JP2001080873A - Clamp for horizontal hanging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new structure of horizontal hanging clamp which can carry out the work to hang up, carry, and hang down a spread iron plate, in paticular, safely and efficiently, while maintaining the horizontal condition consistently. SOLUTION: A main body 1 having an almost horizontal steel plate receiving surface 2 and an opening in the almost horizontal direction at the upper side of the steel plate receiving surface 2; a cam 5 connected rotatable to the main body 1 at the upper side of the opening 3, and having an engaging tooth 8 which can appear and disappear to the opening 3 at its front end; a ratch member 7 which can take the lock position to maintain the cam 5 in a fastening condition to allow to clamp a hanging baggage which is inserted to the opening 3 by projecting the engaging tooth of the cam to the opening by the cooperation with the steel plate receiving surface of the main body, and the unlock position to allow to rotate the cam; a drawing spring 10 hung between the cam and the ratch member; and an operation means 12 to convert between the lock position and the unlock position by operating to rotate against the energizing force of the ratch member drawing spring 10; are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal suspension clamp which is particularly suitable for horizontally suspending an iron plate called an iron plate and has excellent safety and workability.

[0002]

2. Description of the Related Art The ground is often soft at construction sites for new buildings or new roads, and iron plates of a certain size are spread over the soft ground. Therefore, it is necessary to secure a passage for trucks and the like to carry in the materials. The iron plate is called an iron plate in the art, and has a plate thickness of 22 mm, a width of 1500 mm, and a length of 3 mm.
Two types different from 000 mm and 6000 mm are mainly used. In addition, there is one in which a hole having a diameter of about 60 mm is formed at the end.

[0003] Such iron sheets are lifted one by one from a predetermined storage place by a crane and loaded on a truck.
It is to be laid down at the site or laid down, or if it is unnecessary at the site, the iron plate is loaded again on the truck and put back on the original storage place, but the following methods are currently used for these work Have been.

[0004] The first method is a method in which a hook is inserted into a hole in an iron sheet and suspended vertically.

A second method is a method using a general vertical suspension clamp.

The third method is a method in which a horizontal projection of an H-section steel is lifted by so-called one-point diagonal suspension, using a dedicated clamp for clamping and lifting from both sides.

A fourth method is to use two to four so-called horizontal suspension clamps and to work while maintaining a horizontal state or a nearly horizontal state from lifting to hanging down. There are various types of horizontal suspension clamps used in this method.A representative one used for lifting an iron sheet is a claw hacker that simply locks the end of the iron sheet. , A cam-type hacker-type clamp with a structure in which a rotatable cam is attached in addition to a claw hacker and the top end of the cam is pressed down by the locking teeth at the tip of the cam. There is a type provided with a spring that biases the rotation.

[0008]

The first method is not general because it cannot be applied to an iron sheet without holes.

According to the second method, an iron sheet is suspended vertically, but a large number of iron sheets are stacked horizontally in a storage place or on a truck bed, so that a clamp can be easily set. Even if the longitudinal end is slightly shifted, it is considered to secure the space for inserting the clamp by placing a sleeper between each iron plate, The opening must be horizontal and the end of the iron sheet must be inserted, which is not easy. Further, in the lifting work for removing the laid iron plate from the site once, it is necessary to set a clamp after forming a gap with the ground using a bur or the like, which is more difficult to work. Not only is the risk high. This is the same in the first method.

The third method is a method in which a clamp dedicated to horizontal suspension of an H-shaped steel is originally used for lifting an iron plate, but such a use is prohibited as an erroneous use of the clamp and is not sufficiently used. There is a great risk of falling during lifting without obtaining a sufficient clamping force, and in fact, many accidents have occurred.

In any of the first to third methods, the iron plate is vertically lifted and transported.
As described above, the iron sheet is stored in a horizontal state at any of the storage place and the truck bed and is used in a horizontal state even at the site, so that it is preferable to lift and transport the iron sheet while maintaining the horizontal state. It is efficient to adopt In addition, when an iron plate suspended in a vertical state is loaded and unloaded from a truck at the site and laid on the ground, the impact at the time of landing may cause the clamp to come off, leading to an accident, and there is also a problem in safety. .

For this reason, it is considered that the fourth method of working while maintaining a horizontal state or a nearly horizontal state from lifting to hanging down is most preferable. And still had problems in terms of workability.

That is, since the claw hacker does not have any clamping force by itself and is a hoist relying on the sling of a sling such as a wire, it is necessary to hold the claw hacker by hand until the wire has a predetermined tension. The work is troublesome, and there is a problem in safety when the clay is rolled up or hung.

The cam-type hacker-type clamp can firmly clamp the iron sheet with the cam as long as the weight of the iron sheet acts, and the safety is much higher than that of the above-mentioned claw hacker. However, since there is no lock mechanism and the cam rotates freely with the cam pin as a fulcrum, even if you intend to set the clamp in the proper position on the storage place or on the truck bed, there is a problem with the balance of the clamp itself, distortion or bending of the iron plate Causes the clamp to deviate from the proper position,
It may lead to accidents such as falling off. In addition, there are many cases where it is not always expected to land horizontally when the iron sheet is hung on the ground under construction, and there is a possibility that another clamp may come off due to the impact at the time of one side preceding landing, leading to an accident.

Although the above problem can be solved by using an improved type in which the cam is always biased in the direction of closing, the clamp is firmly held in a stable place when the clamp is set or removed. It is necessary to push down the cam strongly against the bias of the spring to open it, which is troublesome. Poor functionality and danger when performing work in high places, such as setting a clamp on a high piled iron sheet, or removing a solid sheet metal placed on the ground at the installation site Accompanied by

[0016]

SUMMARY OF THE INVENTION Accordingly, the present invention solves the above-mentioned problems in the prior art, and in particular, for lifting and laying an iron plate.
An object of the present invention is to provide a horizontal suspension clamp having a novel configuration that can safely and efficiently work while maintaining a horizontal state consistently during transportation and suspension.

That is, the present invention provides a main body having a substantially horizontal steel plate receiving surface and a substantially horizontal opening above the steel plate receiving surface, and is rotatably connected to the main body above the opening.
A cam having an engagement tooth that can be protruded and retracted in the opening at the tip thereof;
At a point away from the cam, the hook is rotatably connected to the main body, the engaging teeth of the cam protrude into the opening, and the suspended load inserted into the opening can be clamped by cooperation with the steel plate receiving surface of the main body. A latch member that can take a locked position that maintains the cam in the attached state, and an unlocked position that allows the cam to rotate,
A pull spring provided between the cam and the latch member; and operating means for switching between a lock position and an unlock position by performing a rotation operation against the urging force of the latch member pull spring. It is a horizontal suspension clamp characterized by the following.

According to a preferred aspect of the present invention, the lower portion of the clamp body has an inclined bottom surface which rises so as to gradually become thinner toward the tip.

According to another preferred aspect of the present invention, a central recess is provided over a required length from the tip of the lower portion of the clamp body.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A horizontal suspension clamp according to an embodiment of the present invention will be described below with reference to the accompanying drawings. This horizontal suspension clamp is constructed so as to be able to work while maintaining the horizontal state consistently in particular in lifting, transporting and suspending the iron sheet. The substantially horizontal steel plate receiving surface 2 and the steel plate receiving surface A main body 1 having a substantially U-shape having a substantially horizontal opening 3 above, and a cam 5 rotatably connected to the main body 1 via a cam pin 4 above the opening 3. A latch member 7 rotatably connected to the main body 1 via a latch pin 6 at a point away from the cam pin 4. Actually, the main body 1 has a pair of main body plates arranged side by side at a predetermined interval, and a cam 5 and a latch member 7 are provided between the main body plates.

In FIG. 1, an engaging tooth 8 formed at the tip of the cam 5 protrudes toward the steel plate receiving surface 2 to apply a tightening force to an iron sheet (not shown) inserted into the opening. A state that can be given (tightened state) is shown, and the locked state is locked by the action of a latch pin 6 described later. Also,
At the rear end of the cam 5, a hanging hole 9 used to lift the clamp by a crane or the like is formed.

The cam 5 and the latch member 7 are
a and 10b are connected by a tension spring 10 provided between them. The cam 5 and the latch member 7 are urged to rotate clockwise about the cam pin 4 and the latch pin 6, respectively, in the tightened and locked state of FIG. To prevent further clockwise rotation from this position. Accordingly, the cam 5 is
An attempt is made to take a position (FIG. 1) in which the interval between a and 10b matches the contracted length of the extension spring 10.

From the state shown in FIG. 1, the circular ring 12 connected to the tip of the latch member 7 via the chain ring 11 is pulled up against the urging force of the tension spring 10, and the latch member 7 is lifted around the latch pin 6 as a center. When the roll pin 10b rotates clockwise and exceeds the center line connecting the cam pin 4 and the latch pin 6, the lock on the cam 5 is released, and the cam 5 and the latch member 7 are contracted by the tension spring 10 between the roll pins 10a and 10b. The two can freely rotate while correlating to take an interval according to the length of time. FIG. 2 shows an unlocked state when no load is applied. At this time, the tip engaging teeth 8 of the cam 5 are retracted into the upper portion 1a of the main body and hardly protrude from the opening 3; By pulling up the end and rotating it clockwise about the cam pin 6, the engagement teeth 8 can be projected. As the cam 5 rotates clockwise, the latch member 7 rotates counterclockwise about the latch pin 6 while maintaining the length of the extension spring 10.

The operation of the clamp constructed as described above will be described. When the clamp is in the tightened and locked state shown in FIG. 1, the ring 12 is pulled up against the urging force of the extension spring 10 as described above. After releasing the tightened and locked state, the rear end of the cam 5 is pushed in to rotate the cam 5 counterclockwise, so that the engaging teeth 8 are retracted into the upper portion 1a of the main body 1. As a result, the opening 3 is widely opened, so that the iron plate (not shown), which is a suspended load, is inserted deep into the opening 3 and then the ring 1 is pressed against the urging force of the pulling spring 10.
2 is pulled down to obtain the tightened locked state of FIG. At this time, the iron sheet inserted into the opening 3 is held with a sufficient tightening force, and is lifted by a crane or the like using the hanging hole 9 at the rear end of the cam 5, thereby lifting the iron sheet, and And transport it to a designated place.

When hanging down, gently lower the iron sheet on the ground, taking care not to tilt or fall, and roll down the crane until no load is completely applied to the iron sheet. After releasing the tightened lock state, the rear end of the cam 5 is pushed down to open the opening 3,
Hold the clamp body 1 by hand and remove it from the iron sheet.

The lower portion 1b of the clamp body 1 has an inclined bottom surface 1c which rises so as to become gradually thinner toward the tip as shown in the figure. Thereby, even when there is only a small space below the suspended load when lifting a suspended load such as an iron plate, it is easy to insert the lower portion 1b of the clamp body, and the clamp can be easily set. Even when removing the iron sheet laid at the construction site, the tip of the lower part 1b of the main body can be inserted simply by slightly inclining it with a bar, so that the work is easy. Further, when the clamp is pulled out after the suspended load is lowered, the suspended load can be pulled out while sliding along the inclined bottom surface 1c of the lower body 1b. Can be eased.

It is preferable that the lower portion 1b of the clamp body has a central concave portion 1d extending from the tip to a required length (FIG. 3). As a result, the function of mudguard at the time of setting the clamp can be exhibited, and at the same time, it can be used as a clamp which can also be used for two-point suspension of H-section steel or the like. When applying to the H-section steel, the wave section of the H-section steel should be
The clamp can be set at a stable position by inserting the clamp into the central recess 1d of b.

[0028]

According to the horizontal suspension clamp of the present invention, since the cam can be locked in the tightened state, the clamp can be easily set at an appropriate position of the suspended load, and the subsequent displacement can be prevented. Not at all.

When the clamp is set on a suspended load and the cam is locked in a tightened state, the cam is wound up by a crane. When the clamp is removed from the suspended load at a construction site or the like, the cam is tightened until the crane is completely unwound. It is not necessary for the worker to hold the clamp at a predetermined position of the suspended load by hand until the crane hoisting, unlike the work using the conventional horizontal suspension clamp, as it can maintain the locked state with Work can be easily performed, and an accident caused by hoisting of the crane is prevented, and an accident due to a detachment of the clamp due to an impact at the time of one-side preceding landing also during suspension is prevented.

[Brief description of the drawings]

FIG. 1 is a front view showing a cam suspension locked state of a horizontal suspension clamp according to an embodiment of the present invention.

FIG. 2 is a front view showing an unlocked state of the clamp.

FIG. 3 is a partial perspective view showing the shape of the lower part of the main body of the clamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamp main body 1a Main body upper part 1b Main body lower part 1c Inclined bottom surface 1d Central concave part 2 Steel plate receiving surface 3 Opening part 4 Cam pin 5 Cam 6 Latch pin 7 Latch member 8 Cam tip engaging teeth 9 Cam rear end hanging hole 10 Pull spring 10a , 10b Roll pin 11 Chain ring 12 Ring 13 Stopper

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masayuki Yamaji 2-3-1-12 Tomiokita, Nara City, Nara Prefecture Inside Eagle Clamp Co., Ltd. (72) Inventor Hatsuo Tsuyama 2-3-12 Tomiokita, Nara City, Nara Prefecture No. F-term in Eagle Clamp Co., Ltd. (reference) 3F004 AA04 AB12 AC01 AD01 AF01 AF06 AK02 AL01 AM08 EA03 LA07

Claims (3)

[Claims] 1. A main body having a substantially horizontal steel plate receiving surface and a substantially horizontal opening above the steel plate receiving surface, and is rotatably connected to the main body above the opening. A cam having an engaging tooth which can be protruded and retracted, and a hanging load which is rotatably connected to the main body at a point away from the cam, the engaging tooth of the cam protrudes into the opening, and is inserted into the opening. A latch member capable of taking a lock position for maintaining the cam in a tightened state capable of being clamped by cooperation with the receiving surface, and an unlock position for enabling the cam to rotate, and being bridged between the cam and the latch member. A horizontal suspension clamp comprising: a pull spring; and operating means for switching between a locked position and an unlocked position by performing a rotation operation against a biasing force of a latch member pull spring. 2. The horizontal suspension clamp according to claim 1, wherein the lower portion of the clamp body has an inclined bottom surface which rises so as to gradually become thinner toward the tip. 3. A central recess is provided over a required length from a tip of a lower portion of the clamp body.
Or two horizontal suspension clamps.