JP7251972B2 - crane - Google Patents

Description

The present invention relates to cranes .

Conventionally, a clamping device has been used that grips the open end of a cylindrical body such as a steel pipe pile. Upper equipment such as a pile press-in device and a crane is mounted and supported on the clamp device.
As described in Patent Literature 1, Patent Literature 2, etc., there is a configuration having a pair of clamping mechanisms for clamping opposite side walls of the open end portion of the cylinder as a clamping device. Patent document 2 also proposes a configuration in which two pairs of holding mechanisms are arranged in a cross shape.

Japanese Utility Model Laid-Open No. 6-40038 Japanese Patent No. 5176116

However, while one pair of clamping mechanisms for one cylindrical body may lack fixing force and stability, two pairs of clamping mechanisms are disadvantageous in terms of complication, weight increase, cost increase, and the like.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems in the prior art, and it is an object of the present invention to improve the fixing force and stability of a clamp device that grips the open end of a cylindrical body, and to simplify the weight of the device. do.

A rear clamping device and a front clamping device for gripping the opening ends of two cylindrical bodies arranged substantially parallel to each other in the axial direction to solve the above-mentioned problems. and,
a slide base provided on the rear clamp device and capable of moving back and forth relative to the rear clamp device,
the front clamp device is attached to the slide base in front of the rear clamp device and below the slide base;
The two cylinders are buried in the ground, and the open ends of the two cylinders protrude above the ground,
each of the posterior clamping device and the anterior clamping device comprising:
a first clamping mechanism that clamps the side wall of the opening end portion from the inside and the outside;
a second clamping mechanism that clamps the side wall of the opening end from the inside and the outside;
a contact member connected and fixed to the first clamping mechanism and the second clamping mechanism, and for stabilizing the posture by contacting the end surface of the opening end without sandwiching the side wall of the opening end from inside and outside; ,
with
In each of the rear clamping device and the front clamping device,
As a pinching mechanism that pinches and pinches the side wall of the opening end from the inside and outside, the second pinching mechanism is arranged next to the first pinching mechanism along the circumference of the opening end in one direction,
The first clamping mechanism, the contact member, and the second clamping mechanism are arranged in the order of the first clamping mechanism, the contact member, and the second clamping mechanism along the one direction,
The contact member is a crane provided at a position substantially equidistant from the first clamping mechanism and the second clamping mechanism.

In the invention according to claim 2, the rear clamping device and the front clamping device are connected and fixed to the first clamping mechanism and the second clamping mechanism, respectively , and the side walls of the open end are clamped from inside and outside. A second abutting member that abuts against the end face of the opening end without pinching to stabilize the posture,
Each of the rear clamping device and the front clamping device includes only the first clamping mechanism and the second clamping mechanism as clamping mechanisms that clamp the side wall of the open end from the inside and the outside,
In each of the rear clamping device and the front clamping device,
The first clamping mechanism, the contact member, the second clamping mechanism, and the second contact member follow the circumference of the open end in the one direction, and the first clamping mechanism, the contact member, The second clamping mechanism and the second contact member are arranged in this order,
The contact member is provided between the first clamping mechanism and the second clamping mechanism along the circumference of the open end in the one direction, and the second contact member is located at the open end. 2. The crane according to claim 1, which is provided between the second clamping mechanism and the first clamping mechanism along the circumference of the one direction.

In the invention according to claim 3 , in each of the rear clamping device and the front clamping device, the first clamping mechanism, the contact member, the second clamping mechanism, and the second contact member are arranged at the center of the cylindrical body. 3. A crane according to claim 2, arranged at approximately 90 degree intervals around the axis.

According to a fourth aspect of the invention, in each of the rear clamping device and the front clamping device, the abutting member has a drop-off prevention claw arranged outside the open end. It is a crane according to any one of them.

In the invention according to claim 5, in each of the rear clamping device and the front clamping device, the first clamping mechanism, the second clamping mechanism and the contact member are located at positions corresponding to the radial direction of the open end. 5. The crane according to any one of claims 1 to 4, wherein .

The invention according to claim 7,
6. The crane according to any one of claims 1 to 5, wherein each of said rear clamp device and said front clamp device comprises a mechanism that rotates around an axis extending in the vertical direction of the crane.

According to the present invention, in the clamping device that grips the open end of the cylindrical body, the fixing force and stability are improved by disposing the abutting member that abuts against the end surface of the open end to stabilize the posture. It is possible to reduce the weight and simplify the structure as compared with the case of increasing the clamping mechanism.

1 is a side view of a crane according to one embodiment of the invention; FIG. 1 is a plan view of a clamping portion of a crane according to one embodiment of the invention; FIG. It is a figure of the horizontal direction which shows the principal part of the clamp apparatus which concerns on one Embodiment of this invention. 1 is an exploded view (top view) of a clamping device according to an embodiment of the present invention; FIG. 1 is an exploded view (horizontal direction view) of a clamp device according to an embodiment of the present invention; FIG. 1 is an exploded view (front-rear direction view) of a clamp device according to an embodiment of the present invention; FIG. FIG. 5 is a schematic plan view of a clamp portion of a crane according to another embodiment of the present invention;

An embodiment of the present invention will be described below with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

The clamping device, the coupling of the clamping device and the crane will now be described with reference to FIGS. 1 to 6. FIG.
As shown in FIG. 1, the crane 100 includes a coupling body of a front clamping device 10F and a rear clamping device 10R. The crane 100 performs lifting work by holding and fixing the opening ends of the cylinders P, P with the front clamping device 10F and the rear clamping device 10R, respectively. In the drawing, the front-rear direction of the crane 100 is defined as the X-axis, the left-right direction as the Y-axis, and the vertical direction as the Z-axis.

The crane 100 includes a front clamping device 10F, a rear clamping device 10R, a saddle (base) 51, a slide base 52, a lifting device 53, a boom 54 rotatably mounted on the slide base 52, a hook ( not shown).
The rear clamp device 10R is provided below the saddle 51. As shown in FIG. The rear clamp device 10R is connected to the saddle 51 via a mechanism that rotates around the Z axis.
The slide base 52 is provided on the saddle 51 so as to be movable forward and backward.
The lifting device 53 is connected to and supported by the slide base 52 and lifts and lowers the front clamp device 10F fixed to the lower end. The front clamping device 10F is also connected to the lifting device 53 via a mechanism that rotates around the Z axis.
The forward/backward movement function of the slide base 52 can be used to match the center-to-center distance between the front clamp device 10F and the rear clamp device 10R to the center-to-center distance between the cylindrical bodies P (pile pitch PZ-PZ).

The cylinders held by the front clamping device 10F and the rear clamping device 10R of the crane 100 are two cylinders P, P which are aligned with the direction of the axis PZ substantially parallel. The cylindrical bodies P, P are cylindrical piles such as steel pipe piles, are buried in the ground, and have upper open ends protruding above the ground as shown in FIG. It is gripped with 10R.
As shown in FIG. 2, the cylindrical bodies P, P are constructed with an interval therebetween. A pair of water stop piles C, C are arranged on the left and right between the adjacent cylinders P, P. Pile P (P3 . columns are configured. The water stop pile C closes the space between the cylindrical bodies P and P, and the row of piles of the cylindrical body P and the water stop pile C constitutes a water stop wall.

As shown in FIG. 2 and the like, the front clamping device 10F and the rear clamping device 10R have the same configuration, so they will be referred to as the clamping device 10 when not distinguished.
4 to 6 show exploded views of the clamping device 10. FIG.
The clamp device 10 includes a first clamping mechanism 11, a second clamping mechanism 12, two contact members 13 and 14, and a cross-shaped frame 15. As shown in FIG.
As shown in FIG. 5, each of the first clamping mechanism 11 and the second clamping mechanism 12 includes a fixed claw a1, a movable claw a2 opposed to the fixed claw a1, a cylinder device a3 for operating the movable claw a2, and a fixed claw a1. and a frame a4 for connecting and fixing the cylinder device a3.
As shown in FIGS. 3 and 5, the first holding mechanism 11 and the second holding mechanism 12 hold the side wall SW of the opening end of the cylindrical body P from the inside and the outside with the fixed claw a1 and the movable claw a2. It is a mechanism for sandwiching.

Each of the contact members 13 and 14 is integrally connected and fixed to the first clamping mechanism 11 and the second clamping mechanism 12 via the frame 15 . As shown in FIGS. 2 and 4, the first clamping mechanism 11, the contact member 13, the second clamping mechanism 12, and the contact member 14 are arranged in this order at the four ends of the frame 15 configured in a cross shape. It is The first clamping mechanism 11 and the second clamping mechanism 12 are arranged at positions facing each other in the left-right direction Y. As shown in FIG. The abutting member 13 and the abutting member 14 are arranged at positions opposed to each other in the front-rear direction X. As shown in FIG. The angles around the Z-direction axis passing through the center 15a of the frame 15 shown in FIG. The angle between the clamping mechanism 12 and the contact member 14 and between the contact member 14 and the first clamping mechanism 11 are approximately 90 degrees.

Left and right side walls SW of the tubular body P are gripped by the first gripping mechanism 11 and the second gripping mechanism 12 . As shown in FIG. 1, the abutment members 13 and 14 abut on the end face of the open end of the cylindrical body P to stabilize the posture. The contact members 13 and 14 have drop-off prevention claws 13a and 14a arranged outside the opening end of the cylindrical body P. As shown in FIG.

The clamping mechanism for sandwiching and clamping the side wall SW at the open end of the cylindrical body P from the inside and the outside is as follows along the circumference of the open end of the cylindrical body P in one direction. For example, as shown in FIG. 2, the second clamping mechanism 12 is arranged next to the first clamping mechanism 11 following the clockwise direction CW from the first clamping mechanism 11 .
The clamping device 10 of this embodiment includes only the first clamping mechanism 11 and the second clamping mechanism 12 as clamping mechanisms that clamp the side wall of the open end of the cylindrical body P from the inside and the outside.
Therefore, as shown in FIG. 2, the second clamping mechanism 12 is arranged next to the first clamping mechanism 11 along the counterclockwise CCW from the first clamping mechanism 11 .

With respect to the arrangement relationship between the first holding mechanism 11 and the second holding mechanism 12 as described above, the contact members 13 and 14 are arranged as follows.
As shown in FIG. 2, the first clamping mechanism 11, the contact member 14, and the second clamping mechanism 12 are arranged in this order from the first clamping mechanism 11 clockwise CW.
Further, in this embodiment, the same is true for reverse rotation. That is, as shown in FIG. 2, the first clamping mechanism 11, the contact member 13, and the second clamping mechanism 12 are arranged in this order from the first clamping mechanism 11 to the counterclockwise CCW.
In addition, although the description has been changed, the contact members (13, 14) follow the circumference of the open end of the cylindrical body P in one direction (for example, CW) to form the first clamping mechanism 11 and the second clamping mechanism 12. and between the second clamping mechanism 12 and the first clamping mechanism 11, respectively.

Regardless of this embodiment, the contact member may be installed only between the first clamping mechanism 11 and the second clamping mechanism 12 on one side.
For example, as shown in FIG. 7, the first clamping mechanism 11, the second clamping mechanism 12, and the contact member 13 are arranged in this order with a relative angle of 120 degrees around the Z central axis (15a). configuration may be implemented. In this case, as shown in FIG. 7, in the front clamping device 10F, the first clamping mechanism 11 and the second clamping mechanism 12 are arranged so as to be distributed to the left and right in front of the contact member 13, and in the rear clamping device 10R, It is preferable that the first clamping mechanism 11 and the second clamping mechanism 12 are arranged behind the contact member 13 so as to be distributed to the left and right. Thereby, the crane 100 can be stably supported.

As described above and as shown in the drawings, the abutment members (13, 14) are provided at positions substantially equidistant from the first clamping mechanism 11 and the second clamping mechanism 12. As shown in FIG. This is for stabilizing the support.

Moreover, regardless of the present embodiment, a clamping device may be provided with three or more clamping mechanisms that clamp the side wall SW at the open end of the cylindrical body P from the inside and the outside.
In that case, when arbitrary two clamping mechanisms among the three or more clamping mechanisms are regarded as the first clamping mechanism 11 and the second clamping mechanism 12, the abutting members are arranged so as to satisfy the conditions described above. By installing it between them, the fixing force and stability can be improved. That is, compared with the case where there is no contact member between the first clamping mechanism 11 and the second clamping mechanism 12, the fixing force and stability can be improved.
In this way, the weight and simplification can be achieved as compared with the case of increasing the clamping mechanism.
The conditions explained above are summarized as follows.
(Condition 1) As a clamping mechanism that sandwiches and clamps the side wall SW at the open end of the cylindrical body P from the inside and the outside, a first clamping mechanism follows the circumference of the open end of the cylindrical body P in one direction (CW or CCW). A second clamping mechanism 12 is arranged next to the mechanism 11 .
(Condition 2) In the same direction (CW when CW is selected in Condition 1, CCW when CCW is selected), the first clamping mechanism 11, the contact member (13 or 14), and the second clamping mechanism 12 be arranged in the order of

In other words, the position of the contact members 13 and 14 is not equipped with a clamping mechanism that clamps the side wall SW of the open end of the cylindrical body P from the inside and outside. .
This is because if the pinching mechanism is installed at the position of the contact member 13 (14), the condition 1 is not satisfied, and the condition 2 is not satisfied.
That is, a mere abutting member is not arranged between the two clamping mechanisms along the circumference of the cylindrical body P, and the problems of improving the fixing force and stability and reducing the weight and simplification cannot be achieved. It is from.

As described above, two cylindrical bodies P are arranged side by side and connected to each other so as to correspond to each other, and the direction in which the first clamping mechanism 11 and the second clamping mechanism 12 of the clamp devices 10F and 10R are arranged (horizontal direction Y ) is substantially orthogonal to the direction in which one clamp device and the other clamp device are arranged (the front-rear direction X).
Since the front-rear direction X is the direction in which the two cylinders P, P to be gripped are arranged side by side, even if the crane generates a moment to tilt in the front-rear direction, the supportability is high. On the other hand, in the left-right direction, the cylindrical bodies P to be gripped are not lined up (there is only one), so the supportability is low. Therefore, as the above-described arrangement configuration, it is possible to comprehensively improve the fixing force and stability even with a small number of clamping mechanisms.

As shown in the exploded views of FIGS. 4 to 6, the first clamping mechanism 11, the second clamping mechanism 12, and the contact members 13 and 14 can change their positions corresponding to the radial direction of the open end of the cylindrical body P. is provided.
As a result, as shown in FIG. 4, it is possible to deal with cylinders P having different diameters, from cylinders PL having a relatively large diameter to cylinders PS having a relatively small diameter.
The structure for providing changeably is not particularly limited. In addition, in the illustrated example, it is configured as follows.
The first clamping mechanism 11 and the second clamping mechanism 12 are fixed by pins 15c through selected attachment holes 15b provided in the frame 15 so as to line up in a direction corresponding to the radial direction of the cylinder P. As shown in FIG. Therefore, the first clamping mechanism 11 and the second clamping mechanism 12 are provided so that the position corresponding to the radial direction of the open end of the cylindrical body P can be changed by selecting the mounting hole 15b.
The abutting member 13 (14) selects the mounting female screw 13b (14b) provided on the abutting member 13 (14) in a direction corresponding to the radial direction of the cylindrical body P and attaches it with a bolt 13c (14c). Fixed. Therefore, the abutting members 13 and 14 are provided so that their positions corresponding to the radial direction of the open end of the cylindrical body P can be changed by selecting the mounting female screw 13b (14b).

As described above, according to the clamping device 10 of the present embodiment, the pair of clamping mechanisms 11 and 12 and the pair of contact members 13 and 14 for the cylindrical body P are configured to clamp the clamping portion. Although there are two positions, the abutment portion is generated between them to provide support, thereby improving the fixing force and stability, and making it possible to reduce the weight and simplification as compared with the case where the clamping mechanism is increased.

Although the figure shows a cylindrical body, it goes without saying that the present clamping device can also be applied to a cylindrical body having a cross-sectional shape such as a square tube.

10 clamping device 10F front clamping device 10R rear clamping device 11 first clamping mechanism 12 second clamping mechanism 13, 14 abutting members 13a, 14a drop prevention claw 15 frame 51 saddle 52 slide base 53 lifting device 54 boom 100 crane C water stop Pile P Cylindrical body (cylindrical pile)

Claims (6)

a rear clamping device and a front clamping device, each of which grips one open end of each of two cylindrical bodies arranged in parallel with each other in the axial direction;
a slide base provided on the rear clamp device and capable of moving back and forth relative to the rear clamp device,
the front clamp device is attached to the slide base in front of the rear clamp device and below the slide base;
The two cylinders are buried in the ground, and the open ends of the two cylinders protrude above the ground,
each of the posterior clamping device and the anterior clamping device comprising:
a first clamping mechanism that clamps the side wall of the opening end portion from the inside and the outside;
a second clamping mechanism that clamps the side wall of the opening end from the inside and the outside;
a contact member connected and fixed to the first clamping mechanism and the second clamping mechanism, and for stabilizing the posture by contacting the end surface of the opening end without sandwiching the side wall of the opening end from inside and outside; ,
with
In each of the rear clamping device and the front clamping device,
As a pinching mechanism that pinches and pinches the side wall of the opening end from the inside and outside, the second pinching mechanism is arranged next to the first pinching mechanism along the circumference of the opening end in one direction,
The first clamping mechanism, the contact member, and the second clamping mechanism are arranged in the order of the first clamping mechanism, the contact member, and the second clamping mechanism along the one direction,
The crane , wherein the contact member is provided at a position substantially equidistant from the first clamping mechanism and the second clamping mechanism. Each of the rear clamping device and the front clamping device is connected and fixed to the first clamping mechanism and the second clamping mechanism, and clamps the opening end without sandwiching the side walls of the opening end from inside and outside. A second contact member that contacts the end surface to stabilize the posture,
Each of the rear clamping device and the front clamping device includes only the first clamping mechanism and the second clamping mechanism as clamping mechanisms that clamp the side wall of the open end from the inside and the outside,
In each of the rear clamping device and the front clamping device,
The first clamping mechanism, the contact member, the second clamping mechanism, and the second contact member follow the circumference of the open end in the one direction, and the first clamping mechanism, the contact member, The second clamping mechanism and the second contact member are arranged in this order,
The contact member is provided between the first clamping mechanism and the second clamping mechanism along the circumference of the open end in the one direction, and the second contact member is located at the open end. 2. The crane according to claim 1, which is provided between said second holding mechanism and said first holding mechanism along the circumference of said one direction. In each of the rear clamping device and the front clamping device, the first clamping mechanism, the contact member, the second clamping mechanism, and the second contact member are arranged at intervals of approximately 90 degrees around the central axis of the cylinder. 3. The crane of claim 2, wherein the crane is located in 4. The crane according to any one of claims 1 to 3 , wherein in each of said rear clamping device and said front clamping device , said abutting member has a drop-off prevention claw arranged outside said open end. . In each of the rear clamping device and the front clamping device, the first clamping mechanism, the second clamping mechanism, and the contact member are provided so as to be able to change positions corresponding to the radial direction of the open end. A crane as claimed in any one of claims 1 to 4. The crane according to any one of claims 1 to 5, wherein each of said rear clamping device and said front clamping device comprises a mechanism that rotates around an axis extending in the vertical direction of the crane.

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