JP2009173120A - Lifting assisting device for alc reinforced reinforcing basket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lifting assisting device for an ALC reinforcing bar basket which can assist lifting of a heavy object, reduce workload, improve work efficiency, and achieve both of excellent rotation property and straight advancing property simultaneously in a process for assembling the ALC reinforcing bar basket being the work for handling the heavy object. <P>SOLUTION: In this lifting assisting device for the ALC reinforcing bar basket, a main frame (2), a first elevating frame (3), and a second elevating frame (6) are constituted by rail members to slide in the vertical direction in substantially the same plane. A cylinder (10) displaces a piston in the vertical direction by pneumatic pressure, one end of a wire member (5) is fixed on the main frame (2), and the other end of the wire member (5) is fixed on the second elevating frame (6) via a pulley (4) to constitute a speed increasing mechanism. As a result, the first elevating frame (3) rises and falls for the main frame (2) due to the displacement of the piston in the cylinder (10), and the second elevating frame (6) rises and falls due to the displacement twice that of the piston by the speed increasing mechanism. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lifting assist device for an ALC reinforced steel bar used in an assembly process of an ALC reinforced steel bar in a manufacturing process of ALC (lightweight cellular concrete) used as an outer wall material of a building.

  In general, ALC panels are made of ALC raw material slurry consisting mainly of silica, quicklime, cement, etc. in the form of a reinforcing bar made by welding steel wires and assembled in a bowl shape. Add powder, inject, foam and harden the ALC block that has become semi-cured, remove it from the mold, and twist it with a predetermined tension into a wire with a predetermined size, such as a piano wire. Disconnect. Subsequently, the cut semi-cured ALC panel is cured with an autoclave or the like, and then subjected to surface treatment or the like as appropriate to produce a product.

  The reinforcing reinforcing bar rod is fixed inside the ALC panel thus produced. As a method for holding the reinforcing reinforcing rod rod in the middle of the production process, a support pin insertion port is provided on the long side of the reinforcing reinforcing rod rod. And a method of inserting the support pin into the support pin insertion opening is employed. The support pin is hung by a protrusion from a support pin frame passed in a bridge shape above the formwork.

  For example, as disclosed in Japanese Patent No. 3116823, a reinforcing steel bar is generally used in a bar shape by welding a steel bar having a diameter of about 4 mm to 8 mm. Usually, the steel bar is welded in a lattice shape. Two reinforcing bar nets are arranged in parallel at a predetermined interval and combined. The connection between the two rebar screens is the case where the spacer rebars that serve as the support pin insertion holes are welded to the long edge on both sides, the large rebar net is bent into a U-shape, and the long side open surface In some cases, the spacer rebar is welded only to the side.

  When attaching the obtained reinforcing bar to the support pin, the tip of the support pin is arranged at a height of about 1,600 mm to 1,700 mm from the ground so that the work can be easily performed. Lift up with hand and attach. However, the mass of the reinforcing steel bar is dependent on the width and length of the ALC panel to be manufactured, but the maximum is more than 30 kg, so the work load is high. It was a heavy work, and there was a need to eliminate the risk of developing back pain and save labor.

  Conventionally, in order to move the ALC reinforced steel bar from its manufacturing / storage location to the manufacturing location of the ALC panel, a general hand-held transport cart has been used. In such a general hand-held transport cart, as shown in the bottom view shown in FIG. 6, the bottom surface (2b) that is substantially parallel to the floor surface is rotated on one side in the traveling direction and on both sides in the width direction. Two fixed casters (1a, 1b) with fixed shafts are respectively attached to two swivel casters (1c, 1d) whose rotary shafts are rotatable on both sides in the width direction on the other side in the traveling direction. .

  Therefore, in such a transport cart, the direction of starting from the stopped state starts in a direction depending on the state of the turning caster, and in order to go in a different direction, the whole is rotated about the fixed caster as an axis. It is selected whether to start again from the beginning, or after the start, to turn the turning caster whose rotating shaft is rotatable little by little. Thus, in the conventional conveyance trolley, there is a problem that the starting direction is limited.

  Also, while running a conventional transport carriage, the wheel of the turning caster whose rotation axis can freely rotate, due to the delicate force in the left and right direction included in the force when pushing the handle frame, the unevenness of the floor surface, Since the direction is always changed, there is a problem that attention must always be paid to the pushing direction so as to go in the traveling direction in which the handle frame travels.

  Further, even when it is desired to go straight after starting the vehicle, there is a problem in that it deviates from the direction in which it is desired to proceed depending on the magnitude of the eccentric value and the rotational speed of the rotating caster whose rotating shaft is rotatable.

  As described above, the conventional transport cart has a problem that the traveling direction is not stable when the handle frame is pushed and started straight, and further, for example, a narrow warehouse where there is no space for turning. However, there is a problem that it takes time and effort because it cannot move in a direction different from the direction in which it started, or turn on the spot.

In particular, when a heavy object such as a reinforcing bar is transported, the transporting operation is extremely troublesome, and there is a risk that the reinforcing bar will fall due to an unreasonable operation.
Japanese Patent No. 3116823

  It is an object of the present invention to assist in lifting and transporting heavy objects in the assembly process of ALC reinforced steel bar, which is heavy work, and to reduce work load and improve work efficiency. It is to provide an ALC-reinforced reinforcing bar lifting assist device that achieves both straightness and straightness.

The ALC reinforced steel bar lifting assist device according to the present invention is:
A cylinder that displaces the piston vertically;
A main frame with the cylinder fixed upward;
A first elevating frame connected to the piston and including a pulley having a horizontal rotation axis on an upper end side, and arranged to be slidable in a vertical direction with respect to the main frame;
A second lifting frame arranged to be slidable in a vertical direction with respect to the first lifting frame;
A work table fixed to the upper end side of the second lifting frame;
One end is fixed to the lower end side of the main frame, the other end is fixed to the lower end side of the second elevating frame, and the wire member is suspended in the pulley at an intermediate portion;
Is provided.

  With this structure, due to the displacement of the piston in the cylinder, the first elevating frame moves up and down with the same displacement relative to the main frame, and the second elevating frame moves up and down with a double displacement.

  The work table and the second lifting frame are connected by pin support at one point on the vertical line with respect to the center of gravity of the work table, so that the work table can swing with respect to the second lifting frame. Is preferred.

  Moreover, it is preferable to arrange | position a caster in the bottom face of the lower end part of the said main frame so that conveyance is possible.

  In addition, regarding this caster, it is preferable to arrange the caster as follows, unlike the caster arrangement in the conventional general transport carriage.

That is, at the four corners of the bottom surface of the lower end of the main frame, two fixed casters are disposed along the traveling direction on one side in the width direction, and two swivel casters are disposed along the traveling direction on the other side in the width direction. And the up-and-down turning caster is disposed at a substantially intermediate position in the traveling direction of the two fixed casters,
In the fixed caster, the rotation axis is fixed to the bottom surface so that the rotation surface is along the traveling direction,
The swivel caster is rotatably fixed to the bottom surface in a state where the rotation axis is parallel to the bottom surface,
The up-and-down swivel caster is fixed to the bottom surface so that the rotation shaft can freely move up and down with respect to the bottom surface, and the rotation shaft is parallel to the bottom surface. In the state where the lifting / lowering turning caster is fixed at the farthest position relative to the bottom surface, the two turning casters and the lifting / lowering turning caster are grounded, In the state of being fixed at a position closest to the bottom surface, it is preferable that the two fixed casters and the two swivel casters are grounded.

  As a result, in the grounding state of the up-and-down swivel caster, the auxiliary device is supported by the swivel caster at three points and can turn. In the ungrounded state of the up-and-down swivel caster, the auxiliary device is It is supported and straight running is possible.

  Since the ALC reinforced rebar bar lifting assist device of the present invention lifts most of the mass of the ALC reinforced bar bar by the balancer function of the cylinder, the physical burden on the operator is reduced, and further the work efficiency is improved. Can do.

  Furthermore, since the extending structure is a double speed mechanism, the height of the work table when the first elevating frame and the second elevating frame are located at the lowest position is set so that it is difficult to place a burden on the operator. Is about 1,600mm to 1,700mm, which is the height that the work table needs to reach when assembling the ALC reinforced steel bar, even if it is set low so that the height around the waist is about 800mm Can be secured.

  Further, the work table and the second lifting frame are connected by pin support at one point on the vertical line with respect to the center of gravity of the work table, so that the work table can swing with respect to the second lifting frame. . As a result, when inserting the support pin into the spacer portion of the ALC reinforcing bar rod, the position and angle of the ALC reinforcing bar rod can be adjusted as in the case of hand assembly, and the work can be performed without increasing the load. The effect that efficiency improves is acquired.

  Furthermore, if a lifting and lowering caster that is rotatable in a state where it can be raised and lowered is suspended in the air, the advancing direction depends straight on the rotation direction of the wheel of the fixed caster. If a material with a large friction coefficient is used, the restraint force in the direction of travel is increased, so that straightness is more stable. As a result, in linear reciprocating travel between two points, there is no deviation of the travel axis, and stable straightness can be obtained. On the other hand, if the lifting / lowering swivel caster is grounded, it is grounded by the two swiveling casters, and can be freely swung back and forth and left and right. Therefore, the workability in transporting the ALC reinforced steel bar is remarkably improved, and the safety is remarkably improved as compared with the work by the conventional transport carriage.

  Hereinafter, the present invention will be specifically described based on an embodiment shown in the drawings. FIG. 1 is a perspective view showing an embodiment of the ALC-reinforced reinforcing bar lifting assist device of the present invention. FIG. 2 is a perspective view showing a state where the ALC-reinforced reinforcing bar lifting support device of FIG. 1 is extended. FIG. 3 is a perspective view showing a state in which the ALC reinforced reinforcing bar rod is placed on the ALC reinforced reinforcing rod lifting auxiliary device of the present invention and extended.

  The main frame (2) has two legs that extend parallel to the direction of travel, a connection that connects the legs in the middle of the direction of travel, and the position in the direction of travel is shifted from the position of the legs. And an arm portion extending in a vertical direction in a state. The said leg part and a connection part are equivalent to a lower end part. In the embodiment, the lower end portion is H-shaped as shown in FIGS. 1 and 2, but as shown in FIGS. 4 and 5, the flat plate structure is the same as the bottom surface of the conventional carriage. Any structure can be adopted as long as it can support other structures and can fix the casters appropriately.

  A cylinder (10) is fixed upward on the upper surface side of the connecting portion which is the lower end portion of the main frame (2). The cylinder (10) displaces the piston in the vertical direction by means such as air pressure or hydraulic pressure. More specifically, the cylinder (10) functions as a balancer that applies a force that balances the load by converting the load of the load body into air pressure, thereby allowing the load body to be freely moved by a slight force of the operator. It can be moved up and down. As such a balancer mechanism, a known one can be adopted.

  The first elevating frame (3) is composed of a substantially rectangular frame member comprising two vertical frames extending in the vertical direction and two horizontal frames extending in the width direction. The vertical frame and the horizontal frame on the lower end side are in the same plane, but the frame on the upper end side is substantially U-shaped and protrudes from the plane to one side in the traveling direction.

  The width of the first elevating frame (3) is defined so as to be accommodated in the width direction in the main frame (2), and the width direction inner side of the arm portion of the main frame (2) and the vertical length of the first elevating frame (3). The first elevating frame (3) is arranged to be slidable in the vertical direction with respect to the main frame (2) by providing a rail member (7) or a rail mechanism on the outer side in the width direction of the frame. Is done. The end of the piston rod of the cylinder (10) is fixed to the lower end side of the arm on the upper end side of the first elevating frame (3), and the first elevating frame (3) is in the vertical direction of the piston rod. It is possible to move with the displacement.

  Pulleys (4) having a horizontal rotation axis are fixed at two places in the width direction of the horizontal frame on the upper end side of the first elevating frame (3). Specifically, a flat plate-like support member is fixed to the horizontal frame by welding or the like, and the rotating shaft of the pulley (4) is fixed to the support member.

  The second elevating frame (6) includes two vertical frames extending in the vertical direction and two horizontal frames extending in the width direction, and includes a substantially rectangular frame member in the same plane. The width of the second elevating frame (6) is defined so as to be accommodated in the width direction within the first elevating frame (3), the inner side in the width direction of the vertical frame of the first elevating frame (3), and the second elevating frame ( 6) The second elevating frame (6) slides in the vertical direction with respect to the first elevating frame (3) by providing a rail member (7) or a rail mechanism on the outer side in the width direction of the vertical frame. Arranged as possible.

  A work table (8) is fixed upward to the upper side horizontal frame of the second elevating frame (6).

  One end of the wire member (5) is fixed to the connecting member of the main frame (2), and the other end of the wire member (5) is connected to the lower end side of the second elevating frame (6) via the pulley (4). Fixed to the horizontal frame. The wire member is suspended around a pulley (4).

  As the first elevating frame (3) rises, the wire member (5) acts to pull up the second elevating frame (6) via the pulley (4). Thereby, the 2nd raising / lowering frame comprises the double speed mechanism which raises with respect to the main frame (2) at the double speed of the 1st raising / lowering frame (3). That is, the displacement of the piston of the cylinder (10) causes the first elevating frame (3) to move up and down with the same displacement relative to the main frame (2), and the second elevating frame (6) is moved to 2 by the above-described double speed mechanism. It moves up and down with double displacement.

  Each member is formed by a known processing technique using a material capable of supporting a heavy object such as an ALC reinforced reinforcing bar, such as steel or reinforced plastic.

  By adopting such a structure, it is possible to automatically drive the piston that receives the load of the ALC reinforcing bar rod (30), which is the load body, by the cylinder balancer function using the existing pneumatic system or hydraulic system. The heavy work when assembling the ALC reinforcing bar rod (30) is assisted, the load on the operator is reduced, and the work efficiency is improved.

  Regarding the amount of displacement, even if the lowest height is set to about 800 mm, which is less burdensome to the operator, the highest height is 1,600 mm, which is the height at the completion of assembly, while maintaining the balancer function. It is possible to set up to about ˜1,700 mm.

  The work table (8) and the second elevating frame (6) are connected by pin support at one point on the vertical line with respect to the center of gravity of the work table, whereby the work table (8) is moved up and down in the second direction. It can swing with respect to the frame (6). With such a structure, when the support pin (not shown) is passed through the support pin insertion port (31) of the ALC reinforcing bar rod (30), the angle formed by the ALC reinforcing bar rod (30) with respect to the support pin is increased. Since it can be freely adjusted, the assembly can be improved.

  If the main frame (2) is provided with a fixed caster (1) as shown in FIGS. 1 to 3 as in the prior art, the ALC reinforced steel bar (30) is placed on the main frame (2). Although it is possible to move to the attachment place and the work load is reduced, as shown in FIG. 4 and FIG. It becomes possible.

  FIG. 4 is a projection view showing a main frame of a different embodiment of the ALC reinforced steel bar lifting assist device of the present invention, and FIG. 5 is a projection view showing different states of the main frame of FIG. However, as described above, the structure of the main frame is not limited to such a shape.

  The main frame has a bottom surface (2a) that is substantially parallel to the floor surface, and two fixed casters (1a, 1b) and two swivel casters (1c, 1d) at the four corners of the bottom surface (2a). Is arranged, and the up-and-down turning caster (1e) is arranged at a substantially middle position of the fixed casters (1a, 1b). The two fixed casters (1a, 1b) are fixed to the bottom surface (2a) such that the rotation axis is fixed to the bottom surface (2a), and the rotation surfaces are parallel or the same and front and rear in the traveling direction. The two swivel casters (1c, 1d) are rotatably fixed to the bottom surface (2a) in a state where the rotation axis is parallel to the bottom surface (2a). The lifting / lowering swivel caster (1e) is fixed to the bottom surface (2a) so that the rotating shaft can freely move up and down with respect to the bottom surface (2a) and the rotating shaft can be rotated in parallel with the bottom surface (2a).

  Furthermore, a lifting / lowering lock mechanism (12) for fixing the lifting / lowering swivel caster (1e) at the farthest position and the closest position to the bottom surface (2a) is provided, and the lifting / lowering swivel caster (1e) is the most to the bottom surface (2a). In a state of being fixed at a distant position, the two swivel casters (1c, 1d) and the lift swivel caster (1e) are grounded and swivel, and the lift swivel caster (1e) is closest to the bottom surface (2a). In the state fixed at, the vehicle is grounded and travels straight by two fixed casters (1a, 1b) and two swivel casters (1c, 1d).

  Therefore, in the state where the up-and-down swivel caster (1e) floats in the air, the traveling direction is restricted, so that high straightness is obtained, and the two fixed casters (1a, 1b) are strong against the floor material. If a wheel having a friction coefficient is selected, the restraining force in the traveling direction becomes stronger. Further, by increasing the number of fixed casters with the rotation axis fixed to the bottom surface (2a) and the rotation surfaces fixed to be parallel or the same, the number of fixed casters can be increased to three or more, thereby achieving more stable straight traveling performance. Is obtained.

  In addition, in a state where the up-and-down swivel caster (1e) is in contact with the ground, it is possible to travel freely forward, backward, left and right.

  As long as the caster itself can support a heavy object, any one of known techniques can be arbitrarily adopted. Further, the elevation lock mechanism (12) may be selected at any time from any known technique such as a cam mechanism or a clamp mechanism. Moreover, what is necessary is just to select the operation method of a raising / lowering lock mechanism (12) at timely, such as the remote control type by a cable, and the stepping type shown in figure.

It is a perspective view which shows one Embodiment of the ALC reinforced steel bar lifting assistance apparatus of this invention. It is a perspective view which shows the state which extended the ALC reinforcement rebar reinforcement lifting assistance apparatus of FIG. It is a perspective view which shows the state which mounted and extended the ALC reinforcement reinforcement rod in the ALC reinforcement reinforcement rod lifting auxiliary apparatus of FIG. It is a projection view which shows the main frame of different embodiment of the ALC reinforced steel bar lifting auxiliary | assistance apparatus of this invention. It is a projection figure which shows the different state of the main frame of FIG. It is a bottom view which shows the general caster arrangement | positioning of the conventional hand-held conveyance trolley | bogie.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Caster 1a, 1b Fixed caster 1c, 1d Revolving caster 1e Elevating / revolving caster 2 Main frame 2a, 2b Bottom surface 3 First elevating frame 4 Pulley 5 Wire member 6 Second elevating frame 7 Rail member 8 Work table 10 Cylinder 12 Elevating lock mechanism 30 ALC reinforced steel bar 31 Support pin insertion slot

Claims (4)

A cylinder that displaces the piston vertically;
A main frame with the cylinder fixed upward;
A first elevating frame that is connected to the piston rod and includes a pulley having a horizontal rotation axis on an upper end side, and is arranged to be slidable in a vertical direction with respect to the main frame;
A second lifting frame arranged to be slidable in a vertical direction with respect to the first lifting frame;
A work table fixed to the upper end side of the second lifting frame;
One end is fixed to the lower end side of the main frame, the other end is fixed to the lower end side of the second elevating frame, and the wire member is suspended in the pulley at an intermediate portion;
An ALC reinforced steel bar lifting assist device characterized by comprising:   The work table and the second lifting frame are connected by pin support at one point on the vertical line with respect to the center of gravity of the work table, so that the work table can swing with respect to the second lifting frame. The ALC reinforced steel bar lifting assist device according to claim 1.   The ALC reinforced steel bar lifting assist device according to claim 1, wherein a caster is disposed on a bottom surface of the lower end portion of the main frame. Two fixed casters are disposed along the traveling direction on one side in the width direction, and two swivel casters are disposed along the traveling direction on the other side in the width direction at the four corners of the bottom surface of the lower end of the main frame, and An up-and-down turning caster is disposed at a substantially intermediate position in the traveling direction of the two fixed casters,
In the fixed caster, the rotation axis is fixed to the bottom surface so that the rotation surface is along the traveling direction,
The swivel caster is rotatably fixed to the bottom surface in a state where the rotation axis is parallel to the bottom surface,
The up-and-down swivel caster is fixed to the bottom surface so that the rotation shaft can freely move up and down with respect to the bottom surface, and the rotation shaft is parallel to the bottom surface. In the state where the lifting / lowering turning caster is fixed at the farthest position relative to the bottom surface, the two turning casters and the lifting / lowering turning caster are grounded, 3. The ALC reinforced steel bar lifting assist device according to claim 1, wherein two fixed casters and two swivel casters are grounded in a state of being fixed at a position closest to the bottom surface.

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