JP6719822B2 - Mounting structure for loads - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a load, and more particularly to a mounting structure for mounting a mount on a pedestal provided in a construction machine.

2. Description of the Related Art Conventionally, there are some construction machines in which a platform is provided at the rear end of an upper revolving structure rotatably provided above a lower traveling structure, and a mounting object such as a counterweight or a generator is mounted on the platform. Some have a mounting structure for mounting a mounted object at a predetermined position.

When a stacking type counterweight is attached as a mounting object, the positioning pin is inserted into the through hole of the first weight, the first weight is lifted and moved above the base weight, and the tip end of the positioning pin is moved to the base weight. The through hole formed in the first weight and the through hole of the first weight and the through hole of the base weight are aligned with each other, the alignment pin is pulled out, and the connecting bolt extends between the aligned through hole and the through hole. In some cases, a nut is inserted and attached by screwing (see, for example, Patent Document 1).

JP-A-2000-219486

However, in the mounting structure of the above-mentioned patent document 1, it was difficult to insert the positioning pin protruding from the load hung by the crane into the through hole because it was difficult to visually recognize. Further, by using the alignment pin, once the placement object is aligned, the alignment pin is pulled out, and the connecting bolt is inserted and attached across the aligned through hole and through hole, so that It took a lot of time to attach the mount.

Therefore, an object of the present invention is to provide a mounting structure for mounting a mounted object on a pedestal provided on a construction machine, in which the loaded object is easily positioned.

In order to achieve the above-mentioned object, a load mounting structure of the present invention is a mounting structure for mounting a mounting object on a mount provided in a construction machine, wherein a guide tube having a bolt insertion hole therein, and the mount. A guide tube mounting hole that is formed on the upper end of the guide tube and a guide tube mounting hole that is inserted through the guide tube in the vertical direction to be mounted; A cover cap and a connecting bolt that connects the above-described object and the gantry are provided, and the guide tube has a lower end side projecting downward from the guide tube mounting hole, and a lower end side outer peripheral surface on a lower surface of the gantry. While welding, a nut is welded to the lower surface of the guide cylinder, the cap has a top plate having a through hole for inserting the connecting bolt, a cylindrical portion covering the outer peripheral portion of the guide cylinder, and the guide cylinder inserting hole. The guide cylinder is inserted into the guide cylinder, and the cap is attached to the guide cylinder. With a cap attached to the guide cylinder, a shaft portion inserted into the through hole and the bolt insertion hole, and a male screw formed at the tip of the shaft portion and screwed into the nut. It is characterized by having a section and.

Further, it is preferable that the guide tube projects upward from an upper end portion of the guide tube insertion hole in a state where the guide tube is inserted into the guide tube insertion hole.

Furthermore, the guide tube insertion hole is formed to have a diameter larger than the outer diameter of the tubular portion of the cap, and the guide tube is inserted into the guide tube insertion hole and the cap is attached to the guide tube. It is preferable that the tubular portion of the cap is disposed between the inside of the guide tube insertion hole and the outer peripheral portion of the guide tube.

According to the load mounting structure of the present invention, by using the guide tube, it is possible to align the pedestal and the object without using the alignment pins as in the conventional case, and to mount the object only by fastening the connecting bolt. Since the ornament can be attached to the gantry, it is possible to reduce costs and improve workability.

In addition, the guide tube protruding from the top surface of the gantry is easy to see from the outside, and the guide tube can be satisfactorily inserted into the guide tube insertion hole of the load hung by the crane, which facilitates the positioning of the placed object. Can be done. Further, when the guide tube is inserted into the guide tube insertion hole and the cap is attached to the guide tube, the abutment portion of the cap comes into contact with the upper surface of the mounted object and the connecting bolt is fastened, whereby the abutment portion is Since the placing object is pressed against the gantry side and brought into close contact with the pedestal via the, the placing object can be attached on the gantry without rattling. Further, in the guide tube, the nut to which the connecting bolt is screwed is welded to the lower surface, and it is not necessary to form the female screw in the bolt insertion hole, so that the cost can be reduced.

Further, when the guide tube is inserted into the guide tube insertion hole, the guide tube projects upward from the upper end portion of the guide tube insertion hole, so that the cap can be easily put on the guide tube and the connecting bolt The fastening work can be performed well. In addition, the guide tube insertion hole is formed to have a diameter larger than the outer diameter of the cap, the guide tube is inserted through the guide tube insertion hole, and the tubular part of the cap is inserted through the guide tube while the cap is attached to the guide tube. Since it is arranged between the inside of the hole and the outer peripheral portion of the guide cylinder, the height of the guide cylinder and the length of the connecting bolt can be kept short.

It is a principal part exploded sectional view which shows the attachment structure of the expansion floor which shows the 1st example of this invention. Similarly, it is a top view of the state which attached the extension floor to the mount. Similarly, it is a side view in the state which attached the extension floor to the mount. Similarly, it is a front view in the state which attached the extension floor to the mount. FIG. 3 is an enlarged cross-sectional view of a main part of the mounting structure similarly. Similarly, it is a front view of a pile driver. It is an important section expanded sectional view of an attachment structure showing the example of the 2nd form of the present invention.

1 to 6 show a first embodiment in which the present invention is applied to an extension floor attached to a mount of a pile driver. As shown in FIG. 6, the base machine 12 of the pile driving machine 11 includes an upper revolving structure 14 rotatably provided on the upper part of a lower traveling structure 13 having a crawler 13a via a revolving bearing and an upper revolving structure. A reader bracket 16 to which a reader 15 is attached is provided at the front of 14, and a pedestal 18 on which a generator 17 is mounted is provided at the rear of the upper swing body 14. Further, since the large generator 17 is mounted on the pedestal 18, the extension floors 19 and 19 are attached to both sides in the vehicle width direction.

The gantry 18 is formed by attaching a gantry frame 18b to an upper portion of an outer frame 18a, and is attached to a rear end portion of the upper revolving structure 14 via a pair of connecting arms 20 and 20. The gantry frame 18b is composed of an upper plate 18c, a lower plate 18d, and downward grooved steel 18e that connects them, and the lower plate 18d is more than the upper plate 18c in the vehicle width direction on both sides of the gantry frame 18b. The groove-shaped steel 18e and the upper plate 18c are connected to each other in a stepwise manner so as to project outward in the width direction. Guide tube mounting holes 18f are formed at the four corners of the lower plate 18d protruding outward, and the extension floors 19 and 19 are mounted via the guide cylinders 21 mounted in the guide tube mounting holes 18f, respectively.

The guide cylinder 21 is provided with a bolt insertion hole 21a therein, the lower end side is made to project below the guide cylinder mounting hole 18f, and the lower end side outer peripheral surface is welded to the lower surface of the lower plate 18d, and at the same time the lower surface of the guide cylinder 21 is Has a nut 22 welded thereto.

A floor plate 19b is attached to an upper portion of an outer frame 19a of each extension floor 19, and a side portion of the floor plate 19b on the gantry connection side is formed so as to project outward of the outer frame 19a in the vehicle width direction. At a position corresponding to the guide cylinder 21 of the floor plate 19b protruding from the outer frame 19a, the upward grooved steel 19c is attached to the lower surface and the disc member 19d is attached to the upper surface, respectively. The disc member 19d, the floor plate 19b, and the groove. A guide tube insertion hole 19e penetrating in the vertical direction is formed across the shaped steel 19c. Further, the length dimension of the projecting portion of the guide barrel 21 projecting upward from the guide barrel mounting hole 18f is formed longer than the length dimension from the bottom surface of the channel steel 19c to the top surface of the disc member 19d.

A cap 23 is attached to an upper portion of the guide cylinder 21 that is inserted through the guide cylinder insertion hole 19e of the extension floor 19 into the guide cylinder 21 and projects from the upper surface of the disc member 19d. The cap 23 has a top plate 23b having a through hole 23a for inserting the connecting bolt 24 in the center, a cylindrical portion 23c for covering the outer peripheral portion of the guide cylinder 21, and an abutting portion for abutting on the upper surface of the disc member 19d. 23d.

The connecting bolt 24 is inserted into the guide cylinder 21 through the guide cylinder insertion hole 19e, and the cap 23 is attached to the guide cylinder 21, and the through hole 23a formed in the cap 23 and the bolt insertion hole 21a formed in the guide cylinder 21. It has a shaft portion 24a which is inserted into the, a male screw portion 24b which is screwed into the nut 22, and a head portion 24c.

As described above, in the present embodiment, the guide tube mounting hole 18f provided in the gantry 18, the guide tube 21 attached to the guide tube mounting hole 18f and having the nut 22 at the lower end, and the guide tube mounting hole 18f are provided in the extension floor 19. The guide cylinder insertion hole 19e, the cap 23, and the connecting bolt 24 constitute an attachment structure for attaching the extension floor 19 to the pedestal 18. Further, the upper plate 18c of the gantry frame 18b is provided with three connecting fittings 25 for positioning and mounting the generator 17, and handrails 26 and ladders 27 are appropriately provided on the outer sides of the gantry 18 and the extension floors 19 and 19. It is provided.

When attaching the above-mentioned extension floor 19 to the gantry 18, first, the extension floor 19 is hoisted by a crane, and the guide tube 21 is attached to the guide tube 21 by aligning the positions of the guide tube attachment holes 19f with the positions of the guide tubes 21. The holes 19f are respectively inserted.

Next, the cap 23 is covered on the upper portion of the guide cylinder 21 protruding from the guide cylinder mounting hole 19f, and the shaft portion 24a of the connecting bolt 24 is formed with the through hole 23a formed in the cap 23 and the bolt insertion hole 21a formed in the guide cylinder 21. And the male screw portion 24b is screwed onto the nut 22. As a result, the connection side end of the floor plate 19b of the expanded floor 19 is placed on the upper portion of the channel steel 18e of the gantry frame 18b, and the outer frame 19a of the expanded floor 19 is placed outside the outer frame 18a of the gantry 18. It is arranged and the extension floor 19 is attached to the gantry 18.

In the present embodiment, the pedestal 18 and the extension floor 19 can be aligned without using alignment pins as in the conventional case, and the extension floor 19 can be attached to the pedestal 18 simply by fastening the connecting bolts 24. It is possible to reduce costs and improve workability. Further, the guide cylinder 21 protruding from the pedestal 18 is easily visible from the outside, and the guide cylinder insertion hole 19e of the extension floor 19 hung by the crane can be easily inserted into the guide cylinder 21.

Further, when inserting the guide tube insertion hole 19e into the guide tube 21, the guide tube 21 projects upward from the upper end portion of the guide tube insertion hole 19e, so that the cap 23 is easily covered on the upper part of the guide tube 21. In addition, the fastening work of the connecting bolts 24 can be performed well. Further, when the connecting bolt 24 is screwed into the nut 22, the contact portion 23d of the cap 23 presses the channel steel 18e of the expanded floor 19 toward the lower plate 18d of the gantry frame 18b via the disc member 19d. Therefore, the extension floor 19 can be attached to the mount 18 without rattling. Further, in the present embodiment, the guide cylinder 21 does not need to weld the nut 22 to which the connecting bolt 24 is screwed to the lower surface and form the female screw in the bolt insertion hole 21a, so that the cost can be reduced. it can.

FIG. 7 shows a second embodiment of the present invention, and the same components as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

The guide tube insertion hole 19f provided in the expanded floor 19 of this embodiment is formed to have a diameter larger than the outer diameter of the cap 23. Further, in a state in which the guide tube mounting hole 18f is inserted into the guide tube 21 and the cap 23 is covered on the upper part of the guide tube 21, the tubular portion 23c of the cap 23 has a tubular portion 23c inside the guide tube insertion hole 19f and the guide tube 21. The lower surface of the top plate 23b of the cap 23, which is disposed between the outer peripheral portion and the outer peripheral portion, serves as an abutting portion 23e and abuts on the floor plate 19b of the extension floor 19. Since the present embodiment is formed as described above, the height of the guide cylinder 21 and the length of the connecting bolt 24 can be suppressed to be short.

It should be noted that the present invention is not limited to the one in which the placed object is the extended floor as in the above-described embodiments, and the placed object may be a counterweight, a generator, or a hydraulic unit.

11... Pile driver, 12... Base machine, 13... Lower traveling body, 13a... Crawler, 14... Upper revolving body, 15... Leader, 16... Leader bracket, 17... Generator, 18... Stand, 18a... Outer frame, 18b... Frame frame, 18c... Upper plate, 18d... Lower plate, 18e... Channel steel, 18f... Guide tube mounting hole, 19... Extended floor, 19a... Outer frame, 19b... Floor plate, 19c... Channel steel, 19d... Disc member, 19e, 19f... Guide tube insertion hole, 20... Connection arm, 21... Guide tube, 21a... Bolt insertion hole, 22... Nut, 23... Cap, 23a... Through hole, 23b... Top plate, 23c... Tube Shaped parts, 23d, 23e... Abutting part, 24... Connecting bolt, 24a... Shaft part, 24b... Male screw part, 24c... Head part, 25... Connecting metal fitting, 26... Handrail, 27... Ladder

Claims (3)

In a mounting structure for mounting a mounting object on a mount provided in a construction machine, a guide cylinder having a bolt insertion hole inside and a guide cylinder for mounting the guide cylinder formed on the mount in a vertical direction. A mounting hole, a guide tube insertion hole that is formed in the object described above and penetrates the guide tube in the up-down direction, a cap that covers the upper portion of the guide tube, and a connecting bolt that connects the object and the frame. Equipped with
The guide cylinder has a lower end protruding downward from the guide cylinder mounting hole, and an outer peripheral surface of the lower end is welded to a lower surface of the gantry and a nut is welded to a lower surface of the guide cylinder.
The cap has a top plate having a through hole, a tubular portion that covers an outer peripheral portion of the guide tube, the guide tube inserted into the guide tube insertion hole, and the cap is attached to the guide tube. A contact portion that contacts the upper surface of the above-mentioned figurine,
The connecting bolt has a shaft portion that is inserted into the through hole and the bolt insertion hole in a state where the guide cylinder is inserted into the guide cylinder insertion hole and the cap is attached to the guide cylinder. A mounting structure for a load, comprising a male screw portion formed at a tip of the portion and screwed into the nut. The loading structure according to claim 1, wherein the guide cylinder projects upward from an upper end portion of the guide cylinder insertion hole in a state where the guide cylinder is inserted into the guide cylinder insertion hole. The guide tube insertion hole is formed to have a larger diameter than the outer diameter of the tubular portion of the cap, the guide tube is inserted through the guide tube insertion hole, and the cap is attached to the guide tube. The load mounting structure according to claim 1, wherein the tubular portion of the cap is disposed between an inner side of the guide tube insertion hole and an outer peripheral portion of the guide tube.

Images