JPS626769A - Weight removing device for pouring line - Google Patents

Abstract

PURPOSE:To absorb the positional deviation in the conveying direction of a weight and to surely clamp the weight by providing a stationary clamp and movable clamp to a movable member and engaging and disengaging the weight on a casting mold by means of both clamps according to the backward movement of the movable member. CONSTITUTION:The movable member 18 is driven backward when the casting mold 6 carrying the weight 7 comes to a weight removing station. Then an oscillation lever 23 contacts with the weight 7 and the member 18 stops so that the movable clamp 22 is driven to a close position. Both engaging pawls 21a, 22a of the stationary clamp 21 are the movable clamp 22 are thereby engaged with an engaging flange 7a of the weight 7. A base plate 15 is thereafter raised to remove the weight 7 from the mold 6 and the clamped weight is conveyed to a weight imposing station. The base plate 15 is lowered to impose the weight 7 on the mold 6 and the clamp 22 is brought to an open position. The movable member 18 is then driven to disengage the clamp 21.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a weight unloading device for a pouring line for unloading or removing a weight placed on a mold into which metal is poured. It is something.

(Prior art) In the #8 type pouring line, metal is poured into a mold conveyed by a conveyor, or this mold generally consists of an upper mold and a lower mold, and the mold is poured into the mold. There is a risk that the upper mold may be lifted by the molten metal. For this reason, a weight is placed on the mold before pouring to prevent the upper mold from floating, and the weight is unloaded from the mold after the molten metal has solidified.

The above-mentioned weight will be placed on the mold again before pouring after unloading, and for this reason, the weight between the weight loading station and the weight unloading station in the pouring line will be Either a weight transfer device for loading and one for unloading is provided, or a weight transfer device for directly carrying out the process from unloading to loading is provided. Conventionally, a weight conveying device having such an unloading function includes a pair of front and rear movable ramps (swinging clamps) that are movable in a plane parallel to the conveying direction of the mold at an unloading station.

A pair of front and rear movable clamps engage the flange-shaped engagement portions formed at the front and rear ends of the weight from the front and back directions (
clamp).

(Problem to be Solved by the Invention) By the way, the conveyor for transporting the mold after pouring only needs to transport the mold to a predetermined location while ensuring cooling time. The feed pitch is imprecise, which tends to cause problems such as misalignment of the mold or weight at the unloading station, which prevents the pair of movable clamps from properly clamping the weight. Ta.

To explain this point in detail, the mold is placed on a conveyor and conveyed via a surface plate having predetermined front and rear dimensions. The mold is placed on the conveyor by intermittent feeding while accurately capturing the position of the mold by a conveyor that locks the surface plates one by one and accurately feeds them with a fixed stroke.
Placing a weight on the mold and pouring the metal into the mold are controlled so that the mold stops at a predetermined position.

On the other hand, the conveyor that transports the mold after pouring the metal uses, for example, a pusher that moves in a predetermined stroke.
Since the molds (weights) are simply conveyed intermittently by pressing surface plates that contact each other in the conveyance direction on the conveyor conveyor, molds (weights) may not be properly positioned at the unloading station due to wear of the surface plates, dimensional errors, etc. It wasn't something that stopped. In this way, at the unloading station, if the mold, or the weight, is misaligned in the transport direction, even if the pair of movable clamps is operated to clamp the weight, the clamping will not work properly. Otherwise, a situation where clamping would not be possible would occur.

Therefore, an object of the present invention is to provide a pouring system that can absorb this positional deviation and reliably clamp the weight, even if the mold, that is, the weight, is displaced in the transport direction at the unloading station. The purpose of the present invention is to provide a line weight unloading device.

(Means and operations for solving the problems) In order to achieve the above-mentioned object, the present invention has the following configuration. In other words, there is a weight conveying device that lifts and removes the weight on the mold between the weight unloading station on the pouring line and a fixed position station outside the unloading station.
The weight conveyance device is provided with: a movable member movable in the conveyance direction of the mold in the unloading station; a drive means for moving the movable member back and forth in the conveyance direction; a fixed clamp that engages with the front end of a weight on the mold in response to backward movement of the movable member; and a fixed clamp provided on the movable member at a predetermined distance from the fixed clamp on the rear side of the fixed clamp. , a movable clamp that is engaged with and detached from the rear end of the weight on the mold.

With this configuration, when the movable member is moved backward from its front stroke end (the most forward position in the conveyance direction) with the movable clamp open, the fixed clamp will eventually move against the front end of the weight. If the fixed clamp is engaged with the weight and the movable clamp is closed, the movable clamp will be reliably engaged with the rear end of the weight.

In other words, as the movable member moves, the fixed clamp is first positioned with respect to the front end of the weight. Closing the ramp ensures that it is engaged with the rear end of the weight.

Of course, since there is no longer a weight on the mold in front of the unloading station, when the aforementioned fixed clamp is engaged with the front end of the weight, there is no interference between the fixed clamp and the weight. No problems will arise.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, a pouring line A is constructed by combining three conveyors 1.2.3, first to third. The first transport conveyor 1 performs transport from the left to the right in the figure, and the third transport conveyor 3 is arranged parallel to the first transport conveyor 1 and transports from the right to the left in the figure. The 21j transport conveyor 2 is configured to transport from the end of the first transport conveyor 1 to the start end of the third transport conveyor 3. The first conveyor 1 is sequentially provided with a mold placement station S1, a weight placement station S2, and a pouring station S3 from the upstream side to the downstream side (from the left side to the right side in the figure), Also the 21st
The conveyor 2 is provided with a weight unloading station S4 on the side of the weight loading station S2.

A weight conveying device 4 is provided between the weight loading station S2 and the weight unloading station S4.

The first conveyor l includes a mold mounting station S.
After the surface plate 5 is set on the front side of the mold 1, the mold 6 is placed at the mold placement station S1. and,
After the weight 7 is placed on the mold 6 at the weight placement station S2, molten metal is poured into the mold 6 at the pouring station S3. The mold 6 into which this molten metal is poured is a weight 7
The molten metal placed thereon is conveyed from the first conveyor 1 via the second conveyor 2 to the third conveyor 3, and the molten metal is cooled and solidified before reaching the weight unloading station S4. . Then, at this unloading station S4, the weight 7 is unloaded from the top of the mold 6 by the weight transfer device 4, and the weight 7 removed from the top of the mold 6 is placed on the weight by the weight transfer device 4. transported to the storage station S2,
It will be placed again on the mold 6 before pouring. Of course,
As shown in FIGS. 2 and 3, the mold 6 is composed of an upper mold 6A and a lower mold 6B, and a weight 7 prevents the upper mold 6A from rising from the lower mold 6B after pouring. This will prevent this.

Note that the first conveyor 1 is controlled so that the mold 6 stops at a predetermined position of each station S1, S2) and S3, as in the conventional case. On the other hand, the third conveyor 3
For example, the mold 6 (weight 7) is conveyed by pressing a large number of surface plates 5 by the feed pitch (set to the longitudinal length of the surface plate 5) using a pusher. Even if the feed pitch of the bushing is constant, the mold 6 (weight 7) does not necessarily stop at a predetermined position at the unloading station S4 due to wear, dimensional errors, etc. This makes it easy for deviations to occur.

The weight conveying device 4 will be described in detail with reference to FIGS. 2 and 3. As shown in FIG.
uses the wheels 12 to install the weight mounting station S.
2 and the unloading station S4.
3, and is driven back and forth between the two stations S2 and S4 by a cylinder device or the like (not shown).

The lifter 11 is provided with a cylinder device 14 for lifting and lowering, and a base 15 disposed below the lifter 11 is raised and lowered by the cylinder device 14 while being guided by a guide rod 16. There is. This base 15 has
A rail 17 extending in a direction perpendicular to the rail 13, that is, the conveyance direction of the third conveyor 3, is integrally provided, and a movable member 18 in the form of a trolley has wheels 1.
It is held on the base 15 so that it can run freely along the rails 17 using the rails 9. The movable member 18 is
The cylinder device 20 held on the base 15 is configured to reciprocate in the front-rear direction (left-right direction in FIG. 2) along the rail 17.

The movable member 18 has a front end (the left end in FIG.
A fixed clamp 21 is provided at the downstream end of the third TI conveyor 3 in the transport direction, and a movable clamp 22 is provided at the rear end. The fixing clamps 21 are provided, for example, in a pair on the left and right with an interval in the direction perpendicular to the conveying direction of the third conveyor 3, and have a tip (lower end) that engages the weight 7 on the mold 6. An engaging claw portion 21a that engages with the mating flange 7a is formed. That is, in the state shown in FIG. 2 in which the base 5 is in the lowered position by the lifting cylinder device 14, the fixed clamp 2
1 is arranged so as to be able to come into contact with the front end surface of the weight 7 on the mold 6, and the engaging claw portion 21 in this contact or in the state immediately before contact.
a is located directly below the engagement flange 7a.

Note that the swing lever 23 is attached to the pin 2 of the fixed clamp 21.
The movable member 18 is provided with a limit switch 25, and the engaging claw portion 21a of the fixed clamp 21 is attached to the engaging flange 7 of the weight 7.
In the engaged state located directly below a, this swing lever 23
The limit switch 25 is activated by being swung when one end comes into contact with the front end surface of the engagement flange portion 7a, and the fixed clamp 21 is engaged with the weight 7 due to the operation of the limit switch 25. is now being detected. Of course, the swing lever 23 is normally connected to the limit switch 25 by a return spring (not shown).
It is biased in the non-operating direction, that is, counterclockwise in the figure $2.

On the other hand, the movable clamp 22, as shown in FIG.
It has a pair of left and right tough lamp claws 22A, and each of the clamp claws 22A is swingable about a mounting bolt 26 extending in the conveyance direction of the third conveyor 3 with respect to the rear end surface of the movable member 18. 3 is able to swing freely within a plane perpendicular to the conveyance direction of the conveyor 3. One end of an intermediate lever 28 is rotatably attached to each clamp claw 22A by a pin 27, and the other end of the intermediate lever 28 is attached by a pin 29 to a bell crank type drive. It is connected to the lever 30 in a rotational manner. The driving lever 30 is mounted by a mounting port 31 extending in the conveyance direction of the third conveyor 3.
It is rotatably attached to the rear end surface of the movable member 18 and is driven to swing by a cylinder device 32 provided on the movable member 18 . Then, in response to the expansion and contraction movement of the cylinder device 32, that is, the swinging movement of the driving lever 3o, the pair of clamp claws 22A are moved via the intermediate lever 28.
However, it can take a closed position shown in solid lines in FIGS. 2 and 3 and an open position shown in dashed lines in FIG.

Of course, an engaging claw portion 22a is formed at the tip of each of the clamp claws 22A.
2A is set to have a spacing slightly larger than the length of the engagement flange 7a of the weight 7 with respect to the fixed clamp 21 in the conveyance direction of the third conveyor 3. As a result, when the fixed clamp 21 is engaged with the front end of the retaining flange 7a of the weight 7, the engaging claw portion 21a of the clamp claw 22A in the closed position is engaged with the engaging flange 7a of the weight 7.
(See Fig. 2).

Next, the operation of the above configuration will be explained.

First of all, heavy@! As a preliminary step to the unloading of the weight unloading station S4, with the lifter 11 on the weight unloading station S4, the base 15, that is, the movable member 18 is brought to the raised position by the lifter II (its cylinder device 14), and
The movable member 18 is located at the forward stroke end (the left stroke end in FIG. 2), and the movable clamp 22 is at the open position. In this state, when the mold 6 on which the weight 7 is placed comes to the weight unloading station S4, the lifter 11 lifts the base 1
5, the movable member 18 is lowered (see arrow ■ in Figure 2), and then the movable member 18 is driven rearward (
(See arrow ■ in Figure 2). Due to this backward movement of the movable member 18, one end of the swing lever 23 eventually comes into contact with the front end surface of the engagement flange 7a of the weight 7, and the limit switch 25 is activated. The actuation of the limit switch 25 causes the movable member 18 to stop, and subsequently drives the movable clamp 22 to the closed position. As a result, the re-engaging claw portion 21 of the fixed clamp 21 and the clamp 22 is connected to the front and rear ends of the engagement flange 7a of the weight 7.
a, 22a are engaged or clamped.

Thereafter, by lifting the base 15 with the lifter 11, the weight 7 is unloaded from the mold 6, and the clamped weight 7 is transported to the weight mounting station S2. Of course, the transported weight 7 is moved back and forth by moving the movable member 18 back and forth to a predetermined position according to the mold 6 at a predetermined position at the weight placement station S2. After the position of the mold 6 is adjusted, the base 15 is lowered to place the weight 7 on the mold 6 at the mounting station S2.

After this placement, after the movable clamp 22 is brought to the open position, the movable member 1 is moved in the direction in which the fixed clamp 21 disengages from the locking flange 7a of the weight 7 (leftward in FIG. 1).
After driving the weight 8, the base 15 is raised and the weight is returned to the weight unloading station S4.

In this way, the weight 7 located at the unloading station S4 is transported and placed on the mold 6 located at the mounting station S2.

Here, at the unloading station S4, the front and rear positions of the single weight 7 (horizontal and horizontal positions in FIG. 3) often shift to some extent, but this position shift is prevented by the action of the movable member 18 shown by the above-mentioned arrow ■. Absorbed and unloading station S
4, the weight 7 on the mold 6 is securely clamped.

In addition, if the movable clamp 22 is made to move within the upper surface orthogonal to the third conveyor 3 as in the embodiment, this movable clamp for the next weight 7 located after the unloading station 54(7)f 22 (clamp claw 22A
) is even more advantageous in preventing interference. In other words, it is possible to reduce the conveyance pitch of the mold 6 (weight 7) on the third conveyor 3, that is, the longitudinal length of the surface plate 5 as much as possible.

In addition, in the above embodiment, the weight transfer device 4 was described as one that performs unloading and loading continuously, but considering the distance between both stations, an idle station is provided between both stations, and a dedicated unloading device is provided. Of course, it may also be used as a conveyance device.

(Effects of the Invention) As is clear from the above description, the present invention can absorb displacement of the weight at the weight unloading station and reliably clamp the weight.

[Brief explanation of drawings]

1A is a simplified plan view showing an example of a pouring line to which the present invention is applied. FIG. 2 is a side view showing one embodiment of the present invention. FIG. 3 is a view taken in the X direction of FIG. 2. A: Pouring line S2: Weight loading station S3: Pouring station S4: Weight unloading station 1.2.3: 4f! l Sending conveyor 4: Weight conveying device 5: Surface plate 6: Mold 6A: Upper mold 6B: Lower mold 7: Weight 7a Miko mating flange 17 Nirail 18: Movable member 20 Niji cylinder device (for movable member) 21: Fixed clamp 21a: Engagement claw portion 22 2 Movable clamp 22A: Clamp claw 22a: Engagement claw portion 32 Nigilinder device (movable clamp ■)

Claims (2)

[Claims] (1) There is a weight conveyance device that lifts and takes out the weight on the mold between the weight unloading station of the pouring line and a fixed position station outside the unloading station, and the weight conveyance device performs the steps described above. a movable member movable in the conveyance direction of the mold in the unloading station; a drive means for moving the movable member back and forth in the conveyance direction; , a fixed clamp that is engaged with the front end of the weight on the mold, and a fixed clamp that is provided on the movable member at a predetermined distance from the fixed clamp on the rear side of the fixed clamp, and that is connected to the rear end of the weight on the mold. 1. A weight unloading device for a pouring line, comprising: a movable clamp that is engaged with and detached from a part; (2) According to claim 1, the movable clamp is movable in a plane perpendicular to the conveying direction of the mold in the unloading station.