JP3110304B2 - Mold steel gripping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gripping device for gripping a shape steel, and more particularly to a gripping device for gripping a shape steel having a desired sectional shape.

[0002]

2. Description of the Related Art When performing underground construction such as subway construction or construction on a basement floor of a building, an erection demolition machine is used to prevent swelling and collapse of piles for retaining soil such as sheet piles buried in a wall. The erection and dismantling of the section steel that supports the pile by erection in the excavated underground space is performed. At the end of the arm of the erection demolition machine, a gripping device equipped with a cylinder that can be driven by hydraulic pressure is mounted so that it can move up, down, back and forth, and rotatably. The work is performed by moving the gripped steel model up and down, back and forth, and rotating. Further, the gripping device has a movable claw and a fixed claw having gripping surfaces parallel to each other for holding the mold steel, and drives the movable claw while maintaining the gripping surfaces of the movable claw and the fixed claw parallel to each other. In this way, the mold steel is gripped.

[0003]

When an H-shaped steel having an H-shaped cross section is gripped by such a gripping device, two ribs are sandwiched between a movable claw and a fixed claw. The shape steel can be completely gripped. However, in the case of a section steel having an I-shaped cross section, the web is relatively long and the distance between the ribs is large, so that only one of the ribs can be gripped. As a result, the section steel can be stably gripped. Can not. An object of the present invention is to provide a member having a large gap between ribs such as an I-beam,
An object of the present invention is to provide a gripping device for a mold steel that can be gripped stably.

[0004]

FIG. 1 shows an embodiment of the present invention.
The present invention will be described with reference to FIGS. 3 to 3. The present invention according to claim 1 is a gripping member 52, 54 comprising fixed claws and movable claws having mutually parallel gripping surfaces for holding a mold steel.
And driving means 53 and 62 for driving the movable claw 54 while maintaining the gripping surfaces of the gripping members 52 and 54 parallel to each other by a parallel link mechanism 53. , 54 are provided with fixing members 1 and 2 each having a block having a concave portion for fixing the shape steel 10 having a predetermined shape to each holding surface.

[0005] Referring to FIGS. 7 to 10, according to a second aspect of the present invention, at least one of the fixing members 1 and 2 comprises:
It further includes moving means 11, 15, 16, and 54a movable along the grip surface in the front-rear direction of the grip surface.

Here, the front-rear direction refers to the front-rear direction of, for example, an erecting and dismantling machine provided with the gripping device according to the present invention.

According to the first aspect of the present invention, the shape steel 10 having a desired shape such as an I-shaped steel is fixed to the holding members 52 and 54 by the fixing members 1 and 2 provided on the holding members 52 and 54. Is grasped.

According to the second aspect of the present invention, when the distance between the gripping surfaces is changed according to the size and shape of the shape steel 10, the moving members 11, 15, 16, 54a are used to fix the fixing members 1, 2,.
Is moved, the positions of the fixing members 1 and 2 can be adjusted to the size and shape of the changed shape steel.

Incidentally, in the section of the means for solving the above-mentioned problem which explains the configuration of the present invention, figures and reference numerals of the embodiments are used to facilitate the description of the present invention. The invention is not limited to the embodiments.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional side view showing a configuration of a first embodiment of a gripping device according to the present invention, and FIG.
FIG. 3 is a side view showing an embodiment of the construction demolition machine to which the gripping device according to the present invention is applied, and FIG. 3 is a plan view of the construction demolition machine of the embodiment shown in FIG. First, the configuration of the erection demolition machine will be described with reference to FIGS.

As shown in FIGS. 2 and 3, the excavator main body 23 is constructed by installing an upper revolving unit 22 on a lower traveling unit 20 via a revolving unit 21. 2
Reference numeral 4 denotes a bracket fixedly installed on the upper revolving unit 22, and when used as a hydraulic excavator, the boom and the boom cylinder are connected by pins. In this embodiment, a pin hole of the bracket 24 is used. The mast 25 is replaceably attached to a boom or a boom cylinder by means of pins 26 and 27.

A telescopic arm 30 is mounted on the top of the mast 25 by a hydraulic cylinder 29 for raising and lowering around a pin 28a. More specifically, the telescopic arm 3
0 is attached to the upper part of the outer cylinder 25b by a pin 28a,
The tube end of the elevating cylinder 29 is attached to the lower part of the outer cylinder 25b with a pin 28b. The telescopic arm 30 is a mast 2
5, an outer cylinder 32 connected to the outer cylinder 3 by a pin 28a.
2 comprises an inner cylinder 31 slidably fitted to 2 and a telescopic hydraulic cylinder 33 incorporated therein. The base end of the telescopic hydraulic cylinder 33 is the outer cylinder 32, and the piston rod is the inner cylinder 31.
Connected to each other. The stroke of the telescopic arm 30 is set to be larger than the amount of movement that can release the mold steel from the state where the mold steel is gripped, that is, the width of the mold steel.

An inner cylinder 31 of the telescopic arm 30 accommodates a hydraulic cylinder 41 for swinging up and down, which will be described later. The base end of the hydraulic cylinder 41 is connected to the inner cylinder 31, and the piston rod is connected to a link 75 which will be described later.

As shown in FIGS. 2 and 3, the distal end of the telescopic arm 30, that is, the distal end of the inner cylinder 31, is provided with a gripping device 3.
4 is attached via a vertical swing device 35, a left and right swing device 36, and a swivel device 37. The vertical oscillating device 35 is connected to a bracket 38 attached to the distal end of the inner cylinder 31 of the telescopic arm 30, a bracket 40 attached to the bracket 38 so as to be movable up and down around a pin 39, and the brackets 38 and 40. A link mechanism 75;
It comprises a hydraulic cylinder 41 for swinging up and down mounted between the link mechanism 75 and the inner cylinder 31.

As shown in FIGS. 1, 2 and 3, the left and right swinging device 36 includes a bracket 43 mounted on a bracket 40 so as to be able to swing left and right about a pin 42, and the brackets 40 and 43. The bracket 43 swings left and right by extending one of the left and right swing cylinders 44 and 45 and simultaneously contracting the other of the left and right swing cylinders 44 and 45. is there.

As shown in FIG. 1, the turning device 37 includes an outer ring 46 attached to a bracket 43 of the left and right swinging device 36.
An inner ring 47 that is rotatably mounted on the inner periphery of the outer ring 46 and has an internal gear, a hydraulic motor 48 for rotation mounted on the bracket 43, and an output shaft of the rotation motor 48. It comprises a pinion 49 meshing with the internal gear and a turning frame 50 fixed to the inner ring 47.

As shown in FIGS. 1, 2 and 3, the gripping device 34 includes side plates 51 fixedly attached to both sides of the revolving frame 50, fixed claws 52 respectively attached to lower portions of the side plates 51, The movable pawl 54 is attached to the top of each side plate 51 via a parallel link mechanism 53 and a hydraulic cylinder 62 for opening and closing the movable pawl 54. The side plate 5
1, the fixed claw 52, the parallel link mechanism 53, the movable claw 54, and the opening / closing hydraulic cylinder 62 are provided as a set as shown in FIG. The parallel link mechanism 53 includes links 57 and 58 rotatably attached to the side plates 51 by pins 55 and 56, respectively.
A movable pawl 54 and a bracket 61 which is integrated with the movable claw 54;
The line connecting 9, 60 forms a parallelogram. The opening / closing hydraulic cylinder 62 is provided between the extending portion of the link 57 extending rearward and the turning frame 50.

Attachments 1 and 2 each having a block having a concave portion are attached to the fixed claw 52 and the movable claw 54 of the gripping device 34 shown in FIG. Here, the attachment 2 is attached to the pedestal 3,
The pedestal 3 has a plurality of through holes 3a as shown in FIG. As shown in FIG. 5, a plurality of bolt holes 54a are formed in the gripping surface of the movable claw 54, and the pedestal 3 is fixed to the movable claw 54 by bolts (not shown). Also,
By displacing the corresponding positions of the through hole 3a of the pedestal 3 and the bolt hole 54a of the movable claw 54, the pedestal 3 is
Can be fixed at different positions in the front-rear direction on the grip surface. The attachment 1 is directly fixed to the fixing claw 52 by a bolt (not shown) without passing through the pedestal 3.

As described above, the fixed claw 52 and the movable claw 54
By providing attachments 1 and 2 respectively to
Even in the case of the I-shaped steel 10 in which the length of the web L between the ribs is relatively large and the two ribs cannot be completely gripped only by the fixed claw 52 and the movable claw 54, as shown in FIG. By engaging one of the ribs with the concave portions of the attachments 1 and 2 and holding the same, the ribs can be fixed to the fixed claw 52 and the movable claw 54. Therefore, the I-shaped steel 10 having a large distance between the ribs can be stably gripped by the fixed claw 52 and the movable claw 54, whereby the gripped I-shaped steel 10 does not drop and the work can be safely performed. It can be performed.

The position of the attachment 2 is changed by changing the mounting position of the pedestal 3 for the following reason. That is, since the length L1 of the rib of the I-shaped steel 10 gripped by the gripping device (see FIG. 6) varies depending on the size of the I-shaped steel 10, when the I-shaped steel 10 having a different size is gripped, the movable claw 54 is moved. It is necessary to change the gripping interval. However, since the movable claw 54 is moved by the parallel link mechanism 53, the gripping surface of the movable claw 54 maintains a state parallel to the gripping surface of the fixed claw 52. Therefore, when the movable claw 54 is moved, the vertical positional relationship between the attachments 1 and 2, which have the corresponding positional relationship in the vertical direction, is shifted, and it becomes impossible to hold the rib vertically to grip the I-shaped steel 10. I will. Therefore, by changing the position of the movable claw 54 of the pedestal 3 on the gripping surface to change the position of the attachment 2,
Even if the distance between the fixed claw 52 and the movable claw 54 changes, the vertical positional relationship between the attachments 1 and 2 can be matched. Thereby, even if the size of the I-shaped steel 10 is different, the attachment 2 is changed according to the size.
Is moved, the I-beam 10 can be stably gripped.

For example, as shown in FIG. 7A, a case where the I-shaped steel 10 having a rib height H of 300 mm is gripped,
I-section steel 1 having a rib height H of 400 mm as shown in FIG.
Compared with the case of gripping 0, when gripping the I-shaped steel 10 of 400 mm, the attachment 2 is moved backward, the distance between the fixed claw 52 and the movable claw 54 is increased, and the distance between the attachment 1 and the attachment 2 is increased. I-shaped steels 1 of different sizes so that their vertical positional relationships correspond to each other
0 can be stably held.

Next, a second embodiment of the present invention will be described. FIG. 8 is a view showing a movable claw portion of the gripping device according to the second embodiment of the present invention. As shown in FIG. 8, in the gripping device according to the second embodiment of the present invention, the attachment 2 is connected to the cylinder mechanism 11, and the attachment 2 moves on the gripping surface of the movable claw 54 by the cylinder mechanism 11. It is possible to reciprocate continuously in the direction of arrow A. Thus, the attachment 2 is moved by the cylinder mechanism 11 along the gripping surface of the movable claw 54 by the arrow A.
By making it possible to reciprocate continuously in the direction, it is possible to grip a mold steel having an arbitrary rib length.

Next, a third embodiment of the present invention will be described. FIG. 9 is a view showing a movable claw portion of the gripping device according to the third embodiment of the present invention. As shown in FIG. 9, in the gripping device according to the third embodiment of the present invention, rails 15 are provided on both edges of the gripping surface of the movable claw 54, and the pedestal 3 of the attachment 2 can slide with the rails 15. And the pedestal 3 is moved on the gripping surface of the movable claw 54. In this case, the pedestal 3 is fixed by pressing the bolt 16 against the surface of the movable claw 54. Alternatively, a bolt may be screwed in from the side surface of the rail 15 to fix the side surface of the pedestal 3 so as to press it. Thus, rail 1
By making the pedestal 3 of the attachment 2 slidable by 5, the attachment 2 can be easily moved, and the operation for adjusting the position of the attachment 2 can be easily performed.

In the second and third embodiments, the attachment 2 can be continuously moved. However, since the size of the steel bar is determined to some extent by the standard, the present invention shown in FIG. A plurality of bolt holes 54a are formed in the gripping surface of the movable claw 54 as in the fourth embodiment.
The position of the pedestal 3 to which the attachment 2 is attached is moved according to the size of the mold steel 10, and the attachment 1,
The pedestal 3 may be fixed on the gripping surface of the movable claw 54 with a bolt so that 2 has a positional relationship corresponding to the size of the I-shaped steel 10.

Further, in the above embodiment, the attachment 2 provided on the movable claw 54 is movable, but the attachment 1 provided on the fixed claw 52 may be movable. The fixed claw 52 and the movable claw 5
Both of the attachments 1 and 2 provided at 4 may be movable. In the present embodiment, the fixed claw 5
Although 2 is inserted into the side plate 51 and connected by a pin, the pin connection point can be changed to extend and contract the fixed claw 52.

In the above embodiment, the attachment 2 is movable in the front-rear direction of the movable claw 54. However, when a plurality of types of steel are not used, the fixed claw 51 or the movable claw 54 is gripped. The attachments 1 and 2 may be fixed to the surface by welding or the like.

In the correspondence between the above-described embodiments and the claims, the fixed claws 52 and the movable claws 54 serve as holding members, the parallel link mechanism 53 and the opening / closing hydraulic cylinder 62 serve as driving means, and the attachments 1 and 2 serve as fixing members. , The cylinder mechanism 11, the bolt hole 54a, the rail 15 and the bolt 16 constitute a moving means.

[0028]

According to the gripping device of the present invention, a fixing member composed of a block having a concave portion for fixing a desired shape steel is provided on the gripping surface of the gripping member. Even if they do not fit, the steel mold is fixed by the fixing member. Further, even when the type of the mold steel is changed, a desired mold steel is fixed by the fixing member by selecting a fixing member having a different shape of the concave portion. Therefore, the desired die steel can be stably gripped by the gripping member, thereby preventing the die steel from dropping from the gripping member, thereby improving the safety of work.

According to the gripping device of the second aspect, the fixing member can be moved on the gripping surface, so that the position of the fixing member can be changed according to the size of the mold steel, and thereby, Various sizes of steel molds can be stably gripped.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a gripping device according to the present invention.

FIG. 2 is a side view showing an embodiment of an erection demolition machine to which the gripping device according to the present invention is applied;

FIG. 3 is a plan view of the construction demolition machine of FIG. 2;

FIG. 4 is a plan view showing a configuration of an attachment and a base.

FIG. 5 is a plan view of a gripping surface of a movable claw.

FIG. 6 is a side view showing a state where the I-shaped steel is gripped by the gripping device of the present invention.

FIG. 7 is a side view showing a state in which I-shaped steels having different sizes are gripped.

FIG. 8 is a side view showing a gripping device according to a second embodiment of the present invention.

FIG. 9 is a perspective view showing a gripping device according to a third embodiment of the present invention.

FIG. 10 is a plan view showing a state where a plurality of bolt holes are formed in a gripping surface of a movable claw.

[Explanation of symbols]

 Reference numerals 1 and 2 Attachment 3 Pedestal 3a Through hole 10 I-shaped steel 11 Cylinder mechanism 15 Rail 16 Bolt 20 Lower traveling body 21 Revolving device 22 Upper revolving body 23 Main body 23C Operator's cab 25 Mast 25a Inner cylinder 25b Outer cylinder 25c Mast hydraulic cylinder 29 Elevating cylinder 30 Telescopic arm 31 Inner cylinder 32 Outer cylinder 34 Gripping device 35 Vertical oscillating device 36 Left and right oscillating device 37 Swivel device 41 Hydraulic cylinder for vertical oscillating 44, 45 Left and right oscillating cylinder 52 Fixed claw 54 Movable claw 62 Opening / closing cylinder 75 Link mechanism

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiyuki Takasaka 2-6-1, Otemachi, Chiyoda-ku, Tokyo Inside Hitachi Construction Machinery Co., Ltd. (72) Akio Iwasaki 2-5-2, Otemachi, Chiyoda-ku, Tokyo No. Hitachi Construction Machinery Co., Ltd. (72) Inventor Seiichi Someno 2-6-1 Otemachi, Chiyoda-ku, Tokyo Hitachi Construction Machinery Co., Ltd. (56) References JP-A-7-309576 (JP, A) Hei 4-107777 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B66C 1 / 42,1 / 64

Claims (2)

(57) [Claims] A gripping member comprising a fixed pawl and the movable pawl with a 1. A type steel mutually parallel gripping surface for clamping a flat
A driving device for driving the movable claw while maintaining the gripping surfaces of the gripping members parallel to each other by a row link mechanism , wherein the gripping surface holds the shaped steel having a predetermined shape on each gripping surface. A holding device for a mold steel, wherein a fixing member comprising a block having a concave portion for fixing to a surface is provided. 2. The apparatus according to claim 1, further comprising moving means for moving at least one of the fixing members along the holding surface in the front-rear direction of the holding surface.