JPH04367399A - Automatic mold transfer in and out device of press machine - Google Patents

Abstract

PURPOSE:To automatically transfer molds for press in and out of a press device by providing a pair of right and left roller conveyors and slide arms for transferring in and out of the molds on the front face of the press device and constituting the conveyors in such a manner that the conveyors can be lifted. CONSTITUTION:A pair of the right and left roller conveyors 40 having the die transporting plane higher than upper and lower mold mounting base 12 of a bolster are provided before and behind the front surface part of the bolster 10 of the press device. A pair of the right and left slide arm mechanisms 20 which have the slide arms 24 carried on plural guide rollers 22a to 22g and extending transversely on the bolster and slide transversely up to the position where the front ends 24a of these arms retract form the forward projecting position of the bolster into the press device in parallel with the conveyors 40 are provided. The recessed parts 25a of the bases of the molds W and the projecting parts 25b of a die mounting base 12 are engaged and the slide arms 24 are varied in height from the plane of the die mounting plate by the lifting mechanisms 44 of the conveyors 40, by which the molds W are automatically and extremely easily transferred from the conveyors 40 in the press device and are transferred out thereof.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This relates to a mold loading/unloading device in a press machine that transports a mold on the bolster of the press machine to the front of the press, or transports a mold on the front face of the press onto the bolster. This invention relates to an automatic mold loading/unloading device that automates the loading/unloading of molds.

0002

2. Description of the Related Art FIG. 8 shows a plan view of a bolster of a conventional press machine, in which reference numeral 1 indicates a press frame, reference numeral 2 indicates a bolster, and above the bolster 2 there are a pair of left and right pairs for fixing and holding a lower mold. Lower mold mounts 3, 3 are provided, and a pair of left and right roller conveyors 4, 4 extending back and forth are provided inside the mold mounts 3, 3. The roller conveyors 4, 4 can be placed in a position where the mold conveyance surface is higher than the lower mold mounting base 3 or in a lower position by an elevating mechanism (not shown). When carrying out molds from the lower mold mount 3 or loading molds into the mold mount 3, the roller conveyors 4, 4 are positioned higher than the lower mold mount 3, and the work is carried out. A worker was pushing the mold directly by hand and sliding it on the roller conveyor. Note that reference numeral 5 is a clamp for fixing the mold W to the mold mount 3. Reference numeral 7 denotes a conveyor disposed in front of the bolster 2, and the mold W carried out to the front of the bolster 2 is carried out of the press line by the conveyance roller 7.

0003

However, in the above-mentioned prior art, the operator must directly push the mold by hand to slide it, which is very troublesome work. Moreover, the heavy molds required labor and were also dangerous work. The present invention has been made in view of the problems of the prior art, and its purpose is to provide an automatic mold loading/unloading device that can automatically load/unload molds without bothering the operator.

0004

[Means for Solving the Problems] In order to achieve the above-mentioned object, in the mold automatic loading/unloading device for a press machine according to the present invention, the mold automatic loading/unloading device for a press machine is arranged in front and behind the front side of the bolster of the press machine, and It has a pair of left and right roller conveyors for loading and unloading that have a mold conveyance surface higher than the mold mounting base, and a slide arm that is carried by a plurality of guide rollers and extends back and forth on a bolster, and the front end of the slide arm is connected to the loading/unloading roller conveyor. There is a pair of left and right slide arm mechanisms that slide back and forth parallel to the unloading roller conveyor from a position protruding in front of the bolster to a position retracting into the press. An engagement protrusion that engages with an engagement recess formed on the bottom surface and is connected to the mold in the front-rear direction; and the slide arm mechanism is moved up and down, and the slide arm is connected to the mold conveyance surface of the roller conveyor. The device is equipped with an elevating mechanism that can alternatively take an elevated position where the slide arm is flush with the lower mold mount and a lowered position where the slide arm is lower than the lower mold mount.

According to a second aspect of the present invention, in the mold automatic loading/unloading device according to the first aspect, the loading/unloading roller conveyor intersects with the conveying roller conveyor extending in the left-right direction in front of the bolster, and the loading/unloading roller conveyor The unloading roller conveyor is capable of being raised and lowered by an elevating mechanism, so that it can be lowered to a position lower than the mold conveying surface of the conveying roller conveyor.

[0006]

[Operation] When carrying out the mold, the slide arm mechanism is raised by the elevating mechanism, the slide arm side engaging convex part is engaged with the mold side engaging concave part, and the mold is supported by the slide arm. . Then, by sliding the slide arm in front of the bolster, the mold is slid onto the loading/unloading roller conveyor. On the other hand, when transporting the mold, the slide arm mechanism is raised by the elevating mechanism with the slide arm protruding in front of the bolster, and the slide arm side engagement convex part is engaged with the mold side engagement concave part. . Then, by sliding the slide arm in the direction of retracting into the press, the mold is slid on the loading/unloading roller conveyor and loaded onto the bolster. Then, the slide arm mechanism is lowered and the mold is placed on the lower mold mount.

[0007] In claim 2, the molds carried out onto the conveyor for carrying in and out are placed on the roller conveyor for conveyance by lowering the roller conveyor for conveying in and out, and can be conveyed by the roller conveyor for conveyance. In addition, the mold that has been transported to the front of the bolster by the transport roller conveyor is located above the transport roller conveyor that is in the lowered position, and by raising the transport roller conveyor, the mold can be moved to the front surface of the bolster. Placed on the conveyor, the mold is ready to be delivered to the bolster.

[0008]

Embodiments Next, embodiments of the present invention will be described based on the drawings. Figures 1 to 5 show an embodiment of the present invention. Figure 1 is a plan view of the area around the press bolster, and Figure 2 is a side view of the area around the bolster (side view with the front mold mount removed). )
, FIGS. 3 and 4 are longitudinal sectional views of the slide arm mechanism, and FIG. 5
FIG. 2 is an explanatory diagram illustrating the movements of a slide arm mechanism, a lifting mechanism, and a roller conveyor.

In these figures, reference numeral 10 is a bolster supported by a pedestal frame 8 fixed on the floor.
A pair of lower mold mounts (hereinafter simply referred to as mold mounts) 12, 12 are fixed on the bolster 10 at a distance from each other in the left and right directions. The mold mount 12 is provided with a clamp member 14, and both ends of the lower mold are fixed to the mold mount 12 by the clamp members 14. A space area 13 corresponding to the height of the mold mounts is formed between the mold mounts 12, 12, and this space area 13 is used as a scrap space for collecting and discharging scraps generated during press working. It's being used. Slide arm mechanisms 20 and 20 are provided on opposite side surfaces of the mold mounts 12 and 12, respectively.
is installed. Note that the reference numeral 11 is a press frame.

The slide arm mechanism 20 has a plurality of guide rollers 22a to 22g arranged horizontally in series in a slide arm case (hereinafter simply referred to as an arm case) 21 that extends back and forth, and has a rectangular cross section on the guide rollers 22a to 22g. A long slide arm 24 is supported by the case 21 and is slidable in the front and rear directions with its side surface guided by the case 21. A belt 23 is wound around the guide rollers 22a to 22g, and a slide arm 24 is connected to the belt 23. Reference numeral 24a indicates a connecting portion between the slide arm 24 and the belt 23, and the slide arm 24 is connected to the belt 23.
It slides forward and backward together with 3. Furthermore, when the mold is carried in and out, which will be described later, the slide arm 24 carries the mold, but the weight of the mold that acts on the slide arm 24 is absorbed by the guide roller 22 that carries the slide arm 24.
Backed up by a to 22g. A convex portion 25b that can be engaged with a concave portion 25a formed on the lower surface of both left and right ends of the mold is formed protruding from the upper surface of the approximately central portion of the slide arm 24 in the longitudinal direction. In the drive unit frame 31 on the back side of the bolster 10, there are provided a guide roller 22h around which a belt 23 extending from the guide roller 22g is wound, and a tension roller 22i. The rotation of a drive roller 26 (see FIG. 5) of a horizontally placed drive motor M (see FIG. 1) is transmitted to the roller 22h via a belt 27. The guide rollers 22h, 22h of the pair of left and right slide arm mechanisms 20, 20 are connected to each other by a shaft 28, and the pair of left and right belts 23, 23 run together to slide the left and right slide arms 24, 24 together. let The slide arm 24 can slide forward and backward from the position indicated by reference numeral A in FIG. 2 to the position indicated by reference numeral B in FIG. 5 . Also, the tension roller 22i
is always biased by a spring member (not shown) in a direction to eliminate slack in the belt 23.

The arm case 21 has a position where the slide arm 24 is slightly higher than the mold mounting base 12 by the parallel link type lifting mechanism 30 (position C in FIG. 5), and a position where the slide arm side convex portion 25b is located at the position where the mold is mounted. It is possible to alternatively take two positions: a position lower than the base 12 (the position shown in FIG. 2 or the position D in FIG. 5). That is, a slide rod 32 extending parallel to the case 21 is disposed below the arm case 21, and the arm case 21 is connected to this slide rod 32 with a pin via vertical links 33, 33 to horizontally move the arm case 21. Parallel links are configured as elevating members. The slide rod 32 slides back and forth as the back and forth stroke of a cylinder 34 disposed in the front and back direction within the drive unit frame 31 is transmitted via the crank 35 and the link 36. By sliding the slide rod 32 back and forth, the case 21 moves up and down in the vertical direction, and the slide arm 24 moves up and down. The links 36 of the left and right lifting mechanisms 30, 30 are connected to each other by a crankshaft 35a,
The left and right lifting mechanisms 30, 30 operate in conjunction with each other. Figure 3,
A cross section of the slide arm mechanism 20 is shown in FIG. 4, and as shown in these figures, the vertical link 33 has a guide roller that rolls within the guide groove 13 formed in the mold mount 12. 33a is pivoted to ensure smooth elevating and lowering movements of the elevating mechanism 20, that is, smooth elevating and lowering movements of the slide arm mechanism 20. Furthermore, the slide arm 24
As shown in FIG. 4, the belt 23 that causes the belt to run back and forth extends between the opposing vertical links 33 and 33 below the guide rollers 22a to 22f.

[0012] On the front surface of the bolster 10, a pair of left and right roller conveyors 40 for loading and unloading molds, which extend back and forth, are arranged parallel to the slide arm mechanism 20. The roller conveyor 40 has a structure in which rollers 42 are arranged in series at equal intervals within a frame 41, and the frame 41 is arranged to intersect with a conveying roller conveyor 50 arranged in the left-right direction in front of the bolster 12. There is. The conveying roller conveyor 50 has a structure in which rollers 52, which are wider than the rollers 42 of the roller conveyor 40, are arranged at equal intervals, and the mold conveying surface is set flush with the upper end surface of the mold mounting base 12. There is. And Coro Conveyor 4
0 is disposed in the gap between the rollers 52, 52 of the roller conveyor 50, and the conveyor frame 41 can be moved up and down by a pair of air cylinders 44, 44. That is, the conveyor frame 41 is biased downward by a spring member 46 interposed between the bottom surface 51a of the frame 51 of the conveying roller conveyor 50, and the roller conveyor 40 is normally
is held in a lowered position (a position where the rollers 42 shown in FIG. 2 are lower than the rollers 52). and air cylinder 4
4, the roller conveyor 40 is held at an elevated position (the rollers 42 are higher than the rollers 52). In this way, the mold conveyance surface of the roller conveyor 40 can be selectively placed at a lower position or a higher position than the mold conveyance surface of the transport roller conveyor 50.

Next, the process of loading and unloading the mold will be explained with reference to FIGS. 6 and 7. First, when carrying out the mold W from the bolster 10, the upper mold is placed on the lower mold, the clamp between the lower mold and the mold mounting base 12 is released, and the mold to be replaced W1
The preparations for transport are completed. During this time, the replacement mold W in which the upper mold is placed on the lower mold by the conveyor 50
2 is transported and positioned at a position offset by a predetermined distance from the front of the press. Next, the lifting mechanism 30 is operated to bring the slide arm mechanism 20 to the raised position (see FIG. 5), and the mold W1 to be replaced is supported by the slide arm 24, and the slide arm 24 and the mold W1 are brought into contact with the convex and convex They are connected in the front-back direction through the joint. At the same time, the roller conveyor 40 is raised to bring the conveying surface of the roller conveyor 40 to a position above the conveying surface of the conveying roller conveyor 50 (see FIG. 2). Next, the slide arm mechanism 20 is driven to slide the slide arm 24 carrying the mold W1 to the front of the bolster 10. The mold W1 pushed forward together with the slide arm 24 travels on the roller conveyor 40, and is carried out in front of the bolster 10 as shown in FIG. Here, the lifting mechanism 30 is operated to bring the slide arm mechanism 20 to the lowered position (position C in FIG. 5), and at the same time the roller conveyor 4
0 is also lowered. As a result, the mold W1 is transferred to the conveyor 5.
0. Next, the transport conveyor 50 is driven, and the mold W2 to be replaced is brought to the front position of the bolster 10 (Fig. 7
(See W2 (solid line) position). Then the roller conveyor 40 again
is raised, and the mold W2 is carried on the roller conveyor 40. Next, the lifting mechanism 30 is operated to bring the slide arm mechanism 20 to the raised position, and the slide arm 24 extending spaced apart below the mold W2 is raised to raise the replacement mold W2.
It is connected in the front-rear direction by the concave-convex engaging portion. When the slide arm 24 is pulled into the bolster 12, the mold W2 slides on the roller conveyor 40, and is further carried by the slide arm 24 and carried above the bolster 10 as shown in FIG. And slide arm mechanism 2
0 is the lowered position, and the mold W2 is placed on the mold mount 12. At the same time, the roller conveyor 40 is lowered, and preparations for carrying out the mold W1 to be replaced are completed. The conveyor 50 is driven to convey the mold W1.

[0014]

Effects of the Invention As is clear from the above description, according to the automatic mold loading/unloading device according to the present invention, by operating the elevating mechanism and the slide arm mechanism, The mold to be replaced can be automatically carried out, and the replacement mold on the loading/unloading roller conveyor can be automatically loaded into the bolster.

In particular, by raising and lowering the loading and unloading roller conveyor, automatic loading from the conveying roller conveyor extended in front of the bolster and automatic unloading onto the conveying roller conveyor is also possible, making it possible to completely unattended molds. The replacement process becomes possible, and work efficiency and safety on the press line can be significantly improved.

[Brief explanation of drawings]

[Figure 1] Plan view of the press equipment around the bolster

[Figure 2] Side view of the press equipment around the bolster

[Fig. 3] Longitudinal cross-sectional view of the slide arm mechanism (cross-sectional view along line III-III shown in Fig. 2)

[Figure 4] Longitudinal cross-sectional view of the slide arm mechanism (cross-sectional view along line IV-IV shown in Figure 2)

[Figure 5] Explanatory diagram explaining the loading and unloading action of the mold

[Figure 6]
Explanatory diagram of mold unloading process

[Figure 7] Explanatory diagram of the mold loading process

[Figure 8] Plan view of the area around the bolster of a conventional press machine

[Explanation of symbols]

10 Bolster 12 Lower mold mounting base 20 Slide arm mechanism 21 Slide arm case 22a which is a lifting member
22g Guide roller 24 Slide arm 25a Mold side engagement recess 25b Slide arm side engagement convex portion 30 Elevating mechanism 32 Slide rod 33 Vertical link 40 Roller conveyor 44 for carrying in and out of molds Air that is the elevating means of the roller conveyor for carrying in and out Cylinder 50 Conveying roller conveyor W, W1, W2 Mold

Claims (2)

[Claims] [Claim 1] A pair of left and right roller conveyors for carrying in and out, which are disposed in front and back of the front of the bolster of the press device and have a mold conveying surface higher than the lower mold mounting base on the bolster, and are carried by a plurality of guide rollers. a pair of left and right slide arms, each of which has a slide arm that extends back and forth on the bolster, and whose front end slides back and forth from a position where it projects in front of the bolster parallel to the loading/unloading roller conveyor to a position where it is retracted into the press; a mechanism; and an engagement protrusion that is provided on the slide arm to protrude upward and that engages with an engagement recess formed on the bottom surface of the mold as the slide arm rises, and is connected to the mold in the front-rear direction. , raising and lowering the slide arm mechanism to alternatively take a raised position where the slide arm is flush with the mold conveyance surface of the roller conveyor and a lowered position where the slide arm is lower than the lower mold mounting base; 1. An automatic mold loading/unloading device for a press machine, characterized in that it is equipped with a lifting mechanism capable of lifting and lowering. 2. The loading/unloading roller conveyor intersects with the conveying roller conveyor extending in the left-right direction in front of the bolster, and the loading/unloading roller conveyor can be raised and lowered by an elevating mechanism, so that the loading/unloading roller conveyor 2. The automatic mold loading/unloading device for a press machine according to claim 1, wherein the mold automatic loading/unloading device can be lowered to a position lower than the mold conveying surface of the conveyor.