JPH08188374A - Iron plate gripping device - Google Patents

Abstract

PURPOSE: To carry out the laying work and the transfer of a floor iron plate simply, by installing rotatable a grip frame having a fixing claw at one end, to the lower side of a holding body through a rotary wheel, and pivoting a rotary claw rotatable by a hydraulic cylinder to the other end of the grip frame. CONSTITUTION: In order to grip a floor iron plate loaded on a large size truck, a boom or an arm is elevated as well as the upper side rotary body of a hydraulic shovel is rotated, so as to move an iron plate gripping device A to a specific position. Then, a pressure oil is delivered in the direction to contract the length of the rod of a hydraulic cylinder 15 through a rotary joint 16, in order to rotate the rotary claw 14 of the iron plate gripping device A, the rotary claw 14 is rotated to make the opening width between a fixed claw 13a and the rotary claw 14 at the maximum, one end of the floor iron plate is gripped by the fixed claw 13a, and after that, the hydraulic cylinder 15 is extended to rotate the rotary claw 14, and the floor iron plate is gripped perfectly. When the fixed claw 13a and the rotary claw 14 are contacted to the ground surface, the hydraulic cylinder 15 is extended, so as to release the gripping condition, and the floor iron plate is laid on the ground surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laying iron plate gripping device used for protecting scaffolds at construction sites such as civil engineering and construction, especially at construction sites where scaffolding is poor.

[0002]

2. Description of the Related Art Conventionally, at a construction site where the scaffolding is poor, the floor plate for protecting the scaffolding is generally 1.5 m × 6 m.
A fixed-length object (weight of about 1600 kg) is used, and it is carried into the site by a large truck, and a crane mounted on the large truck or another crane is used. The laying work of the iron plate was performed by so-called slinging work, in which the wire rope was hooked on the hook of the crane.

However, in such a method, about 1-2 workers are required for slinging work, and it is necessary to change the direction of the iron plate of the laying plate in consideration of the laying direction. It was very dangerous because he was going directly.
Therefore, in order to avoid such a risk, a method of performing laying work by attracting with an electromagnet called a lifting magnet has also been adopted.

However, even with this method, a worker is required in order to prevent the swinging of the iron plate of the floor plate, and since it is an electromagnet, the iron plate is attracted by excitation and released by demagnetization. If the power was suddenly turned off during work, the iron plate that had been adsorbed up to that point would fall, resulting in a serious injury.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above facts, and an object thereof is to easily perform the laying work and transfer of a laying plate iron plate at a construction site, and to separately An object is to provide an iron plate gripping device that does not require.

[0006]

In order to achieve the above object, according to the present invention, an iron plate gripping device capable of rotating 360 degrees is attached to the tip of an attachment of a construction machine such as a hydraulic excavator so that it can be lifted and lowered. The feature is that it is performed by a hydraulic cylinder.

[0007]

According to the iron plate gripping apparatus of the present invention, an operator of a construction machine such as a hydraulic excavator simply grips a floor plate iron plate mounted on a large truck by operating levers, pedals, etc. in a driver's cab, An iron plate can be laid in a predetermined position by turning or running, and if necessary, the direction of the iron plate can be freely changed by turning the turning wheel of the iron plate gripping device, thus eliminating the need for a sling operator. It is possible to safely and reliably perform the work of laying the iron plate.

[0008]

Embodiments of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a lower traveling body, and an upper revolving body 2 is rotatably mounted on the lower traveling body 1. A boom 3 is pivotally attached to a front portion of the upper revolving structure 2 by a boom cylinder 4, and an end of an arm 6 which is elevated by an arm cylinder 5 is pivotally attached to a tip end of the boom 3.
A rear upper end 7a of a support body 7 for holding the iron plate gripping device A is pivotally attached to the other end of the support plate 7, and a hydraulic cylinder 8 for raising and lowering the iron plate gripping device A is attached to the front upper end 7b of the support body 7 by a link mechanism 9
Is pivoted through. Support 7 is base plate 7
c and two vertical members, a hydraulic motor 10 for turning the iron plate gripping device A is fixedly mounted on the base plate 7c so that its output shaft faces downward between the two vertical members. A pinion 11 is attached to the output shaft of the motor 10. In addition, the base plate 7c of the support 7
An outer race 12a of the slewing wheel 12 is fixed to the inner race 12c, and an inner race 12c having an internal gear 12b that meshes with the pinion 11 is fixed to the upper end of a gripping frame 13 constituting the iron plate gripping device A. The gripping frame 1
A fixed U-shaped fixed claw 13a is fixed to one end of the grip 3, and is fixed to the other end of the grip frame 13 so that a rotating claw 14 that facilitates attachment / detachment of the iron plate is hydraulic. It is pivotally mounted by a cylinder 15. And
The other end of the hydraulic cylinder 15 is attached approximately in the middle of the grip frame 13.

Further, a rotary joint 16 for supplying pressure oil from the upper swing body 2 of the hydraulic excavator to the hydraulic cylinder 15 of the iron plate gripping device A is disposed in the center of the support 7, the swing wheel 12, and the grip frame 13. Has been done.

FIG. 3 shows another embodiment according to the present invention. Considering that the width of the iron plate of the floor plate may change, the opening widths of the fixed claw 13a and the rotating claw 14 of the grip frame 13 are shown. A plurality of pin holes are formed on the fixed claw side of the gripping frame 13 so that the fixed claw 13a can be attached and detached by a pin 13b.

Next, the operation of the present invention will be described. First, in order to grip the iron plate of the floor plate loaded on the large-sized truck, the upper revolving structure 2 of the hydraulic excavator is rotated and the boom 3 to the arm 6 are elevated, and the iron plate gripping device A is moved to a predetermined position. Next, in order to rotate the rotating claw 14 of the iron plate gripping device A, pressure oil is sent through the rotary joint 16 in the direction of contracting the rod of the hydraulic cylinder 15, and the rotating claw 14 is rotated to fix the fixed claw. The opening widths of 13a and the rotating claw 14 are maximized, first, one end of the iron plate of the floor plate is gripped by the fixed claw 13a, and then the hydraulic cylinder 15 is extended to rotate the rotating claw 14 to completely grip the iron plate of the floor plate. . After that, the upper swing body 2 is swung or the lower traveling body 1 is run, and when the predetermined position is reached, the boom 3 or the arm 6 is lowered and the fixed claw 13a or the rotating claw for holding the iron plate of the floor plate is rotated. When 14 touches the ground, the hydraulic cylinder 15 of the iron plate gripping device A
The length is shortened, the gripped state is released, and the iron plate is laid on the ground.

When it is desired to change the direction of the iron plate,
When pressure oil is supplied to the hydraulic motor 10 attached to the support 7 to drive the pinion 11, the inner race 12c having the internal gear 12b meshing with the pinion 11 turns,
At the same time, the iron plate gripping device A also swivels to freely change the direction of the iron plate of the floor plate. When the width of the iron plate of the floor plate changes, the mounting position of the fixing claw 13a to the grip frame 13 changes the width of the iron plate. It also becomes possible to grip different iron plates.

[0013]

According to the present invention, with the configuration described in detail in the above-mentioned embodiment, an operator of a construction machine such as a hydraulic excavator can operate a lever, a pedal, etc. in a driver's cab to mount it on a large truck. You can lay an iron plate at a predetermined position by gripping the iron plate and turning or running.
If necessary, by turning the swivel wheel of the iron plate gripping device, the direction of the iron plate can be freely changed, so a slinging worker is not required, and the iron plate can be laid safely and securely. Has a very remarkable effect.

[Brief description of drawings]

FIG. 1 is an overall side view of a hydraulic excavator adopting the present invention.

FIG. 2 is a sectional view of an iron plate gripping device according to the present invention.

FIG. 3 is a sectional view showing another embodiment of the iron plate gripping device according to the present invention.

[Explanation of symbols]

 A iron plate gripping device 7 support 10 hydraulic motor 11 pinion 12 swivel wheel 12a outer race 12b internal gear 12c inner race 13 gripping frame 13a fixed claw 14 rotating claw 15 hydraulic cylinder 16 rotary joint

Claims (4)

[Claims] 1. In a construction machine such as a hydraulic excavator in which a boom or an arm is pivotally mounted so as to be able to move up and down, a support body holding an iron plate gripping device is pivotally mounted so as to be able to move down and up at the tip of the boom or arm. A grip frame having a fixed claw at one end is rotatably attached to the lower part of the
An iron plate gripping device, wherein a turning claw capable of turning by a hydraulic cylinder is pivotally attached to the other end of the gripping frame. 2. The iron plate gripping device according to claim 1, wherein the slewing wheel has an internal gear that meshes with a pinion fixed to the output shaft of the slewing motor. 3. The iron plate gripping apparatus according to claim 1, wherein a rotary joint for supplying pressure oil to a hydraulic cylinder that rotates a rotating claw is provided at the center of the turning wheel. 4. A plurality of pin holes are formed on the fixed claw side of the grip frame so that the opening widths of the fixed claw and the rotary claw of the grip frame can be changed, and the fixed claw is removable. The iron plate gripping device according to claim 1.