JPH0728181U - Grasping mechanism for cylindrical objects - Google Patents

Abstract

(57) [Summary] [Purpose] When gripping a Hume tube, etc., it can be stably held regardless of the size of the tube. [Structure] A rotary circle 3 is provided under the rotary motor 2, a tiltable clamp base 4 is provided at the lower end of the rotary circle 3, and a pin 5 provided under the clamp base 4 is used as a fulcrum. In the gripping mechanism 1 configured to grip the cylindrical object 7 by the clamp arms 6a and 6b which can be opened and closed inward and outward, the cylindrical object 7 gripped from the central portion of the clamp base 3
A stopper 8 that presses the outer periphery of is provided so as to hang down, and the stopper 8 is provided with an elastic body 9 that absorbs an impact load when the cylindrical object 7 is gripped. [Effect] By being able to directly grasp a grasped object of a cylindrical object, it is possible to reduce the number of auxiliary workers conventionally required, and it is possible that the auxiliary worker is caught in a pipe due to shaking of loads during pipe installation work. There is no fear of accidents.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a gripping mechanism for a cylindrical object which is attached to the tip of a working machine of a construction machine having an upper turning mechanism so as to grip a fume pipe or the like when burying a fume pipe in water supply and sewerage work. Regarding

[0002]

[Prior art]

 Conventionally, for example, as shown in FIG. 3, in order to carry and install a cylindrical object 32 such as wood or a fume tube, a hanging operation using a crane 31 (or a power shovel) or the like is performed. However, it usually requires at least two people, a slinging worker such as the wire 33 and a caring worker, to increase the cost, and to install the pipe. There was a risk of an accident such as an auxiliary worker touching the pipe and getting injured.

[0003]

[Problems to be solved by the device]

 In order to prevent such a problem, as a prior art of a dedicated gripping mechanism for gripping something such as a cylindrical object, for example, Japanese Utility Model Laid-Open No. 63-169588, Japanese Patent Laid-Open No. 2-175589, and Japanese Patent Laid-Open No. 4-75589. -260596, etc. Each of these has a clamp claw, and is devised to grip a pipe or the like. Of these, the one disclosed in Japanese Utility Model Laid-Open No. 63-169588 is not dedicated to gripping a cylindrical object, and therefore the clamper is used. -If a pipe or the like is gripped by the tip of the hole, it may fall off and fall, which is not suitable. Further, in the one disclosed in Japanese Patent Application Laid-Open No. 4-260596, a pipe or the like can be gripped in the clamp arms on both sides, but when the pipe has a small diameter, the pipe rises in the clamp and gripping becomes unstable. On the other hand, in the case of Japanese Patent Application Laid-Open No. 2-175589, there is an advantage that the tube can be stably gripped by the gripping attachment provided in the clamp arm, but the gripping attachment becomes complicated and is gripped. There was a drawback that the size of the tube was limited.

In view of this, the present invention provides a gripping mechanism for a cylindrical object that can stably grip regardless of the size of a Hume pipe or the like, and is a drawback of the prior art. It was made with the purpose of solving the problem.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a rotary circle at the bottom of a rotary motor, a tiltable clamp base at the lower end of the rotary circle, and a pin at the bottom of the clamp base. In a gripping mechanism that grips a cylindrical object with a clamp arm that can be opened and closed inward and outward with a fulcrum as a fulcrum, a stopper that presses the outer periphery of the cylindrical object gripped from the center of the clamp base is provided. At the same time, the stopper is provided with an elastic body that absorbs an impact load when the cylindrical object is gripped.

[0006]

[Action]

 According to the above configuration, since the grasped cylindrical object is constantly pressed downward by the stopper, the grasped cylindrical object rises during grasping to make the grasping state unstable. There is no such a problem.

[0007]

【Example】

 1 is a front view showing an embodiment of a gripping mechanism for a cylindrical object according to the present invention, and FIG. 2 is a side view of FIG.

As shown in FIGS. 1 and 2, the present invention is provided with a rotary circle 3 at the lower part of the rotary motor 2 and a tiltable clamp base 4 at the lower end of the rotary circle 3. In the gripping mechanism 1 in which the cylindrical object 7 is gripped by the clamp arms 6a and 6b which can be opened and closed inward and outward with the pin 5 provided at the lower portion of the clamp base 4 as a fulcrum, the center of the clamp base 3 is held. A stopper 8 is provided so as to press the outer periphery of the cylindrical object 7 gripped from the portion, and the stopper 8 is provided with an elastic body 9 that absorbs an impact load when the cylindrical object 7 is gripped. It is composed of.

The gripping mechanism 1 of the present invention is hung from the ends of an arm 10 and a link 11 such as a power shovel (not shown) via pins 12 and 13, and a rotary motor 2 is provided at the top. Has been. A rotating circle 3 which is rotated by the rotation of the motor 2 is provided below the rotating motor 2 and is rotatable about a vertical rotation center line OO. A pair of cylinders 15 are vertically symmetrically connected to each other by a pin 14 between the lower portion of the rotary circle 3 and the clamp base 4 below the rotary circle 3, and the bottom side to the rotary circle 3 and the rod side to the clamp base 4 side. , 15 are connected to each other. Therefore, when the cylinder 15 is expanded or contracted, the clamp base 4 can be tilted ± 25 ° with respect to the rotary circle 3. The clamp base 4 is integrally formed with a yoke-shaped bracket 16 having an appropriate space in the left-right direction in FIG. 1, and the lower part of the racket 16 is separated from the left-hand side in FIG. The middle of the clamp arm 6a made of a single plate is rotatably connected by a pin 5. Similarly, the right side clamp arm 6b, which is formed of two separate plates, is rotatable by the pin 18 and the bottom side of the clamp cylinder 17 attached to the bracket 16 of the clamp base 4 at the top. A pin 20 connects the upper part of the clamp arm 6a and the rod end of the cylinder 17, and the clamp link 19 connecting the upper part of the clamp arm 6a and the middle of the clamp arm 6b. Therefore, when the clamp cylinder 17 is expanded and contracted, the rod ends are expanded and contracted so that the clamp arms 6a and 6b are rotated as shown by the solid line, the one-dot chain line, and the two-dot chain line in FIG. The stopper 8 which is the main part of the present invention is a shaft member having a male screw which is located at the center of the clamp base 4 and fits into the screw hole of the boss 4a provided at the connecting portion of both brackets 16 of the clamp base 4. 8a, a pushing member 8b which is engaged with the shaft member 8a and is slidable up and down and is in contact with the outer periphery of the cylindrical object 7, and an elastic body 9 such as a spring. Then, the elastic body 9 is inserted between the upper surface of the pushing member 8b and the lower surface of the flange provided on the shaft member 8a, and the shaft member 8a is positioned by the screw at the fitting portion with the boss 4a. There is. Although the shaft member 8a is of a screw type in this embodiment, it may have a position-adjustable structure of a pin replacement type or a hydraulic cylinder type according to the pipe diameter. In the figure, reference numeral 21 is a gripping member in which the two plates of the clamp arms 6a and 6b are joined together at a gripping portion. Reference numeral 7 indicates the case where the cylindrical object has a large diameter, and 7'in the case of a small diameter.

Next, the operation will be described. First, the rod of the clamp cylinder 17 is contracted to open the clamp arms 6a and 6b on both sides outwardly, and clamp the cylindrical object 7 such as a humming tube so as to be held by the tips of the clamp arms 6a and 6b. Extend the rod of cylinder 17. When the cylindrical object 7 has a large diameter, the stopper 8 is rotated and lowered at the position indicated by the one-dot chain line when the diameter is small, and when the cylindrical object 7 is the small diameter, the pushing member 8b is moved downward. The elastic body 9 is pressed against the outer circumference. As a result, when the cylindrical object 7 is clamped and the gripping structure 1 is lifted by a boom or the like (not shown), even if the cylindrical object 7 tries to rise above the clamp arms 6a and 6b, the stopper 8 As a result, the elastic body 9 absorbs the load received from the cylindrical object 7 at that time, and no excessive force acts on the stopper 8, so that a stable grip can be achieved. . Therefore, it is possible to deal with burial work in all directions such as the fume tube without moving the entire vehicle.

[0011]

[Effect of device]

 As described above, according to the present invention, the rotary circle is provided under the rotary motor, the tiltable clamp base is provided at the lower end of the rotary circle, and the pin provided under the clamp base. In a gripping mechanism in which a cylindrical object is gripped by a clamp arm that can be opened and closed inward and outward with a fulcrum as a fulcrum, a stopper that presses the outer periphery of the cylindrical object gripped from the center of the clamp table is hung. In addition, since the stopper is provided with an elastic body that absorbs the impact load at the time of gripping the cylindrical object, the gripping object of the cylindrical object can be directly gripped, which reduces the number of auxiliary workers conventionally required. In addition to the above, it is possible to prevent an accident such as an auxiliary worker being caught in a pipe due to a shake of load in the conventional pipe installation work.

[Brief description of drawings]

FIG. 1 is an explanatory front view showing an embodiment of a cylindrical object gripping mechanism according to the present invention.

FIG. 2 is an explanatory view of the side surface of FIG.

FIG. 3 is an explanatory view showing a state of suspending a Hume pipe or the like by a conventional crane.

[Explanation of symbols]

 1 Grip mechanism 2 Rotating motor 3 Rotating circle 4 Clamping base 5 Pins 6a, 6b Clamping arm 7, 7'Cylindrical object 8 Stopper 9 Elastic body

Claims (1)

[Scope of utility model registration request] 1. A rotary circle is provided at a lower portion of a rotary motor, and a tiltable clamp base is provided at a lower end of the rotary circle. In a gripping mechanism for gripping a cylindrical object with a freely openable and closable clamp arm, a stopper for pressing the outer periphery of the cylindrical object gripped from the central portion of the clamp base is provided, and the stopper is attached to the stopper. Is a cylindrical object gripping mechanism, which is provided with an elastic body that absorbs an impact load when the cylindrical object is gripped.