JPH11335064A - Steel plate clamping device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel plate clamping device capable of easily performing laying work and a transfer feed of a decking steel plate in a construction site. SOLUTION: This steel plate clamping device capable of 360 degree turning is mounted up/down movably in an attachment tip end of a construction machine of hydraulic shovel or the like. The steel plate clamping device is constituted by a clamping part comprising a fixed pawl 13c sharpening a tip end to an inner side and a slide pawl capable of sliding by a hydraulic cylinder 15 to sharpen a tip end to an inner side and an attracting part (lifting magnet 18) assisting clamping of a steel plate. A decking steel plate is mounted and demounted by concurrently using the clamping part and the attracting part (lifting magnet 18).

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laying iron sheet gripping device used for protecting scaffolding in construction sites such as civil engineering and buildings, particularly in construction sites having poor scaffolding.

[0002]

2. Description of the Related Art Conventionally, in a construction site having a poor scaffold, a 1.5 m × 6 m fixed length object (weighing about 1600 g) is generally used as a laying iron plate for protecting the scaffold, and is carried into the site by a heavy truck. Then, using a crane mounted on the heavy truck or another crane, two wire ropes having claws for gripping an iron plate at both ends are hooked on the hook of the crane. I was going.

[0003] In the above-described method, 1
Approximately two workers are required, and it is necessary to change the direction of the slab plate in consideration of the laying direction, which is very dangerous because the worker directly performs the work. Therefore, in order to avoid such a danger, a method of laying by attracting with an electromagnet called a lifting magnet has been adopted.

[0004]

However, in the method using only the lifting magnet, an operator is required to prevent the loaded iron plate from swaying. Since the electromagnet is used, the iron plate is attracted by excitation and demagnetized. If you are working to release it but the power suddenly turns off during the work,
The drawback is that the iron plate that was adsorbed up to that point is extremely dangerous, such as falling down, leading to personal injury.In addition, the entire weight of the laid iron plate is suspended with a lifting magnet, so a very large lifting magnet is required and it is expensive. was there.

On the other hand, if it is attempted to hold the iron plate only with claws without using a lifting magnet, if a plurality of iron plates are stacked, it may be difficult to insert the claws between the iron plates, and a smooth operation is performed. There was a problem that it was not possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object to provide an iron plate gripping device which can easily perform the work of laying and transferring the iron plate at a construction site and does not require a separate worker or the like. With the purpose of providing
Especially, when iron plates are piled up on a heavy truck or the ground, even if it is not possible to hold each iron plate by the conventional method because there is no gap between the iron plates, it is possible to grip each iron plate, Further, it is another object of the present invention to provide an iron plate gripping device capable of performing work efficiently even when iron plates of different sizes are mixed.

[0007]

In order to achieve the above object, the present invention employs the following means. That is, the invention according to claim 1 is a construction machine such as a hydraulic shovel in which a boom or an arm is pivotably mounted so as to be able to move up and down. Pivotally attached, a gripping frame is pivotally attached to the lower part of the support via a revolving wheel, and a fixed claw whose tip is inwardly fixed at one end of the gripping frame, and a tip is inwardly mounted at the other end. A sharp sliding claw is slidably provided, a hydraulic cylinder for driving the sliding claw is mounted, and a lifting magnet is fixedly provided on the sliding claw side of the gripping frame.

That is, according to the first aspect of the present invention, for example, an iron plate gripper capable of turning 360 degrees is mounted on the attachment tip of a construction machine such as a hydraulic shovel so as to be able to ascend and descend. It consists of a holding part consisting of a fixed claw and a sliding claw slidable by a hydraulic cylinder and having a tip pointed inward, and an adsorption part (lifting magnet) for assisting the holding of the iron plate. The main feature is that it is performed by using a combination of a suction unit and a lifting magnet.

According to a second aspect of the present invention, in the first aspect of the present invention, it is possible to prevent deflection of the iron plate to be gripped by using one or both of the fixed claw and the sliding claw. It is characterized by:

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an overall side view of a hydraulic shovel employing this embodiment, FIG. 2 shows a cross-sectional side view of an embodiment of a gripper according to the present invention, and FIG. 3 shows an embodiment of a suction unit according to the present invention. FIG. 4 shows a sectional side view. FIG. 4 is a sectional plan view of an embodiment according to the present invention.

In FIGS. 1 and 2, reference numeral 1 denotes a lower traveling body.
An upper swing body 2 is mounted on the lower traveling body 1 so as to be swingable. A boom 3 is pivotally attached to a front portion of the upper revolving unit 2 by a boom cylinder 4 so as to be able to move up and down. One end of an arm 6 which is raised by an arm cylinder 5 is pivotally attached to a tip of the boom 3. At the other end, a rear upper end 7a of the support 7 holding the iron plate gripping device A is pivotally mounted. A hydraulic cylinder 8 for raising and lowering the iron plate gripping device A has a link mechanism 9 at the front upper end 7b of the support 7. Has been pivoted through. The support 7 includes a base plate 7c and two vertical members 7d, 7d.
The hydraulic motor 10 for turning the iron plate gripping device A is fixedly mounted on the base plate 7c between the two vertical members 7d, 7d so that the output shaft thereof faces downward,
A pinion 11 is attached to the output shaft of the hydraulic motor 10.

An outer race 12a of a revolving wheel 12 is fixedly mounted on a base plate 7c of the support 7, and an inner race 12c having an internal gear 12b meshed with the pinion 11 has a gripping frame 13 constituting an iron plate gripping device A. The upper end is fixed. A fixed claw 13c having a sharp tip is fixed to an axle 13a protruding at one end of the gripping frame 13, and a sliding claw for facilitating attachment / detachment of a floor plate to an axle 13b protruding at the other end of the gripping frame 13. 1
4 is slidably mounted, and one end of the sliding claw 14 has a rod end of a hydraulic cylinder 15 pivotally mounted on a pin 16, and the other end of the hydraulic cylinder 15 is attached to a bracket 13 d fixed to a gripping frame 13. It is axially mounted by a pin 17.

Further, a concave portion is provided on the holding surface (contact surface) of the base plate of the holding frame 13, and a lifting magnet 18 is fitted into the concave portion with the suction surface facing downward, and the lifting magnet 18 is attached to the upper rotating body 2. It is excited by energization from a mounted generator (not shown).

The support 7, the turning wheel 12, and the grip frame 1
At the center of 3 is mounted a rotary joint 20 for supplying pressure oil from the upper swing body 2 of the excavator to the hydraulic cylinder 15 of the iron plate gripping device A.

Next, the operation of the present invention will be described. First, in order to grip a floor iron plate loaded on a heavy-duty truck or a floor iron plate stacked on the ground, the upper swing body 2 of the hydraulic shovel is turned and the boom 3 to the arm 6 are raised and lowered. A is moved to a predetermined position.
Next, in order to slide the sliding claw 14 of the iron plate gripping device A, pressure oil is sent through the rotary joint 20 in a direction in which the rod of the hydraulic cylinder 15 is extended or contracted.
4 is pushed out or retracted to fix the fixed claw 13c and the sliding claw 14
The width of the opening is slightly larger than the width of the iron plate, so that the iron plate and the attraction surface of the lifting magnet 18 can be brought into contact.

When the boom 3 or the arm 6 is rotated from this state, the iron plate and the attraction surface of the lifting magnet 18 are brought into contact with each other to excite the lifting magnet 18 and slightly rotate the boom 3 or the arm 6. The bottom plate iron plate on the side of the fixed claw 13c is supported by another bottom plate iron plate below it, and only the bottom plate iron plate on the sliding claw 14 side is slightly lifted, so that a gap is created between the bottom plate iron plate below it and another bottom plate plate. .
In this state, the hydraulic cylinder 15 is contracted and the sliding claw 14 is
When the hydraulic cylinder 15 is further reduced in length, the other end of the iron plate is gripped by the fixed claws 13c, and the iron plate is securely gripped.

At this time, this operation can be performed smoothly by switching the excitation and demagnetization of the lifting magnet 18 as necessary. Thereafter, the boom 3 or the arm 6 is raised and lowered, the upper revolving unit 2 is turned, or the lower traveling unit 1 is moved, and when reaching a predetermined position, the boom 3 or the arm 6 is raised and lowered, and When the fixed claw 13c through the sliding claw 14 for gripping the ground contact the ground, the hydraulic cylinder 15 of the iron plate gripping device A is extended, the gripping state is released, and the sheet metal plate is laid on the ground.

If you want to change the direction of the iron plate,
When pressure oil is supplied to the hydraulic motor 10 attached to the support 7 and the pinion 11 is driven, the inner race 12c having the internal gear 12b meshing with the pinion 11 turns,
At the same time, the iron plate holding device A also turns, and the direction of the iron plate can be freely changed.

[0019]

According to the present invention, a construction machine such as a hydraulic excavator operates a lever, a pedal or the like in a cab to operate a large truck or ground on the ground by the configuration and operation described in detail in the above embodiment. By gripping the floor iron plate piled on the iron plate and turning or traveling, the iron plate can be laid at a predetermined position, and if necessary, by turning the turning wheel of the iron plate gripping device, The orientation can be changed freely, eliminating the need for a slinging operator, making it possible to lay the iron plate safely and securely.Furthermore, even if the size of the iron plate to be gripped changes, the hydraulic cylinder expands and contracts to fix the claws and slide. Since the opening width of the moving nail can be freely adjusted, work can be performed efficiently even when iron plates of different sizes are mixed.

When a nail is inserted between the stacked iron plates, it can be easily inserted because a lifting magnet is used, and the lifting magnet does not support the entire weight of the iron plate but also has two minutes of the iron plate. Since it is only necessary to support the weight of (1), an extremely inexpensive lifting magnet having a small diameter may be used.

[Brief description of the drawings]

FIG. 1 is an overall side view of a hydraulic shovel employing this embodiment.

FIG. 2 is a cross-sectional side view of an embodiment of a gripper according to the present invention.

FIG. 3 is a cross-sectional side view of an embodiment of the suction unit according to the present invention.

FIG. 4 is a cross-sectional plan view of an embodiment according to the present invention.

[Explanation of symbols]

 A Iron plate gripping device 7 Support 10 Hydraulic motor 11 Pinion 12 Slewing wheel 12a Outer race 12b Internal gear 12c Inner race 13 Gripping frame 13a Axle 13b Axle 13c Fixed claw 14 Sliding claw 15 Hydraulic cylinder 18 Lifting magnet

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[Procedure amendment]

[Submission date] June 5, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

2. Description of the Related Art Conventionally, in a construction site having a poor scaffold, a 1.5 m × 6 m fixed length object (weight of about 1600 kg ) is generally used as a laying iron plate for scaffolding protection. Laying work on the iron plate by so-called sling work, in which a crane carried in and mounted on the heavy truck or another crane hooks two wire ropes having claws for gripping an iron plate on both ends on hooks of the crane. Had gone.

Claims (2)

[Claims] 1. A construction machine, such as a hydraulic shovel, having a boom or an arm pivotally attached thereto so as to be able to move up and down. A gripping frame is pivotally attached to the lower part of the body via a revolving wheel, a fixed claw whose tip is sharpened inward is fixed to one end of the gripping frame, and a sliding claw whose tip is sharpened inward is fixed to the other end. An iron plate gripping device for construction machinery, wherein a hydraulic cylinder for driving the sliding claw is provided slidably, and a lifting magnet is fixed to the sliding claw side of the gripping frame. 2. The iron plate gripping device for a construction machine according to claim 1, wherein a swing of the iron plate to be gripped can be prevented by using one or both of the fixed claw and the sliding claw. . [0001]