JPS6039629B2 - Opening/closing mechanism of mechanical gripping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening/closing mechanism for a mechanical gripping device used for lifting and transporting containers and the like with a crane.

When lifting and transporting containers such as drums with a crane, this mechanical grip uses the principle of leverage to convert the force acting in the vertical direction of the container during lifting into horizontal force using a lever link mechanism to grasp the container. Conventionally, this type of device has a large hanging allowance, making it extremely inconvenient to use in places with limited height. The present invention solves these drawbacks, and the present invention has a small hanging allowance.
The present invention provides an opening/closing mechanism for a mechanical gripping device that can be automatically gripped and released by remote control.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on embodiments and drawings.

This embodiment is applied as a gripping device for a container with a flange, and in FIGS. 1 to 4, 1 and 1' are central parts, and slits 2 and 2' are vertically symmetrical. It is a frame plate that is fixed to the board 3 and also has stay bolts 4, 4.
' are held in parallel to form the main body of the device.

Reference numerals 5 and 5' designate angle-shaped levers, on one end of which grips 6 and 6' for grasping the container are fixed via bolts and nuts, and on the other end roller shafts 7 and 7' are provided, the tops of which are attached to both ends of the main body. It is rotatably attached to shafts 8, 8' provided in the section.

Reference numeral 9 denotes an operating weight formed in the shape of a rectangular plate, which is provided between the frame plates 1 and 1' so as to be able to move up and down. An operating shaft 10 is attached to the operating shaft 10, and a hanging fitting 11 is attached to the upper end of the operating weight 9.
However, on both sides of the upper part, connecting plates 12, 12' are symmetrically formed of plates thinner than the operating bell 9, and are provided with grooves 13, 13' that engage with the roller shafts 7, 7' of the levers 5, 5'. is attached.

14, 14' and 15, 15' are frame plates 1, 1, respectively.
' are guide members protruding vertically opposite to each other to suppress the lateral movement of the actuating weight 9, and the guide members 14,
The connecting plates 12, 12' are configured to slide within the slits formed between the connecting plates 15 and 14', 15'.

Reference numeral 16 is a hook-shaped piece that is provided with an engaging portion 17 that engages with the operating shaft 10, and at the tip thereof, the operating shaft 10 that descends and comes into contact with the slit 2 bored in the frame plate slides. A downwardly inclined surface 18 is formed, and this inclined surface is configured to be turned and connected to the upper surface 17a of the engaging portion. A guide groove 19 is formed that guides the operating shaft 10 leading upward.

The lower end of the fishing piece is pivoted upward on a shaft 2 fixed below the slit of the frame plate 1, and one end is rotated in a clockwise direction by a tension spring 21 fixed to the frame plate 1. The attraction and rotation is caused by a presser spring (plate) whose one end is fixed to the frame plate 1 so that the tip of the inclined surface 18 is located at a point where the tip slightly below matches the operating shaft 10 that has descended within the slit 2. spring) 22. 23 indicates a container with a brim.

The opening/closing mechanism of the present invention configured as above will be explained.

FIG. 5 shows the relationship between the operating shaft 10 and the fishing piece 16 when the crane hook (not shown) is attached to the hanging fitting 11 and the container is grasped and lifted.At this point, the operating weight 9 is In order to be lifted upwards, levers 5 and 5' are used as shown in Figure 2.
Since the roller shafts 7 and 7' of are pulled upward, the shafts 8 and
The gripping fittings 6, 6' move inward using 8' as a fulcrum, and the container is gripped.

After the container lifted in this way is moved to a predetermined position and landed, when the crane is further operated to lower the hook, the base plate 3 of the device comes into contact with the upper end of the container 23, and the descent of the device body is stopped. However, the operating weight 9 further descends due to its own weight, and the operating shaft 10 also descends accordingly and comes into contact with the inclined surface 18' of the hook-shaped piece as shown by the dotted line in Figure 5, and then as shown in Figures 6 and 7. Then, the operating shaft 1 rotates the hook-shaped piece 16 counterclockwise against the tension of the tension spring 21, slides on the inclined surface 18, and descends, and the operating shaft 10 leaves the inclined surface. At the same time, the hook-shaped piece 16 is pulled by the spring 21 and rotates clockwise, so that the operating shaft 1 engages with the engaging portion 17 of the fishing-shaped piece as shown in FIGS. 8 and 9. Operating bell 9 at this point
is lowered to the position shown by the dashed line in FIG. When pulled, the actuating shaft 10 is locked to the upper surface 17a of the engaging portion, so that the device can be lifted up with the container released and the grips 6, 6' open. Next, when lifting a container, operate the crane to move the device in the state shown in Fig. 8 above the predetermined container, lower it, and bring the board 3 of the device into contact with the upper end of the container 23. The descent stops, but when the crane is further lowered, the actuating weight 9 descends under its own weight, and as a result, the actuating shaft 10G separates from the upper surface 17a of the locking part and moves downward, and at the same time, the oval-shaped piece 16 engages the spring 21. As a result, the actuating shaft is guided into the guide groove 19 as shown in FIG. 10.

Therefore, when the crane is operated and lifted at this point, the operating shaft 10 will not be locked to the upper surface 17a of the engaging portion, but will rotate the hook-shaped piece 16 clockwise against the presser spring 22. , as shown in FIG. 11, rises through the guide groove 19 and detaches from the fishing piece, the operating weight is pulled up, and along with this,
Grooves 13, 13' attached to the operating weight as shown in Figure 2
The lo-fu shafts 7, 7' of the levers 5, 5' that engage with the levers 5, 5' are pulled upward, and the grip fittings 6,
6' moves inward, grasps the container, and lifts it up. Incidentally, at the same time that the operating shaft 10 passes through the guide groove 19 and detaches from the hook-shaped piece 16 and rises, the copper-shaped piece 16 is moved by the repulsive force of the presser spring 22.
rotates counterclockwise and returns to the position shown in FIG. By repeating the above steps, the container can be automatically grabbed and released.

Since the present invention is configured as described above, according to the present invention, the hanging allowance is smaller than that of the conventional mechanical gripping device.
Moreover, since it can be automatically grasped and released by remote control, it is extremely easy to use a crane to lift and transport containers such as drums containing radioactive materials in glove boxes at nuclear facilities, nuclear material processing plants, etc. It is valid.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a mechanical gripping device according to the present invention;
The figure is a partially cutaway front view taken along the line A-A in FIG. 1, FIG. 3 is a cutaway view taken along the line B-B in FIG. 1, and FIG. Figures 5 to 11 are drawings showing the relationship between the operating shaft and the gold phrase pieces to explain the present invention. 1, 1'... Frame plate, 2, 2'... Slit, 3... Board, 5, 5'... Lever, 6, 6' ...Gripper, 9...
Operating bell, 10... Operating shaft, 11... Hanging fitting, 16... Fishing piece, 17... Engaging portion, 18
... Slanted surface, 19 ... Guide groove, 20 ...
... Pivot shaft, 21 ... tension spring, 22 ... presser spring. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11

Claims (1)

[Claims] 1. A working weight equipped with a hanging fitting is installed vertically movably between two symmetrical frame plates held in parallel with a vertical slit in the center, and the working weight is attached to the slit. An operating shaft that is engaged and protrudes from the side surface of the frame plate is attached, and an inclined surface on the side surface of the frame plate at a position below the operating shaft is formed at the tip on which the operating shaft slides, and the inclined surface is turned and engaged. A hook-shaped piece formed on the upper surface of the part and provided with a guide groove leading from the lower part of the engagement part to the upper part of the outer surface is pivoted upward, and the tension spring and the presser foot are provided with the hook-shaped piece attached to the frame plate. Through a spring, the tip of the inclined surface is positioned at a point where the tip slightly below contacts the descending operating shaft, and the operating shaft that descends and contacts the inclined surface is hooked against the tension spring. The piece is rotated, slides and descends on the slope, and at the same time as it leaves the slope, it engages with the engaging part of the rotating hook-shaped piece via a tension spring, and then the engaged operating weight is While lowering the hook, the hook-shaped piece is rotated via a tension spring to guide the operating shaft into the guide groove of the hook-shaped piece, and then, while rotating the hook-shaped piece against the presser spring, the operating weight is rotated. A mechanical grip characterized in that the actuating shaft is detached from the hook-shaped piece by being raised, and the vertical movement of the actuating weight drives a lever connected to the actuating weight to open and close the grip fitting. Opening/closing mechanism of the device.