JP3812976B2 - Press machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a press apparatus that press-molds a flat panel, for example.
[0002]
[Prior art]
Conventionally, when a flat panel is press-molded by a press device, for example, the flat panel is held in a horizontal position at a temporary standby position immediately above the press surface of the lower mold as a fixed mold, and the upper mold is moved from there. A molding method is known in which a die is lowered and a flat panel is pressed against a press surface of a lower die to perform press molding.
[0003]
At this time, as a means for holding the flat panel horizontally at the temporary standby position, a plurality of supporting members are provided inwardly extending from the vicinity of the peripheral edge on the lower mold side at a position slightly above the press surface of the lower mold. In addition to supporting the peripheral edge of the lower surface of the flat panel with the protruding tip of the support member, the base end of the support member is pivotally supported by a horizontal pivot shaft so that the tip side can swing up and down. For example, a technique is generally used in which a member is biased in a predetermined swinging direction (a direction in which the tip end is swung upward) by a biasing force of a coil spring and maintained in a predetermined support posture by a stopper.
In this technique, when the flat panel placed on the support member receives the pressure of the upper mold from above, the tip of the support member swings downward to guide the flat panel to keep its posture and slide down. When the engagement with the flat panel is released, the original support posture is restored by the coil spring force.
[0004]
[Problems to be solved by the invention]
However, in such a panel holding means, if the number of presses increases, the urging force of the coil spring decreases or the coil spring breaks, and the flat panel cannot be set in an accurate horizontal posture, There is a possibility that the flat panel is tilted and pressed against the lower mold, so that the molding quality may be deteriorated and the operation of the apparatus is stopped.
[0005]
Therefore, there has been a demand for a panel holding means that does not deteriorate the performance or the like even when used for a long time and does not cause a decrease in the reliability of the flat panel molding quality.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a lower mold as a fixed mold, an upper mold as a movable mold, and a panel member as a molding material in the first aspect of the present invention, which is slightly higher than the uppermost portion of the press surface of the lower mold. In a press apparatus provided with a panel holding means for holding in position, as a panel holding means, a predetermined portion on the lower surface of the peripheral edge portion of the panel member is supported and is pivotally supported by a support frame by a horizontal pivot shaft, and the tip side is vertically A plurality of support members swingable to each other, a weight attached to the base end side of the support member and applying a constant torque to the predetermined swing side about the pivot shaft with respect to the support member, A notch groove formed on the front surface, a restricting means provided at the upper end of the notch groove for restricting the position of the support member and maintaining a predetermined support posture, and an upper front side of the support frame are inclined rearward a guide portion formed by providing, the pivot Axis is positioned above the notched groove formed on the front surface of the strut frame, swings distal end side downward the support member takes the pressure from above the panel member on the support member, the panel member is the support member When it comes off, the support member returns to the original support posture by the weight.
[0007]
And if the weight attached to the end of the support member is used to urge the tip of the support member upward, and the restriction means regulates the support posture, the coil spring can be used even if it is used for a long time. The performance is not degraded.
At this time, the support posture of the support member is, for example, a posture in which the tip portion is substantially horizontal so that the panel member can be easily supported, and the regulating means for regulating the support member to the support posture is a stopper on the support member itself. Etc. may be engaged to regulate the swing, or the weight drop position may be regulated.
[0008]
According to a second aspect of the present invention, the weight is pivotally attached to a support member by a horizontal pivoting shaft, and in the third aspect, the weight has a vertically long shape, and one end of the long side The part was made the pivot part of the pivot axis.
[0009]
If the weight is pivotally attached to the support member with the pivot shaft, the range of movement of the weight when the support member swings can be limited, and the space can be effectively used while avoiding interference with the peripheral members. It is done.
At this time, in particular, if the weight has a vertically long shape, the amount of overhang in the lateral direction can be suppressed, and the apparatus can be made compact.
[0010]
Further, the weight may be fixed to the end portion of the support member as in the fourth aspect.
In this case, the configuration is simple and can be configured at low cost.
[0011]
According to a fifth aspect of the present invention, as the panel holding means, a plurality of support members that support a predetermined portion of the lower surface of the peripheral edge of the panel member and are pivotally supported on the support frame by a horizontal pivot shaft and whose front end side can swing up and down. An air cylinder connected to the base end side of the support member and applying a constant torque to the support member at a predetermined swing side around the pivot shaft; and a notch groove formed on the front surface of the support frame; Provided at the upper end of the notch groove is a restricting means for restricting the position of the support member to maintain a predetermined support posture, and a guide portion formed by inclining the upper front side of the column frame rearward. . The pivot shaft is positioned above a notch groove formed in the front surface of the column frame. And the front end side of a supporting member is urged | biased upward by the pressurized air supplied to an air cylinder, and it restrict | limits to a support attitude | position by a control means.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings.
Here, FIG. 1 is an explanatory view showing the pressing process of the pressing device, FIG. 2 is a plan view of the lower mold, FIGS. 3 to 5 are enlarged views showing examples of various configurations of the panel holding means, and FIG. 6 is an enlarged view of the guide member. FIG. 7 is an enlarged view of the pressing member.
[0013]
As shown in FIG. 1, the press device of the present invention comprises a lower die 1 as a fixed die and an upper die 2 that can move up and down with respect to the lower die 1. The lower die 1 includes a punch portion 1a and a punch portion. A blank holder 1b supported by the cushion 1c around 1a is provided, and the upper mold 2 includes a die part 2a and a blank holder 2b supported by the cushion 2c around the die part 2a.
[0014]
On the blank holder 1b of the lower mold 1, panel holding means 3 for temporarily holding the flat panel W at the standby position when press-molding the flat panel W as a molding material is provided. The position is slightly higher than the uppermost part of the punch part 1b.
The flat panel W to be held by the panel holder 3 is pressed downward to bring the upper die 2 drops, so that the press-molded finally off the panel holding means 3.
[0015]
Then, the panel holding means 3, a plurality of struts frame 4, each support member 5 is pivotally supported to ..., ... has a present invention is particularly characterized in this panel holding means 3 .
As shown in FIG. 2, on the blank holder 1b of the lower mold 1, in addition to the panel holding means 3, when setting the flat panel W to the standby position, a plurality of guide members 6a for guiding the peripheral portion , 6b,..., And a pair of presser members 7, 7 that press and hold the peripheral upper surface portion of the flat panel W set at the standby position.
[0016]
For the panel holding means 3 will be described in detail based on FIG.
Here, FIG. 3A is an internal perspective view in a side view, and FIG. 3B is an internal perspective view in a front view.
A notch groove 4 a is provided in a part of the front surface of the support frame 4, and an intermediate portion of the support member 5 is pivotally supported on the support frame 4 by a pivot shaft 10. And the front-end | tip part 5a of the supporting member 5 protrudes ahead from the notch groove 4a, and is comprised as a support part of the flat panel W. As shown in FIG.
The position of the pivot shaft 10 is a position above the support portion, and the upper part on the front side of the support frame 4 is inclined backward as a guide portion 4g.
[0017]
A weight 12 is pivotally attached to the rear end portion of the support member 5 by a pivot shaft 11 so that the tip end 5a side of the support member 5 swings upward. It is fast.
The weight 12 has a vertically long shape, the upper end side in the longitudinal direction is a pivot part, a part on the front side is cut out as a notch part 12a, and the tip part 5a of the support member 5 is downward. The front surface of the weight 12 and the support member 5 do not interfere with each other.
[0018]
Moreover, the upper end of the notch groove 4a of the said support | pillar frame 4 is comprised as the control part k as a control means. That is, a part of the tip portion 5a biased upward is brought into contact with the restricting portion k so that the tip portion 5a assumes a substantially horizontal support posture as shown in FIG. .
The restricting portion k may restrict the position of the lower surface of the weight 12 with a stopper or the like provided below the weight 12.
[0019]
As will be described later, when the flat panel W is placed on the front end portion 5a of the support member 5 and the pressure of the upper mold 2 is applied to the flat panel W, the weight 12 rises and the weight 12 rises. When the front end portion 5a swings downward and the flat panel W is detached from the support member 5, the weight of the support member 5 can be restored to the original support posture.
[0020]
The guide members 6a and 6b shown in FIG. 2 are members for guiding the peripheral edge of the flat panel W when the flat panel W is set at the standby position, and interfere when the molded product is taken out after press molding. It consists of a guide member 6a having an escape mechanism so as not to cause a guide member 6b having no escape mechanism.
For example, as shown in FIG. 6, the guide member 6 a having an escape mechanism is pivotally attached to the blank holder 1 b of the lower mold 1 by the swing pin 13 and the guide member 6 a close to the swing pin 13. The rod tip of the cylinder unit 14 is pivotally attached to the lower end portion of the cylinder unit 14 by a connecting pin 15, and the intermediate portion of the cylinder unit 14 is pivotally supported by the blank holder 1 b by a pin 16.
[0021]
For example, when the flat panel W is set, the guide member 6a is erected in the state shown in FIG. 6, and when the molded product is taken out, the cylinder unit 14 is retracted to fall around the swing pin 13. To prevent interference.
In addition, the guide member 6b which does not have an escape mechanism has the base end part directly fixed to the blank holder 1b, for example.
[0022]
The pressing member 7 shown in FIG. 2 is a member that presses and positions a predetermined upper surface peripheral edge when the flat panel W is set at the standby position. As shown in FIG. The swing pin 16 is pivotally attached to the blank holder 1 b, and the base end side is connected to the rod tip of the cylinder unit 17 by a connecting pin 18. The base end portion of the cylinder unit 17 is pivotally supported by the pin 19 on the blank holder 1b side.
[0023]
When the flat panel W is set at the standby position, the presser member 7 is configured so that the cylinder unit 17 is extended and the peripheral edge of the flat panel W is sandwiched and fixed between the presser member 7 and the blank holder 1b. Yes.
[0024]
The operation and the like of the above press apparatus will be described with reference to FIG.
As shown in FIG. 1A, the flat panel W is set at the standby position by the panel holding means 3 with the upper mold 2 raised. That is, with the support members 5,... In a support posture, the flat panel W is placed on the front end portions 5 a, and is fixed by the press members 7, 7 (FIG. 7).
[0025]
Next, as shown in FIG. 1B, the upper mold 2 starts to descend and presses the flat panel W. At this time, the support members 5,... Swing downward so that the posture of the flat panel W is held horizontally and lowered. At this time, the weight 12 shown in FIG. 3 is raised while maintaining the posture by the pivot shaft 11. When the flat panel W finally comes off the support members 5,..., The support members 5,. At this time, the flat panel W is also detached from the pressing members 7 and 7.
[0026]
And as shown in FIG.1 (C), press molding is completed in the state in which each blank holder 1b, 2b clamped the peripheral part of the flat panel W. As shown in FIG.
When taking out the molded product, the guide members 6a,... Are tilted down and taken out while preventing interference.
[0027]
In the press apparatus as described above, since the support member 5 returns to the support posture by the action of the weight 12, even if the number of times of use increases, the performance deteriorates or is damaged like a coil spring. There is no.
Further, since the weight 12 has a vertically long shape and is pivotally attached to the pivot shaft 11, the amount of protrusion in the lateral direction can be suppressed, and the apparatus can be made compact.
[0028]
Next, another configuration example of the panel holding means 3 will be described with reference to FIG.
Here, FIG. 4A is an internal perspective view in a side view, and FIG. 4B is an internal perspective view in a front view.
[0029]
In this configuration example, as in the above configuration example, a notch groove 4 a is provided in a part of the front surface of the column frame 4, and the intermediate portion of the support member 5 is pivotally supported by the column frame 4 by the pivot shaft 10. ing. And the front-end | tip part 5a of the supporting member 5 protrudes ahead from the notch groove 4a, and is comprised as a support part of the flat panel W. As shown in FIG.
Further, weights 20, 20 are fixed to the rear end portion of the support member 5. The weights 20, 20 extend rearward, and the weights 20, 20 allow the front end portion 5a of the support member 5 to be extended. The side is biased in the direction of swinging upward.
[0030]
And the upper end of the notch groove 4a of the support | pillar frame 4 is comprised as the control part k similarly to the case of the said structural example, and it controls that the front-end | tip part 5a swings upwards, and the attitude | position of the support member 5 Is maintained in a support posture.
Further, even when the weights 20 and 20 are used, the durability is improved, and the weights 20 and 20 are fixed, so that the construction can be simplified.
[0031]
Next, another different configuration example of the panel holding means 3 will be described with reference to FIG. Here, FIG. 5A is an internal perspective view in a side view, and FIG. 5B is an internal perspective view in a front view.
[0032]
Also in this configuration example, a notch groove 4 a is provided in a part of the front surface of the support frame 4, while a rotation shaft 21 that is rotatable with respect to the support frame 4 is provided, and the upper end portion of the support member 5 is provided on the rotation shaft 21. It is stuck. The rotating shaft 21 is fixed to the base end side of the connecting member 22, and the rod tip of the air cylinder 23 is connected to the leading end side of the connecting member 22. And this air cylinder 23 is always urged | biased to the expansion | extension side, Therefore, the front-end | tip part 5a side of the support member 5 is urged | biased in the direction rock | fluctuated upwards. Moreover, the upper end of the notch groove 4a of the support frame 4 is configured as a restricting portion k, and the posture of the support member 5 is maintained in the support posture by restricting the tip portion 5a from swinging upward. .
[0033]
In this case as well, even if the number of times of use increases, it is difficult to cause a problem that the performance deteriorates or breaks, and the durability is improved.
[0034]
In each of the above-described embodiments, the press apparatus is of the type having the upper and lower blank holders 1b and 2b, and the case where the panel holding means 3 is provided in the blank holder 1b has been described as an example. Needless to say, the present invention can also be applied to a type of press machine that does not have the above.
[0035]
【The invention's effect】
As described above, according to the present invention, the support member pivotally supported on the column frame by the pivot shaft by the weight and the regulating means as the panel holding means for holding the panel in the standby position as in the first to fourth aspects. Therefore, even if it is used for a long time, the performance is not deteriorated or damaged, and it is difficult to cause a failure due to its simple structure.
In this case, if the weight is pivotally attached to the support member as in claim 2 and is formed in a vertically long shape as in claim 3, the weight when the support member swings is formed. The moving range can be limited, and the amount of overhang in the lateral direction can be suppressed, and the apparatus can be downsized. Further, if the weight is fixed to the support member as in claim 4, the configuration is further simplified and the configuration can be made at low cost.
Further, as in claim 5, even when the posture of the support member pivotally supported by the support frame by the pivot shaft is regulated by the air cylinder and the regulating means, the performance is not easily lowered even if the number of uses is increased, and the durability is improved. Improvement is achieved.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a pressing process of a pressing apparatus. FIG. 2 is a plan view of a lower die. FIG. 3 is an enlarged view showing a first configuration example of a panel holding means. FIG. 4 is an enlarged view showing a second configuration example of the panel holding means, (A) is a side view, and (B) is a front view. FIG. 5 is a third configuration example of the panel holding means. FIG. 6A is a side view and FIG. 6B is a front view. FIG. 6 is an enlarged view of a guide member. FIG. 7 is an enlarged view of a pressing member.
DESCRIPTION OF SYMBOLS 1 ... Lower mold | type, 1b ... Blank holder, 2 ... Upper mold | type, 2b ... Blank holder, 3 ... Panel holding means, 5 ... Support member, 12 ... Weight, 20 ... Weight, 23 ... Air cylinder, k ... Restriction part, W …flat panel.

Claims (5)

In a press apparatus provided with a lower mold as a fixed mold, an upper mold as a movable mold, and a panel holding means for holding a panel member as a molding material at a standby position slightly higher than the uppermost portion of the press surface of the lower mold The panel holding means supports a predetermined portion on the lower surface of the peripheral edge of the panel member and is pivotally supported by a support frame by a horizontal pivot shaft, and a plurality of support members whose front end side can swing up and down, A weight which is attached to the base end side of the member and applies a constant torque to the support member on a predetermined swing side around the pivot shaft; a notch groove formed on the front surface of the column frame; provided at the upper end of the lack grooves, comprising a regulating means for maintaining a predetermined support position to regulate the position of the support member, the guide portion formed by inclined front side upper portion of the strut frame in the rear, the pivot Notch groove formed on the front surface of the support frame by the support shaft Ri located above, swings the tip side of the lower support member takes the pressure from above the panel member on the support member, the panel member is disengaged from the support member, the support member by the weight of the original support position A press apparatus characterized in that it is adapted to return to the above.   2. The press apparatus according to claim 1, wherein the weight is pivotally attached to the support member by a horizontal pivot shaft.   3. The press device according to claim 2, wherein the weight has a vertically long shape, and one end portion on the long side is a pivot portion of the pivot shaft.   The press apparatus according to claim 1, wherein the weight is fixed to an end portion of the support member. In a press apparatus provided with a lower mold as a fixed mold, an upper mold as a movable mold, and a panel holding means for holding a panel member as a molding material at a standby position slightly higher than the uppermost portion of the press surface of the lower mold The panel holding means supports a predetermined portion on the lower surface of the peripheral edge of the panel member and is pivotally supported by a support frame by a horizontal pivot shaft, and a plurality of support members whose front end side can swing up and down, An air cylinder connected to the base end side of the member and applying a constant torque to the support member on a predetermined swing side around the pivot shaft; a notch groove formed on the front surface of the column frame; provided at the upper end of the notched groove, comprising a regulating means for maintaining a predetermined support position to regulate the position of the support member, the guide portion formed by inclined front side upper portion of the strut frame in the rear, the A pivot formed on the front surface of the support frame by the pivot shaft. Can be positioned above the groove, swings distal end side downward the support member takes the pressure from above the panel member on the support member, the panel member is disengaged from the support member, supported by the weight member is the original A pressing device characterized in that it returns to a supporting posture.

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