JP2017002596A - Block lifting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a block lifting tool that can be constituted in a simple structure, and can reliably lock and stably convey concrete block even with lifting points of various thickness.SOLUTION: A block lifting tool includes a body frame 11 extending laterally, locking arms 21 including locking claws 23 for locking to a concrete block 600 on each crosswise left and right side of the body frame 11, and pivoting means 40 for pivotally pivoting the locking arm 21 to the body frame 11 between a locking posture Sx for locking in the lower surface of a lifting point 610 by the locking claws 23 and a laterally inclined tilt posture Sy to the locking posture Sx. In the locking arm 21, interval adjusting means 26 is included which adjusts an interval between the locking claw 23 in the state where the locking arm 21 is in the locking posture Sx and an opposite portion 11d in the body frame 11 opposed to the locking claw 23 across the lifting point 610 by lifting the locking arm 21 using a lifting member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a block lifting tool suitable for lifting a concrete block having an upper surface opening used as a side groove, for example.

  Conventionally, for example, a concrete block having a top plate portion with an opening provided in the center in plan view is used as a side groove such as a variable side groove in order to arrange a lid member such as a grating.

  As a block lifting tool for transporting such a concrete block, a locking arm pivotally attached to both sides of a body frame extending in the lateral direction is inserted into an opening provided in the top plate portion of the concrete block, and the locking is performed. There is a type in which a locking claw provided on an arm is locked to a lower surface of an edge of the opening, and is lifted and transported using a crane.

  The block lifting tool described in Patent Document 1 exemplified as such a block lifting tool is provided with a locking claw from a posture of being inserted into an opening provided in a top portion of a concrete block by lifting the block lifting tool. A link mechanism is provided that changes the position of the locking arm to a position that locks the concrete block at the lifting position.

  Specifically, in the block lifting tool in Patent Document 1, a holding arm body as a locking arm projecting a locking piece is pivotally mounted on the left and right sides of a lifting beam body extending in the lateral direction, and a guide is provided at the center of the lifting beam body. A square tube is erected, an elevating angle tube is fitted into this guide square tube, and an upper suspension link, an adjustment link, and the above-mentioned gripping arm body are respectively attached to the left and right end portions of the horizontal link attached to the elevating angle tube. A link mechanism connected in this order is configured.

By the way, in general, the block suspension is required to have high strength because a heavy load is applied when the heavy concrete block is lifted.
However, the block lifting tool of Patent Document 1 provided with the link mechanism described above has a complicated structure and a structure with a large number of parts, which may cause problems.

Registered Utility Model No. 2544294

  Therefore, the present invention provides a block lifting tool that can be configured with a simple structure and that can securely lock the concrete block even at the lifting portions of various thicknesses and stably transport the concrete block. With the goal.

  The present invention includes a main body frame that extends in the lateral direction, a locking arm that includes a locking claw that locks a lower surface of a lifting portion of the concrete block on each of the lateral left and right sides of the main body frame, and the locking claw The locking arm is pivotally attached to the main body frame so as to be pivotable between a locking posture for locking to the lower surface of the lifting portion and a tilting posture inclined in the lateral direction with respect to the locking posture. Pivoting means, provided on the locking arm is an arm lifting connecting portion that is connected to a lifting member that lifts the locking arm, and the lifting arm is connected to the locking arm by the lifting member via the arm lifting connecting portion. By lifting, the interval between the locking claw when the locking arm is in the locking posture and the facing portion of the main body frame facing the locking claw across the lifting position is adjusted. Characterized by comprising a gap adjusting means that.

  By this invention, it can be locked corresponding to the said lifting location of various thickness, and a concrete block can be safely conveyed in the stable state.

  More specifically, since the interval between the locking claw and the facing portion of the main body frame can be adjusted by the interval adjusting means according to the thickness of the lifting location of the concrete block, the lifting location of various thicknesses The locking claw can be reliably locked to the lifting position corresponding to the above.

  The locking claw is locked to the lower surface of the lifting part of the concrete block, and the upper surface of the lifting part can be regulated by the facing part in the main body frame in a state where the distance is adjusted. The concrete block can be stably conveyed so as to be sandwiched between the nail and the facing portion of the main body frame.

  Further, for example, the concrete block is lifted by one operation of lifting the locking arm by the lifting member via the arm lifting connection portion without manually adjusting the distance between the locking claw and the facing portion. Since both the adjustment of the interval between the engaging claw and the facing portion can be performed, the concrete block can be easily and stably conveyed.

  In addition, when the locking arm is locked to the lifting position, the locking arm can be locked to the lifting position after the posture is changed from the tilted position to the locking position. And can be easily locked.

  In addition, according to the present invention, the interval between the engaging claw and the opposed portion of the main body frame can be adjusted by the interval adjusting means without adopting a complicated configuration such as a link mechanism, and the number of parts can be reduced. In addition, since it can be realized with a simple structure, it is possible to reduce the weight, and it is possible to provide a block lifting tool having excellent durability in transporting a heavy concrete block in the field.

  As an aspect of the present invention, the locking posture is provided on the lower surface of the lifting portion from the inner side in the lateral direction to the outer side by the locking claws provided so as to protrude toward the outer side in the lateral direction on the locking arm. The posture of the locking arm to be locked is set, and the tilted posture is the posture of the locking arm that is inclined so that the locking claw is disposed inside the lateral direction with respect to the locking posture, The locking arm can be configured to change from the tilted posture to the locking posture by lifting the locking arm via the arm lifting coupling portion by the lifting member.

  According to the present invention, the posture change of the locking arm from the tilted posture to the locking posture can also be performed by lifting the locking arm by the lifting member. It is not necessary to lock the locking claw at the lifting position by changing the above, and the locking claw can be easily locked at the lifting position.

  Further, as an aspect of the present invention, the pivoting means is composed of a pivotal recess formed in at least one of the main body frame and the locking arm, and a pivotal projection that engages with the pivotal recess. The pivoting projection is slid between a pivot position where the locking arm can be pivotally supported in the tilted position and a locking position where the locking claw is locked to the lower surface of the lifting position by lifting. The spacing adjusting means can be constituted by the pivot recesses formed in a possible manner.

  According to the present invention, the locking arm is pivotally supported in the inclined posture by the pivoting projection by arranging the pivoting projection at the pivot position. Without interfering with the concrete block, the concrete block can be smoothly arranged from the lower surface of the lifting portion to a position where it can be locked.

  Further, by disposing the pivoting projection at the locking position, the locking claw of the locking arm whose posture is changed from the tilted posture to the locking posture by lifting the locking arm is adjusted. And can be securely locked to the lower surface of the lifting portion.

  Here, the pivot projection is not particularly limited as long as the pivot projection can be engaged with the pivot recess. For example, the pivot projection protrudes from the main body frame toward the pivot recess formed in the locking arm. It may be formed integrally with the main body frame, or may be a pivot pin inserted through a through hole formed in the main body frame and the pivot attachment recess formed in the locking arm. Good.

  As an aspect of the present invention, the pivot recess is formed in the locking arm, and the pivot support position in the pivot recess is connected to the arm lifting connection in the lateral direction with respect to the center of gravity of the locking arm. It can be set to a position shifted to the side having the portion and a position above the locking position.

  According to the present invention, the pivoting convex portion is disposed at the pivotal support position, and the locking arm can be surely in the inclined posture in a state where the locking arm is not lifted by the lifting member.

  Therefore, the locking arm can be smoothly arranged so that the locking claw can be locked from its lower surface with respect to the lifting position of the concrete block without the locking claw interfering with the concrete block. The effect mentioned above can be acquired reliably.

  Further, as an aspect of the present invention, the pivot recess is provided with a latch recess having the latch position and extending in the interval adjustment direction, and a position having the pivot support position and shifted from the upper end of the latch recess. It is possible to form a substantially square shape with a pivot recess extending to the side.

  In this way, by forming the pivoting recess in a generally U shape, the locking arm in a state where the pivoting projection is in the pivotal recess and is not lifted by the lifting member is tilted. It can be a posture.

  On the other hand, when the pivoting convex portion is arranged in the locking concave portion, when the locking arm is lifted by a lifting member, the pivoting convex portion is compared with the case where the pivoting convex portion is arranged in the pivotal concave portion. It is possible to easily change the posture of the stop arm to the locking posture.

  Therefore, by forming the pivoting concave portion in a substantially U shape by the locking concave portion and the pivotal concave portion, the pivoting convex portion can be smoothly moved between such a locking position and the pivotal position. It is possible to move to.

As an aspect of the present invention, a weight portion can be provided on the outer side in the lateral direction with respect to the pivot position in the locking arm.
According to the present invention, since the center of gravity of the locking arm can be decentered outward in the lateral direction, the locking arm is not lifted by the lifting member via the arm lifting connection portion. Since the arm can be pivotally supported by the pivoting convex portion in a state where the arm is more reliably in the inclined posture, the locking arm does not interfere with the concrete block from the lower surface of the lifting point of the concrete block. The above-described effect of being able to arrange smoothly so that it can be locked by the locking claw can be obtained more reliably.

  Further, as an aspect of the present invention, the opposed portion of the main body frame can come into contact with the upper surface of the lifting portion in the lifting state in which the pivoting convex portion is disposed at the locking position in the pivoting concave portion. .

  According to this invention, since the main body frame is placed on the upper surface of the lifting portion in a state where the pivoting projection is disposed at the locking position, the weight of the concrete block is caused by the weight of the main body frame. The lifting point can be pressed down.

  Therefore, in the state where the locking claw is locked to the lower surface of the lifting part, the lifting part can be sandwiched from the upper and lower sides of the main body frame facing the locking claw and the locking claw. it can.

  That is, not only the pulling force when the locking arm is lifted by the lifting member, but also the lifting point can be locked by a locking force including the weight of the main body frame. The concrete block can be lifted stably in a state where it is locked with.

Further, as an aspect of the present invention, the arm suspension connecting portion can be disposed on the side opposite to the side having the locking claw with respect to the pivot position in the locking arm.
According to the present invention, the arm lifting connection portion can be arranged so that the distance from the locking claw of the arm lifting connection portion is farther than that of the pivot position. When lifting the arm, it is possible to avoid the possibility that the lifting member interferes with the locking claw.

  Further, the lifting connection portion for the arm, which becomes a power point when lifting the locking arm, is opposite to the side having the locking claw that acts as an operating point with respect to the pivot position serving as a fulcrum in the locking arm. When the locking arm is lifted, the lifting force acting on the lifting connection portion for the arm is applied to the locking claw by using the principle of the heel with the pivoting projection that pivotally supports the locking arm as the locking arm is lifted. It becomes easy to convey as a locking force, and an excellent locking force of the lifting portion of the concrete block by the locking claw can be obtained.

As an aspect of the present invention, the main body frame can be provided with a main body lifting connecting portion that connects the lifting member that lifts the main body frame.
According to this invention, the main body frame can be directly lifted by the lifting member by connecting the lifting member to the lifting connecting portion for the main body, and the block lifting tool can be stabilized in a state where the concrete block is not locked by the locking arm. And can be transported.

  According to the present invention, there is provided a block lifting device that can be configured with a simple structure and that can securely lock the concrete block even if the lifting portion has various thicknesses and can stably transport the concrete block. Can be provided.

The front view of the block lifting tool of the state suspended by the lifting member. Structure explanatory drawing of a block hanging tool. Structure explanatory drawing of a block block hanging tool. The partial expansion exploded perspective view of a block hanging tool. Explanatory drawing which shows the suspension procedure of a concrete block. Explanatory drawing which shows the suspension procedure of a concrete block. The perspective view of the concrete block lifted with a block lifting tool.

An embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view of the block lifting device 10 of the present embodiment in a state of being suspended by a lifting member 500, and FIG. 2A is a left side view of the block lifting device 10 in a state of being suspended by a lifting member 500. FIG. 2B is an enlarged view of the locking arm 21 in FIG. 2A and its surroundings. 3A is an enlarged view of the locking arm 21 provided on the left side of the block suspension 10 in FIG. 1 and its surroundings, and FIG. 3B is an enlarged view of the Z portion of FIG. 3A. FIG. 4 is an exploded perspective view of the block suspension 10 showing only the locking arm 21 provided on the right side of the main body frame 11 and its peripheral portion.

  In the figure, the X direction, the Y direction, and the Z direction indicate the horizontal direction, the depth direction, and the vertical direction of the block lifting device 10 of the present embodiment, respectively. In the figure, Xa is the horizontal inner side, and Xb is the horizontal direction. It shall indicate the direction outside.

  The block lifting tool 10 of the present embodiment is used for lifting and transporting a concrete block 600 having an opening 600A formed in the center in plan view of the top plate 610 as shown in FIG. As shown in FIG. 1 to FIG. 4, the hanger is provided with a main body frame 11 and a locking arm 21 that is locked to the concrete block 600.

  As shown in FIG. 2B, the main body frame 11 is formed in a rectangular cross section that is long in the vertical direction Z with respect to the depth direction Y, and is formed in the center in plan view of the top plate 610 of the concrete block 600. As shown in FIG. 1, the opening 600 </ b> A is formed of a square steel pipe that extends linearly in the lateral direction X.

  A locking arm 21 is pivotally attached to the main body frame 11 at positions spaced at the same interval on the left and right sides with respect to the intermediate portion in the lateral direction X, and a position where the locking arm 21 is pivotally attached (locking arm pivot). At the wearing position P1), as shown in FIGS. 2 (b) and 4, the cylindrical member 12 is placed in the depth direction Y between the surfaces (front and back) of the body frame 11 in the depth direction Y. A main body frame through-hole 13 is formed that extends horizontally and communicates with the internal space of the cylindrical member 12 in the depth direction Y.

  In the present embodiment, as shown in FIG. 1, the locking arm pivot position P <b> 1 includes an inner locking arm pivot position P <b> 1 a that is provided on each of the left and right sides with respect to the intermediate portion in the lateral direction X of the main body frame 11; There are a total of four locations including the outer locking arm pivot position P1b that is located on the laterally outer side Xb from the inner locking arm pivot position P1a. Thereby, although mentioned later, according to the standard of concrete block 600, locking arm 21 penetrates the main body frame formed to penetrate either inner locking arm pivot position P1a or outer locking arm pivot position P1b. It is selectively pivoted by a pivot pin 31 which will be described later inserted into the hole 13.

  At the center of the upper surface 11a of the main body frame 11 in the lateral direction X, as shown in FIG. 1, a main body lifting connection portion 15 for connecting a lifting member 500 to the main body frame 11 is provided. The main body lifting connection portion 15 is formed of a wire rod projecting upward in a substantially pentagonal shape when viewed from the front, and by fixing both end portions in the horizontal direction X of the wire material to the center in the horizontal direction X of the upper surface 11a of the main body frame 11. It is integrally formed. Furthermore, the main body lifting connection portion 15 is engaged with a wire member by a C link 15a that is detachably locked to a master ring 510 provided in a lifting member 500 described later (see FIG. 1).

  The lifting member 500, as shown in FIGS. 1, 2 (a), and FIG. 5 (a) to be described later, is locked to the C link 15a provided in the lifting connection portion 15 for the main body, and the hook of the crane. An annular master ring 510 to be locked (not shown), two chains 520 having one end in the length direction connected to the master ring 510, and the other end side in the length direction of each chain 520, The locking hook 530 is detachably locked to the main body lifting connection portion 15.

  On the other hand, as shown in FIG. 1, the locking arms 21 are arranged symmetrically on each side in the lateral direction X of the main body frame 11, and each locking arm 21 has two plates as shown in FIG. And two plate-like locking arm base materials 211 are provided on both sides in the depth direction Y of the main body frame 11 at a distance slightly larger than the length of the main body frame 11 in the depth direction Y. Are arranged so that the spacer members 212 and 213 are interposed between the locking arm base materials 211 so as to be arranged in an opposed state.

  As shown in FIGS. 2B and 4, the spacer members 212 and 213 include a cylindrical spacer member 212 having a length slightly longer than the length of the main body frame 11 in the depth direction Y, a plate-like spacer member 213, and the like. The cylindrical spacer member 212 is disposed on the laterally outer side Xb of the upper portion of the locking arm 21 by fastening bolts 212a and nuts 212b inserted into the inner space of the cylindrical spacer member 212, and a plate. The spacer member 213 is disposed at a position corresponding to the locking claw 23.

  As shown in FIGS. 2 (b) and 3 (a), the locking arm 21 configured by assembling such elements includes a locking arm body 22 extending in the vertical direction Z, a locking claw 23, A weight portion 24 and an arm lifting connection portion 25 are provided, and a locking arm pivot attachment hole 26 is formed.

  As shown in FIG. 1 and FIG. 3A, the locking claw 23 lifts the edge portion in the horizontal direction X of the opening portion 600 </ b> A formed in the center of the top plate portion 610 of the concrete block 600 in a lifting position 611 ( As shown in FIG. 7, it is provided at the lower part of the locking arm 21 so that it can be locked from the lower surface 610b of the top plate part 610, and is projected from the lower end of the locking arm body 22 to the laterally outer side Xb. Yes.

  More specifically, the lower end portion of the locking arm 21 is laterally outward Xb from the lower ends of the two locking arm base materials 211 as shown in FIGS. 2 (b), 3 (a), and 4. The projecting portions 231 formed by projecting to the projecting portions 231 and the plate-like spacer member 213 interposed between these projecting portions 231 are integrally formed by welding or the like so as to be substantially H-shaped when viewed from the proximal end side in the projecting direction. (See FIG. 2B).

  As shown in FIG. 2B, the locking claw 23 configured as described above is arranged on the upper surface of the protruding portion 231, the plate spacer member 213, and the plate spacer member 213, as shown in FIG. The buffer block 232 is provided. The buffer block 232 is an impact member made of soft resin such as soft vinyl chloride, rubber, or the like, and is integrally fixed to the plate spacer member 213 by fastening bolts 233.

  As shown in FIGS. 1 and 3A, the weight portion 24 is formed so as to protrude from the upper portion of the locking arm main body 22 to the laterally outer side Xb from the locking claw 23. In the upper part, it is provided so as to face the locking claw 23 in the vertical direction Z.

  The portion between the weight portion 24 and the locking claw 23 of the locking arm body 22 is formed so that the length in the vertical direction Z is longer than the thickness of the lifting portion 611 as the locking portion of the concrete block 600. doing.

  As shown in FIGS. 2B, 3A, and 4, the lateral outer end portion 22a and the lateral side at the portion between the locking claw 23 and the weight portion 24 of the locking arm body 22 are arranged. Each of the direction inner end portions 22b is formed in an edge shape extending linearly in the vertical direction Z in a state where the lifting portion 611 is locked by the locking claw 23, that is, in a locking posture Sx described later. Two reinforcing plates 214 and 215 for laying one piece of the locking arm base material 211 in the depth direction Y are provided. Among these, the reinforcing plate 214 shown in FIG. 2B and FIG. 3A provided in the laterally outer end 22a of the locking arm body 22 is in a state where the lifting portion 611 is locked by the locking claw 23. It arrange | positions so that it can contact | abut to the inner edge of the lifting location 611 in a substantially surface contact state.

  As shown in FIG. 1 and FIG. 3A, the arm lifting connecting portion 25 is a cylindrical spacer member at the upper portion of the locking arm 21 so as to be detachably connected to the locking hook 530 of the lifting member 500 described above. It is pivotally attached at the position in the vertical direction Z substantially the same as the location of 212 and on the inner side Xa in the lateral direction of the location.

  As shown in FIG. 4, the arm lifting connection portion 25 includes a shackle 251 having a U-shaped locking portion locked by a locking hook 530 and a pivot pin 252a. The shackle 251 has a base portion 251a. Is pivotally supported between the two locking arm base materials 211 by a pivot pin 252a inserted therethrough, and is pivotally attached to the latch arm 21 by fastening a pivot pin 252a (bolt 252a) and a nut 252b. Yes.

Next, the shape of the locking arm pivot hole 26 will be described with reference to FIG. 3 based on the locking arm pivot hole 26 of the locking arm 21 pivotally mounted on the left side of the main body frame 11 when viewed from the front.
The locking arm pivot attachment hole 26 is formed in a substantially intermediate portion in the vertical direction Z of the locking arm main body 22 so as to be continuous with the locking elongated hole portion 27 and the pivot supporting elongated hole portion 28, and is viewed from the front. It is formed by a long hole having a substantially square shape (a boomerang shape in a frontal standing position).

Here, the locking slot 27 is a slot extending in the up-down direction Z, and the pivot slot 28 is at an angle of about 60 ° with respect to the lateral direction X from the upper end of the locking slot 27. It is a long hole extending obliquely upward inward in the lateral direction X.
The locking arm 21 on the left side of the main body frame 11 is pulled upward and obliquely inward in the lateral direction X with the arm lifting coupling portion 25 as a power point by lifting the lifting member 500. It is formed to extend in substantially the same direction as this pulling direction.

  On the other hand, the locking arm pivot hole 26 formed in the locking arm 21 pivotally attached to the left side of the main body frame 11 is symmetrical to that of the locking arm 21 pivotally attached to the right side of the front view, that is, rear view. It is formed by a long hole having a substantially square shape.

  The locking arm 21 is pivoted by a pivot pin 31 that protrudes to both sides in the depth direction Y at either the inner locking arm pivot position P1a or the outer locking arm pivot position P1b in the main body frame 11. Be supported. FIG. 1 shows a locking arm 21 pivotally attached at the outer locking arm pivot position P1b in the main body frame 11.

  Specifically, at the locking arm pivoting position P1 of the main body frame 11, each of the two locking arm base materials 211 is disposed on each side in the depth direction Y of the main body frame 11 so as to face each other. The respective locking arm pivot holes 26 of the two locking arm base materials 211 and the main body frame through hole 13 formed in the main body frame 11 are arranged in a state where they communicate with each other in the depth direction Y (see FIG. 4). The pivot pin 31 is inserted through the locking arm pivot attachment holes 26 and 26 and the main body frame through hole 13 (see FIG. 2B).

  Accordingly, as shown in FIG. 3A, the locking arm 21 has a locking posture Sx for locking the locking claw 23 to the lower surface 610b of the lifting portion 611, and a locking claw with respect to the locking posture Sx. The pivot frame 31 pivots on the main body frame 11 by pivot pins 31 protruding from both sides in the depth direction Y of the main body frame 11 so as to be pivotable with respect to the tilted posture Sy inclined so that 23 is disposed on the inner side Xa in the lateral direction. Worn.

  In the present embodiment in which each element is configured as described above, the pivot pin 31 is inserted into the main body frame 11 and is pivotally connected to the locking arm pivot hole 26 formed through the locking arm 21. The unit 40 is used (see FIG. 2B). The pivot pin 31 includes a shoulder bolt 31a and a cap nut 31b (see FIG. 4).

  In the block suspension 10 configured as described above, the locking posture Sx is related to the lower surface 610b of the lifting point 611 from the laterally inner side Xa to the outer side Xb by the locking claw 23 as shown by a solid line in FIG. As shown by a two-dot chain line in FIG. 3A, the locking claw 23 is disposed on the inner side Xa in the lateral direction with respect to the locking posture Sx. Thus, for example, it is the attitude | position of the latching arm 21 inclined about 20 degrees-25 degrees.

  Further, as shown in FIG. 3 (b), the upper end portion of the locking arm pivot attachment hole 26 (the pivot support long hole portion 28) is a position where the locking arm 21 in the inclined posture Sy can be pivotally supported. The upper end portion is set at the pivot position Py, and the lower end portion of the locking arm pivot attachment hole 26 (the locking long hole portion 27) is provided in the locking arm 21 in the locking posture Sx by being lifted by the lifting member 500. Since the latching claw 23 is a position where the latching claw 23 is latched to the lifting portion 611 from the lower surface 610b, the lower end portion is set to the latching position Px.

  In this embodiment, the lower end of the locking arm pivot hole 26 is set at the locking position Px. However, depending on the thickness of the lifting portion 611, the locking arm 21 in the locking posture Sx. Since the pivot pin 31 is not necessarily positioned at the lower end portion of the locking elongated hole portion 27 in the locked state in which the locking claw 23 provided to the locking portion locks the lifting portion 611 from the lower surface 610b, the locking position Px Is not limited to the lower end of the locking arm pivot hole 26, and can be set according to the thickness of the lifting portion 611. Specifically, in the locked state of the lifting portion 611 by the locking claw 23, The pivot pin 31 can be set at a position where it is disposed in the locking slot 27.

  Supplementing the pivot position Py described above, the locking arm 21 is not lifted by the lifting member 500 and is pivoted by the pivot pin 31 at the pivot position Py of the locking arm pivot attachment hole 26. In the state, the locking arm 21 is in the inclined posture Sy.

  On the other hand, to supplement the above-described locking position Px, when the locking arm 21 is pivotally supported by the pivot pin 31 at the locking position Px of the locking arm pivot attachment hole 26, the locking arm 21 is The locking posture Sx is more likely to be achieved by lifting by the lifting member 500 as compared to the case where the pivot pin 31 is positioned at the pivot position Py.

  Furthermore, in the state where the pivot pin 31 is disposed at the locking position Px in the locking arm pivot hole 26 (see FIGS. 6C and 6D described later), the main body frame 11 is pivoted on the locking arm. Positioned below substantially the entire weight portion 24 of the hole 26, the portion 11d facing the locking claw 23 on the lower surface 11b of the main body frame 11 contacts the upper surface 610a of the top plate portion 610 of the lifting portion 611. That is, by lifting the locking arm 21, the distance L (see FIG. 3) between the lower surface 11 b of the main body frame 11 and the locking claw 23 is adjusted to the thickness in the vertical direction Z of the lifting point 611.

  In addition, when the pair of locking arms 21 and 21 provided on both sides in the lateral direction X of the main body frame 11 are in the tilted posture Sy (see FIG. 5A described later), the pair of locking arms 21. , 21 are pivoted to the body frame 11 so that the distance in the lateral direction X connecting the tips of the locking claws 23 of the respective locking arms 21 is smaller than the length in the lateral direction X of the opening 600A of the concrete block 600. It is worn.

  An example of lifting the concrete block 600 by a crane using the block lifting tool 10 of the present embodiment described above will be described with reference to FIGS. 5 and 6.

  FIG. 5 is an explanatory view showing a procedure until the locking arm 21 is arranged at a position where the locking arm 21 can be locked to the lifting portion 611 of the concrete block 600. Specifically, FIG. It is explanatory drawing which shows a mode that it mounts on the concrete block 600, FIG.5 (b) is an enlarged view of the X1 part in Fig.5 (a). FIG. 5C is an explanatory view showing a state immediately after the locking arm 21 is changed from the tilting posture Sy to the locking posture Sx, and FIG. 5D is a view of the portion X2 in FIG. 5C. It is an enlarged view.

  FIG. 6 is an explanatory view showing a procedure until the locking arm 21 of the block lifting tool 10 is locked to the lifting portion 611 of the concrete block 600. Specifically, FIG. FIG. 6B is an enlarged view of a portion X3 in FIG. 6A. FIG. 6C is an explanatory view showing a state where the locking arm 21 is locked to the lifting portion 611 of the concrete block 600, and FIG. 6D is an enlarged view of a portion X4 in FIG. 6C. is there.

  However, the concrete block 600 in FIG. 5A, FIG. 5C, FIG. 6A, and FIG. 6C is not shown except for the top plate portion 610, and in the intermediate portion in the depth direction Y. The pivot pin 31 provided in the locking arm pivot hole 26 in FIGS. 5 (b), 5 (d), 6 (b), and 6 (d) It is schematically illustrated with hatching.

  In this embodiment, the crane hooks and the like that are locked to the master ring 510 of the lifting member 500 are not shown, and the two chains 520 provided in the lifting member 500 are illustrated in a simplified line shape. Show. The locking arm 21 is pivotally attached to the outer locking arm pivoting position P1b of the main body frame 11.

  First, as shown in FIG. 5A, the crane hook is locked to the master ring 510 of the lifting member 500, and the main body lifting connecting portion 15 is locked to the master ring 510 via the C link 15a. The block lifting tool 10 is suspended by the crane via the lifting member 500.

  At this time, the two chains 520 provided in the lifting member 500 are not relaxed because the tensile force due to the suspension of the block lifting tool 10 is not applied. That is, since the locking arm 21 is not directly lifted by the lifting member 500, as shown in FIGS. 5 (a) and 5 (b), at the pivot position Py (upper end) of the locking arm pivot attachment hole 26. The pivot pin 31 pivotally supports the tilt posture Sy.

  Then, as shown in FIG. 5A, the block suspension 10 is disposed above the opening 600A formed in the center of the top plate portion 610 of the concrete block 600 in plan view (see the virtual view in FIG. 5A). When the block suspension 10 is gradually lowered straight toward the opening 600A (see the arrow Dd in FIG. 5A), the block suspension 10 eventually becomes the top of the concrete block 600. It will be in the state mounted in the upper surface 610a of the plate part 610. FIG.

  Specifically, when the block suspension 10 is lowered toward the opening 600A of the concrete block 600, the block suspension 10 has at least the locking claw 23 of the locking arm 21 through the opening 600A. The main body frame 11 is placed on both edges in the lateral direction X of the opening portion 600A of the top plate portion 610 of the concrete block 600 so that the body frame 11 straddles the opening portion 600A in the lateral direction X. (See FIG. 5A).

  Subsequently, as shown in FIG. 5C, the master ring 510 and the C link 15a are unlocked, and the master ring 510 of the lifting member 500 is lifted upward by the hook of the crane (FIG. 5C). (See arrow Du in the middle).

  At this time, the two chains 520 provided in the lifting member 500 are subjected to a tensile force due to the lifting of the crane, and extend in a substantially straight line so as to be inclined with respect to the main body frame 11 extending in the lateral direction X. It becomes. Since the locking hook 530 of the lifting member 500 is connected to the arm lifting connecting portion 25 of the locking arm 21, the locking arm 21 is directly lifted via the chain 520 of the lifting member 500.

  As a result, as shown in FIG. 5 (d), the locking arm 21 remains pivoted at the pivot position Py of the latching arm pivot mounting hole 26 by the pivot pin 31, but this pivot pin 31. As shown in FIG. 5 (c), the pivot is pivoted from the tilted posture Sy to the locked posture Sx.

  Subsequently, as shown in FIG. 6A, the master ring 510 is further lifted upward by the hook of the crane. Since the locking arm pivot hole 26 has a long hole shape in the vertical direction Z, when the lifting member 500 is lifted, only the locking arm 21 is lifted with respect to the main body frame 11.

  At this time, the lifting arm 500 is actuated by the lifting force in the obliquely upward direction in the lateral direction X from the lifting member 500 (see arrow F in FIG. 6A). As shown in b), it slides downward and laterally outward Xb from the pivot support position Py of the pivot support slot 28 toward the locking slot 27.

  However, since the laterally outer end 22a of the locking arm 21 is in contact with the inner end of the lifting point 611 in the locked posture Sx, the locking claw 23 is further laterally outward Xb from the locked posture Sx. The claw 23 is disposed on the laterally outer side Xb with respect to the lifting position 611 by lifting the lifting member 500 while maintaining the state of the locking posture Sx without rotating to the side where the hook is disposed. It can be urged in a direction that further tilts to the side (see urging force fb in FIG. 6A).

Subsequently, as shown in FIG. 6C, the master ring 510 is further lifted upward by a crane hook.
At this time, the locking arm 21 is actuated by a lifting force in the laterally inner X direction from the lifting member 500 (see the lifting force F in FIG. 6C). As shown in (d), the locking slot 27 extending in the vertical direction Z is slid downward from its upper end. When the locking arm 21 is lifted by the lifting member 500 until the pivot pin 31 is eventually positioned at the locking position Px (the lower end portion of the locking long hole portion 27 in this embodiment), the block lifting device 10 is 6 (c), the locking claw 23 can be locked to the lifting portion 611 from the lower surface 610b, and the lifting portion 611 is formed by the locking claw 23 and the opposing portion 11d on the lower surface 11b of the main body frame 11. It can be in the state of being sandwiched.

  Although not shown, the concrete block 600 can be lifted and transported safely by the block lifting tool 10 by further lifting the lifting member 500 upward by a crane hook in this state.

  As shown in FIGS. 3 and 6, the block lifting tool 10 of the present embodiment described above includes a main body frame 11 extending in the lateral direction X, and a lifting point 611 of the concrete block 600 on each of the left and right sides of the main body frame 11. A locking arm 21 having a locking claw 23 locked to the lower surface 610b, a locking posture Sx locked to the lower surface 610b of the lifting point 611 by the locking claw 23, and a lateral direction X with respect to the locking posture Sx A locking portion 40 that pivotally attaches the locking arm 21 to the main body frame 11 so as to be pivotable between the inclined posture Sy and is connected to a lifting member 500 that lifts the locking arm 21 to the locking arm 21. The arm lifting connecting portion 25 is provided, and the pivoting portion 40 is lifted by the lifting member 500 via the arm lifting connecting portion 25 to lift the locking arm 21. The locking claw 23 in the state of the locking position Sx, the distance L between the opposing portions 11d of the main frame 11 opposed to the engaging pawl 23 across the lifting portion 611 to be adjusted. Therefore, the concrete block 600 can be locked corresponding to the lifting locations 611 having various thicknesses, and can be moved in a stable state.

  More specifically, when the lifting member 500 is lifted, the pivot pin 31 is moved in the locking arm pivot hole 26, so that the locking claw 23 and the main body frame 11 are moved according to the thickness of the lifting point 611 of the concrete block 600. Since the space | interval L (FIG. 3) with the opposing part 11d can be adjusted, the latching claw 23 can be latched more reliably corresponding to the lifting location 611 of various thickness.

  Further, in the state where the locking claw 23 is locked to the lower surface 610 b of the lifting point 611 of the concrete block 600, the upper surface 610 a of the top plate part 610 of the lifting point 611 can be regulated by the facing portion 11 d of the main body frame 11. The concrete block 600 can be stably moved so that the lifting portion 611 is sandwiched between the locking claw 23 and the opposing portion 11d of the main body frame 11.

  For example, the concrete block 600 is lifted and the locking claw 23 is opposed by one operation of lifting the locking arm 21 by the lifting member 500 without manually adjusting the distance L between the locking claw 23 and the facing portion 11d. Since both adjustment of the space | interval L with the part 11d can be performed, the concrete block 600 can be moved in a stable state easily.

  Moreover, when the locking arm 21 is locked to the lifting position 611, the locking arm 21 is changed from the tilted posture Sy to the locking posture Sx and then locked to the lifting position 611. In this state, the locking arm 21 is inserted into the internal space 600X of the concrete block 600 to a position where the locking arm 21 can be locked to the lifting point 611 through the opening 600A (see FIG. 5A). By changing (refer FIG.5 (c)), the latching arm 21 lifts the latching arm 21 without unexpectedly interfering with the edge (lifting part 611) of the opening part 600A of the concrete block 600. 611 can be reliably and easily locked.

  In addition, according to the above-described configuration, the distance L between the locking claw 23 and the facing portion 11d of the main body frame 11 can be adjusted without adopting a complicated configuration such as a link mechanism, and the number of parts can be reduced. In addition, since it can be realized with a simple structure, it is possible to reduce the weight, and it is possible to provide the block suspension 10 having excellent durability in transporting the heavy concrete block 600 in the field.

  Further, as shown in FIG. 3A, the locking posture Sx is laterally applied to the lower surface 610b of the lifting point 611 by the locking claw 23 provided so as to protrude toward the locking arm 21 toward the laterally outer side Xb. The posture of the locking arm 21 that locks from the inner side Xa to the outer side Xb, and the tilting posture Sy is tilted so that the locking claw 23 is disposed on the inner side Xa in the lateral direction with respect to the locking posture Sx. As shown in FIG. 5B, the locking arm 21 is changed from the tilted posture Sy to the locking posture Sx by lifting the locking arm 21 via the arm lifting connecting portion 25 by the lifting member 500, as shown in FIG. Therefore, the posture change of the locking arm 21 from the tilted posture Sy to the locking posture Sx can also be performed by lifting the locking arm 21 by the lifting member 500. Locking arm 21 is not necessary to lock the locking claw 23 posture portion 611 lifting by changing the can easily lock the locking claw 23 to the lifting position 611.

  Specifically, as described above, the locking arm 21 is lifted from the inclined position Sy that can be inserted into the opening 600 </ b> A of the concrete block 600 by the lifting via the lifting connection portion 25 for the arm by the lifting member 500. The posture can be changed to the locking posture Sx that can be locked (see FIG. 5C), and then the locking arm 21 is further lifted by the lifting member 500 in the locking posture Sx, thereby locking the locking arm 21. The distance L between the claw 23 and the facing portion 11d facing the locking claw 23 across the lifting portion 611 on the lower surface 11b of the main body frame 11 is adjusted, so that the locking claw 23 is moved to the lifting location 611 and its lower surface 610b. (See FIGS. 6A and 6C).

  Further, as shown in FIG. 3 (b), the pivoting portion 40 is engaged with the latching arm pivoting hole 26 as a pivoting recess formed through the latching arm 21, and the latching arm pivoting hole 26. The pivot pin 31 as a pivoting projection, and the pivot position Py where the latch arm 21 can be pivoted in the tilted posture Sy, and the latching claw 23 is lifted by lifting the latch arm 21. Since the pivot pin 31 is formed so as to be slidable between the lower surface 610b and the latch position Px, the pivot pin 31 is pivoted in the latch arm pivot hole 26 as shown in FIG. By disposing at the support position Py, the locking arm 21 can be pivotally supported in the tilted posture Sy at the pivot support position Py.

  Therefore, the locking arm 21 is moved to a locked position where the locking claw 23 can be locked from the lower surface 610b of the lifting point 611 of the concrete block 600 without interfering with the edge of the opening 600A of the concrete block 600. It can be placed smoothly.

  Furthermore, as shown in FIG. 6C, by disposing the pivot support pin 31 at the latching position Px in the latching arm pivot attachment hole 26, the latching arm 21 is lifted, so that the latching posture is changed from the tilted posture Sy. The locking claw 23 of the locking arm 21 whose posture has been changed to Sx can be reliably locked to the lower surface 610b of the lifting point 611.

  Further, as shown in FIG. 3, the arm lifting connection portion in the lateral direction X is set so that the pivot support position Py in the lock arm pivot attachment hole 26 is located with respect to the center of gravity position Pw of the lock arm 21 rather than the lock position Px. As shown in FIG. 5 (a), the pivot pin 31 is disposed at the pivot position Py because the position is shifted to the side having 25, that is, the position shifted to the lateral inner side Xa and the position above the locking position Px. In the state, in a state where the locking arm 21 is not lifted by the lifting member 500, the locking arm 21 can be surely set to the inclined posture Sy.

  Therefore, the locking arm 21 is smoothly arranged so that the locking claw 23 can be locked from the lower surface 610b of the lifting portion 611 of the concrete block 600 without interfering with the edge of the opening 600A of the concrete block 600. It is possible to reliably obtain the above-described effect of being able to.

  On the other hand, in other words, according to the configuration described above, the locking position Px in the locking arm pivot attachment hole 26 has a position shifted to the laterally outer side Xb as compared to the pivot position Py (FIG. 3B). Further, the locking arm 21 is pulled diagonally upward in the lateral direction Xa by the lifting of the lifting member 500 with the arm lifting connecting portion 25 as a power point, so that the locking arm 21 is engaged by the pivot pin 31. In the case of being pivotally supported at the stop position Px, the posture can be actively changed from the tilted posture Sy to the locking posture Sx as compared to the case of being pivotally supported at the pivotal position Py (FIG. 6A). The latching claw 23 can be reliably latched to the lifting portion 611 (see the biasing force fb in FIG. 6C).

  As shown in FIG. 3B, the locking arm pivot hole 26 has a locking slot 27 (locking recess) having a locking position Px and extending in the vertical direction Z (adjustment direction of the interval L). ), And a pivot support hole 28 (pivot recess) extending from the upper end of the locking slot 27 and extending upward inward in the lateral direction X with the arm lifting connection 25. Since it is formed in a generally U shape, as shown in FIG. 5A, when the pivot pin 31 is disposed in the pivot support long hole 28, the locking arm 21 is lifted by the lifting member 600. Even if it is a case where it is set as the state which is not, the latching arm 21 can be made into inclination posture Sy.

  On the other hand, when the pivot pin 31 is disposed in the latching long hole portion 27, when the latch arm 21 is lifted by the lifting member 500, as shown in FIGS. Compared with the case where 31 is arranged in the pivot support long hole portion 28, the posture of the locking arm 21 can be easily changed to the locking posture Sx.

  Therefore, by forming the locking arm pivot attachment hole 26 in a substantially square shape with the locking elongated hole portion 27 and the pivot supporting elongated hole portion 28, the pivot supporting pin 31 can be moved to such a locking position Px. And the pivot position Py can be moved smoothly.

  Further, as shown in FIG. 1 and FIG. 3A, since the weight portion 24 is provided on the portion Xb laterally outside the pivot position Py in the locking arm 21, the gravity center position Pw of the locking arm 21 is provided. Can be decentered to the laterally outer side Xb with respect to the intermediate position in the lateral direction X of the locking arm 21, and the locking arm 21 can be more reliably fixed in a state where the locking arm 21 is not lifted by the lifting member 600. It can be pivoted by the pivot pin 31 in the tilted posture Sy.

  Accordingly, the locking claw 23 can be smoothly arranged so that the locking claw 23 can be locked to the lifting portion 611 of the concrete block 600 from the lower surface 610b without the locking claw 23 interfering with the concrete block 600. It is possible to obtain the above-described effect of being able to perform more reliably.

  Further, as shown in FIG. 6C, the locking claw 23 on the lower surface 11 b of the main body frame 11 in the lifted state in which the pivot pin 31 is disposed at the locking position Px in the locking arm pivot attachment hole 26. 11d comes into contact with the upper surface 610a of the top plate portion 610 of the lifting portion 611, so that the main body frame 11 is placed on the upper surface 610a of the top portion 610 of the lifting portion 611. The lifting location 611 of the concrete block 600 can be pressed by the weight of the frame 11.

  Therefore, in a state where the locking claw 23 is locked to the lower surface 610b of the lifting portion 611, the lower surface 11b of the main body frame 11 is lifted from the upper and lower sides by the facing portion 11d facing the locking claw 23 and the locking claw 23. The portion 611 can be sandwiched.

  That is, not only the pulling force when lifting the locking arm 21 by the lifting member 500 but also the lifting point 611 can be locked by the locking force including the weight of the main body frame 11. The concrete block 600 can be stably lifted while being locked by force.

  Further, as shown in FIGS. 1 and 3A, the arm lifting connecting portion 25 is placed on the opposite side to the lower side of the locking arm 21 with respect to the pivot position Py and on the opposite side. Since the arm lifting connection portion 25 can be disposed so that the distance from the locking claw 23 of the arm lifting connection portion 25 is farther than that of the pivot position Py, the arm lifting connection portion 25 can be locked by the lifting member 500. When lifting 21, it is possible to avoid the possibility that the lifting member 500 interferes with the locking claw 23.

  Furthermore, the arm lifting connecting portion 25 that is a power point when lifting the locking arm 21 is provided with a lower side having a locking claw 23 that acts as an action point with respect to the pivot position Py that is a fulcrum in the locking arm 21. Since it is arranged above the opposite side, when the locking arm 21 is lifted, the locking arm 21 is armed using the principle of scissors with the pivot pin 31 pivotally supported in the locking arm pivot attachment hole 26 as a fulcrum. The lifting force acting on the lifting connection portion 25 can be easily transmitted to the locking claw 23 as a locking force, and an excellent locking force of the lifting portion 611 of the concrete block 600 by the locking claw 23 can be obtained (FIG. 6). (See the locking force fb in (c)).

  Further, as shown in FIG. 1, since the main body lifting connection portion 15 for connecting the lifting member 500 to the main body frame 11 is provided, as shown in FIG. 5A, the main body lifting connection portion 15 is connected to the C link 15a. The main body frame 11 can be directly lifted by the lifting member 500 by being connected to the locking hook 630 of the lifting member 500 via the lifting member 500, and the concrete block 600 is not locked by the locking arm 21. Can be moved stably.

In the correspondence between the configuration of the present invention and the above-described example, the interval adjusting means of the present invention corresponds to the locking arm side pivot hole 26 of this embodiment, and hereinafter, similarly,
The pivot attachment recess corresponds to the locking arm side pivot attachment hole 26 and the main body frame through-hole 13,
The pivoting projection corresponds to the pivot pin 31,
The locking recess corresponds to the locking slot 27,
The pivot support recess corresponds to the pivot support slot 28,
The pivot means corresponds to the pivot section 40,
Although the interval adjustment direction corresponds to the vertical direction Z, the present invention is not limited to the configuration of the above-described embodiment.

  For example, in the present embodiment, the locking arm side pivot hole 26 is formed in the locking arm main body 22 with a generally U-shaped long hole in the front view as shown in FIGS. 3 (a) and 3 (b). However, the locking arm side pivoting hole of the present invention has a pivotal position Py and a locking position Px such as a straight hole, a curved line such as an arcuate shape, or a long hole formed by combining these straight lines and curved lines. The shape is not particularly limited as long as it is a long hole continuously connecting the two.

  Further, in this embodiment, as shown in FIG. 1, the locking arm pivot position P1 is located on the left and right sides of the main body frame 11 at the inner locking arm pivot position P1a and the outer locking arm pivot position P1b. However, the present invention is not limited to this, and the locking arm pivot position of the present invention is not limited to this, and may be configured to have one or three or more positions on the left and right sides of the main body frame 11.

DESCRIPTION OF SYMBOLS 10 ... Block lifting tool 11 ... Main body frame 11d ... Opposing part 15 ... Main body lifting connection part 21 ... Locking arm 23 ... Locking claw 24 ... Weight part 25 ... Arm lifting connection part 26 ... Locking arm pivot attachment hole 27 ... Locking long hole portion 28 ... Pivoting long hole portion 31 ... Pivoting pin 40 ... Pivoting portion 200 ... Concrete block 500 ... Lifting member 610a ... Upper surface 611 ... Lifting point Sx ... Locking posture Sy ... Tilt posture Py ... Pivot position Px ... Locking position

Claims (9)

A body frame extending in the lateral direction;
A locking arm provided with a locking claw that locks to the lower surface of the lifting point of the concrete block on each of the lateral left and right sides of the main body frame;
The locking arm is pivotable between a locking posture in which the locking claw is locked to the lower surface of the lifting portion and a tilting posture inclined in the lateral direction with respect to the locking posture. A pivot attachment means pivotally attached to the
The locking arm is provided with an arm lifting connecting portion that is connected to a lifting member that lifts the locking arm,
When the locking arm is lifted by the lifting member via the arm lifting connecting portion, the locking arm is in the locking posture and the locking claw is sandwiched between the lifting position and the locking claw. A block suspension provided with an interval adjusting means for adjusting an interval between opposing portions of the main body frame. The latch that is locked from the lateral inner side to the outer side on the lower surface of the lifting portion by the latching claw provided with the latching posture so as to protrude toward the outer side in the lateral direction on the locking arm. The posture of the arm,
The inclined posture is the posture of the locking arm that is inclined so that the locking claw is disposed inside the lateral direction with respect to the locking posture,
2. The block lifting tool according to claim 1, wherein the locking arm is configured such that the locking posture is changed from the tilted posture by lifting the locking arm via the arm lifting coupling portion by the lifting member. Said pivoting means;
A pivot recess formed in at least one of the main body frame and the locking arm, and a pivot projection that engages with the pivot recess,
The pivoting projection can be slid between a pivot position where the locking arm can be pivoted in the tilted posture and a locking position where the locking claw is locked to the lower surface of the lifting position by lifting. The block lifting tool according to claim 2, wherein the interval adjusting means is configured by the formed pivot attachment recess. The pivot recess is formed in the locking arm;
The position where the pivot support position in the pivot mounting recess is shifted to the side having the arm lifting connection portion in the lateral direction with respect to the center of gravity position of the locking arm, and the position above the locking position. The block lifting tool according to claim 3. The pivot recess,
A locking recess having the locking position and extending in the interval adjustment direction;
The block lifting tool according to claim 4, wherein the block hanging tool is formed in a substantially U shape with the pivot support recess having the pivot support position and extending from the upper end of the locking recess to the side of the shifted position. The block lifting tool according to claim 4 or 5, further comprising a weight portion on the outer side in the lateral direction with respect to the pivot position in the locking arm. 7. The device according to claim 4, wherein the opposing portion of the main body frame is in contact with the upper surface of the lifting portion in a lifting state in which the pivoting convex portion is disposed at the locking position in the pivoting concave portion. The listed block suspension. The lifting connection for the arm,
The block lifting tool according to any one of claims 4 to 7, wherein the block lifting tool is disposed on a side opposite to a side having the locking claw with respect to the pivot position in the locking arm. The block lifting tool according to any one of claims 1 to 8, further comprising a main body lifting coupling portion that couples the lifting member that lifts the main body frame to the main body frame.

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