Heavy object hanging jig

Abstract

To provide a heavy article suspension jig capable of firmly holding a heavy article and thus smoothly and safely carrying out suspension conveyance work when the heavy article is suspended and conveyed.SOLUTION: This heavy article suspension jig comprises: a body block 1; a slide block 4 provided with locking means 5 on the upper surface and fitted to a hollow part 3 formed in the body block 1 so as to be through in a vertical direction; and a drive shaft 11 provided with an inner diameter clamp mechanism 12 at one end and having a head 13 inserted from the side surface of the body block 1 through the slide block 4. A recessed part 6 parabolic in section is formed on one side surface of the slide block 4, an operation member 21 having a slide-contact surface corresponding to the recessed part is disposed in the recessed part 6, and the drive shaft 11 is inserted through the operation member 21.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a jig for suspending a heavy object, and more particularly to a jig for suspending a heavy object used when suspending and transporting heavy parts in automobile assembly plants and the like. [Background technology]

[0002] For example, in an automobile assembly factory, when a transmission, which is a heavy part, is to be assembled to an engine, the transmission is lifted by a chain block and then transported by an overhead crane, post-type jib crane, etc. to the assembly position with the engine. In this case, a hook at the bottom end of the transport crane's block chain is hooked onto a locking means for locking the transmission.

[0003] The locking means involves inserting a rod-shaped member into a positioning hole or a newly formed hook hole formed in the transmission, or hooking a hook onto a newly provided protrusion, but these rod-shaped members and hooks are not firmly fixed to the transmission, so there is a risk of them coming loose, which is dangerous.In addition, it is unnecessary cost to form a new part that is not related to the performance of the transmission. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-31549 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-144164 Summary of the Invention [Problem to be solved by the invention]

[0005] As mentioned above, conventional transmissionThe heavy object locking means used for suspending and transporting heavy objects such as heavy objects are not firmly fixed to the heavy object to be suspended, and therefore there is a risk of them coming loose, which is dangerous. Therefore, an object of the present invention is to provide a heavy object suspension jig that firmly holds the heavy object when suspending and transporting it, thereby enabling the suspension and transport work to be carried out smoothly and safely. [Means for solving the problem]

[0007] Claims to solve the above problem 1 The invention described in (1) comprises a main body block, a sliding block having a locking means on its upper surface and fitted into a hollow portion formed in the main body block so as to be able to pass through in the vertical direction, and a drive shaft having an inner diameter clamping mechanism on its tip end and inserted through the sliding block from the side of the main body block, A recess with a parabolic cross section is formed on one side of the sliding block, a through hole is drilled in the center of the recess for loosely inserting the drive shaft, an acting member having a sliding curved surface corresponding to the recess is disposed within the recess, the drive shaft is inserted through the acting member, the inner diameter clamping mechanism is inserted into a hole in the heavy object to be suspended, and the diameter of the inner diameter clamping mechanism expands within the hole when the locking means is pulled up. This is a jig for suspending heavy objects, characterized in that

[0008] In one embodiment, the working member is cylindrical, spherical, or semi-cylindrical in cross section with one side surface curved.

[0009] In one embodiment, the inner diameter clamping mechanism is composed of a first tapered surface formed on the head at the tip of the drive shaft, a second tapered surface formed on a shaft tube that is fitted onto the outer surface of the main body block and through which the drive shaft is slidably inserted, a plurality of movable pieces that have inclined end surfaces that slide against the first tapered surface and the second tapered surface and are arranged between the first tapered surface and the second tapered surface, and a ring that holds the plurality of movable pieces.

[0010] In one embodiment, a stopper for preventing the drive shaft from coming off is provided on the rear end side of the drive shaft, and in another embodiment, a stopper for preventing the drive shaft from turning is provided on the main body block. [Effects of the Invention]

[0013] As described above, the present invention has the advantage that when suspending and transporting a heavy object, no operation or effort is required; simply by lifting the heavy object, the inner diameter clamping mechanism comes into action and firmly fixes the heavy object, allowing the heavy object to be firmly and safely held and suspended. This has the effect of enabling the operation of suspending and transporting heavy objects to be carried out smoothly and safely. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view of a first embodiment of a heavy load suspending jig according to the present invention, with a main body block removed. FIG. [Figure 2] 1 is an exploded perspective view of a first embodiment of a heavy load suspending jig according to the present invention. FIG. [Figure 3] FIG. 1 is an exploded perspective view showing a method of assembling a first embodiment of a jig for suspending a heavy load according to the present invention. [Figure 4] 1 is a perspective view showing an example of the shape of an action member in a jig for suspending a heavy object according to the present invention and its assembled state. FIG. [Figure 5] 10A and 10B are perspective views showing other examples of the shape of the acting member in the jig for suspending a heavy object according to the present invention and the assembled state thereof. [Figure 6] 10 is a perspective view showing still another example of the shape of the acting member in the jig for suspending a heavy object according to the present invention and the assembled state thereof. FIG. [Figure 7] 1 is a vertical cross-sectional view showing the operation of a first embodiment of a jig for suspending a heavy load according to the present invention. FIG. [Figure 8] 1 is an enlarged cross-sectional view of a main part illustrating the operation of a first embodiment of a jig for suspending a heavy load according to the present invention. FIG. [Figure 9] FIG. 10 is a perspective view of a second embodiment of a heavy load suspending jig according to the present invention, with a main body block removed. [Figure 10]FIG. 10 is an exploded perspective view of a second embodiment of a jig for suspending a heavy load according to the present invention. [Figure 11] FIG. 10 is a partially cutaway perspective view of a third embodiment of a heavy load suspending jig according to the present invention. [Figure 12] FIG. 10 is a vertical cross-sectional view showing the operation of the third embodiment of the heavy load suspending jig according to the present invention. [Figure 13] 1A and 1B are diagrams showing a state in which the heavy load suspending jig according to the present invention is used. DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment of the present invention will be described with reference to the accompanying drawings. The heavy-load lifting jig of the present invention includes a drive shaft having an internal clamping mechanism at its end that is inserted into a horizontal or vertical hole in the heavy load to be suspended. When the suspension weight of the load is applied to the drive shaft in the axial direction of the drive shaft or in a direction perpendicular to the axis, the internal clamping mechanism operates within the hole to securely fix the load to the load. For example, in an automobile assembly plant, when a transmission is to be installed in an engine, one or more clamping mechanisms are attached to the transmission to securely and safely transport the transmission when the transmission is hoisted and transported to a position where it will be installed in the engine (see FIG. 13). It goes without saying that the object to be transported is a general heavy load, not limited to a transmission.

[0016] Fig. 1 is a perspective view (without the main body block) of a first embodiment of the heavy load suspending jig according to the present invention, and Fig. 2 is an exploded perspective view of the entire jig. As shown there, the heavy load suspending jig according to the present invention comprises, for example, a main body block 1 having a detachable cover plate 2 on one side and a hollow portion 3 that can be removed in the vertical direction, a sliding block 4 having a locking means (for example, a hanging ring 5) on the top surface and slidably fitted into the hollow portion 3 of the main body block 1, and a drive shaft 11 having an inner diameter clamp mechanism 12 at its tip and inserted through the sliding block 4 from the side of the main body block 1. The hanging ring 5 can be fixed, for example, by using the hanging ring 5 A protruding Threaded part of , on the top surface of the sliding block 4 The established Threaded part to This can be done by screwing.

[0017] A recessed portion 6 that is parabolic in side view is formed on one side of the sliding block 4, and a through-hole 7 for loosely inserting a drive shaft 11 is drilled in the deep central portion of the recessed portion 6 (see FIG. 7). The through-hole 7 is formed to be slightly elongated so that the drive shaft 11 can move slightly relative to the recessed portion 6 in the vertical direction. The sliding block 4 shown in the figure is a square prism, but it is not limited to this and may be a circular prism (FIG. 9) as in a second embodiment described later, or a polygonal prism such as a hexagonal prism.

[0018] A guide hole 8 is drilled on one side of the main body block 1, facing the through hole 7, into which a stopper 17 installed at the rear end of the drive shaft 11 is slidably fitted, and a fitting hole 10 is recessed on the opposite side of the main body block 1 into which a shaft tube 9 constituting the inner diameter clamping mechanism 12 described later is fitted (see Figure 8 in particular).

[0019] An inner diameter clamping mechanism 12 is provided at the tip of the drive shaft 11. The inner diameter clamping mechanism 12 is composed of a tapered surface (first tapered surface) 13a formed on the large-diameter head 13 at the tip of the drive shaft 11, a tapered surface (second tapered surface) 9a formed on the barrel 9 facing the head 13, and multiple movable pieces 14 incorporated between the tapered surfaces 9a, 13a, with their inclined end surfaces in sliding contact with the tapered surfaces 9a, 13a (see Figure 8). The multiple movable pieces 14 are held by an O-ring 15 or a C-ring so as to be able to move slightly in the radial direction.

[0020] A male thread is cut into the rear end of the drive shaft 11, and a stopper 17 is fitted onto the male thread portion 16 and fixed with a nut 18. The drive shaft 11 is inserted into the fitting hole 10 from its rear end side, and passes through an operating member 21 disposed in the recessed portion 6 of the sliding block 4, with the male thread portion 16 projecting out of the main body block 1 through the guide hole 8. Then, the shaft tube 9 is fitted into the fitting hole 10, and the stopper 17 is fitted onto the exposed male thread portion 16. The nut 18 is screwed onto the male thread portion 16 and tightened, so that the inner end face of the stopper 17 comes into pressure contact with the operating member 21 inside the recessed portion 6 (see Figure 7).

[0021] 1 to 4 is cylindrical and has a through-hole 22 formed in the center for inserting the drive shaft 11, with its curved surface in sliding contact with the slope of the recessed portion 6. The acting member 21 is sufficient as long as it has a curved surface that can be in sliding contact with the slope of the recessed portion 6. In addition to a cylindrical shape, the acting member 21 may be spherical, as shown in Fig. 5, or may have a semi-cylindrical cross section with one side surface curved, as shown in Fig. 6.

[0022] In a preferred embodiment, a means for preventing rotation of the drive shaft 11 is provided on the main body block 1. For example, the anti-rotation means may be configured such that a flat portion 24 is formed on the circumferential surface of the drive shaft 11, and a threaded rod 25 with a flat tip is screwed into the flat portion 24 from the top or side of the main body block 1.

[0023] A method for assembling the heavy load lifting jig according to the present invention will be described with reference to Figure 3. First, cover plate 2 is removed, and operating member 21 is inserted into recess 6. Next, drive shaft 11 is inserted from its rear end into fitting hole 10, passing through through-hole 22 of operating member 21 until its male thread portion 16 is exposed outside main body block 1 through guide hole 8. At the same time, shaft tube 9 is press-fitted into fitting hole 10. This fixes shaft tube 9 to the side of main body block 1 and prevents it from moving. Note that drive shaft 11 is slidable relative to shaft tube 9.

[0024] Thereafter, a stopper 17 is fitted onto the male thread portion 16 of the drive shaft 11 exposed from the guide hole 8, and the stopper 17 is tightened with a nut 18 until the inner end face of the stopper 17 abuts the operating member 21 (see Figure 7). If a means for preventing rotation of the drive shaft 11 is provided, a threaded rod 25 is screwed into the top or side of the main body block 1 until it abuts against the flat portion 24 of the drive shaft 11.

[0025] The heavy load hoisting jig of the present invention is used, for example, in an automobile assembly plant, to hoist a transmission and transport it suspended to the assembly position when the transmission is to be assembled to an engine. When attaching the transmission to a heavy load 31, the inner diameter clamp mechanism 12 at the tip of the drive shaft 11 is inserted into the insertion hole 32 of the heavy load 31 (see Figures 7 and 8). The insertion hole 32 may be newly drilled, but typically an existing positioning hole or the like is used. When hoisting the heavy load 31, the heavy load 31 is secured at about four points, and for example, the heavy load 31 is secured at two of these points using the heavy load hoisting jig of the present invention. A will be used (see Figure 13).

[0026] In the above configuration, after the tip of the drive shaft 11 is inserted into the insertion hole 32 of the heavy load 31, when the heavy load 31 is lifted by a crane or the like, the sliding block 4 is pulled upward via the hanging ring 5. The sliding block 4 is accommodated in the hollow portion 3 of the main body block 1 so as to be able to slide vertically, and the drive shaft 11 is loosely inserted into the elongated through-hole 7 of the sliding block 4, so that the sliding block 4 can rise within the hollow portion 3 until the drive shaft 11 hits the bottom surface of the through-hole 7 (see Figure 7(B)).

[0027] As the sliding block 4 rises, the acting member 21, whose curved surface is in contact with the slope of the recessed portion 6, receives an upward pressing force from the slope, but because the drive shaft 11 passes through the acting member 21, it cannot move upward and instead tries to escape sideways along the drive shaft 11. As a result, as the slope of the recessed portion 6 rises, the acting member 21 acts via the stopper 17 and the nut 18 to move the drive shaft 11 leftward in Figure 7. At this time, the shaft tube 9 is press-fitted into the fitting hole 10 and does not move, so the drive shaft 11, leaving the shaft tube 9 behind, moves slightly in the axial direction together with the acting member 21, stopper 17, and nut 18.

[0028] When the drive shaft 11 moves axially in this manner, the multiple movable pieces 14 are pushed by the tapered surface 13a of the head 13 and are strongly compressed against the tapered surface 9a of the shaft tube 9. As a result, the multiple movable pieces 14 bulge radially, causing the O-ring 15 (or C-ring) to strongly press against the inner surface of the insertion hole 32, preventing the drive shaft 11 from coming out of the insertion hole 32. After the heavy load 31 is transported in this state under suspension, it is lowered onto a workbench or floor, releasing the lifting force. The sliding block 4 then descends within the hollow portion 3 under its own weight. As a result, the pressing effect of the slope of the recess 6 on the working member 21 is eliminated, and the drive shaft 11 returns to its original position. The inner diameter clamp 12 no longer acts on the inner surface of the insertion hole 32, allowing the drive shaft 11 to be removed from the insertion hole 32.

[0029] 9 and 10 show a second embodiment of the present invention, which differs from the first embodiment in the shapes of the main body block 1 and the sliding block 4. That is, in this second embodiment, the sliding block 4 is cylindrical, and the hollow portion 3 formed in the main body block 1 also has a corresponding cylindrical shape.

[0030] Furthermore, while the main body block 1 in the first embodiment is provided with a detachable cover plate 2 on one side, and the operating member 21 is inserted by removing the cover plate 2, the main body block 1 in the second embodiment is an integrated unit without the cover plate 2. An opening 1a is formed on one side or both sides of the main body block 1 for inserting and removing the operating member 21. It goes without saying that the main body block 1 in the first embodiment can also be configured without the cover plate 2, as in the main body block 1 in the second embodiment. Other components denoted with the same reference numerals as in the first embodiment are the same as those in the first embodiment.

[0031] The method of use and the effects of the second embodiment are not particularly different from the method of use and the effects of the first embodiment described above.

[0032] Next, a third embodiment shown in Fig. 11 will be described. This third embodiment lacks the sliding block 4 configuration of the first and second embodiments, and instead comprises a main body block 41 and a drive shaft 43 that has a locking means (hanging ring 5) at its upper end, an inner diameter clamping mechanism 12 at its lower end, and is slidably inserted into a sliding hole 42 in the main body block 41. The configuration of the inner diameter clamping mechanism 12 is not particularly different from that of the inner diameter clamping mechanism 12 in the first and second embodiments. Furthermore, in other configurations, parts that are assigned the same reference numerals as in the first and second embodiments have the same configuration.

[0033] The main body block 41 in the third embodiment is a block of any shape, such as a cylindrical shape, and has a sliding hole 42 penetrating vertically from the top to the bottom, through which a drive shaft 43 is slidably inserted. The lower end of the sliding hole 42 is enlarged to form a fitting hole 44, through which the drive shaft 43 is inserted. 43 The shaft tube 9 is fitted into the slide hole 42. The drive shaft 43 is inserted into the slide hole 42 from the bottom side of the main body block 41, and the shaft tube 9 is fitted into the fitting hole 44, and the male thread portion 16 is exposed on the top surface of the main body block 41. The female thread portion of the hanging ring 5, which serves as the locking means, is screwed onto the exposed male thread portion 16.

[0034] The heavy load hanging jig according to the third embodiment is used by inserting the inner diameter clamping mechanism 12 from above into the fitting hole 32 provided on the top surface of the heavy load 31. After the inner diameter clamping mechanism 12 is inserted into the fitting hole 32, when the hanging ring 5 is lifted, the drive shaft 43 is slidable relative to the main body block 41 and the barrel 9 fixed thereto, and therefore rises, leaving the heavy main body block 41 behind. As this movement occurs, the multiple movable pieces 14 are pushed up by the tapered surface 13a of the head 13 and are strongly pressed against the tapered surface 9a of the barrel 9. As a result, the multiple movable pieces 14 are pushed out in the radial direction, and the O-ring 15 (or C-ring) strongly presses against the inner circumferential surface of the fitting hole 32, preventing the drive shaft 42 from coming out of the fitting hole 32.

[0035] If the hanging ring 5 is further pulled up in this state, the heavy load 31 is also pulled up, and can be transported as is. Also, as in the above embodiment, after the heavy load 31 has been transported while suspended in this state, if the pulling force is released by lowering it onto a workbench or the floor, the drive shaft 43 will descend by its own weight, and as a result, the constriction pressure between the tapered surface 13a of the head 13 and the tapered surface 9a of the shaft cylinder 9 against the movable piece 14 will disappear, the action of the inner diameter clamp 12 will no longer be exerted on the inner circumferential surface of the insertion hole 32, and the drive shaft 43 will be able to be removed from the insertion hole 32.

[0036] It goes without saying that the heavy load suspending jig according to the present invention can be used repeatedly. [Industrial Applicability]

[0037] The present invention is as described above, and when suspending and transporting a heavy object, no operation or effort is required; simply by lifting the heavy object, the inner diameter clamp operates and firmly secures the heavy object, thereby allowing the heavy object to be securely and safely held and suspended, and has the effect of enabling the operation of suspending and transporting heavy objects to be carried out smoothly and safely, and therefore has great industrial applicability. [Explanation of symbols]

[0038] 1 Body block 2 Lid plate 3 Hollow part 4 Sliding Block 5 Hanging ring 6. Depression 7 Through holes 8 Guide hole 9 Shaft tube 10. Fitting hole 11 Drive shaft 12 Inner diameter clamping mechanism 13 heads 14 Movable Pieces 15 O-ring 16 Male thread 17 Stopper 18 Nut 21 Working member

Claims

1. The device comprises a main body block, a sliding block having a locking means on its upper surface and fitted into a hollow portion formed in the main body block so as to be able to pass through in the vertical direction, and a drive shaft having an inner diameter clamping mechanism on its tip end and inserted through the sliding block from the side of the main body block, a recess having a parabolic cross section formed on one side of the sliding block, a through hole drilled in the center of the recess for loosely inserting the drive shaft, an acting member having a sliding curved surface corresponding to the recess is disposed within the recess, the drive shaft is inserted through the acting member, the inner diameter clamping mechanism is inserted into a hole in the heavy object to be suspended, and the diameter of the inner diameter clamping mechanism expands within the hole when the locking means is pulled up.

2. The jig for suspending a heavy load according to claim 1 , wherein the sliding block is shaped like a rectangular pillar or a cylinder.

3. 2. The jig for suspending a heavy load according to claim 1, wherein the acting member has a cylindrical, spherical or semi-cylindrical cross section with one side surface curved.

4. The heavy load hanging jig described in claim 1, wherein the inner diameter clamping mechanism is composed of a first tapered surface formed on the head at the tip of the drive shaft, a second tapered surface formed on a shaft tube that is fitted onto the outer surface of the main body block and through which the drive shaft is slidably inserted, a plurality of movable pieces that have inclined end surfaces that slide against the first tapered surface and the second tapered surface and are arranged between the first tapered surface and the second tapered surface, and a ring that holds the plurality of movable pieces.

5. The jig for suspending a heavy load according to claim 1 , wherein a retaining means is provided on the rear end side of the drive shaft.

6. 2. The jig for suspending a heavy load according to claim 1, wherein a means for preventing rotation of the drive shaft is provided on the main body block.

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