JPS6320703Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clamp, and more particularly to a clamp for gripping a long steel material such as a pipe or a bar and suspending it from the hook of a crane.

The applicant of this invention first developed a clamp for holding long steel materials such as pipes and bars in a vertical position and suspending them from the hook of a hoisting crane.
It was published in Utility Application No. 189750, filed on May 18th. The invention of the present application relates to an improvement of the clamp of the above application. The clamp of the above-mentioned application has a semi-tubular support member (hereinafter referred to as vertically split pipe material) having a substantially semicircular arcuate cross-section as a fixed jaw, and a long steel material taken into the bottom of the fixed jaw protrudes from the body of the clamp. The movable jaw, which can move forward and backward, applies strong pressure to the fixed jaw, and the fixed jaw and the movable jaw cooperate to swallow the long steel material. However, since the clamp of the above-mentioned application grips a long steel material at one point in the middle of its length, the long steel material taken into the base of the fixed jaw is tilted from the vertical position, causing the engagement between the fixed jaw and the movable jaw to occur. There is a risk that it will cause the person to leave the group. The present invention is aimed at solving this type of problem that occurs with conventional clamps that lift long steel materials in a vertical position.

An object of the present invention is to obtain a clamp specifically for long steel materials that is equipped with a mechanism that prevents tilting of the long steel materials that are held in the fixed jaw and the movable jaw of the clamp in a vertical position.

According to the present invention, the body consists of a pair of narrow side plates arranged parallel to each other at a predetermined distance apart, and the central axis is adjacent to the body on a central plane that passes through the center of the pair of side plates and is parallel to this. One vertical edge parallel to the central axis is fixed to the vertical edge of one side plate, and the other vertical edge is separated from the vertical edge of the other side plate of the fuselage to form an entrance/exit for the long steel material. a fixed jaw made of longitudinally segmented tubing; a movable jaw having serrations formed on one arm of a first bell crank rotatably mounted on a side plate at a location adjacent to the fixed jaw in the body; installed in the fuselage and said first
a locking mechanism connected to the other arm of the first bell crank to hold the movable jaw in a cooperative position opposite the fixed jaw; and a locking mechanism coupled to the other arm of the first bell crank. The clamp is equipped with a hanging means connected to a component, and is rotatably attached to the outer surface of the side plate on the side having the entrance, and has one arm in a position for closing the entrance and a position for retreating from the entrance. the other arm of the second bell crank closes the doorway when the locking mechanism is in the locked position, and the locking mechanism is in the unlocked position. the other arm of the second bell crank is connected to the locking mechanism such that the other arm of the second bell crank is retracted from the doorway when the clamp is in is obtained.

Now, an embodiment of the apparatus of the present invention will be described below with reference to the accompanying drawings.

Referring to FIG. 1a, there is shown a conventional clamp 11 for use with long steel materials, which includes a body 1 and a fixed jaw 4 made of a longitudinally split tube material vertically attached to the outside of the body 1. A movable jaw 6 protruding from a window 16 formed in a plate-shaped spacer 8 attached to the side of the body 1 is configured to cooperate with a fixed jaw 4 to swallow a long steel material such as a pipe or a bar. There is. An unlocking link 27 of a locking mechanism described below is provided on the upper left side of the side plate 5a.
A, 27B are shown.

The fixed jaw 4 is composed of a vertically divided pipe material, and the central axis OO of the vertically divided pipe material passes through the center of the two side plates 5a, 5b and is vertically placed in a vertical plane parallel to these side plates. One vertical edge 4A parallel to the central axis OO of the vertically divided pipe material is fixed to the vertical edge 5bs of the side plate by welding, and the other vertical edge 4B is attached from the right vertical edge 5as (Fig. 1) of the other side plate 5a. They are placed in opposite positions at a distance. Vertical edge 4B of the vertically split pipe material and vertical edge 5 of the side plate 5a
The gap with as is the entrance and exit for the long steel material W brought into the bosom portion of the vertically divided pipe material.

As shown in FIG. 1b, the fixed jaw 4 which cooperates with the movable jaw 6 to swallow the steel material W is provided with seats 18a and 18b made of a pair of round bars on its inner surface.

As shown in FIGS. 2 and 3, the fuselage 1 has a pair of narrow side plates 5a and 5b of the same shape and size arranged in parallel at a predetermined distance apart, and both are separated by a plate-like spacer member 12 and a stud-like spacer member 13. Assembled and configured.

As shown in FIGS. 4 and 5, a bell crank 2 is rotatably mounted inside the body 1 at the lower left corner by a pin 8. The tip of the left arm of the bell crank 2 is provided with a serrated projection 6A and constitutes a movable jaw 6. Suspension rods 3A and 3B made of two plates having the same shape and dimensions grip the tip of the right arm of the bell crank 2 at their lower ends and are rotatably connected thereto by a pin 15. Lifting rod 3
A and 3B extend upward and have their upper ends connected to the annular fitting 7 through pins 14. The ring fitting 7 has a ring 7R on its upper end that can be hung on the hook of a crane. Reference numeral 17 indicates a guide for guiding the vertical movement of the pin 14. The fourth part in which the movable jaw 6 is bitten into the steel material W
A locking mechanism 20 that maintains the position shown in the figure is installed inside the body 1 at a position facing the bell crank 2. The locking mechanism 20 is composed of a locking metal fitting 26 rotatably attached to the inside of the body by a pin 25, and a locking spring 21 described below.

The locking spring 21 has its lower end attached to the lifting rods 3A and 3B.
It is a coil spring that is locked to the studs 22 on the protrusions 24A and 24B, and the upper end is locked to the stud 23 on the locking fitting 26. As shown in FIG. 5, in the non-operating position where the movable jaw 6 is retracted into the body 1, the locking fitting 26 places the stud 23 below the pivot pin 25, and the locking spring 21 is relaxed and the lock is in the unlocked state. It has been placed. As shown in Figure 4,
When the locking mechanism 20 is in the locked state, the locking spring 21
The lock fitting 26 is rotated in the counterclockwise direction A around the pin 25 against the tension of the protrusion 26 of the lock fitting 26.
A is brought into contact with the spacer/stopper 13, and the stud 23, which locks the upper end of the spring 21, is placed in a stable position on the left side of the straight line YY connecting the centers of the lower stud 22 and the rotation pin 25. 23 is made so that it does not easily move to the right side of the straight line YY. That is, the bell crank 2 is locked in the engaged position shown in FIG. An unlocking link 27A (FIG. 1) placed on the outside of the side plate 5a is integrally fixed to a locking fitting 26 via a pin 25. Another unlocking link 2 with one end connected to the unlocking link 27A
7B has a string 28 hanging down from the opposite end. Therefore, when pulling the string downward, release links 27A, 27
The lock fitting 26 can be unlocked from the locked position via the rotary pin 25. The above is the configuration of the conventional clamp 11 exclusively for long steel materials.

As shown in FIGS. 2-5, the present invention is provided with an arm 32 that acts as a bar for closing the steel entrance 31 of the fixed jaw 4 at the upper level of the movable jaw 6.

That is, the side plate 5a located on the same side as the entrance/exit 31
A bell crank 30 is rotatably attached to the bell crank 30 via a pin 33, and the left arm 32 of the bell crank 30 is extended to a position where it closes the entrance 31 (the third
Figure) The other arm 34 of the bell crank 30 has a long hole 35.
It is equipped with A stud 36 attached to the unlocking link 27A is slidably fitted into the elongated hole 35, and when the unlocking link 27A, that is, the locking metal fitting 26 is in the locked position, the barring arm 32 of the bell crank 30 is inserted into the doorway 31. (Figure 4), unlock link 2
When 7A is placed in the unlocked position, the bar arm 32
is adapted to be drawn into the fuselage through the entrance/exit 31 (Fig. 5).

FIG. 6 shows a stud 38 provided on a disc-shaped unlocking fitting 37 attached to the outside of the side plate 5a, and a long hole 38 made in the right arm 34 of the bell crank 30.
A modified embodiment is shown below.

As described above, according to the present invention, when the long steel material W is taken into the bosom of the fixed jaw 4 and the movable jaw 6 is engaged to operate the locking mechanism 20, the bar arm 32 is automatically extended to the entrance/exit 31. Tilting of the long steel material W can be prevented.

[Brief explanation of the drawing]

Fig. 1a is a perspective view showing the conventional device, Fig. 1b is a sectional view showing the main parts of the device in Fig. 1a, Fig. 2 is a sectional view showing the device of the present invention in a non-operating position, and Fig. 3 is a sectional view showing the main part of the device in Fig. 1a. FIG. 4 is a front view showing the device of the present invention in the operating position; FIG. 5 is a front view of the device of the present invention in the non-operating position; FIG.
The figure is a front view showing a modified embodiment of the device of the present invention. 1...Body, 2...Bell crank, 3A, 3B
...Lifting rod, 4... Fixed jaw, 5A, 5B... Side plate, 6... Movable jaw, 7... Circular fitting, 8... Rotating pin, 9A, 9B... Reinforcement material, 10... Device of the present invention, 11... Conventional device, 12... Plate-shaped spacer, 13... Stud-shaped spacer, 14...
Connection pin, 15...Connection pin, 16...Window, 17
...Guide, 18...Catch, 20...Lock mechanism,
21...Lock spring, 22...Stud, 2
3...Stud, 24A, 24B...Protrusion, 25
...Rotating pin, 26...Lock fitting, 27A, 27
B...Unlock link, 28...String, 29...Rotating pin, 30...Bell crank, 31...Entrance/exit,
32...Bar arm, 33...Rotating pin, 34...
...Arm, 35...Long hole, 36...Stud, 37...
...Disc type unlocking fitting, 38...Stud.

Claims (1)

[Scope of utility model registration request] A body consisting of a pair of narrow side plates arranged parallel to each other at a predetermined distance apart, with the central axis vertically located at a position adjacent to the body on a central plane passing through the center of the pair of side plates and parallel to this. Fixing consisting of a longitudinally split pipe material whose one longitudinal edge parallel to the central axis is fixed to the vertical edge of one side plate and the other longitudinal edge is separated from the vertical edge of the other side plate of the fuselage to form an entrance and exit for the long steel material. a movable jaw mounted within the body and having a serration formed on one arm of a first bell crank rotatably mounted to the side plate at a location adjacent to said fixed jaw within the body; a locking mechanism connected to the other arm of the first bell crank to hold the movable jaw in a cooperative position opposite the fixed jaw, and the lock coupled to the other arm of the first bell crank; A clamp equipped with a hanging means connected to a structural member of the mechanism, which is rotatably attached to the outer surface of the side plate on the side having the entrance and exit, and has one arm positioned to close the entrance and exit from the entrance. a second bell crank that is reciprocated to and from the locking position, and when the locking mechanism is in the locked position, the other arm of the second bell crank closes the doorway and the locking mechanism is released. The other arm of the second bell crank is connected to the locking mechanism such that the other arm of the second bell crank is retracted from the doorway when in the locked position. , clamp.