JPH0527250Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a workpiece transfer device for transferring a workpiece positioned at a predetermined workstation to a carryout means consisting of a hanger frame type conveyor. be.

(Problems to be solved by the prior art and the invention) A workpiece positioned at a predetermined workstation is transferred onto a conveyor installed adjacent to the workstation using a transfer means. The structured workpiece transfer device is well known in the art. The transfer means used in such transfer devices is often configured to clamp a workpiece using a clamp arm configured to be openable and closable, and to transfer the workpiece from a workstation to a conveyor.

On the other hand, when a casting (in other words, a workpiece) cast in a vertical frameless casting line is transferred to a cooling conveyance line installed adjacent to the casting line, the casting is transferred. The carry-out line is usually composed of a hanger frame having a workpiece receiving pallet and a power & free conveyor for conveying the hanger frame.
When transferring a workpiece clamped by a clamp arm that can be opened and closed to a workpiece receiving pallet supported on a hanger frame in this way,
Since the clamp arm and hanger frame are in a position where they are likely to interfere, there is a risk of workpiece transfer errors due to interference between the two, and there is an urgent need to develop a workpiece transfer device that can avoid interference between the two. ing.

This invention was made in view of the above points,
It is an object of the present invention to prevent interference between a workpiece transfer means and a hanger frame when transferring a workpiece to a workpiece receiving pallet supported on a hanger frame.

(Means for Solving the Problems) In the present invention, as means for solving the above problems, there is provided a work station configured to position a workpiece at a predetermined position, and a work station provided adjacent to the work station. A workpiece transfer device comprising a workpiece receiving pallet placed on a hanger frame of a workpiece transfer conveyor, and a workpiece transfer means that acts to transfer the workpieces positioned on the work station to the workpiece receiving pallet. The workpiece receiving pallet can be pulled out toward the workstation, and a roller that rolls on the hanger frame is provided at the end opposite to the workstation, and the hanger is provided at the end opposite the workstation. An engaging pin is provided that can be freely engaged and detached from the frame, and a rocking mechanism is provided between the work station and the work receiving pallet that can swing back and forth between the two and can be positioned at a predetermined position. The member is pivotably supported, and acts on the swinging member to engage with the engagement pin to release the engagement between the engagement pin and the hanger frame, and causes the swinging member to swing toward the work station. A rotating arm configured to hold the workpiece receiving pallet in a horizontal position during movement, and a drive means for rotating the rotating arm are attached.

(Function) In the present invention, the following effects can be obtained by the above means.

That is, when transferring a workpiece positioned on a work station to a workpiece receiving pallet located on a hanger frame using a transfer means, the engagement between an engaging pin provided on the workpiece receiving pallet and the hanger frame is If the swinging member is released by rotating the swinging arm attached to the swinging member and then swinging the swinging member toward the work station,
The workpiece receiving pallet is pulled out from the hanger frame toward the workstation and horizontally supported. Therefore, if the workpiece is transferred by the workpiece transfer means onto the workpiece receiving pallet that has been pulled out from the hanger frame, the workpiece can be transferred reliably while avoiding interference between the hanger frame and the workpiece transfer means. This means that it is possible.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The workpiece transfer device of this embodiment includes a casting removal workstation S that positions a casting W (in other words, a workpiece) for taking out a casting in a vertical frameless casting line A, and a workstation S adjacent to the workstation S. and a workpiece transfer means 1 which acts to transfer the workpiece W positioned on the work station S to the conveyor C. ing. The symbol M is a mold for vertical frameless casting.

The conveyor C is power & free conveyor 2
, the hanger frame 3 conveyed by the power & free conveyor 2, and the hanger frame 3
The work receiving pallets 4 and 5 are arranged in two stages, upper and lower. In this embodiment, the work W of the work station S is transferred to the work receiving pallet 4 on the upper stage, and the work receiving pallet 5 on the lower stage has already been loaded with different types of work at other stations. work
W′ is said to have been transferred. The hanger frame 3 of this conveyor C is positioned at a position adjacent to the work station S (namely, the work transfer station S') by an appropriate positioning means (not shown), and is also positioned to prevent its swinging. Swinging is restricted by a stopper 6, and after the work is transferred, the stopper 6 is moved by a drive means to move the hanger frame 3 to a position where it can be driven into engagement with the conveyor 2.

On the other hand, the workpiece transfer means 1 includes a movable base 8 that is movable in a direction perpendicular to the conveyance direction of the casting line A on the upper part of the machine frame 7 that is provided across the vertical frameless casting line A. , an elevating table 10 which is provided to be movable up and down with respect to the movable base 8 via an elevating cylinder 9, and clamp arms 11, 11 which are pivotally supported to the elevating table 10 so as to be freely rotatable. It's summery. The clamp arms 11, 11 are adapted to be opened and closed by clamp cylinders 12, 12. In other words, the clamp arms 11, 11 are opened and closed by the contraction and extension of each clamp cylinder 12, and the casting W is clamped when the clamp arms 11, 11 are closed. There is. Specifically, the clamp arms 11, 11 clamp the runner _W1 of the casting W so as to lift it from below.

The movable base 8 is disposed on the machine frame 7 and extends perpendicularly to the conveying direction of the casting line A by the expansion and contraction operation of the drive cylinder 14 along rails 13, 13 that extend in a direction perpendicular to the conveying direction of the casting line A. By moving the movable base 8 in this manner, the casting W clamped by the clamp arms 11, 11
can be transferred to the upper work receiving pallet 4 on the hanger frame 3.

The workpiece receiving pallet 4 is configured to be able to be pulled out in the direction of the workstation S with respect to the upper supporting portion 3a of the hanger frame 3.
A roller 15 that rolls on the hanger frame upper support section 3a is provided at the end opposite to the workstation S, while a roller 15 that rolls on the hanger frame upper support section 3a is provided at the end opposite to the workstation S. An engaging pin 17 is provided to be engaged with a locking portion 16 provided at 3a.
The engagement pin 17 functions to position the workpiece receiving pallet 4 on the hanger frame upper support part 3a by engaging with the locking part 16 of the hanger frame upper support part 3a. In addition,
The locking portion 16 has a groove shape with an open upper part, and can be released from the engaged state by upward movement of the engagement pin 17.

Further, between the work station S and the work transfer station S' (in other words, the hanger frame 3), there is a pallet for pulling out the work receiving pallet 4 of the hanger frame upper support part 3a toward the work station S. Transportation means 18
is provided.

The pallet moving means 18 is an arm-shaped swinging member that is pivotably supported on a base 19 via a rotating shaft 20 so as to be able to swing back and forth between the work station S and the workpiece transfer station S'. A member 21, a cylinder 22 which acts as a driving means for swinging the swinging member 21 and positioning it at an arbitrary swinging position, and a cylinder 22 that is connected to the upper end of the swinging member 21 via a pin 23. A rotating arm that is rotatably supported and operates to engage with the engagement pin 17 and release the engagement state between the engagement pin 17 and the locking portion 16 of the upper support portion 3a of the hanger frame. 24
and a cylinder 25 which acts as a driving means for rotating the rotating arm 24 and positioning it at a desired rotational position. The swinging member 21 is configured such that when it is in an upright state (the state shown in FIG. 1), a swinging arm 24 pivotally supported at its upper end is positioned near the hanger frame 3. A recess 24a is formed at the tip of the rotating arm 24, with which the engaging pin 17 is engaged. Accordingly, the upward rotation of the rotation arm 24 when the rotation member 21 is in the upright state causes the rotation arm 24 to
The engagement pin 17 is engaged with the recess 24a, and the engagement state between the engagement pin 17 and the locking portion 16 is released. The cylinder 22
is supported on the base 19, and its piston rod 22a is connected to the upper end of the swinging member 21, and when the cylinder 22 contracts or extends, the swinging member 21 moves toward the work station S. It is designed to be able to swing to the side (backward tilted state) or to the workpiece transfer station S' side (upright state). Further, the cylinder 25 is supported by the swinging member 21, and the piston rod 2
5a is connected to the rotating arm 24 via a link 26, and the rotating arm 24 can be rotated upward or downward by contraction or expansion of the cylinder 25.

Then, by the upward rotation of the rotation arm 24, the engagement pin 17 of the workpiece receiving pallet 4 is moved into the recess 24.
a, and after releasing the engagement between the engagement pin 17 and the locking part 16 of the hanger frame upper support part 3a, the swinging member 21 is tilted backward (see FIG. 2). When the workpiece receiving pallet 4 is swung, it is pulled out with the roller 15 at one end placed on the hanger frame upper support part 3a, and the engagement pin 17 at the other end is pulled out from the rotating arm 2.
It is adapted to be horizontally supported while being engaged with the recess 24a of No. 4.

Next, the operation of the illustrated workpiece transfer device will be explained.

First, the casting W being conveyed on the casting line A.
is positioned at a workstation S. On the other hand, the hanger frame 3 conveyed by the power & free conveyor 2 is positioned at the workpiece transfer station S' adjacent to the workstation S, and its swing is restricted by the stopper 6. Before transferring the W, the work receiving pallet 4 is pulled out as follows.

That is, the swinging member 21 of the pallet moving means 18 is placed in the upright state shown in FIG.
direction), the engaging pin 17 of the workpiece receiving pallet 4 is engaged with the recess 24a of the rotating arm 24 and lifted upward, and the engaging pin 17 and The engagement with the locking part 16 on the hanger frame upper support part 3a side is released. In this state, when the cylinder 22 is contracted to swing the swing member 21 toward the work station S (in the direction of arrow Q), the swing arm 2
The work receiving pallet 4 is pulled out toward the work station S with the engaging pin 17 being engaged with the recess 24a of the workpiece pallet 4. and,
As shown in FIG.
When the swinging member 21 is swung to a position where the work receiving pallet 4 is in a horizontal position while being placed on the workpiece a, the contraction operation of the cylinder 22 is stopped and the swinging member 21 is positioned in a backward tilted position. do. As a result, the work receiving pallet 4 is held in a horizontal position while being pulled out from the hanger frame 3 toward the work station S.

When the workpiece receiving pallet 4 is completely drawn out as described above, the lifting cylinder 9 and the clamping cylinder 12 in the workpiece transfer means 1 move the casting W positioned on the workstation S.
Clamp arm 1 by actuating 12
1 and 11 (see Figure 1), the movable base 8 is moved toward the workpiece transfer station S' by the contraction operation of the drive cylinder 14, as shown in Figure 2. , and place it on the work receiving pallet 4 in the drawn out state. Therefore,
By retracting the clamp cylinders 12, 12, the clamp arms 11, 11 are operated in the unclamping direction as shown by the chain lines in FIG. 2, and the casting W is transferred onto the work receiving pallet 4. Therefore, the casting W can be transferred while reliably avoiding interference between the clamp arms 11, 11 and the hanger frame 3. When the casting W has been transferred onto the workpiece receiving pallet 4, the workpiece transfer means 1 is retracted to the workstation S side, and the swinging member 21 is returned to the upright state by the extension operation of the cylinder 22. Furthermore, by rotating the rotating arm 24 downward by the extension operation of the cylinder 25, the workpiece receiving pallet 4 is returned to the top of the hanger frame upper supporting portion 3a.

As described above, according to this embodiment, the workpiece receiving pallet 4 is horizontally supported in a state of being pulled out from the hanger frame 3 by the operation of the pallet moving means 18, and the workpieces are transferred onto the workpiece receiving pallet 4 in this drawn out state. The casting W is transferred by the loading means 1, and the casting W can be reliably transferred while avoiding interference between the workpiece transfer means 1 and the hanger frame 3.

It goes without saying that the present invention is not limited to the configuration of the above-described embodiments, and that the design can be modified as appropriate without departing from the gist of the invention.

(Effects of the invention) As described above, according to the invention, a workpiece is placed on a hanger frame of a workstation configured to position a workpiece at a predetermined position and a conveyor for transporting a workpiece provided adjacent to the workstation. A workpiece transfer device comprising a placed workpiece receiving pallet and a workpiece transfer means that operates to transfer the workpieces positioned on the work station to the workpiece receiving pallet. The hanger frame is capable of being pulled out toward the workstation side, and has a roller that rolls on the hanger frame at its end opposite to the workstation, while its workstation side end is capable of being freely engaged with and detached from the hanger frame. An engaging pin is provided between the work station and the work receiving pallet, and a swing member is pivotally supported between the work station and the work receiving pallet, and is capable of swinging back and forth between the two and being positioned at a predetermined position. The movable member engages with the engagement pin to release the engagement state between the engagement pin and the hanger frame, and when the swing member swings toward the work station, the workpiece receiving pallet is held in a horizontal position. Since a rotating arm configured to be able to hold a workpiece and a drive means for rotating the rotating arm are attached, a workpiece positioned on a work station can be transferred to a workpiece receiver located on a hanger frame using a transfer means. Before transferring to a pallet, the engagement between the engagement pin provided on the work receiving pallet and the hanger frame is released by rotating the rotating arm attached to the swinging member, and then the swinging member is rotated. By swinging the member toward the workstation,
It becomes possible to horizontally support the work receiving pallet in a state where it is pulled out from the hanger frame toward the work station, and the work is transferred by the work transfer means onto the work receiving pallet that is pulled out from the hanger frame. In this case, there is a practical effect that the workpiece can be reliably transferred while avoiding interference between the hanger frame and the workpiece transfer means.

[Brief explanation of the drawing]

FIG. 1 is a side view schematically showing a work transfer device according to an embodiment of the present invention, and FIG. 2 is a side view showing the state of the work transfer device shown in FIG. 1 during work transfer. 1...Work transfer means, 3...Hanger frame, 4...Work receiving pallet, 15...Roller,
17... Engaging pin, 21... Swinging member, 24...
Rotating arm, 25...Driving means (cylinder), C
...Conveyor, S...Workstation, W...
...Work (casting).

Claims (1)

[Scope of utility model registration request] a workstation configured to position a workpiece at a predetermined position; a workpiece receiving pallet placed on a hanger frame of a workpiece delivery conveyor provided adjacent to the workstation; and a workpiece receiving pallet positioned on the workstation. The workpiece transfer means acts to transfer a workpiece onto the workpiece receiving pallet, and the workpiece receiving pallet is capable of being pulled out toward the workstation side, and the end portion opposite to the workstation has the said workpiece transfer means. A roller is provided that rolls on the hanger frame, and an engaging pin is provided at the end of the roller on the work station side that can be freely engaged with and detached from the hanger frame, so that the work station and the work receiving pallet can be connected to each other. A swinging member that swings back and forth between the two and can be positioned at a predetermined position is pivotally supported between the two, and the swinging member engages with the engagement pin to engage the engagement pin. A rotating arm configured to act to release the engagement between the pin and the hanger frame and to hold the workpiece receiving pallet in a horizontal position when the swinging member swings toward the work station; A workpiece transfer device characterized by being equipped with a drive means for rotating an arm.