JP4203333B2 - Sand removal device for work - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention removes sand adhering to a work, particularly sand adhering to a work feeder, by hitting a casting (work) formed by casting, such as an automobile part, with a hammer. In detail, the work reversing type sand removal device that reverses the work, directs the hot metal part downward, and hits with a hammer to drop the cast sand around the hot water by its own weight. About.
[0002]
[Prior art]
Many machine parts such as automobile parts are molded by casting. A large amount of sand adheres to the cast workpiece. Therefore, it is necessary to hit the workpiece with a hammer to remove the sand attached to the workpiece.
[0003]
However, when the workpiece is hit with a hammer, not only a loud noise is generated, but also the removed sand is scattered. Therefore, in order to block this loud noise and prevent the sand from scattering, the hammer must be struck in a sealed device.
[0004]
As a sealing device for hitting a workpiece with a hitting hammer, a device shown in FIG. 7 is conventionally known. In FIG. 7, first, the work 1 is clamped on the work holding jig 2 with the clamp 3, inverted by 180 ° by the reversing drive unit 4, and the work holding jig 2 is introduced into the striking box 5, and then the cylinder 6 With the operation of, the opening 7 is closed by the shutter 8 and the striking box 5 is sealed. At this time, the work 1 in the striking box 5 has a hot water supply portion directed downward, and a hammer striking device 12 is provided below the work 1.
[0005]
Next, after closing the damper 11, the cylinder 9 in the striking box 5 is actuated to move the hammer 10 upward, press against the work 1 and strike, and the sand adhering to the work 1 is dropped.
[0006]
[Problems to be Solved by the Invention]
However, in the above-described known apparatus, the reversal drive unit 4 that reversely drives the work holding jig 2 into the striking box 5 and the cylinder 6 that is the drive unit of the shutter 8 are each independently required. In order to draw the entire jig 2 into the striking box 5, a large opening 7 is required, which increases the size of the apparatus.
[0007]
Accordingly, an object of the present invention is to use a link mechanism for reversal drive in order to reduce the number of drive units, simplify the apparatus, and reduce the area of the opening, thereby reversing the workpiece with a single drive source. Another object of the present invention is to provide a sand removal device for a work that achieves sealing of a hitting box and improves the above-mentioned drawbacks of the known art.
[0008]
[Means for Solving the Problems]
In order to achieve the above-described object, according to the present invention, an impact box having an opening at the top and having a hammer impact device inside, and a work to be sand-sanded by closing the opening in a sealed state are sealed. A workpiece holding jig for holding the workpiece in a hitting box, wherein the workpiece is hit by a hammer in a sealed hitting box to remove sand adhering to the workpiece. The holding jig is reversed and moved by a reversing drive mechanism composed of a drive link and a guide link, closes the opening in a hermetically sealed state, and holds the work in a sealed striking box. The link has a dog-shaped link piece whose tip is pivotally fixed to the work holding jig and whose end is pivotally fixed to the striking box, and one end of the link is the dogleg-shaped link. The guide link has a dogleg shape, and the tip is pivotable to the work holding jig. The end is fixed to the striking box so as to be freely rotatable, the work force is transmitted from the drive connecting member to the link piece through the drive transmission piece, and the guide link guide action is applied to the work piece. The holding jig is reversely moved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
[0010]
FIG. 1 is a cross-sectional view of a specific example of the apparatus of the present invention, FIG. 2 is a cross-sectional view of a state before the reverse movement of the work holding jig in FIG. 1 is started, and FIG. 4 is a cross-sectional view of the tool in the middle of the reversing movement, FIG. 4 is a cross-sectional view of the state in which the reversing movement of the work holding jig in FIG. 1 is completed, and FIG. FIG. 6 is a perspective view of another specific example of the device of the present invention.
[0011]
In FIG. 1, the device of the present invention basically includes a striking box 21 and a work holding jig 22. The striking box 21 has an opening 23 at the top and is provided with a hammer striking device 24 inside. The hammer 26 is moved up and down by the operation of the cylinder 25. The work holding jig 22 is configured by extending a packing 27 around the periphery. The work holding jig 22 is fitted into the opening 23 via the packing 27 by reversing movement, and the opening 23 is closed by the work holding jig 22. Keep the blow box 21 sealed.
[0012]
That is, the workpiece holding jig 22 holds the workpiece 28 on the upper side by a clamp 29, and reversely moves by a reversing drive mechanism 31 described later to close the opening 23 of the striking box 21, and keeps the striking box 21 in a sealed state. At this time, the work 28 is held downward in the sealed hitting box 21 and is hit by the hammer 26 with the damper 30 closed, and the sand adhering to the work is dropped.
[0013]
The feature of the present invention is that the work holding jig 22 is reversed and moved by the reverse drive mechanism 31, and the opening 23 of the hitting box 21 is fitted and closed, and the work 28 held by the work holding jig 22 is sealed. The inside of the box 21 is to hold it downward.
[0014]
The reverse drive mechanism 31 includes a drive link 32 and a guide link 33. The drive link 32 is composed of a dog-shaped link piece 37 and a drive transmission piece 39. The link piece 37 has a distal end 34 fixed to the work holding jig 22 so as to be rotatable, and a distal end 35 is an outer wall of the striking box 21. It is rotatably fixed to 36. One end of the drive transmitting piece 39 is connected to the end 35 of the dog-leg-shaped link piece 37, and the other end is connected to a driving connecting member 38 such as a tie bar so as to be rotatable. The drive transmission piece 39 may be formed integrally with the link piece 37 or may be a separate body. Like the link piece 37, the guide link 33 is formed in a dogleg shape, the tip 40 is rotatably fixed to the work holding jig 22, and the end 41 is rotatably fixed to the striking box 21. Become.
[0015]
The device of the present invention having the above-described configuration transmits the driving force from the driving connecting member 38 to the link piece 37 through the driving transmission piece 39, and the work holding jig 22 is received while receiving the guide action of the guide link 33 by this driving force. The opening 23 is closed in a sealed state by the work holding jig 22. At this time, the work 28 is held in the sealed hitting box 21, and the work 28 is hit by the hammer 26, and the sand adhering to the work is dropped.
[0016]
2 to 4 are cross-sectional views showing the reverse movement state of the workpiece holding jig 22, and FIG. 2 shows the state of the workpiece holding jig 22 before receiving the driving force from the driving connecting member 38. FIG. In this state, the work 28 to be sand-dropped is clamped upward on the work holding jig 22 by the clamp 29.
[0017]
FIG. 3 is a sectional view showing a state in which the reverse movement of the workpiece holding jig 22 is started by the driving force from the driving connecting member 38, and FIG. 22 shows a cross-sectional view in which the opening 23 is completely closed and the striking box 21 is sealed. The movement trajectories of the workpiece holding jig 22 and the reverse drive mechanism 31 shown in FIGS. 2 to 4 are shown in FIG. 44 is a locus.
[0018]
FIG. 6 is a perspective view of another specific example according to the present invention, in which a rotating shaft 42 is installed on the outer wall 36 of the striking box 21. The link piece 37 of the drive link 32 has its tip 34 fixed to the work holding jig 22 so as to be rotatable, the end 35 is fixed to the rotary shaft 42, and one end of the drive transmission piece 39 is connected to the rotary shaft 42. The other end is rotatably connected to the drive source 38. Then, the drive connecting member 38 is driven by the speed reduction motor 43 to rotate the rotating shaft 42 to drive the drive link 32 to reversely move the work holding jig 22 and close the opening 23. 33 is a guide link similar to that described above.
[0019]
【The invention's effect】
The above-described apparatus of the present invention only needs to provide one reversal drive mechanism 31 as a drive part, that is, the reversal of the work 28 and the sealing of the striking box 21 are achieved by one drive connecting member 38. In addition, the work holding jig 22 is not entirely introduced into the hitting box 21 as in the prior art, but is tightly fitted into the opening 23 via the surrounding packing 27 and the like, so the opening 23 has a small area. And the size of the device is reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a specific example of the device of the present invention.
FIG. 2 is a cross-sectional view of a state before starting the reverse movement of the workpiece holding jig in FIG.
FIG. 3 is a cross-sectional view of the workpiece holding jig in the state of reversing movement in FIG. 1;
4 is a cross-sectional view showing a state in which the reverse movement of the work holding jig in FIG. 1 is completed.
FIG. 5 is a cross-sectional view showing a movement trajectory of a workpiece holding jig and a reverse drive mechanism.
FIG. 6 is a perspective view of another specific example of the device of the present invention.
FIG. 7 is a specific example of a known sand removal apparatus.
[Explanation of symbols]
21 strike box 22 work holding jig 23 opening 24 hammer hitting device 25 cylinder 26 hammer 27 packing 28 work 29 clamp 30 damper 31 reverse drive mechanism 32 drive link 33 guide link 34 tip 35 end 36 outer wall 37 link piece 38 drive connection Material 39 Drive transmission piece 40 Tip 41 End 42 Rotating shaft 44 Trajectory

Claims (4)

A striking box having an opening at the top and having a hammer striking device inside, and a work holding jig for holding the work to be sanded by closing the opening in a hermetically sealed state in a sealed striking box The workpiece holding jig comprises a drive link and a guide link, wherein the workpiece holding jig removes sand adhering to the workpiece by being hit by a hammer in a sealed hitting box. The reversing drive mechanism reverses the opening, seals the opening in a sealed state, and holds the work in a sealed hitting box, and the drive link is pivotally fixed to the work holding jig. A link-shaped link piece whose end is rotatably fixed to the striking box, one end is connected to the end of the dog-shaped link piece, and the other end is connected to the drive connecting member. The guide link has a dogleg shape, the tip is pivotally fixed to the work holding jig, and the end is pivotally fixed to the striking box. The workpiece sand is characterized in that the driving force from the drive connecting member is transmitted to the link piece through the drive transmission piece, and the workpiece holding jig is reversed by the guide action of the guide link. Dropping device. In claim 1, a rotary shaft is installed on the outer wall of the striking box, the drive link is pivotally fixed to a work holding jig, and a distal end is fixed to the rotary shaft. One end is connected to a rotating shaft, and the other end is rotatably connected to a driving connecting member. The driving connecting member is driven to rotate the rotating shaft to drive the driving link. The workpiece sand removal apparatus according to claim 1, wherein the workpiece holding jig is reversed and moved. The workpiece holding jig according to claim 1, wherein the workpiece holding jig is fitted into the opening so as to be positioned inside the striking box by reversing movement, and the opening is sealed in a sealed state. Sand removal device. 4. The workpiece sand removal apparatus according to claim 3, wherein a packing is stretched around the workpiece holding jig, and the opening is sealed in a sealed state via the packing.

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