JP5668985B2 - Lifting device and lifting method - Google Patents

Description

  The present invention relates to a lifting device and a lifting method.

Conventionally, in reinforced concrete buildings, mobile cranes are sometimes used in the construction work, but large mobile cranes are difficult to install on the premises, so a small crane is generally selected. Has been.
In such a small model, the material cannot be lifted over the entire building, and after the material is lifted to a predetermined floor, it is transported by moving horizontally to the place of use. In addition, when the material is a beam formwork, it is difficult to lift the whole with a mobile crane and attach it directly to a predetermined position. ing.

  On the other hand, as a lifting method not using a mobile crane, it is known that materials are lifted by a lifting device using a plurality of hydraulic cylinders. In such a lifting device, if the strokes of a plurality of cylinders are not synchronized, the frame receiving the material is tilted, and the load of the material is applied only to a specific cylinder through the frame. Resulting in. Therefore, synchronous control is performed in which the stroke of each cylinder is constantly measured and the stroke is adjusted when a stroke difference occurs (see, for example, Patent Document 1).

JP-A-5-339000

However, the conventional mechanism for synchronizing a cylinder by a lifting device such as Patent Document 1 has the following problems.
That is, some cylinders have a small allowable range of stroke differences between a plurality of cylinders, and it is necessary to frequently adjust the strokes. If this adjustment is not repeated, there is a problem that some cylinders do not expand and contract and stop.
In addition, a control device that synchronizes a plurality of cylinders is expensive, and there is a problem that the cost of the lifting device increases.

  The present invention has been made in view of the above-described problems, and is a lifting device that can smoothly operate the vertical expansion and contraction operation of the support column with a simple structure, and can reduce the cost of the device. And to provide a lifting method.

  In order to achieve the above object, the lifting device according to the present invention is a lifting device that supports and lifts an object to be lifted from below, and is disposed at opposing positions with a distance and can be vertically expanded and contracted. A pair of struts, a support frame that has a fulcrum that abuts the upper end of each strut, protrudes outward in the radial direction around the center axis of the strut, and extends downward, and is provided on one strut A load receiving frame for connecting a pair of lower end portions of the support frame and a pair of lower end portions of the support frame provided on the other support column, and the support frame and the load receiving frame are connected by pin joining. It is a feature.

  Further, the lifting method according to the present invention is a lifting method using the lifting device described above, in which a plurality of lifting devices are arranged at intervals in one direction, and each of the lifting frames has a long length. A predetermined position in the longitudinal direction of the scaled object to be lifted is supported from below and is lifted.

In the present invention, in a state in which the support column is contracted and lowered, the support object is lifted to a predetermined height by extending the support column after the support object is supported from below by the load receiving frame. Can do.
And since the load receiving frame constitutes a link mechanism that is rotatably connected to the support frame provided on the pair of columns by pin bonding, a stroke difference due to expansion and contraction occurs between the pair of columns. In this case, that is, even when the heights of the upper ends of the columns are different, the load receiving frame is inclined at an appropriate angle by the link mechanism, and the load of the column is not affected. Therefore, it can suppress that the load of the horizontal direction (direction which inclines a support | pillar) is applied with respect to a support | pillar, and the expansion-contraction operation | movement of a support | pillar becomes smooth.
Thus, the structure using a simple link mechanism can cope with the stroke difference between a pair of struts, so there is no need to use an expensive control device for controlling the synchronization of the expansion and contraction of the struts. The cost for the heavy equipment can be reduced.

  In addition, the present lifting apparatus can lift a long object to be lifted such as a beam-type frame without dividing it by using a plurality of units. In this case, the support frame provided with the load receiving frame has a fulcrum that contacts the upper end of the column and is provided in a balanced state. Even if this balance is offset, the support frame contacts the column. The support frame can be tilted around the fulcrum. Therefore, when a long object to be lifted is supported by a plurality of lifting devices, even if there is a stroke difference between the columns of these lifting devices, the support frame together with the load receiving frame that supports the lifting object Will be inclined. For this reason, the load is not applied to each column, and it is possible to suppress the load in the lateral direction (the direction in which the column is tilted) from being applied to the column, and the column can be smoothly expanded and contracted.

  As described above, since the load on the support can be reduced regardless of the weight of the lifted object, it is possible to cope with a heavy and large lifted object. Miniaturization can be achieved and use in a narrow space is also possible. Therefore, for example, in the construction of medium-sized buildings, conventionally, conventional formwork was used. However, for example, a large-scale unitized low-cost system formwork can be applied. The construction method can be adopted. In addition, the downsizing of the lifting device enables the device to be moved manually, so that a lifting machine such as a crane is not required to move the device.

  Moreover, in the lifting apparatus which concerns on this invention, it is preferable that the moving means which can move along a floor surface is provided in the lower end of a pair of support | pillar.

  In the present invention, it is possible to horizontally move the lifting device along the floor surface in a state where the column is extended and the object to be lifted is lifted to a predetermined height.

  Further, in the lifting apparatus according to the present invention, it is more preferable that a pin member for gently fitting the upper end of the support column and the support frame in the vertical direction is provided.

  In this case, even when the support frame is tilted with respect to the support column, since the upper end of the support column and the support frame are supported by the pin member, the support frame can be prevented from falling off from the upper end of the support column. Since the pin member is in a state of being gently inserted into the support column and the support frame, the support frame can be tilted within the range of movement of the pin member.

  Moreover, in the lifting apparatus which concerns on this invention, it is preferable that a support | pillar is expanded-contracted to an up-down direction with a hydraulic cylinder.

  In the present invention, since a hydraulic cylinder is used, the operation is simpler and the weight is lighter than that of a hydraulic cylinder, so that the handling becomes easy and the working efficiency can be improved. In addition, it is possible to eliminate the problem of soiling the place of use due to oil leakage or the like, as with a hydraulic cylinder.

  According to the lifting device and the lifting method of the present invention, the support frame has a simple structure in which the fulcrum of the support frame is merely brought into contact with the upper end of the support column, and the support frame and the load receiving frame are pin-joined. The vertical expansion and contraction of the support can be smoothly operated. And since the tuning control of a support | pillar becomes unnecessary, the cost concerning an apparatus can be reduced.

It is a perspective view which shows the whole outline | summary of the lifting apparatus by embodiment of this invention. It is an AA arrow directional view shown in FIG. 1, Comprising: It is a side view of a lifting apparatus. It is a BB arrow directional view shown in FIG. 1, Comprising: It is a side view of a lifting apparatus. FIG. 3 is a view taken along line CC in FIG. 2. It is a perspective view which shows the support structure of the upper end of a support | pillar. FIG. 6 is a partially cutaway side view of the support structure shown in FIG. 5, (a) is a view showing a neutral state of the support frame, and (b) is a view showing an inclined state of the support frame. It is a side view which shows the rocking | fluctuation state of a support frame, Comprising: It is a figure corresponding to FIG. It is a side view which shows the rocking | fluctuation state of a support frame, Comprising: It is a figure corresponding to FIG. (A)-(c) is a figure which shows the lifting procedure by a lifting apparatus. (A), (b) is a figure which shows the lifting procedure by the lifting apparatus following FIG.9 (c). FIG. 9 is a side view when a stroke difference is generated between the columns, and corresponds to FIG. 8. It is a side view at the time of a stroke difference having arisen between the support | pillars of two lifting apparatuses.

  Hereinafter, a lifting device and a lifting method according to embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the lifting device 1 (1A, 1B) according to the present embodiment is a device for supporting and lifting a lifted object from below, for example, an RC structure (reinforced concrete structure) building. In this construction, the long beam form 2 (lifted object) is used when being built at a predetermined position.

  As shown in FIGS. 2 to 4, specifically, the lifting device 1 is disposed at opposed positions at intervals, and a pair of support columns 10 (10 </ b> A, 10 </ b> B) that can expand and contract in the vertical direction, and an upper end 10 a of each support column 10. And has a fulcrum P (see FIGS. 1 and 6) that abuts against the center of the support 10A and 10B, and protrudes outward in the radial direction with the center axis (the support shaft O shown in FIGS. 5 and 6) as the center. , A support frame 20 extending downward, a pair of lower end portions 20a of the support frame 20A provided on one support column 10A, and a pair of lower end portions 20a of the support frame 20B provided on the other support column 10B. And a frame 30.

As shown in FIG. 1, the columns 10 </ b> A and 10 </ b> B are composed of a plurality of hydraulic cylinders and can be expanded and contracted in the vertical direction. A water tank 3 and a pump 4 are provided in the vicinity of the columns 10A and 10B, and the cylinder is extended by pumping water into the hydraulic cylinder.
The support pillars 10A and 10B have their lower ends 10b and 10b connected to each other by a connecting frame 11, and a plurality of projecting portions 12 project from the lower ends 10b of the support pillars 10A and 10B toward the outside in the horizontal direction. The connecting frame 11 and the overhanging portion 12 are provided with wheels 13 (moving means) that can move along the floor surface G.

  As shown in FIGS. 5 and 6, the flat support 14 is fixed to the upper end 10 a of the support column 10 with its plate surface oriented in a direction (substantially horizontal direction) perpendicular to the support shaft O. ing. The support base 14 has a square shape in a plan view, the center of the lower surface is fixed to the upper end 10a of the support column 10, and the upper surface 14a is in the range of the fulcrum P with which the support frame 20 abuts. And the through-hole 14b penetrated in the thickness direction at the four corners of the support base 14 is formed.

  As shown in FIGS. 2 to 4, the support frame 20 is formed by forming a square steel pipe into a U shape with an opening facing downward, a horizontal member 21 supported from below by a support base 14, and It consists of vertical members 22, 22 extending downward from both ends of the horizontal member 21 in the axial direction. The vertical members 22 and 22 are arranged at intervals from the support column 10.

As shown in FIGS. 5 and 6, the horizontal member 21 is provided with a protrusion 23 that protrudes downward at the center in the material axis direction Y. The support frame 20 is placed on the support base 14 by the protrusion 23 abutting on the support base 14 provided on the upper end 10 a of the support column 10, and the support frame 20 is supported by the upper end 10 a of the support column 10. In addition to being arranged in a balanced state, as shown in FIG. 7, it is configured to swing around the protrusion 23 as a fulcrum P as a so-called “frozen”.
Here, the state shown in FIG. 2, that is, the state in which the horizontal member 21 of the support frame 20 is horizontal is referred to as a neutral position, and the state of swinging and tilting as shown in FIGS. 5 and 6 is referred to as an inclined position.

  Further, the horizontal member 21 is provided with an overhang member 24 that protrudes from two locations of the horizontal member 21 toward the outside in the horizontal direction perpendicular to the material axis direction Y. In FIG. 5, a part of the overhanging material 24 is omitted for easy viewing. The overhanging material 24 is disposed so that each overhanging tip portion overlaps above one through hole 14b of the support base 14, and the overhanging tip portion is provided with a through hole 24a penetrating in the vertical direction. The through hole 24a on the support frame 20 side and the through hole 14b on the support column 10 side are provided coaxially in the vertical direction at the neutral position of the support frame 20, and through holes 14b located at the four corners of the support base 14, A drop prevention pin 6 (pin member) is gently inserted from above 24a. The drop-off prevention pin 6 is for preventing the support frame 20 from dropping off from the support base 14 even when the support frame 20 is tilted with respect to the support column 10.

As shown in FIG. 3, the support frames 20A and 20B provided on the pair of support columns 10A and 10B arranged at the facing positions are connected to each other by the load receiving frame 30 at the lower ends 20a and 20a facing each other. Yes. The load receiving frame 30 and the vertical member 22 of the support frame 20 are connected by pin joining. This connecting portion is hereinafter referred to as “connecting portion R”.
As a result, the support frames 20A and 20B that are pin-joined by the pair of load receiving frames 30 and 30 swing in the direction in which the pair of support pillars 10A and 10B face each other with the protrusion 23 as a fulcrum P as shown in FIG. It has a configuration.

Next, a lifting method using the lifting device 1 having the above-described configuration will be described with reference to the drawings.
As shown to Fig.9 (a), the lifting apparatuses 1A and 1B are installed in the state positioned to each of the both ends of the beam form frame 2 assembled previously. At this time, the beam form frame 2 is assembled in advance and placed on the low floor cart 7 so that a space is provided between the floor surface G and the beam form frame 2. The load receiving frames 30 of the lifting devices 1A and 1B are arranged so as to be positioned below the beam formwork 2.
In addition, the dashed-two dotted line shown to Fig.9 (a)-(c) and FIG.10 (b) has shown the wall surface for attaching the both ends of the beam formwork 2. FIG.

Next, as shown in FIG. 9B, the columns 10A and 10B of the pair of lifting devices 1A and 1B are operated to transfer the beam form 2 from the carriage 7 to the load receiving frame 30, and The load is borne by the pair of lifting devices 1A and 1B. In this state, the empty cart 7 is moved from below the beam formwork 2.
Thereafter, as shown in FIG. 9C, the columns 10A and 10B are extended to raise the beam form frame 2 to the height of the attachment position. When it is raised, each column 10A, 10B is raised while being synchronized so that the beam formwork 2 does not tilt.

Subsequently, as shown in FIG. 10A, the beam mold frame 2 is raised to a predetermined mounting height, and then horizontally moved to the mounting position of the beam mold frame 2. The horizontal movement of the beam form frame 2 is performed by the operator manually pushing the lifting device 1. Then, as shown in FIG. 10 (b), when the beam formwork 2 is moved to the attachment position, the beam formwork 2 is fixed to a predetermined location (here, the wall surface of the two-dot chain line), and the lifting device 1A, 1B is lowered, and the lifting work of the beam formwork 2 is completed.
Thus, since it becomes the work of lifting the beam formwork 2 grounded on the floor, there is no need to perform the work of assembling the beam formwork 2 on the work table as in the past, and the work efficiency is improved, There is an advantage that the work of assembling the beam formwork that has been performed on the work table becomes unnecessary.

Next, the effect | action of the lifting apparatus 1 mentioned above is demonstrated based on drawing.
In the present lifting apparatus 1, in a state where the support column 10 is contracted and lowered, the support frame 10 is extended after the beam receiving frame 30 is supported by the load receiving frame 30, thereby extending the support frame 10 to a predetermined height. Can be lifted to position.

8 and 11, the load receiving frame 30 constitutes a link mechanism that is rotatably connected to the support frames 20A and 20B provided on the pair of support columns 10A and 10B by pin joining. Therefore, even when a stroke difference Δt accompanying expansion / contraction occurs between the pair of support columns 10A and 10B, that is, when the heights of the upper ends of the support columns 10A and 10B are different, the load receiving frame 30 is provided by the link mechanism. The column 10 is inclined at an appropriate angle, so that a load is not applied to the column 10. Therefore, it can suppress that the load of the horizontal direction (direction which inclines the support | pillar 10) is applied with respect to the support | pillar 10, and the expansion-contraction operation | movement of the support | pillar 10 becomes smooth.
As described above, since a structure using a simple link mechanism can cope with the stroke difference Δt between the pair of columns 10A and 10B, an expensive control device for controlling the synchronization of the expansion and contraction of the column 10 is used. There is no need, and the cost of the lifting device can be reduced.

  Moreover, as shown in FIG.1 and FIG.12, this lifting apparatus 1 (1A, 1B) lifts the beam formwork 2 without dividing | segmenting it by using a plurality (two in a figure). be able to. In this case, the support frame 20 provided with the load receiving frame 30 has a fulcrum P that comes into contact with the upper end 10a (support base 14) of the support column 10, and is provided in a balanced state. Even in this case, the support frame 20 can be inclined with the fulcrum P in contact with the support column 10 as the center. Therefore, when the beam formwork 2 is supported by two lifting devices 1A and 1B, the beam formwork 2 is supported even if a stroke difference Δt occurs between the columns 10 of the lifting devices 1A and 1B. The support frame 20 is inclined together with the load receiving frame 30 to be performed. Therefore, the load of each column 10 is not burdened, and it is possible to suppress the load in the lateral direction (the direction in which the column 10 is tilted) from being applied to the column 10, and the column 10 can be smoothly expanded and contracted.

As described above, the load on the support column 10 can be reduced regardless of the weight of the beam formwork 2, so that it is possible to cope with a large and heavy object to be lifted, and a lifting device. Can be reduced in size, and can be used in a narrow space.
Therefore, for example, in the construction of medium-sized buildings, conventionally, conventional formwork was used. However, for example, a large-scale unitized low-cost system formwork can be applied. The construction method can be adopted. Moreover, since the lifting device 1 can be downsized, the device can be moved by human power, so that a lifting machine such as a crane is not required for moving the device.

  Further, as shown in FIG. 10 (a), since the wheels 13 that can move along the floor surface G are provided at the lower ends of the pair of columns 10A, 10B, the columns 10A, 10B are extended to form a beam. The lifting device 1 can be horizontally moved along the floor surface G while the mold 2 is lifted to a predetermined height.

  Further, as shown in FIGS. 5 and 6, even when the support frame 20 is inclined with respect to the column 10, the support base 14 and the overhanging material 24 of the support frame 20 are supported by the drop-off prevention pins 6. It is possible to prevent the support frame 20 from falling off the upper end 10a of the support column 10. Further, since the drop-off prevention pin 6 is gently inserted into the support column 10 and the support frame 20, the support frame 20 can be tilted within the range in which the drop-off prevention pin 6 moves.

  In addition, since the support column 10 is configured to extend and contract in the vertical direction by a hydraulic cylinder, it is easier to operate and lighter in weight than a hydraulic cylinder, thus facilitating handling and improving work efficiency. Can do. In addition, it is possible to eliminate the problem of soiling the place of use due to oil leakage or the like, as with a hydraulic cylinder.

  As described above, in the lifting device and the lifting method according to the present embodiment, the fulcrum P of the support frame 20 is merely brought into contact with the upper end 10a (support base 14) of the support column 10, and further the support frame. With a simple structure in which the pin 20 and the load receiving frame 30 are joined to each other, the vertical expansion and contraction of the column 10 can be smoothly operated. And since the tuning control of the support | pillar 10 becomes unnecessary, the reduction concerning the cost concerning an apparatus can be aimed at.

As mentioned above, although embodiment of the lifting apparatus and the lifting method by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, although the beam formwork 2 is a lifted object in the present embodiment, the present invention is not limited to this, and other materials can be lifted.
In this embodiment, the beam form 2 is lifted by using two lifting devices 1A and 1B. However, the number can be set as appropriate, and three or more lifting devices can be used. In addition, depending on the material, only one lifting device 10 may be used.

  Furthermore, in this Embodiment, it is set as the structure provided with the wheel 5 in the lower end of the support | pillar 10 as a moving means, However It is not limited to a wheel, For example, a roller material, a sliding material, etc. can be used. Such moving means can be omitted.

Furthermore, in the present embodiment, a structure using a hydraulic cylinder for the support 10 is used, but the structure is not limited to the hydraulic pressure, and may be a hydraulic cylinder, or a support having another telescopic structure. There may be.
Further, the configuration of the support frame 20, the cargo receiving frame 30, the support base 14, and the like is not limited to the present embodiment, and can be changed as appropriate. In the present embodiment, the drop-off prevention structure by the drop-off prevention pin 6 may be omitted or another configuration may be adopted.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

1, 1A, 1B Lifting device 2 Beam formwork (lifted object)
5 wheels (moving means)
6 Captive pin (pin member)
10, 10A, 10B Post 14 Support base 20, 20A, 20B Support frame 23 Protrusion part 30 Load receiving frame O Post axis G Floor surface P Support point R Connection part

Claims (5)

A lifting device that supports and lifts an object to be lifted from below,
A pair of struts arranged at opposing positions with a gap and extendable in the vertical direction;
A support frame that has a fulcrum that abuts on the upper end of each of the columns, protrudes outward in the radial direction centered on the central axis of the column, and extends downward.
A load receiving frame that connects a pair of lower ends of a support frame provided on one of the columns and a pair of lower ends of a support frame provided on the other column;
With
The lifting device, wherein the support frame and the load receiving frame are connected by pin joining.   The lifting device according to claim 1, wherein a moving means that is movable along the floor surface is provided at the lower ends of the pair of struts.   The lifting device according to claim 1 or 2, wherein a pin member is provided for gently fitting each of an upper end of the support column and the support frame in the vertical direction.   The lifting apparatus according to any one of claims 1 to 3, wherein the support column is expanded and contracted in a vertical direction by a hydraulic cylinder. A lifting method using the lifting device according to any one of claims 1 to 4,
A plurality of the lifting devices are arranged at intervals in one direction, and are lifted by supporting a predetermined position in the longitudinal direction of a long to-be-lifted object from below with each load receiving frame of the lifting device. Characteristic lifting method.

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