of the pit is elongated so that it can be used for a vehicle with a long vehicle length. Therefore, for example, as shown in FIGS. 11 and 12, when a vehicle 1 having a long vehicle length enters the pit 2, the upper opening 3 of the pit 2 is blocked by the vehicle 1. However, for example, as shown in FIGS. 13 and 14, when a vehicle 4 with a short vehicle length enters or when no vehicle enters, part or all of the upper opening 3 of the pit 2 is opened. Since it is open, there is a problem that a worker or the like may fall into the upper opening 3 or an object may fall.

As a countermeasure, conventionally, for example, as shown in FIG.

The pit cover device 5 includes front and rear sprockets 6 and 7 provided at the front and rear ends of the pit 2, respectively, and a roller chain 8 engaged with the sprockets 6 and 7 so as to form a loop. It is composed of a plurality of rectangular plate-shaped cover body elements 9 that are freely connected in a linear fashion, and the tip cover body element 9 is fixed to the roller chain 8 .

At one end, for example, the rear end of the pit 2, a storage chamber 10 for each pit body element 9 is formed, and each cover body element 9 is stored in the storage chamber 10. It is formed.

Then, by rotating the sprockets 6 and 7, for example counterclockwise in FIG. is pulled, the cover body elements 9 are pulled out from the storage chamber 10 one by one, and the upper surface opening 3 of the pit 2 is closed from the rear end to a desired front range.

Further, when the sprockets 6 and 7 are rotated clockwise, each cover body element 9 is sequentially stored in the storage chamber 10 .

The left and right ends of each cover body element 9 are guided by rails (not shown) respectively provided at the upper edge of the left and right side walls in the pit 2, for example. The upper surface of the element 9 becomes horizontal and moves in the front-rear direction of the upper surface opening 3 of the pit 2 .

However, since the conventional pit cover device 5 closes the upper opening 3 of the pit 2 from one end, it takes time to cover the entire surface.

Also, unless the vehicle is positioned at the other end of the pit 2 and stopped, the other side of the opening 3 of the pit 2 will open.

Also, depending on the inspection and maintenance device provided in the pit 2, the vehicle cannot be stopped at the other end, and even in such a case, the other side of the pit 2 may be opened.

Moreover, it is necessary to reciprocate the roller chain 8 in the pit 2 from the front end to the rear end.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to enable safe and easy movement of the cover element.

In order to achieve the above object, the pit cover device of the present invention covers the upper opening of a pit extending in the front-rear direction from the rear end of the upper opening of the pit formed on the floor surface toward the front. and a front cover device that closes the upper opening of the pit from the front end of the upper opening of the pit toward the rear , wherein the rear cover device and the front cover device are respectively the a plurality of rectangular plate-like cover body elements that are linearly connected so as to be tiltable and that close the top opening of the pit; The moving means comprises a rack portion extending in the front-rear direction and provided on the lower surface of each cover body element, a front side gear meshable with the rack portion of the cover body element, and adjacent to the cover body element. It is characterized by comprising a rear-side gear that can mesh with the rack portion of the rear-side cover body element, and a rotation driving device that rotates each of the gears .

Further, the rack portions provided on each of the cover body elements are provided on the left and right sides of the cover body element, respectively, and at least one of the front side gear and the rear side gear is provided on the left and right sides of the cover body element. Gears are provided on the left and right sides of the rack so as to engage with each other, and the rotating shafts of the gears provided on the left and right sides are displaced in the front-rear direction by the length of the radius of the gears .

Further, a sensor for detecting contact is provided on at least one of the cover body element at the tip of the rear cover device or the cover body element at the tip of the front cover device .

Further, a control device is provided for controlling the moving means in order to stop the cover body element at the tip of the rear side cover device and the cover body element at the tip of the front side cover device at desired positions. .

In the rack portion, when the adjacent cover body elements are horizontal, the space between the teeth of the end portions of the rack portions of the adjacent cover body elements is formed to be the same as the space between the teeth of each of the cover body elements. characterized by

In addition, a pressing member is provided above the cover body element to prevent the cover body element from floating.

Further, a storage chamber for storing the cover element of the rear side cover device is formed behind the moving means of the rear side cover device in the pit, and the storage chamber is formed from the moving means of the front side cover device in the pit. A storage chamber for storing the cover body element of the front side cover device is formed on the front side .

According to the pit cover device of the present invention, it becomes possible to open or close the required portion of the upper surface opening 3 regardless of the length of the vehicle entering the pit or the stopping position.

1 is a schematic longitudinal sectional side view for explaining a pit cover device of the present invention; FIG. FIG. 4 is a longitudinal sectional side view for explaining the rear side cover device of the pit cover device of the present invention; 1 is a block diagram of a pit cover device of the present invention; FIG. FIG. 4 is a schematic side view for explaining the rear side cover device of the pit cover device of the present invention; FIG. 4 is an explanatory bottom view of the cover body element of the pit cover device of the present invention; FIG. 4 is an explanatory bottom view of the cover element and gears of the pit cover device of the present invention; FIG. 4 is an explanatory side view of a cover body element and gears of the pit cover device of the present invention; FIG. 2 is an explanatory longitudinal side view of the pit cover device of the present invention; FIG. 3 is another explanatory longitudinal side view of the pit cover device of the present invention; FIG. 11 is a vertical cross-sectional view for still another explanation of the pit cover device of the present invention; It is a vertical side view for description of a conventional pit and a vehicle. FIG. 12 is a plan view of FIG. 11; FIG. 10 is a longitudinal sectional side view for explaining a conventional pit and another vehicle; FIG. 14 is a plan view of FIG. 13; It is a longitudinal side view of a conventional pit cover device.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 10. FIG.

1. Description of the pit cover device

The pit cover device of the present invention, as shown in FIGS. 1 to 3, is a rear cover device that closes the upper opening 3 of the pit 2 from the rear end of the upper opening 3 of the pit 2 toward the front. 11, a front cover device 12 that closes the top opening 3 of the pit 2 from the front end of the top opening 3 of the pit 2 toward the rear, and a control that controls the rear cover device 11 and the front cover device 12. and a device 13 .

2. Description of the rear cover device 11

The rear cover device 11 is, for example, as shown in FIGS. 1 and 2, a plurality of rectangular plate-like cover bodies which are linearly connected to each other so as to be tiltable and which cover the upper opening 3 of the pit 2. element 14, moving means 15 fixedly provided behind the pit 2 for moving each cover element 14 along the front-rear direction of the upper opening, and the tip of the cover body element 14a at the tip. and a contact sensor 16 provided in the

Each cover body element 14 is stored in a storage chamber 17 formed at the rear end of the pit 2, and the moving means provided in front of the storage chamber 17 moves from the cover body element 14a on the front end side. By 15, it is formed so that it may be pulled out to the upper surface opening part 3 one by one, and the said upper surface opening part 3 may be closed.

As shown in FIG. 4, guide shafts 18 project from the front and rear of the left and right side surfaces of each of the cover body elements 14. Each of them is engaged with a rail (not shown) formed along the front-rear direction on the upper end edge, and is provided so as to be movable along the front-rear direction of the upper surface opening 3 .

Further, as shown in FIG. 4, for example, among the linearly connected cover body elements 14, the guide shafts 18a in front and rear of each cover body element 14b in a desired number such as every third cover body element 14b are arranged. The length of either one of the guide shafts 18a is formed longer than the length of the guide shafts 18 of the other cover body elements 14, and the long guide shafts 18a are formed on the left and right side walls in the storage chamber 17 along the front-rear direction. Storage chamber rails (not shown) are provided that engage only with the shaft 18a so that the desired number of cover body elements 14 can be folded and stored.

In addition, since the cover elements 14 at the upper and lower ends of the storage room rails that are to be folded are largely swiveled and folded when the cover is opened and closed, the storage room rails are provided so as to incline downward toward the rear, thereby ensuring clearance. Preferably, when the cover body element 14 is turned, interference with the housed cover body element 14 is avoided, and noise can be reduced.

3. Description of transportation

For example, as shown in FIGS. 2 and 5 to 7, the moving means 15 includes rack portions 19a and 19b extending in the front-rear direction on the left and right sides of the lower surface of each of the cover body elements 14, and the left and right rack portions 19a and 19b. Front side gears 20a and 20b that can mesh with the portions 19a and 19b, respectively, and rear side gears that can mesh with the left and right rack portions 19a and 19b on the rear side adjacent to the cover body element 14, respectively. 21a and 21b and a rotation drive device 22 for rotating each gear rotates the gears to move the meshed cover body element 14 and push out the cover body element 14 ahead of it. , the upper surface opening 3 is closed, or the front cover body element 14 is pulled so as to be stored in the storage chamber 17 .

Further, in the rack portions 19a and 19b, when the adjacent cover body elements 14 and 14 are horizontal, the adjacent tooth spacing α at the ends of the rack portions of the adjacent cover body elements 14 and 14 is the above-mentioned It is formed to be the same as the tooth spacing β of each cover element 14 . As a result, each gear meshes smoothly with the rack portion of the adjacent cover body element 14 .

The rotation shafts of the left and right front gears 20a and 20b may be coaxial, but in order to prevent tooth jumping, for example, the axial positions may be shifted in the front-rear direction by the length of the radius of the sprocket (gear). It is preferable to displace and provide.

Further, the rotation shafts of the left and right rear gears 21a and 21b may be coaxial, but in order to prevent tooth jumping, for example, the shafts may be rotated in the longitudinal direction by the length of the radius of the sprocket (gear). It is preferable to displace and provide.

Either one of the gears 21a and 21b on the rear side or the gears 20a and 20b on the front side may be omitted. Therefore, it is preferable to have front and rear gears.

Further, as shown in FIG. 2, the pit 2 is provided, for example, slightly above the cover body element 14 in a portion located above the gear to prevent the cover body element 14 from floating and to reduce the driving force. A pressing tool such as a plate-like pressing plate 23 is provided to prevent escape.

The gap between the cover body element 14 and the pressing plate 23 is preferably set to be narrower than the height of the teeth of the gear, but is not limited to this. 14 and the pressing plate 23 may be in contact with each other.

Also, the pressing member 23 may be made of an elastic member so as to be deformable.

Further, for example, the moving means 15 may be provided with a position detecting device 23 such as an encoder so as to detect the position of the cover body element 14a at the tip.
4. Description of the front cover device 12

As shown in FIG. 2, the front side cover device 12 is constructed symmetrically with the rear side cover device 11, and a description thereof will be omitted.

5. Explanation of actions and effects

When there is no vehicle, the top opening 3 of the pit 2 is closed by cover elements 14 of the front cover device 11 and the rear cover device 12, for example, as shown in FIG. .

Then, the vehicle is made to enter the pit.

Then, an operator manually moves the cover body elements 14 by using an operation device 24 such as a remote control provided in the control device 13, so that the necessary open the appropriate part and let it work.

By using an input device 25 such as a personal computer, the operator inputs a portion to be opened to the input device, and the control device 13 controls the cover body element 14 at the tip of the rear cover device 11 and the The moving means 15 may be controlled so as to stop the cover element 14 at the tip of the front cover device 12 at a desired position.

After the work, the operator manually operates a remote control or the like to move the cover body element 14 so as to cover the entire surface of the upper opening 3, or input to the input device 25. Alternatively, the control means 13 may control the moving means 15 to automatically close the top opening 3 .

At this time, the position of the cover body element 14a at the tip may be detected by the position detection device 23, and may cover the entire surface of the upper opening 3, or when the contact sensors 16 come into contact with each other, The movement of the cover body element 14 may be stopped.

The contact sensor 16 may be provided on either the rear cover device 11 or the front cover device 12 .

Also, if a position detection device is provided, the contact sensor may be omitted.

According to the present invention, it becomes possible to open or close the required portion of the upper surface opening 3 regardless of the length of the vehicle entering the pit or the stopping position.

In addition, when covering the entire surface of the upper surface opening 3, for example, as shown in FIG. The front side of the opening 3 may be brought into contact with the opening 3 to block it.

Accordingly, since it is not necessary to specify the position to be closed by the front and rear cover devices, the entire surface of the upper surface opening can be easily and quickly closed.

Moreover, it is not necessary to reciprocate the roller chain as in the conventional art.

INDUSTRIAL APPLICABILITY The pit cover device of the present invention is used in vehicle inspection and maintenance shops, vehicle maintenance shops, and the like.

1 long vehicle 2 pit 3 top opening 4 short vehicle 5 pit cover device 6 sprocket 7 sprocket 8 roller chain 9 cover body element 10 storage compartment 11 rear side cover device 12 front side cover device 13 control device 14 cover body element 14a cover body element 14b cover body element 15 moving means 16 contact sensor 17 storage chamber 18 guide shaft 18a guide shaft 19a rack portion 19b rack portion 20a gear 20b gear 21a gear 21b gear 22 rotation drive device 23 position detection device 24 operation device 25 input device

Claims (7)

a rear cover device for closing the upper opening of the pit formed in the floor surface and extending in the front-rear direction from the rear end of the upper opening of the pit;
A front side cover device for covering the upper opening of the pit from the front end of the upper opening of the pit toward the rear,
The rear side cover device and the front side cover device each include a plurality of rectangular plate-like cover body elements which are linearly connected so as to be tiltable, and which cover the upper surface opening of the pit, and each of the cover body elements, moving means for moving the top opening in the front-rear direction;
The moving means includes a rack portion extending in the front-rear direction provided on the lower surface of each of the cover body elements, a front side gear meshable with the rack portion of the cover body element, and a rear side adjacent to the cover body element. A pit cover device comprising: a rear side gear meshable with a rack portion of a cover body element of the above; and a rotation driving device for rotating each gear. the rack portions provided on each of the cover body elements are provided on the left and right sides of the cover body element, respectively;
At least one of the front side gear and the rear side gear is provided on the left and right so as to mesh with the left and right rack portions of the cover body element, respectively,
2. The pit cover device according to claim 1, wherein the rotating shafts of the left and right gears are offset in the longitudinal direction by the length of the radius of the gears. 3. The sensor according to claim 1, wherein at least one of the cover element at the tip of the rear cover device and the cover element at the tip of the front cover device is provided with a sensor for detecting contact. Pit cover device. 3. A control device for controlling said moving means is provided in order to stop the cover body element at the tip of said rear side cover device and the cover body element at the tip of said front side cover device at a desired position. 4. The pit cover device according to any one of 1 to 3. In the rack portion, when the adjacent cover body elements are horizontal, the space between the teeth of the end portions of the rack portions of the adjacent cover body elements is formed to be the same as the space between the teeth of each of the cover body elements. The pit cover device according to any one of claims 1 to 4, characterized by: 6. The pit cover device according to claim 1, further comprising a retainer provided above the cover body element for preventing the cover body element from rising. a storage chamber for storing the cover element of the rear cover device is formed in the pit behind the moving means of the rear cover device;
7. The pit according to any one of claims 1 to 6, wherein a storage chamber for storing the cover element of the front cover device is formed in front of the moving means of the front cover device in the pit. cover device.

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