JPH0447187Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> This invention relates to a clamp device used when horizontally suspending a beam material made of H-shaped steel using a crane or the like.

<<Prior Art>> At construction sites, H-shaped steel beams are often suspended by a crane and moved to a predetermined position for temporary installation. Conventionally, in order to suspend H-beams, a part called a suspension piece is often fixed to the top surface of the H-beam, and a shaft pin is inserted into a hole formed in this suspension piece to suspend it using a crane. . In some cases, H-shaped steel is suspended by a crane using a clamping device called a Renfro Clamp (registered trademark).

《Problems that the invention aims to solve》 The above-mentioned method of fixing the hanging piece to the H-shaped steel takes time and effort to fix the hanging piece, and furthermore, the hanging piece must be cut and removed after the H-shaped steel is temporarily installed. This requires a lot of time and effort.

On the other hand, the Renflow clamp is easier to attach and detach than the method using a hanging piece, and is more efficient. However, after suspending and moving the H-beam to a temporary location, when removing this clamping device from the H-beam, the worker must move onto the H-beam to the mounting position of the clamp device, remove the pin of the auxiliary mechanism, and then clamp the I had to pull out the device. This poses a safety problem as it involves working at heights. In addition, conventional clamping devices are attached from one side of the H-shaped steel, so they are vulnerable to lateral forces.
There was a risk that it would come off if a large lateral force was applied.

This invention was devised in view of the above-mentioned conventional problems.In particular, it does not require manual intervention for removal, and the H-shaped steel can be firmly held.
An object of the present invention is to provide a clamp device for hanging shaped steel.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention provides a pivot member that pivotally supports the arms combined in an X shape so that they can be freely opened and closed, and a pivot member that is fixed to the upper end of the arms. a hanging wire, a locking member that is integrally provided at the lower end of each of the arms and grips the upper flange portion of the H-shaped steel from both sides thereof, and a locking member that is fixed to the pivot member and provided therein. An actuator is provided with an actuating rod that is relatively movable upward and downward, and the tip of the actuating rod comes into contact with a flange of an H-shaped steel when descending, and an actuator that is loosely fitted into the lower part of the actuating rod. and a bracket that is engaged with the actuating rod and moves upward as a unit when the actuating rod rises, and a bracket that is spanned between this bracket and each of the above-mentioned arms, and both ends of which are pivotally connected to each other so as to be freely rotatable. Equipped with link rod,
The connecting position of each link rod and each arm is set at a symmetrical position below the above-mentioned pivot position of the arms and above the raised position of the above-mentioned bracket to constitute a clamping device for hanging H-shaped steel.

<<Operation>> Two or more clamp devices configured as described above are hung on a crane or the like using the above-mentioned hanging wires at a predetermined interval in the horizontal direction. In order to suspend a horizontal H-beam using this clamping device, the actuator is first actuated to move the actuating rod upward. Then, the bracket also moves upward, and the arm is pushed up via the link rod, widening the space between the locking members at its lower end. In this state, the clamp device is lowered to bring the tip of the actuating rod into contact with the center of the upper surface of the flange of the H-shaped steel. Then, the locking members are positioned below both sides of the flange portion of the H-shaped steel. When the actuator is actuated and the actuating rod is extended downward, the pivot of the arm of the clamping device moves upward, and the arm closes between its locking members due to its own weight. go. Then, both the locking members sandwich and grip both end surfaces and the lower surface of the flange portion of the H-shaped steel. At this time, both of the locking members first contact both end surfaces of the flange part and clamp the flange part from both sides by the rotational moment due to their own weight. After this contact, when the actuating rod is further extended, the bracket moves to the arm side. The arm is supported by the arm, disconnects from the actuating rod, and moves away from the tip of the actuating rod.As the arm rises, both locking parts eventually come into contact with the lower surface of the flange, and this flange It is held while the top surface is pressed down by the tip of the actuating rod.
At this time, due to the downward pressing force, a component force acts between the two locking members to close them. When the hanging wire is pulled upward in this state, a force is applied to both locking portions due to the weight of the H-shaped steel to further close them, thereby holding the H-shaped steel more firmly. To remove the H-beam, actuate the actuator to move the actuating rod upward to open the gap between the locking parts.

<<Example>> A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a side view of the H-type steel hanging clamp device according to the present invention, and FIG. 2 is a side view of the − in FIG.
A sectional view taken along the line, FIG. 3 is a schematic diagram for explaining the operation of the clamp device.

As shown in FIGS. 1 and 2, this clamping device 1 mainly consists of arms 2a and 2b made of steel plates combined in an X shape and rotatably supported on a pivot member 3. It is structured as follows.

The pivot member 3 has a rectangular parallelepiped shape, and pivot shafts 4, 4 for coaxially supporting the arms 2a, 2b combined in an X shape are integrally formed on each of its opposing end surfaces 3a, 3b. The arms 2a, 2b pivotally supported by these rotating shafts 4, 4 are configured such that the upper side and the lower side are closed by the weight of each arm 2a, 2b.

A hanging wire 6 is fixed to the upper end of each arm 2a, 2b via a pulley 5, and the upper flange 7a of the H-shaped steel 7 is attached to the lower end of each arm 2a, 2b along its longitudinal direction. A locking member 8 is integrally provided to be gripped from both left and right sides in the direction. The locking members 8 are provided so as to project inwardly, and each projecting end 9 has a substantially L-shape that abuts and locks the lower surface 7b and side end surface 7c of the flange portion 7a. A locking portion 10 having a shape is formed. Further, the locking member 8 is fastened and fixed to the arms 2a and 2b with a bolt 11 and a nut 12, and a bolt insertion hole 1 for this fixing is provided.
3 are arranged in parallel in the horizontal direction (in the illustrated example, 3
The mounting position can be changed as shown by the imaginary line according to the size of the H-shaped steel 7 to be clamped.

Further, the pivot member 3 is provided with an actuator 14 . The actuator 14 is provided with its operating rod 15 facing downward, and the operating rod 15 is movable up and down relative to the fixed pivot member 3.

In the illustrated example, a hydraulic cylinder 16 is employed as the actuator 14, and the cylinder 17 side thereof is fixed to the pivot member 3. This hydraulic cylinder 16 is of a bidirectional operating type, and the inside of the cylinder 17 is divided into two chambers by a piston 18 integrally formed at the upper end of the actuating rod 15, and the upper chamber 19 is used for the downward movement of the actuating rod 15. pressure chamber, lower chamber 2
0 serves as a pressure chamber for upward movement of the operating rod 15, and hydraulic oil is supplied to and discharged from the supply and discharge pipe 22 provided at the top of the upper chamber 19 through a supply and discharge port 21 opened at the upper end surface. Hydraulic oil is supplied to and discharged from the lower chamber 20 through a supply and discharge port 23 opened on the side thereof and from a supply and discharge pipe 24 provided on the side thereof.

In addition, the actuating rod 1 of this actuator 14
The flange portion 7 of the H-shaped steel 7 is attached to the tip portion 15a of 5.
A pressing member 25 that comes into contact with and presses the upper surface a is integrally provided. This pressing member 25 is made by pasting a rubber cushion material 27 on the lower surface of a flat steel plate 26, and is rotatably attached via a spherical seat 28 to the tip 15a of the actuating rod 15, which is formed into a spherical shape with an enlarged diameter. ing.

Further, a bracket 29 is provided at the lower part of the actuating rod 15, which is loosely fitted coaxially thereto, and when the actuating rod 15 moves upward, it is latched to the spherical seat 28 below and moves upward together. A link rod 30 is provided between the bracket 29 and each of the arms 2a and 2b, extending over them. Each link rod 30
has bracket 29 and arms 2a and 2b at both ends.
The connection position to the arms 2a, 2b on one end side is below the rotation shaft 4 that pivotally supports the arms 2a, 2b, and the maximum point of the bracket is It is located above the raised position and is connected to the left and right arms 2a, 2b at symmetrical positions.

Further, a rod member 31 is fixed to the bracket 29 in parallel with the actuating rod 15. At the upper end of the rod member 31 and on the side of the cylinder 17, proximity switches 32a and 32a, each serving as a pair of position sensors, are provided. 32b is provided.

With the clamping device 1 constructed in this way, the H-shaped steel 6
In order to hold the H-beam 7, as shown in FIG. 3, the H-beam 7 is placed in a horizontal position with its flange 7a facing upward.

Next, as shown in FIG. 3, the clamp device 1 is suspended by a crane or the like and positioned above the H-shaped steel 7, and the hydraulic cylinder 16 is retracted to move its operating rod 15 upward. Then the operating rod 15
As the bracket 29 rises, the bracket 29 is engaged with the spherical seat 28 and rises, and as a result, the link rod 3
0 pushes up the arms 2a, 2b, and the locking members 8, 8 at the lower ends of the arms 2a, 2b are opened wide.

Next, as shown below, the clamp device 1 is lowered to bring the pressing member 25 into contact with the center of the upper surface of the flange portion 7a. Then, the locking members 8, 8 are positioned on the lower side of the flange portion 7a.

Next, as shown below, when the hydraulic cylinder 16 is extended and the actuating rod 15 is moved relatively downward, the entire clamping device 1 is actually lifted upward by the hydraulic cylinder 16, and the arms 2a,
2b are closed by their own weight, and H
The flange portion 7a of the shaped steel 7 is locked by locking members 8, 8. At this time, the L-shaped vertical locking surface 10a of the locking portion 10 of the locking members 8, 8 first contacts the side end surface 7c of the flange portion 7a, and then the actuating rod 15 is further extended. The horizontal locking surface 10b abuts against the lower surface 7b of the flange portion 7a. After this, a pressing force from the pressing member 25 acts on the upper surface of the flange portion 7a, and due to this pressing force, the pressing member 25 and the horizontal locking surface 10b of the locking members 8, 8
The H-shaped steel 7 is vertically sandwiched and held between the two locking members 8, 8 due to the pressing force
There is a force between them that tries to close them,
The H-shaped steel 7 is held between the vertical locking surfaces 10a of the locking members 8, 8 by the rotational moment force due to the arm's own weight and the above component force.

Thereafter, as shown in , the clamp device 1 is raised using a crane or the like to move the H-shaped steel 7 to a predetermined position, and it is erected and fixed between pillars or the like. At this time, when the clamp device is raised and tension is applied to the hanging wire 6, an H
The load on the shaped steel 6 generates a component force that tends to further close them, thereby holding the H shaped steel 7 firmly.

Next, once the H-shaped steel 7 is fixed between the columns etc.
After lowering the crane or the like as shown in FIG. 2, the hydraulic cylinder 16 is retracted to widen the gap between the locking members 8 and 8, and the H-shaped steel 7 is released.

Next, as shown in , the clamp device 1 is moved upward again, and as shown in , the hydraulic cylinder 16 is extended again to close the space between the two locking members 8 and 8, and the next H-shaped steel 7 is transported. Move to work.

Therefore, as is clear from the above description, in this clamp device 1, the actuator 14 for opening and closing the arms 2a and 2b combined in an X shape is arranged with the operating direction of the actuating rod 15 being vertical. The arms 2a and 2b are fixed to the rotation shafts 4 of the arms 2a and 2b, and the arms 2a and 2b are opened and closed via a link rod 30 that is secured to the lower part of the operating rod 15. For this reason, arm 2
The mass can be concentrated as much as possible on the vertical line of the rotation centers of a and 2b, and the center of gravity of the entire clamping device 1 can be well balanced. As a result, arm 2
Lateral vibration can be suppressed as much as possible during the opening/closing operation of a and 2b, and the operation becomes smooth, and the stability of the clamping device 1 on the flange 7a when attaching and detaching the H-beam 7 is improved. .

Further, the actuator 14 is fixed to the pivot member 3, and two sets of arms 2a, 2 are coupled and pivotally supported on both sides of the pivot member 3 in an X-shape.
Since it is located between arms 2a and 2b,
With these two sets, the actuator 14 can be easily protected, and damage caused by other objects hitting the actuator 14 can be prevented as much as possible.

Further, since the movement of the actuating rod 15 that operates in the vertical direction is transmitted to each arm 2a, 2b via the bracket 29 and link rod 30 that are loosely fitted thereto, and the arms 2a, 2b are opened and closed, the movement of the actuating rod 15 is arm 2a, 2 for the stroke
The opening degree of b can be increased, and as a result, the clamp device 1 can be made as compact as possible. Furthermore, when extending the actuating rod 15 to grip the H-shaped steel 7, the bracket 29 loosely fitted to the actuating rod 15 is attached to the arm 2a,
After the arm 2b comes into contact with the side of the flange 7a of the H-shaped steel 7, the relationship with the actuating rod 15 is severed and it is supported by the arms 2a and 2b, so that the arm 2b is prevented from further elongating. It becomes possible to reliably hold various H-shaped steels of different sizes on the flange portion 7a, flexibly corresponding to the width and thickness of the flange portion 7a.

Further, the tip end 15a of the actuating rod 15 is connected to the H-shaped steel 7 through a pressing member 25 that is integrally provided thereto.
Since the upper surface of the flange portion 7a of the actuator 14 is brought into contact with the upper surface of the flange portion 7a, when the H-shaped steel 7 is held between the pressing member 25 and the locking members 8, 8, the pressing force of the actuator 14 is directly applied to the H-shaped steel 7. The pressure is transmitted to the flange portion 7a of the locking members 8, 8, so that the upper surface of the flange portion 7a can be reliably pressed, and the horizontal displacement of the H-shaped steel 7 can be prevented as much as possible. acts as a component force that tries to close them, and the holding force is increased as much as possible.

In addition, with this clamp device 1, the H-shaped steel 7 can be easily attached and detached by operating the actuator 14, so if the actuator 14 is remotely controlled, there is no need to remove the clamp device at a high place. , it will be possible to reduce dangerous work at heights.

In the illustrated example, a hydraulic cylinder 16 is used as the actuator 14, but instead of the hydraulic cylinder 16, a screw-type actuator driven by an electric motor or the like may be used.

<<Effects of the invention>> In summary, according to the invention, mass can be concentrated as much as possible on the vertical line in the direction of gravity at the pivot position of the arm, and the balance of the center of gravity of the clamp device as a whole can be improved. can. In addition, since the movement of the actuating rod that operates in the vertical direction is transmitted to each arm via the bracket and link rod that are loosely fitted thereto to open and close those arms, the opening degree of the arm can be increased relative to the stroke of the actuating rod. As a result, the clamp device can be made as compact as possible.

Furthermore, when extending the actuating rod to grip the H-beam, the bracket that is loosely fitted onto the actuating rod will not touch the actuating rod after the arm abuts the side of the flange of the H-beam. Since the relationship between the two parts is severed and the rod is supported on the arm side, there is no restriction on the further extension of the actuating rod, and the size can be adjusted flexibly according to the width and thickness of the flange part. It becomes possible to securely hold different types of H-shaped steel. In addition, the tip of the actuating rod is placed in contact with the upper surface of the flange of the H-shaped steel, so that the pressing force of the actuating rod is directly transmitted to the upper surface of the flange, ensuring that the upper surface of the flange is firmly pressed down. By doing so, it is possible to prevent the H-shaped steel from lateral displacement as much as possible, and the pressing force becomes a component force between the locking members to close them, so that the holding force of the H-shaped steel can be improved as much as possible. In addition, the H-shaped steel can be attached and detached with the simple operation of activating the actuator, and if the operation of the actuator can be controlled remotely, there will be no need to remove the clamping device at high places, and dangerous work at high places will be avoided. be able to reduce

[Brief explanation of drawings]

Fig. 1 is a side view showing a preferred embodiment of the clamp device for hanging H-shaped steel according to the present invention, Fig. 2 is a sectional view taken along the line - in Fig. 1, and Fig. 3 is the operation of the clamp device. It is a schematic diagram for explaining. 1... Clamp device, 2a, 2b... Arm,
3... Pivot member, 6... Wire, 7... H-shaped steel, 8... Locking member, 14... Actuator,
15... Actuation rod, 15a... Tip of actuating rod, 25... Pressing member at tip, 29... Bracket, 30... Link rod.

Claims (1)

[Scope of utility model registration request] A pivot member pivotably supports the arms combined in an X shape, a hanging wire fixed to the upper end of each of the arms, and an H-shaped steel integrally provided to the lower end of each of the arms. A locking member that grips the upper flange portion from both sides thereof, and a locking member that is fixedly provided to the pivot member and that allows an operating rod to move upward and downward relative to each other. an actuator whose tip abuts against the flange of the H-shaped steel; a bracket which is loosely fitted to the lower part of the actuating rod and is locked thereto and moved upwardly when the actuating rod is raised; A link rod is provided between this bracket and each of the above arms, and both ends of the link rod are rotatably connected to each other, and the connecting position of each link rod and each arm is the above-mentioned pivot position of the arms. A clamp device for hanging an H-shaped steel, characterized in that it is set at a symmetrical position lower and above the raised position of the bracket.