JPS643567Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention is based on, for example, arranging a plurality of surface plates on which molds are placed in tandem in one direction, and pushing the rearmost surface plate with a pusher. In a casting line that transports metal in fixed pitches, after pouring, a weight placed on the mold is
This invention relates to a weight transfer device for a casting line that automatically removes the weight from a fixed position in the middle of the casting line and transfers it to another location.

(Prior Art) Conventionally, when molten metal is poured into a mold, a weight has been used to prevent the upper mold from floating as shown in, for example, Japanese Utility Model Publication No. 57-24425. On the other hand, casting work has gradually progressed from manual work to mechanization or automation of each process, resulting in greater labor savings. In the casting line where labor-saving has been promoted in this way, for example, as shown in Fig. 1, while the mold is being transported during casting, the weight placed on the mold is removed and moved to another location. transfer) is automatically performed. In the casting line shown in FIG. 1, a mold 1 on which a weight 50' (described later) is placed.
The upper mold and the lower mold are put together and placed at a predetermined position on a surface plate 2 formed into a rectangular flat plate having predetermined dimensions, and the surface plate 2 on which this mold 1 is placed is A plurality of molds are arranged so that they can slide linearly on rollers 3 with their front and rear ends in contact with each other in the mold conveyance direction indicated by arrow P in the figure. Then, move the rear end of the surface plate 2 placed at the rear end to the pusher 4.
is pushed by a distance L in the front-rear direction of the surface plate 2, that is, in the mold conveyance direction P, so that a plurality of molds 1 are simultaneously conveyed one pitch at a time.

The weight 50' used in such a casting line has locking parts 50'a, 50'a, 50'a, 50'a, 50'a, 50'a, 50'a, 50'a, 50'a, 50'a, 50'a, 50'a, 50'a, 50'a, 50'a, 50'a, 50', which protrude outwardly in opposition to each other, as shown in FIG. 2, for example.
0'b and a hole 50'c are formed on the mold 1, and the protruding direction of the locking portions 50'a and 50'b is along the mold transport direction P mentioned above, and
0'c is arranged so as to coincide with the sprue provided in the mold 1. Then, as the mold 1 is transported,
Each pitch is transported and removed from the mold 1 at a predetermined position in the middle of the casting line by a weight transfer device 100' attached to the casting line.

The weight transfer device 100' includes, for example, a support member 11 that slides on a rail 10 installed above the indoor space and is disposed at a removal position of the weight 50', and an elevator that is fixed to the support member 11. It has a base member 13 that is suspended and supported by a cylinder 12, and this base member 13 is arranged horizontally along the mold conveyance direction P.
Furthermore, a guide pole 14 extending downward from the support member 11 guides the vertical movement of the base member 13. Furthermore, the base member 13 is provided with the above-mentioned weight 5.
Clamp claw 1 having hook parts 16a and 17a that engage with locking parts 50'a and 50'b of 0', respectively.
The upper ends of 6 and 17 are pivoted, and
The rear end portions of expansion/contraction cylinders 18 and 19 are pivotally attached to the center portion of the base member 13. The distal ends of the expansion/contraction cylinders 18 and 19 are connected to the clamp claws 16 and 17, respectively, using engagement pins.

Based on this configuration, the weight 50' is placed in the mold 1.
When removing the support member 1 from the
1 is stopped at the position where the weight 50' is removed, the piston rod 12a of the lifting cylinder 12 is protruded, and the base member 13 is lowered to a predetermined position. and 17 are changed from the open state shown by the solid line in FIG. 1 to the closed state shown by the chain line. At this time, the clamp claws 16 and 1
The hook portions 16a and 17a of No. 7 are positioned below the locking portions 50'a and 50'b of the weight 50'. After that, when the piston rod 12a of the elevating cylinder 12 is pulled in, the hook portions 16a and 17a of the clamp claws 16 and 17 engage the weight 5.
The weight 50' is engaged with the locking portions 50'a and 50'b of 0' so as to sandwich them, the weight 50' is lifted, and the work of removing the weight 50' is completed. And after that,
By sliding the support member 11 along the rail 10, the weight 50' is moved to another location, for example, the work position where the casting operation is to be started, and thereby the work of transferring the weight 50' is carried out. Complete.

However, in the conventional weight transfer device of the casting line as described above, the pusher 4
The variation width of the stop position of the mold 1 being pushed by the mold 1 gradually increases, and the base member 13 placed at a fixed position on the casting line (mold conveyance line) and the weight 50' placed on the mold 1. As a result, the relative positions of the clamp claws 16 and 1 are shifted.
The hook parts 16a and 17a of No. 7 can no longer engage with the locking parts 50'a and 50'b of the weight 50',
There is a possibility that the weight 50' cannot be lifted or that the weight 50' falls off during transfer, and that the entire casting line may have to be stopped frequently.

(Purpose of the invention) In view of these points, the present invention automatically moves a weight placed on a mold placed on a surface plate in a casting line and transported in fixed pitches at a fixed position in the middle of the casting line. When removing the weight from the mold and moving it to another location, it is possible to absorb the relative positional deviation between the weight and the base member caused by variations in the machining dimensions of the surface plate and wear, and to ensure that the weight is removed from the mold. It is an object of the present invention to provide a weight transfer device for a casting line that can be removed in advance and prevent accidents such as falling off during weight transfer.

(Structure of the invention) The weight transfer device for a casting line according to the invention has a pair of locking parts that protrude inward from the upper ends of side walls facing each other, and is placed on a surface plate and fixed. In order to remove the weight, which is placed on the mold being conveyed pitch by pitch so that the protruding direction of the locking part is along the conveyance direction of the mold, at a fixed position, the support member installed at this fixed position is raised and lowered. A base member that can be supported, a lifting drive means that moves the base member up and down, and hook parts that are inserted inside the weight and are engaged with the locking parts on one side and the other side of the weight, respectively. A clamp claw member consisting of first and second clamp claws, one end of which is connected to the base member, the other end of which is connected to the first clamp claw, and is swung in the mold conveyance direction to form the first clamp. A first link member that moves the pawl in parallel to the mold conveyance direction, one end of which is connected to the base member, and the other end of which is connected to a second clamp pawl that swings in a direction opposite to the mold conveyance direction. a link mechanism consisting of a second link member that moves the second clamp claw in parallel in a direction opposite to the conveyance direction; one end is pivotally attached to the first clamp claw or the first link member; It is configured to include a telescopic drive means whose end is pivoted to the second clamp claw or the second link member and which operates the first clamp claw and the second clamp claw to expand and move away from each other. .

With this configuration, during the process of removing the weight and moving it to another location in the casting line, the weight generated due to variations in the machining dimensions and wear of the surface plate on which the mold is placed is reduced. The relative positional deviation between the weight and the base member is automatically absorbed, the weight is reliably engaged with the clamp claw member, and the weight can be reliably removed from the mold, and , it can be moved stably.

(Example) Hereinafter, an example of a weight transfer device for a casting line according to the present invention will be described with reference to the drawings.

FIG. 3 shows a weight transferred by an example of the weight transfer device for a casting line according to the present invention, with a part thereof cut away, and FIG. 4 shows a structure similar to that of the casting line shown in FIG. 1. An example of a weight transfer device for a casting line according to the present invention is shown together with a part of the casting line. In FIG. 4, parts corresponding to those shown in FIG. 1 are designated by the same reference numerals as in FIG. 1.

The weight 50 shown in FIG. 3 is formed into a box shape with an internal space, and a pair of weights 50 protrudes substantially horizontally inward from the upper ends of a pair of opposing side walls _50A and _50B . A hole 50c corresponding to the sprue of the mold 1 is formed in the bottom wall _50D in the same manner as shown in FIG. 2 described above. Then, this weight 50 is placed on the surface plate 2 and placed in the fourth position as shown in FIG.
On the mold 1 being conveyed in the direction of arrow P in the figure, the protruding direction of the locking parts 50a and 50b is
Therefore, holes 5 are formed along the mold transport direction and the opposite direction, and in the sprue (not shown) of the mold 1.
0c are arranged so that they match.

In the case of an example of the weight transfer device according to the present invention, which is installed to remove the weight 50 from above the mold 1 and transfer it to another location, as shown in FIG. A support member 11 is provided that slides on a rail 10 installed on the ceiling and stops at a position where the weight 50 is removed. An elevating cylinder 12 is fixed to this support member 11, and the piston rod 12a of the elevating cylinder 12 projects downward.
A base member 13 is connected to and supported at the tip of the base member 13 . The base member 13 is guided by a guide pole 14 extending downward from the support member 11 so as to be able to move up and down.

A link 21 is provided at the bottom of the base member 13.
~24 are arranged. These links 21-2
4, the upper ends of the pair of links 21 and 22 are fixed to the front part of the base member 13, and the lower ends of the links 21 and 22 are connected to the upper end of the clamp claw 26, respectively. The link 21 and the link 22 are pivoted with the same distance between the parts and the lower end in the mold conveyance direction P.
Both can be oscillated along the mold conveyance direction P. Furthermore, the upper ends of links 23 and 24, which form another pair of links 21 to 24, are attached to a bracket fixed to the rear part of base member 13, and the lower ends of links 23 and 24 are attached to clamp claws 27. Similar to the links 21 and 22 described above, the links 23 and 24 are pivotally attached to the upper end portions with equal distances between the upper end portions and the lower end portions along the mold conveyance direction P, respectively.
Both can be oscillated along the mold conveyance direction P.

The clamp claw 26 is provided with a hook portion 26a that projects in the mold conveyance direction P, and the clamp claw 27 is provided with a hook portion 27a that is used in the opposite direction to the mold conveyance direction P. Then, the clamp claws 26 and 2
The rear end of the expansion/contraction cylinder 30 is supported by a pin 31a on a bracket 31 fixed to the upper end of the clamp claw 26 so that the expansion/contraction cylinder 7 can be expanded in the mold conveyance direction P and the opposite direction. With,
To the bracket 32 fixed to the clamp claw 27,
The tip of the piston rod 30a of the expansion/contraction cylinder 30 is supported by a pin 32a.

In an example of a weight transfer device for a casting line according to the present invention configured as described above, the stop position of the weight 50 and the base member that occur due to variations in machining dimensions of the surface plate 2, wear, etc. 13, the base member 13 is moved from the raised position (indicated by the dashed-dotted line in FIG. 4), as shown by the dashed-dotted line in FIGS. 4 and 5.
When the piston rod 12a of the lifting cylinder 12 is projected and lowered and stopped at a predetermined position, the hook portions 26a and 27a of the clamp claws 26 and 27 are released.
is inserted inside the weight 50, and the weight 50
It is assumed that the area is located in the center of the area. Therefore, when the expansion/contraction cylinder 30 is operated in this state to cause the piston rod 30a to protrude by a predetermined length as shown in FIG. 5, the links 21 to 24 are swung in the mold conveyance direction P and the opposite direction. In conjunction with this, the clamp claws 26 and 27 move in the mold conveyance direction P and the opposite direction, are brought into an open state, and come into contact with the locking portions 50a and 50b of the weight 50. Thereafter, with the clamp claws 26 and 27 opened, the lifting cylinder 12 is operated to move the piston rod 1.
When 2a is pulled in, the hook parts 26a and 27
a engages with the locking portions 50a and 50b of the weight 50 and lifts the weight 50. As a result, the weight 50 is removed from the mold 1. Then, with the weight 50 suspended, the support member 11 is slid as necessary to transport the weight 50 to another location.

On the other hand, if there is a relative positional deviation between the actual stopping device of the weight 50 and the base member 13 due to variations in machining dimensions of the surface plate 2, wear, etc., that is, the weight 50 is not in the normal stopping position. If it does not stop, for example, as shown in FIG. 6, when there is a deviation of l between the actual stopping position and the regular stopping position of the weight 50 along the mold conveyance direction P, the base member 13 is in a lowered state. In this case, the clamp claws 26 and 27 are the weight 5.
It is displaced by l in the mold conveyance direction P with respect to 0. Therefore, when the expansion/contraction cylinder 30 is operated in this state to cause the piston rod 30a to protrude by a predetermined length, the clamp claw 26 comes into contact with the locking portion 50a, as shown by the dashed line in FIG. As the piston rod 30a continues to extend, the links 23 and 24 are swung in the opposite direction to the mold conveyance direction P, and the expansion/contraction cylinder 30 is swung around the pin 31a, and during this period, the clamp claw 27 moves in parallel with the links 23 and 24 and comes into contact with the locking portion 50b.

After that, when the lifting cylinder 12 is operated and the piston rod 12a is pulled in, the clamp claw 26
and 27 are the locking parts 50a and 5 of the weight 50, similar to when the weight 50 stops at the normal stop position.
0b, the weight 50 is lifted, and the weight 50 is removed from the mold 1. and,
The support member 11 moves along the rail 10, and the weight 5
0 is moved to another position.

As described above, an example of the weight transfer device for a casting line according to the present invention has both a tracking function and an automatic centering function, and the weight 50 is not stopped at the regular stop position and the base member Even if there is a relative positional deviation between the weight 50 and the weight 50, the deviation is absorbed by the cooperative operation of each component, ensuring that the weight 50
can be removed. In addition, in an example of a weight transfer device for a casting line according to the present invention, the clamp claw 2
6 and 27 from the closed state to the open state and project into the inside of the weight 50.
Since the hook portions 26a and 27a are of an inward expansion type that engages the hook portions 26a and 27a, the hook portions 16 and 17 that protrude to the outside of the weight 50 can be moved from the open state to the closed state as shown in FIG. Compared to a structure in which the hook portions 26a and 27a are engaged with the stop portions 50'a and 50'b, even if the size of the surface plate 2 is reduced, the clamp claws 26 and 27 can be attached to the adjacent weight 50. In addition, space can be saved without colliding with the mold or the like.

(Effect of the invention) As is clear from the above explanation, according to the weight transfer device for a casting line according to the invention, the weight placed on the mold that is placed on the surface plate and conveyed in fixed pitch increments. Even if there is a relative positional shift between the weight and the base member due to variations in the machining dimensions of the surface plate, wear, etc., the positional shift can be absorbed and reliably removed from the mold and separated. It can be carried to the position of As a result, it is possible to reduce the occurrence of a situation in which the entire casting line is stopped, and it is possible to improve the operational efficiency of the casting line. In addition, after inserting the hook portions of the two clamp claws into the inside of the weight, both clamp claws are expanded and the hook portions are engaged with the weight from the inside. Compared to a structure in which the weight is held from both sides, the size of the surface plate can be made smaller, resulting in a space-saving effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an example of a weight transfer device of a conventional casting line together with a part of the casting line;
FIG. 2 is a perspective view showing a weight used in the casting line shown in FIG. FIG. 4 is a schematic diagram showing an example of a weight transfer device for a casting line according to the present invention together with a part of the casting line, and FIGS. 5 and 6 are shown in FIG. 4. It is a figure provided for example operation explanation. In the figure, 1 is a mold, 2 is a surface plate, 11 is a support member,
12 is a lifting cylinder, 13 is a base member, 21-2
4 is a link, 26 and 27 are clamp claws, 30 is an expansion/contraction cylinder, 50 is a weight, and 50a and 50b are locking portions.

Claims (1)

[Scope of utility model registration request] A pair of locking portions are formed that protrude inward from the upper ends of the side walls facing each other, and the locking portions are projected in the above-mentioned direction onto the mold that is placed on a surface plate and conveyed in fixed pitch increments. In order to remove a weight arranged along the conveyance direction of the mold at a fixed position, a base member is movably supported by a support member installed at the fixed position, and a lifting drive for moving the base member up and down. a first clamp claw provided with a hook portion inserted into the inside of the weight and engaged with one of the locking portions of the weight; a clamp claw member consisting of a second clamp claw provided with a hook portion that engages with the other locking portion of the weight, and one end of which is connected to the base member and the other end of which is connected to the first clamp. first clamp claws each connected to the claws and swung in the conveying direction of the mold to move the first clamp claws parallel to the conveying direction;
a link member, one end of which is connected to the base member, the other end of which is connected to the second clamp claw, and is swung in a direction opposite to the conveyance direction of the mold to connect the second clamp to the second clamp. a link mechanism consisting of a second link member that moves the claw in parallel in a direction opposite to the conveying direction; one end is pivotally attached to the first clamp claw or the first link member, and the other end is connected to the first link member a casting line configured to include a telescopic drive means that is pivoted to the second clamp claw or the second link member and operates the first clamp claw and the second clamp claw to expand and move away from each other; weight transfer device.