JPH052539Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is suitable for use as a lifting jig that can be used when lifting objects, more specifically when lifting hollow objects with a crane or the like. The invention relates to a lifting jig.

"Prior Art and its Problems" In powder metallurgy, a molded product obtained by press-molding metal powder is placed in a sintering furnace and heat-treated. At this time, in order to increase production efficiency, as many molded products as possible are housed in the furnace at predetermined intervals.

By the way, conventionally, the work of storing molded products in a sintering furnace mainly relied on humans or forklifts.
For this reason, molded products made of metal powder, which are brittle and easily damaged, often come into contact with other objects and have their corners destroyed, which has been a factor in deteriorating production yields.

"Means for Solving the Problems" The lifting jig according to the present invention has two curved lever members that are curved in an arch shape from one end toward the other end. The center portions of the two bent lever members are rotatably connected to each other in a state where the distance between the one end portions increases as the distance is decreased, and a holding member is rotatably provided at each of the one end portions of the two bent lever members; , a plurality of positioning holes are formed in one of the two bent lever members between the connecting portion and the other end thereof along the length direction of the bent lever member. .

"Function" In the lifting jig with the above configuration, select the positioning hole according to the hollow item to be lifted, insert the pin into one of the holes, and then insert the pin into one of the holes.
Two holding members are positioned inside the article in a state facing outward, and both other ends of the two bent lever members are lifted a predetermined distance by a crane or the like.

Then, the two bent lever members are displaced in a direction in which the distance between the other end portions decreases and the distance between the one end portions increases, and the two holding members are also displaced outwards and the inner surface of the article is displaced. , thereby securing the article to the lifting jig.

At this time, the pin inserted into the positioning hole of one bent lever member comes into contact with the other bent lever member, thereby preventing the article from being damaged due to excessively widening the gap between the two holding members.

After the article is fixed to the lifting jig as described above, the article can be lifted and transported by raising a crane or the like.

"Example" Hereinafter, the lifting jig of the present invention will be described in detail with reference to the drawings.

1 and 2 show a first embodiment of the lifting jig of the present invention, and reference numerals 1 and 1 in the figures indicate bent lever members.

The bent lever member 1 is formed such that its center portion 2 is located more inward than both end portions 3 and 4. In this example, the bent lever member 1
is formed into a bow shape. A slit 5 penetrating from the inside to the outside is provided in the central portion 2 of one of the bent lever members 1, 1. The center portion 2 of the other bent lever member 1 is formed to have a thickness such that it fits into the slit 5. The central portions 2, 2 of the two bent lever members 1, 1 thus formed are rotatably connected by a shaft 6. Both ends 3 of each bent lever member 1,
4 is located on the outer side with respect to the central portion 2.

In addition, in the lifting jig of this example, a plurality of positioning holes 7 lined up along the length direction of the other bent lever member 1 are bored in the upper part of the center portion 2 of the other bent lever member 1. There is.

Holding members 8, 8 are attached to one end portions 3, 3 of these bent lever members 1, 1. In the lifting jig of this example, the holding member 8 is composed of a joint part 9 and a pressing part 10. Since the article 11 to be lifted has a hollow cylindrical shape, the pressing section 10 in this example is formed into a curved plate shape to match the inner surface shape of the article 11 . The outer surface side of this pressing part 10 is
It is covered with an elastic material softer than the article 11, such as urethane rubber. This pressing member 10 has a joint portion 9 attached at approximately the center of its inner surface.
It is attached to one end 3 of the bent lever member 1 so as to be rotatable in the vertical direction.

Further, holes 12, 12 for lifting are bored on the other end portions 4, 4 side of the bent lever members 1, 1.

Next, how to use this lifting jig will be explained.

To lift an article 11 using this lifting jig, first pass round bars through the holes 12, 12 in the other ends 4, 4 of the bent lever members 1, 1, and then connect the wires of the crane to these round bars, respectively. Multiply.

Next, one end portion 3, 3 of the bent lever member 1, 1
The holding members 8, 8 attached to the article 11 are inserted into the hollow part of the article 11.

When the crane is raised in this state, the other end portions 4, 4 of the bent lever members 1, 1 are displaced inwardly, whereas the one end portions 3, 3 are displaced outwardly. As a result, the holding members 8, 8 of the one end portions 3, 3 are tightly pressed against the inner surface of the article 11, and are engaged with the article 11 by the frictional force generated by the pressing force. At this time, since the outer surfaces of the holding members 8, 8 are covered with urethane rubber or the like, the inner surface of the article 11 will not be damaged.

At this time, one of the plurality of positioning holes 7 is selected depending on the shape, weight, material, etc. of the article 11.
Before inserting the holding members 8, 8 into the hollow part of the article 11, a pin is inserted into the positioning hole 7 (especially in the case of an article that is easily damaged).

As a result, the pin comes into contact with one of the bent lever members 1, preventing the other ends 4, 4 of the lever members 1, 1 from being displaced inwardly, and at the same time, the excess of the one end 3, 3 of the lever members 1, 1 is prevented. Severe outward displacement is prevented. Therefore,
The pressing force of the holding members 8, 8 on the article 11 is adjusted, so that no more than necessary force is applied to the article 11, and the article 1
It is possible to reliably prevent deformation and breakage of 1.

Next, when the crane is further raised in this state, the article 11 can be lifted and transported.

"Effects of the Invention" As explained above, the lifting jig of the present invention has two curved lever members that are curved in an arch shape from one end toward the other end. The center portions of the two bent lever members are rotatably connected to each other in a state where the distance between the one end portions increases as the distance is decreased, and a holding member is rotatably provided at each of the one end portions of the two bent lever members; , one of the two bent lever members has a plurality of positioning holes formed between the connecting portion and the other end thereof along the length direction of the bent lever member, so that the holding member is hollow. It is possible to fix the article to the holding member, lift it, and transport it while adjusting the pressure exerted on the inner surface of the article to a range appropriate for the article. Therefore, even fragile and easily damaged items such as molded metal powder products can be safely transported in a stable state using cranes, etc., thereby improving yields and production efficiency. can.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the lifting jig of the present invention, and FIG. 2 is a front view showing the same embodiment as viewed from below. 1...Bent lever member, 2...Central part, 3...
One end, 4...other end, 6... shaft, 8... holding member.

Claims (1)

[Scope of utility model registration request] Two curved lever members that are curved into an arch shape from one end to the other end are connected to each other in the center with the distance between one end increasing as the distance between the other ends decreases. are rotatably connected, a holding member is rotatably provided at one end of each of the two bent lever members, and one of the two bent lever members has a connecting portion and the other end thereof. A lifting jig characterized in that a plurality of positioning holes are formed along the length of the bent lever member between the bent lever members.