JPH0247306B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a drawing device in centrifugal casting equipment.

Conventional Structure and Problems There is a drawing device in centrifugal casting equipment that uses a drawing cart to pull out a cast product from a stationary rotating metal frame. As such a pulling device, the special public
There is a device shown in Publication No. 16969, which has a chucking device that grips a tube as a cast product from the inside, and this chucking device grips the tube from the inside. A plurality of claws are arranged in a radial manner so that each claw is pressed against the inner surface of the tube. However, in such a conventional structure, since the opening/closing range of the claws is relatively narrow, it is difficult to deal with changes in the diameter of the cast product, and furthermore, the large number of claws makes it difficult to downsize.

Purpose of the invention Therefore, the present invention solves the above problems,
To obtain a drawing device which can satisfactorily cope with large changes in the diameter of a cast product and has a small and simple configuration.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides: A pull-out cart that can move towards and away from one end of a rotating metal frame in the axial direction of the metal frame, an arm inserted into the metal frame, and a tip end of the arm. a fixed claw attached to the metal frame and abutting the lower inner surface of the cast product in the metal frame; a link member with one end swingably attached to the fixed claw; and an opening/closing claw swingably attached to the other end of the link member. and a cylinder device connected to the opening/closing pawl and swinging the opening/closing pawl to press it against the upper inner surface of the cast product.

Therefore, when the cylinder device is operated to press the swinging claw against the upper part of the inner surface of the cast product, the fixed claw is also pressed against the lower part of the inner face, making it difficult to grip the cast product. By moving the pull-out cart, it becomes possible to pull out the cast product from the rotating metal frame. At this time, since both claws and the link member can be constructed of only a single member, the structure can be made small and simple. In addition, the opening/closing pawl swings in two stages via a link member around the fixed pawl located at the lower part of the inner surface of the casting, making it possible to open and close it greatly, and the diameter of the casting can be changed significantly. It also becomes possible to follow the target image well. Furthermore, since the opening/closing pawl is curved in the longitudinal direction of the metal frame, it can always come into smooth contact with the upper inner surface of the casting even if the diameter of the metal frame changes. The distance in the axial direction of the cast product from the point where the opening/closing claw contacts the lower inner surface of the cast product to the point where the opening/closing claw abuts the upper inner surface of the cast product can be reduced, so that the line connecting these two points and the center of the cast product It becomes possible to always make the angle formed by the two ends larger than a certain degree regardless of the diameter of the cast product, and the cast product can be gripped with sufficient gripping force.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In Figures 5 and 6, reference numeral 1 indicates a rail laid at the position where the cast product is pulled out, and a pull-out trolley 2
and the tube support cart 3 are allowed to travel. A loading installation position 5 for a rotary metal frame 4 is formed on one end side of the rail 1, and this rotary metal frame 4 is mounted on a hanging balance so that the socket side of a centrifugal cast pipe 6 as a cast product faces the drawing cart 2. It is designed to be brought in and taken out at 7pm.

A travel drive device 8 for the pull-out truck 2 is provided on the other end side of the rail 1. That is, the drawing cart 2 is driven to run by being pulled by the feeding wire 9 and the drawing wire 10, and 11 is a winding drum for both the wires 9 and 10;
2 is a motor for driving the drum 11, and 13 is a speed reducer. 14 and 15 are guide sheaves on which the wires 9 and 10 are hung.

An air cylinder 16 as a cylinder device is mounted on the pull-out truck 2, and 17 is an air hose for supplying air to the air cylinder 16, which is guided to a messenger wire 18 installed along the rail 1. It is supported by a pulley type cable carrier 19. 20 is a travel drive device 8
This is a post for the messenger wire installed at the position of . In the pull-out truck 2, 21 is a column for supporting the air hose 17, and 22 is a heat shield plate for preventing the air hose 17 from receiving radiant heat from the pipe 6.

The tube support cart 3 is disposed between the pull-out cart 2 and the rotating metal frame 4 and is movable on the rail 1, and is pushed by the pull-out cart 2 and moved toward the rotating metal frame 4 side. While supporting the socket 23 of the pipe 6 pulled out, the travel drive device 8 is pushed by this pipe 6.
It is starting to be moved to the side. The rail portion 24 in the vicinity of the travel drive device 8 is formed lower than other portions, and when the tube support truck 3 descends to this rail portion 24 through the inclined portion 25,
The pipe 6 is designed to be passed from the pipe carrier 3 onto a kick-out pawl 26 between the rails 1. Reference numeral 27 denotes a carry-out rail provided perpendicular to the rail 1, which receives the tube 6 fed out from above the rail 1 by the action of the kick-out claw 26, and can be carried out to the next process.

Next, the configuration of the pull-out truck 2 will be explained in detail. 1st
As shown in FIGS. 3 to 3, a pair of bearings 28 is provided at the upper front side of the pull-out truck 2, and the front end of a swing frame 29 disposed between both bearings 28 is attached to a support shaft 3.
It is swingably supported at 0. The rear side of the swing frame 29 is placed on the pull-out truck 2, so that the swing frame 29 can swing only toward the front side of the pull-out truck 2, that is, toward the rotating metal frame 4 side.

A bearing 31 is provided within the swing frame 29, and the base end portions of a pair of arms 32 that can be inserted into the rotary metal frame 4 are swingably supported by the bearing 31. A stopper 33 is provided on the swing frame 29, and is engaged with the arm 32 to support the arm 32 in a substantially horizontal state. Arm 32
At the tip, there is a fixed claw 3 that comes into contact with the lower part of the inner surface of the tube 6.
4 is provided. That is, this fixed claw 34
The outer surface is curved to match the inner surface of the tube 6,
And regardless of the angle of the arm 32, its entire surface is connected to the pipe 6.
The tip of the arm 32 is swingable so as to come into contact with the inner surface of the arm 32. 35 is a mounting pin.

One end of a pair of link members 36 is swingably attached to the attachment pin 35, and an opening/closing pawl 37 is swingably attached to the other end of the link member 36. As shown in FIG. 3, the opening/closing claw 37 has an outer surface curved to match the inner surface of the tube 6 like the fixed claw 34, and is also curved in the longitudinal direction of the tube 6 as shown in FIG. As shown in FIG. 1, the tip is shaped like a bifurcated fork in plan view.

Reference numeral 16 designates the aforementioned air cylinder, which is swingably attached to the swing frame 29, and its working rod 38 is connected to the vicinity of the proximal end of the opening/closing claw 37 through between the forks of the opening/closing claw 37. . The opening/closing claw 37 is opened by the action of the air cylinder 16 and is pressed against the upper inner surface of the tube 6. The outer surface of the opening/closing claw 37 has irregularities (not shown) to increase the frictional force when pressing. ) is formed.

FIG. 4 shows the open/close state of the opening/closing claw 37. That is, the opening/closing pawl 37 is swung around the mounting pin 35 and the link member 36 by the action of the air cylinder 16, and its opening degree changes according to the diameter of the tube 6. In addition, since the tube 6 is curved in the longitudinal direction as described above, the tube 6
Even if the diameter of the tube 6 changes, it can always contact the upper inner surface of the tube smoothly, and even if the diameter of the tube 6 is small as shown in FIG. Opening/closing claw 37 at a position where the distance in the direction is small
can be brought into contact with the upper inner surface of the tube 6.

Next, the drawing operation will be explained. First, with the pull-out truck 2 and tube support truck 3 waiting near the travel drive device 8, the rotary metal frame 4 with the tube 6 formed after centrifugal casting is completed is carried into the carrying-in installation position 5. ,
Thereafter, the pull-out cart 2 is moved to approach the rotary metal frame 4. As a result, the tube support cart 3 is pushed by the pull-out cart 2 and approached the rotary metal frame 4.
In this running state, as shown in FIG. 6, the swing frame 29 is placed on the pull-out truck 2, and the opening/closing claw 37 is in the closed state. Further, as shown in FIG. 2, the arm 32 is locked by a stopper 33, so that the arm 32 and the opening/closing claw 37 are held in a substantially horizontal state and inserted into the tube 6 of the rotating metal frame 4. be done. At this time, the second
As shown by the imaginary line in the figure, the fixing claw 34 is suspended from the inner surface of the tube 6.

Once both claws 34 and 37 have been inserted into the tube 6, the pull-out cart 2 is stopped. As a result, the tube support carriage 3 is also stopped and stands by in the immediate vicinity of the rotating metal frame 4. Next, when the air cylinder 16 is operated to open the opening/closing pawl 37, the opening/closing pawl 37 first comes into contact with the upper inner surface of the tube 6, as shown in FIG.
After that, when the air cylinder 16 is further operated,
The fixed claw 34 is pushed downward by the reaction force from the opening/closing claw 37, and the arm 32 and swing frame 29 swing together, causing the fixed claw 34 to come into contact with the lower inner surface of the tube 6. As a result, the claws 34 and 37 are pressed against the inner surface of the tube 6 and grip the tube 6.

Then, the drawing cart 2 is moved in a direction away from the rotating metal frame 4, and the tube 6 is gradually pulled out from the rotating metal frame 4. Then, the socket 23 of the tube 6 is supported by the tube carrier 3, and conversely, the tube holder 3 is pushed and moved by the tube 6 while being pulled out. The insertion port of the tube 6 is supported by the rotating metal frame 4. When the pull-out cart 2 passes through the inclined part 25, it will be inclined according to the inclined part 25, but at this time, the swing frame 29 is relatively swung around the support shaft 30, and is in a substantially horizontal state. maintained. Therefore, the tube 6 is pulled out horizontally without being tilted.

When the tube support truck 3 descends the inclined portion 25,
The insertion of tube 6 has also been pulled out, and the tube 6 has been removed as described above.
is passed onto the kickout pawl 26. Therefore, the air cylinder 16 moves the opening/closing claw 37 to close, and the fixed claw 3
4 is again separated from the inner surface of the tube, the tube 6 stops moving, only the pull-out cart 2 moves, and both the claws 34 and 37 are pulled out from the tube 6. Thereafter, the pull-out truck 2 is stopped, and the tube 6 is sent out onto the carry-out rail 27 by the kick-out claw 26. Remaining rotating metal frame 4
is carried out using a hanging balance 7.

As shown in FIG. 4, tubes 6 in rotating metal frames of various diameters are carried into the carrying device position 5.
According to the present invention, the opening/closing pawl 37 is opened and closed in two stages via the link member 36, so that it can be opened wide and folded down small, and can respond favorably to the above-mentioned change in diameter. Further, the opening/closing claw 37 is formed to be curved in the longitudinal direction of the rotary metal frame 4, that is, the tube 6, and as shown in FIG. can come into contact with the upper part of the inner surface of the tube 6 at a small position, so the angle between the line connecting the upper and lower gripping parts on the inner surface of the tube 6 and the tube axis is always set regardless of the diameter of the tube 6. It can be made larger than a certain level. Therefore, a large gripping force can always be generated not only when the diameter of the tube 6 is large but also when the diameter is small, and there is no shortage of gripping force. Moreover, since it can be folded into a small size, it can be inserted into a pipe 6 with a particularly small diameter without any problem, and can be pulled out. Also,
It is not necessary to provide a plurality of the claws 34, 37 and the link member 36, and since they can be composed of only a single member, the structure can be small and simple.

Effects of the Invention As described above, according to the present invention, since the opening/closing pawl opens and closes in two stages, the opening/closing range can be widened, and therefore, even if the diameter of the cast product changes greatly, it can be accommodated well. In addition, since the opening/closing pawl is curved in the longitudinal direction of the metal frame, it is not only possible to always smoothly contact the upper inner surface of the cast product even if the diameter of the metal frame changes, but also the fixed pawl and opening/closing pawl This makes it possible to always make the angle formed by the line connecting the contact points on the inner surface of the cast product with the axis of the cast product to a certain degree or more, regardless of the diameter of the cast product. Even if it is a large object, it can be gripped with great force.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of the main parts, FIG. 2 is a front view of the same, FIG. 3 is a side view of the same, and FIG. FIG. 5 is an overall plan view, and FIG. 6 is an overall front view. 2... Drawing truck, 3... Tube support truck, 4... Rotating metal frame, 9... Feeding wire, 10... Drawing wire, 16... Air cylinder (cylinder device), 2
3... Socket, 25... Inclined part, 26... Kick-out claw,
27... Carrying out rail, 29... Swinging frame, 3
2... Arm, 34... Fixed claw, 36... Link member, 37... Opening/closing claw.

Claims (1)

[Scope of Claims] 1. A pull-out cart capable of moving toward and away from one end of the rotating metal frame in the axial direction of the metal frame, an arm inserted into the metal frame, and an arm attached to the tip of the arm and placed inside the metal frame. a fixed claw that comes into contact with the lower inner surface of the cast product, a link member that is swingably attached to the fixed claw at one end, and a link member that is swingably attached to the other end of the link member, and whose outer surface is attached to the metal frame. An opening/closing pawl curved in the longitudinal direction; and a cylinder device connected to the opening/closing pawl to swing the opening/closing pawl around a link member and press it against the upper inner surface of the cast product. A drawing device in centrifugal casting equipment.