JP2000274177A - Suspension member for hammer grab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension member for which any possible disconnection can be inferred easily and a hammer grab device using thereof. SOLUTION: A hammer head 70 of a hammer grab is supported and linked and held with a crown 50 suspended from a crane, and the suspension member 1 for operation comprises a joining piece 14 arranged and linked inside the crown 50, a wire rope 2 having a double portion bent and returned at one end side and extended to other end side, which is provided through the joining piece 14, and a fixing member 4 approaching the terminal of the double portion of the wire rope 2 and fixing the terminal by caulking. The fixing member 4 is linked in a direction of the joining piece 14 moving from one end of the wire rope 2 to the other end side thereby blocking the movement of the joining piece 14 to that direction in the configuration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hammer grab (digging machine for foundation pile) for excavating a hole for driving a foundation pile in the construction field, and more particularly to a hammer grab for operating and supporting a hammer grab from a crane. The present invention relates to a suspension member and a hammer grab apparatus using the same.

[0002]

2. Description of the Related Art Conventionally, a crown for fixing a hammer grab to a tip of a chain from a crane has been known. The crown of the hammer grab is held at an appropriate height from the ground by a plurality of chains from a crane. The crown is provided with a locking mechanism for detachably holding a hammer grab operated by a crane to perform impact-type excavation. Also, in the crown,
It has a supporting portion held by a chain, and a holding portion which is swingably connected to the supporting portion by a bolt or the like.
The holding part has a body and a collar provided around the body. The locking mechanism is provided on the body of the holding portion so as to protrude toward the collar, and lockably and removably locks the hammer head suspended by the hammer glove chain.

FIG. 10 is a partially cutaway sectional view showing a crown of a hammer grab according to the prior art (see Japanese Utility Model Registration No. 5735, hereinafter referred to as the prior art). Referring to FIG. 10, a crown 50 of a hammer grab according to the prior art has a support portion 61 held by chains 63a and 63b suspended on both sides from a crane (not shown).
A crown main body 60 swingably supported by the support portion 61; and a hammer head 70 having an upper end held by the crown main body 60 via a clamp pole 53.

[0004] Near the lower end of the hammer head 70, a chain 63 hanging down from above through the crown body 60 is provided.
c is connected, and at the lower end, a joining piece 64 provided with a mounting portion 65 connected to a hammer grab body (not shown) via a chain 63d is provided. Further, the protrusion 77 at the lower end is connected to a hammer grab main body (not shown).

[0005] The joining piece 64 is locked by a head pole 55 provided inside the lower end of the hammer head 70.

FIG. 11 is a sectional view showing the hammer head 70 of FIG. FIG. 12 is a plan view of the hammer head 70 of FIG. As shown in FIGS. 11 and 12, the hammer head 70 includes a slide block 71 and a hammer head main body 72. The hammer head main body 72 includes a fixed cylindrical portion 73 extending to a lower end, a flange portion 74 fixed around the fixed cylindrical portion 73, and a protrusion 75 fixed to the flange portion and projecting in a substantially triangular shape in the radial direction. The projecting portion 77 at the lower end of the fixed cylindrical portion 73 is connected to a hammer grab main body (not shown). The flange 74 and the fixed cylindrical portion 7
3, one side surface is provided with openings 74c and 73a, respectively.
The head pole 55 extends through the openings 73a and 74c.
Is provided. The head pole 55 is supported by protrusions 75 provided at both ends via a head pole pin 56.

A joining piece 64 attached to the chain 63c from above the hammer head 70,
Attachment part 7 provided at the end via a chain 63d
When the insert 5 is inserted, the joining piece 64 and the mounting portion 75 sequentially come into contact with the tip of the head pole 55.

However, the head pole 55 is rotated clockwise in FIG. 11 by the weight of the joining piece 64 and the mounting portion 75 to pass the joining piece 74 and the mounting portion 75. . When the mounting portion 75 passes through the head pole 55, the head pole 55
Is rotated counterclockwise, and the chain 63c is pulled upward, the upper surface of the support plate 64 collides with the lower end of the head pole 55 and rotates counterclockwise. 74, and stops because it does not rotate any further.

[0009]

As described above, in the prior art, the load of the hammer glove body is applied to the chains 63c and 63d as the suspension members.

However, when a load is applied from the hammer grab main body, the chains 63c and 63d have a structure in which steel track-shaped rings are passed through each other and connected to each other. Even if the chain 63c or 63d is suddenly broken during the work, the chains 63c and 63d will be cut. As a result, the hammer grab will fall during the work and the work cannot be continued. There was a risk of danger to the surroundings.

It is an object of the present invention to provide a suspension member which can easily detect the possibility of cutting and a hammer grab apparatus using the same.

[0012]

According to the present invention, there is provided a lifting device for supporting a hammer head of a hammer glove and operating the hammer glove while hanging the hammer glove which is engaged with a crown suspended by a lifting device. The holding member has a joining piece disposed in the crown and engaged with the crown, and a double part that is folded back at one end and extends toward the other end and extends from the one end to the other end. A wire rope provided through the joining piece, and a fixing member for fixing the end by caulking in proximity to the end of the double part of the wire rope, the fixing member comprising: The wire rope is provided with a structure for locking so as to prevent movement of the joining piece in a direction from the one end to the other end. That hanging member can be obtained.

According to the present invention, in the hanging member, the fixing member and the joining piece are
The portions that come into contact with each other include a tapered outer surface and a tapered inner surface each having a shape corresponding to each other, and when a load is applied to the joining piece in a direction from the one end to the other end, the tapered inner surface is tapered. A suspension member is obtained in which the fixing member is formed such that a force such that the fixing member radially contracts acts on the outer surface.

Further, according to the present invention, there is provided a hammer grab apparatus comprising any one of the above-mentioned hanging members.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially cutaway sectional view mainly showing a crown of a hammer glove according to an embodiment of the present invention.

Referring to FIG. 1, a prior art hammer grab crown 50 includes a crown body 60 and a hammer head 20 having an upper end held on the crown body via a locking mechanism.

The crown body 60 includes a metal body 51 supported on a supporting portion 61 so as to be swingable via a connecting member 62, and a metal collar 52 forming an outer shell for covering the outside of the metal body 51. ing. The support portion 61 is held on both sides by chains 63a and 63b suspended from a crane (not shown). In the crown main body 60, a clan pole 53 serving as a locking piece of a locking mechanism is disposed between the body 2 and the collar 3, and the clan pole 53 is rotatable around a cran pole pin 54 as a center axis. It is provided in.

The hammer head 70 includes a slide block 71 serving as an upper end and a hammer head main body 72. The slide block 71 projects outward,
An engaging portion 71a that engages with the tip of the clan pole 53 is provided.

A head pole 55 serving as a locking mechanism for locking the joining piece 14 is provided near the lower end of the hammer head 70 so as to be rotatable about a head pole pin 56 as a center axis.

The joining piece 14 is penetrated by a double wire rope 2 constituting the hanging member 1.
The upper end of the wire rope 2 forms a hanging portion 5 so as to be connectable to an operation chain of a lifting device (not shown). The hanging portion 5 includes a center member 7 having a groove having a substantially semicircular cross section on the outside, a wire rope 2 wound around the center member 7,
A fixing member 6 for caulking and fixing the base of the ring portion is provided.

The wire rope 2 at the upper end of the joining piece 14 is attached to the wire rope 2 so as to be in close contact with the upper end surface.
The fixing member 3 is fixed by caulking, and the wire rope 2 at the lower end of the joining piece 14 is also fixed by caulking, and a part of the upper end of the fixing member 4 is accommodated in the joining piece 14.

Further, a double wire row 2 extends below the fixing member 4 and becomes a single wire rope 2.
A fixing member 8 is provided and fixed by caulking just before the end point. These joining pieces 14
, Wire rope 2, center member 7, fixing member 3,
The suspension member 1 is constituted by 4, 6, and 8.
The lower part of the fixing member 8 of the wire rope 2 is connected to a hammer glove body (not shown).

FIGS. 2 and 3 are a sectional view and a plan view showing the crown main body 60 of FIG. As shown in FIGS. 2 and 3, the crown main body 60 swings via a connecting member 62 such as a bolt to a supporting member 61 connected to the chains 63a and 63b via bolts 66a and 66b and nuts 66c and 66d. Supported as possible. In addition, to suspend
Wire ropes can also be used in addition to the chains 63a and 63b.

The crown body 60 has a body 51 and a collar 52 arranged around the body 51. The collar 52 is provided slidably in the axial direction with respect to the body 51.

Between the body 51 and the collar 52, an inverted trapezoidal clam pole 53 whose tip projects from the hole 51a of the body 51 is arranged. A pair of support pieces 51b are provided to protrude and support the clan pole 53 rotatably via a clan pole pin 54.

[0027] The locking mechanism is a clan pole 5 which is a locking piece.
3, a support piece 51b, and a clamp pole pin 54. Reference numeral 51c is a window for attaching a clan pole.

FIG. 4 is a sectional view showing an example of the collar 52 of the crown main body 60. As shown in FIG.
Has a cylindrical shape provided with a window 52c for inserting a jig and a hole 52a for exposing one end of the clamp pole 63 on the side surface when the clamp pole pin 54 is inserted. Reference numeral 52d denotes a screw hole for inserting the screw 58.

FIG. 5 is a sectional view showing the hammer head 70 of FIG. FIG. 6 is a plan view of the hammer head 70 of FIG. As shown in FIGS. 5 and 6, the hammer head 70 has the same configuration as that of the prior art except that the suspension member is different. That is, the suspending member 1 according to the embodiment of the present invention includes the chains 63c and 6 according to the related art.
The 3d portion and the joining piece 14 are changed to the wire rope 2, the joining piece 14, the center member 7, and the caulking members 3, 4, 6, and 8.

The hammer head 70 according to the embodiment of the present invention comprises a slide block 71 and a hammer head main body 7.
2 and a central portion is formed with a hollow portion penetrating vertically.

The hammer head body 72 has a fixed cylindrical portion 73 extending to the lower end and a flange portion 74 fixed around the fixed cylindrical portion 73.
And a protruding portion 75 fixed to the flange portion 74 and protruding in a substantially triangular shape in the radial direction. The slide block 71 and the fixed cylindrical portion 73 are fixed via screws 71b.
Further, the fixed cylindrical portion 73 is connected to a hammer grab main body (not shown).

As best shown in FIG.
And the protruding portion 75 are fixed via screws 76.
In addition, the flange portion 74 and the fixed cylindrical portion 73 are provided so as to be relatively slidable in a direction along the axis. The spring 7 provided at the lower end of the hammer head main body 72 allows the flange 7
The fixed cylindrical portion is urged 73 downward with respect to 4.
The screw 74a is fixed to the flange 74 via a washer 74b and reaches the fixed cylindrical portion 73, where it serves as a stopper. In addition, openings 74c and 73a are provided on one side surface of the flange portion 74 and the fixed cylindrical portion 73, respectively, and a head pole 55 is provided through the openings 73a and 74c.

The head pole 55 which forms a locking piece of the locking mechanism
Are supported by protrusions 75 provided at both ends via a head pole pin 56.

The joining piece 14 of the suspending member 1 is provided with an oval through hole 14a and a boss 14 projecting from the lower end of the through hole 14a. Wire rope 2 is provided. The wire rope 2 extends upward from the lower end, bends, becomes the upper end, extends downward again, and terminates in the middle of the lower end.

The wire rope 2 on the lower side of the joining piece 14 of the joining piece 14 is fixed by caulking a cylindrical fixing member 4. The upper end of the fixing member 4 is formed with corresponding smooth curves so that the upper end can be accommodated in the boss portion 14 of the joining piece 14, whereby the fixing member 4 is moved in the radial direction. To prevent it from spreading.

A fixing member 3 is fixed by caulking around the double wire rope 2 in close contact with the upper end of the joining piece 14.

Further, the wire rope 2 extending below the fixing member 4 is unitary on the way, and is fixed by caulking a cylindrical fixing member 8 near the end of the double portion. Have been. The fixing members 3 and 4 prevent the double wire rope 2 from being separated from each other and from being shifted in the vertical direction.

The lower end of the wire rope 2 is connected to a hammer grab body (not shown). When the joining pieces 14 penetrated by the wire rope 2 are inserted from above the hammer head 70, the joining pieces 14 abut against the tip of the head pole 55.

However, the head pole 55 is rotated clockwise in FIG. 6 by the weight of the joining pieces 14 to pass through the joining pieces 14. Joining piece 14 is head pole 5
5, the head pole 55 is rotated counterclockwise and the wire rope 2 is pulled upward, and the upper surface of the joining piece 14 collides with the lower end of the head pole 55, and moves counterclockwise. However, the other end abuts against the upper surface of the flange portion 74, and does not rotate any further, so that it is locked.

FIG. 7 is a partial front view showing the hanging member 1. Referring to FIG. 7, the hanging member 1 includes a joining piece 14 and a steel wire rope that penetrates the joining piece 14 and is doubled to a lower portion, and forms a ring-shaped hanging portion 5 above. 2, a central portion 7 which forms the center thereof, a fixing member 6 which is provided below the suspension portion 5 and holds and fixes the wire rope 2 in a double state by caulking, and in the vicinity of above the joining piece 14. A cylindrical fixing member 3 for holding and fixing the wire rope 2 in a double state by caulking; and a cylindrical fixing member 3 provided below the joining piece 14 and near a shorter end of the double wire rope. And a cylindrical fixing member 4 for holding and fixing the wire rope 2 in a double state by caulking and preventing the joining piece 14 from dropping downward. It provided near square of the end point of the double portion, and a fixing member 8 fixed by caulking.

FIG. 8 is a partial sectional view showing the vicinity of the joining piece 14 of FIG. As shown in FIG. 8, an elliptical through-hole 14a of the joining piece 14 and a boss 14b provided around the lower end of the through-hole 14a and protruding in a cylindrical shape are provided. The through hole 14a is a curved surface 1 whose cross section forms a gentle curve in the length direction.
4dc. The double wire rope 2 is provided through the through hole 14b. The wire rope 2 is caulked and fixed by a substantially cylindrical fixing member 4 having an oval through hole at the center. The fixing member 4 has a curved surface such that the cross section of the upper end portion draws a gentle curve in the length direction corresponding to the curved surface 14c so that the fixing member 4 can be accommodated in the boss portion 14b. After the fixing member 4 is provided, the wire rope 2 is pulled upward, the upper end of the fixing member 4 is accommodated in the boss 14b, and then the fixing member is brought into close contact with the upper end of the joining piece 14. Secure by caulking 3. Thereafter, the terminal portion of the lower double portion is fixed by caulking the fixing member 8.

With this structure, the fixing member 4 supports the joining piece 14, so that even when a load is applied to the joining piece 14 downward, the joining piece 14 falls below the wire rope 2. In addition, a load is applied radially inward to the upper end of the fixing member 4 and spreads in the radial direction of the fixing member 4, so that the fixing member 4 can be prevented from falling off from the wire rope 2. The fixing member 4 has a substantially cylindrical shape without a cut. However, even when the fixing member 4 has a shape such that the side end face is opposed to the crimped side or the side end part overlaps the outer side face, there is a cut. Needless to say, it may have a cylindrical shape.

FIG. 9A is a sectional view showing the upper end of the suspension member 1, and FIG. 9B is a sectional view taken along line IX-IXB of FIG. 9A. As shown in FIGS. 9A and 9B, a hanging portion 5 is formed in a ring shape at the end of the double-folded bent portion. The hanging portion 5 has a substantially semicircular cross section provided along the outer peripheral surface, and has a central member 7 having a through hole at the center, and a wire rope 2 wound around the central member 7.
And a fixing member 6 fixed to the base of the hanging portion 5 by caulking. The fixing member 6 is caulked and fixed in the same manner as 3, 4, and 8.

As described above, in the embodiment of the present invention, since the wire rope 2 is used instead of the chain of the hanging member, the wire rope 2 is visually inspected from the cutting condition of each wire. By this, it is possible to detect the time when the entire wire rope 2 is cut, and the cut is not suddenly broken like a chain,
Since it takes time until all the batteries are cut, it is possible to predict the replacement time in advance and to work safely.

[0045]

As described above, in the present invention, by using a wire rope for the suspension member,
It is possible to easily detect the possibility of disconnection from the appearance, to provide a hanging member that can be safely operated, and that can be easily maintained, and a hammer grab apparatus using the same.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view showing a crown of a hammer glove according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the crown main body 10 of FIG.

FIG. 3 is a plan view showing the crown main body 10 of FIG.

FIG. 4 is a sectional view showing an example of a collar of a crown body.

FIG. 5 is a sectional view showing the hammer head of FIG. 1;

FIG. 6 is a plan view of the hammer head of FIG. 5;

FIG. 7 is a partial front view of the hanging member of FIG. 1;

FIG. 8 is a partial cross-sectional view mainly showing a joint piece part of FIG. 7;

FIG. 9A is a partial front sectional view showing the hanging part of FIG. 7; (B) is a sectional view taken along line IXB-IXB of (a).

FIG. 10 is a partially cutaway sectional view showing a crown of a conventional hammer glove.

FIG. 11 is a sectional view showing the hammer head of FIG. 10;

FIG. 12 is a plan view of the hammer head of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suspension member 2 Wire rope 3, 4, 6, 8 Fixing member 5 Hanging part 7 Center member 50 Crown 51 Body 51a Hole 51b Support piece 52 Collar 52a Hole 52c Window 52d Screw hole 53 Clan pole 54 Clan pole pin 55 Head Pole 56 Head Pole Pin 56d Split Pin Insertion Hole 57 Screw 60 Crown Body 61 Supporting Part 62 Connecting Member 63a, 63b, 63c, 63d Chain 14, 64 Joining Piece 65 Mounting Part 70 Hammer Head 71 Slide Block 71b Screw 72 Hammer head body 73 Fixed cylindrical portion 73a Opening 74 Flange 74a Screw 74b Washer 74c Opening 75 Projection 76 Screw

Claims (3)

[Claims] 1. A suspending member for supporting a hammer head of a hammer glove and operating the hammer glove to be engaged with a crown suspended by a hoist, while suspending the hammer glove. A joining part that engages with the crown, a double part that is folded back at one end and extends toward the other end and extends from the one end to the other end, and is provided through the joining piece. And a fixing member for fixing the end by caulking and being close to the end of the double portion of the wire rope, wherein the fixing member extends from the one end of the wire rope to the other end. A hanging member having a structure for locking so as to prevent the movement of the joining piece in a direction toward it. 2. The hanging member according to claim 1, wherein the fixing member and the joining piece each have a tapered outer surface and a tapered inner surface having shapes corresponding to each other at portions where they come into contact with each other. When a load is applied to the ning piece from the one end toward the other end, the tapered inner surface is formed such that a force such that the fixing member radially contracts against the tapered outer surface acts. A suspending member. 3. A hammer grab device comprising the hanging member according to claim 1.