JPS6022055Y2 - Moving jaw of slab lifter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a movable claw for clamping slabs of a slab lifter used in steel works and the like to clamp and lift slabs and then transport them.

When the slab is clamped and lifted, the movable claws are designed so that the slab clamping claws move slightly downward along the inclined guide due to the weight of the slab.As they descend, the claws further sink into the slab, increasing the clamping force. However, on the other hand, the sliding surface is likely to be damaged due to the twisting action that occurs between the claw support that protrudes downward and the clamping arm that guides the claw support, making it difficult to operate smoothly. was there.

The present invention was devised in order to eliminate such drawbacks, and by using a crescent-shaped sliding piece that can rotate freely relative to the supporting member on one of the sliding surfaces, it is possible to avoid the problem even after long-term use. It is an object of the present invention to provide a movable pawl that can ensure smooth operation without damaging the sliding surface due to twisting action even if the sliding surface is worn out.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is the slab, 2 is the vertical frame of the slab lifter, 3
4 is a horizontal frame provided at both ends of the vertical frame 2 so as to be perpendicular to the vertical frame 2, 4 is a hanging device protruding from both sides of the vertical frame 2, and 5 is movable on both sides of the horizontal frame 3. 6 is a claw support provided slidably by the inclined guide of the arm 5; 7 is a claw provided at the tip of the claw support 6; 8 is an arm for vertical movement of the claw support 6; 9 is a guide bar that guides the inside of the claw support 6, and 10 (
7) is a bolt that fixes this guide bar 9 to the claw support 6, 11 is a cylinder of a spring device that always urges the claw support 6 to pull up, and 12 is a bolt that fixes this cylinder 11 to the arm 5. A connecting member 13 is a piston loosely fitted in the cylinder 11 so as to be able to move up and down, 14 is a piston rod thereof, and 15 is a coil spring installed in the cylinder 11 to constantly push up the piston 13.
Reference numeral 16 denotes a bracket protruding from the claw support, and is connected to the lower end of the piston rod 14 by a pin 17.

In this embodiment, as shown in FIG. 8, four sliding pieces 18 having a rectangular front shape and a moon-shaped side surface are prepared for each arm 5.

18a is a flat front surface serving as a sliding surface, and 18b is a rear surface shaped like a curved surface.

A large number of recesses are distributed and provided on the front surface 18a, and a solid lubricant 18c is embedded in these recesses.

18d is an oil groove provided on the front surface 18a, and 18e is an oil hole provided penetrating from this oil groove 18d to the rear surface 18b.

Further, as shown in FIG. 9, two sliding pieces 19 having a rectangular front shape and a moon-shaped side surface are prepared for each arm 5.

19a is a flat front surface serving as a sliding surface, and 19b is a rear surface shaped like a curved surface.

A large number of recesses are distributed and provided on the front surface 19a, and a solid lubricant 19c is embedded in each of these recesses.

19d is an oil groove provided on the front surface 19a. Then, backing plates 20 are fixed to both sides of the outer surface 6a of the claw support 6, respectively - the slab holding arms 5 facing the upper and lower parts of these backing plates 20
A total of four sliding piece insertion recesses 21 are formed on the inner surface 5a of the slider, and the sliding piece 18 is inserted into each of these recesses so that the front surface 18a faces the contact plate 20.

Further, 22 is an oil hole. Also, the inner side edges 6b of the claw support 6 facing the guide bar 9 (see FIGS. 4 and 6)
A total of two recesses 2 for inserting sliding pieces are provided on the top of each.
3, and insert the sliding pieces 19 into each of these recesses 23 so that the front surface 19a faces the guide bar 9.

Since the device of the present invention is configured as described above, when the slab 1 is clamped and lifted, the claw support 6
When the slide moves down from the position shown in the solid line to the position shown in the chain line 6', the sliding movement with the claw support arm 5 is caused by the sliding movement between the contact plate 20 and the front surface 18a of the sliding piece 18, and the movement of the guide bar 9. This is done by sliding the front surface 19a of the sliding piece 19.

The sliding pieces 18 and 19 are rotatable in the recessed part 21 of the arm 5, which is each supporting member, and the recessed part 23 of the claw support body 6, via the rear surfaces 18b and 19b, which are curved surfaces in the shape of a crescent moon. Therefore, the front surfaces 18a, 19a of the sliding pieces 18, 19 are always in uniform contact with the sliding surfaces of the contact plate 20 and the guide bar 9, and no twisting action occurs.

This effect remains the same even if the sliding surface is worn out due to long-term use, so the movable claw of the present invention does not have the risk of damage to the sliding surface due to prying action, unlike conventional movable claws. It completely disappears.

Therefore, the present invention has the excellent effect of preventing damage to the movable claw, significantly increasing its durability, and allowing the movable claw to operate smoothly at all times.

[Brief explanation of the drawing]

Figure 1 is a front view of a slab lifter equipped with the device of the present invention;
Fig. 2 is a side view thereof, Fig. 3 is a vertical cross-sectional view of the tip of the slab holding arm, Fig. 4 is a left side view showing a part of the arm in cross section, Fig. 5 is a right side view thereof, and Fig. 6 3 is a cross-sectional view taken along line A-A in FIG. 3, FIG. 7 is a cross-sectional plan view of the same, FIG. 9A is a front view of another sliding piece, the same figure is a side view thereof, and the same figure C is a plan view thereof. 1...Slab, 2...Vertical frame of slab lifter, 3...Horizontal frame, 4...
...Hanging tool, 5... Arm for holding slab, 6.
...Claw support, 7...Claw, 8...
・Stopper, 9...Guide bar, 18.19
...Sliding piece, 20...Touching plate, 21,
23... Recessed part for sliding piece insertion.

Claims (1)

[Scope of utility model registration request] In a device in which the slab-clamping claws are slightly lowered along an inclined guide when a slab is clamped and lifted, one of the sliding surfaces is connected to the flat surface of a sliding piece whose side surface is a moon shape. The curved surface of this moon-shaped sliding piece is rotatably held by the curved recess of the support member, and the flat surface of the sliding piece is brought into surface contact with the other sliding surface. A moving jaw of a slab lifter featuring