JPS63180484A - Table lifter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a table lifter used for maintenance of tractors, combine harvesters, construction machines, etc., and as a stand.

"Problems to be Solved by the Prior Art and Invention" A tractor, combine harvester, construction machine, etc. is placed on the table of a table lifter and the table is raised to perform work. Table lifters that support heavy loads, such as tractors, have a high minimum ground clearance, and require large-scale auxiliary means such as footrests to move the table onto the table. Additionally, when moving a tractor or the like onto the table, there was a risk of it falling over. However, the drive cylinder of a table lifter will not have sufficient lifting power to lift the table unless the installation inclination angle is 7° or more, so the minimum ground clearance is considerably higher than the diameter of the drive cylinder, making it difficult for tractors etc. to move on their own. A table lifter was buried underground in order to place the table on top.

``Means to be Solved by the Invention'' Therefore, in view of the above circumstances, the present invention provides a link that is pivotally attached to the tip of the rod of the cylinder, and the lower end of the link is connected to the intersection of the support arm in order to lower the table lifter as much as possible. When the cylinder is driven, the link is erected and the upper end of the link comes into contact with the table and rises, and when the cylinder reaches a predetermined inclination angle or more, the driving force of the cylinder is applied to the cross-pivot part of the support arm. It is configured to operate directly.

"Function" First, when the drive cylinder operates, the link is erected and the table is raised by the link. When the drive cylinder reaches a predetermined angle at which enough pushing force is generated to push up the table, the driving force of the cylinder is applied to the support arm. The table is raised by operating directly on the intersection pivot point of the table.

"Example" As shown in FIGS. 1 and 2, a table 2 is placed on a base 1. In FIGS. 1 to 3, the right side is the front side and the left side is the rear side.

X-shaped support arms 11 are interposed on both sides between the base 1 and the table 2, respectively. The support arm 11 consists of a front diagonal support arm 12 whose upper end is tilted forward, and a rear diagonal support arm 13 whose upper end is tilted rearward. Front diagonal support arm 12
and rear diagonal support arm 13 are crossed in an X-shape, and the intersection portions are pivotally connected. Install the roller 14 on the lower end of the support arm 12 on the base l. Install the roller 15 on the upper end of the rear diagonal support arm 13 on the upper surface of the table 2.
Each can be slid freely on the bottom surface. Note that the roller 15 is held between the upper plate 16 and the lower plate 17 of the table 2, and is transferred between the upper plate 16 and the lower plate 17. Both support arms 11
- Connect the 11 intersecting pivot parts 21, 21 with a square connecting rod 22. Further, the base ends 26 of the cylinders 23 are pivotally attached to the front seven frames 24 of the base l, and the tips of the rods 25 are connected to the connecting rods 22 via links 31. The tip of the rod 25 is pivotally attached to the center portion 32 of the link 31, the lower end 33 is pivotally attached to the connecting rod 22 via a bracket 34, and a roller 36 is rotatably provided at the upper end 35 of the link 31.

A support stand 41 for supporting the transmission of the combine harvester is provided at the front end of the base 1, and support stands 42 for supporting the frame are provided at the rear. In front of the table 1, stoppers 43, 43 for positioning the workpiece are provided to be extendable and retractable. As shown in FIG. 4, the support stand 41 is constructed by screwing a threaded rod 52 onto a cylindrical stand 51, providing a receiving portion 53 at the upper end of the threaded rod 52, and covering the receiving portion 53 with hard urethane 54. After adjusting the threaded rod 52, tighten the screw 55 to fix it. In addition, as shown in FIG. 5, the support stand 42 has a threaded rod 62 screwed onto a cylindrical stand 61, and a receiving part 63 is provided at the upper end.
Put on 4. After adjusting the height with the threaded rod 62, tighten the screw 65 to fix it.

In addition, when the workpiece is introduced into the table lifter, a hinge 66 is provided at the lower end of the support stand 41 so that the workpiece does not interfere with the support stands 41, 41. The receiver at the other end is used by inserting a pin into the cylinder 67. Workpiece positioning stopper 4
As shown in FIG. 6, positioning pins 73 are inserted into positioning holes 72, 72, 72, which are slidably formed in the guide 71 in the front and rear directions, to determine the position. The workpiece positioning stopper 43 can also be removed.

When the cylinder 23 is driven, as shown in FIG. The roller 36 at the end 35 is connected to the table 2
The table 2 is brought into contact with the upper plate 16 of the table 2 and raised.

If the rod 25 of the cylinder 23 continues to extend, the second
In the state shown by the two-dot chain line at the top of the figure, the tip of the rod 25 is directly operated from the link 31 through the placket 34 to the cross-pivot joint 21. Then, the roller 15 at the upper end of the rear diagonal support arm 13 pushes up the upper plate 16 of the table 2, and the upper end 19 of the front diagonal support arm 12 also moves upward.
to rise. When the cylinder 23 reaches a predetermined angle or more,
Instead of pushing up the upper end 35 of the link 31 by the roller 36, the table 2 is raised by the support arms 11. That is, in this table lifter, during the initial drive when the inclination angle of the cylinder 23 is small, the table 2 is raised by the link 31, and when the cylinder 23 reaches a predetermined angle or more, the table 2 is raised by the support arms 11.

When lowering the table 2, use the rod 2 of the cylinder 23.
5 is contracted, the connecting rod 22 is rotated via the bracket 34 to lower the upper ends of the front and rear diagonal support arms 12 and 13. Along with this, the table 2 is lowered. At this time, the upper end 19 of the front diagonal support arm 12 descends downward, and the roller 15 at the upper end of the support arm 13 contacts the lower plate 17 to lower the table 2. When the rod 25 continues to contract, the upper plate 16 of the table 2 is moved to the roller 36 at the upper end 35 of the link 31, which is rotating around the center part 32 of the link 31.
comes into contact with each other, and as the rod 25 of the cylinder 23 contracts, the table 2 descends.

When loading a tractor, etc. onto the table lifter, load it as shown in Figure 3. A workpiece positioning stopper 43 is set to an appropriate length, the mission is supported by a support stand 41 adjusted to an appropriate height, the support stands 42 are erected to support the frame at an appropriate height, and then raised. It is possible to stop and perform maintenance at a location suitable for work.

``Effects of the Invention'' As described above, the present invention can reduce the minimum ground clearance of the table lifter, so it can be easily moved to the table of a tractor, combine harvester, construction machine, etc., with or without auxiliary means. It can be done safely. In addition, it can be used by moving it to the necessary location without using any equipment such as an underground pit, and regardless of the presence or absence of an underground pit, without being restricted by the installation location.) According to this table lifter, the maintenance time is 30 to 50 minutes. % can be reduced. Furthermore, this table lifter allows you to work at any height, making your working posture more comfortable. Workers used to suffer from lower back pain due to working in an awkward posture, but this will be reduced. Furthermore, this table lifter can be set to any desired height, so it can also be used as a stand when loading a tractor onto a truck.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a table lifter according to an embodiment of the present invention when the table is raised, Fig. 2 is a side view showing the operating state of the present invention, and Fig. 3 is a view of the table lifter of Fig. Figure 4 is a vertical cross-sectional view of the support stand, Figure 5 is a vertical cross-sectional view of another support stand, and Figure 6 is a vertical cross-sectional view of the attachment part of the workpiece positioning stopper to the table. be. 1... Base 2... Table 12... Front diagonal support arm 13... Back diagonal support arm 18... Lower end of rear diagonal support arm 19... Lower end of front diagonal support arm 26. ... Base end 23 ... Cylinder 25 ... Rod 21 ... Cross pivot joint 31 ... Link 33 ... Lower end of link 35 ... Upper end of link

Claims (1)

[Claims] (1) Place the table on the base, and between the base and the table, make the front diagonal support arm and the rear diagonal support arm intersect in an X-shape, pivot the intersection, and connect the lower end of the rear diagonal support arm. The upper ends of the front diagonal support arms are pivotally connected to the table, the lower ends of the front diagonal support arms are slidably interposed on the top surface of the base, the upper ends of the rear diagonal support arms are slidably interposed on the bottom surface of the table, and the base ends are pivotally attached to the base. In a table lifter that moves the table up and down by driving the cross-joint part of the support arm with the rod end of the attached cylinder, the link is pivotally connected to the rod end of the cylinder, and the lower end of the link is pivoted to the cross-joint part of the support arm. When the cylinder is driven, the link is erected and the upper end of the link touches the table, causing it to rise. When the cylinder reaches a predetermined inclination angle or more, the driving force of the cylinder acts directly on the cross-pivot joint of the support arm. A table lifter characterized by being configured as follows.