JP3045702U - lift device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To raise a bag containing rice or the like to a predetermined height so that an operator can easily take it out. SOLUTION: A table 1 on which a bag A is placed is provided so as to protrude forward of a column 2. A limit switch 20 for detecting the bag A placed on the table 1 is provided on the table 1.
A control device 19 for operating the lifting drive device 16 by the limit switch 20 is provided. Further, the control device 19 includes a timer 22. When the bag A is placed on the table 1, the limit switch 20 is operated, and by this operation, the elevation drive device 16 is driven, and the table 1 is raised to the upper limit position. When the bag A is carried out at the upper limit position, the limit switch 20 is operated and the timer 22 is operated, and after the timer set time T has elapsed, the lifting drive device 16 is started and the table 1 is lowered.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an elevating device for elevating an object such as a rice bag.

[0002]

[Problems to be solved by the invention]

 For example, various types of agricultural machinery have been developed and used, including combine harvesters and rice transplanters. After harvesting, rice is transported in bags, but when handling a large number of bags containing rice, etc., it is often necessary to stack bags on pallets and transport them using a forklift truck. Although it can be done, it may be more efficient to carry one bag or several bags manually. However, bags containing rice were heavy, for example, 30 kg, and lifting the bags placed on the floor or the like required a great deal of labor.

Therefore, an object of the present invention is to solve the above-mentioned problem and to provide an elevating device capable of lifting an object to be lifted or lowered such as a bag containing rice by a simple operation. Another object of the present invention is to provide a lifting device capable of lifting an object to be raised and lowered with a simple operation and without malfunction.

[0004]

[Means for Solving the Problems]

 According to the invention of claim 1, a table is provided protruding in front of a column, on which an object to be lifted and placed is placed, a lifting drive device for driving the table up and down along the column, and the table provided on the table. What is claimed is: 1. A lifting device, comprising: a detection device for detecting a lifting object; and a control device for controlling the lifting driving device, wherein a table is provided by detecting the presence or absence of a lifting object by a detection device provided on a table. Can be raised and lowered automatically.

In the invention of claim 2, the control device lifts the object to be lifted and lifted from the table at the upper limit position, and after the detecting device detects the lifting, the timer means is operated, and the timer setting time is set. The lifting device according to claim 1, wherein the lifting device is started to control the table to be lowered after a lapse of time, and when the object to be raised and lowered is lifted from the table at the uppermost position, this is detected. The device detects and the table descends after the timer set time has elapsed.

Further, the invention according to claim 3 includes an upper limit switch and a lower limit switch for detecting an upper limit and a lower limit position of the table, and the control device controls the upper limit and the lower limit when the table reaches the upper limit and the lower limit position. 3. The lifting device according to claim 2, wherein the elevation drive device is stopped by operating a position switch, and when the table reaches an upper limit position or a lower limit position, the upper limit switch or lower limit switch is activated, and Automatically stops.

[0007] Further, in the invention of claim 4, the detecting device includes an operating portion provided so as to protrude from an upper surface of the table, and when the object to be raised and lowered is placed on the table, The operating part is pressed down to detect the placement of the object, and when the object is lifted from the table, the operating part projects to detect the lifting of the object. The control device controls the start-up / down drive device to start up the table after the detection device detects the placement of the object to be lifted / lowered on the table at the lower limit position. The lifting device according to claim 3, wherein the operating portion is provided so as to protrude from the upper surface of the table, so that the state in which the object to be lifted is placed is directly detected and the device can be reliably operated. After the object is placed on the table, the table automatically rises.

Further, the invention of claim 5 includes a pair of right and left columns, and the left and right columns have a U-shaped vertical cross section and have vertical recesses, and the recesses face each other inward. The left and right columns are provided with a grounding pedestal protruding from the lower front portion thereof, and the lifting / lowering drive device has a traveling body that moves up and down between the left and right columns. The traveling body is provided integrally with a rear portion of the table, and the traveling body is provided with first wheels pivotally mounted so as to be in contact with the front surface of the concave portion, and is provided with left and right shafts so as to be in contact with the side surfaces of the concave portion. 4. The lifting apparatus according to claim 3, further comprising a second wheel, and a third wheel pivotally mounted so as to be in contact with a rear surface of the concave portion. Because it is stable and does not fall down when the table rises No. In addition, when the table is moved up and down, the wheels provided on the traveling body move up and down in contact with the concave portions.

In addition, according to the invention of claim 6, a support projection made of an elastic body for supporting the table at the lower limit position is provided on the upper surface of the installation table, and the object to be lifted and lowered is loaded on the side of the installation table. A stand for mounting the table is provided separately, and the upper surface of the table is located slightly above the lower limit position of the table, and a moving wheel is provided at a lower portion of a rear surface of the column, and a moving wheel is provided at an upper portion of the rear surface of the column. The lifting device according to claim 5, further comprising a handle, wherein the table at the lower limit position is supported by the support protrusion. In addition, the object to be lifted can be easily placed horizontally on the table by placing the object to be placed vertically on the table and then turning it down. Further, when the lifting device is moved to another place, it can be moved by grasping the handle and tilting it backward to ground the wheels.

[0010] In addition, in the invention of claim 7, the control device is configured such that, after the detection device detects the object to be lifted / lowered to the table at the lower limit position, a second timer is operated to set the timer. 7. The elevating device according to claim 6, wherein the elevating drive device is started after a lapse of time to control the ascending and descending of the table. The detection device detects and the table rises after the timer set time has elapsed.

[0011]

[Embodiment of the invention]

 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. A table 1, which is a lifting transporter, on which a bag A, which is an object to be lifted, containing grains such as rice, is formed of a flat plate having a rectangular shape. The ascent and descent along the column 2 are performed. The support columns 2 each have a U-shaped flat cross section, the concave portions 3 of the support columns 2 face each other inward, and a mounting table 4 provided at the lower portion of the support columns 2 and grounded to a floor or the like is horizontally moved forward. It protrudes. A support protrusion 4A made of an elastic material such as rubber is provided on the upper surface of the mounting table 4. Further, a moving wheel 5 is provided at a lower portion of a rear surface of the column 2, and a moving handle 6 is provided at an upper portion of a rear surface of the column 2.

At the rear end of the table 1 there is provided a vertical plate 7 which is a support for the table 1, and on the rear surface of the vertical plate 7 a moving body 8 for raising and lowering is integrally provided. 9, 10, 11 are provided. The first wheels 9 are provided on the right and left front portions of the traveling body 8, respectively, and are mounted on the front surface 3 </ b> A of the concave portion 3 so as to be in contact with the front surface 3 </ b> A. The second wheels 10 are provided on the left and right side surfaces of the traveling body 8, respectively, and a pair of upper and lower wheels are mounted on the vehicle so that the peripheral surfaces thereof are in contact with the side surfaces 3 B of the recess 3. Further, a pair of third wheels 11 is provided on the left and right rear portions of the traveling body 8, respectively, and the third wheels 11 are pivotally mounted so that their peripheral surfaces are in contact with the rear surface 3 </ b> C of the recess 3. Further, a motor 12 is provided at the rear of the mounting table 4, and this motor 12 is provided with a speed reducer (not shown), and a drive sprocket 12A is provided on an output rotating shaft. On the other hand, a driven sprocket 14 is rotatably provided on a lower surface of a top plate 13 which is an upper member provided between upper portions of the columns 2. Then, the chain 15 is wound around the driving and driven sprockets 12A and 14A. This chain 15 has one end 15A connected to the traveling body 8 upward, mounted on the driven sprocket 14, and then mounted on the driven sprocket 12A, and the other end 15B via an elastic body 15C such as a coil spring. It is connected to the traveling body 8 downward. Therefore, an elevating drive unit 16 for elevating and lowering the table 1 is formed by the running body 8, the motor 12, the chain 15, and the like. When the driving sprocket 12A is rotated clockwise (arrow X) in FIG. As a result, when the drive sprocket 12A is rotated counterclockwise, the traveling body 8 and, consequently, the table 1 are lowered.

Upper and lower limit switches 17 and 18 serving as a detecting device for detecting the upper and lower positions of the traveling body 8 are provided at the upper and lower portions of the column 2 on one side. The upper limit switch 17 is set so that the table 1 stops at a position substantially at the waist of the worker M. Therefore, when the traveling body 8 and, consequently, the table 1 reach the upper and lower limit positions, the operating portions 17A and 18A of the limit switches 17 and 18 are operated to stop the motor 12 via the control device 19. Further, the table 1 is provided with a limit switch 20 as a detecting device for detecting the bag A 1 as an object to be raised and lowered. The limit switch 20 is provided with an operating portion (actuator) 20A projecting upward from a hole 21 formed substantially at the center of the table 1 so that when the bag A is placed on the table 1, the operating portion 20A is pushed down and the bag A is placed. When the bag A is lifted from the table 1 while the bag A is lifted from the table 1, it is possible to detect that the bag 20 is not placed on the table 1 with the operating portion 20A projecting above the table 1 again. The control device 19 is connected to the limit switches 17, 18, 20 and the motor 12, and when the bag A on the table 1 is lifted and the limit switch 20 does not detect the bag A, for example, within 10 seconds, preferably. Is provided with a timer 22 which is a timer means set to start the motor 12 after 1 to 5 seconds, more preferably 1 to 3 seconds. Reference numeral 23 denotes a power switch, and 23A denotes a lamp that lights when the power switch 23 is closed.

Further, a table 24 for loading the bags A sideways on the table 1 is provided on the side of the installation table 4. The table 24 is provided separately from the above-mentioned lifting device, and the upper surface 24A is located slightly above the lower limit position of the table 1 described later.

Next, the operation of the above configuration will be described. When the power switch 23 is closed in advance, the lamp 23A lights up. Next, as shown in FIG. 2, the bag A is placed on the table 24 in the vertical direction, and then the bag A is turned over and the table 1 in the lower limit state (the solid line part in FIG. 1, the state of FIG. 5A). Place bag A on When the bag A is placed on the table 1 in this manner, the limit switch 20 detects that the operating portion 20A is pressed and the bag A is placed on the table 1. The operation of the limit switch 20 causes the control device 19 to rotate the motor 12 in the direction of the arrow X. Therefore, one end 15A of the chain 15 operates so as to lift the table 1, and the table 1 is raised. Then, when the traveling body 8 presses the operating portion 17A, the upper limit switch 17 detects that the table 1 is at the upper limit position (shown by a dashed line in FIG. 1, the state shown in FIG. 5B). In response to this detection, the control device 19 stops the motor 12. When the worker M carries out the bag A after the table 1 reaches the upper limit position together with the bag A in this manner (the state of c in FIG. 5), the operating portion 20A returns upward, and the table 1 does not have the bag A. The state is detected by the limit switch 20 (state of FIG. 5C). By this detection, the timer 22 provided in the control device 19 is operated, and after the timer set time T of the above-mentioned timer 22 (for example, 10 seconds, preferably 1 to 5 seconds, more preferably 1 to 3 seconds), the motor 12 is started. It is reversed (state d in FIG. 5). Due to this reverse rotation, the other end 15B of the chain 15 pulls down the table 1. As a result of this lowering, the traveling body 8 descends together with the table 1, and when the table 1 comes into contact with the support projections 4A of the installation base 4 to be supported, the traveling body 8 simultaneously presses the operating portion 18A. By this pressing operation, the lower limit position limit switch 18 detects the state of the table 1 at the lower limit position, and stops the reverse rotation of the motor 12 via the control device 19 (state of e in FIG. 5). After that, it is in a standby state for lifting the next bag A.

When the lifting device is moved to another place, it can be moved by gripping the handle 6 and tilting it backward to ground the wheels 5.

As described above, in the embodiment, according to the first aspect, the table 1 is provided so as to protrude from the front of the column 2 and on which the bag A which is the object to be lifted and lowered is placed. A lifting / lowering drive device 16 for driving the lifting / lowering device, a limit switch 20 provided on the table 1 for detecting the bag A, and a control device 19 for controlling the lifting / lowering drive device 16 to determine whether the bag A is present or not. Is detected by the limit switch 20 provided on the table 1, the table 1 can be automatically moved up and down, and the bag A can be placed on the table 1 and lifted to a height at which it can be easily carried out. Can carry the bag A without bending down. In addition, since the limit switch 20 is directly operated by the bag A placed on the table 1, the bag A can be reliably detected and the malfunction can be eliminated.

As described above, in the present embodiment, in response to claim 2, the control device 19 lifts the bag A from the table 1 at the upper limit position, and after the limit switch 20 detects this lifting, the timer 19 sets the timer. 2. The lifting device according to claim 1, wherein the timer 22 is operated, and after the timer set time T has elapsed, the lifting drive device 16 is started to control the table 1 to descend. When the bag A is lifted from the table 1, the limit switch 20 detects this, and the table descends after the timer set time T has elapsed. Therefore, before the worker M can hold the bag A, the table 1 does not descend and the take-out operation can be carried out without worry. When the bag A is carried out from the table 1 as described above, the table 1 is immediately moved. Is not lowered, and the table 1 is lowered after the elapse of the timer set time T, so that the table 1 is lowered after the worker M has securely held the bag A.

Further, as described above, in the present embodiment, the upper limit and the lower limit switch for detecting the upper and lower positions of the table 1 are provided. 3. The lifting device according to claim 2, wherein the controller 19 stops the lifting drive device 16 by operating the upper limit switch 17 and the lower limit switch 18 when the table 1 reaches the upper limit and lower limit positions. When the table 1 reaches the upper and lower limit positions, the upper and lower limit switches 17 and 18 are operated, and the table 1 can be automatically stopped, so that the work can be performed smoothly.

Further, as described above, in the present embodiment, in the invention of claim 4, the limit switch 20 serving as the detecting device includes the operating portion 20A provided to protrude from the upper surface of the table 1, and the bag A When the bag A is placed on the table 1, the operating portion 20A is pressed down to detect the placement of the bag A, and when the bag A is lifted from the table 1, the operating portion 20A protrudes to detect the lifting of the bag A. After the limit switch 20 detects that the bag A has been placed on the table 1 at the lower limit position, the control device 19 controls the starting device 16 to start and move up the table 1. The operating device 20A is provided so as to protrude from the upper surface of the table 1, so that the state in which the bag A is placed can be directly detected and operated reliably. After the bag A is placed on the table 1, the table 1 automatically rises.

Moreover, in this embodiment, the invention of claim 5 includes a pair of right and left columns 2, 2, and the left and right columns 2, 2 have a U-shaped cross section in the vertical direction. A recess 3 is provided, and the recesses 3 are arranged to face inward from each other. On the left and right columns 2, a mounting table 4 for grounding is protruded in front of a lower portion thereof. It has a traveling body 8 that moves up and down between the left and right columns 2, 2. This traveling body 8 is integrally provided at the rear of the table 1, and the traveling body 8 is pivotally mounted so as to be in contact with the front surface 3 </ b> A of the recess 3. A first wheel 9, a second wheel 10 provided on each of the left and right sides and axially mounted so as to contact the side surface 3 </ b> B of the concave portion 3, and a third wheel 11 axially mounted so as to contact the rear surface 3 </ b> C of the concave portion 3 The lifting device according to claim 3, wherein the mounting table (4) is provided below the support (2). It has good qualitative characteristics and does not fall down when the table 1 rises. When the table 1 is moved up and down, the wheels 9, 10 and 11 provided on the traveling body 8 come into contact with the recess 3 and move up and down.

In addition, as described above, in the present embodiment, the support projection 4A made of an elastic body that supports the table 1 at the lower limit position is provided on the upper surface of the installation table 4 according to the sixth aspect. The table 24 for loading the bag A is provided separately on the side of the table 1, and the upper surface 24A of the table 24 is located slightly above the lower limit position of the table 1 and the moving wheel 5 is provided at the lower rear part of the column 2. The lifting device according to claim 5, wherein a moving handle (6) is provided on an upper portion of a rear surface of the column (2), wherein the table (1) at a lower limit position is supported by a support protrusion (4A). Also, by placing the bag A vertically on the table 24 and then turning it sideways, the bag A can be easily placed horizontally on the table 1. Further, when the lifting device is moved to another place, it can be moved by grasping the handle 6 and tilting it backward to ground the wheels 5.

FIGS. 6 and 7 show a second embodiment, in which the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In the second embodiment, the control device 19 is provided with a second timer 31. Therefore, when the bag A is loaded when the table 1 is at the lower limit position, the limit switch 20 detects this (the loading state in FIG. 7). When the second timer 31 is activated by this detection, the second timer 31 sets a timer setting time T 'of, for example, 10 seconds, preferably 1 to 5 seconds, and more preferably 1 to 3 seconds. Therefore, by raising the table 1 via the control device 19 after the elapse of the timer set time T '(state of a' in FIG. 7), the table 1 does not rise immediately after loading, Work such as adjusting the position of A can be performed reliably.

As described above, in the present embodiment, in response to claim 7, after the limit switch 20 serving as a detecting device detects the placement of the bag A on the table 1 at the lower limit position, the control device 19 executes 7. The elevating device according to claim 6, wherein the elevating device is started and the table 1 is controlled to be raised after the elapse of the timer set time T '. Therefore, for example, the operation of adjusting the position of the bag A on the table 1 can be reliably performed without the table 1 being raised.

The present invention is not limited to the above embodiment. For example, in the embodiment, the detection device is the limit switch 20. A detection device for detecting the presence / absence of an object to be moved, such as a proximity switch that operates in response to such an event or an optical sensor that detects electromagnetic waves such as light when the object to be moved is blocked, may be used. Further, the timer means may be various means, such as a means that operates after a lapse of a set time. Further, in the embodiment, the elevating drive device 16 is formed by the traveling body 8, the motor 12, the chain 15, and the like. As the elevating drive device for elevating and lowering the table, for example, a wire that can be wound and fed by a motor The table may be connected to the table so that the table can be moved up and down.Also, the table can be moved up and down by driving a motor, screwing it into a vertical screw shaft, and rotating the screw shaft. Various modifications are possible.

[0026]

[Effect of the invention]

 According to the invention of claim 1, a table is provided protruding in front of a column, on which an object to be lifted and placed is placed, a lifting drive device for driving the table up and down along the column, and the table provided on the table. A lifting device, comprising: a detection device for detecting a lifting object; and a control device for controlling the lifting driving device. It is possible to move up and down, reducing the labor in transporting the object to be lifted and improving work efficiency.

In the invention of claim 2, the control device lifts the object to be lifted and lowered from the table at the upper limit position, and after the detection device detects the lifting, the timer means is operated, and the timer setting time is set. 2. The elevating device according to claim 1, wherein the elevating drive device is started to control the descent of the table after the elapse of the elapse of time. The table can be raised and lowered, the work efficiency in transporting the object to be lifted can be reduced, and the work efficiency can be improved. In addition, when the object to be lifted and lifted is lifted, the table is not immediately lowered and the carry-out can be reliably performed.

Further, the invention of claim 3 includes an upper limit switch and a lower limit position switch for detecting an upper limit and a lower limit position of the table, and the control device controls the upper limit and the lower limit when the table reaches the upper limit and the lower limit position. The lifting device according to claim 2, wherein the lowering position switch is actuated to stop the lifting drive device, wherein the table can be raised and lowered automatically without malfunction by reliably detecting the presence or absence of an object to be raised and lowered. Work efficiency can be improved by reducing labor in transporting the object.

[0029] Furthermore, in the invention of claim 4, the detection device includes an operating portion provided so as to protrude from an upper surface of the table, and when the object to be raised and lowered is placed on the table, The operating part is pressed down to detect the placement of the object, and when the object is lifted from the table, the operating part projects to detect the lifting of the object. The control device controls the start-up / down drive device to start up the table after the detection device detects the placement of the object to be lifted / lowered on the table at the lower limit position. The lifting device according to claim 3, wherein the presence / absence of the object to be lifted is reliably detected, and the table can be automatically moved up and down without malfunction, the labor in transporting the object to be lifted can be reduced, and the working efficiency can be improved. , Going up and down When lifting an object, the table does not immediately descend, making it possible to carry it out reliably.

Further, the invention of claim 5 includes a pair of right and left columns, and the left and right columns have a vertical section having a U-shaped cross section, and the concave sections face each other inward. The left and right columns are provided with a grounding pedestal protruding from the lower front portion thereof, and the lifting / lowering drive device has a traveling body that moves up and down between the left and right columns. The traveling body is provided integrally with a rear portion of the table, and the traveling body is provided with first wheels pivotally mounted so as to be in contact with the front surface of the concave portion, and is provided with left and right shafts so as to be in contact with the side surfaces of the concave portion. 4. The lifting device according to claim 3, further comprising a second wheel, and a third wheel pivotally mounted so as to be in contact with a rear surface of the concave portion. The table can be moved up and down automatically without malfunction, and In this way, the work efficiency can be improved by reducing the labor involved, and the table can not be immediately lowered when lifting the object to be lifted, so that the object can be reliably carried out.

In addition, according to the invention of claim 6, a support projection made of an elastic body that supports the table at the lower limit position is provided on the upper surface of the installation table, and the object to be lifted and lowered is loaded on the side of the installation table. A stand for mounting the table is provided separately, and the upper surface of the table is located slightly above the lower limit position of the table, and a moving wheel is provided at a lower portion of a rear surface of the column, and a moving wheel is provided at an upper portion of the rear surface of the column. The lifting device according to claim 5, characterized in that a handle is provided, and the presence / absence of an object to be raised / lowered can be reliably detected and the table can be automatically raised / lowered without malfunction, thereby reducing labor in transporting the object to be raised / lowered. As a result, the work efficiency can be improved, and when the object to be lifted is lifted, the table does not immediately descend and the carry-out can be reliably performed.

[0032] In addition, in the invention of claim 7, the control device is configured such that after the detection device detects the placement of the object to be lifted on the table at the lower limit position, the control device moves up and down after a timer set time elapses. 7. The lifting device according to claim 6, further comprising a second timer means for starting the driving device and raising the table. The lifting device according to claim 6, wherein the presence or absence of an object to be lifted is reliably detected and automatically performed without malfunction. The table can be raised and lowered, and the work efficiency in transporting the object can be reduced and the work efficiency can be improved.Moreover, when loading or unloading the object to be loaded or unloaded from the table, the table does not operate immediately and loading or unloading is performed. It can be done reliably.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a first embodiment of the present invention.

FIG. 3 is a rear view showing the first embodiment of the present invention.

FIG. 4 is a block diagram showing a first embodiment of the present invention.

FIG. 5 is a time chart showing the first embodiment of the present invention.

FIG. 6 is a block diagram showing a second embodiment of the present invention.

FIG. 7 is a time chart showing a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Table 2 Support | pillar 3 Recess 3A Front surface 3B Side surface 3C Rear surface 4 Installation stand 4A Support projection 5 Moving wheel 6 Moving handle 8 Traveling object 9 1st wheel 10 2nd wheel 11 3rd wheel 16 Elevating drive 17 Upper limit Position limit switch (upper limit position switch) 18 Lower limit position limit switch (lower limit position switch) 19 Controller 20 Limit switch (detection device) 20A Actuator 22 Timer (timer means) 24 24A Upper surface 31 Second timer A bag (elevated object) T, T 'Timer setting time

Claims (7)

[Utility model registration claims] 1. A table provided to protrude in front of a column and on which an object to be lifted and placed is mounted, a lifting drive device for driving the table up and down along the column, and detecting the object to be raised and lowered provided on the table And a control device for controlling the lifting drive device. 2. The control device lifts the object to be lifted and lifted from the table at an upper limit position, and after the detecting device detects the lifting, a timer means is operated. 2. The elevating device according to claim 1, wherein the elevating device is controlled to start and lower the table. 3. An upper / lower position switch for detecting an upper / lower position of the table, wherein the control device comprises:
3. The lifting device according to claim 2, wherein when the table reaches the upper and lower positions, the lifting and lowering device is stopped by operating the upper and lower position switches. 4. The apparatus according to claim 1, wherein the detecting device includes an operating portion provided to protrude from an upper surface of the table, and when the object to be lifted is placed on the table, the operating portion is pushed down to lift the object. And when the object to be lifted is lifted from the table, the operating portion projects to detect the lifting of the object to be lifted, and the control device is configured to move the lower limit position to the table. The lifting device according to claim 3, wherein after the detection device detects the placement of the object to be lifted, the lifting device is started to control the table to rise. 5. 5. A pair of left and right columns, the left and right columns having a vertical cross-section having a U-shape and having vertical recesses, wherein the recesses are arranged inwardly facing each other. The column has a ground mounting table protruding at the lower front thereof, and the lifting drive device has a traveling body that moves up and down between the left and right columns, and this traveling body is integrally formed at the rear of the table. Provided, the traveling body, a first wheel axially attached to contact the front surface of the concave portion, and a second wheel provided on each of the left and right and axially attached to contact the side surface of the concave portion,
The lifting device according to claim 3, further comprising a third wheel pivotally attached to a rear surface of the concave portion. 6. A support projection made of an elastic body that supports the table at the lower limit position is provided on an upper surface of the installation table, and a stand for loading the object to be lifted is separately provided beside the installation table. At the same time, the upper surface of the table is located slightly above the lower limit position of the table, a moving wheel is provided at a lower portion of a rear surface of the column, and a moving handle is provided at an upper portion of a rear surface of the column. Item 6. The lifting device according to Item 5. 7. The control device according to claim 1, wherein the second timer is operated after the detection device detects the placement of the object on the table at the lower limit position, and the elevating drive device is activated after a timer set time has elapsed. 7. The lifting apparatus according to claim 6, wherein the controller is controlled so as to raise the table.