JP2927731B2 - PC girder transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an operation of taking out a manufactured PC girder from a position where a PC girder is manufactured and transporting the same to a position other than the manufacturing position. The present invention relates to a PC girder transfer device used for a computer.

[0002]

2. Description of the Related Art In the construction of a bridge, a PC girder is manufactured at a construction site, and is moved laterally from a manufacturing position to a standby site.
The work to be made again at the manufacturing position is repeated, and the PC girder in the standby area is moved vertically to be installed between the piers. One of the above-mentioned operations is disclosed in Japanese Patent Publication No. 6-29489 as one of the devices used for performing a pre-emption operation of moving laterally from a manufacturing position to a standby place.

[0003] The apparatus according to the above publication is provided with self-propelled gantry on both parallel rails, establishes fixed columns at four corners of each gantry, and provides a movable gantry that moves up and down using each fixed column as a guide. The gantry is formed in a frame shape, a fixing pin is erected in the frame, and a girder nose is detachably attached to the fixing pin, and a means for raising and lowering the movable gantry is a pair of screw jacks. The two screw jacks are provided at the front and rear portions with respect to the traveling direction of the gantry. Moreover, when the movable gantry is moved up and down along the fixed columns, the movable gantry is provided with movable columns that cover the respective fixed columns so that the movable gantry does not swing sideways.

[0004]

The above device is constituted by a combination of four fixed columns, a pair of screw jacks, and a movable column for each fixed column so that the suspended PC girder does not swing. , Heavy machine, and 4 pins in addition to the fixed pins that are
Since the movable column and the cover are provided, the movable base itself is heavy, and a large torque is required for a drive source that moves the movable base up and down.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to reduce the weight and improve the PC girder so that it can be stably lifted.

It is still another object of the present invention to increase the vertical stroke while reducing the weight.

[0007]

A solution according to the present invention is that a pair of cylinders are fixed on a bogie traveling along a rail, spaced apart from each other and upright, and their piston rods are fixed to the bogie to form a cylinder body. Standing up and down, a guide facing each cylinder is erected on the carriage, and a support pin for detachably locking a beam bridged between the two cylinder bodies and supporting the PC girder is interposed. The two cylinder bodies are engaged with the guide via a slider.

Further, the support pin and the slider may be attached to a frame which is moved up and down by a cylinder body.

Further, it is preferable that the slider is provided so as to extend downward from a lower end of the cylinder body.

[0010]

According to the above means, by driving the two cylinders forward, each cylinder body rises along the opposing guide, and the beam attached to the support pin also rises. Further, it is lowered by driving both cylinders backward.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment of the present invention is to assemble on each of the bogies running along a pair of rails laid on the right and left, respectively. The embodiment will be described.

[0012] A pair of cylinders are arranged on the trolley at the front and rear portions with respect to the direction of transport along the rail, and the tip of the piston rod is fixed to the trolley, and the cylinder body is provided so as to move up and down.

Further, a pair of guides is erected on the trolley at a position closer to the end of each of the cylinders than the respective cylinders of the trolley so that the cylinder body is raised and lowered so as not to swing by a slider engaged with the guide. Has become.

Further, a support pin for detachably engaging a beam for holding the PC girder is interposed between the two cylinder bodies, and the beam engaged with the support pin is orthogonal to the traveling direction of the bogie. It protrudes in the direction.

There are two embodiments of means for interposing a support pin between the two cylinder bodies and means for engaging each cylinder body with a guide via a slider.

In the first embodiment, a support pin is directly fixed to both cylinder bodies, a longitudinal direction of the support pin is erected along the traveling direction of the bogie, and a slider is directly fixed to both cylinder bodies. By means of mounting.

The second mode is a means in which flanges are protruded from both cylinder bodies, a frame is mounted on both flanges, and a support pin and a slider are attached to the flanges. It is more preferable in terms of maintenance and the like.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The above-described embodiment according to the second embodiment will be specifically described. As shown in FIGS. 1 to 3, a bogie 1 includes wheels 4 traveling on rails 3 in front, rear, left and right of a base 2. , And one of the front and rear wheels 4 is driven forward and backward by the electric motor 5 and the chain 6.

A pair of cylinders 7, 7 are disposed on the base 2 of the carriage 1 so as to be upright at front and rear portions of a center line in the width direction of the base 2.
Is fixedly provided on the base 2. Cylinder 7
Is connected to the lower end side port 10 of the cylinder body 9 by connecting one end of the piping to the lower end side of the cylinder body 9. When the cylinder body 9 flows, the cylinder body 9 descends, and the cylinder body 9 rises by flowing from the piston rod 8 side.

Further, guides 11, 11 are set up on the base 2 of the carriage 1 further on the end side than the cylinders 7, 7. The guide 11 comprises a column 12 and a ridge 13 projecting from a surface facing the cylinder 7.
Numeral 3 protrudes over the entire length of the column 12, and the ridge 1
3 is provided with grooves 14 on the surface facing the cylinder 7 and on both side surfaces. It is to be noted that a hook 15 is protruded from the upper end of each column 12 and is lifted by a crane hook or the like.

Flanges 16 and 16 are protruded from the lower ends of the two cylinder bodies 9 and 9, respectively, and the frame 17 is fitted with the two flange bodies 16 and 16 with the two cylinder bodies 9 and 9 inserted therein. Sliders 18 and 18 are respectively provided on the surface of the frame 17 facing the ridge 13 so as to protrude therefrom. The slider 18 is formed in a U-shaped cross section so as to surround the ridge 13 and has a length extending downward from the cylinder body 9. The upper and lower portions of the surface of the slider 18 facing the ridge 13 and the upper and lower portions of each surface facing both side surfaces of the ridge 13,
Each is provided with a roller 19 which engages with the concave groove 14. The frame 17 may be bolted or welded to the flange 16.

Further, a support pin 20 is erected in the space of the frame 17 so that the longitudinal direction of the support pin 20 is parallel to the traveling direction of the carriage 1.
A beam 21 for clamping the PC girder W is attached to the support pin 20 in a saddle-like manner. The beam 21 is bent in an L-shape, and has a downward U-shaped locking portion 22 at the lower end of a portion bent downward. In this embodiment, a holding portion 23 is provided so as to be sandwiched from the surface.

The hydraulic unit 24 for driving each of the cylinders 7, 7 and the control panel 25 are mounted on a holding plate 26 which stands on the base 2 of the truck 1.
Is provided on the side opposite to the direction in which the beam 21 protrudes.

Although the hydraulic circuit is shown in FIG. 4, a flow divider 27 is interposed in the circuit so that both cylinders are synchronized.

As shown in FIG. 5, the condition where the PC girder W is transferred by the apparatus according to the present invention is as follows. The beam 21 is attached to both ends of the molded PC girder W via the holding portions 23. At this time, the roller 28 receiving the reaction force is moved to the tip of the beam 21 and the PC beam W.
Insert it between. Therefore, after each beam 21 is engaged with the support pin 20 by the existing crane, the hydraulic unit 24
To move the cylinder body 9 up, and then drive the electric motor 5 of the carriage 1 to transfer it to a predetermined position.

After the transfer, the cylinder body is lowered,
The operation of releasing the holding of the PC girder W, removing the beam 21, and then returning the carriage 1 to the original position is repeatedly performed.

[0027]

According to the PC girder transfer device of the present invention, a pair of guides is established on a self-propelled bogie, and a cylinder that moves up and down along each guide is fixed to the bogie with a piston rod fixed to the bogie. Is provided so as to move up and down, and is configured to move up and down a support pin for supporting the beam as the cylinder body moves up and down, since a pair of guides and a pair of cylinders are provided on a carriage as main members,
In addition to being able to achieve weight reduction, since the cylinder body is configured to move up and down by a guide via a slider, the PC girder suspended via a beam is kept in a stable state without swinging during lifting and lowering You can go up and down.

If the frame is provided with a support pin and a slider, and the frame is raised and lowered by the cylinder body,
The cylinder main body and the frame can also be incorporated separately, so that an effect that maintenance of the cylinder is facilitated is obtained.

Further, if the slider is provided so as to extend below the lower end of the cylinder main body, the stroke for ascending and descending the cylinder main body can be further increased, and even a wide PC girder can be reliably used. It can be transported.

[Brief description of the drawings]

FIG. 1 is a side view showing a PC girder transfer device according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view showing a main part, also cut away.

FIG. 4 is a circuit diagram showing one embodiment of a hydraulic circuit.

FIG. 5 is a perspective view showing a state in which a PC girder is transferred by the PC girder transfer device according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 cart 3 rail 7 cylinder 8 piston rod 9 cylinder body 11 guide 17 frame 18 slider 20 support pin 21 beam 24 hydraulic unit

Claims (3)

(57) [Claims] 1. A pair of cylinders (7) are mounted on a carriage (1) running along a rail (3) and spaced apart from each other and upright, and their piston rods (8) are attached to the carriage (1).
And a guide (11) facing each cylinder (7) is erected on a trolley (1) so that the cylinder body (9) is vertically movable up and down. The two cylinder bodies (9) are engaged with the guides (11) via the sliders (18) via support pins (20) for detachably locking beams (21) that support the PC girder and are cross-linked. A PC girder transfer device, comprising: 2. A pair of cylinders (7) are mounted on a carriage (1) running along a rail (3) at a distance from each other and upright, and their piston rods (8) are mounted on the carriage (1).
The cylinder body (9) is fixed upright so that the cylinder body (9) can be moved up and down, and a guide (11) facing each cylinder (7) is erected on the trolley (1). A frame (17) which moves up and down with the cylinder body (9), and a support pin (20) for detachably locking a beam (21) for supporting a PC girder on the frame (17).
And a slider (18) for engaging with the guide (11). 3. The PC girder transfer device according to claim 1, wherein the slider (18) is provided to extend downward from a lower end of the cylinder body (9).