Lift for construction

Abstract

A lift for construction, according to the present invention, comprises: a mast in which unit masts, structured to have a plurality of frames combined together, are coupled in the vertical direction; a carriage having a guide rail mounted on one side surface thereof so as to be capable of ascending or descending along the mast, and having a boarding space therein; a driving unit mounted on the carriage so as to drive the carriage to move along the mast; and a control device mounted at the upper part of the carriage so as to control the operation of the driving unit, wherein the control device detects the end of the mast so as to cut off the power of the driving unit if the control device rises higher than the end of the mast.

Description

Construction lifts

[0001] The present invention relates to a construction lift, and more particularly, to a construction lift capable of preventing a fall of the lift by preventing the lift from rising any further when the height of the lift rises above a certain standard value.

[0002] In general, a construction lift is a machine that transports cargo or workers in high-rise buildings, mines, factories, etc. It is constructed by stacking an assembled mast higher than the expected height of the building to be constructed, installing a transport structure there, and then using various hoisting devices to raise or lower the transport structure, thereby transporting construction materials or workers to each floor of the building.

[0003] These construction lifts are additionally configured with a cable for supplying power to a driving device for driving the transporter upward and downward, a distribution panel for controlling the operation of each part with the supplied power, and a detection means for detecting the position of the transporter ascending and descending along a mast and guiding the transporter to the calling floor.

[0004] Construction lifts are stacked vertically to match the building's height, and the lift moves up and down along the mast. The masts are assembled one by one, gradually increasing in height until the desired height is reached.

[0005] When assembling a mast, a worker climbs onto the top of the transporter and assembles the masts one by one, and as the mast rises, the transporter also rises.

[0006] If a machine malfunction causes the transporter to fall beyond the top of the mast, the transporter will fall. Accidents involving worker deaths due to transporter falls continue to occur.

[0007] The present invention aims to provide a construction lift capable of preventing a transport vehicle from falling.

[0008] In addition, the present invention seeks to provide a construction lift that can perform mast assembly work more safely and easily.

[0009] A construction lift according to the present invention comprises: a mast in which a plurality of unit masts having a frame combination structure are vertically connected; a carrier having a guide rail mounted on one side thereof so as to be able to rise or fall along the mast and having a passenger space inside; a driving unit mounted on the carrier to drive the carrier to move along the mast; and a control device mounted on the upper portion of the carrier to control the operation of the driving unit, wherein the control device is characterized in that it detects the end of the mast and cuts off power to the driving unit when the control device rises higher than the end of the mast.

[0010] In an embodiment of the present invention, the construction lift further includes a foothold unit fastened to the vertical frame of the mast at the upper portion of the transport structure, and the control device can be fastened to the foothold unit.

[0011] In an embodiment of the present invention, the footrest unit may include a pair of vertical supports that are horizontally connected to the vertical frame of the mast on the guide rail and include a fastening ring portion of the vertical frame; a horizontal support that connects the pair of vertical supports; a footrest portion that is fastened to the upper end of the vertical support and protrudes in the direction of the transporter; and a load support portion that is connected to the footrest portion and the vertical support to support the load of the footrest.

[0012] In an embodiment of the present invention, the horizontal support includes a lower horizontal support coupled to the lower portion of the vertical support and an upper horizontal support coupled to the upper portion, and the control device can be fastened to the upper horizontal support.

[0013] In an embodiment of the present invention, the control device includes a limit switch mounted to contact the mast, and the limit switch is turned on when the carrier is raised and the contact with the mast is lost, thereby cutting off power supplied to the driving unit.

[0014] In an embodiment of the present invention, the limit switch may include a main body mounted on the transporter and having a contact point therein; a switching unit rotatably coupled to the main body within a predetermined range and turning the contact point on or off according to rotation; an arm coupled to the switching unit and extending in the direction of the mast; and a roller coupled to an end of the arm and rotating along a contact surface of the mast when the transporter moves by contacting the mast.

[0015] In an embodiment of the present invention, the control device includes a proximity sensor that detects a mast, and can cut off power to the driving unit if the proximity sensor does not detect the mast.

[0016]

[0017] According to the present invention, the carrier can be prevented from rising higher than the mast, thereby preventing the carrier from falling.

[0018] In addition, according to the present invention, the footrest unit is attached to the upper part of the carrier, so that the assembly work of the mast can be easily performed.

[0019]

[0020] FIG. 1 shows a side view and a front view of a construction lift according to an embodiment of the present invention.

[0021] Figure 2 shows the configuration of the main parts of a construction lift according to an embodiment of the present invention.

[0022] Figure 3 shows the footrest unit of Figure 2 in a disassembled form.

[0023] Figure 4 shows the control device of Figure 2 in isolation.

[0024] Figure 5 shows a state in which the control device of a construction lift according to an embodiment of the present invention is turned off.

[0025] Figure 6 shows the control device of a construction lift according to an embodiment of the present invention in an on state.

[0026] Hereinafter, the present invention will be described in detail with reference to examples and drawings. These examples are provided solely as examples to more specifically illustrate the present invention, and it will be apparent to those skilled in the art that the scope of the present invention is not limited by these examples.

[0027] Additionally, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and in case of conflict, the description in this specification, including definitions, shall prevail.

[0028] To clearly explain the invention proposed in the drawings, irrelevant parts have been omitted, and similar parts have been designated with similar drawing reference numerals throughout the specification. Furthermore, when a part is said to "include" a component, this does not mean that other components are excluded, but rather that other components may be included, unless otherwise specifically stated. Furthermore, the term "part" described in the specification refers to a single unit or block that performs a specific function.

[0029] The identifiers (1, 2, etc.) for each step are used for convenience of explanation and do not describe the order of each step. Each step may be performed in a different order than stated unless the context clearly indicates a specific order. In other words, each step may be performed in the same order as stated, may be performed substantially simultaneously, or may be performed in the opposite order.

[0030]

[0031] Hereinafter, implementation examples and embodiments of the present invention will be described in detail with reference to the attached drawings. However, the present invention may not be limited to these implementation examples and embodiments and drawings.

[0032] FIG. 1 illustrates a construction lift according to an embodiment of the present invention, wherein (a) of FIG. 1 illustrates a side view, (b) of FIG. 1 illustrates a front view, FIG. 2 illustrates a configuration of a main part of a construction lift according to an embodiment of the present invention, and FIG. 3 illustrates a foothold unit of FIG. 2 in isolation, wherein (a) of FIG. 3 illustrates a perspective view, (b) of FIG. 3 illustrates a front view, and FIG. 4 illustrates a control device in isolation, wherein (a) of FIG. 4 illustrates an appearance, and (b) briefly illustrates a durable configuration.

[0033] Referring to the attached drawings, a construction lift according to an embodiment of the present invention includes a mast (100) in which a plurality of unit masts having a frame combination structure are vertically connected; a carrier (200) having a guide rail (210) mounted on one side thereof so as to be able to rise or fall along the mast and having a boarding space inside; a driving unit (300) mounted on the carrier to drive the carrier to move along the mast; and a control device (400) located on the upper portion of the carrier to control the operation of the driving unit, wherein the control device can detect the end of the mast and cut off power to the driving unit when the control device rises higher than the end of the mast.

[0034] The above mast (100) can be assembled into unit masts to match the height of the building and can be composed of a number of vertical frames (120) and horizontal frames (130). A rack gear (110) is installed on the mast and can rotate by meshing with the gear of the driving unit (300) to allow the transporter to move up and down.

[0035] The above transporter (200) is for transporting materials required for a construction site, and has a predetermined space provided inside, and a driving unit (300) for driving the transporter (200) can be installed.

[0036] A crane (10) is mounted on the upper part of the transporter (200) to lift the mast unit by unit when assembling the mast. A guide rail (210) is mounted on the side of the transporter (200), and a roller is mounted on the guide rail (210) so that the transporter (200) can be easily moved along the mast.

[0037] When assembling a mast, a worker climbs on top of the transporter to work, so a safety railing (600) is installed on top of the transporter to prevent the worker from falling.

[0038] A safety railing (600) is installed around the upper edge of the transport vehicle, but is not installed in the area where the mast (100) is installed. This is because the safety railing may interfere with the mast assembly work.

[0039] A step unit (500) is formed on the upper part of the above-mentioned transport device (200), so that a worker can perform mast assembly work by standing on the step unit (500). In the past, since there was no step unit, the transport device had to be raised as high as possible to fasten the bolts on the upper part of the mast during mast assembly work. In this case, there are cases where the transport device falls off the mast due to a mechanical malfunction. Otherwise, the worker has to climb on the railing to perform the work, which also carries the risk of the worker falling.

[0040] In the present invention, by adding a foothold unit (500), it is possible to help prevent falls of workers and carriers, as well as increase work efficiency.

[0041] The above foothold unit (500) can be fastened to the vertical frame (120) of the mast.

[0042] The above-mentioned foothold unit (500) may include a pair of vertical supports (510) that are horizontally connected to the vertical frame of the mast on the guide rail (210) and include a fastening ring portion (512) of the vertical frame, a horizontal support (520) that connects the pair of vertical supports, a foothold portion (530) that is fastened to the upper end of the vertical support and protrudes in the direction of the transporter, and a load support portion (540) that is connected to the foothold portion and the vertical support and supports the load of the foothold.

[0043] When the load support member (540) is formed at an angle, a folding member (542) can be formed in the center. Accordingly, when the footrest member (530) is unnecessary during work, the footrest member (530) can be folded. By folding the footrest member, maintenance and repair of the construction lift can be facilitated.

[0044] The above horizontal support (520) may include a lower horizontal support coupled to the lower portion of the vertical support and an upper horizontal support coupled to the upper portion.

[0045] It is preferable that the above control device (400) be fastened to the upper horizontal support.

[0046] A cover that protects the control device can be attached to the upper horizontal support (520) above the control device. The cover (520) can protect the control device from rainwater or foreign substances.

[0047] A fixing plate (514) having a screw hole formed therein can be attached to the lower portion of the vertical support (510) of the foot unit. The fixing plate (514) is attached in the direction of the transport port opposite to the ring portion (512). The upper edge of the transport port (200) is formed with a rib (211) that protrudes to a predetermined height, and the foot unit can be firmly fixed by screwing the fixing plate (514) and the rib (211). The fixing plate (514) can be composed of a first fixing plate (514-1) that extends downward in parallel with the vertical support (510) and a second fixing plate (514-2) that protrudes vertically in the direction of the transport port. The first fixing plate (514-2) can prevent the first fixing plate (514-1) from bending when fastened with a bolt.

[0048] The above control device (400) may include a limit switch mounted to contact the mast. The limit switch may be turned on when the carrier is lifted and the mast is no longer in contact with the limit switch, thereby cutting off power to the driving unit. The limit switch may be placed in contact with any part of the mast, such as the vertical frame or rack gear. In the embodiment of the present invention, the limit switch is shown as being placed in contact with the rack gear of the mast as an example.

[0049] In addition to the limit switch, the control device (400) may include various devices capable of detecting the height of the mast. For example, the control device (400) may include a proximity sensor, and if the proximity sensor does not detect the mast, the control device may determine that the mast has risen higher than the mast and cut off power to the driving unit.

[0050] The above limit switch may include a main body (410) mounted on the transporter and having a contact point (424) therein, a switching unit (420) rotatably coupled to the main body within a predetermined range and turning the contact point on or off according to rotation, an arm (430) coupled to the switching unit and extending in the direction of the rack gear, and a roller (440) coupled to the end of the arm and rotating along a contact surface of the rack gear when the transporter moves by contacting the rack gear.

[0051] The above switching unit (420) may include a rotation shaft (421) mounted on the main body, a torsion spring (422) coupled to the rotation shaft and providing tension to allow the arm to move downward when the roller is separated from the rack gear, and a pressing unit (423) formed integrally with the arm in the opposite direction to the arm with the rotation shaft as the center and pressurizing the contact point according to the movement of the arm.

[0052] Therefore, when the roller is lifted from the mast and the arm is lowered by the tension of the torsion string, the pressure part rises and pressurizes the contact, thereby turning the contact on.

[0053] When the contact is turned on, the power supplied to the PCB board of the drive unit is cut off, which stops the drive unit from operating and stops the carrier from rising.

[0054] Fig. 5 shows a state in which the limit switch is in contact with the rack gear (110) of the mast and is operating normally, and Fig. 6 shows a state in which the limit switch is turned on by being raised higher than the end of the rack gear (110) of the mast.

[0055] If the carrier rises higher than the mast, there is a risk of the carrier falling because there is no object to support the carrier. However, if a control device is attached to the top of the carrier and the control device is raised higher than the mast, the carrier can be prevented from falling by cutting off the power to the carrier so that it cannot rise any further.

[0056]

[0057] Although this specification describes only a few examples among various embodiments performed by the inventors of the present invention, the technical idea of ​​the present invention is not limited or restricted thereto, and can be modified and implemented in various ways by those skilled in the art.

Claims

1. A mast in which a plurality of unit masts with a frame combination structure are connected vertically; A carrier equipped with a guide rail on one side to allow it to rise or lower along the mast and having a boarding space inside; A driving unit mounted on the above-mentioned transporter to drive the transporter to move along the mast; and It includes a control device mounted on the upper part of the above-mentioned transporter to control the operation of the driving unit, The above control device detects the end of the mast and cuts off power to the driving unit when the control device rises higher than the end of the mast. Further comprising a footing unit attached to the vertical frame of the mast at the upper part of the above transport means, A construction lift characterized in that the above control device is connected to a footrest unit.

2. (deleted) 3. In paragraph 1, The above footing unit is, A pair of vertical supports horizontally connected to the vertical frame of the mast on the above guide rail and including a fastening ring portion of the vertical frame; A horizontal support connecting the above pair of vertical supports; A footrest portion attached to the upper part of the vertical support and protruding in the direction of the transporter; A construction lift characterized by including a load support member connected to the footing member and a vertical support member to support the load of the footing member.

4. In paragraph 3, The above horizontal support is, It includes a lower horizontal support that is connected to the lower part of the vertical support and an upper horizontal support that is connected to the upper part, A construction lift characterized in that the above control device is attached to the upper horizontal support.

5. In paragraph 1, The above control device comprises a limit switch mounted to contact the mast, A construction lift characterized in that the above limit switch is turned on when the transporter is raised and the contact with the mast is lost, thereby cutting off the power supplied to the driving unit.

6. In the fifth paragraph, the limit switch, A main body mounted on the above-mentioned transport device and having a contact point inside; A switching unit that is rotatably coupled to the main body within a predetermined range and turns the contact on or off according to the rotation; An arm coupled to the switching unit and extending in the direction of the mast; and A construction lift characterized by comprising a roller coupled to the end of the arm and in contact with the mast to rotate along the contact surface of the mast when the transporter moves.

7. In paragraph 1, The above control device includes a proximity sensor for detecting the mast, A construction lift characterized in that the control device cuts off power to the driving unit when the proximity sensor does not detect the mast.

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