JP2009249073A - Lifting/lowering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lifting/lowering device capable of effectively utilizing a space even when an upper space is small or in a special environment, and smoothly lifting/lowering a load by reducing the effect of the special environment. <P>SOLUTION: In the lifting/lowering device 100 comprising a plurality of elevating/lowering units 120 lifting/lowering along a stay 110, and a loading table 130 connected to the lifting/lowering units 120, the loading table 130 is formed in a portal shape, and a loading face of the loading table 130 is located above the lifting/lowering units 120. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lifting device that lifts and lowers a load by means of a mounting table connected to a lifting unit that moves up and down along a column, and more particularly to a lifting device that is used in an automobile body drying process or the like.

  2. Description of the Related Art Conventionally, as a lifting device that lifts and lowers a load by a mounting table connected to a lifting unit that moves up and down along a column, a plurality of columns, a plurality of lifting units that move up and down along the column, and a load are mounted. A lifting device having a mounting table and a connection mechanism that connects the lifting unit and the mounting table is known.

As shown in FIG. 6, these elevating devices 500 are provided with elevating units 520 and 570 that can be moved up and down along two columns 510 and 560, respectively.
Each of the lifting units 520 and 570 includes a plurality of guide rollers 521 and 571 for precisely following the columns 510 and 560, and moves up and down by winding and unwinding the wires 511 and 561.
Sheaves 512 and 562 for guiding the wires 511 and 561 are provided on the uppermost portions of the two columns 510 and 560.
The mounting table 530 on which the load C is mounted via the pallet P is connected and fixed to both the lifting units 520 and 570 and is configured to move up and down integrally with the lifting units 520 and 570 (for example, , See Patent Document 1).
Japanese Patent Laid-Open No. 10-291609 (page 3, FIG. 1, FIG. 3)

  However, in such a conventional lifting device, the lifting unit moves up and down along the column, and the loading surface of the loading of the loading table is below the lifting unit, so that the column is loaded with the loading of the loading table. There is a problem that it is necessary to make the space higher than the placement surface, and it is necessary to secure a space for accommodating the upper portion of the column in addition to the load accommodation space above the lifting device.

  Also, in applications where the upper space is at a high temperature and the load is carried into the environment, such as in the automobile body drying process, the upper part of the column is also exposed to the harsh environment, causing deformation and failure. There is a problem that the risk of hindering the lifting and lowering of the load increases.

  The present invention solves the problems of the prior art as described above, that is, the object of the present invention is to support the column even when the space above the lifting device is small or in a special environment. It is an object of the present invention to provide an elevating device that is not placed in a space, can effectively use the space, and can smoothly raise and lower a load while reducing the influence of a special environment.

  The invention according to claim 1 includes a plurality of support columns, a plurality of elevating units that move up and down along the support columns, a mounting table having a mounting surface on which a load is mounted, the elevating unit, and the mounting device described above. In the lifting device having a connection mechanism for connecting the table, the mounting table is formed in a gate shape, and the mounting surface is positioned above the lifting unit, thereby solving the problem.

  In the invention according to claim 2, in addition to the configuration of the lifting device described in claim 1, the plurality of support columns include four support columns, and the connection mechanism connects the two lifting units two by two. The above-described problem is further solved by connecting the above-described table to the elevating unit via the opposed horizontal beam.

  In the invention according to claim 3, in addition to the configuration of the lifting device described in claim 1 or 2, the plurality of support columns have a transmission mechanism that moves the lifting unit up and down at the top. When the mounting unit is positioned at the uppermost position, the mounting surface is positioned above the transmission mechanism, thereby further solving the problem.

  In the invention according to claim 4, in addition to the configuration of the lifting device described in any one of claims 1 to 3, the plurality of support columns detect the state of the transmission mechanism at the uppermost part thereof. By having a sensor that performs the above-described problem, the above-described problem is further solved.

  The lifting device according to the first aspect of the present invention includes a plurality of support columns, a plurality of lifting units that move up and down along the support columns, a mounting table having a mounting surface for mounting a load, and the lifting unit. In the lifting device having a connection mechanism for connecting the mounting table, the mounting table is formed in a gate shape, and the mounting surface is positioned above the lifting unit, so that the support column is mounted on the mounting table. Since the height can be lower than the mounting surface, even when the space above the lifting device is small or in a special environment, the column can be used effectively without being placed in the space, It is possible to smoothly lift and lower the load with less influence of the environment.

  And in addition to the effect which the raising / lowering apparatus which concerns on Claim 1 show | plays the raising / lowering apparatus of this invention which concerns on this 2nd, the said several support | pillar consists of four support | pillars, and the said connection mechanism is the said raising / lowering unit. There are two horizontal beams connected to each other, and the above-mentioned table is connected to the lifting unit via the opposed horizontal beams, so that the two lifting units connected by the horizontal beam are integrated. Because it moves up and down along two parallel support columns, it can be moved up and down stably without tilting or deforming even if the mounting table is raised and the center of gravity is raised, The load can be lifted and lowered more smoothly.

  Further, in the lifting device of the invention according to claim 3, in addition to the effect exhibited by the lifting device according to claim 1 or 2, the plurality of support columns cause the lifting unit to move up and down at the top. When the mounting surface has a mechanism and the space above the lifting device is small or has a special environment when the lifting unit is positioned above the transmission mechanism when the lifting unit is positioned at the top. In this case, the transmission mechanism on the column is not placed in the space, so that the space can be used effectively, and the risk of the transmission mechanism being damaged due to the special environment can be reduced. Can be done.

  Further, in the lifting device according to the fourth aspect of the present invention, in addition to the effect exhibited by the lifting device according to any one of the first to third aspects, the plurality of struts have the transmission mechanism at the top. By having a sensor that detects the state of the sensor, it is possible to reduce the risk of the sensor being damaged due to the influence of the special environment when the space above the lifting device is small or in a special environment. The state of the mechanism can be detected accurately, and the load can be raised and lowered more smoothly.

  The lifting device of the present invention includes a plurality of support columns, a plurality of lifting units that move up and down along the support columns, a mounting table having a mounting surface for mounting a load, the lifting unit and the mounting table described above. In the lifting device having a connecting mechanism to be connected, the mounting table is formed in a gate shape, the mounting surface is positioned above the lifting unit, and the space above the lifting device is small or special. Even when it is an environment, the pillars are not placed in the space, the space can be used effectively, and the load can be raised and lowered smoothly by reducing the influence of the special environment So long as the specific embodiment thereof is arbitrary.

That is, the lifting device of the present invention may be used in manufacturing equipment such as an automobile body drying process, or may be used in storage equipment such as a warehouse.
Moreover, the mounting table of this invention may mount a load directly on an upper surface, and may mount the pallet which mounted the load.
Further, the transmission mechanism for vertically moving the lifting unit according to the present invention may have a structure that has a rope, a wire, a chain, a belt, etc. and suspends the lifting unit. It may be a thing.

  Further, the transmission mechanism for moving the lifting unit of the present invention up and down may be one in which a winding drum for winding up a rope, wire, chain, belt or the like is provided at the top of the column, and the rope, wire, chain, belt, etc. A sheave, a sprocket or the like that hangs around may be provided at the top of the support column. Further, an upper bearing of the screw shaft or the like may be provided at the top of the support column.

Below, the raising / lowering apparatus which is an Example of this invention is demonstrated based on drawing.
FIG. 1 is an overall perspective view of a lifting device in use according to an embodiment of the present invention, FIG. 2 is a perspective view in which a mounting table of the lifting device of FIG. 1 is raised, and FIG. FIG. 4 is a partially enlarged explanatory view of FIG. 3, and FIG. 5 is a front view of the drying line of FIG.

  As shown in FIGS. 1 and 2, the lifting device 100 according to the embodiment of the present invention is provided with lifting units 120, 121, 122, and 123 along four columns 110, 111, 112, and 113, respectively. In addition, a sprocket S (not shown) around which the chain 150 is wound, a sensor (not shown) for detecting breakage or cutting of the chain 150, and the periphery thereof are covered on the uppermost portions of the respective columns 110, 111, 112, and 113. A cover 160 is provided and can be moved up and down by winding and rewinding the chain 150.

And the raising / lowering unit 120 and the raising / lowering unit 121 and the raising / lowering unit 122 and the raising / lowering unit 122 are respectively connected by the cross beam 140, and are comprised so that it may move up and down integrally.
In this embodiment, the elevating units 120 and 122 have guide rollers 125 and 127 for precisely following the columns 110 and 112, and the elevating units 121 and 123 do not have guide rollers, but all the elevating units A guide roller may be provided.

On the other hand, the mounting table 130 has a pallet rail 132 for mounting a pallet on the upper surface of the central portion, and has support legs 131 extending downward at both ends in the longitudinal direction. The lower end of the supporting leg 131 is fixed to the cross beam 140.
The length of the support leg 131 is set so that the top surface of the pallet rail 132 is located further above the top surface of the cover 160 when the mounting table 130 is raised most as shown in FIG.

Next, the operation when the lifting device 100 configured as described above is used in the automobile body drying process will be described below.
As shown in FIG. 3, the drying line 200 in the automobile body drying process includes a drying furnace 210 having lifts 100 at both ends, a heating device 220 that raises the temperature inside the drying furnace 210, a drying furnace 210, and heat generation. A pallet return unit 230 provided below the apparatus 220 is provided.

First, the automobile body C placed on the pallet P is loaded into the drying line 200 from the upstream line 201 (left side of the drawing), and the automobile body C is placed on the placing table 130 of the lifting device 100 on the upstream side of the drying furnace 200. The pallet P is placed together.
Then, as the placing table 130 of the lifting device 100 on the upstream side is raised, the automobile body C placed on the pallet P is carried into the uppermost stream of the drying furnace 210 from below.

The automobile body C placed on the pallet P is transported downstream in the drying furnace 210 over a predetermined time required for the drying process, and is loaded together with the pallet P on the placing table 130 of the lifting device 100 on the downstream side. Placed.
Then, the mounting table 130 of the lifting device 100 on the downstream side is lowered, so that the automobile body C mounted on the pallet P is carried out from below to the most downstream side of the drying furnace 210.
The automobile body C is transported together with the pallet P from the downstream lifting device 100 where the mounting table 130 is lowered to the downstream (left of the drawing) line 202.

  The pallet P is collected at an appropriate point in the line 202 downstream from the drying line 200, and is transported to the upstream line 201 through the pallet return unit 230 provided below the drying furnace 210 and the heating device 220. It is recycled as a pallet on which another automobile body C is placed again at the point.

As shown in FIG. 4, the area A in the drying furnace 210 is maintained at a temperature optimum for drying, for example, 200 ° C. by the heating device 220, and the carry-in / out port of the upstream and downstream automobile body C is Only the bottom is open.
Since the mounting table 130 is formed in a gate shape, the cover 160 provided at the top of each column 110, 111, 112, 113 of the lifting device 100 is not an area A in the drying furnace 210 but an opening. Since the temperature inside the cover 160 is as low as about 120 ° C., the heat-resistant conditions required for the sprocket S and sensor (not shown) are relaxed, and deformation, failure, etc. The risk of occurring and hindering the lifting of the load is greatly reduced.

  Further, as shown in FIG. 5, since the mounting table 130 is formed in a gate shape, the cover 160 provided on the uppermost portion of each column 110, 111, 112, 113 of the elevating device 100 is replaced with a drying furnace. 210 can be placed not in area A in 210 but in a slightly lower temperature area B below the opening, so that there is no need for a space for accommodating each column 110, 111, 112, 113 near the opening of the drying furnace 210, The opening can be minimized.

  Further, since the opening can be minimized, as shown in FIGS. 4 and 5, the temperature is about 60 ° C. in the lower area C and about 40 ° C. or less in the area D. Since the influence of heat on the device can be reduced, deformation of each component of the lifting device 100 due to heat can be reduced so that the lifting and lowering can be performed smoothly, and there is a risk that a failure or the like may occur and hinder lifting. The effect is enormous.

The whole perspective view of the use condition of the raising / lowering apparatus which is an Example of this invention. The perspective view which the mounting table of the raising / lowering apparatus of FIG. 1 raised. The side view of the automobile body drying line which is an example of application of the present invention. Explanatory drawing which expanded a part of drying line of FIG. The front view of the drying line of FIG. The whole side view of the use condition of the conventional raising / lowering apparatus.

Explanation of symbols

100, 500 ... Lifting devices 110, 510 ... Posts 111, 112, 113 ... Posts 120, 520 ... Lift units 121, 122, 123 ... Lift units 125, 525 ... Guide rollers 130, 530 ... Placement table 131 ... Support legs 132, 532 ... Pallet rail 140 ... Cross beam 150 ... Chain 550 ... Wire 160 ... Cover 200 ... Drying line 201 ... Upstream line 202 ... Downstream line 210 ... Drying furnace 220 ... Heating device 230 ... Pallet return part C ... Load P ... Pallet S ... Sprocket

Claims (4)

A plurality of support columns, a plurality of lifting units that move up and down along the support columns, a mounting table that has a mounting surface for mounting a load, and a lifting mechanism that connects the lifting unit and the mounting table described above. In the device
The above table is formed in a gate shape,
The lifting device according to claim 1, wherein the mounting surface is located above the lifting unit. The plurality of struts consists of four struts,
The connection mechanism has a cross beam for connecting the elevating units two by two;
The lifting device according to claim 1, wherein the placing table is connected to the lifting unit via the transverse beams facing each other. The plurality of struts have a transmission mechanism that moves the lifting unit up and down at the top,
The lifting device according to claim 1 or 2, wherein the mounting surface is positioned above the transmission mechanism when the lifting unit is positioned at the uppermost position.   The lifting device according to any one of claims 1 to 3, wherein the plurality of support columns include a sensor that detects a state of the transmission mechanism at an uppermost portion thereof.

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