JPS5933448B2 - press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press that allows smooth exchange of press dies.

For large presses, the weight of the press die is large, so a fixed or movable press die change table is installed adjacent to the bolster, and the press die is transferred between the press die change table and the bolster. is being carried out.

FIG. 1 is a diagram showing an example of a conventional press, in which a press type exchange table 2 installed adjacent to a bolster 1 is driven via a sprocket 4 by a drive source 3 installed therein. An endless chain 5 is attached, and a press die W consisting of an upper die W1 and a lower die W2 is attached to the chain 5.
A hook 7 that engages with a hook 6 provided on the lower die W2 is attached. Furthermore, the press exchange table 2 has a press mold W.
A plurality of rows of rollers 8 are attached to the bolster 1 so that it can move smoothly, and a plurality of rows of rollers 9 are similarly attached to the bolster 1, and the rollers 9 can be moved up and down by a hydraulic cylinder 10. Therefore, in order to move the press die W from the state placed on the press die change table 2 as shown by the solid line in FIG. To move the press die W from the bolster 1 to the press die exchange table 2, the chain 5 is driven in the opposite direction to the above-mentioned direction and the press die W is pulled out. There is. In such a conventional press, the press die W is fed in and pulled out by the hook T attached to the endless chain 5 of the press die change table 2, while running with full force. The movement stroke of No. 7 is limited to the width of the press die changing table, and this hook can only approach the end of the bolster on the press die changing table side.

Therefore, for press molds that are small compared to the shape of the bolster, it is not possible to move the press mold to the center of the bolster with a press like the one shown in Figure 1, so it is necessary to manually move the repress mold to the center of the bolster. You need to push it all the way to the center.
There was a problem that not only was there a lack of safety in changing press dies, but also that the number of dies to be set was not significantly reduced. If the hook is attached to the press die changing table in this way, the chain must be accommodated in the press die changing table, and the chain cannot be made very long.

If it is made longer, the press die exchange table will have to become large, which is impractical. However, the cart houses a motor for driving the chain, which takes up space. The present invention has been made by focusing on the problems of the prior art,
The purpose of the present invention is to enable press dies of various shapes to be installed at arbitrary positions by making it possible to transfer a chain with a hook attached to the tip from a bolster to a cart. Next, an explanation will be given based on an embodiment of the present invention shown in FIGS. 2 to 7.

A ram 12 that is movable up and down is mounted above the bolster 1 installed on a base 11 by a column (not shown). A rail 13 is laid on the base 11, and the end of the rail 13 reaches close to the bolster 1. A press-type exchange cart 2a having wheels 14 rolling on this rail 13 is placed on the rail 13, and with this cart 2a adjacent to the bolster 1, there is a Press mold W consisting of upper and lower molds W,, W2
The exchange will take place. In order to lock the truck 2a to the bolster 1 during this exchange, a rotary hook 16 that engages with a fixed hook 15 attached to the bolster 1 is rotatably attached to the truck 2a, and a cylinder 17 attached to the truck 2a is attached.
A rod 18 is connected to the pivot hook 16. In order to smoothly move the press die W on the trolley 2,
As is clear from FIG. 3, there are rollers 8a on the trolley 2a.
Column installed. In order to exchange the press mold between the bolster and the truck, the two grooves 19 formed in the front and rear directions of the bolster are provided with a band-shaped groove 20 on the upper surface thereof, as shown in FIG. Chain guide 21 with a box-shaped cross section
A roller chain 22 is housed therein, and a hook 24 is rotatably attached to a base member 23 attached to the tip of the roller chain 22, as shown in FIG.

When the roller chain 22 approaches the press die W, this hook 24 engages with a hook 25 provided on the lower die W2 of the press die W, and the press die W can be pulled out by the hook 24.

Further, since the press die 7W is pushed forward by the advancement of the roller chain, a contact surface 26 is formed on the front surface of the base member 23. A coil spring 27 is attached between the hook 24 and the base member 23, and applies an engaging force to the hook 24. This roller chain 22 meshes with a sprocket 28 attached to the bolster 1, and as shown in FIGS. The bevel gear 33 attached to the main shaft 32 of the main shaft 32 meshes with the bevel gear 33. As is clear from FIG. 3, the shaft 29 is supported by a bearing 34 attached to the back of the bolster 1. The portion of the roller chain 22 that engages with the sprocket 28 is guided by a roller guide 35 attached to the bolster 1, and the other end of the roller chain 22 is suspended within a roller guide 35a embedded in the base 11. The shaft 29 is equipped with a torque limiter 36 in order to prevent power from being transmitted to the roller chain 22 when an overload is applied to the drive source 31.
is installed. A chain guide 21 is installed on the trolley 2a.
A chain guide 37 having the same shape as this is installed opposite to the chain guide 37, which drives the drive source 31 to drive the sprocket 28.
When the hook 23 is rotated in the direction A in FIG. 4, the hook 23 moves rearward on the bolster 1. When the sprocket 28 is rotated in the opposite direction, the hook 23 moves toward the front of the bolster 1. At this time, since the roller chain 22 is restricted by the upper and lower surfaces of the chain guide 21, the hook 23 is pushed forward without being bent. When the hook 23 moves further forward, the hook 23 moves into the chain guide 27 attached to the truck 2a and can move forward therein without being bent. Press mold W into bolster 1
In order to ensure that the press mold moves smoothly when moving on top of the bolster 1, and to ensure that the bottom surface of the press mold and the top surface of the bolster 1 are in close contact when fixing the press mold W on the bolster 1, a Groove 38 formed in the front-rear direction
As shown in FIG. 7, a roller holding member 39 having a substantially U-shaped cross section is attached to the roller holding member 39, and rollers 40 are attached to this roller holding member 39 at predetermined intervals.

Further, this roller holding member 39 is vertically movable by a cushion pin 4 attached to the bolster 1 so as to be vertically movable. This vertical movement stroke E is caused by the upper surface of the protrusion 42 protruding from the roller holding member 39 and the protrusion 4 of the groove.
3 and the lower surface thereof. Cart 2 on which the press mold W is placed at a press mold mounting position not shown
a is driven by the arrow B by driving the wheels 14 of the truck 2a.
It runs on rails 13 in the direction and is installed adjacent to the bolster 1.

Under this condition, the cylinder 17 is operated to connect to the hook 15 on the bolster side and fix the truck 2a. Next, the rotational force of the drive source 31 is transferred to the shaft 2 through a bevel gear 33 connected and fixed to the drive source 31 and a bevel gear 30 connected and fixed to the shaft 29.
9. The rotational force transmitted to the shaft 29 is passed through the sprocket 28, and the roller chain 22 is moved in the direction indicated by the arrow L.
move forward in the direction. The roller chain 23 is not in the shape of an endless ring or loop, but in the form of a single string having both ends, and is guided by the chain guide 21 and moves forward. By advancing the roller chain 23 until it comes into contact with the press die W, the hook 24 is engaged with the hook 25. Next, the drive source 31 is reversed, the roller chain 23 is moved backward in the direction of arrow B, and the press die W is drawn onto the bolster 11 while moving on the rollers 8a disposed on the cart 2a. In this way, place the press mold W on the bolster 1.
When pulling in, the cushion pin 4 is raised by a dictation (not shown).

As a result, the roller holding member 39 moves up by the stroke E, and the press die W is supported by the roller 40. When the press die W reaches a predetermined position on the bolster 1, the press die W is detected using an appropriate means not shown in the drawings, and the drive source 31 is stopped based on the signal of this detection, and at the same time, the cushion pin 4 is lowered. As a result, the roller holder 39 is lowered and the press die W is placed on the bolster 1. In order to replace the press die on the bolster 1 with another press die W,
To move it to the trolley 2a, the drive source 31 is activated and the roller chain 22 is moved forward. At this time, the contact surface 26 of the hook 24 connected to the tip of the chain hits the side surface of the holder of the press mold W, and the roller chain 22 is further advanced and the roller chain 22 is connected to the chain guide 3 of the cart 2a.
7, the hook 24 is advanced until the press die W is located at a predetermined position on the carriage 2a. Bolster 1 also at this time
The roller holding member 39 disposed in is raised by the cushion pin 41, and the press mold W is lifted from the upper surface of the bolster 1.
The press die W is received by the mouth roller 40 to facilitate transportation of the press die W. Further, when on the carriage 2a, the press die W is received by rollers 8a. If the press mold to be replaced is a distance G from the front end of the cart on the bolster side, such as the press mold shown by the imaginary line in FIG.
Since the roller chain 22 sent out from the side chain guide 21 moves into the chain guide 37 of the trolley 2a, any size mold can be easily replaced as long as it is a press die W that can be placed on the trolley 2a. . Further, when the press die W sent out from the bolster 1 to the carriage 2a reaches a predetermined position on the carriage 2a, a detection mechanism (not shown) detects the press die and stops the drive source.
It is designed to prevent the press die W from falling. In the illustrated embodiment, a truck movable on rails is used as the press type exchange table, but a fixed type table may also be used. However, it is better to use a movable truck because the truck can be separated from the bolster, so it is easier to work with. According to this invention, a groove is formed on the upper surface of the press bolster, and a hook that can be engaged with and detached from the press die is slidably provided in the groove, and the chain is guided and slidably provided in the groove. Attaching the hook to one end, winding the chain around a sprocket driven by a drive means provided on the press, and providing a chain guide communicating with the groove on a cart that is movable to a position adjacent to the bolster; Since the hook can be transferred from the bolster to the trolley, the hook that engages with the press die attached to the roller chain can be transferred to both the bolster and the press die exchange table, which eliminates the need for manual labor. The press mold can be automatically hemmed to any position on the bolster or the press mold exchange table without any need.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional press, Fig. 2 is a side view showing a press according to an embodiment of the present invention, Fig. 3 is a plan view of Fig. 2, and Fig. 4 shows a die conveying chain. Fig. 5 is an enlarged sectional view showing the structure of the main parts that operate, Fig. 5 is an enlarged sectional view showing the hook part attached to the chain, Fig. 6 is an enlarged sectional view showing the chain guide part, and Fig. 7 is an enlarged sectional view showing the roller holding member. FIG. 1... Bolster, 2a... Press type exchange trolley, 21... Chain guide, 22...
...Laura Chie-ichi 4,25...Fuku, 37
...Chain guide.

Claims (1)

[Claims] 1. A groove is formed on the upper surface of the press bolster, a hook that can be engaged with and detached from the press mold is slidably provided in the groove, and the hook is attached to one end of a chain that is slidably provided while being guided in the groove. , the chain is wound around a sprocket driven by a drive means provided on the press, and a chain guide communicating with the groove is provided on a trolley that can be moved to a position adjacent to the bolster, and the hook is connected to the bolster. A press characterized in that the press can be transferred from the cart to the cart.