JPH0641981Y2 - Crane stability holding device for construction climbing crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial field of application: The present invention relates to a stable holding device when a crane part pivotally drives a mast in a construction climbing crane.

BACKGROUND ART: As is well known, a climbing crane for construction is constructed such that, after changing the lifting height, a mast is added, and then the crane part is raised along the mast to a required height and then fixed to the top part of the mast. ing.

In such a climbing crane, recently, the outer shape of the mast has been made upright by adding a cylindrical body, and the outer mast (the supporting frame of the crane part) equipped with the crane part supported by this mast is naturally a cylinder. The pins are formed into a shape and are vertically arranged at a required interval so that the pins are inserted into the locking holes provided in the mast to be locked and fixed. Further, when moving up and down along the mast, a guide roller attached to the outer mast side is brought into contact with a guide rail attached to the mast to guide the guide rail. For example, it is known from Japanese Patent Laid-Open No. 55-11401.

Problems to be Solved: Since the conventional climbing crane has such a configuration, the connection and fixation of the mast and the crane section are insufficient after the completion of the climbing operation. Therefore, when the jib is swung by suspending the material during operation, the twisting force acts on the fixed portion. In particular, a lateral load acts on the guide roller for climbing, and it is easily damaged.

For this reason, if a measure of bolting the outer mast to the mast is taken as a countermeasure, it is inconvenient because it requires a large number of steps for attaching and detaching it during the next climbing work.

Means for Solving the Problems: The present invention solves the above problems and fixes the crane part to the mast during climbing operation.
(EN) Provided is a stable holding device for a crane part which can be more surely fixed by a simple means and which can be easily released in the next work.

That is, the present invention relates to a construction crane having a climbing function, in which a locking seat piece having a vertical taper groove is provided inside an outer mast that supports the crane portion and is fitted on the mast or a frame body corresponding thereto. Are fixedly attached at a plurality of places, and a plurality of holding pieces for engaging and fixing the locking seat pieces are attached to and detached from the top of the mast by utilizing the connecting holes on the upper surface of the connecting flange portion. The holding piece is arranged so that it can be attached to the flange portion of the mast with at least two bolts, and the locking seat piece attached to the frame body by being fixed to the end of the seat plate. It consists of a wedge piece interposed between the taper groove and the outer surface of the mast, and the wedge piece of the holding piece is engaged with the taper groove of the locking seat piece and pushed along the peripheral surface of the mast to prevent twisting of the turning. With a device that is designed to be fixed That.

The locking seat piece of the present invention is a conventional outer mast as a mounting side frame body. Alternatively, between the top of the outer mast and the swivel plate, a gantry having a size that can be fitted to the mast of an appropriate height is incorporated, and the locking seat piece is attached using this gantry as a frame. This mount is used when the crane is supported on the floor separately from the outer mast.

Further, the holding piece to be attached to the mast in the present invention is provided with a screw hole on the attachment seat plate in accordance with the pitch of the bolt hole of the connecting flange surface of the mast, and a screw sleeve is screwed into the screw hole to engage the engaging piece. It is configured such that the fastening state between the holding piece and the flange portion can be kept constant regardless of the pushing amount of the wedge piece engaged with the taper groove of the stop piece.

Operation: When the stable holding device of the present invention is incorporated in a crane having a climbing function, the climbing operation of the crane part is finished, the lock pin of the climbing mechanism is inserted and fixed in the mast, and then the outer mast ( Or, attach the wedge piece attached to the holding piece attached on the connecting flange surface of the mast top to the taper groove of the locking seat piece that is attached to the side of the crane support frame, and first, of each locking seat piece. When the wedge pieces are driven into the taper groove so as to be divided, the center of the mast and the center of rotation of the crane portion are substantially aligned with each other. A screw sleeve is screwed into the screw hole provided in the mounting seat plate of each holding piece, and the screw sleeve is screwed into the mounting seat plate with the relationship between the joint flange surface of the mast and the mounting seat plate adapted. The holding piece can be fastened to the mast via the mast connection bolt hole using the bolt to secure the holding state in a stable state.

By doing so, the twisting action force generated along with the turning of the crane jib is held by the fixing force of the wedge pieces between the locking seat piece and the holding piece, and the guide roller portion is hindered. It is stably held without giving it and there is no problem.

When the need for a climbing operation arises, the lock pin on the crane part support frame side of the climbing mechanism is pulled out from the mast, and the support force of the wedge piece and the lock seat piece is loosened by pulling down the support frame slightly. After that, the climbing work can be performed by removing the holding piece from the mast side.

Embodiments Hereinafter, an embodiment of the device of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of a construction climbing crane suitable for incorporating the stabilizing device of the present invention.
Is a mast which is erected by adding a plurality of mast segments, and (2) is an outer mast having a known climbing mechanism (3) and attached to the upper end of the mast (1). (4) is a crane part mounted on the top end of the outer mast (2) through a turning mechanism (5 '). (5) is a swivel disk, and a large hole for suspending the mast is formed at a position directly above the mast (1). (6) is a jib, (7) is a jib support frame,
(8) is a hoist, (8 ') is a jib undulating winch,
(9) is a suspension line.

FIG. 2 is a plan view showing a state where the stabilizing device (10) of the present invention is attached, and the lock is provided at a plurality of places (four places in the embodiment) equally divided on the inner peripheral surface of the outer mast (2). Seat (11)
And a holding piece (15) which is attached to the top surface connecting flange portion (1a) of the mast (1) and engages with the locking seat piece (11), thereby forming a stable holding device (10).

The locking seat piece (11) is, as shown in FIGS. 2 and 3,
The outer mast (2), which is parallel to the inner peripheral surface of the mast, is arranged at appropriate intervals.
Each leg (12) (12) is fixedly supported in parallel with the axis and has a taper groove (13) with a downward slope on the front side.
Is engraved.

The holding piece (15) is attached to the top surface connecting flange portion (1a) of the mast (1) as shown in FIGS. 2 and 3 like the locking seat piece (11). ), A wedge piece (17) having a taper surface that matches the taper groove (13) of the locking seat piece (11) is drooped and fixed to the lower surface of the front end of
The seat plate (16) has two screw holes (1) with the same pitch as the connecting bolt hole (1b) provided in the flange portion (1a) of the mast.
8 '), and each of the screw holes (18') has a screw sleeve (18) engraved with an external thread. The screw sleeve (18) has a hollow hole having a size such that the upper end portion thereof can be easily rotated by a wrench or the like and the bolt (20) can be fastened to the mast flange portion (1a). (21) is a rock nut.

Such a locking seat piece (11) and a holding piece (15) are arranged such that after the climbing operation of the crane section is completed, the locking seat piece on the outer mast (2) side is opened from the opening of the revolving disc (5). (11) Arrange the holding piece (15) so that it matches the position, and then first set the wedge piece (17).
Engage with the taper groove (13) of the locking seat piece (11) and push in. This operation is performed at the combined portion of the locking seat piece (11) and the holding piece (15) so that the respective portions are substantially equal.

When the wedge piece (17) with the required depth is pushed into the taper groove (13), the screw sleeve (18) is screwed into the screw hole (18 ') of each holding piece (15), and the mounting seat plate (16) The distance between the lower surface and the upper surface of the flange (1a) of the mast (1) is
8) and then the sleeve (18) is fixed with a lock nut (21), and the bolt (20) is connected from inside the screw sleeve (18) to the flange portion (1a) connecting bolt hole (1a) of the mast (1). 1b) Penetrate and fasten.

By doing so, the mast (1) and the outer mast (2) are fixed, and even if the jib (6) turns during the operation of the crane, the turning force is stable.
0), it does not cause any problems as in the past.

In order to disassemble the stable holding device (10), the crane part climbing mechanism (3) is operated, the upper lock pin is pulled out, and the crane part (4) is slightly lowered, so that the locking seat piece (11) is removed. The locking force with the wedge piece (17) that was locked by engaging the taper groove (13) is removed. Therefore, by removing the holding piece (15) tightening bolt (20) on the mast (1) side and removing the holding piece (15), the crane can be climbed.

Although the number of the locking seat pieces (11) and the holding pieces (15) is four in the above embodiment, the number is not limited to this, and the number may be increased or decreased according to the diameter of the mast. Good.

Also, a slewing wheel mount (25) as shown in FIG.
However, when it is interposed between the top of the outer mast (2) and the swivel mechanism (5 ') attached to the swivel disc (5), the lower part of the inner periphery of the pedestal (25) is not limited to this. A locking seat piece (11) can be attached to the same to prevent the trouble due to the turning force from occurring as in the above-described embodiment.

Advantageous Effect of the Invention: According to the device of the present invention, at the top of the mast, the wedge piece of the holding piece detachably attached and the locking seat piece attached to the mast, which is attached to the inner circumference of the frame, are rotated. The mast and the crane part support frame can be firmly fixed to the external force in the direction, so that the fixed part can be kept in a stable state without being twisted by the turning of the jib. Moreover, during the climbing operation, the holding piece attached to the mast side can be easily removed, so that workability is not impaired. In particular, since the twisting due to the turning operation can be prevented, the lateral load does not act on the guide roller and the accessory mechanism is not damaged. Of course, the structure is simple, so there is no loss in economic efficiency.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a construction climbing crane suitable for incorporating the device of the present invention, FIG. 2 is a plan view with the device of the present invention attached, and FIG. 3 is an enlarged vertical sectional view of essential parts,
FIG. 4 is a view showing another example of the mounting portion. (1) ... Mast, (2) ... Outer mast (3) ... Climbing mechanism, (4) ... Crane section (5) ... Swivel board, (5 ') ... Swivel mechanism (6) ... Jib, (1a) ... Mast Flange (1b) ... Connection bolt hole (10) ... Stable holding device (11) ... Locking seat piece (13) ... Tapered groove (15) ... Holding piece, (16) ... Mounting seat plate (17) )… Wedge piece, (18)… screw sleeve (18 ′)… screw hole, (20)… fastening bolt (21)… lock nut (25)… swivel wheel mount

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takafumi Mitoma 4-27, Honmachi, Higashi-ku, Osaka, Osaka Prefecture Takenaka Corporation, Osaka Main Store (72) Haruo Miyagawa 4-27, Honmachi, Higashi-ku, Osaka Takenaka Corporation Osaka Main Store (72) Inventor Masato Iemura 4-27, Honmachi, Higashi-ku, Osaka City, Osaka Prefecture Takenaka Corporation Osaka Main Store (72) Inventor Jun Susu 4-27, Honcho, Higashi-ku, Osaka, Osaka Address Stock Company Takenaka Corporation Osaka Main Store (72) Creator Satoshi Taniguchi 4-27 Honmachi, Higashi-ku, Osaka City Osaka Prefecture Takenaka Corporation Osaka Main Store (72) Creator Atsushi Koshihara Minamienen Nishinari-ku, Osaka City Osaka 1-7-20 Koshihara Corporation

Claims (4)

[Scope of utility model registration request] 1. A construction crane having a climbing function: Inside a frame body that supports a crane portion and is fitted on a mast,
Locking seat pieces having a vertical taper groove are fixedly arranged at a plurality of places; the top of the mast is connected to the locking seat piece by utilizing a connecting hole on the upper surface of the connecting flange portion. A plurality of holding pieces to be fixed together are detachably arranged; the holding pieces are attached to the flange portion of the mast with at least two bolts, and the holding piece is fixed to the tip of the sitting board. A crane part stable holding device for a construction climbing crane, comprising: a wedge piece interposed between the tapered groove of the locking seat piece and the outer surface of the mast. 2. A frame body which supports a crane part and is fitted on a mast is an outer mast, and a locking seat piece is arranged on an inner periphery of the frame body near an upper slewing wheel mounting portion. Item 2. A crane unit stable holding device for a construction climbing crane according to Item 1. 3. A frame body which supports a crane part and which is fitted on a mast is a gantry arranged between an outer mast and a slewing wheel mounting part, and a locking seat piece is arranged on an inner circumference of the gantry. The crane part stable holding device of the construction climbing crane according to claim 1, which is provided. 4. The mounting seat plate of the holding piece is provided with a screw hole in accordance with a flange portion connecting hole pitch of the mast,
The crane part stable holding device for a construction climbing crane according to claim 1, further comprising a screw sleeve that is screwed into the screw hole to keep a fastening state constant.