JPS61291400A - Elevator - 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] [Field of Industrial Application] The present invention relates to a lifting device that can lift personnel and materials to a high place by moving a lifting platform upward and downward above a vehicle body, and in particular, relates to a lifting device that can lift personnel and materials to a high place by moving a lifting platform upward and downward above a vehicle body. It has the same functionality as the conventional model with a simple configuration for lifting and lowering, and the gap between the top boom and the cover body can be maintained with a spacer to level the vehicle.Moreover, the hydraulic circuit between the lifting platform and the vehicle body This invention relates to a lifting device that can move hydraulic wiring connecting a spacer and a spacer at the same time.

[Conventional technology]

Lifting devices that raise and lower platforms are often used for assembly, painting, and repairs at high places such as highways and building construction, and workers and materials are placed on these platforms and lifted or lowered for work. . In this conventional lifting device, a pair of arms are pivoted at the center to make one set, and a pantograph-like extension and contraction mechanism is used in which multiple sets of arms are connected in the vertical direction (so-called scissor type). In order to increase the maximum lifting height of the lifting device, it was necessary to increase the length of each arm or increase the number of connecting arms. For this reason, when designing a lifting device that can increase the height of the lift, multiple sets of pantographs must be used, and the height of the lifting device with the telescoping mechanism folded increases, making it difficult for workers to reach the platform. The work of getting on and off the vehicle and loading and unloading materials was cumbersome. For this reason, a lifting device has been devised in which a plurality of booms are telescopically inserted into the inside of an arm so that one arm can extend in its length direction (for example, No. 134487, Patent Application No. 1910, 1982
65, etc.), this newly proposed lifting mechanism combines two sets of booms in an X shape so that they can rotate freely at the center, and two sets of boom bodies are arranged in parallel to form four upper arms. The lower arm connected the vehicle body and the platform. For this reason, the number of booms required to be used increases, the number of structural members becomes extremely large, the manufacturing and assembly becomes complicated, and the cost becomes high. In addition, there are extremely many sliding parts between the boom and the arm, and these sliding points are usually
Since sliding parts such as C nylon are attached, the number of parts that must be replaced periodically increases, making inspection and maintenance costly and cumbersome. For this reason, an elevating device has been proposed in which the boom body is made into a single piece and extends and retracts so as to form a two-figure shape when viewed from the side (Patent Application No. 957 of 1982).
97, etc.), this new one-boom elevating device uses a boom body that expands and contracts in multiple stages, so there is a step difference between each boom, making it difficult to secure a pivot point to horizontally support the elevating platform. Therefore, it was difficult to interpose a leveling mechanism between the telescoping boom and the platform. For this reason, a structure has been devised in which a spacer is slid between the uppermost boom and the cover body to support the load.

[Problem that the invention seeks to solve]

As mentioned above, a lifting device has been developed that uses a single boom body to horizontally move the lifting platform up and down. In order to connect the control panel and the hydraulic pressure source, multiple hydraulic lines are required to be connected between the vehicle body and the lifting platform. This hydraulic line (pressure rubber hose) is housed inside the boom body, and usually gets in the way as it is pulled out or taken in as the boom body expands and contracts.

[Means to solve the problem]

In the present invention, a movable vehicle body, a flat elevating platform placed above the vehicle body, and a telescopic boom that is extendable and retractable by inserting a plurality of booms disposed between the vehicle body and the elevating platform in the length direction thereof. In a lifting device that can raise and lower a lifting platform in the vertical direction by extending and contracting each boom of the telescopic boom body, the uppermost boom of the telescopic boom body is covered with this boom. A cover body is provided, and a connecting means is inserted between the cover body and the uppermost boom, and one end of the connecting means is connected to a boom other than the uppermost boom. The present invention provides an elevating device characterized in that a spacer that slides in a gap between the bodies is provided, and hydraulic wiring is provided in parallel with the linking means to communicate the elevating platform and the vehicle body.

[Effect]

When the boom body is extended, each boom is pulled out individually and the platform is lifted upwards, creating a gap between the top boom and the cover body, but the booms are pulled out from the other booms except the top boom. The spacer slides through this gap and fills the gap, which eliminates play between the cover body and the boom, so the cover body will not bend even if a load is applied to the cover body. and,
Hydraulic lines are provided in parallel to the connecting means to which the spacer is connected, and the hydraulic lines are also moved in common when the connecting means are grouped together, making it easy to organize them when storing and pulling out.

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

A front wheel 2 and a rear wheel 3 are pivotally supported on the front, rear, left and right sides of the vehicle body 1, so that the vehicle body 1 can move freely.
A power supply box 4 containing an engine, a hydraulic pump, etc. is attached to the lower part of the vehicle body 1. A pair of shaft support pieces 5 are fixed to one end of the upper surface of the vehicle body 1 at intervals, and the shaft support pieces 5
A lower boom 6 having a square cross section and a hollow interior is inserted between them, and the shaft support piece 5 and the lower boom 6 are rotatably connected by a pin 7. A pair of pin stops 8 are fixed to the left and right sides of the upper surface of the vehicle body 1 at positions opposite to the shaft support pieces 5, and between these pin stops 8 and the outside of the lower boom 6, there is a A hydraulic cylinder 9 is interposed. The tip of the lower boom 6 has a rectangular opening, and an internal hollow boom 10 having a square cross section is slidably inserted into this opening. The hollow end poom 11 is slidably inserted therethrough. A cover weight 2 having a U-shaped cross section and opening downward is fixed to the tip of the tip boom 11, and the upper inner surface of the cover body 12 is spaced parallel to the outside of the lower boom 6. A gap is formed between 11 and the cover body 12 such that the lower boom 6 can be inserted therethrough. The lower boom 6 is set to have a length approximately equal to the length of the vehicle body 1, and the middle boom 10 and front boom 11 are also set to have approximately the same length as the vehicle body 1. 10. A telescopic boom body 13 is formed by the front boom 11.

Reference numeral 16 denotes a flat lifting platform having almost the same floor area as the vehicle body 1. A pair of shaft supporting pieces 14 are fixed to one end of the lower surface of the lifting platform 16 at intervals. A cover body 12 is inserted into the shaft supporting piece 14 and the cover body 1.
2 and is rotatably connected by a pin 15. Further, a pair of pin stoppers 17 are fixed to each side of the lower surface of the lifting platform 16 at a position opposite to the shaft support piece 14.
A hydraulic cylinder 18 is interposed between each bottle stopper 17 and both sides of the cover body 12, and a handrail 19 is installed around the upper surface of the lifting platform 16.

FIG. 5 shows the internal configuration of the above-mentioned telescopic boom body I3, in which the lower boom 6, the middle boom 10, and the front boom 11 are inserted in a telescopic manner so that they can be extended and retracted.

The cover body 12 attached to the tip of the front boom 11 has an upper side having a length of about 273 of the total length of the lower boom 6 and a lower side of about 173, and the left side in the figure is formed diagonally. A bottle hole 21 for connecting the hydraulic cylinder 9 is located at the upper part of the lower boom 6 at a position about 1/3 from the left end.
A bottle hole 22 for directly connecting a hydraulic cylinder is provided at the lower part of the cover body 12 at a position about 1/2 of its total length. Further, a pivot support 23 is fixedly fixed to the left end position of the upper part of the cover body 12, and a roller 24 that contacts the upper surface of the lower boom 6 is pivotably supported within the pivot support 23. A chain 41 is inserted between the upper outer side of the tip poom 11 and the inner side of the cover body 12, and one end of the chain 41 is connected to the upper end of the middle boom 10 (position C at the right end in the figure). The chain 41 is pulled out from the upper end of the cover body 12 and is folded double over the upper surface of the cover body 12, and its terminal end is connected to the lower surface of the lifting platform 16. A plurality of rollers 42 as spacers made of a slippery material such as MC nylon are connected to the lower part of the chain 41 at intervals.

A cable bear 43 is provided in parallel with this chain 41, which is a bundle of a plurality of hydraulic rubber hoses. It is connected with. A cable receiver 52 is positioned on the lower surface of the lower boom 6 parallel to the lower boom 6 at an interval.
The lower boom 6 and the cable receiver 52 are connected by branches 53 and 54. A lower cable carrier 55 is placed on this cable receiver 52, one end of the lower cable carrier 55 is connected to the upper end of the cable receiver 52, and the other end is connected to the lower surface of the upper end of the middle boom 10. , lower cable track 5
5 and the cable carrier 43 are communicated within the middle pool 10.

6 shows a cross section at the right end A in FIG. 5, and FIG. 8 shows an enlarged view of the upper left part in FIG.

Auxiliary plates 26 are fixed to both sides of the tip of the middle boom 10 (right end in FIG. 5), and a support shaft 28 is fixed to the lower part of the auxiliary plates 26. On the left and right sides, rollers 29 that come into contact with the lower outer circumference of the front boom 11 are rotatably supported, and in the center of the support shaft 2 is a chain (not shown) that connects the lower boom 6 and the front boom 11. ) is a pivot support. Further, the auxiliary plate 26 is provided with a slider 31 that comes into contact with the outside of the front boom 11 and a slider 32 that comes into contact with the inside of the cover body 12.

Further, a rail 44 made of MC nylon or the like is fixed to the upper and outer surface of the front boom 11 in parallel with the length direction of the front boom 11, and the chain 41 is brought into contact with the upper surface of the rail 44 so that it can be transferred. It is. And chain 4
L-shaped angle pieces 47 are connected to both sides of 1, and a U-shaped shaft support 46 that opens upward is fixed between the angle pieces 45. The roller 42 is supported by a shaft 47.

In addition, a cable holder 48 is attached to one angle piece 45 slightly horizontally, and a hydraulic rubber hose 49 is held on the lower surface of the cable holder 48. 43 is formed.

Next, FIG. 7 shows a cross section taken along line B-H in FIG. 5, and a support piece 33 is fixed to the inside of the shaft support 23 provided at the top of the tip of the cover body 12 in parallel with the side surface. A pin 34 is installed between the side surface of the shaft support 23 and this support piece 33, and the roller 24 is supported on each pin 33. A liner 35 that comes into contact with the side surface of the lower boom 6 is fixed to the side surface of the cover body 12, and the middle boom 10 is attached to the lower boom 6.
The liner 36 that comes into contact with the outer periphery of the sleeve is firmly fixed. A sprocket wheel 42 is pivotally supported on the lower inner wall of the front boom 11.
A chain 43 is wound around 2.

Next, the operation of this embodiment will be explained.

Figures 2 and 3 show the lifting platform 1 with the lifting boom body 13 scaled down.
6 is lowered to the lowest position. In this state, a worker gets on the lifting platform 16, materials are placed thereon, and the lifting platform 16 is raised. To raise the lifting platform 16, the engine in the power supply box 4 is activated to generate hydraulic pressure, and the hydraulic cylinders 9 and 18 and the telescopic hydraulic cylinder (not shown) housed in the front boom 11 are supplied with hydraulic pressure. When hydraulic pressure is supplied to the hydraulic cylinders for expansion and contraction, the middle boom 10 is slid and pulled out from the lower poom 6, and the front boom 11 is moved from the middle boom 10.
The pins 7.15 are slid further and pulled out to increase the distance between the pins 7.15. Also, as the hydraulic cylinder 9 expands, the pin 7
The lower boom 6 is rotated around , and the telescopic boom body 13
A telescopic boom body 1 is operated by a hydraulic cylinder housed in a number boom 11 that lifts the boom body 1 so as to tilt it with respect to the vehicle body 1.
Telescopic boom body 13 with extension speed of 3 and hydraulic cylinder 9
When the tilting speeds of are synchronized, the pin 15 of the cover body 12 rises perpendicularly to the vehicle body 1. Further, the elevating table 16 rotates around the pin 15 due to the extension force of the hydraulic cylinder 18, acting to enlarge the angle between the cover body 12 and the elevating table 16, and synchronizing the amount of extension of the hydraulic cylinders 9 and 18. Therefore, the lifting platform 16 becomes parallel to the car body 1, and the car body 1
, the telescopic boom 13, and the lifting platform 16 are formed into a two-shape when viewed from the side. When the lifting platform 16 has risen to a predetermined height position, the operator stops the operation of each hydraulic cylinder 9.18 and the hydraulic cylinder in the tip pool 11, and the lifting platform 16
is held at that height, allowing work such as assembly, repair, and painting to be performed at height.

During the telescoping operation of the telescoping boom body 13, the rollers 24 come into contact with the upper surface of the lower boom 6 and move while shifting. Since there is a gap between the cover body 12 and the lower boom 6, middle boom 10, and front boom 11, looseness will occur and there is a risk of deformation due to the load. 18 to the bottle hole 22, and the cover body 12
A stress that bends it downward will be applied. However, as mentioned above, since the roller 24 moves on the upper surface of the lower boom 6, the load is supported by the roller 24 and transmitted to the lower boom 6, so the cover body 12 does not deform and lifts the platform 16. Boom 1 while maintaining height
1 and extends upward. If the lower boom 6 continues to move relative to the cover body 12, the upper end of the lower boom 6 will eventually pass the lower surface of the roller 24, but when the telescoping boom body 13 expands and contracts, as described above, the middle boom 10 slides away from the upper end of the tip boom 11 and is pulled out. Therefore, the chain 41 connected to the tip C of the middle boom 1° also has a loose length part on the top of the cover body 12 that is pulled out from the top of the tip boom 11. and the cover body 12. This chain 41 moves smoothly to slide on the rail 44,
At the same time, the roller 42, which is fixed to the chain 41, is also driven. Therefore, each roller 42 that is fixed to the chain 41 also moves in the moving direction of the middle boom 10 along with the middle boom 10, and the rollers 42 move into the space formed between the front boom 11 and the cover body 12. Move and roller 4
2 is transferred while contacting the inner wall of the cover body 12, and the load applied to the cover body 12 is transferred by this roller 4.
2. The front boom 11 via the chain 41, rail 44, etc.
It will be transmitted to the upper surface. In this way, the roller 24
Even if the cover body 12 is separated from the lower boom 6, the load of the cover body weight 2 will be supported by each roller 42, and the cover body 12 will not be deformed by the load of the lifting platform 16.

At this time, since the cable holder 48 also moves within the cover body 12 following the chain 41, the hydraulic rubber hose 49
Similarly to the chain 41, the chain 41 is pulled into the cover body 12, and the cable carrier 43 is pulled in by the same length of slack as the chain 41.

FIG. 9(a) shows the initial state of expansion, in which the chain 41, roller 42, and cable 43 are loosely placed on the upper surface of the cover body 12, and the load applied to the bottle hole 22 is Supported by 24. Further, the lower cable carrier 55 is folded double and placed on the cable receiver 52.

Next, as the extension operation of the telescopic boom 13 progresses, the lower boom 6 will be pulled out from the cover body 12, and the roller 2
4 will be separated from the upper surface of the lower boom 6 (see FIG. 9 (b)), but at this time the roller 42 has already been pulled out by the middle boom 10 between the front boom 11 and the cover body 12, and the roller 42 will be removed from the bottle hole. The load applied to the cover body 12 is transmitted to the cover body 12 via the rollers 42 etc.
2 and the tip pool 11 are maintained parallel to each other. Further, the lower cable carrier 55 is pulled upward at the same time as the middle pool 10 is pulled out, and the slack portion thereof is sequentially pulled out from the cable receiver 52.

When the middle boom 10 is further pulled out and the distance between it and the tip of the front boom 11 increases, these rollers 42 are arranged between the front boom 11 and the cover body 12 at equal intervals and are transferred. are successively pulled out from the middle boom 10 and finally stop in the state shown in FIG. 9(c), which is the maximum extension position of the telescoping boom body 13. At this time, the entire length of the lower cable carrier 55 is not pulled out from the cable receiver 52, and a portion thereof remains on the cable receiver 52. During this operation, the cable carrier 43 attached to the chain 41 is also drawn into the cover body 12 at the same time.

In this way, the contact transfer between the rollers 24 and 42 is switched, and the telescopic boom body 13 slides smoothly.

Also, when the telescopic boom body 13 is contracted, it moves so that the front boom 11 is inserted into the middle boom 10,
The chain 41 moves in the opposite direction to the above, and the chain 41
are pushed out from the upper end of the cover body 12 and placed on the upper surface of the cover body 12 one after another.

Then, when the upper end of the lower boom 6 approaches the lower end of the cover body 12, the roller 24 begins to move on the upper surface of the lower boom 6. In this manner, when the telescopic boom body 13 is contracted, the operations are performed in the order shown in FIGS. Further, as the middle pool 10 is reduced, the lower cable carrier 55 is also pushed down, folded onto the cable receiver 52, and sequentially stored.

In this embodiment, the roller 42 as a spacer is formed into a cylindrical shape, but the same effect can be achieved even if the spacer is square or polygonal as long as it fills the gap between the cover body 12 and the front boom 11. Of course it is possible.

〔Effect of the invention〕

Since the present invention is configured as described above, the load of a large lifting platform approximately the same size as the vehicle body is supported by the cover body, and the load applied to the cover body is successively transmitted to the telescopic boom body by the rollers and spacers. be able to. Therefore, even if a step formed by multiple booms of the telescopic boom body occurs during operation, the spacer slides to eliminate the step, ensuring that the load on the platform is maintained even when the telescopic boom body is extended for a long time. can be supported. Furthermore, since the connecting means connecting the spacers and the cable carrier are shared, it is easy to organize long chains and cable carriers, and they do not get in the way during work.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a side view showing the elevating platform lowered to the lowest position, Fig. 3 is a front view of the same, and Fig. 4 is the elevating platform shown in the lowermost position. Fig. 5 is a side view showing the internal structure of the telescopic boom body; Fig. 6 is a cross-sectional view taken between A-A in Fig. FIG. 8 is an enlarged sectional view showing the vicinity of the roller wrapped around the front boom, and FIG. 9 is an explanatory diagram showing the operation of the telescopic boom body. 1--Vehicle body, 6--Lower boom, 10--Middle boom, 11- Front boom, 12- Cover body, 1
3...-Telescopic boom body, 24...-Roller,
41...-Chain, 42--Roller as spacer, 43.55...-Cable bear. Figure 1 Figure 2 Figure 3 Figure 7

Claims (1)

[Claims] It consists of a movable vehicle body, a flat elevating platform placed above the vehicle body, and a telescopic boom body placed between the vehicle body and the elevating platform, which is extendable and retractable by inserting multiple booms in its length direction. In a lifting device that can raise and lower a lifting platform in the vertical direction by extending and contracting each boom of a telescoping boom body, a cover body is provided on the topmost boom of the telescoping boom body so as to cover this boom. A connecting means is inserted between the cover body and the uppermost boom, and one end of the connecting means is connected to a boom other than the uppermost boom. An elevating device characterized in that a sliding spacer is provided, and hydraulic wiring is provided in parallel with the linking means to communicate the elevating platform and the vehicle body.