JPH1160143A - Sling fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sling fitting which is easily handled, causes no wrong operation, and has high safety, by providing a grabbing aperture control mechanism for fixing grabbing width of grabbing pieces to a lock canceling lever lock piece. SOLUTION: A grabbing aperture control mechanism (b) in which during hoisting a hook receiving ring 13 a hookingly locking groove 20 of a lock piece 21 is engaged and fixed to a fixing pin 15 to fix grabbing width of grabbing pieces 9, 10 is provided for a lock canceling lever 17 and the lock piece 21. When a sling fitting is slinged by the hook receiving ring 13 without pulling the lock canceling lever 17, the grabbing aperture control mechanism (b) keeps right and left grabbing pieces 9, 10 opened with a given opening width, and the sling filling can be easily installed to a grabbed body. In this condition, by pulling the lock canceling lever 17 to sling the sling fitting, the right and left grabbing pieces 9, 10 automatically grab the grabbed body, and the grabbing aperture control mechanism (b) rigidly fixes and locks the grabbing width of the right and left grabbing pieces 9, 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device capable of safely and reliably holding and holding a cylindrical product such as a concrete pile or a concrete fume tube, lifting the product, and transferring it to a desired place. .

[0002]

2. Description of the Related Art Various lifting devices for lifting and transferring cylindrical products such as concrete piles and concrete fume tubes have been proposed and put into practical use. When lifted, the opening width of the left and right holding pieces is locked and held at the specified opening width,
When the lifting tool is set on the clamped body and the retaining holding is released and lifted, the clamping width is automatically locked, and the clamped body can be firmly clamped and transported. An object of the present invention is to provide a lifting device that can be easily changed to a holding width and can exert the same operation and effect as described above.

[0003]

The gist of the present invention will be described with reference to the accompanying drawings.

A clamping width adjusting bolt 2 is wrapped around a clamping width adjusting hole 1 'at the center top of a triangular main body plate 1 opposed to the front and rear at a predetermined interval, and is fastened. Close the curved holding arm body pivots 3 and 4 closer to each other, and
A left and right pair of left and right curved holding arms, with a left lower end extending downward with the curved side facing inward and the other end extending rightward with the left curved holding arm body pivot shaft 3 therebetween. The middle of the body 5 is pivotally connected, and the right lower end is vertically attached to the right curved clamping arm pivot shaft 4 with the curved side facing inward so as to face the left curved clamping arm 5. A pair of right and left curved holding arms 6, which are extended with their ends directed to the left, are pivotally connected in the middle of the pair of right and left curved holding arms 6.
Each lateral groove 5 '
6 'and a slide vertical groove 7 drilled below the holding width adjusting hole 1' of the main body plate 1 are connected by a center bolt 8, and held between the front and rear lower end portions of the left and right curved holding arms 5, 6. Piece 9 ・ 10
And the lower ends of a pair of left and right suspension links 11 and 11 are pivotally attached to the left and right other ends of the left and right curved holding arms 5 and 6 with connecting pins 12 and 12, respectively. A lifting device A having a link mechanism a formed by axially connecting the upper end portions of 11 and 11 with a center pin 14 provided with a hook receiving ring 13, wherein the lifting device A is provided in the middle of the right or left front and rear suspension links 11. A locking pin 15 is provided, and a base of an unlocking lever 17 having a hook-shaped guide groove 16 formed therein is pivotally mounted on the locking pin 15, and a clamping width adjustment piece is attached to the right or left curved clamping arm body pivot shaft 4. The base of the body 18 is pivotally connected, and the lower end of the opening regulating rod 19 having its upwardly projecting length adjusted is fixed to the holding width adjusting piece 18, and the projecting end of the opening regulating rod 19 is fixed. Lock piece 21 with a locking groove 20 hooked on the side end face
The lock piece 21 is inserted between the front and rear plates of the lock release lever 17, and the front and rear ends of the slide pin 22 erected near the top of the lock piece 21 are guided into the hook-shaped guide groove 16. A tension spring 23 is stretched between the center bolt 8 and the opening regulating rod 19 at an upper portion thereof, and a hook receiving ring 13 is provided.
When the lifting tool A is hung, the crossing step D between the projecting end of the opening regulating rod 19 and the lower end face of the lock piece 21 abuts on the locking pin 15 to lock the left and right holding pieces 9. When the opening width of 10 is maintained at a predetermined opening width, the other end of the lock release lever 17 is pulled outward to release the intersecting step D from the locking pin 15 and the hook ring 13 is hooked when the hook ring 13 is lifted. A lifting mechanism characterized in that a locking opening degree control mechanism (b) for locking the holding width of the holding pieces (9, 10) by locking the locking groove (20) into the locking pin (15) is provided on the unlocking lever (17) and the locking piece (21). It is related to the tool.

A support shaft 32 is erected at the center lower portion of the main body plate 1, a center portion of a right-pending arm 33 is pivotally mounted on the support shaft 32, and a right end portion is hanged downward to form a left curved other end portion. Is extended to the upper left, the central portion of the left hanging arm 34 is pivotally attached to the support shaft 32 in opposition to the right hanging arm 33, and the other end of the left hanging downward is attached to the other end of the right curved end. A right link 35 and a right hanging arm extend between the center bolt 8 and the right end of the right bending other end of the left hanging arm 34 extending upward and to the right.
The lifting device according to claim 1, wherein a lifting mechanism (37) is formed by pivotally connecting a left link (36) between the tip of the other left curved end of the 33 and the center bolt (8).

A width determining plate 24 is provided at the front center of the front body plate 1, and the width of the left and right holding pieces 9 and 10 is vertically spaced at a predetermined distance from the upper center of the width determining plate 24. A plurality of selective holding width adjusting holes 25 for setting the position and a predetermined sliding vertical groove 26 of a predetermined length thereunder are formed, and the opening regulating rod 19 is formed.
A plurality of selective holding width adjusting grooves 27 for setting the holding width of the left and right holding pieces 9 and 10 corresponding to the plurality of selective holding width adjusting holes 25 at predetermined intervals are provided on the outer periphery of the lower end portion of the lower case. Then, select the desired holding width adjusting groove 27 of the opening regulating rod 19, and fit this groove with the bolt hole of the holding width adjusting piece 18 and fix it with the adjusting bolt 28, corresponding to the selected holding width adjusting groove 27. Select the holding width adjustment hole 25 of the width determining plate 24, align the adjustment hole with the holding width adjustment hole 1 ', connect the width determining plate 24 to the main body plate 1.1 with the holding width adjustment bolt 2, and slide. A holding opening setting mechanism (c) for setting the holding width of the left and right holding pieces (9, 10) by connecting the vertical groove (7) and the selective holding width adjusting groove (27) with a center bolt (8). It relates to the described lifting device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings, which are examples of embodiments, showing the functions and effects.

The first embodiment of the present invention will be described.

When the wire rope is hooked on the hook ring 13 without the lock release lever 17 being pulled, and the wire rope is hung by the hook body of the hoisting device, the hoisting tool A moves right and left due to its own weight. The curved holding arms 5 and 6 are rotated about the curved holding arm pivots 3 and 4 to form left and right holding pieces 9.
The opening width of the opening 10 becomes narrower and the interval between the connecting pins 12 and 12 tends to close and rotate inward, but the holding opening control mechanism b causes the opening end of the opening regulating rod 19 and the lower portion of the lock piece 21 to be closed. As shown in FIG. 5, the step D crossing the end face abuts on the locking pin 15 and is locked, so that the distance between the curved holding arm body pivot shaft 4 and the locking pin 15 does not change, and the left and right suspension links are not changed. 11 and 11 cannot be closed and rotated inward, so that the opening width of the left and right holding pieces 9 and 10 is maintained at a predetermined opening width and does not change.

In this state, when the lifting tool A is set on the holding member P and the other end of the unlocking lever 17 is pulled outward, the upper portion of the unlocking lever 17 pivots the locking pin 15 from the state shown in FIG. As a result, the slide pin 21 of the lock piece 21 is guided in the hook-shaped guide groove 16 about the curved holding arm body pivot shaft 4 as a result, as a result, as a result, The cross step D is separated from the locking pin 15. When the lifting device A is lifted in this state, the connecting pins 12 and 12 of the left and right horizontal links 11 and 11 are rotated by the link mechanism a such that the connecting pins 12 and 12 are respectively pulled up around the central pin 14 as axes.
The other ends of the curved holding arm members 5 and 6 are rotated by the lifting rotation of 12 and 12 so that the other ends of the bending and holding arm members 5 and 6 can be pulled upward around the left and right curved holding arm body pivot shafts 3 and 4. The guide 8 ascends inside the left and right lateral grooves 5 'and 6' and the slide vertical groove 7 so that the right and left holding pieces 9 and 10 firmly hold the held body P so as to hold the held body P firmly.

At the same time, the locking pin 15 rises due to the rise of the horizontal link 11, and the hook-shaped guide groove 16 of the lock release lever 17 uses the slide pin 22 of the lock piece 21 as a guide.
The locking groove 20 of the lock piece 21 is inserted into the locking pin 15 so that the distance between the curved holding arm body pivot shaft 4 and the locking pin 15 is automatically locked at that distance. In addition, since the hooking locking groove 20 continues to lock the locking pin 15 by the urging force of the tension spring 23 stretched between the center bolt 8 and the opening regulating rod 19, the left and right holding pieces 9 The left and right holding pieces 9 and 10 continue to maintain the desired holding width as long as the holding width is locked to the desired holding width, and the locking pin 15 is fitted and locked in the hook locking groove 20. In this state, the holding body P is moved to a desired position by the lifting device.

When the lifting tool A is detached from the holding member P, as shown in FIG. 8, when the other end of the lock release lever 17 is pulled outward, the hook-shaped guide groove 16 rotates outward with the locking pin 15 as an axis. This rotation causes the slide pin 22 to rotate outwardly about the right curved holding pivot shaft 4 using the hook-shaped guide groove 16 as a guide, so that the hook lock groove 20 is separated from the lock pin 15. When the hook receiving ring 13 is lowered and the lower end surface of the main body plate 1 is brought into contact with the upper surface of the holding body P, the connecting pins 12 of the left and right horizontal links 11, 11 are pivoted about the central pin 14 by the link mechanism a. Lock pins as they open outward and rotate and descend
15 descends while abutting on the inner end face of the lock piece 21 and abuts on the cross step D and is locked at that position by the urging force of the tension spring 23. As a result, the curved holding arm body pivot shaft 4 Stop pin 15
The distance between them is fixed, and during this operation, the left and right holding pieces 9 and 10 that have been gradually opening the opening width by the operation opposite to the above with the left and right curved holding arm pivots 3 and 4 as axes. At this point, the opening width is held at the predetermined opening width.

As described above, when the lifting device A is lifted, the left and right opening widths are locked and held at a predetermined opening width by the release control mechanism b provided on the lock release lever 17 and the lock piece 21 when the lifting device is lifted. When the lock release lever 17 is pulled and lifted after being set on the holding body, the holding width is automatically locked by the holding opening control mechanism b, so that the holding body P can be firmly held and transported. .

A second embodiment will be described.

The lifting member A is suspended without the lock release lever 17 being pulled, and the holding member P is held in a state where the opening width of the left and right locking pieces 9 and 10 is held at a predetermined opening width by the holding and opening control mechanism b. When lifting tool A is set on the top, the lifting mechanism
Since the left and right vertical other ends of the right and left vertical arms 34 and 33 of the 37 abut against the outer periphery of the held body P, the lifting tools are used so that the left and right vertical other ends uniformly contact the outer circumference of the held body P. After fixing the holding position of A, pull the lock release lever 17 to lift the lifting tool A.
When the center bolt 8 is lifted, the left and right lateral grooves 5 '
The right and left holding pieces 9 and 10 hold the body P to be held while the guide 6 'and the slide vertical groove 7 are ascending, and the right and left holding pieces 9 and 10 are locked to a predetermined holding width by the holding opening degree control mechanism b. The object to be clamped P is clamped between them.

At this time, when the guide of the center bolt 8 rises, the other ends of the left and right vertical arms 34 and 33 of the lifting mechanism 37 rotate downward and inward about the support shaft 32 to rotate the clamped member P. The holding object P is pressed against the left and right diagonally above the holding object P, and the left and right holding pieces 9 and 10 hold the holding object P from above and below the right and left diagonally below the holding object P.
The held object P is held by the left and right vertical arms 34 and 33 and the left and right holding pieces 9 and 10 in a very desirable holding posture.

A third embodiment will be described.

The lifting tool A is lifted, and the lock release lever 17 is lifted.
This other end is引動rightward, for example by selecting the lowest selection pinching width adjustment groove 27 ₃ were Nyo設the lower end of the opening regulating lever 19 of the clamping opening setting mechanism c as shown in FIG. 9 When the groove is aligned with the bolt hole of the holding piece 18 and fixed with the adjusting bolt 28, the lifting length of the lifting tool A is adjusted and fixed to the holding width adjusting piece 18 with the longest upwardly projecting length. Lock piece 21 at protruding end
Thus, the opening regulating rod 19 provided with.

Next, as shown in FIG.
_3. Select the lowermost clamping width adjusting hole 253 of the width determining plate 24 of the clamping opening setting mechanism c corresponding to ₃ and select this hole and the clamping width adjusting hole 1 'of the main body plate 1 with the clamping width adjusting bolt. 2, the distal ends of the left and right hanging arms 34, 33 project from the state shown in FIG.
The lifting tool A having the narrowest holding width as shown in FIG.

As described above, when the lock release lever 17 is returned to the original state and the lifting device A is lifted, the crossing step D is brought into contact with the locking pin 15 by the holding opening degree control mechanism b due to the weight of the lifting device itself. Because it is in contact and locked, the left and right holding pieces 9
The opening width of 10 is maintained at a predetermined opening width (the narrowest opening width for the lifting device A).

In this state, the lifting tool A is set on the holding member P corresponding to the holding width of the lifting tool A, and the other end of the lock release lever 17 is pulled outward to hold the opening control mechanism b.
In this state, the lifting tool A is pulled up by the locking pin 15 and the lifting member A is lifted up, and the holding member P is held by the left and right holding pieces 9 and 10 so as to hold it. At the same time, the desired holding width is automatically locked by the holding opening control mechanism b, and the holding width is firmly fixed.

At this time, the center bolt 8
When the guide rises, the hanging ends of the left and right hanging arms 34 and 33 of the lifting mechanism 37 rotate downward and inward about the support shaft 32, so that the object P is held by the left and right hanging arms 34 and 33. Left and right diagonally upper pressing contact force, left and right holding pieces 9.
The gripping force from the right and left diagonally below by 10 causes the gripping in a very desirable gripping posture.

Further, when it is desired to change the clamped width other clamping width, select the second selection pinching width regulating groove 27 ₂ from the bottom, for example Figure 9 of the opening regulating lever 19 of the clamping opening setting mechanism c the groove and the clamping piece body 18 and fixed with the adjusting bolt 28, by selecting the second selectable clamping width adjusting holes 25 ₂ from the bottom of width decided plate 24 corresponding to the selected clamping regulating groove 27 ₂ the hole and clamping By connecting the width adjusting hole 1 'with the clamping width adjusting bolt 2, a lifting device having a slightly wider clamping width than the narrowest clamping width is obtained as the lifting device A.

As described above, the width determining plate 24 of the lifting device A
In addition, a plurality of holding width adjusting holes 25 for setting the holding width of the left and right holding pieces 9 and 10 corresponding to the holding width of the plurality of holding bodies P are formed, and the left and right holding pieces 9 are correspondingly formed. A plurality of selectable width adjustment grooves 27 for setting the 10 widths are provided around the opening regulating rods 19, and these are intentionally selected to provide a plurality of predetermined widths. Tool A is obtained, the opening width of the left and right holding pieces 9 and 10 is held at a predetermined opening width when lifted, and the holding width of the left and right holding pieces 9 and 10 is held when the held body P is held. It is firmly fixed and locked.

At the same time, by connecting the selected holding width adjusting hole 25 and the holding width adjusting hole 1 'with the holding width adjusting bolt 2, the left and right vertical arms 34, 33 of the lifting mechanism 37 as a pantograph mechanism are connected. The initial set position changes in accordance with the size of each held object P, and when the object is lifted with the lifting device A, the hanging ends of the left and right hanging arms 34 and 33 move the held object P from diagonally right and left upward. Since the left and right holding pieces 9 and 10 hold the held body P from the lower left and right sides of the held body P corresponding to the size of each held body P, the holding pieces 9 and 10 are held in a pressed state. Since the holding body P is held in the most desirable ideal state, the lifting tool A can firmly hold a plurality of holding widths with one unit.

[0026]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a lifting device capable of lifting and holding three types of concrete fume pipes of different diameters which are suitable for the present invention.

An embodiment according to claims 1 and 2 will be described.

A distance piece is interposed in a clamping width adjusting hole 1 'at the center top of a triangular main body plate 1 which is opposed to the front and rear at a predetermined interval, and a clamping width adjusting bolt 2 is wrapped around the wing nut 31. Then, the curved holding arm body pivot shafts 3 and 4 are fastened to the left and right end portions of the main body plate 1, and the left and right curved clamping arm body pivot shafts 3 between the front and rear body plates 1 are bent. A pair of left and right curved front and rear left and right holding arms 5 extending vertically with the left side downward and the other end extending to the right with the side facing inward. The lower end of the right side is erected on the mounting shaft 4 with the curved side facing inward and facing the curved holding arm 5 inside the left curved holding arm 5, and the other end extends leftward. The right and left pair of right and left holding arms 6 are pivotally connected. At the center of the left and right curved holding arms 5 and 6, respective lateral grooves 5 ′ and 6 ′ are formed so as to face left and right, and a slide vertical groove 7 formed below the holding width adjusting hole 1 ′ of the main body plate 1. With the distance piece interposed and connected with the center bolt 8, and the left and right curved holding arms 5 and 6
The left and right holding pieces 9 and 10 formed by welding the brackets to be fitted to the front and rear curved holding arms 3 and 4 are attached to the back of the angle pieces with the angle pieces facing inward between the front and rear lower ends. On the left and right ends of the left and right curved holding arms 5 and 6 with the left and right suspension links 11 and 11 on the other end. Of the left and right suspension links 11
・ Central pin 14 with hook receiving ring 13 attached to upper ends of 11
To form the link mechanism a to constitute the lifting tool A.

The right or left front and rear suspension links 11
In the middle of the drawing (the right suspension link 11 in the figure), a locking pin 15 is installed, and the base of the unlocking lever 17 in which a hook-shaped guide groove 16 is formed in the locking pin 15 with the distance piece interposed The base of the clamping width adjusting piece 18 is pivotally attached to the right or left (right side in the figure) curved clamping arm body pivoting shaft 4, and the length of the clamping width adjusting piece 18 protrudes upward. Adjustable opening rod 19
The opening of the opening restricting rod 19 has a two-part structure in which a hooking locking groove 20 is formed on the left end face of the projecting end of the opening control rod 19 so that the body of the locking pin 15 is fitted and locked. The lock piece 21 is fixed, and the lock piece 21 is inserted between the front and rear plates of the lock release lever 17 so that the front and rear ends of the slide pin 22 installed near the top of the lock piece 21 are inserted into the hook-shaped guide groove 16. And a tension spring 23 is stretched between the center bolt 8 and the opening regulating rod 19 at an upper portion thereof.
The holding width adjusting piece 18, the opening regulating rod 19, and the lock piece 21 constitute a holding opening control mechanism b. Reference numeral 17 'in the figure denotes a finger hook pin used to pull the lock release lever 17 rightward about the locking pin or to return to the old state.

A support shaft 32 is erected at the center lower portion of the main body plate 1, and a central portion of a right and left arm 33, which is a set of two front and rear members, is pivotally mounted on the support shaft 32, and a right end portion is vertically mounted downward. The other end of the left curve extends upward and to the left, and a distance piece is interposed on the support shaft 32 between the front and rear right hanging arms 33 so as to face the right hanging arm 33 to form a two-piece structure. The central part of the left hanging arm 34 is pivotally attached, the left end is hung downward, the other end of the right bending arm extends upward and to the right, and the tip of the right bending other end of the left hanging arm 34 and the center A pantograph-shaped lifting mechanism in which a left link 36 is pivotally connected between the center bolt 8 and a right link 35 and a tip of the left curved other end of the right hanging arm 33, which is a pair of front and rear pieces, between the bolts 8.
Construct 37.

When the lifting device A is suspended by the hook receiving ring 13,
Due to the weight of the lifting device A, the left and right curved holding arms 5 and 6 rotate about the curved holding pivot shafts 3 and 4 so that the opening width of the left and right holding pieces 9 and 10 is reduced, and the connecting pins 12 and 10 are connected. Although the interval of 12 attempts to close and rotate inward, the crossing step D between the projecting end of the opening regulating rod 19 and the lower end surface of the lock piece 21 is locked by the pinching opening control mechanism b. 15 and the distance between the curved holding arm body pivot shaft 4 and the locking pin 15 does not change, and the left and right suspension links 11 cannot be closed and rotated inward. The opening width of the holding pieces 9 and 10 is maintained at a predetermined opening width and does not change, and the opening regulating rod 19 is a tension spring.
23. The urging force always makes contact with the cross step D, and the opening width does not change even when the lifting tool A is moving.

In this state, when the lifting tool A is set on the holding body P (for example, a concrete fume pipe), the left and right hanging ends of the left and right hanging arms 34 and 33 of the lifting mechanism 37 are held by the holding body. Since the pin is in contact with the outer periphery of P, the holding position of the lifting tool A is adjusted so that the left and right hanging ends are uniform, and then the finger-holding pin 17 ′ of the unlocking lever 17 is pulled rightward. As shown in FIG. 6, the upper portion pivots rightward with the locking pin 15 as an axis. With this rotation, the slide pin 21 of the lock piece 21 guides and moves in the hook-shaped guide groove 16, and the lock piece 21 is opened. The right-handed pivoting arm 4 pivots to the right through the regulating rod 19 and the cross step D is separated from the locking pin 15 as a result. When the hook suspension ring 13 is lifted in this state, the link mechanism a rotates so that the connection pins 12 of the left and right horizontal links 11 can be pulled inward around the center pin 14, respectively. Arms 5 and 6 curved by turning up 12
Is pivoted about the left and right curved holding arm body pivot shafts 3 and 4 so that the center bolt 8 is actuated so that the center bolt 8 moves to the left and right lateral grooves 5 'and 6' and the slide vertical groove 7. The guide is raised in the inside, and the left and right holding pieces 9 and 10 are firmly held so as to hold the held body P firmly.

At this time, as the guide of the center bolt 8 rises, the left and right vertical lower ends of the left and right vertical arms 34 and 33 of the pantograph-shaped lifting mechanism 37 protrude from the lower surface of the main body plate 1 to hold the holding member P. The left and right holding pieces 9 and 10 are pressed against the outer peripheral surface of the
The holding member P is held in an ideal holding posture because the outer peripheral surface of the holding member P is held by the left and right diagonally downward.

At the same time, the locking pin 15 rises due to the rise of the horizontal link 11, and the hook-shaped guide groove 16 of the lock release lever 17 rises using the slide pin 22 of the lock piece 21 as a guide, and the lock piece 21 The hook locking groove 20 is fitted into the locking pin 15 so that the distance between the curved holding arm body pivot shaft 4 and the locking pin 15 is automatically locked and fixed at that distance, and the center bolt 8
-Since the engaging groove 20 continues to lock the locking pin 15 by the urging force of the tension spring 23 provided between the upper part of the opening regulating rod 19, the holding width of the left and right holding pieces 9 and 10 is predetermined. The holding member P is locked by the holding width and is kept in this state, so that the holding member P can be moved to a desired place by the lifting device.

When removing the lifting device A from the holding member P,
When the finger-holding pin 17 ′ of the lock release lever 17 is pulled to the right outside, the hook-shaped guide groove 16 is turned to the right outside around the locking pin 15, and this rotation causes the slide pin 21 to turn the hook-shaped guide groove 16.
As it turns to the right with the guide
20 is separated by locking pin 15. The hook receiving ring 13 is lowered, and the right and left hanging ends of the left and right hanging arms 34 and 33 projecting below the lower end surface of the main body plate 1 are brought into contact with the upper surface of the clamped body P to lift the lifting member A. Is lowered, the linking mechanism a causes the connecting pins 12, 12 of the left and right horizontal links 11, 11 to pivot outwardly around the center pin 14 while rotating, and the locking pin 15 is lowered to the left end face of the lock piece 21. Descend while contacting with
, And is locked at that position by the urging force of the tension spring 23. As a result, the distance between the bending holding arm body pivot shaft 4 and the locking pin 15 is fixed, and the left and right bending holding is performed during this operation. The arms 5 and 6 are pivoted about the left and right curved holding arms 5 and 6 so that the other ends of the left and right curved holding arms 5 and 6 are pushed down. Are guided down the left and right lateral grooves 5 'and 6' and the slide vertical groove 7 so that the opening width of the left and right holding pieces 9 and 10 is maintained at a predetermined opening width. The left and right vertical lower ends of the left and right vertical arms 34 and 33 of the lifting mechanism 37 gradually rise, and the lifting tool A is set on the upper surface of the holding member P in a stable state.

An embodiment according to claim 3 will be described.

A vertically long oval-shaped width determining plate 24 is attached to the center front portion of the front body plate 1, and the left and right holding pieces 9 are arranged at predetermined intervals in the vertical direction at the upper center of the width determining plate 24.
A plurality of selection width setting holes 25 for setting the 10 widths and a predetermined vertical slide groove 26 having a predetermined length are formed below the holes 25, and the plurality of selection lengths are formed on the outer periphery of the lower end of the opening degree regulating rod 19. A plurality of selective holding width adjusting grooves 27 for setting the holding width of the left and right holding pieces 9 and 10 corresponding to the holding width adjusting holes 25 are provided at predetermined intervals. In the illustrated embodiment, three types of concrete fume pipe adjusting holes having different diameters are drilled in order from the top in the selective width adjusting holes 25 to be drilled in the width determining plate 24. Selective clamping width adjusting grooves 27 at the lower end of the degree regulating rod 19 are provided in order from the top to accommodate adjusting grooves applicable to three types of diameters, large, medium, and small.

Desired selection holding width adjusting groove 27 of opening regulating rod 19
And adjust the groove to the bolt hole of the holding width adjusting piece 18 and fix it with the adjusting bolt 28.Select the selecting holding width adjusting hole 25 of the width determining plate 24 corresponding to the selecting holding adjusting groove 27. Align this adjustment hole with the holding width adjustment hole 1 'and connect the width determining plate 24 to the main body plate 1.1 with the holding width adjustment bolt 2.
A slide opening setting mechanism c for setting the holding width of the left and right holding pieces 9 and 10 by connecting the slide vertical groove 7 and the selective holding width adjusting groove 27 with a center bolt 8 is provided.

[0039] Figure 1 of the illustrated embodiment, FIG. 3, when 4 assembled by selecting selects clamping width adjusting holes 25 ₁ and selective pinching width regulating grooves 27 ₁ as a large concrete Hume pipe clamping the top diameter illustrate, Figure 9 illustrates the case where the assembled by selecting selects clamping width adjusting holes 25 ₃ and the selected clamping width adjusting groove 27 ₃ for the small concrete Hume pipe clamping the top diameter.

The operation and effect as described in the first embodiment can be obtained in any combination.

As described above, the width determining plate 24 of the lifting device A
A plurality of selective holding adjustment holes 25 ₁ for setting the holding width of the left and right holding pieces 9 and 10 in accordance with the holding width of the plurality of holding bodies P
··· _{2 2} · 25 ₃ · · · and a plurality of selective holding width adjusting grooves 27 for setting the holding width of the right and left holding pieces 9 · 10 corresponding to the hole
By Nyo設_1, 27 _2, 27 _3, ... in the opening regulating lever 19, the lifting device A having a desired plurality of pinching width is obtained, also lifting was by assembling select them Occasionally, the left and right holding pieces 9 and 10 are controlled by the holding opening control mechanism b.
Is held at a predetermined opening width, and the holding member P
Is held, the holding width of the left and right holding pieces 9 and 10 is firmly fixed and locked by the operation of the holding opening control mechanism b.

At the same time, when the selected holding width adjusting hole 25 and the holding distance adjusting hole 1 'are connected by the holding width adjusting bolt 2, the initial sets of the left and right vertical arms 34 and 33 of the lifting mechanism 37 are respectively set. It changes in accordance with the size of the holding body P, and when it is lifted by the lifting device A, the hanging ends of the left and right hanging arms 34 and 33 abut the holding body P in an obliquely right and left upwardly pressed state. The holding pieces 9 and 10 hold the held body P in such a manner as to hold the held body P obliquely from the lower right and left corresponding to the size of each held body P, so that the held body P is held in the most ideal state. Therefore, the lifting device A can securely hold a plurality of holding widths with one unit.

In the present embodiment, the triangular main body plates 1 are arranged in front and back at a predetermined interval, and the left and right curved holding arms 5 are provided.
6, the left and right suspension links 11 and 11 are configured to be paired in front and rear, respectively, and the left and right hanging arms 34 and 35 and the left and right links 36 and 35 are configured to be paired in front and rear, respectively. The same operation and effect can be obtained even if a pair is configured.

[0044]

According to the present invention as described above, according to the first aspect of the present invention, when the lifting device is lifted by the hook ring without pulling the lock release lever, the right and left holding members are held by the holding opening control mechanism. The opening width of the piece is held at the specified opening width, and the lifting tool can be easily set on the clamped object. In this state, when the lock release lever is pulled and the lifting tool is lifted, the left and right holding pieces are automatically Since the clamped body is clamped and the clamping width of the left and right clamping pieces is firmly fixed and locked by the clamping opening degree control mechanism, the weight of the clamped body is increased like a conventional lifting device of this type. If it is too light, the clamping force will be insufficient and the clamped body will not slide down.In addition, even if the lifting tool or clamped body comes into contact with other objects during the lifting operation, the clamped piece will be securely locked. Object may fall off the lifting device No malfunction is easy to handle is not, the lifting member to exert a practical effect was highly secure soo.

In the second aspect of the present invention, since the lifting device is provided with a lifting mechanism, when the object to be clamped is lifted by the lifting device, the hanging ends of the left and right vertical arms are held by the object to be clamped. The outer periphery of the body is pressed from the upper left and right diagonally in the pressed state, and the left and right holding pieces are held so as to hold the outer circumference of the held body from the lower left and right sides, so that the held body is held in the most ideal state It becomes a very safe lifting tool.

According to the third aspect of the present invention, since a holding opening setting mechanism is provided in the holding opening control mechanism for the lifting tool, a hanging tool having a plurality of holding widths can be obtained.
When the lifting tool is lifted for each desired holding width, the left and right holding widths are respectively held, and when the held object is held, the holding widths of the left and right holding pieces are firmly fixed and locked. When the selected clamping width adjustment hole and the clamping width adjustment hole are connected with the clamping adjustment bolt, the initial set of the left and right vertical arms of the lifting mechanism changes according to the size of each clamped object, and the lifting tool is used. In each case, the hanging ends of the left and right hanging arms come into contact with the outer periphery of the object to be pressed from diagonally above left and right, and the left and right holding pieces are the size of the object to be held. In order to hold the outer circumference of the object to be held diagonally from the lower left and right, the object to be held is held in the most ideal condition, which is very convenient and safe. It becomes a highly practical lifting tool.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention.

FIG. 2 is a partially cutaway front view of an embodiment of the present invention.

FIG. 3 is a front view showing a use state of the embodiment of the present invention, showing a state in which a lifting device is suspended on a clamped body.

FIG. 4 is a front view showing a state where the object to be clamped is held and lifted by the lifting tool.

FIG. 5 is a partially cutaway front view showing a state of the holding opening mechanism when the lock release lever is not pulled in the embodiment of the present invention.

FIG. 6 is an explanatory front view, partially cut away, showing the operation of the holding opening control mechanism when the lock release lever is pulled.

7 is a partially cutaway front view showing the operation of the holding opening control mechanism when the lifting tool is lifted in the state of FIG. 6 and the left and right holding pieces hold and hold the held body. .

FIG. 8 is a holding opening mechanism for lifting the clamped object by the lifting device of FIG. 7, transferring the clamped object to a desired position, rejecting the clamped object, and then pulling the lock release lever to remove the lifting device from the clamped object. FIG. 7 is an explanatory front view showing the movement of the vehicle.

FIG. 9 is a front view showing a state in which the clamped body is clamped and lifted by the clamp opening setting mechanism according to the embodiment of the present invention, with the clamping width of the left and right clamping pieces being minimized.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body plate 1 'Holding width adjustment hole 2 Holding width adjusting bolt 3 Curved holding arm pivot shaft (left) 4 Curved holding arm pivot shaft (right) 5 Left curved clamping arm 5' lateral groove 6 Right curved clamping arm Body 6 'Horizontal groove 7 Slide vertical groove 8 Center bolt 9 Holding piece (left) 10 Holding piece (right) 11 Suspension link 12 Connecting pin 13 Hook receiving ring 14 Center pin 15 Locking pin 16 Hook-shaped guide groove 17 Lock release lever 18 Locking width adjustment piece 19 Opening regulating rod 20 Hook locking groove 21 Lock piece 22 Slide pin 23 Tensile spring 24 Width determining plate 25 Selectable locking width adjustment hole 26 Predetermined slide vertical groove 27 Selectable locking width adjustment groove 28 Adjusting bolt 32 Support shaft 33 Right hanging arm 34 Left hanging arm 35 Right link 36 Left link 37 Lifting mechanism A Lifting tool a Link mechanism b Clamping opening control mechanism c Clamping opening setting mechanism D Cross step

Claims (3)

[Claims] 1. A clamping width adjusting bolt is wrapped around a clamping width adjusting hole at the center top of a triangular main body plate which is opposed to the front and rear at a predetermined interval and fastened, and curves toward the left and right ends of the main body plate. Fasten the holding arm pivot axis, hang the left side lower end with the curved side facing inward, and hang the other end right on the left curved clamping arm pivot axis between the front and rear body plates. A pair of front and rear left bending clamp arms extending toward the center are pivotally connected, and the curved side faces inward in a state facing the left bending clamp arm on the right bending clamp arm pivot axis. The right lower end is vertically extended and the other end is extended to the left. The middle of a pair of right and left curved holding arms is pivotally connected, and the center of the left and right curved holding arms is left and right opposed. Each lateral groove drilled in the state and the slide vertical groove drilled below the clamping width adjustment hole of the main body plate are connected with a center bolt, and the front and rear lower ends of the left and right curved clamping arms A pair of left and right suspension links are mounted on the left and right ends of the left and right curved holding arms by connecting pins. A lifting tool in which a link mechanism is formed by pivotally connecting a competitor with a center pin provided with a hook receiving ring, and a locking pin is provided in the middle of the front or rear suspension link on the right or left side, and the locking pin is mounted on the locking pin. The base of the unlocking lever with a hook-shaped guide groove is pivotally mounted, and the base of the clamping width adjustment piece is pivotally attached to the right or left curved holding arm body pivot shaft, and the upper part of the clamping width adjustment piece is The lower end of the opening regulation rod whose projection length has been adjusted is fixed to the lower end, and a locking piece having a locking groove hooked on a side end face at the protruding end of the opening restriction rod is fixed, Insert this lock piece between the front and rear plates of the lock release lever and in front of the slide pin installed near the top of the lock piece. An end is provided in the hook-shaped guide groove so as to be slidable, a tension spring is stretched near an upper portion of the center bolt opening regulating rod, and the opening is regulated when the lifting device is suspended by the hook receiving ring. The cross step between the projecting end of the rod and the lower end surface of the lock piece abuts and locks on the locking pin to maintain the opening width of the left and right holding pieces at a predetermined opening width,
When the other end of the lock release lever is pulled outward to release the cross step from the locking pin and lift the hook ring, the locking groove of the locking piece fits into the locking pin and locks, and the holding width of the holding piece A lifting tool characterized in that a lock opening control mechanism for fixing the lock is provided on a lock release lever lock piece. 2. A support shaft is erected at the center lower portion of the main body plate, a center portion of a right-pending arm is pivotally mounted on the support shaft, a right end portion is vertically provided downward, and a left curved other end portion is provided at an upper left position. The central part of the left hanging arm is pivotally attached to the support shaft in opposition to the right hanging arm, the left end is vertically lowered, and the other end of the right curved is extended to the upper right. The lifting mechanism is constructed by pivotally connecting the right link and the left link between the tip of the left curved other end of the right hanging arm and the center bolt between the tip of the right curved other end of the left hanging arm and the center bolt. The lifting device according to claim 1, wherein 3. A width determining plate is provided at the center front portion of the front body plate, and the width determining plate is vertically arranged at the upper center thereof.
A plurality of selective holding width adjusting holes for setting the holding width of the left and right holding pieces at predetermined intervals and a predetermined sliding vertical groove of a predetermined length below the holes, and the outer periphery of the lower end of the opening regulating rod is formed. A plurality of selective holding width adjusting grooves for setting the holding width of the left and right holding pieces corresponding to the plurality of selective holding width adjusting holes are provided at predetermined intervals, and a desired selective holding of the opening regulating rod. Select the width adjustment groove, align this groove with the bolt hole of the clamping width adjustment piece, and fix it with the adjustment bolt. Select the selection clamping width adjustment hole of the width determining plate corresponding to this selection clamping adjustment groove and adjust this. Align the hole with the clamping width adjustment hole, connect the width determining plate to the main body plate with the clamping width adjustment bolt, and connect the slide vertical groove and the selected clamping width adjustment groove with the center bolt to adjust the clamping width of the left and right clamping pieces. And a clamping opening setting mechanism for setting. Lifting device as claimed in any one.