JPS6040396A - Switching mechanism of mechanical type gripper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 system utilizes 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 grip the container. A gripping device is used, but in the past, this type of device had a large hanging allowance, making it very inconvenient to use in places with limited height.

The present invention solves these drawbacks, and provides an opening/closing mechanism for a mechanical gripping device that has a small hanging allowance and 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'
) is a symmetrical frame plate with a vertical slit (2) and a hole in the center, which is fixed to the board (3) and held in parallel by stay bolts (4) and (41). The main body is composed of angle-shaped levers +51 and +55, grip fittings +61 and +61 for grasping the container are fixed at one end through bolts and nuts, and a roller shaft (71) is fixed at the other end.
, t7i are provided, the tops of which are rotatably attached to shafts (81) provided at both ends of the main body.

(9) is an operating weight formed in the shape of a square plate, which includes a frame plate (1),
(It is provided in the middle of 1r so as to be movable up and down, and this operating weight has a slit +21, which engages with +m and connects the frame plate (1).
An operating shaft head protruding from the side is attached, and an operating weight (9
) is provided with a hanging metal fitting (11) on the upper end, and a plate thinner than the operating weight (9) is formed symmetrically on both sides of the upper part, and a lever (5) is provided on the upper end.
, (5), the groove a3 that engages with the roller shaft (7), t, H
．． A connecting plate (2) with 0, 0 is attached. α4,0
4 and ao, (14 are guide members protruding from the frame plate (1) and (15, respectively, facing each other in the vertical direction, and the operating weight (
9) while suppressing the lateral movement of the guide members α◆,
The connecting plate @, o5 is configured to slide within the slit formed between α~ and silicon θ4.

(JQ is a hook-shaped piece that is provided with an engaging part α that engages with the operating shaft aα, and at the tip thereof, the operating shaft descends through the slit (2) drilled in the frame plate and comes into contact with it. 00) is formed between the downwardly inclined surfaces on which it slides, and this inclined surface is further configured to turn and connect to the upper surface (17a) of the engaging portion. A guide groove α that guides the operating shaft (+01) is formed which leads to the upper outer surface of the hook-shaped piece from the side.The lower end of the hook-shaped piece is a shaft fixed below the slit (2) of the frame plate (1). A tension spring (
2I) so that it always rotates clockwise, and the rotation reaches the point where the slightly lower tip of the inclined surface 0-en comes into contact with the operating shaft head that has descended inside the slit (2). A presser spring (plate spring) with one end fixed to the frame board.
(Limited by 22.

(c) Indicates a container with a plate.

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

Figure 5 shows the relationship between the operating shaft U and the hook-shaped piece aQ when the crane hook (not shown) is attached to the hanging fitting αυ and the container is grasped and lifted. 9) is lifted upward, so the lever (5) is lifted as shown in Figure 2.
), the cylinder roller shaft (7), (71 is pulled upwards, so the shaft (8), (81 is the fulcrum), grip the metal fitting +61
, tea moves inward and the container is gripped. After moving the container lifted in this way to a predetermined position and landing it,
When the crane is further lowered to lower the hook, the device's board (3) comes into contact with the upper end of the container (c) and the device body stops descending, but the actuating weight (91) also descends under its own weight and At the same time, the operating shaft head also descends and comes into contact with the inclined surface (end) of the hook-shaped piece as shown by the dotted line in Fig. 5, and then, as shown in Figs. While rotating the hook-shaped piece H in the counterclockwise direction against In order to rotate clockwise, the operating shaft head engages with the engaging portion aη of the hook-shaped piece as shown in Fig. 8.9.At this point, the operating weight (
9) descends to the position shown by the dashed line in Figure 2, and (5), (
5) is pushed down, so the scissors +61, +[
31 moves outward and the grip is released. Therefore, if you operate the crane in this state and pull the operating jaw (9), the operating shaft 0 (1 will be locked on the upper surface (17g) of the engaging part) , the device lifts the container with the grips (6) and (61) open.

Next, when lifting the container, operate the crane and
When the device in the state shown in the figure is moved above the predetermined container and lowered, and the device board (3) comes into contact with the top 91kl of the container (c), the device body will stop descending, but if the crane is lowered further, The actuating weight (9) descends under its own weight, and the actuating shaft a moves downward away from the upper surface of the locking part (17a), and at the same time, the hook-shaped piece QG is attracted by the spring QD and rotates clockwise. Therefore, as shown in FIG. 10, the operating shaft 00) is guided into the guide groove Q group. Therefore, when the crane is operated and lifted at this point, the operating shaft tlol will not be stopped by the upper surface (17a) of the engagement part, and the presser spring (
2 While rotating the hook-shaped piece (Ll clockwise) against hot water,
As shown in FIG. 11, the (guide m , α4
The roller shafts (7), (7) of the levers (5), (5) that engage with the
) is pulled upward, and the gripping fittings +61 and +6'l move inward using the shafts +s+ and +8) as fulcrums to grasp and lift the container. In addition, the operating shaft side is the guide '1+' + J 0
The hook-shaped piece passes through 0 (separated from 10 and rises at the same time,
Due to the repulsive force of the presser spring 4, the hook-shaped piece Qfj is rotated counterclockwise and returned 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, the present invention is softer than conventional mechanical gripping devices, has a small hanging allowance, and
Moreover, it can be grasped and released automatically by remote control, so it is extremely effective, especially when using a crane to lift and transport containers such as drums containing radioactive materials in glove boxes at nuclear facilities, nuclear fuel processing plants, etc. It is.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a mechanical gripping device d according to the present invention, FIG. 2 is a partially cutaway front view taken along line A-A in FIG. 1, and FIG.
The figure is a cross-sectional view taken along line B-B in Figure 1, Figure 4 is a front view and side view of the hook-shaped piece, and Figures 5 to 11 are views of the actuating shaft and the hook-shaped piece to explain the present invention. It is a drawing showing the relationship.

Claims (1)

[Claims] A working weight equipped with a hanging fitting is provided in the middle of two symmetrical frame plates held in parallel with a vertical slit in the center, and is movable up and down, and the working weight is attached to the slit. An operating shaft is fitted and protrudes from the side surface of the frame plate, and an inclined surface on the side surface of the frame plate at a position below the operating shaft is formed at its tip on which the operating shaft slides, and this inclined surface is turned to form an engaging portion. A hook-shaped piece formed on the upper surface and having a guide groove leading from the lower part of the engagement to the upper part of the outer surface is pivoted upward, and a tension spring and a presser spring to which the hook-shaped piece is temporarily attached to the frame are attached. Through,
The tip of the inclined surface is configured such that the tip thereof is located at a point where it comes into contact with the descending operating shaft, and the hook-shaped piece is rotated against the tension spring so that the operating shaft that descends and comes into contact with the inclined surface is rotated. Tsutsu,
The inclined surface is slid and lowered, and at the same time as the inclined surface is removed, it is engaged with the engaging portion of the rotating hook-shaped piece via a tension spring, and the engaged operating weight is further lowered, and the The hook-shaped piece is rotated to guide the operating shaft into the guide groove of the hook-shaped piece, and then, while the hook-shaped piece is moved around against the presser spring,
The actuating shaft is detached from the hook-shaped piece by raising the actuating weight, and the vertical movement of the actuating weight drives a lever connected to the actuating weight to open and close the grip. Opening/closing mechanism of mechanical gripping device.