JPH0240076Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a relatively small lifting device used at construction sites and the like. The elevating work device of this invention can perform various tasks while riding on a platform that can be raised and lowered, and can also be used as a lifting machine for lifting and lowering various materials.

[Conventional technology]

Conventional lifting devices of this type include a base,
A guide frame erected on the base, an elevating frame that can move up and down guided by the guide frame, a hoist installed on the base, and a winding machine whose tip is unwound from the winding drum of the hoist and whose tip is the elevating frame. One example is one consisting of cables attached to a frame. One example is the utility model registration number 1567583 (Utility Model Registration No. 1567583) developed by the inventor of this application
59-5040) that have already been registered.

[Problem that the invention attempts to solve]

The lifting device of this invention was developed with the aim of making it possible for a person to work on a lifting frame to a higher position than conventional ones using only one hoisting machine. It is.

[Means to solve the problem]

This invention is based on the above-mentioned conventional elevating work device, in which the elevating frame is composed of a main elevating platform located below and a work platform located above, and a plurality of The link assembly is connected by an extendable link assembly, the link assembly is provided with a holding member for maintaining the extended state, and the guide frame and the work platform are provided between the guide frame and the work platform to selectively restrict the descent of the work platform. The invention is characterized in that it is provided with a stop member.

This invention will be explained below based on embodiments shown in the drawings.

In Fig. 1, 1 is a base with the required number of wheels 2 at the bottom of both sides, 3 is a foldable outrigger provided at the four corners of the base 1, and 4 is a base 1 installed upright. A guide frame having an arbitrary shape, 5 a lifting frame that can be moved up and down guided by the guide frame 4, 6 a hoist fixed to the base 1 via a mounting frame 7, 8 a hoist 1 The cables 9, 9a, such as wire ropes, chains, etc., which are unwound from the winding drum and whose tips are attached to the lifting frame 5, are the required number of pulleys for guiding the cables 8. The upper pulley 9 is attached to a support column 10 erected at the center of the front and rear sides of the base 1, and the lower pulley 9a is attached to the base 1 or the mounting frame 7. Reference numeral 11 denotes a fixed ladder erected at the front of the base 1, and the upper part of the ladder 11 is fixed to a horizontal member 4c extending over the main pillar 4a at the corner of the guide frame 4. Lifting work devices having such a configuration are conventionally well known.

In this invention, the above-mentioned elevating frame 5 is combined with a main elevating platform 51 located below and a work platform 5 located above.
2, and the main platform 51 and the workbench 52 are connected by an extendable link assembly 53 consisting of a plurality of links 53a. Each link 53a is connected at both ends or in the center by a pivot, that is, a connecting shaft 54, and the pantograph-shaped link assembly 5
It is formed in 3. This link assembly 53 is normally provided symmetrically on both sides of the lift frame. Some of the connecting shafts 54 are attached to the link assemblies 5 on both sides.
It is preferable to use the links 3 and 53 in common, as this increases the stability of the link assembly during expansion and contraction.

In such an elevating frame 5, guidance by the guide frame 4 is performed using an elevating main stand 51, and the tip of the cable 8 is engaged with the elevating main stand 51. Each guide member 12 has one end fixed to the main platform 51, and the other end is slidably engaged with the main pillar 4a of the guide frame 4. 52a is a handrail provided on the workbench 52, and it is convenient if it is foldable.

Reference numeral 13 denotes a holding member for holding the above-mentioned link assembly 53 in its extended state when it is extended as shown in FIGS. 3 and 4. The holding member 13 in the embodiment has its base end pivoted on a connecting shaft 54 below the link 53a, and as shown in FIGS. 1 and 2, it hangs down due to its own weight when the link assembly 53 contracts. ing. In this state, the holding member 1
This is the state of No. 3 when not in use. The state in which each holding member 13 is used is clearly shown in FIGS. 5 and 6.
As shown in FIGS. 3 and 4, the link assembly 5
3 is extended, the holding member 13 is rotated by hand, and its tip is inserted into a U-shaped stopper 14 fixed on the main platform 51, and the holding member 13 is inserted through the stopper 14. The distal end portion of the holding member 13 is immovably restrained by the bolt 15 . When the retaining member 13 is immovably restrained, the entire link assembly 53
4 is prevented, the extended state is maintained. Reference numeral 15a indicates the bolt 15
It is Natsu who is screwed together.

There is a space between the upper part of each main pillar 4a in the guide frame 4, that is, the top, and the workbench 52, when the workbench 52 reaches a position slightly above the guideframe 4, as shown in FIGS. 2 and 3. A stop member 16 is provided to selectively restrict its descent. Each stop member 16 in the illustrated example
is horizontally rotatably displaceable on the main pillar 4a of the guide frame 4, and when not in use, its tip is directed outward as shown in FIG. When stopping the workbench 52 above the guide frame 4, please refer to Figures 2 and 3.
As shown in the figure, the tip of the stop member 16 is directed inward to support the workbench 52 from below.

Reference numerals 17 and 18 denote locking members provided at the bottom of the front and rear centers of the workbench 52, respectively, so that when the workbench 52 is pushed up further from the guide frame 4, the movable It automatically engages with the auxiliary ladder 11a and the support 4b and pulls them up. Then, the auxiliary ladder 11a was pulled up.
The support column 4b prevents the workbench 52 from swinging back and forth and left and right. The auxiliary ladder 11a is slidably assembled to the fixed ladder 11, and the support column 4b is slidably housed within the main column 4a of the guide frame 4 made of pipe material. .

In the figure, reference numerals 19, 20, and 21 are bolts for fixedly stopping the main platform 51, the auxiliary ladder 11a, and the support 4b at respective predetermined positions.

[Effect]

The operation of the lifting device of this invention having the above-mentioned structure will be explained below.

FIG. 1 shows the state before use. The lifting frame 5 is in the lower position, and the link assembly 53 is also in the retracted state. Here, when the hoisting machine 6 is operated to wind the cable 8 into the winding drum, the elevating frame 5 is moved as shown in FIG.
The link assembly 53 is pulled up to the upper position of the guide frame 4 while being folded. Therefore, in order to stop the workbench 52 located at a position slightly above the guide frame 4 at that position, the stop member 16 is rotated inward by hand to support the workbench 52 from below.

Next, when the hoisting machine 6 is rotated in the opposite direction and the cable 8 is let out from its hoisting drum, only the main platform 51 of the elevating frame 5 is lowered to its original lower position, as shown in FIG. return. During this time, the link assembly 53 is in an extended state, and the holding member 13 is locked in order to maintain this state. Furthermore, when the cable 8 is reeled in by the hoisting machine 6, the elevating main platform 51 moves toward the guide frame 4 while holding the link assembly 53 in the extended state.
Since it is raised to the upper position, the work platform 52 connected above the link assembly 53 can reach the uppermost position. At this time, the auxiliary ladder 11a and the supports 4b of the guide frame 4 are also placed on the workbench 52.
It is pulled up by locking members 17 and 18 fixed to. In order to continue working in this position, the bolts 19, 20, and 21 are tightened to fixedly position the main platform 51, the auxiliary ladder 11a, and the support column 4b. Note that the workbench 52 can be stopped at any position between the lower position and the uppermost position. Therefore, it is possible to work at a position between these positions and to pull up or lower materials to the position.

In this apparatus, in order to return the elevator frame 5 to the initial position shown in FIG. 1, the procedure described above may be reversed.

[Effect of idea]

According to the above-described elevating work device of this invention, although the structure is relatively simple, the work platform 52 can reach a position exceeding the height of the guide frame 4, so that it can be used at the construction site. This has the effect that work at high positions such as work and lifting and unloading of various materials from high positions can be carried out advantageously and efficiently.

[Brief explanation of the drawing]

Figure 1 is a side view of the lifting device of this invention, Figures 2 to 4 are side views of the same, showing the steps to set the workbench to the highest position, and Figure 5 is the link assembly of this invention. FIG. 6 is an enlarged partial vertical side view showing a holding member for holding the holding member in an extended state, and FIG. 6 is an enlarged front view thereof. 1... Base, 4... Guide frame, 5... Lifting frame, 5
DESCRIPTION OF SYMBOLS 1... Lifting main platform, 52... Workbench, 53... Link assembly, 53a... Link, 6... Hoisting machine, 8
... Cable, 13 ... Holding member, 16 ... Stopping member.

Claims (1)

[Scope of utility model registration request] A base 1, a guide frame 4 erected on the base 1, an elevating frame 5 that can move up and down guided by the guide frame 4, a hoist 6 provided on the base 1, and the hoist. In an elevating work device consisting of a cable 8 that is unwound from a winding drum 6 and whose tip is attached to the elevating frame 5,
The elevating frame 5 is composed of an elevating main platform 51 located below and a workbench 52 located above.
1 and the workbench 52 are connected by an expandable link assembly 53 consisting of a plurality of links 53a, and the link assembly 53 is provided with a holding member 13 to maintain its extended state, and A lifting and lowering work device characterized in that a stop member 16 is provided between the work table 52 and the work table 52 to selectively restrict the descent of the work table 52.