JPS6338045Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a device for feeding a blank at a feeding position into the press, delivering it to a feed bar, and feeding it to a forming station in a transfer press.

Generally, a cam drive system using a press drive mechanism is known as a feeding motion of this type of device. However, when such a method is adopted,
The configuration becomes complicated, and the cost of manufacturing the cam increases, increasing the cost. Furthermore, this device has drawbacks such as difficulty in adjusting the timing of the feeding operation. In addition, as a simple structure of the above-mentioned feeding means, one using a magnet such as a magnet roll is known, but according to this method, since the blank to be supplied is magnetic, Therefore, there are restrictions on its use.

The purpose of this invention was to take into account the above circumstances; it could be manufactured at low cost with a simple structure without using a magnetic system, and it could also be used to reliably supply blanks to the press in synchronization with its stroke. The objective is to provide a blank feeding device that can.

In this specification, "front and rear" refers to the conveyance direction of blank B (indicated by arrow A in Figure 1), and the side where blank B is fed is referred to as front, the side opposite to this is referred to as rear, and left and right refers to He says, facing forward.

In order to achieve the above object, this invention is a blank feeding device for a transfer press, which forms the frame of this device, and the main body of the device is attached to the press frame so as to be located behind the slide. an elevating body provided in a protruding manner at the rear of the slide; a blank carrier provided movably along a horizontal guide rail formed in the longitudinal direction of the apparatus main body and having a vacuum cup for adsorbing blanks; It is rotatably supported by a horizontal shaft on the device body above the carrier.
and a carrier drive lever whose lower end is connected to the carrier, and whose one end is rotatably supported by a horizontal shaft on the device body so as to be located below the elevating body, and which swings relative to the carrier drive lever. It consists of a sliding transmission lever that is connected to transmit the information to each other.

This idea is suitable for blank carrier feeding movement.
2 connected so as to be able to transmit rocking motion to each other
Since it uses a mechanism with two levers, the structure is simple and can be manufactured at low cost.Furthermore, since the mechanism is driven by a slide stroke, timing adjustment can be easily performed and blanking can be performed reliably. can be supplied.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIG. 1 shows the rear or rear part of a transfer press in which this invented device is installed. At the blank supply position P, blanks B are placed in a stacked state. In front of this blank supply position P, there are first and second idle stations I1 and I2 in order from the inside of the press. The distances l separating these idle stations I1, I2 and the blank supply position P from each other are equal. Feed bars (not shown) extend from the press on the left and right sides of the idle stations I1 and I2. In addition, Idol Station I1, I
2, a blank holder (not shown) is installed.

An apparatus main body 1 forming a frame of the apparatus is attached to the rear surface of the press frame F so as to be located at the rear of the press slide S. Further, the slide S has an elevating body 2 equipped with a height adjusting screw feed mechanism attached to a vertical guide member 21 provided on the rear surface thereof so as to be movable up and down. The screw feeding mechanism includes a screw hole 22 vertically penetrating approximately the center of the elevating body 2, a screw rod 23 screwed into the screw hole 22, and a drive motor 24 connected to the upper end of the screw rod 23. It consists of. By rotating the drive motor 24 forward and backward, the elevating body 2 is moved up and down relative to the slide S. The apparatus main body 1 is box-shaped with an open front and lower surface, and horizontal guide rails 11 are formed at the lower ends of both left and right walls. Guided by these horizontal guide rails 11, the blank conveyance direction A
A blank carrier 3 is movably provided. Furthermore, the apparatus main body 1 is provided with horizontal shafts 12 and 13 at two upper and lower locations above the horizontal guide rail 11, respectively. These horizontal axes 12,1
3 crosses the hollow interior of the device main body 1 from side to side, and its both ends are supported by the left and right side walls. A carrier drive lever 4 is mounted on the upper horizontal shaft 12.
Sliding transmission levers 5 are respectively attached to the lower horizontal shaft 13.

The blank curiae 3 is attached to the horizontal guide rail 1 above.
1, a carriage 32 movably supported via rollers 31 that sandwich these from above and below, an arm lifting cylinder 33 attached vertically downward to the carriage 32, and a rod 3 of this cylinder 33.
3a, and the sliding guide members 34a, 34b
The lift arm 35 is provided on the carriage 32 via a lift arm 35 so as to be movable up and down. When the carriage 32 is at the forward end (as shown by the solid line in FIG. 1), the front end of the lift arm 35 extends below the slide S. In this state, vacuum cups 36 are respectively attached to the lower surface of the lift arm 35 so as to be located directly above the first and second idle stations I1 and I2, separated by the distance l from the front and rear. Of the front and rear vacuum cups 36, the rear vacuum cup 36 is attached to the rod 3 of a cup lifting cylinder 37 that is attached vertically downward to the lift arm 35.
7a via a carrier beam 38, and is movable up and down.

The carrier drive lever 4 is a trident-shaped pair of left and right plate-like bodies when viewed from the side, and is rotatably supported on the upper horizontal shaft 12 via a mounting boss 41. It includes an upper arm 4a that extends toward the front, a lower arm 4b that extends toward the bottom, and an intermediate arm 4c between these arms. One end of a connecting link 6 is rotatably attached to the tip of the lower arm 4b. The other end of the connecting link 6 is rotatably attached to the carriage 32 via a bracket 32a. The tip of the upper arm 4a protrudes outward from an opening 1a formed in the upper rear surface of the device main body 1, and a lever attached to this projecting end is attached vertically upward to the outer surface of the device main body 1. The rod 7a of the force cylinder 7 is connected. Pressurized air is constantly supplied to the cylinder 7 so that the rod 7a protrudes. This urges the carrier drive lever 4 to rotate counterclockwise (in FIG. 1).

The sliding transmission lever 5 is a pair of left and right plate-like bodies formed in a bifurcated shape when viewed from the side. It is provided with upper and lower arms 5a and 5b extending in the vertical direction at the front. The tip of the upper arm 5a is connected to the intermediate arm 4c of the carrier drive lever 4 by a connecting link 8. On the other hand, a slide receiving cylindrical roller 10 is attached to the tip of the lower arm 5b via a swinging member 9. A rod 14a of a swing member restraining cylinder 14 attached near the fulcrum of the sliding transmission lever 5 is connected to the swing member 9. This cylinder 14 is connected to its rod 14
When a protrudes, it assumes a posture substantially parallel to the lower arm 5b, and the swinging of the swinging member 9 is restrained in a state where the swinging member 9 extends substantially on an extension line of the lower arm 5b. In this state, the cylindrical roller 10 is located below the elevating body 2, and when the slide S descends to a predetermined height, it comes into contact with the lower surface of the elevating body 2 and is pushed down as the slide S descends. Further, when the rod 14a of the restraining cylinder 14 is retracted, the swinging member 9 rotates counterclockwise (in FIG. 1) around the tip of the lower arm 5b, and the cylindrical roller 10 Evacuate from below. As a result, the drive of this invented device is separated from the operation of the press, making it possible to drive the press independently.

Further, FIG. 4 shows a part of the external appearance of the invented device. A guide plate 16 is provided at the front end of the device main body 1 in a downwardly projecting manner. The lower surface 16a of this guide plate 16 is formed into a curved surface that slopes downward toward the front. Further, a guide roller 39 is attached to the upper surface of the lift arm 35 via a bracket 35a. This guide roller 39 is the guide plate 1
6 and moves further forward, the lift arm 35 is pushed down.

Next, the operation of this device will be explained with reference to FIG. FIG. 5 shows a timing diagram of the press and its equipment. Figures 1 to 4
In the figure, the state when the press slide S is located at the bottom dead center (corresponding to a crank angle of 180° in FIG. 5) is shown by a solid line. In this state, the carriage 32
is at the forward end position, and as described above, the lift arm 35 is pushed down by the guide plate 16 and the guide roller 39 and is at the lower limit position. The blank B, which had been adsorbed to the vacuum cup 36, is released from adsorption and placed on the cradle of the first and second idle stations I1 and I2. The feed bar is being retracted in order to feed this blank B into the forming station in the next cycle. Then, as the slide S rises, the slide receiving cylindrical roller 10 loses support from the elevating body 2, and
Due to the cylinder pressure of the lever biasing cylinder 7, the sliding transmission lever 5 rotates clockwise around the horizontal shaft 13, and the carrier drive lever 4 rotates counterclockwise around the horizontal shaft 12. This causes the carriage 32 to be moved rearward. When the carriage 32 moves close to the rear end, a descending command is issued to the arm elevating cylinder 33 that once lifted the lift arm 35 to the upper limit position, and the lift arm 35 starts moving to the lower limit position again. Around this time, the feed bars approach each other in the retracted position, grab the blank B placed on the first idle station I1, raise it, and then start moving forward. When the lift arm 35 is lowered to the lower limit position, the cup lifting cylinder 37 is lowered at the blank supply position P, and the uppermost blank B stacked at the blank supply position P is adsorbed at the lower limit position. At the same time, lift arm 3
The blank B placed on the second idle station I2 is also attracted to the front vacuum cup 36 of No. 5. In this way, when the blank B is attracted to the front and rear vacuum cups 36 of the lift arm 35, the arm lifting cylinder 33
and the rod 33 of the cylinder 37 for lifting and lowering the cup.
a and 37a start to rise. On the other hand, the slide S that has reached the top dead center immediately reverses itself and descends, and eventually the slide receiving cylindrical roller 10 comes into contact with the lower surface of the elevating body 2. At this point, the blanks B attracted to the lift arms 35 have been lifted to their respective upper limit positions. When the slide S further descends, the cylindrical roller 10 is pushed down, thereby overcoming the cylinder pressure of the lever biasing cylinder 7 and rotating the carrier drive lever 4 and the sliding transmission lever 5 in the opposite direction as described above. The carriage 32 moves forward. The feed bar is lowered and spaced apart at the forward end to feed the blank into the forming station. When the carriage 32 moves to the forward end, the adsorption of the vacuum cup 36 is released and the blanks B are placed on the first and second idle stations I1 and I2, respectively.

In this way, in one cycle of the device in synchronization with the stroke of the slide S, the blank B that was at the blank supply position is sent to the second station I2, and at the same time, the blank B from the second idle station I2 is sent to the first station I2.
The blank B, which was conveyed to the idle station I1 and conveyed to the first idle station I1 in the previous cycle, is delivered to the feed bar and fed into the forming station.

[Brief explanation of drawings]

The drawings show an embodiment of the invention; FIG. 1 is a side view, FIGS. 2 and 3 are sectional views taken along lines - and -, respectively, of FIG. 1, and FIG. 4 is an external view. FIG. 5 is a timing diagram. 1... Apparatus main body, 2... Lifting body, 3... Blank carrier, 4... Carrier drive lever, 5...
Sliding transmission lever, 6, 8... link,
11...Horizontal guide rail, 12, 13...Horizontal shaft, 36...Buckium cup, F...Press frame, S...Slide.

Claims (1)

[Scope of utility model registration request] This is a blank feeding device for a transfer press, which forms the frame of this device, and includes a device main body 1 attached to a press frame F so as to be located behind the slide S, and a projecting shape at the rear of the slide S. and a horizontal guide rail 11 formed in the front-rear direction on the device main body 1.
A blank carrier 3 is provided to be movable along the axis and has a vacuum cup 36 for adsorbing blanks, and is rotatably supported by a horizontal shaft 12 on the main body 1 of the apparatus above the carrier 3, and the lower end of the carrier 3 A carrier drive lever 4 connected to the carrier drive lever 4 is rotatably supported on the device main body 1 by a horizontal shaft 13 such that one end is located below the elevating body 2, and swings relative to the carrier drive lever 4. A blank feeding device for a transfer press, which is composed of a sliding transmission lever 5 that is connected to each other so as to transmit information.