JPH0735624Y2 - Feed bar attachment / detachment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a transfer press, in which a middle portion is provided between a pair of end feed bars supported by a feed bar support so as to be concentric in the feed bar feed direction. The present invention relates to a feed bar attaching / detaching device for connecting and arranging feed bars.

[Prior Art] Conventionally, in this type of feed bar attaching / detaching device,
As shown in Japanese Patent No. 5782, the end face of the end feed bar is provided with a joining surface that is inclined downward to the side of the intermediate feed bar, and the end feed bar can have a lock rod protruding and retracting from the inclined surface at the center of the joining surface. Equipped with a simple cylinder device,
A joint surface that matches the joint surface of the end feed bar is provided at the end surface of the intermediate feed bar, and a lock hole that opens to the inclined surface at the center of the joint surface is provided to join the end feed bar and the intermediate feed bar. The surfaces are aligned with each other, and the lock bar is projected from the end feed bar side and inserted into the lock hole at the end of the intermediate feed bar for connection.

[Problems to be solved by the device]

However, the joining surface provided on the end surface of the end feeder bar is slightly inclined from the upper surface, followed by the uneven portion composed of the downward trapezoidal portion and the upward trapezoidal portion, and the long inclined surface following it. It is composed of a concavo-convex part consisting of a downward trapezoidal part and an upward trapezoidal part, and further a slight inclined surface to the lower surface following this, and is inclined downward to the intermediate feed bar side, and the end face of the intermediate feed bar is Since a joining surface that matches the joining surface of the end feed bar is provided, it is necessary to pull out the intermediate feed bar upward to remove it when the lock rod is pulled out from the intermediate feed bar by the cylinder device. , The removal device had to be installed on the press side. In addition, since the feed bar receives a large bending and torsion moment due to the movement of the fingers attached to the feed bar, the material to be sandwiched and the feed bar itself, the connection between the end feed bar and the intermediate feed bar is against this moment. Although it can be done reliably, the joint structure between the end feed bar and the intermediate feed bar may cause the joint surfaces to bite, making it difficult to remove the intermediate feed bar. It was inevitable that a removable device was needed.

[Purpose of device]

The present invention has been made to solve the above-described problems, and an object thereof is to enable easy and reliable connection / disconnection by inserting / removing a lock rod, and to make it possible to remove the intermediate feed bar by a drop method.

[Means for Solving the Problems]

As shown in the drawing, the feed bar attaching / detaching device of the present invention is provided with one joint surface 4a which is inclined downward to the side opposite to the intermediate feed bar 2 on the end surfaces of the end feed bars 1, 1 '. A pair of L-shaped pieces 5 are provided so as to face each other on both sides, and the tip end portion of the L-shaped piece 5 faces the one joint surface 4a, and the other portion inclined downward to the intermediate feed bar 2 side. A joint surface 4b is provided, and a cylinder device 8 capable of projecting and retracting the lock rod 10 is provided between the one joint surface 4a and the L-shaped piece 5 on each of the end feed bars 1, 1 ', and a head 9 at the tip of the lock rod 10 is provided. A forward push-up surface 11 inclined downward to the intermediate feed bar 2 side is provided in the upper part, and a lower protrusion 12 is provided in the lower part of the tip of the head 9 to provide a rear portion of the lower protrusion 12 and an intermediate feed bar 2 side. A backward push-down surface 13 that is inclined downward is provided, and the end surface of the intermediate feed bar 2 is An engaging piece 14 having a T-shape in plan view projecting toward the end feeder bars 1 and 1'side is projectingly provided at a central portion in the width direction, and the head 15 at the tip of the engaging piece 14 and the rear end surface thereof are respectively described above. Joining surfaces 4a provided on the end feed bars 1, 1 ',
Providing joint surfaces 16a, 16b compatible with 4b, in the engagement piece 14,
A lock hole 17 into which the head 9 at the tip of the lock rod 10 can be fitted.
And the head 9 of the lock bar 10 is provided above the lock hole 17.
A lock rod receiving surface 18 that conforms to the upper surface is provided, and the lower protruding portion 12 of the head 9 at the tip of the lock rod 10 is provided at the bottom of the lock hole 17.
It is characterized in that a concave portion 17a in which a groove is inserted is formed, and the above-mentioned object is achieved by such a configuration.

[Action]

After the intermediate feed bar 2 is lifted and the engaging pieces 14 at both ends are respectively inserted and temporarily held between the L-shaped pieces 5 of the end feed bars 1, 1 ', the lock rod 10 is moved by the cylinder device 8 to the intermediate portion. When inserted into the lock holes 17 at both ends of the feed bar 2, the forward push-up surface 11 at the tip of the head 9 comes into contact with the lock rod receiving surface 18 at the upper part of the lock hole 17, so if the head 9 is further pushed and moved, a cam-like action is obtained. The intermediate feed bar 2 is lifted by the action, and the joining surfaces provided on the end feed bars 1, 1 '
Joining surfaces 16a, 16b provided on the intermediate feed bar 2 and 4a, 4b
And abut each other to complete the connection.

Contrary to the above, when the lock rod 10 is retracted by the cylinder device 8, even if the friction force between the joint surfaces 4a, 16a, 4b, 16b is large and the intermediate feed bar 2 or the self-weight does not drop the head, 9 The backward push-down surface 13 provided on the lower protruding portion 12 at the lower end of the tip comes into contact with the lock rod receiving surface 18 of the lock hole 17, and when the lock rod 10 is further retracted, the pushing force of the intermediate feed bar 2 acts. The intermediate feed bar 2 can be forcibly dropped.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 and 1'are a pair of end feed bars, 2 is an intermediate feed bar, and the intermediate feed bar 2 is joined and arranged between the end feed bars 1, 1'to form a single feed bar. used.

The end feedbars 1, 1'are supported by a feedbar support 3 of the transfer press so as to be concentric in the feedbar feed direction so that they can be guided.

On the end faces of the end feed bars 1, 1 ', one joint surface 4a is provided which is inclined downward to the side opposite to the intermediate feed bar 2 side. A pair of L-shaped pieces 5 forming a female engaging portion having a lip groove shape in a plan view opened between the end feed bars 1 and 1 ′ are projected at both ends of the one joint surface 4 a so as to face each other. The other end of the L-shaped piece 5 is provided with the other joint 4b facing the one joint surface 4a and inclined downward toward the intermediate feed bar 2 side.

In addition, a hollow portion 6 is provided in each of the end feed bars 1, 1 ', and a lock rod fitting hole 7 that opens to a substantially central portion of the joint surface 4a is formed at the end of the hollow portion 6. A recess 7a is provided in the lower portion of the tip of the joint hole 7 to receive a lower protrusion 12 at the tip of the head 9, which will be described later. A cylinder device 8 (hydraulic cylinder in the embodiment) is fixedly housed in the hollow portion 6, and a lock rod 10 having a head 9 having a rectangular cross section is connected to the tip of the piston rod of the cylinder device 8. ing. The head 9 is movably fitted in the lock rod fitting hole 7.

A forward push-up surface 11 that is inclined downward toward the intermediate feed bar 2 is provided at the upper end of the head 9, and a lower protrusion 12 is provided at the lower end of the head 9 and a rear portion of the lower protrusion 12 is provided. Is provided with a backward push-down surface 13 which is inclined downward toward the intermediate feed bar 2 side.

An engaging piece 14 having a T-shape in plan view projecting toward the end feeder bar 1 (1 ') is provided at a substantially central portion in the width direction of the end surface of the intermediate feed bar 2, and the tip surface of the head 15 and the engaging piece 14 are provided. The rear end faces are respectively joined to the end feed bar 1 (1 ') and are joined downwardly and inclined to the end feed bar 1 (1') so as to match the downwardly enlarged joint faces 4a and 4b. 16a and the joining surface 16 that is inclined downward to the opposite end feed bar 1 (1 ') side
b is provided. The engaging piece 14 is provided with a lock hole 17 that opens at a substantially central portion of the joining surface 16a at the tip of the head 15, and the head 9 at the tip of the lock rod 10 can be fitted into the lock hole 17. Has become.

A lock rod receiving surface 18 adapted to the upper surface (advancing push-up surface 11) of the tip of the head 9 is provided above the lock hole 17, and a lower portion of the lock hole 17 below the tip of the head 9 is provided at the bottom of the lock hole 17. A recess 17a into which the protrusion 12 is inserted is provided, and by the formation of the recess 17a, a receiving portion 19 capable of contacting the lower protrusion 12 is provided below the tip of the lock hole 17.

In the above configuration, when the intermediate feed bar 2 is arranged to be joined between the end feed bars 1, 1 ′, first, the intermediate feed bar 2 is lifted from below by the lift means 20 or the like to provide the intermediate feed bar 2. The engaging pieces 14 are inserted between the L-shaped pieces 5 provided on the end feed bars 1 and 1 ', respectively, and the intermediate feed bar 2 is inserted into the end feed bars 1, 1'.
It is temporarily held in between (see FIG. 6). Next, the lock rod 10 is moved forward by the cylinder device 8 to cause the head 9 to project from the joint surfaces 4a of the end feed bars 1 and 1'and open to the joint surfaces 16a at both ends of the intermediate feed bar 2. 1
Insert in 7. Then, the forward push-up surface 11 provided on the upper portion of the tip of the head 9 comes into contact with the lock rod receiving surface 18 provided on the upper portion of the lock hole 17, so that the head 9 is further pushed and moved. The intermediate feed bar 2 is lifted by the cam-like action at that time, and the joining surfaces 4a and 4b provided on the end feed bars 1 and 1'and the joining surface 16 provided on the intermediate feed bar 2 are provided.
a and 16b contact each other (see FIG. 3). The connection is completed in this state.

From the end feed bar 1, 1'to the intermediate feed bar 2
In the case of removing the lock rod, the lock rod 10 is retracted by the cylinder device 8 contrary to the above. Bonding surfaces 4a / 16a, 4b / 1 due to dust trapping, etc.
If the frictional force between the 6b is large, the intermediate feed bar 2 does not drop by its own weight, but the retreating push-down surface 13 of the lower protrusion 12 provided at the lower end of the lock rod 10 due to the retreat of the head 9 at the tip of the lock rod 10 causes a lock hole. The intermediate feed bar 2 can be forcibly dropped because it comes into contact with the lock rod receiving surface 18 provided at the bottom of the 17 and the pressing force of the intermediate feed bar 2 acts (see FIG. 7).

[Effect of device]

As described above, according to the present invention, it is possible to forcibly connect / disconnect the end feed bar and the intermediate feed bar by moving the lock rod forward / backward, and the operation is simple and reliable, but the joining strength is sufficient. Can be secured. Also, since the intermediate feed bar can be removed from between the feed bars by a drop method,
It is not necessary to provide a take-out device on the press side as in the conventional case, only the trans-feeder side is required, and the facility is simplified.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of the present invention, and FIG.
1 is an enlarged plan sectional view of FIG. 1, FIG. 3 is an enlarged view of a main part of FIG. 2, FIG. 4 is a sectional view taken along line A- of FIG. 3, and FIG. 5 is B- of FIG. Sectional views taken along the lines, FIG. 6, and FIG. 7 are explanatory views of the operation. 1, 1 '... end feed bar, 2 ... intermediate feed bar, 3 ... feed bar support, 4a, 4b ... joining surface, 5 ... L-shaped piece, 7 ... lock rod fitting hole, 7a ... recess, 8 ... cylinder device, 9 ... head, 10 ... lock rod, 11 ... forward push-up surface, 12 ... downward projection, 13 ... reverse push-down surface, 14 ... engagement One, 15 ... Head, 16a, 16b ...
… Joint surface, 17 …… Lock hole, 17a …… Recess, 18 …… Lock rod receiving surface, 19 …… Receiving part.

Claims (1)

[Scope of utility model registration request] 1. A feed bar attaching / detaching device, wherein one end face of an end feeder bar is provided with one joint face inclined downward to the side opposite to the intermediate feed bar, and a pair of L-shaped pieces are provided on both sides of the one joint face. Are provided so as to face each other, and the other joining surface inclined downward to the intermediate portion feed bar side is provided at the tip of the L-shaped piece so as to face the one joining surface. A cylinder device capable of retracting the lock rod between the L-shaped piece from the joining surface of the lock rod is provided, a forward push-up surface inclined downward to the intermediate feed bar side is provided at the upper portion of the head of the lock rod tip, and a lower portion of the head tip is provided. A lower protrusion is provided, and a rearward pushing-down surface inclined downward to the intermediate feed bar side is provided at the rear of the lower protrusion, and the end feeder bar side is provided at the substantially central portion in the width direction of the end face of the intermediate feed bar. T-shaped protrusion in plan view And a joining surface that is compatible with the joining surface provided on the end feed bar is provided on each of the head front end surface and the rear end surface of the engaging piece tip. Providing a lock hole into which the head can be inserted,
A lock rod receiving surface that conforms to the upper surface of the head of the lock rod is provided at the upper portion of the lock hole, and a recessed portion into which the lower protrusion of the head at the tip of the lock rod is formed is formed at the lower portion of the lock hole. Feed bar attachment / detachment device.