JPH0648688A - Two-strut type lift conveyor - Google Patents

Abstract

PURPOSE:To eliminate trouble such that another article comes into contact with a carriage guide rail part to damage it in transportation or the like by providing a constitution of guiding a lift carriage by cross running rail parts recessed to the inside relating to a side surface of a strut. CONSTITUTION:A cantilever arm 5 is protrusively provided in a lift carriage 3 which can be lifted along two struts 1A, 1B vertically provided on a base board, and a guide rail 6 for guiding a conveying electric car as a load is horizontally mounted on a top end bottom side of this arm 5. The strut 1 is formed by providing a small width cross running rail part 9 in a pair of right/left short side parts, large width cross running rail part 10 in one of a pair of front/ rear long side parts and a protruding rail part 11 of mountain section part in the other, respectively in the lengthwise direction. The lift carriage 3 is lifted to be guided by fitting longitudinal and lateral direction positioning guide rollers 12, 13 and 14, 15 to each rail part 10, 11, and further connected to a counterweight 4 through a chain 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting / conveying device generally called a drop lifter or a table lifter,
That is, an elevating / conveying device used for elevating and lowering a conveying means such as a conveying train from one side of a traveling route of a different level to the other, and for loading / unloading a conveyed object, particularly an elevating carriage and a counter. The present invention relates to an elevating / conveying device having two columns for guiding weights.

[0002]

2. Description of the Related Art A conventional lifting / lowering device of this type is a lifting / lowering carriage having a square U-shape in plan view, in which guide rail square members are fixed to the right and left sides of a cylindrical pillar along the length of the pillar. In the above, a guide roller for positioning in the front-rear direction, which sandwiches the square bar for guide rails located outside of both columns from the front and back, and a guide rail for horizontal positioning, which abuts on the end surface of the square bar for guide rails, are pivotally supported.

In such a conventional structure, even if the guide rail could be integrally formed with the column,
The number of guide rollers for positioning in the front-rear direction that are pivotally supported by the lifting carriage increases, resulting in high cost.In addition, the guide rails for guiding the lifting carriage project to the outside of the pillar, so that the pillar can be transported to the installation location. At the time of work or installation work, the protruding guide rail may be damaged by contact with other objects, which may hinder the smooth vertical movement of the vertical carriage.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its features are shown by the reference numerals of the embodiments described later. The two-post type lifting / lowering conveyance device of the present invention is provided with concave groove rail portions 9 and 10 on the outer surface and the front surface of the two pillars 1A and 1B which are erected side by side, on the inner side surfaces of both pillars 1A and 1B. The protruding rail portions 11 are formed continuously in the length direction, and the raising and lowering carriage 3 which is raised and lowered along the both columns 1A and 1B by the raising and lowering drive means 18 has outer side surfaces of the two columns 1A and 1B. Front-rear direction positioning guide rollers 12 and 13 that fit into the respective groove groove rail portions 10, and left and right direction positioning guide rollers 13 that fit into the groove groove rail portions 9 on the front surfaces of the columns 1A and 1B. And 14 between them, and further in front of between the two columns 1A and 1B. The lifting carriage 3 to the counterweight 4 in conjunction lift in the opposite direction, the two posts 1A,
It is characterized in that the elevating guide rollers 16 and 17 which are fitted to the respective protruding rail portions 11 on the inner surface of 1B are pivotally supported.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2A, 1A, 1
Reference numeral B designates two columns which are erected in parallel on the substrate 2 installed on the floor, 3 designates an elevator carriage capable of ascending and descending along the columns 1A and 1B, and 4 designates both the columns. Prop 1
It is a counterweight that moves up and down between A and 1B in the opposite direction of the up and down carriage 3. An arm 5 is projectingly provided in a cantilever manner on the elevating carriage 3, and a guide rail 6 for guiding a transportation train is horizontally attached to the lower side of the tip of the arm 5. Thus, the lifting carriage 3
Is at the rising limit height, the guide rail 6 connects the upper guide rails 7a and 7b installed at a predetermined height, and when the elevating carriage 3 is lowered to the lower limit height, the guide rail 6 Is connected to the lower guide rail 8 that is erected at a predetermined height, so that the transport train that travels while being guided by the upper guide rails 7a and 7b is
The guide rails 6 of the lift carriage 3 can be used to transfer to the lower guide rails 8, or conversely, to transfer from the lower guide rails 8 to the upper guide rails 7a and 7b. Further, the transport train guided by the upper guide rails 7a and 7b can be lowered to a predetermined loading / unloading level by using the guide rail 6 of the elevator carriage 3.

As shown in FIG. 2B, each of the columns 1A and 1B is an integrally molded product of aluminum, and as shown in FIG. 2B, a narrow groove groove rail portion 9 is formed at the center position of each pair of left and right short sides, and a pair of front and rear long sides. Among the parts, a large-width groove rail part 10 is provided at the center position of one long side part, and a projecting rail part 11 having a chevron cross section is provided at the center position of the other long side part in the length direction. The two protruding rail portions 11 are vertically arranged on the substrate 2 so as to face each other inside. Then, the elevator carriage 3 is provided with both the support columns 1A and 1B.
The guide rollers 12 and 13 for positioning in the front-rear direction, which are respectively fitted to the large groove groove rail portions 10 located outside of, and the small groove groove rail portions 9 located on the front side of the columns 1A and 1B. Left-right positioning guide rollers 1 that fit together
4 and 15 are pivotally supported. Of course, each of these guide rollers 12 to 15 has a function of raising and lowering the carriage 3 as shown in FIG.
So that each of them can be held in a vertical posture.
Is axially supported at at least two upper and lower ends.

The counterweight 4 is axially supported by the elevating guide rollers 16 and 17 with flanges which are fitted to the protruding rail portions 11 located inside the columns 1A and 1B, respectively. As shown in FIG. 3, the elevating guide rollers 16 and 17 can be pivotally supported on the upper and lower ends of the counterweight 4, but in some cases, only on the lower end or the upper end of the counterweight 4. It can also be pivoted.

As shown in FIGS. 1 and 2A, an elevating and lowering drive means 18 for vertically elevating and lowering the elevating carriage 3 and the counterweight 4 in opposite directions is connected at both ends to the elevating carriage 3 and the counterweight 4. It is composed of a rope 19 for raising and lowering driving such as a chain, a drive wheel (a tooth wheel or the like) 20 engaged with the rope 19, and a motor 21 with a speed reducer for rotationally driving the drive wheel 20 in forward and backward arbitrary directions. ing. The drive wheel 20 and the motor 21 are provided on both columns 1
The hoisting and lowering rope 19 is provided at the tip end of the overhanging frame 23 that is disposed on the pedestal 22 that is erected between the upper ends of the A and 1B and that projects from the pedestal 22 to the front side in a cantilever manner. A guide wheel 24 that guides the guide wheel 24 is pivotally supported, and one end of the lifting drive rope 19 that hangs down from the guide wheel 24 is coupled to the tip of the arm 5 on the lift carriage 3 side.
The other end of the elevating and lowering rope 19 hanging between the columns 1A and 1B via the drive wheel 20 is connected to the central portion of the upper end of the counterweight 4.

Therefore, the drive wheel 20 is driven by the motor 21.
By rotating the lifting drive rope 19 forward and backward through the elevator, the lifting carriage 3 and the counterweight 4 can be raised and lowered along both columns 1A and 1B so as to move up and down in the opposite directions. The guide rail 6 attached to the lifting carriage 3 can move the transport train in the vertical direction to switch the traveling route as described above. Instead of the guide rail 6, the transport object is supported. By attaching a fork or a hanger to the lifting carriage 3, it can be used as a means for loading and unloading a transported object on a transportation train or for transferring the transported object between transporting devices of different levels.

The two columns 1A and 1B can be specifically constructed as follows. That is, as shown in FIG. 4, a pair of left and right short side portions of the column 1 and two left and right portions of each of the front and rear pair of long side portions are attached to a pair of left and right member mounting members continuous in the length direction. The concave grooves 25a to 25f,
Projected ridges 2 each having an L-shaped cross section that are integrally projected from the surface of the support
6 can be formed. The member mounting grooves 25a and 25b on both short sides are formed separately on the left and right sides of the narrow groove rail portion 9. These member mounting recessed grooves 25a to 25f are used for the unit length of the column 1A,
1B when connecting a connecting plate, when mounting a bracket for mounting a pillar on the substrate 2 to the lower ends of the pillars 1A and 1B, or a pillar 1 such as a detector or a member to be detected.
It can be used to attach to A and 1B.

The columns 1A and 1B are preferably formed in a hollow shape in order to reduce the weight and material, but in this case, the reinforcing inner wall portion 27 that divides the inner space into a plurality is integrally formed as shown in the figure. Further, at a position adjacent to the inside of both narrow groove rail portions 9 on a central axis parallel to the long side direction, a through hole 28 having a perfect circular cross section in the length direction is formed. Can be done. The through holes 28 are provided with centering pins for centering the columns 1 when the columns 1 having a unit length are butted and connected to each other in the length direction, and for centering the columns when the columns are erected on the base. It is used when fitting over a gap.

In FIG. 2B, the unused narrow groove groove rail portion 9 located on the rear surface side of both columns 1A and 1B can be omitted. Furthermore, when constructing an elevating / conveying device for handling a larger and heavier transported object, two two-post type elevating / conveying devices configured as described above are installed in parallel, and the elevating and lowering carriages of both elevating / conveying devices are arranged. 3, it is also possible to support one guide rail 6 or the object support means.

[0013]

According to the two-pillar type lifting / conveying device of the present invention which can be implemented as described above, the raising / lowering carriage is guided by the recessed groove rail portion recessed in the side surface of the supporting column. During transportation work or installation work of the support column to the installation place, there is no risk that other objects may come into contact with the carriage guide rail portion and be damaged, and the work can be easily performed.

Moreover, since the front-rear direction positioning guide roller is fitted in the groove groove rail portions located on the outer sides of both columns to perform the front-rear direction positioning, only one position requiring the front-rear direction positioning is required. It suffices to use one roller, and the number of front-rear direction positioning rollers can be reduced as compared with the case of using rollers that sandwich a protruding rail from the front and rear. Further, the left-right direction positioning rollers are fitted to the recessed groove rail portions located on the front surfaces of both columns instead of being brought into contact with the bottom surfaces of the recessed groove rail portions to which the front-rear direction positioning rollers are fitted. Therefore, the support shaft of the left-right positioning roller can be directly supported on the rear part of the lifting carriage facing the front surfaces of the columns, and the left-right positioning roller support structure is very simple. Become. Because of this, the entire lifting and lowering device can be constructed at low cost.

Further, the counterweight that moves up and down between the two columns can be stably moved up and down by preventing the forward and backward runout by the up and down guide rollers fitted to the projecting rail portions formed on the inner side surfaces of the two columns. However, the protruding rail portion that guides the counterweight compensates for the decrease in strength due to the concave groove rail portion formed on the outer surface of each strut, and the concave groove rail portion that guides the elevator carriage is at least two side surfaces. Although it is a pillar formed in, it is possible to reduce the cross-sectional size of the pillar.

[Brief description of drawings]

FIG. 1 is a front view showing the entire lifting and lowering conveyance device.

FIG. 2 is a partially cutaway side view of the entire lifting / lowering conveyance device, and FIG. 2B is a cross-sectional plan view illustrating a related structure between a column and a lifting / lowering carriage.

FIG. 3 is a vertical cross-sectional side view illustrating a related structure of the support column, a lifting carriage, and a counterweight.

FIG. 4 is a perspective view illustrating a specific structure of a column.

[Explanation of symbols]

 1A Support 1B Support 2 Board 3 Lift Carriage 4 Counterweight 6 Guide rail for transport train 7a Guide rail for transport train 7b Guide rail for transport train 8 Guide rail for transport train 9 Small groove groove rail part 10 Large width Recessed groove rail portion 11 Protruding rail portion 12 Front-rear positioning guide roller 13 Front-rear positioning guide roller 14 Left-right positioning guide roller 15 Left-right positioning guide roller 16 Counterweight lifting guide roller 17 Counterweight brim Elevating guide rollers 18 Elevating drive means 19 Elevating drive ropes for chains, etc. 20 Drive wheels (tooth wheels, etc.) 21 Motor with reduction gear

Claims (1)

[Claims] 1. A recessed groove rail portion is formed on the outer surface and the front surface of two columns vertically arranged in parallel, and a protruding rail portion is formed on the inner side surfaces of both columns continuously in the longitudinal direction. A raising / lowering carriage which is moved up and down along the both columns by the raising / lowering driving means includes guide rollers for positioning in the front-rear direction, which are fitted in the groove groove rail portions on the outer surfaces of the both columns, and front faces of the two columns. A counterweight that pivotally supports a guide roller for left-right positioning that fits into each grooved rail portion, and that further moves up and down interlockingly in the direction opposite to the up-and-down carriage between the two columns, has the inner surface of both columns. A two-pillar type lifting / conveying device in which a lifting / lowering guide roller fitted to each protruding rail is pivotally supported.