JP3032615U - Non-rotating pin member and hammer grab crown using the same - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To save a labor for producing a dedicated clan pole pin corresponding to each claw pole mounting hole, and to provide a general-purpose detent pin member and a hammer grab crown using the pin member. To provide. SOLUTION: The hammer grab is used to support a clan pole 4 of a crown 1 and has a rod shape elongated in one axis direction and penetrates at one end in a direction intersecting the one axis direction,
A pin body 5a having a first through hole 5d into which a locating split pin is inserted at the time of mounting, and the pin body 5a.
In a pin member 5 provided at the other end of the pin body 5 and having a head portion 5b projecting radially from the pin body 5a, the head portion 5b is penetrated in a direction intersecting the uniaxial direction, and at the time of mounting. Second through hole 5c for positioning into which a jig is inserted
It has.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a hammer grab (a foundation pile excavator) for excavating a hole for driving a foundation pile in the construction field, and more particularly to a detent pin member for a crown for fixing the hammer grab.

[0002]

[Prior art]

 Conventionally, a crown for fixing a hammer grab to the tip of a chain from a crane has been known. The crown of this hammer grab is held at an appropriate height above the ground by multiple chains from the crane. The crown is equipped with a locking mechanism to detachably hold the hammer grab that is lifted and lowered by a crane to perform impact excavation. In addition, the crown is equipped with a supporting part that is held by a chain and a holding part that is swingably connected to the supporting part with bolts. The holding portion includes a body and a collar provided around the body. The locking mechanism is provided on the body of the holding part so as to project toward the collar side, and locks with the hammer head suspended by the chain of the hammer grab so that it can be disengaged.

FIG. 7A is a cross-sectional view mainly showing the locking mechanism of the hammerhead, and FIG. 7B is a partial perspective view showing this locking mechanism. As shown in FIGS. 7A and 7B, the locking mechanism 56 includes a clan pole 56a, which is a locking piece, and support pieces 53a provided integrally with the body 58 of the holding portion 53 on both sides thereof. And a clan pole pin 61 penetrating them.

Reference numeral 53b is a window portion opened in the color 59 of the reporting portion 53 for attaching the clan pole pin 61 and the like.

The clan pole pin 61 includes a head portion 63 and a main body portion 64, and a pin insertion hole 65 is provided at one end of the main body portion 64 opposite to the head portion 63 side. The cran pole 56a is rotated around the clan pole 56a by inserting the cran pole pin 61 into the holes provided in the clan pole 56a and the support pieces 53a provided on both sides thereof. It is movably supported.

After inserting the clan pole pin 61, the split pin is inserted into the pin hole 65 of the cran pole pin 61 and then deformed to prevent the clan pole pin 61 from coming off. If the cranpole pin 61 rotates during this work, it is difficult to deform the split pin 66. Also, when the split pin 66 is pulled out from the clan pole pin 61, it is difficult to straighten the split pin 66 when the clan pole pin 61 rotates.

Therefore, conventionally, a part of the outer periphery of the head portion 63 of the cranpole pin 61 is cut out to form a chordal flat portion 62, and the periphery of the insertion hole provided in the support piece 53a to be attached is provided. A thick portion 53c that comes into contact with the flat portion 62 of the clan pole pin 61 is provided in a part of this to prevent the cran pole pin 61 from rotating.

[0008]

[Problems to be solved by the device]

 However, the clan pole pin 61 used in the conventional locking mechanism cannot be used unless it is a dedicated clan pole pin, and there is a drawback in that the pin rotation stopper must be specially made.

In addition, since the thick portion 53c and the clan pole pin 61 must be sized, the versatility is poor.

Therefore, the technical problem of the present invention is to save the time and effort for producing a dedicated pin member corresponding to each attachment hole of the locking piece, and to use a general-purpose rotation stop pin member and it. To provide a crown of a hammer grab with a locking mechanism.

[0011]

According to the present invention, a locking mechanism for locking a hammer grab to a crown is used to support a locking piece, has a rod shape elongated in one axial direction, and has one end. A pin main body having a first through hole that penetrates in a direction intersecting the uniaxial direction and into which a locating pin for positioning is inserted at the time of mounting, and the pin main body provided at the other end of the pin main body. In a pin member having a head projecting from the main body in a radial direction, the head penetrates in a direction intersecting the uniaxial direction, and a positioning jig is inserted when the pin member is mounted. There is provided a detent pin member having a second through hole.

Further, according to the present invention, in the pin member with detent, the pin member is inserted into the first through hole to prevent rotation of the pin member in the axial direction when the pin member is mounted. A rotation stop pin member is provided, which is provided with a split pin for positioning the pin member in the uniaxial direction.

Further, according to the present invention, a crown of a hammer glove is obtained, which is provided with a locking mechanism having any one of the above-described rotation stop pin members and the locking piece.

[0014]

[Embodiment of device]

 Hereinafter, embodiments of the present invention will be described with reference to 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. Referring to FIG. 1, a hammer grab crown according to an embodiment of the present invention has the same structure as the conventional one except that the structure of the head pole pin 5 of the locking mechanism and its mounting portion is different from that of the conventional art. ing. That is, the crown 1 includes a crown body 10 and a hammer head 20 whose upper end is held by the crown body 10 through a locking mechanism.

The crown body 10 includes a support body 11 having a metal body 2 swingably supported via a connecting member 12 and a metal collar 3 forming an outer shell for covering the outside of the body 2. I have it. The support part 11 is held on both sides by chains 13a and 13b suspended from a crane (not shown). In this crown body 10, a clan pole 4 which is a locking piece of a locking mechanism is arranged between the body 2 and the collar 3, and the cran pole 4 is rotatable around a cran pole pin 5 as a central axis. It is set up in.

Further, the hammer head 20 includes a slide block 21 forming an upper end and a hammer head main body 22. The slide block 21 is provided with an engaging portion 21 a that projects outward and engages with the tip portion of the clamp pole 4.

A head pole 6 forming a locking mechanism for locking the support plate is provided near the lower end of the hammer head 20 so as to be rotatable around a head pole pin 7 as a central axis.

A chain 13c is connected to the upper end of the support plate 14, and an attachment portion 15 for attaching a hammer glove body (not shown) is provided at the lower end of the support plate 14 via a chain 13d.

2A and 2B are a sectional view and a plan view showing the crown body 10 of FIG. As shown in FIGS. 2 (a) and 2 (b), the crown body 10 includes a connecting member 12 such as a bolt on a support member 11 connected to the chains 13a and 13b via bolts 16a, b nuts 16c and d. It is swingably supported via.

The crown body 10 includes a body 2 and a collar 3 arranged around the body 2. The collar 3 is provided so as to be slidable in the axial direction with respect to the body 2.

Between the body 2 and the collar 3, an inverted trapezoidal clan pole 4 having a tip projecting from the hole 2a of the body 2 is arranged. A pair of support pieces 2b is provided so as to project in the direction, and the clan pole 4 is rotatably supported via a clan pole pin 5.

The locking mechanism is composed of a clan pole 4, which is a locking piece, a support piece 2 b, and a clan pole pin 5.

Reference numeral 2c is a window for mounting the clan pole.

FIG. 3 is a sectional view showing an example of the collar 3 of the crown body 10. As shown in FIG. 3, the collar 3 is a cylindrical shape having a window 3c for inserting a jig and a hole 3a through which one end of the clan pole 4 is exposed when the cran pole pin 5 is inserted. Have a shape. Incidentally, reference numeral 3d is a screw hole into which the screw 8 is inserted.

FIGS. 4A and 4B are a side view and a front view showing the clan pole pin 5 of FIGS. 1 and 2. Referring to FIGS. 4 (a) and 4 (b), the clan pole pin 5 has chamfers on both ends, and has a larger diameter than the pin body 5a at the axial ends of the pin body 5a and the pin body 5a. And the formed head 5b.

The head portion 5b is provided with through holes 5c, 5c formed so as to penetrate each other in the diametrical direction so as to be orthogonal to each other. At the other end of the pin body 5a, a split pin insertion hole 5d penetrating in the diameter direction is formed at a position corresponding to the through hole 5c with a predetermined relationship.

The through hole 5c provided in the head portion 5b of the cran pole pin 5 has a predetermined angular position at which the split pin insertion hole 5d is located when the clan pole 4 is mounted by the cran pole pin 5. As described above, it is provided to insert a jig for fixing.

FIG. 5A is a sectional view showing the hammer head 20 of FIG. 5 (b) is a plan view of the hammer head 20 of FIG. 5 (a). As shown in FIGS. 5 (a) and 5 (b), the hammer head 20 has the same structure except that the structure of the head pole pin 7 of the locking mechanism and its mounting portion is different from that of the prior art. That is, the slide block 21 and the hammerhead main body 22 are provided, and the central portion is formed with a hollow portion that penetrates vertically. The hammerhead main body 22 includes a fixed cylindrical portion 23 extending to the lower end, a flange portion 24 fixed around the fixed cylindrical portion 23, and a protruding portion 25 fixed to the flange portion and protruding in a substantially triangular shape in the radial direction. The slide block 21 and the fixed cylindrical portion 23 are fixed via a screw 21b.

As best shown in FIG. 5B, the collar portion 24 and the protruding portion 25 are fixed via a screw 26. Further, the collar portion 24 and the fixed cylindrical portion 23 are provided so as to be relatively slidable in the direction along the axis. The fixed cylindrical portion is urged downward 23 with respect to the collar 24 by a spring provided at the lower end of the hammer head body 22. The screw 24a is fixed to the collar 24 through a washer 24b and reaches the fixed cylindrical portion 23, which serves as a stopper here. Further, openings 24c and 23a are provided on one side surface of the flange 24 and the fixed cylindrical portion 23, respectively, and the head pole 6 is provided through the openings 23a and 24c.

The head pole 6, which forms the locking piece of the locking mechanism, is configured to be supported by the projecting portions 25 provided at both ends via the head pole pin 7. A chain 13c is connected to the center of the upper surface of the support plate 14, and a mounting portion 15 for mounting a hammer glove body (not shown) is provided on the lower surface of the support plate 14 via the chain 13d. When the support plate 14 attached to the chain 13c and the attachment portion 15 provided via the chain 13d at the tip end of the hammer head 20 are inserted, the support plate 14 and the attachment portion 15 are sequentially attached to the head pole. Hit the tip of No.6.

However, the weight of the support plate 14 and the mounting portion 15 causes the head pole 6 to rotate clockwise in FIG. 5A to pass through the support plate 14 and the mounting portion 15. Let When the mounting portion 15 passes through the head pole 6, the head pole 6 is rotated counterclockwise and the chain 13c is pulled up, and the upper surface of the support plate 14 collides with the lower portion of the tip of the head pole 6. Then, although it rotates counterclockwise, the other end abuts against the upper surface of the collar portion 24 and does not rotate any further, so it is locked.

FIGS. 6A and 6B are a front view and a side view showing the head pole pin 7 shown in FIGS. 1 and 5. Referring to FIGS. 6 (a) and 6 (b), the head pole pin 7 has a long pin body 7a in a uniaxial phrase, and a diameter larger than that of the head pole pin body 7b at one axial end of the pin body 7a. And a head 7b. This head portion 7b is provided with through holes 7c, 7c which are formed so as to penetrate each other so as to be orthogonal to each other in the diametrical direction. A split pin insertion hole 7d is formed at the other end of the pin body 7a so as to penetrate in the diameter direction. Further, the through hole 7c provided in the head portion 7b is fixed so that the position of the split pin insertion hole 7a becomes a predetermined angular position when the head pole 6 is mounted by the head pole pin 7. It is provided to insert a jig for.

[0034]

[Effect of device]

 As described above, in the present invention, it is possible to save the labor of producing a dedicated pin member for each attachment hole of the locking piece of the locking mechanism, and to provide a versatile detent pin member. The crown of the hammer glove used can be provided.

[Brief description of drawings]

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

2 (a) and 2 (b) are a cross-sectional view and a plan view showing the crown body 10 of FIG.

FIG. 3 is a sectional view showing an example of a collar 3 of the crown body 10.

4 (a) and (b) are clan pole pins 5 of FIG.
It is a side view and a front view showing.

5 (a) is a sectional view showing the hammer head 20 of FIG. 1. FIG. (B) is a plan view of the hammerhead 20 of (a).

6 (a) and 6 (b) are a front view and a side view showing the head pole pin 7 shown in FIGS. 1 and 2. FIG.

FIG. 7A is a transverse sectional view mainly showing a locking mechanism of a crown of a conventional hammer grab. (B) is a partial perspective view showing this locking mechanism.

[Explanation of symbols]

 1 Crown 2 Body 2a Hole 2b Support Piece 3 Collar 3a Hole 3c Window 3d Screw Hole 4 Cranpole 5 Cranpole Pin 5a Pin Body 5b Head 5c Through Hole 5d Split Pin Insertion Hole 6 Headpole 7 Headpole Pin 7a Pin body 7b Head portion 7c Through hole 7d Split pin insertion hole 8 Screw 10 Crown body 11 Support portion 12 Connection member 13a, 13b, 13c, 13d Chain 14 Support plate 15 Attachment portion 20 Hammerhead 21 Slide block 21b Screw 22 Hammerhead Main body 23 Fixed cylindrical portion 23a Opening 24 Collar 24a Screw 24b Washer 24c Opening 25 Projection 26 Screw 53 Holding 53a Support piece 53b Window 53c Thick 56a Cranpole 61 Cranpole pin 63 Head 64 Main body Part 65 pin insertion hole 6 split pin

Claims (3)

[Scope of utility model registration request] 1. A locking mechanism for locking a hammer grab to a crown, which is used to support a locking piece, has a rod shape elongated in one axial direction, and has one end penetrating in a direction intersecting the one axial direction, A pin main body having a first through hole into which a locating pin for positioning is inserted at the time of mounting, and a head provided at the other end of the pin main body and projecting radially from the pin main body In the pin member, the head portion is provided with a second through hole that penetrates in a direction intersecting the uniaxial direction and into which a positioning jig is inserted when the pin member is mounted. Characteristic pin member with rotation stop. 2. The detent pin member according to claim 1, wherein the pin member is inserted into the first through hole to prevent rotation of the pin member in the axial direction when the pin member is mounted. A rotation stop pin member, comprising a split pin for positioning the member in the uniaxial direction. 3. A crown of a hammer glove, comprising a locking mechanism having the detent pin member according to claim 1 or 2 and the locking piece.