JPS5836900A - Synchronous expansion mechanism for lifting gear - 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 The present invention is directed to a 500-meter-high vehicle that is used for lifting workers or materials and lowering unnecessary parts for work at high places.
1 Regarding the lowering equipment, in particular, regarding the lowering equipment, in which a pair of middle booms are pivotally supported in an X-shape, and each middle boom has an upper boom and a lower boom that extend and contract in the axial direction, the upper and lower booms are When the middle boom is extended, rotate the middle boom 1.
! The present invention relates to a synchronized expansion and contraction mechanism for a lifting device that allows each set of booms to be controlled by the same amount of expansion and contraction when moving from one side to the other.

4-way construction, painting, etc. in high places such as highways, building construction, etc.
For repairs, a lifting device is used to lower the R-adjacent R.
It was descending. In this conventional elevating device, a pair of arms are pivoted at the center to form one phase, and a plurality of sets of arms are vertically connected in a pantograph-like manner 11? i
In order to increase the maximum height of the lifting device, it was necessary to increase the length of each arm or increase the number of connected arms.

For this reason, if the rising height is set high, the height of the 4-descending device with the telescopic mechanism folded will be high<<k.
If the worker rides on the lifting platform or loads the negative phase (
The work of lowering it down was troublesome. For this reason, an arm-up mechanism has also been devised in which a plurality of booms are telescopically inserted into the inside of the arm so that one arm can extend in its length direction. However, with this configuration, it is difficult to regulate the amount of expansion and contraction of each set of booms, and it is difficult to control the upward and downward movements of the IiV stand (:11). It was often lifted and lowered diagonally, making it impractical for practical use.

In view of the above-mentioned drawbacks, the present invention controls the amount of extension and contraction of each set of booms, so that each set of booms has the same amount of extension and contraction aI'+'', and lifts and lowers the platform vertically. Sa U
This provides a synchronous expansion/contraction Ia4m of a lifting device that can

An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 in the figure is a 1-rack vehicle body, and front wheels 2 and rear wheels 3 are supported on the front, rear, left, and right sides of the vehicle body 1, respectively, and a driver's cab 4 is installed above the front wheels 2. , Zarani, car body 1
Araras 1 to riggers 5 are fixed to the left and right sides of the center and rear end, respectively. On the upper surface of the vehicle body 1, an armrest and T-truck mechanism 6 is placed, and a lifting platform 7 is fixed to the upper part of the lifting mechanism 6, and a handrail 8 is placed around the lifting platform 7. It is lp. The elevating mechanism 6 consists of four sets of telescopic booms, and each set of telescopic booms has a configuration of 1, a middle boom 10, a lower boom 11, and an upper boom 12J.

The middle boom 10 made of two pieces of silk is connected to the intermediate fire 1 in an X-shape by a connecting shaft 13, and the lower boom 11 and the upper boom 12 have nine shafts at each end. : 1 has connecting pieces 14 and 15 fixed respectively, and the connecting piece 14 is rotatably connected to a rotation pin 1G fixed on the vehicle body 1, :'-151a It is rotatably connected to a fixed piece 17 fixed to the lower surface of the rental platform 7 and a pin. This fixed distance of 1G and fixed j117
The intervals between the two are the same, and as the telescopic boom extends in an X-shape, the vehicle body 1 and the lifting platform 7 become parallel to each other. The two middle booms 10 are arranged parallel to each other at intervals, and the inner middle booms 10 of each set are connected to the operating shaft 1B at the center of the frame. The axes of the actuating shaft 18 and the connecting shaft 13 are aligned.

11t1 Both positions close to the fixed piece 16 of the vehicle body 1 and the construction U
Hydraulic cylinders 19 are arranged between the shafts 18, respectively.
Both hydraulic cylinders 19 are arranged to form an isosceles triangle with the operating axis 18 as the apex.

Next, FIGS. 4 and 5 show the internal 4M structure of the above-mentioned telescopic boom, that is, the middle boom 10. The middle boom 10 is made by bending a thin steel plate and has a hollow section in the length direction. It has a mouth-shaped structure, and a lower boom 11 is inserted through one end of the middle boom 10 so that the store can be used freely. This lower boom 11 has a hollow cross-section made by bending a thin steel plate, and has a hollow cross-section. He is able to move around freely.

Then, a 4J fan shape is formed on both ends of the middle boom 10.1. :11
Nll supports JS20 and 21 are fixed respectively, and a pair of guide rollers 2 are attached to these shaft support pieces 20 and 21, respectively.
2.23 is rotatably supported, and the guide roller 22 is in contact with both sides of the lower boom 110 (ε), and the guide roller 23 is in contact with both sides of the upper boom 12. A gear box 24 is fixed to the throat of the boom 10 near the shaft support piece 21, and two sprocket wheels 25 and 26 are pivotally supported within this gear box 24. A chain 27 connects the tip of the boom (the innermost position in the middle boom 10) and the tip of the upper boom 12, and the chain 27 is wound around the outer circumference of the sprocket 25.2G in an S-shape. By this chain 21, the amount of expansion and contraction of the lower boom 11 and the upper boom 12 is coordinated, and the middle boom 10
Therefore, the lower boom 11 and the upper boom 12 move in and out by the same amount of expansion and contraction. :1. In addition, FIG. 5 shows a cross section of the center of the middle boom 10.
A band-shaped holder 18 is wound around and fixed to the center outer circumference of each of the holder 28, and a cylindrical connecting shaft 13 is fixed to the side surface of one holder 28, and a screw is attached to the other holder 28. The engagement piece 30 fixed at 29 is fixed, and the engagement piece 30
is fitted into the engagement groove 31 formed on the outer periphery of the connecting shaft 13.Thus, the two middle booms 10 are connected in an X-shape and are free to rotate. And concatenation @
A control ring 32 is rotatably inserted through the outer periphery of the sprocket wheel 13, and a pair of sprocket wheels 33 are fixed to the outer periphery of the control ring 32. Further, a support shaft 34 is provided on the side opposite to the connecting shaft 13 of the holder 28 of the middle boom 10.
is projected, and the operating shaft 18 is connected to this support 11134.

Next, FIGS. 6 to 9 show the lower stage, 12 stage boom 11,
The synchronizing mechanism for regulating the amount of expansion and contraction of 12 is shown in 1b. 2
The telescopic booms are arranged in parallel with each other at intervals as shown in FIGS. 6 and 7, and are close to the pivot piece 20 of the middle boom 10 of each telescopic boom. A drive section 35.3G is provided at the end. Each drive section 35
．． Chains 37 and 38 are wound between each chain 36 and the sprocket wheel 33.
A tension ball assembly 39.degree. 40, which is pivotally supported on the side surface of the middle boom 10, is in contact with the outer surface of 7.38. In addition, racks 41.42 are fixed to the connecting pieces 14 in parallel with the middle boom 10 at intervals, and each rack /11.42 is attached to the middle boom 10. Each rack 41. is located symmetrically above and below the boom 10, respectively. '42 is each drive part 35.3
6 is slidably inserted.

FIGS. 8 and 9 show the drive section 3G in detail,
The drive unit 35 also has the same configuration, except that the vertical position is reversed. Middle boom 11 Q111 support C2
A pair of support pieces 43 are fixed at intervals near N1, and a drive shaft 44 is supported between these support pieces 43.The chain 38 is attached to the outer end of this drive shaft 44. A sprocket wheel 45 around which the sprocket wheel is wound is fixed, and a pinion 4 is fixed between the support pieces 43 of the drive shaft 44, and the drive shaft 44, sprocket wheel 45, and pinion 4G all rotate at the same time. 1. The rack 42 is engaged with the pinion 46, and a support l1l fixed between the support pieces 43 is attached to the upper surface of the rack 42.
A bearing 48 which is pivotally supported at the center of the II 47 is in contact with it, and the rack 42 moves the drive unit 3G forward and backward in response to the pinion 4G.

Next, the operation of this embodiment will be explained.

First, an engine (not shown) attached to the vehicle body 1 is operated, and the engine is driven to generate hydraulic pressure. This oil pressure is supplied to the hydraulic cylinder 19. Therefore, the hydraulic cylinder 19 is extended in its length direction, and the lower boom 11 and the upper boom 12 are connected to the middle boom 10.
It acts to draw out more. At this time, each middle boom 10, which is a set of two, has a rack 41.
42 is moved in the direction of withdrawal from the drive part 35.311i, and the rack 41.42 rotates the pinion 46 in the drive part 35.36. The rotation of the pinion 46 is caused by the drive shaft 44.
to the sprocket wheels 45, each of which is driven by a chain 37,38. Each chain 37, 38 is wound around a sprocket wheel 33, and each sprocket 1-wheel 331 is fixed to the same control ring 32, so that the movement of both chains 37, 38 is synchronized, and each Chains 37 and 38 move in the same direction, sprocket wheels 45 of both drive units 35 and 36 also rotate in the same direction, and each rack/II, 42 is regulated by the binion 4G and is the same. Good product t) Move. This rack 41. /1
Since the lower booms 11 are connected to each of the lower booms 11 and 2, the racks 41 and 42 determine how each lower boom 11 can be extended by the middle boom 10, and the lower booms 11 are connected to each other by the above-mentioned linkage. The same amount of movement. Also, when the lower boom 11 extends further than the middle boom 10, it pulls the chain 21 fixed to the tip of the lower boom 11.
- Rotate the sprocket wheels 25 and 26 by rotating the sprocket wheel 27.
! while moving. Therefore, the lower end of the upper boom 12 connected to the chain 27 is pulled as the chain 27 moves, and the upper boom 12
Since the lower boom 11 and the upper boom 12 are pulled out from the m1 opening and are synchronized with the gear 27, the amount by which the lower boom 11 and the upper boom 12 are pulled out is the same. In this way, each of the lower booms 11 and the upper booms 12 are regulated in their extension by chains, sprocket wheels, etc., and each moves at the same time.

As the lower boom 11 and upper boom 12 expand, the connecting pieces 14. i5
is 10- Because the interval is constant, the middle boom 1ota connection 13
It rotates in an X-shape around , and acts to lift the lifting platform 7. In this upward movement of yl descending, each of the lower stage boots 1111 and the upper stage stage A12 extend and cover the same distance, so that they can rise only in a straight direction, and deviate from side to side to move up W. This makes it possible to raise the jacket to a predetermined height. Figure 10 shows the state in which the lifting platform 7 has been raised halfway;
The figure shows a state in which the elevating mechanism 6 is fully extended and the elevating table 7 is at its maximum height position 21.

゛Conversely, by reducing the hydraulic pressure in the t31 hydraulic cylinder 19 to lower the lifting platform 7, the lower boom 11, upper boom 12, etc. are gradually pushed into the middle boom 10 and connected. The interval between the pieces 14 and 15 is narrowed, the middle boom 10 is rotated around the connecting shaft 13, and the lifting platform 7 is lowered. At this time, as mentioned above, 27.37
．． 38. Sprocket 1~Wheel 2! i, 26°33
, 45. Rack/11.42. The lower boom 11. The upper booms 12 are each pushed into the middle boom 10 by the same 10, and the lifting platform 7 is gradually lowered straight downward.

The present invention is described in 1 and 12 of i:,; The amount can be regulated to the same level, and the lifting platform can be moved up and down in one direction (J') on the vehicle body, and it is possible to accurately move the R descent 1a with a configuration that allows J3 to move up and down and easily deviates to the right and left. 9] 1 can be used.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of the gastric lowering device d with the elevating mechanism in its lowest position, and Fig. 2 is a side view of the same example. A side view showing the state in which the side is fully extended, Figure 3.
Figure 4 is a side sectional view showing the inside of the middle boom, Figure 5 is a longitudinal sectional view of the center of the middle boom,
Fig. 6 is a plan view of the elevating mechanism, Fig. 417 is a side view of the same, Fig. 8 is a sectional view of the drive section, Fig. 9 is a side view of the same, Fig. 10 is a slightly removed elevating platform. FIG. 1...Vehicle body as a base, 6...Elevating Ia side, 7.
... Lifting platform, 10... Middle boom, 11... Lower boom, 12... Upper boom. Patent applicant Mitsuru Kishi, Hiroyo Sokujinben Sokujin Shin, Nobuo Ko, Patent attorney Susumu Toshitsuki 13-163,

Claims (1)

[Claims] A pair of internally hollow middle booms are rotatably connected in an X-shape approximately at the center of each, and each middle boom has a single boom and a lower boom that extend and retract at their respective ends. Each end of the lower boom is pivoted at intervals on the base, each end of the upper boom is pivoted at intervals on the lifting platform, and the upper and lower booms are attached to the middle stage. J is a lifting device that moves the folding panels up and down by extending and contracting the boom.
3, each middle boom is equipped with a synchronization mechanism that regulates the extension and contraction of the upper and lower booms to be the same. A synchronous expansion and contraction mechanism was installed to regulate the amount to be the same.
1. A synchronous extension/contraction mechanism for an elevating device, characterized in that the respective extension/contraction amounts of an upper boom and a lower boom that extend and contract from a middle boom are controlled to be the same.