JP2712983B2 - Counterweight device for lifting transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting / lowering device generally called a drop lifter or a table lifter.
In other words, in an elevating transport device used for lifting and lowering a transport means such as a transport train from one of the traveling paths of different levels up and down to the other, and for loading and unloading an object to be transported, the reverse of the lifting carriage The present invention relates to a counterweight device that is suspended so as to move up and down in conjunction with a direction.

[0002]

2. Description of the Related Art A counterweight device of this type of lifting and lowering transfer device is disclosed in, for example, Japanese Utility Model Laid-Open No. 48-578.
No. 61, a plurality of weights are sandwiched between a base and a suspending member in a stacked state, and the suspending member is fastened to the base with long bolts and nuts penetrating the weight group. Was composed.

[0003] In such a conventional counterweight device, the number of weights can be adjusted. However, when the number of weights is adjusted, the distance between the base and the suspension member changes. In the case where the weight device and the upper and lower drive chains are to be linked and connected in a circulating manner, the length of one of the upper and lower chains must be adjusted.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its features are indicated by reference numerals in the embodiments described later. The counterweight device of the lifting and lowering transport device of the present invention is a counterweight device 6 that is hung by an elevating drive hanging rope 10 a such as a chain so as to move up and down in the opposite direction to the elevating carriage 5. In order to fasten the suspension bolts 26 and 27 protruding from the base 25, the plurality of weights 28 fitted to the suspension bolts 26 and 27 in a required number of stacked states, and the weight 28 located at the upper end. Fastening nuts 30 and 31 screwed into the suspension bolts 26 and 27, and the upper ends of the suspension bolts 26 and 27 at fixed positions above the fastening nuts 30 and 31. And a suspension member 34 detachably attached to the suspension member 34. The suspension member 34 is suspended by the lifting and lowering suspension cable 10a, and a guide roller for lifting and lowering is provided on at least one of the suspension member 34 and the base 25. 2
It is characterized by the fact that 4 is supported.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The lifting / lowering transport device shown in FIG. 1 is mounted on transport guide rails 1a and 1b which are installed at a predetermined height above the floor. It is used to transfer a guided traveling train (not shown) to a loading / unloading level of a conveyed object or to another low-level traveling route. Two pillars 3 and 4 erected on the substrate 2 installed on the board, one lifting carriage 5 that can be raised and lowered along the both pillars 3 and 4, and can be raised and lowered between the two pillars 3 and 4 Counterweight device 6 and the lifting carriage 5
And a lifting / lowering drive means 7 for raising and lowering the counterweight device 6 in conjunction with each other in opposite directions.

A guide rail 8 connected to the transport guide rails 1a and 1b when the elevator carriage 5 is at the ascending limit position is attached to the elevator carriage 5 via a frame 9 projecting from the elevator carriage 5 in a cantilever manner. The transport train that has moved onto the guide rail 8 can be transported up and down to a predetermined low level by lifting and lowering the lift carriage 5.

As shown in FIG. 2, the lifting drive means 7 includes the lifting carriage 5 (specifically, the frame 9).
The upper and lower two circulating-type lifting and lowering drive chains (eg, chains) 10a and 10b, which are stretched to interlock and raise and lower the counterweight device 6 in opposite directions, and the lower end U of the lower suspension line 10b. Driving wheel (tooth ring, etc.) engaging with the turn part
11 and a motor 12 with a speed reducer for driving the rotation. Reference numeral 13 denotes a guide wheel (a tooth wheel or the like) for engaging a lower U-turn portion of the lower suspension cable 10b with the drive wheel 11. As shown in FIGS. 1 and 2, an upper frame 15 having an overhang frame 14 extending in a cantilever manner above the frame 9 is attached between upper ends of the columns 3 and 4. Guide wheels (such as tooth wheels) 16 and 17 for guiding the upper suspension cable 10a are supported by the upper frame 15 and the overhanging frame 14.

The two columns 3 and 4 have the same structure of an aluminum integrally molded product, and as shown in FIG. 3, small width groove rail portions 18 and 19 are provided at the center positions at both ends in the long side direction.
However, at the center position of one end in the short side direction, a large width groove rail portion 20 is provided.
And a protruding rail 2 at the center of the other end in the short side direction.
1 are each formed continuously in the length direction.

The columns 3 and 4 configured as described above are provided in parallel on the substrate 2 such that the protruding rails 21 face each other on the inner side. Guide rollers 22 for positioning in the front-rear direction, which are respectively fitted to the large groove rails 21 located outside the columns 3, 4, and the small groove rails 18, located in front of the columns 3, 4 respectively. The right and left positioning guide rollers 23, which fit in the columns 19 and 19 (the same narrow groove rails 18 or 19 can be used in the columns 3 and 4 because the columns have no top and bottom), are supported by the shafts. , And both of the columns 3, 4
A guide roller 24 with a groove for elevating and lowering, which is fitted to a protruding rail portion 21 located inside the columns 3 and 4, respectively, is supported by the counterweight device 6 disposed therebetween. Each guide roller 22 on the lifting carriage 5 side,
Numerals 23 are pivotally supported at two positions on the upper and lower ends of the lifting carriage 5 so that the lifting carriage 5 can be held in a vertical posture.

The counterweight device 6, as shown in FIG.
4, two suspension bolts 26, 27 erected vertically from two places on the left and right sides of the base 25, and the required number of pieces are respectively fitted to the suspension bolts 26, 27 in a stacked state. A plurality of weights 28 to be combined, and the two suspension bolts 26,
27, and two rows of weight groups 28A, 28B are connected to the base 2 via the pressing plate 29.
A fastening nut 3 screwed into the intermediate screw shaft portions 26a, 27a of the respective suspension bolts 26, 27 to fasten to the fifth side.
0, 31 and nuts 3 which are detachably fitted to upper end small diameter shaft portions 26b, 27b of the respective suspension bolts 26, 27.
And a suspension member 34 fixed by two or 33. One end of the upper suspension rope 10a is connected to the upper side of the center position of the suspension member 34 by connecting means 35, and the lower side of the base 25 is positioned below the center position. One end of the lower suspension cable 10b is connected to the connecting means 36.
Are linked by

The base 25 is provided with hanging bolts 26,
The nut 27 is fixed to the suspension bolts 26 and 27 by nuts 37 and 38 in a state of being fitted to the lower end small diameter shaft portions 26c and 27c. That is, as is clear from the figure, the base 2
5 and the suspending member 34 are the same and are configured symmetrically to the left and right, and the two suspension bolts 26 and 27 are also identical and configured to be vertically symmetrical. Therefore, the base 25 can be arranged on the upper side as the suspension member 34, and the suspension member 34 can be arranged on the lower side as the base 25. In addition, the hanging bolts 26 and 27 can also be fixed at one end to the base 25 side, so that assembly is easy.

Each of the weights 28 is a thick plate having a rectangular planar shape having a through hole in the center thereof through which the suspension bolts 26 and 27 penetrate, and a rectangular shallow rectangular lower surface. A dish-shaped concave portion 39 is formed, and a rectangular shallow convex portion 40 is formed on the upper side surface of the upper weight 28 so as to just fit in the dish-shaped concave portion 39. In addition, the base 25
On the upper side, a convex portion 41 formed by fixing a rectangular thick plate corresponding to the convex portion 40 by welding or the like is provided.

The counterweight device 6 constructed as described above is fitted to the suspension bolts 26, 27 within the length of the intermediate screw shaft portions 26a, 27a provided on the suspension bolts 26, 27. By adjusting the number of stacked weights 28, the overall weight of the counterweight device 6 can be adjusted. Since the holding plate 29 is used, the number of weights stacked in each of the weight groups 28A and 28B is the same. However, when using the washer for each of the weight groups 28A and 28B without using the holding plate 29,
It is also possible to change the number of stacked weights 28 for each weight group 28A, 28B. Thus, even if the number of weights 28 stacked is changed, the overall height of the counterweight device 6, that is, the distance between the base 25 and the suspension member 34 does not change. In addition, each weight 28
The hanging bolts 26, 27 are attached to the base 25 by fitting the recess 39 to the projection 40 and the projection 41 on the base 25.
Relative rotation around is prevented. Therefore, it is not necessary to use a large-sized one in which the weight 28 is fitted over the two suspension bolts 26, 27, and a rectangular, small-sized, easily handled weight 28 can be used.

Next, the suspension cable 10a for the suspension member 34
As shown in FIG. 5, a bearing member 43 is pivotally supported at the center position of the suspension member 34 by a horizontal support shaft 42 in the front-rear direction so as to be able to swing left and right, and is mounted on the bearing member 43. The connecting member 4 is connected to the horizontal support shaft 44 in the horizontal direction on the left and right by connecting pins 46a and 46b to the ends of two chains 45a and 45b constituting the hanging cable 10a.
7a and 47b are connected via a spherical bearing 48a and 48b, respectively, so as to swing freely within a certain range. Therefore, the suspension cable 10a and the suspension member 34 are
Swinging motion of the bearing member 43 with respect to the suspension member 34 in the left and right directions around the suspension member 34, and the connecting members 47a, 47 with respect to the bearing member 43 around the spherical centers of the spherical bearings 48a, 48b.
Since it is possible to relatively swing in any direction together with the swinging movement of b, the lifting and lowering movement of the counterweight device 6 is performed smoothly and smoothly.

As shown in FIG. 4, the lower suspension cable 10b
The two chains 49 are also similar to the upper suspension cable 10a.
a, 49b, and the lower suspension cable 1
The connecting means 36 for connecting the base 0b to the base 25 of the counterweight device 6 also has the same structure as the connecting means 35, and a description thereof will be omitted.

The counterweight device 6 and the suspension cable 10a
The connecting means 35 for connecting the upper and lower carriages 5 and the upper suspension cable 10a shown in FIG. 2 can also be used as the connecting means 50. The connecting means 51 between the lifting carriage 5 and the lower suspension cable 10b can be configured as shown in FIG. The connecting means 51 includes an elevating shaft 52 having two lower chains 49a and 49b constituting the lower suspension cable 10b connected to a lower end thereof, and is externally fitted to an intermediate portion of the elevating shaft 52 so as to be capable of ascending and descending. Spherical washer 5 which became spherical
3, an annular spherical receiving seat 54 fixed to the lifting carriage 5 side to support the lifting shaft 52 via the spherical washer 53 so that the lifting shaft 52 can perform a vertical movement and a swinging movement within a certain range. The nut 5 is attached to the upper end screw shaft portion 52a of the lifting shaft 52
5, a detection target plate 56 attached so as to be height-adjustable via 5,
Spring receiving seat 5 arranged below nut 55
A compression coil spring 58 externally fitted to the elevating shaft 52 between the pressure plate 7 and the spherical washer 53;
6 is comprised of a proximity switch 59 for detecting the upward movement. A connecting member 60 connects the two chains 49a and 49b to the elevating shaft 52. The two chains 49a and 49b are connected to lower ends of the connecting members 60 by connecting pins 61a and 61b. A central portion of the upper end of the member 60 is connected to the lower end of the elevating shaft 52 by a vertically elongated hole 62 formed at the lower end of the elevating shaft 52 and a connecting pin 63 penetrating therethrough.

According to the connecting means 51, an appropriate tension is always applied to the lower suspension cable 10b by the compression coil spring 58. As the suspension cable 10b is extended, the lifting shaft 52 is moved by the spring 58. When the amount of rise is equal to or more than a certain value, in other words, when the extension of the suspension cable 10b is equal to or more than a certain value, the detected plate 56 which rises integrally with the elevating shaft 52 is moved to the proximity switch. 5
9 detects the suspension cable 10b.
It is possible to automatically detect that the elongation has exceeded a certain value. Further, the spherical washer 53 and the annular spherical receiving seat 5 are provided.
Since the lifting shaft 52 can swing in any direction by the interposition of the lifting shaft 4, the relative swing between the lifting carriage 5 and the lower suspension cable 10b can be smoothly absorbed.

Note that the lower suspension cable 10b shown in FIG. 2 can be omitted, and the lifting carriage 5 and the counterweight device 6 can be suspended in a fishing bottle manner using only the upper suspension cable 10a. In this case, the guide wheels 16 for guiding the upper suspension cable 10a may be configured to be rotationally driven by a motor with a reduction gear. Also, in any case where the lifting carriage 5 and the counterweight device 6 are driven to move up and down in an interlocked manner, the lifting guide roller provided in the counterweight device 6, that is, the grooved guide roller 24 in the above embodiment, is provided on the base. It is also possible to pivotally support only one of the suspension member 25 and the suspension member 34.

[0019]

The counterweight device of the present invention can be embodied as described above. According to the counterweight device of the present invention, a plurality of stacked weights are connected to a base and a suspension member. It is not something that is directly sandwiched between and fixed, but between a weight fastening nut screwed into the middle of a suspension bolt connecting the two at a fixed interval and the base, a plurality of sheets stacked on the base. Since the weights are fastened and fixed, even if the weight of the entire counterweight device is adjusted by changing the number of weights to be stacked, the distance between the base and the suspension member, that is, the height of the entire counterweight device, changes. Does not occur.

Therefore, as shown in the embodiment, even when the counterweight device is interposed in the middle of the circulating type lifting and lowering suspension rope, the number of weights used in the counterweight device is changed as described above. Sometimes, it is not necessary to adjust the length of the lower suspension cable connected to the lower side of the counterweight device.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a lifting and lowering transport device.

FIG. 2 is a schematic side view showing the lifting drive means of the lifting carriage and the counterweight device.

FIG. 3 is a cross-sectional plan view showing a relationship between a column, a lifting carriage, and a counterweight device.

FIG. 4 is a partially cutaway front view showing details of a counterweight device.

FIG. 5 is a partially cutaway front view showing a connecting means between the counterweight device and the upper suspension cable.

FIG. 6 is a partially cutaway front view showing a connecting means of the lifting carriage and the lower suspension cable.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 3 Prop. 4 Prop. 5 Elevating carriage 6 Counterweight device 7 Elevating drive means 10a Upper elevating drive hanging rope 10b Lower elevating driving hanging rope 24 Guide roller with groove for elevating and lowering of counterweight device 25 Base 26 Hanging Bolt 26a Intermediate screw part of hanging bolt 27 Hanging bolt 27a Intermediate screw part of hanging bolt 28 Weight 29 Pressing plate 30 Weight fastening nut 31 Weight fastening nut 32 Hanging member fixing nut 33 Hanging member fixing nut 34 Hanging member 35 Connecting means between upper suspension cable and suspension member 36 Connection means between lower suspension cable and base

Claims (3)

(57) [Claims] 1. A counterweight device which is suspended by a lifting drive suspension rope so as to move up and down in a direction opposite to a lifting carriage, comprising: a base; a suspension bolt protruding from the base; A plurality of weights fitted to the suspension bolts in a required number of stacked states, a fastening nut screwed onto an intermediate screw shaft portion of the suspension bolt to fix the weight group to the base side, A suspension member detachably attached to a fixed position at the upper end of the suspension bolt by a nut, suspending the suspension member by the lifting drive suspension cable, and moving the suspension member up and down to at least one of the suspension member and the base. Counterweight device of a lifting and lowering transport device, which supports a guide roller for the robot. 2. The method according to claim 1, wherein the base and the suspension member are made of the same material, and a structure for fixing the suspension bolt to the base is the same as a structure for fixing the suspension member to the suspension bolt.
A counterweight device for the vertical transport device according to claim 1. 3. Each of the weights is provided with a concave portion on the lower side and a convex portion on the upper side thereof, and a convex portion is provided on the upper side of the base so as to be fitted in the lower concave portion of the lower weight. 3. The method according to claim 1, wherein when the weights are stacked on the base, the upper and lower concave portions and the convex portions engage with each other to prevent the weight from rotating around the suspension bolt. Counterweight device for lifting and lowering transfer equipment.