JPS6338232Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chain block in which the connecting portion between the upper hook and the chain block body has been improved.
An embodiment of the present invention will be described below in detail with reference to the drawings. In FIGS. 1 to 3, 1 is a parallel body plate on which a load sheave, etc. in the chain block is axially mounted, and 2 is a pivot of an upper hook 3, which is axially mounted on the upper part of the main body plate 1 so as to be orthogonal to the plate surface. It is a worn pin. A pin hole 5 is horizontally drilled in the lower body part 4 of the upper hook 3, into which the pin 2 is inserted in a position perpendicular to the bent surface P of the hook 3. 4 is pivotally attached to the pin hole 5.

Further, a pin hole 7 is provided in the lower body part in a horizontal state and perpendicular to the pin 2, and a groove width of the thickness of the pin 2 is formed between both the pin holes 5 and 7 symmetrically with respect to the point 0. Notches 6, 6 are provided, and the pin 2 can horizontally rotate in this space from the pin hole 5 to the pin hole 7 about point 0. That is, with the upper hook 3 hooked to the elevated member 11, the pin 2 is horizontally rotated around the vertical axis about the point 0 from the state shown in FIG. 1 where the pin 2 is positioned in the pin hole 7. By moving the pin 2, the pin 2 can be moved into the pin hole 5 through the notches 6, 6 and rotated to the position shown in FIG. 2. 5 to 7, B is the body of the chain block, 8 is the load side sheave, 9 is the hand side sheave, and 10 is the lower hook.

When the upper hook 3 of the chain block is hooked to the high place member 11 in the work place, when the plane P is perpendicular to the pin 2 as shown in FIG. It can swing in the direction of arrow 12 around . In this state, if the fuselage part B is horizontally rotated 90 degrees around the vertical axis about the above point 0,
The state shifts to the state shown in FIGS. 1 and 7. The body section B can swing in the direction of the arrow 12 about the pin 2 both when the horizontal rotation is completed and during the rotation.

In the present invention, as described above, pin holes are provided in the lower body of the upper hook in a relationship perpendicular to and parallel to the bending surface P of the hook, and cutouts are provided point-symmetrically between the pin holes. In contrast, the body of the chain block can horizontally rotate 90 degrees to engage the pin from one pin hole to the other pin hole through the notch, and the pin can be rotated horizontally by 90 degrees to engage the pin from one pin hole to the other pin hole through the notch. The fuselage has a feature that the fuselage can swing when the upper hook is positioned in any of the above positions and during horizontal rotation, and a special connection fitting for horizontal rotation and rocking is provided between the upper hook and the fuselage. It has practical benefits in that it does not require

If the pair of pin holes and the pair of notches cause instability in the strength of the lower end of the upper hook, appropriate design considerations should be taken, such as increasing the overall dimensions of the lower end to provide a safety factor. All you have to do is add .

[Brief explanation of the drawing]

FIG. 1 is an enlarged front view of the main parts of one embodiment of the present invention.
Fig. 2 is a right side view of the pin rotated relative to the upper hook, Fig. 3 is a sectional view taken along the line A-A in Fig. 1, and Fig. 4 is a front view of the lower body of the upper hook. Fifth
The figure is a reduced side view of the chain block with the pin in the position shown in Figure 2 relative to the upper hook, Figure 6 is a rear view of the same, and Figure 7 is the pin in the position shown in Figure 1 relative to the upper hook. FIG. 2 is a reduced front view of a certain chain block. B... Chain block body part, P... Upper hook bending plane, 1... Parallel main body plate, 2... Pin, 3...
...Top hook, 4...Lower end body, 5, 7...Pin hole, 6...Notch.

Claims (1)

[Scope of utility model registration request] In a chain block suspended by hooking an upper hook to a high-place member, a pin hole perpendicular to the bending plane P of the upper hook and a pin hole parallel to the bending plane P are
Provided at the lower end of the upper hook in a perpendicular and horizontal state,
Two notches are provided between both pin holes, which are symmetrically cut out with a groove width of the pin thickness, and a pin, which is axially mounted on the upper part of the parallel main body plate of the chain block, is inserted between the two pin holes and the notch. A chain block that is rotatably inserted into the space to be formed.