JP2551766B2 - Diestuka lift magnet lifting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift magnet lifting device of a duster for supplying blank material to a press line.

2. Description of the Related Art A conventional stacker is installed on the blank supply side of a press line, and stacked stack blank materials are supplied to the press line one by one.

In addition, as shown in FIG.
Is provided with a magnet b which is moved up and down by means of these magnets b.
After being adsorbed, it is lifted to a certain height and carried into the press line.

Problems to be Solved by the Invention A conventional lifting device a has a movable member e which is vertically movable by a lift cylinder d, and a magnet b is attached to the movable member e via a plurality of supporting rods f. The weight of the movable part such as the movable member e is as heavy as about 450 kg. Therefore, even if it is detected that the magnet b has come close to the blank material c to be adsorbed and the descent by the lift cylinder d is stopped, the movable portion does not immediately stop due to the weight inertia of the movable portion, and as a result, the magnet b is There was a problem that the magnet b and the blank material c were damaged by colliding with the blank material c.

The present invention has been made for the purpose of improving the above-mentioned problems.

Means and Actions for Solving the Problems In order to achieve the above object, the present invention provides a movable member, which is movable up and down by a lift cylinder, at the upper part of a stand of a disstacker installed at a blank carry-in position of a press line. An upstream side of a guide rod is slidably supported by a movable member through a guide cylinder, and a lower support is fixed to the downstream side of the guide rod, and a tip of a piston rod of a soft-adhesion cylinder installed on the movable member. Is connected to the lower support to make the lower support movable up and down by the soft-adhesion cylinder, and the air pressure adjusted by the pressure adjusting valve is supplied to the bottom side of the soft-adhesion cylinder, and the lower support is A magnet support with a rod-shaped magnet attached to the lower surface of the body is pivotally attached via a pin so that it can contact the blank material at the top of the stack. At the same time, the soft-adhesion cylinder contracts and absorbs the lowering of the movable member, so that the gravity inertia of the movable member does not add to the blank material via the magnet, which causes the magnet to collide with the blank material and break, or The material will not be damaged.

Embodiment An embodiment of the present invention will be described in detail with reference to FIG.

In the figure, reference numeral 1 is a mount for a duster installed at a blank carry-in position of a press line (not shown).
The main body 2 of the lifting device is provided on the upper part of the.

The main body 2 has a lift cylinder 3 installed upright on a pedestal 1 with the piston rod 3a facing downward. The upper end of the upper support 4a of the movable member 4 is fixed to the tip of the piston rod 3a of the lift cylinder 3. ing.

A cylinder mounting seat 4b is provided at the center of the movable member 4 so that the piston rod 5a can be mounted on the cylinder mounting seat 4b.
Is attached downward and a soft-adhesion cylinder 5 made of an air cylinder is attached.

The central upper portion of the lower support 4c is fixed to the tip of the piston rod 5a of the soft attachment cylinder 5.

A pair of guide rods 6 project upward from both ends of the lower support 4c, and these guide rods 6 are also provided.
The upper end side of is slidably supported by guide cylinders 7 fixed to both ends of the movable member 4 via bushes 8.

Further, a bracket 4d is provided at the center of the lower surface of the lower support 4c, and the bracket 9a of the magnet support 9 is rotatably attached to the bracket 4d via a pin 10.

A magnet 12 is detachably attached to the lower surface of the magnet support 9 by a fastener 11 and an adjusting mechanism 13 for adjusting the angle of the magnet 12 is provided between the magnet support 9 and the lower support 4c. Has been.

The adjusting mechanism 13 includes a spring support bolt 13a and an adjusting bolt 13b that are provided so as to project from the lower support 4c toward the magnet support 9 side.
And a compression spring 13c fitted into the spring support bolt 13a, and the tip of the spring support bolt 13a is loosely fitted into a boss 13d fixed to the upper surface of the magnet support 9. Further, the head of the adjusting bolt 13b is in contact with the upper surface of the magnet support 9, and by rotating the adjusting bolt 13b, the angle of the magnet 9 can be adjusted about the pin 10 in the range from the solid line position to the virtual position. The adjusting position can be fixed by a lock nut 13e screwed to the adjusting bolt 13b.

On the other hand, on the bottom side of the lift cylinder 3 that moves up and down the movable member 4, a high air pressure is applied from the pressure source 15 via the pressure regulating valve 16 and the solenoid valve 17, and on the lock side via the pressure regulating valve 18 and the reaction air tank 19. The solenoid valve 17 detects the upper limit of the lift cylinder 3 and the lift switch detects that the piston (not shown) in the soft attachment cylinder 5 has started rising. It is adapted to be controlled by the output of the controller 22 which receives the signal from the start detector 21 as an input.

Air pressure is supplied from the pressure source 15 to the bottom side of the soft-adhesion cylinder 5 via a pressure regulating valve 23.

On the other hand, below the lifting / lowering device main body 2, as shown in FIG. 2, a skid 26 on which a stacked blank 25 is placed.
The skid 26 is moved up and down by a lifter 27.

Pressure source 1 on the rod side of lift cylinder 27a of lifter 27
The air pressure is supplied from 5 through the pressure regulating valve 28, the solenoid valve 29 and the speed control valve 30, and the bottom side is supplied with air pressure from the pressure source 15 through the pressure regulating valve 31 and the speed control valve 32. In addition, the blank material 25 stacked by the lift cylinder 27 is raised to a predetermined height, and between the pressure regulating valve 31 and the speed control valve 32 on the bottom side circuit, the adjustment screw 33 is used to adjust the piston 34a. A variable capacity cylinder 34 whose capacity can be freely changed by changing the position is connected. By changing the capacity of the variable capacity cylinder 34, the rising speed of the blank 25 and the shock at the time of stop can be freely adjusted. It is becoming like this.

Next, the operation will be described. When the solenoid valve 17 is switched to the position a to supply the blank materials 25 to the press line one by one by the duster installed upstream of the press line, the blank material 25 is supplied to the bottom side of the lift cylinder 3. The movable member 4 starts descending due to the air pressure and the pressure difference between the air pressure supplied to the rod side and the own weight of the movable portion.

At this time, the soft-adhesion cylinder 5 is in an expanded state by the low pressure air pressure supplied to the bottom side.

As the movable member 4 is lowered by the lift cylinder 3, a magnet is placed on the uppermost surface of the stacked blank 25.
When the magnet 12 comes into contact with the magnet 12, the soft-adhesion cylinder 5 shortens and absorbs the downward movement of the movable member 4 as the magnet 12 stops. Therefore, the weight inertia of the movable member 4 is not added to the magnet 12, and the magnet 12 is placed on the upper surface of the blank 25. Can be softly attached to.

On the other hand, when the piston of the soft wearing cylinder 5 starts to rise,
The rising start detector 21 detects this and sends a signal to the controller 22, so that the controller 22 switches the solenoid valve 17 to the position b.

As a result, the bottom side pressure of the wrist cylinder 3 is extracted, so that the pressure accumulated in the reaction tank 19 flows into the rod side of the lift cylinder 3 and pushes up the piston 3a of the lift cylinder 3, so that the magnet 12 The blank material 25 adsorbed on is lifted up to a predetermined height as the movable member 4 is raised, and is then carried into the press line by a carrying-in means (not shown).

The blanks 25 are carried into the press line one by one from the stacked blanks 25 by repeating the above operation.

Effect of the Invention As described in detail above, according to the present invention, the magnet provided on the movable member lowered by the lift cylinder comes into contact with the blank material at the top of the stack, and at the same time, the soft-adhesion cylinder absorbs the lowering of the movable member and moves Since the weight inertia of the member is prevented from being applied to the magnet, it is possible to solve the problem that the magnet collides with the blank material and is damaged, or the blank material is damaged.

In addition, the air pressure supplied to the bottom side of the soft-adhesion cylinder is
The pressing force of the magnet can be adjusted freely by adjusting with the pressure regulating valve according to the descending speed of the movable member and the size of the blank material. Even if the blank material changes, the blank material can be adsorbed and supplied to a press line or the like without generating indentations or scratches that cause quality deterioration on the surface of the blank material.

Furthermore, since the magnet is pivotally attached to the lower surface of the lower support through the magnet support, even if the blank material at the top of the stack is inclined, the magnet follows the surface of the blank material. The blank material can be surely attracted to the blank material, which can prevent misfeeds in advance, and the magnet is formed into a rod shape, so that the magnet evenly contacts the blank material. As a result, an unbalanced load does not act on the guide portion of the guide rod when pulling the blank material, so that the lower support can be smoothly moved up and down.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a configuration diagram of a lifting / lowering device main body, FIG. 2 is an explanatory diagram of a lifter, and FIG. 1 is a pedestal, 3 is a lift cylinder, 4 is a movable member, 5 is a soft-adhesion cylinder, 9 is a magnet support, and 12 is a magnet.

Claims (1)

(57) [Claims] 1. A movable member 4 which is movable up and down by a lift cylinder 3 is provided on an upper part of a gantry 1 of a destacker installed at a blank loading position of a press line, and a guide rod 6 is provided on the movable member 4 via a guide cylinder 7. Slidably supported on the lower end side of the guide rod 6, and a lower support 4c is fixed to the lower end of the guide rod 6, and the tip of the piston rod 5a of the soft attachment cylinder 5 installed on the movable member 4 is attached to the lower support. 4c, the lower support 4c is vertically movable by the soft-adhesion cylinder 5, and the air pressure adjusted by the pressure regulating valve is supplied to the bottom side of the soft-adhesion cylinder 5, and the lower support 4c is supplied. A lift magnet lifting device for a destacker, wherein a magnet support 9 to which a rod-shaped magnet 12 is attached is pivotally attached via a pin 10 to the lower surface of 4c.