JPS5854477Y2 - Four-post lift with lifting device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a vehicle lifting device for a four-post lift used in automobile maintenance, and is a simple operation that allows the vehicle to be raised again with the car body supported by the lifting power of the four-post lift itself. The purpose of the present invention is to provide a vehicle lifting device with good performance.

As shown in FIG. 15, the conventional four-post lift is provided with an elevating frame 30 that is locked to a lifting device between the four opposing left and right columns 1.1 of the front, rear, left and right columns.
Two step frames 31 (inside and outside) are bridged between both lifting frames 30, and a step plate 32 is stretched over the step frames 31 to form a step part 33,
In the case of car maintenance, the step part 33 was lowered to the work floor, the car was moved onto the step plate 32, and then the step part 33 was raised to the required height to perform maintenance on the underside of the car body. Since the wheels are always in contact with the step plate 32 and supported by the tires, it is necessary to maintain the wheels, axles, etc., and in order to lift the wheels into the air, a separate lifting support device for the car body is required. there were.

One method is to place the car on the step plate 32, then install an auxiliary frame between the left and right columns 1, 1 on the lifting frame 30 of the four-post lift, and then attach the step frame to the auxiliary frame. After a vehicle holding frame having sufficient strength to hold the vehicle body is bridged under the vehicle body in the longitudinal direction which is the same direction as 31, the step portion 33 is raised to a required height and the auxiliary frame is held at that position. , the step part 33 is lowered again, and the auxiliary frame and the step frame 31 are separated vertically, so that the vehicle body is supported by the vehicle holding frame, the tires and the step plate 32 are separated, and the vehicle of the motor vehicle is There were devices that supported the car body instead of tire support, and there were also devices that installed support columns on the left and right that had separate power sources outside of the four-post lift columns to support and levitate the vehicle body, but none of them were easy to use and operate. They are difficult to handle, and when these support devices are used, the vehicle holding frame obstructs the vehicle's view, making it difficult for workers to approach, limiting the work space and scope of work. Was.

The present invention provides a four-post lift that does not have the above-mentioned drawbacks, and it is easy to use and operate by using a vehicle lifting shaft device that can utilize the lifting power of the four-post lift itself and use the other floor as a support and reaction surface. This is intended to improve work space, use range, and field of view, and its configuration will be explained below with reference to the drawings.

As shown in FIG. 1, in the present invention, an elevating frame 2, which is locked to an elevating device, is provided between the four opposing left and right supports 1.1 of the front, rear, left and right supports. The structure in which two step frames 4, an inner and an outer one, are bridged between the two elevating frames 2 as a step part 3, and a step plate 5 is stretched thereon is substantially the same as that of the conventional one.

In the present invention, it is further possible to set the step part 3 at multiple positions (four positions in the illustrated example) during use.
A lifting device 6 is provided to lift and support the vehicle, which can be stored when not in use.

The lifting device 6 has a shaft 9 formed at its upper end with a lifting body 8 that abuts against and lifts and supports the vehicle body 7, and supports the shaft 9 in the set position as shown in FIGS. 2 and 3. The shaft pin 10 transmits the lifting load of the vehicle body 7 from the shaft 9 to the step part 3, and when the shaft 9 slides in the vertical direction and is in the retracted position where the shaft 9 is laid down as shown in FIG. It is composed of a shaft guide 11 that is useful for storage under the step plate 5.

To describe the above structure in more detail, the shaft guide 11 is provided with a slide hole 13 into which the shaft 9 is slidably inserted. Rectangular parallelepiped-shaped engagement protrusions 14 are protrudingly provided, which are fitted between the upper and lower flanges of the step frame 4 in the retracted position and serve to lock and fix the shaft guide 11 in both positions.
A rod 16 is mounted on the protruding surface 25 of the slide hole 13 in a direction perpendicular to the axis of the slide hole 13, and a rod 17 is mounted on the side surface of the shaft guide 11 opposite to the rod 16 in a direction perpendicular to the axis of the slide hole 13. The engagement protrusions 14 are fixed to the engagement protrusions 14 so as to be horizontally opposed to each other on the same axis.

The rod 16 is rotatably supported approximately at the center of the web of the inner step frame 4, and the rod 17 is rotatably supported approximately at the center of the web of the outer step frame 4. is provided with an operating lever 18 that extends to reach the outer edge of the step plate 5, and is capable of rotating the rod 17 and pulling out and pushing in the axial direction, which behaves integrally with the rod 16 and the engagement protrusion 14. It is being

Therefore, the lifting device 6 can be maintained at each of the holding position, set position, and storage position by pulling out and rotating the operating lever 18.

The holding position refers to a position where the engagement protrusion 14 of the shaft guide 11 is locked and fixed to the step frame 4 so that the shaft 8 can be maintained in a vertical position when the shaft pin 10 is not inserted. In this case, the lifting body 8
In the range where there is a gap between the lower surface and the upper surface of the shaft kite 11, the shaft 9 will not move up or down regardless of whether the step part 3 is raised or lowered, and the lower surface of the lifting body 8 will not touch the shaft guide 1.
The position where the shaft guide 11 comes into contact with the top surface of the shaft guide 11 is the lowest position, which is the holding and lowering position.The set position is, as shown in FIG. 10, the step part 3
In this position, the lifting body 8 is set to maintain a predetermined height with respect to the step part 3, and the retracted position is a position in which the shaft 9 is horizontal. There are five positions where the engagement protrusion 14 of the shaft guide 11 is locked and fixed to the step frame 4 so that it is stored under the step frame 4.

As mentioned above, the shaft 9 is slidably inserted into the sliding hole 13 of the shaft guide 11, and the shaft 9 includes:
When in the set position, the lifting body 8 at the upper end and the step plate 5 are maintained at a height that allows them to be locked at a distance suitable for maintenance work on the underside of the vehicle body 7, as shown in FIG. As shown by arrow A in FIG. 2, an insertion hole 20 into which the shaft pin 10 is inserted is bored.

The length of the shaft 9 is determined from the holding position to the step part 3.
When the lower end of the shaft 9 is in contact with the floor surface after the lower end of the shaft 9 is lowered, the length is such that the lifting body 8 is held at a required height on the step plate 5 surface suitable for the maintenance work on the automobile, and when the lower end of the shaft 9 is in contact with the floor surface, The insertion hole 20 is connected to the step plate 5.
The shaft pin 10 is exposed on the upper surface of the shaft pin 10 and is configured to be inserted into and removed from the insertion hole 20.

The upper surface of the shaft guide 11 in the holding position and the set position is located below the upper surface of the step frame 4, and the upper surface of the lifting body 8 of the shaft 9 in the holding and lowering position is approximately at the same height as the upper surface of the step plate 5. It is structured as follows.

Further, the step plate 5 is provided with an entrance/exit 22 which is not necessary for the rotation and elevation of the lifting body 8 of the shaft 9.

Next, the functions and effects of the present invention will be described.

As shown in FIG. 4, when the shaft 9 in the storage position under the flange of the step frame 4 is pulled out in the axial direction, the engagement protrusion 14 of the shaft guide 11 and the step frame 4 are released. Then, the lifting body 8 is pulled out below the entrance/exit 22 and becomes rotatable.

In this pulled out position, move the operating lever 18 to the arrow B in FIG.
The shaft 9 assumes a vertical position by rotating as shown in FIG.

However, the height of the step frame 4 in the state shown in FIG. 5 is such that the step part 3 shown in FIG. It shall be at a height that is separate from the surface.

Next, by pushing the operation lever 18 in the axial direction, the engagement protrusion 14 of the shaft guide 11 is secured and fixed to the step frame 4.

This position is the holding position described above.

If you go down the step part 3 from this position, the shaft 9
When the lower end of the shaft 9 comes into contact with the floor surface and the step part 3 is further lowered, the lower end of the shaft 9 remains in contact with the floor surface, and the insertion hole 20 finally appears on the surface of the step plate 5. .

In this position, the shaft pin 10 is inserted into the insertion hole 20 as shown in FIG.
Conversely, when the step part 3 is raised in the set position where it is inserted to the position where it can be supported by the two circumferential step plates 5, the shaft 9 is moved to the lifting body 8.
is raised from the step plate 5 while being held at a predetermined height.

To store the shaft 9, lower the step part 3, pull out the shaft pin 10 from the insertion hole 20 with the lower end of the shaft 9 in contact with the floor, raise the step part 3, and lower the lifting body 8. Stop the step part 3 at the position where it has risen to the above-mentioned vehicle mounting position where the lower surface is in contact with the upper surface of the shaft guide 11, pull out the operation lever 18, and move it in the opposite direction of arrow B shown in FIG. This is achieved by rotating the operating lever 18 to the position shown in FIG. 4, pushing the operating lever 18, and engaging and fixing the engaging protrusion 14 of the shaft guide 11 to the step frame 4.

When it is necessary to change the tire support state to the vehicle body support state during car maintenance using the four-post lift configured as described above, the step part 3 is kept at the car mounting position, each lifting device 6 is used as a holding device in advance, and the car is placed. Then, when the step part 3 is lowered after moving the car body 7 to be lifted directly above each lifting device 6, the lower end of the shaft 9 comes into contact with the floor surface, and then the lifting body 8 approaches the car body 7. Then, as the step portion 3 descends, the vehicle body 7 is lifted by the lifting body 8.

When the shaft pin 10 is inserted into the insertion hole 20 at the position where the insertion hole 20 appears on the step plate 5, and then the step part 3 is raised in reverse, the vehicle body load is transferred from the shaft 9 to the step plate via the shaft pin 10. 5. Further supported by the step frame 4, the vehicle body 7 is maintained at a height that does not interfere with maintenance work on the step plate 5.

In this state, the step section 3 can be raised or lowered to an appropriate working position.

After completing the maintenance work, lower the step part 3 and lower the shaft 9.
When the lower end contacts the floor surface and the shaft pin 10 is pulled out at the position where the shaft pin 10 can be pulled out, and the step part 3 is raised to the car mounting position, the lifting body 8 is approximately at the same height as the upper surface of the step plate 5. As the vehicle sinks, the vehicle can be freely carried out from above the step section 3.

As mentioned above, since the rotation of the shaft 9 is always performed at the position where the lifting body 8 is in contact with the shaft guide 11, the shape of the entrance/exit 22 to be drilled in the step plate 5 is such that the shaft 9 is rotated when the lifting body 8 is in contact with the shaft guide 11. The opening area can be set to a minimum so that the body 8 does not come into contact with the step plate 5, and there is little problem in terms of the strength of the step part 3 and the transfer of the vehicle body load from the shaft pin 10 to the step plate 5. It can be a shape.

Next, another embodiment of locking and fixing the shaft guide 11 will be described.

As shown in FIG. 7, at the holding position and set position,
A guide block 12.12 that locks and fixes the engagement protrusion 14a of the shaft guide 11a together with the step plate 4 is fixed to the step frame 4 with a gap between the engagement protrusions 14a and the engagement protrusion 14a.

As shown in FIG. 8, the guide block 12 has a notch 2 into which the engaging protrusion 14a is fitted and locked in the storage position.
1 is provided.

Due to the presence of this guide block 12, the lifting device 6 is reliably locked and fixed in any of the holding position, set position, and storage position.

Furthermore, as shown in FIG. 8, in another embodiment, the rod 17 is provided with the engagement protrusion 1 of the shaft guide 11 or 11a.
By providing a spring 19 that always biases the lever 4 or 14a in the direction of engagement and fixation with the step frame 4, when the operator releases the pulled-out operation lever 18, it can be moved to any of the holding position, set position, and storage position. Even in this case, the lifting device 6 is automatically and reliably locked and fixed by the biasing force of the spring 19.

FIG. 9 shows a lifting device that combines the two embodiments described above.

In the illustrated example, the guide block 12 is screwed and fixed to the step frame 4, but other means such as a welding tool may be used as means for fixing the guide block 12 to the step frame 4.

Next, another embodiment of the shaft pin 10 will be described.

As shown in FIG. 10, the shaft pin 10a is connected to the pin body 23.
and the lid body 24 are integrally welded.

As shown in FIG. 1, the lid body 24 has a shape that can bridge the peripheral edge of the entrance/exit 22 formed in the step plate 5, and the inner edge of the lid body 24 has a shape that allows the pin body 23 to connect to the shaft 9.
The recess 25 is formed so as not to interfere with the shaft 9 when inserted into the insertion hole 20 of the shaft 9.

With this configuration, the vehicle body load applied to the shaft pin 10a is supported by the entire circumference of the pin body 23 and the lid body 24, the free length of only the pin body 23 is shortened, and the stress fulcrum of the pin body 23 approaches the shaft 9. Because it is provided, the pin body 23
The safety against bending of the shaft is much improved, and the shaft 9
By inserting the pin body 23 until the notch 25 of the lid body 24 comes into contact with the pin body 24, the insertion position of the pin body 23 is made constant, and the stop position can be easily determined, further increasing the safety of the insertion work.

Further, when the lifting device 6 is not in use, it is more preferable for the entrance/exit 22 of the step plate 5 to be covered with a lid body, but as shown in FIG. If a lid body 27 is provided that is engaged through a hinge 26, the lid body 27 can be opened and closed by sliding when the lifting body 8 is raised and lowered, so that the opening and closing of the lid body 27 can also be automated. sell.

Further, the shaft 9 is rotatable within the sliding hole 23 of the shaft guide 11, but as shown in FIG. In order to keep the position of the shaft 9 of the lifting body 8 constant, a chevron-shaped projection 28 is provided on the lower surface of the lifting body 8, and a groove 29 into which the projection 28 can fit is formed on the upper surface of the shaft guide 11b. By doing this, even if the shaft 9 is slightly rotated, its position can be automatically returned from the state shown in FIG. 12A to the state shown in FIGS. 12B and 12C.

Therefore, the lifting body 8 is always kept at a constant position, which helps stabilize the lifting work, and which prevents interference with the step plate 5 when the shaft 9 is rotated between the storage position and the holding position by the operating lever 18. The opening area of 22 can be minimized.

By attaching a cushion body 34 to the upper surface of the lifting body 8, as shown in FIG. 13, it is possible to prevent danger and damage caused by slippage of the vehicle body. As shown in FIG. 2, by attaching the cushion shoe 35, it is possible to prevent the lower end of the shaft 9 from slipping on the floor surface, to ensure the contact with the floor surface, and to prevent damage to the floor surface.

Since the present invention has the configuration described in the claims for utility model registration, by slightly modifying the conventional four-post lift, it is extremely easy to get in and out of a car in the same way as before, and other Using the power source of the four-post lift without requiring a power source, the vehicle can be changed from tire support to body support on the step, and the supported car body can be used for any work by raising and lowering the step. This eliminates the need to lie down on the floor under the vehicle during so-called differential installation/removal work, improving work efficiency, and eliminating the need for a separate frame to support the vehicle. Dogs do not interfere with work or obstruct visibility, and from this perspective, work efficiency is significantly improved. Dogs contribute to safe work by improving the worker's working posture, and therefore can be applied to various maintenance tasks. For work that requires a large lifting device and does not require a lifting device, storing it completely under the step plate has various advantages such as no hindrance to the work and no change in the required floor space. This is an excellent idea.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the embodiment, Fig. 2 is an enlarged sectional view of a portion taken along the line -I in Fig. 1, Fig. 3 is a partial sectional perspective view showing the usage state, and Fig. 4 is a partial perspective view of the storage position. FIG. 5 is a perspective view of the implied part in the holding position, FIG. 6 is a perspective view of the implied part in the set position, FIG. 7 is a partial perspective view showing another embodiment of the shaft guide locking, and FIG. is a partial cross-sectional view showing yet another embodiment of the locking in the storage position;
FIG. 9 is a partially enlarged sectional view of another embodiment from FIG. 2, and FIG.
The figure is a partial perspective view showing another embodiment of the shaft pin, the first
1 is a partial sectional view showing another embodiment of the lid, FIG. 12 is a partial side view showing another embodiment of the shaft, and FIG. 13 is a partial side view showing another embodiment of the lifting body. FIG. 14 is a partial sectional view showing another embodiment of the shaft, and FIG. 15 is a plan view of the conventional example. 3...Step part, 4...Step frame, 5...Step plate, 6...
... Lifting device, 7 ... Car body, 8 ... Lifting body, 9 ... Shaft, 10°10 a ...
-Shaft pin, 11.11a, 11b... Shaft guide, 16.17... Rondo, 20.
...Insertion hole.

Claims (1)

[Scope of utility model registration request] In a four-post lift for automobile maintenance, a lifting device is disposed at a position that can support the automobile body of a step part that is raised and lowered, and the lifting device is rotatably attached to the step frame and slidable in the axial direction. The shaft guide comprises a horizontally supported rond, a shaft guide fixedly supported by the rond, and a shaft slidably fitted into the shaft guide and whose upper end serves as a lifting surface for the vehicle body. teeth,
By rotating the rond, the shaft can be rotated and locked in a vertical position where the shaft stands upright and a horizontal position where the shaft is leveled, and the shaft is stored under the step plate in the horizontal position, Further, when the step part is in the lowered position in the vertical position and the lower end of the shaft comes into contact with the floor surface, the lifting body is of a length that is maintained at a required height above the step plate surface, and
The shaft is provided with an insertion hole perpendicular to the shaft axis in a portion located on the step plate surface when the step portion occupies a lowered position, and a shaft pin can be attached to and removed from the insertion hole. In addition, in the raised position of the step part, the shaft is latched and supported on the upper surface of the step part via the shaft pin when the shaft pin is attached, and when the shaft pin is pulled out, the lifting surface is almost flush with the step plate surface. A four-post lift with a lifting device characterized by being configured to be able to be lowered.