JPH0423898Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a panel lifting jig that can safely and reliably lift concrete panels such as ALC boards in narrow construction sites.

<Conventional technology> Conventionally, when hoisting a panel at a construction site, a sling 2 was wrapped around the panel 1 as shown in Figure 6, but since the sling 2 was not used as the original sling, it was difficult to tighten the sling. There were drawbacks such as the possibility of the panel 1 slipping down, the work of wrapping the sling 2 around the panel 1 was time consuming, and the sling 2 getting caught under the panel 1 during erection, making it difficult to remove. Recently, in order to improve the above-mentioned drawbacks, as shown in FIG.
A panel hoisting jig that can also be used as a shear vise to extend and retract the shaft part 3 using the upper handle 4 has been developed and put into practical use.

On the other hand, as shown in Japanese Utility Model Application Publication No. 58-127074, in order to lift the block, clamping plates are provided on both sides of the lower part, and a shaft with screws in opposite directions drilled on both sides is used to lift the block. It has a structure in which the shaft is attached to the support shaft on both sides and is screwed into bearings having female threads inside, and a handle is provided at the end of the shaft. There is a known lifting jig for a block that has a structure in which the shaft protrudes largely outward.

<Problem to be solved by the invention> However, in the panel lifting jig shown in FIG. However, if another object hits the panel during lifting and external pressure is applied to the jig, only the force initially tightened by the handle 4 will act on the clamp part 6. Because the clamping force was not sufficient, there was a risk that the panel would shift and fall.

Furthermore, the above-mentioned lifting jig for the block is similar to the jig shown in FIG. This type of construction has the same drawbacks as the one shown in Figure 7, and has a structure in which the shaft protrudes outward.With such a structure, the shaft part gets in the way, making it difficult to use it in narrow construction sites. It was unsuitable as a lifting jig for panels that have a large number of parts.

The object of the present invention is to provide a panel lifting jig that eliminates these conventional drawbacks.

<Means for Solving the Problems> The present invention provides a pin-shaped clamping device having clamping plates on both sides of the lower part, and a support shaft is provided on both sides of the upper part, and the shaft has screws in opposite directions on both sides. In a lifting jig having a structure in which both sides are attached to the support shaft and screwed into bearings having internal threads, and a handle is provided at the end of the shaft, a handle is provided at the end of the shaft. A sprocket portion having flanges on both sides is provided, and a surrounding portion surrounding the sprocket portion and a support frame having a flattened protrusion with a notched guide groove on the inside are provided at the upper and lower portions, and the chain is inserted from one side of the notched guide portion. is inserted, and after the chain is engaged with the sprocket part, the other notch guide part is removed, and by lifting the chain, the entire jig is lifted, and the length of the shaft including the handle provided on one side is smaller than the width of the lower jaw when the clamping plates on both sides of the lower part are parallel to each other, and furthermore, the length of the shaft including the handle provided on one side is smaller than the width of the lower jaw when the clamping plates on both sides of the lower part are parallel to each other; This is a panel lifting jig characterized by being provided with a stopper part.

<Function> As described above, the lifting jig according to the present invention is provided with a sprocket part having flanges on both sides at the center of the shaft, and has cutout guide grooves inside the surrounding part surrounding the sprocket part and the upper and lower parts. A frame having a certain flattened protrusion is provided, the chain is inserted from one side of the notch guide part, and after the chain is engaged with the sprocket part, it passes through the other notch guide part. When a clamping tool holding a panel is lifted up via a chain, the panel can be tightened more firmly by the gravity of the chain, and the panel can be prevented from falling off from the clamping tool.

Further, as mentioned above, the lifting jig according to the present invention has the following features:
A sprocket part having flanges on both sides is provided at the center of the shaft, and the chain is inserted from one side of the notch guide part, meshes with the sprocket part, and then passes through the other notch guide part. Because of this, the central structure can be made compact.

Therefore, the length of the shaft including the handle provided on one side can be smaller than the width of the lower jaw when the jaw plates on both sides of the lower part are parallel to each other. In this way, the shaft part can be prevented from protruding to the outside, and as a result, the structure is suitable as a panel lifting jig that is often used in narrow construction sites.

In addition, the downwardly parallel stopper portion provided in the lower clamping member in the lifting jig according to the present invention is for defining the upper end position of the panel when it is clamped by the clamping tool.

<Example> An example of the lifting jig according to the present invention will be specifically described using the drawings.

As shown in FIG. 1, which is a perspective view of the panel being held between them, FIG. 2, which is a front view, and FIG. The front and rear parts are integrally connected to each other to form a pincer-shaped gripping tool 7.

On both sides of the lower part of this clamping tool 7 are clamping plates 9a and 9b.
have. These clamping plates 9a and 9b are rotatably attached via a shaft 10, and the clamping plates 9a and 9b are
Elastic plates 11 made of rubber, foamed resin, etc. are integrally laminated on the inner surfaces of a and 9b. Further, in order to define the upper end position of the panel to be clamped, a downwardly parallel stopper portion 22 is provided. An elastic plate 11 made of rubber, foamed resin, or the like is integrally laminated on the inner surface of this stopper portion 22 as well.

As shown in FIG. 1, the panel 21 sandwiched between the sandwiching plates 9a and 9b is sandwiched in the thickness direction of the panel.

In addition, there are support shafts 1 on both sides of the upper part of the pinching tool 7.
Shafts 14a and 14b having threads in opposite directions on both sides are attached to the support shaft 15 on both sides, and are screwed into bearings 16a and 16b having female threads inside. It has a structure in which a handle 19 is provided at the end of the shaft 14a.

Therefore, by rotating the handle 19, the gap between the clamping plates 9a and 9b can be widened or narrowed.

A sprocket portion 12 is provided at the center of the shaft configured in this manner. The details of this sprocket portion 12 include flanges 13 on both sides, as shown in FIG.

Although it is only shown by a dashed line in FIG. 2, the sprocket portion 12 has an enclosing portion that surrounds the sprocket portion 12 and allows the chain 17 to mesh with the sprocket, as shown in FIG. 18c, and above and below there is provided a support frame 18 having flattened protrusions 18a and 18b with cutout guide grooves 20a and 20b provided inside to reliably guide the chain 17 to the sprocket portion 12. .

With this configuration, chain 17
The chain 17 is connected to the cutout guide portions 20a and 20b without becoming entangled, falling down, or coming off.
It is inserted through the notch guide portion 20a on one side of the sprocket portion 12, and after meshing with the sprocket portion 12, passes through the other notch guide portion 20b.

Since the jig of the present invention is constructed in this way, as shown in FIG. It is now possible to configure the width of the lower constrictions to be smaller than the width of the lower constrictions when they are parallel to each other.

In this way, the panel lifting jig of the present invention can widen the gap between the clamping plates 9a and 9b by pulling the chain 17 in any direction as well as by rotating the handle 19. It is constructed in such a way that it can be widened or narrowed.

Therefore, when the chain 17 is lifted, the entire structure is lifted, and the gap between the holding plates 9a and 9b can be narrowed.

<Effects of the invention> The panel lifting jig according to the invention has the above-described structure, and after rotating the handle to grip the panel, the jig is lifted by a chain while holding the panel. This allows the panel to be more firmly clamped by gravity, thereby completely preventing accidents such as the panel falling off the lifting jig even if external pressure is applied to the panel during lifting. You can.

At the same time, the panel lifting jig according to the present invention is
The length of the shaft including the handle on one side is
Since the width of the lower clamping plate is smaller than the width of the lower clamping plate when the clamping plates on both sides of the lower part are parallel to each other, there is a gap between the thickness of the panel and the width of the clamping member on both sides. For example, it has a structure that allows it to pass through the panel while sandwiching it, making it suitable as a panel lifting jig that is often used at narrow construction sites (for example, the space between the structural support of a building and outdoor temporary scaffolding is narrow). It is characterized by the presence of

Furthermore, since the panel lifting jig according to the present invention is provided with a downwardly parallel stopper part within the lower clamping member, the upper end of the panel can be defined when the panel is clamped, so that the clamping position of the panel can be kept constant. It also has features such as:

[Brief explanation of the drawing]

Figure 1 is a perspective view of the lifting jig of the present invention, Figure 2 is a front view of the lifting jig of the present invention with the support frame omitted by dashed lines, and Figure 3 is a perspective view of the lifting jig of the present invention. A side view of the upper jig, Figure 4 is an enlarged perspective view of the sprocket part,
FIG. 5A is a perspective view showing the mutual positional relationship of the backing member, sprocket, and chain, FIG. 5B is a sectional view thereof, and FIGS. 6 and 7 are explanatory views showing conventional examples, respectively. 1, 21 are panels, 2 is springs, 3, 14
a, 14b are shafts, 4, 19 are handles,
5, 17 are chains, 6, 9a, 9b are clamping plates,
7 is a clamping tool, 8 and 15 are support shafts, 10 is a shaft, 11 is an elastic plate, 12 is a sprocket portion, 13 is a collar portion, 1
6a, 16b are bearings, 18 is a support member, 18a,
18b is a flattened protrusion, 20a and 20b are notch guides, and 22 is a stopper.

Claims (1)

[Scope of utility model registration request] A shaft 14 is provided with supporting shafts 15 on both sides of the upper part of a pincer-shaped clamping tool 7 having clamping plates 9a and 9b on both sides of the lower part, and screws a and b in opposite directions are bored on both sides.
a, 14b are attached to the above-mentioned support shaft 15 on both sides, and bearings 16a, 1 have female threads inside.
6b, and the shaft 14
In a lifting jig having a structure in which a handle 19 is provided at the end of the shaft 14
A sprocket portion 12 having flanges 13 on both sides is provided at the center of the sprocket portions 18a and 14b, an enclosing portion 18c surrounding the sprocket portion 12, and a flattened projection portion 18a having cutout guide grooves 20a and 20b on the inside at the upper and lower portions. The chain 17 is inserted from the notch guide part 20a on one side of the notch guide parts 20a and 20b, and after the chain 17 is engaged with the sprocket part 12, the chain 17 is inserted into the other notch. The structure is such that it passes through the guide portion 20a, and by lifting the chain 17, the entire jig 7 is lifted up, and the handle 19 provided on one side
The length of the shaft 14 including the lower part is smaller than the width of the lower part when the holding plates 9a and 9b on both sides of the lower part are parallel to each other, and there is a downwardly parallel stopper in the lower part. A panel lifting jig characterized in that a portion 22 is provided.