CN206987338U - Height-adjustable scaffold - Google Patents

Abstract

The utility model is a height-adjustable scaffold, which effectively solves the problems of current scaffolds that cannot be adjusted in height or the speed of height adjustment is slow, the range of height adjustment is small, and time-consuming and labor-intensive; the technical solution includes a rectangular plate-shaped base, A lower bracket is respectively fixed at the four corners of the base, and a slidable upper bracket is set on the upper end of each lower bracket, and a connecting rod is hinged on the outer wall of each upper bracket; A chute located on the upper surface of the base is opened along the line connecting the center of the bottom surface. Each chute is embedded with two sliders that can slide in it. The two sliders on the same side in the left and right directions in the two chute The rods are fixedly connected to form a double slider. A cam is installed in the center of the upper surface of the base. Two sets of double sliders are located on both sides of the cam and the cross bar is in contact with the cam. The other end of each connecting rod is connected to the nearest slider. Block hinged. The utility model has the advantages of convenient, fast and accurate height adjustment and a large adjustment range.

Description

adjustable height scaffolding

technical field

The utility model relates to the field of construction equipment, in particular to a height-adjustable scaffold.

Background technique

Mobile scaffolding refers to the various supports set up on the construction site for workers to operate and solve vertical and horizontal transportation. It is mostly used on the construction site for exterior walls, interior decoration or places where direct construction is not possible due to high floor height. It is mainly used for construction personnel to work up and down or for peripheral safety net maintenance and high-altitude installation components, etc. It has the characteristics of simple assembly and disassembly, good load-bearing performance, safe and reliable use, etc., and its development speed is very fast. Among all kinds of new scaffolding, mobile scaffolding is the earliest to be developed and used the most. As a basic construction facility, mobile scaffolding is widely used in various large and small construction sites and plays a great auxiliary role. Mobile scaffolding was first successfully developed by the United States. By the early 1960s, countries such as Europe and Japan had successively applied and developed such scaffolding. Since the late 1970s, my country has introduced and used this kind of scaffolding from Japan, the United States, the United Kingdom and other countries.

At present, most of the mobile scaffolds used are of fixed height. For construction projects with frequent changes in working height, this kind of scaffold is extremely inconvenient to use; some scaffolds are divided into multiple layers, and the height of each layer is different. The adjustment is not flexible enough, and it often happens that the height of the upper and lower floors cannot match the required height; very few scaffolds have the function of continuous height adjustment, but they all use screw mechanisms to adjust the height, which is slow and laborious, and the height adjustment range is general very small.

Therefore, it is an urgent problem to be solved to design a fast and convenient scaffolding with a large height adjustment range and a continuously adjustable scaffold.

Utility model content

In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an adjustable height scaffold, which effectively solves the problems of the existing scaffolds that cannot be adjusted in height or the speed of height adjustment is slow, the range of height adjustment is small, and the problems of time-consuming and labor-intensive .

The technical solution is to include a rectangular plate-shaped base, a vertical lower bracket is respectively fixed on the four corners of the upper surface of the base, the four lower brackets are placed symmetrically, and an upper bracket is set on the upper end of each lower bracket, and the upper bracket can be placed on the lower bracket. The bracket slides up and down, and each upper bracket is hinged with a connecting rod on the inner outer wall along the left-right direction;

The lower brackets are divided into two groups, the front and the rear. The two lower brackets of each group are provided with a chute located on the upper surface of the base along the center line of the bottom surface of each group, and each chute is embedded with two sliders that can slide therein. , the two sliders in the same chute are arranged left and right, and the two sliders on the same side in the left and right directions in the two chutes are fixedly connected by a cross bar to form a double slider. Rotating cam, two sets of double sliders are located on the left and right sides of the cam and the cross bar is in contact with both sides of the cam. The other end of each connecting rod is hinged with the nearest slider to form a cam that rotates to drive the double sliders. Sliding left and right, the left and right sliding of the double slider drives the lower ends of the four connecting rods to move left and right synchronously, so that the four upper brackets move up and down synchronously on the lower brackets.

The utility model can be adjusted in the working process without disassembly and reinstallation, the height adjustment speed is fast, the adjustable range is large, and it can be adjusted to any height within the maximum height adjustment range. The new type has obvious advantages.

Description of drawings

Fig. 1 is a front view of the utility model.

Fig. 2 is a perspective view of the utility model.

Fig. 3 is a schematic diagram of the lowest position of the utility model.

Fig. 4 is a schematic diagram of the highest position of the utility model.

detailed description

The specific implementation of the present utility model will be described in further detail below in conjunction with the accompanying drawings.

The utility model provided by Fig. 1 to Fig. 4 includes a rectangular plate-shaped base 1, a vertical lower bracket 3 is respectively fixed on the four corners of the upper surface of the base 1, and the four lower brackets 3 are placed symmetrically, and the upper end of each lower bracket 3 is covered There is an upper bracket 4, the upper bracket 4 can slide up and down on the lower bracket 3, and each upper bracket 4 is hinged with a connecting rod 5 on the outer wall of the inner side along the left and right direction;

Described lower bracket 4 is divided into front and rear two groups, and two lower brackets 4 of each group are provided with the chute 6 that is positioned at the upper surface of base 1 along the center line of its bottom surface, and each chute 6 is embedded with two The slider 7 that slides inside, the two sliders 7 in the same chute 6 are arranged left and right, and the two sliders 7 on the same side in the left and right directions in the two chute 6 are fixedly connected by a cross bar 8 to form a double slider. The center of the upper surface of the base 1 is equipped with a cam 9 that can rotate in the horizontal plane. Two groups of double slide blocks are positioned at the left and right sides of the cam 9 and the cross bar 8 contacts both sides of the cam 9. The other end of each connecting rod 5 is It is hinged with the nearest slider 7 to form the rotation of the cam 9 to drive the double slider to slide left and right, and the left and right slide of the double slider drives the lower ends of the four connecting rods 5 to move left and right synchronously, so that the four upper brackets 4 are on the lower bracket 3 A structure that moves up and down synchronously.

There are horizontal beams 12 connected between the upper brackets 4 on the same side, and a workbench 13 is built on the horizontal beams 12 .

In order to facilitate the movement of the scaffold, four universal wheels 2 are provided on the lower surface of the base 1, and a holding device is installed on the universal wheels 2, so that the scaffold cannot be moved arbitrarily during work.

A stepper motor 10 is installed above the cam 9, the motor shaft of the stepper motor 10 is fixedly connected to the center of the cam 9, and the stepper motor 10 is used as the driving device of the cam 9, which can accurately control the angular displacement, thereby precisely controlling the height adjustment. quantity.

The main shaft of the stepping motor 10 is provided with a braking device 11, the braking device 11 can fix the angular displacement of the cam 9, and can also limit the descending speed of the upper bracket 4 when it is adjusted downwards, so as to prevent the upper bracket 4 from falling suddenly. .

The upper bracket 4 is respectively provided with locking screws to prevent the upper bracket 4 from falling accidentally during use.

In order to ensure that the four upper brackets 4 are adjusted synchronously and steadily, the cam 9 is elliptical.

When the utility model is in use, at first unclamp the holding device on the universal wheel 2, push the scaffold to the designated position, and lock the holding device on the universal wheel 2, so that the scaffold can not move arbitrarily. Loosen the locking screw on the upper bracket 4, loosen the brake device 11, input a corresponding number of pulse signals to the stepper motor 10 according to the required angular displacement, and the stepper motor 10 rotates the corresponding angular displacement, thereby driving the cam 9 to rotate corresponding angular displacement. When the minor axis of the cam 9 is set to be parallel to the chute 6, it is the initial position. At this time, the angular displacement is 0, and the working angular displacement of the cam 9 is greater than or equal to 0 degrees and less than or equal to 90 degrees; within this angular displacement range, the stepping motor 10 Turn clockwise to drive the cam 9 to rotate clockwise. The cam 9 pushes the lower end of the connecting rod 5 to move to both sides through the double slider, so that the upper end of the connecting rod 5 drives the upper bracket 4 to move upward along the lower bracket 3 to realize the upward adjustment of the scaffold. The stepping motor 10 rotates counterclockwise, which drives the cam 9 to rotate counterclockwise, and the left and right vertical distance between the two contact points of the cam 9 and the cross bars 8 on both sides decreases. The lower end of the connecting rod 5 moves to the middle, and the upper end moves downward to realize the downward adjustment of the scaffold; after adjusting the height, tighten the locking screw on the upper bracket 4 to prevent the upper bracket 4 from sliding. After the scaffold is used, loosen the locking screw on the upper bracket 4, adjust the scaffold to the lowest position, loosen the holding device on the universal wheel 2, push the scaffold to the storage place, lock the holding device, and wait for the next step. times used.

Compared with the layered height-adjusting scaffold, the utility model has the remarkable advantage that the height can be adjusted during the operation. When the layered scaffolding needs to be raised to another height after completing the operation at one height, the staff needs to leave the scaffolding, and then clean up the materials on the scaffolding workbench, then remove the scaffolding workbench, and then put the workbench To build to another height, this process requires workers to go up and down, empty the materials, and dismantle the workbench, which is cumbersome to operate. And the utility model does not need the staff to leave the scaffolding when adjusting the height, and does not need to empty the materials on the workbench 13, and only needs to control the stepper motor 10 to realize the height adjustment, which is convenient and quick, time-saving and labor-saving.

Compared with the screw rod height adjustment scaffold, the utility model has the advantages of fast height adjustment speed, large adjustment range and stable adjustment process. The screw height adjustment scaffold realizes the height adjustment through the relative rotation of the threaded screw, and is limited by the pitch of the thread, and its height adjustment speed is very slow, and manual adjustment is required. However, the utility model adopts the combination of cam and connecting rod for height adjustment. Compared with the low-efficiency transmission mode of the screw rod, the utility model stepper motor 10 can rotate at a very small angle to make the upper bracket 4 have a large vertical direction. Displacement, fast adjustment speed, large adjustment range, and the rotation of the stepper motor 10 drives the four upper brackets 4 linkage, and simultaneously adjusts the height to ensure that the workbench is always at the level, and the height adjustment process is stable.

The utility model can adjust the upper bracket 4 to any height in the adjustment stroke by controlling the angular displacement of the stepping motor 10, which is flexible and accurate.

In addition, the utility model adopts the chute and slide rail structure and the hinged joint mode, so the stability is good. At the same time, the connecting rod 5 can not only serve as the transmission part, but also play the role of triangular support, so that the scaffold structure is more stable.

In summary, compared with the existing mobile scaffolding, the utility model has the advantages of convenient adjustment, time-saving and labor-saving, large adjustment range, fast adjustment speed, stable adjustment process, precise and controllable adjustment height, and stable structure.

Claims (7)

1. a kind of Height-adjustable scaffold, include the base of rectangular plate-like（1）, it is characterised in that base（1）Distinguish upper surface corner It is fixed with a vertical lower carriage（3）, four lower carriages（3）It is symmetrically placed, each lower carriage（3）Upper end is cased with a upper branch Frame（4）, upper bracket（4）Can be in lower carriage（3）On slide up and down, each upper bracket（4）Cut with scissors in left-right direction on the outer wall of inner side It is connected to a connecting rod（5）；

The lower carriage（4）It is divided into front and rear two groups, every group of two lower carriages（4）Offered along its bottom center's line the bottom of positioned at Seat（1）The chute of upper surface（6）, each chute（6）It is embedded with two sliding blocks that can be slided in it（7）, same chute（6）It is interior Two sliding blocks（7）Left and right arrangement, two chutes（6）Two sliding blocks of homonymy on interior left and right directions（7）Through cross bar（8）It is fixed to connect Connect, form duplex sliding block, base（1）Upper surface center the cam that can be rotated in the horizontal plane is installed（9）, two groups of duplexs cunnings Block is located at cam（9）The left and right sides and cross bar（8）With cam（9）Two side contacts, each connecting rod（5）The other end with from it Nearest sliding block（7）It is be hinged, form cam（9）Rotate and drive duplex sliding block to horizontally slip, duplex sliding block horizontally slips drive four Individual connecting rod（5）Lower end synchronously moves left and right, so that four upper brackets（4）In lower carriage（3）The upper structure synchronously moved up and down.

A kind of 2. Height-adjustable scaffold according to claim 1, it is characterised in that described homonymy upper bracket（4）Between It is connected with horizontal gird（12）, horizontal gird（12）On taken workbench（13）.

A kind of 3. Height-adjustable scaffold according to claim 1, it is characterised in that described base（1）Lower surface is provided with 4 Individual universal wheel（2）, described universal wheel（2）On cohesion device is installed.

A kind of 4. Height-adjustable scaffold according to claim 1, it is characterised in that described cam（9）Top is provided with Stepper motor（10）, stepper motor（10）Motor shaft and cam（9）Center be fixedly connected.

A kind of 5. Height-adjustable scaffold according to claim 4, it is characterised in that described stepper motor（10）Main shaft It is provided with brake apparatus（11）.

A kind of 6. Height-adjustable scaffold according to claim 1, it is characterised in that described upper bracket（4）It is upper to set respectively There is lock-screw.

A kind of 7. Height-adjustable scaffold according to claim 1, it is characterised in that described cam（9）For ellipticity.