JPS598828Y2 - Interlocking mechanism in press type mounting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an interlocking mechanism in a press mold mounting device, and more particularly to a series of interlocking mechanisms for clamping and positioning a die in a press mold mounting device. To provide an interlocking mechanism in a press die mounting device which allows press die replacement work to be carried out extremely easily and quickly, has reliable operation, is excellent in durability and vibration resistance, and has exceptionally good positioning accuracy.

Conventionally, various press mold mounting devices of this type have been devised for the purpose of reducing setup time through rapid mold replacement.
Broadly speaking, there are two types of mechanisms: a mechanism that separately operates a clamp that tightens and fixes the mold on the base plate and a location pin that positions the mold, and a mechanism that simultaneously operates the clamp and pin.

The former mechanism has been most commonly adopted in the past, as in Utility Model Application Publication No. 491-73075, and its technical idea is to provide a clamp to prevent the vertical movement of the mold attached to the base plate. The mold is oscillated by a piston rod or the like to tighten and fix the mold, and the purpose is to reliably and strongly prevent vertical movement of the mold.

However, recently, based on the technical idea that the function of the clamp is not to tighten and fix the mold, but to eliminate the gap, it is sufficient to eliminate the gap. A mechanism for preventing mold gaps has been developed using the shaft 27, and by employing the eccentric shaft 27, the location pin 12 is rotated by the rotation of the eccentric shaft 27 through the meshing of the rack 28 and the pinion 29.
There is known a device in which a spacer plate 10 has a positioning hole 11 that can be retracted and retracted from the positioning hole 11 of the paste plate 10.

In other words, the latter interlocking mechanism between the eccentric shaft 27 and the location pin 12 is very effective in terms of mold replacement workability and reduces setup time, compared to the former individual operation. This can be done with just one action of turning the wheel, and it has a very good effect.

However, if an eccentric shaft is used for the purpose of simply preventing the gap from vertical movement of the mold as in the latter case, the vertical positioning of the mold will become unstable due to impacts during work after the mold is installed. In addition to the serious problem of lack of reliability of the product, since the eccentric shaft 27 and the location pin 12 are interlocked by the rack 28 and the pinion 29, the rack 28 may be damaged due to severe vibrations or shocks during work. This was a serious problem.

In addition, since the eccentric shaft and location pin both have small diameters, it was extremely difficult to attach a rack and pinion to them in terms of production.

In any case, the press mold mounting device shown in FIG. 7 works by interlocking the eccentric shaft 27 and the location pin 12 via a rack and pinion, and prevents mold gaps (vertical positioning) by rotating only the eccentric shaft. Preventing planar movement (
Although it has a special effect in terms of operability, in which horizontal positioning can be performed at the same time, it has various fatal drawbacks in other respects such as reliability, durability, and manufacturing aspects.

The present invention focuses on these points and makes fundamental improvements to the structure of the interlocking mechanism, which is the greatest advantage of the above-mentioned invention.The main features of this invention are:
Alternatively, in an interlocking mechanism in a press mold mounting device for clamping and positioning a base plate to which an upper mold is attached, a support plate provided on a lower mold or upper mold holder to which the base plate is attached is rotatable together with the clamp by a cam shaft. an eccentric cam pivotally mounted on the cam, a bar that moves up and down as a result of the rotation of the cam, and a lower end of the bar. A connecting rod provided perpendicularly to the connecting rod, a pair of swinging rods whose force points are connected to both sides of the connecting rod and swinging about a pivot pin as a fulcrum by the vertical movement, and the swinging of the swinging rod. and a location pin connected preferably to the action point side of the swinging rod so as to be freely retractable from the space of the holder into the positioning hole of the base plate.

The specific structure will be explained below according to an embodiment shown in the drawings.

3 is a camshaft 5 mounted on a support plate 4 erected on the lower die holder 1.
an eccentric cam rotatably pivoted together with a clamp 6 at 7; a bar 7 abutting the lower surface of the cam 3;
Reference numeral 8 denotes a swinging rod pivotally attached by a pivot pin 9, and is provided in a box-shaped space 2 formed in a notch shape inside the lower mold holder 1.

Reference numeral 12 denotes a long hole 1 formed on the action point side 8a of the swinging rod 8.
This is a location pin provided with a protruding pin 14 that is loosely fitted into the pin 3.

Moreover, the swinging rod 8 and the location pin 12 are located in two of the four positioning holes 11, . ．． A pair of swinging rods 8, 8 on both sides are provided corresponding to 11, and the swinging rods 8, 8 on both sides are connected to the bar 7 at the force point side 8b by a connecting rod 15 so as to be rotatable.

The interlocking mechanisms of the clamp mechanism, the swing rod, and the location pin having the above structure are also symmetrically provided on the other side of the lower mold holder 1.

The interlocking mechanism consisting of the above structure is also symmetrically provided on one side and the other side of the upper die holder 16 for attaching the upper die.

That is, a space 2' is formed inside the upper mold holder 16, and a clamp 6' and an eccentric cam 3 are attached to a support plate 4' vertically provided on the upper mold holder 16 by means of a cam shaft 5'.
A bar 7' is attached to the cam 3' for swinging a swinging rod 8' which is rotatably pivoted in the space 2' by a pivot pin 9'. It comes into contact with me.

Further, a base plate 10' having four positioning holes 11 bored therein is attached to the mounting surface of the upper mold holder 16, and a base plate 10' is formed on the action point side 8'a of the swinging rod 8'. A projecting pin 14' provided on the location pin 12' is loosely fitted into the elongated hole 13'.

Moreover, the swinging rod 8' and the location pin 12' are provided on one side surface at two locations corresponding to the positioning holes 11, and the swinging rods 8' and 8' on both sides are connected by a connecting rod 15'. Become.

As described above, in this embodiment, four positioning holes are drilled in the base plate, a retractable location pin is placed in each hole, and clamps that interlock with the location pins are provided on both sides of the base plate to connect the clamps and the location pins. This structure is interlocked with a bar and a swinging rod, and this structure is symmetrically provided on a lower die holder for attaching the lower die and an upper die holder for attaching the upper die.

Note that supporting tools are provided on both sides of the lower mold holder 1 and on both sides of the upper mold holder 16, and the tools 19 are
As shown in the figure, the spline bolt 18 is screwed onto the holders 1 and 16 so that the head 18' of the spline bolt 18 is positioned directly below one piece 6a of the clamp 6, and the ratchet body 19
A ratchet lever 23 is provided so as to be able to hold one of a pair of left and right ratchet pawls 22 by vertical movement of a direction switching knob 21 on a spline shaft portion 20 mounted therein. It is in.

Since the present invention has the above structure, first, the base plate 10' of the upper mold A is attached to the lower mold holder 1 and the upper mold holder 16.
and the base plate of the lower mold B} 10 are respectively attached, and when the cam shaft 5 connecting the clamp 6 and the eccentric cam 3 is slightly rotated counterclockwise, the bar 7 in contact with the cam 3 is rotated slightly. descends according to the eccentric rotation of the cam 3 and presses the connecting rod 15.

When the connecting rod 15 further presses the force side 8b of the swinging rod 8,
The swinging rod 8 swings clockwise about the pivot pin 9, and the action point side 8a rises.

Therefore, the location pin 1 attached to the point of action side 8a
2 rises and is smoothly inserted into the positioning hole 11 of the base plate 10.

Therefore, one side of the base plate 10 is positioned in the horizontal direction by fitting the location pins 12, 12 thereinto.

At this time, the clamp 6 rotates with the rotation of the camshaft 5, and the other piece 6b of the clamp 6 comes into pressure contact with the base plate 10, so that one side of the base plate 10 also rotates in the vertical direction. Positioned.

Next, by rotating the camshaft 5 on the other side of the base plate 10 in the same manner as described above, the location pins 12 are inserted into the positioning holes 11 of the base plate 10.
11 respectively to position the base plate 10 in the horizontal direction, and at the same time, the other piece 6b of the clamp 6
is brought into pressure contact with the base plate 10, and the base plate 1
0 in the vertical direction.

Thereafter, the support tool 17 is operated to fix this state.

First, when the direction switching knob 21 is moved downward, the leaf spring 24
By moving the ratchet pawl 22 on the right side as shown in Fig.
engages with the groove of the spline shaft portion 20 of the spline bolt 18, and at this time, the left ratchet pawl 22 is free from the spline shaft portion 20 as shown in the figure.

In this state, when the ratchet lever 23 is repeatedly rotated to the right several times, the spline bolt 18 gradually rotates and rises from the lower mold holder 1 into which it is screwed.

As the spline bolt 18 rises, the head 18' of the bolt 18 comes into contact with one piece 6a of the clamp 6 and presses and supports this, thereby fixing the clamp 6 and further fixing the location pin 12.

This press support of the support tool 17 is achieved by the ratchet pawl 22 on the right side engaging with the spline shaft portion 20 as shown in FIG. can.

In the above method, the base plate 10 for mounting the upper mold is also used in the horizontal direction with the location pin 12 and in the vertical direction with the clamp 6.
' to position and fix the respective positions.

To release the tightening of the base plate 1-10, move the direction switching knob 21 of the support tool 17 upward, engage the left ratchet pawl 22 with the spline shaft 20 by moving the leaf spring 24, and then The ratchet pawl 22' is made free from the spline shaft portion 20.

In this state, when the ratchet lever 25 is repeatedly rotated to the left several times, the spline bolt 18 rotates and is screwed downward into the threaded portion 26 of the lower die holder 1, and its head 18 is screwed into the part 6a of the clamp 6. Gradually loosen the pressure.

Further, rotate the ratchet lever 23 to lower the head 18' of the spline bolt 18 to a position slightly below one piece 6a of the clamp 6, then rotate the camshaft 5 clockwise to lower the head 18' of the spline bolt 18 to a position slightly below one piece 6a of the clamp 6. The piece 6b is removed from the base plate 10, and the eccentric cam 3 is eccentrically rotated.

When the bar 7 rises as a result of the eccentric rotation of the cam 3, and the power point side 8b of the swinging rod 8 also rises via the connecting rod 15, the swinging rod swings counterclockwise about the pivot pin 9 as a fulcrum. The action point side 8a of the moving rod 8 is lowered, and the location pin 12 is also lowered and comes out of the positioning hole 11 of the base plate 10.

Therefore, the mold can be easily replaced after that.

As described above, the present invention is constructed by interlocking the clamp for tightening in the vertical direction and the location pin for positioning in the horizontal direction, so the positioning and tightening of the upper and lower base plates can be performed in 4 steps. This has the effect of significantly omitting work steps compared to the conventional eight steps in which positioning and tightening are performed separately.

In this embodiment, a pivot pin 9 serving as a fulcrum for the swing of the swing rod 8 is provided between the point of force and the point of action, that is, between the connection point with the bar 7 and the connection point with the location pin 12. However,
The present invention is by no means limited to this, and for example, the fulcrum and the force point, that is, the position of the pivot pin 9 and the position of the connection point with the bar 7 may be changed as shown in FIG.

In the case of FIG. 6, the bar 7 and the location pin 12 move up and down in the same direction.

Furthermore, the structure and attachment means of the cam 3 and the bar 7 are by no means limited to the embodiments described above.

Further, a support tool 1 that presses and supports one piece 6a of the clamp 6
7 is by no means limited to this example.

Other means for connecting the swinging rod 8 and the location pin 12 are by no means limited to the elongated hole 13 and the protruding pin 14 of this embodiment, and the positioning hole 11 of the base plate 10
The number is also not limited in any way.

As mentioned above, the present invention has a structure in which the bar is raised and lowered by rotating the clamp, the swinging rod is rocked by the lifting and lowering of the bar, and the location pin is raised and lowered by swinging the swinging rod, so the operability is firstly improved. By interlocking the clamp and location pin, the two operations of the clamp and location pin can be performed in one operation, and the base plate can be positioned in four operations including the upper and lower dies, which greatly improves operability and work efficiency. improved.

Furthermore, since the interlocking mechanism uses a bar and a swinging rod instead of the conventional location pin and clamp that are connected through the engagement of a rack and pinion, it is easier to manufacture and is less susceptible to sudden vibrations and shocks. Therefore, it has exceptional effects such as excellent durability and vibration resistance.

In addition, the present invention uses an interlocking mechanism and aims at positioning in the vertical direction by tightening and fixing by pressing the base plate, so compared to the point or line contact using an eccentric shaft as in the conventional interlocking mechanism, it becomes a surface contact and this makes it more stable. This greatly increases the reliability of the product.

Furthermore, each operation in the interlocking mechanism is reliable and no excessive force is applied to the location pins, so the horizontal positioning accuracy is always stable and there is no risk of wobbling or the like.

Furthermore, the base plate has a simple shape and is easy to manufacture and handle.

Another advantage is that the mold can be replaced smoothly and easily.

Furthermore, the bar is provided with a pair of swinging rods via a connecting rod, and each of the swinging rods is provided with a location pin, so that by tightening the clamp, two positioning holes on the base plate are simultaneously inserted. There is an advantage that a location pin is inserted, and therefore positioning work can be performed efficiently.

In addition, it has excellent practical value such as the overall shape is simple and can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the press die mounting device with the upper die holder removed. FIG. 2 is a front view of the press mold mounting device. FIG. 3 is an enlarged sectional view of an interlocking mechanism as an example. FIG. 4 is a schematic plan view showing the interlocking mechanism. Figure 5 shows the support tool, with A being a longitudinal cross-sectional view and the opening being a cross-sectional view. FIG. 6 is a sectional view of main parts showing another embodiment of the interlocking mechanism. FIG. 7 is a longitudinal sectional view showing a conventional example. 1... Lower die holder, 3... Eccentric cam, 4... Support plate, 5
...Camshaft, 6...Clamp, 7...Bar 8...
- Swinging rod, 9... Pivot pin, 10... Base plate, 11... Positioning hole, 12... Location pin.

Claims (1)

[Scope of utility model registration request] In an interlocking mechanism in a press die mounting device for clamping and positioning a base plate 10 for attaching a lower die or a base plate 10' for attaching an upper die, a lower die or upper die holder 1, 16 for attaching said base plate 10, 10', respectively. a clamp 6 rotatably mounted on a support plate provided on the camshaft 5 through a camshaft 5; and an eccentric cam 3' coaxially and rotatably mounted on the camshaft 5 together with the clamp 6. , a bar 7 that moves up and down according to the rotation of the cam 3, a connecting rod 15 provided perpendicularly to the lower end of the bar 7, and a force point side 8b connected to both sides of the connecting rod 15. Due to the vertical movement of the bunny 7, the pivot pin 9
A pair of swinging rods 8, 8 that swing around the fulcrum, and the swinging rods 8,
The swinging rods 8, 8 can freely move in and out from the space 2 of the holder into the positioning hole 11 of the base plate by swinging the swinging rods 8, 8.
A pair of location pins 12, 1 having a protruding pin 14 loosely fitted into a long hole 13 drilled on the action point side 8a of the
2. An interlocking mechanism in a press-type mounting device, characterized by comprising: