JPH0114359Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a transfer bar coupling device mainly used in a three-dimensional transfer press.

Conventionally, a three-dimensional transfer press is provided with a transfer bar for transporting a workpiece, and this transfer bar is divided into a plurality of parts, and each of the divided bar members is connected by a connecting device.

The above-mentioned conventional coupling device includes, for example, a cylinder in which a pin d provided in a direction orthogonal to the above-mentioned pin a is inserted into and removed from one of bar members b and c connected to each other by a pin a, as shown in FIG. Some are equipped with e. In the above coupling device, when dividing the bar members b and c, first the pin d is moved backward by the cylinder e, then one bar member c is raised and the pin a is extracted from the other bar member b, and each The bar members b and c are separated from each other. However, in this type of coupling device, the looseness of each pin a, d greatly affects the vertical deflection of each bar member b, c, and there is a problem that the vertical movement of each bar member b, c cannot be performed smoothly.

This invention was made with the aim of improving this problem, and the pins that regulate the movement of each bar member in each direction were made wedge-shaped to eliminate looseness, thereby allowing each bar member to move up and down smoothly. The present invention aims to provide a coupling device for a transfer bar.

An embodiment of this invention will be described below in detail with reference to the drawings shown in _FIG . It is divided into 1 and ₂ . Cylindrical pin members 3 are provided at both ends of the central member 1 ₁ and can be fitted into fitting holes 2 opened in the end faces of both end members 1 ₂ . Inside the pin member 3, a tapered connecting pin 4 whose diameter gradually decreases on the distal end side is accommodated so as to be freely protrusive and retractable from within the pin member 3. The base end side of the connecting pin 4 is fixed to the tip of a piston rod 5a of a cylinder 5 installed in the central member ₁₁ , and is moved forward and backward toward both end members ₁₂ by this cylinder 5, and both pin members 3 A key 6 is provided on the outer periphery of the distal end side of the key 6, which fits into a groove 2a formed on the inner surface of the fitting hole 2 of both end members 1 ₂ to position the members 1 ₁ and 1 ₂ .

Further, a wedge member 7 is located approximately in the middle of the pin member 3.
is supported in a guide hole 3a provided in a direction perpendicular to the axis of the pin member 3. The above wedge member 7
is divided into two parts, with an inclined surface 7 on the inside and outside.
a, 7b are formed, and the tip portion on which the inclined surface 7b is formed is protruded so as to be freely retractable into the wedge chamber 2a provided in the middle of the fitting hole 2. The inclined surface 7b is pressed against the inclined surface 2b formed in the opening, and the inner inclined surface 7a is in contact with the tapered surface 4a of the connecting pin 4, so that the connecting pin 4 is prevented from advancing. Accordingly, each wedge member 7 is arranged so that it can be expanded.

On the other hand, one end side of a pair of locking pins 10 is press-fitted into the tip of the pin member 3, and the tips of these locking pins 10 are fitted into the recesses 7c formed in the end faces of each wedge member 7. As a result, each wedge member 7 is prevented from coming out of the guide hole 3a of the pin member 3, and a biasing force for biasing the wedge member 7 is provided on both sides of the wedge chamber _2a provided in the both end members 12. Means 20 are provided. The biasing means 20 has a pressing element 20a housed in a spring chamber 1a formed in both end members ₁₂ . The presser 20a has projections 20b that protrude into and out of the wedge chamber 2a, and the tips of these projections 20b press the wedge members 7 in a direction toward each other. The presser 2 is placed between the presser 20a and the spring receiver 20c screwed into the opening of the spring chamber 1a.
A compression spring 20d is provided that biases Oa toward the wedge member 7 side.

Next, to explain the operation, while the transfer press is in operation, the central member 1 ₁ and both end members 1 ₂ are in a connected state as shown in Figures 1 and 2. When dividing between ₁ and both end members 1 _{and 2} , first fix the movement of the center member ₁ in the feed direction using fixing means (not shown), and then supply hydraulic pressure or chamber pressure to the rod side of the cylinder 5 in this state. to move the connecting pin 4 backward.

As a result, the tapered surface 4 of the connecting pin 4
The wedge members 7, which had been expanded at point a, are pushed toward each other by the urging means 20, and the outer inclined surface 7b of the wedge member 7 and the inclined surface 2b provided at the opening of the wedge chamber 2a are As each wedge member 7 is disengaged, each wedge member 7
Since the tip of the is inserted into the pin member 3, in this state, both end members ₁₂ are pulled in a direction away from the central member ₁₁ by a bar separation device (not shown), thereby separating the center member ₁₁ and both end members ₁₂ . can be separated.

Next, when connecting both end members 1 ₂ to the central member 1 1 which has been carried into the transfer press together with the mold after the mold has been replaced, advance both end members _{1 2 toward} the central member 1 ₁ side. The fitting holes 2 of both end members 1 ₂ are fitted into the pin members 3 provided on the central member 1 ₁ side.

At this time, both members 1 ₁ and 1 ₂ are positioned using the key 6, and when the end faces of both end members _{1 2} come into contact with the end faces of the central member 1 1 , hydraulic or pneumatic pressure is supplied to the head side of the cylinder 5. The connecting pin 4 enters between the wedge members 7, and each wedge member 7 is expanded at the tapered surface 4a, and the inclined surface 7b at the tip is brought into pressure contact with the inclined surface 2b in the wedge chamber 2a. ₁ and both end members 1 _{and 2} can be connected without any play.

As detailed above, this idea expands the wedge member with the tapered surface of the connecting pin that is moved forward and backward by the cylinder, and presses the inclined surface provided at the tip of the wedge member against the inclined surface provided on both end members. Since the center member and both end members are connected by moving the central member to the end members, each member can be connected without any play in the lift clamp and feed directions, and this prevents vertical movement of the transfer bar. It will be possible to do it smoothly.

Furthermore, when the wedge member 7 is expanded by the connecting pin 4, a load is applied in the axial direction of the compression spring 20d via the presser 20 supported so as to be movable in the direction of engagement and separation of the wedge member 7. A transfer valve that applies a load to a compression spring from a direction (for example,
-92969 Publication), the compression spring does not wear out prematurely, allowing good splitting operation over a long period of time, and maintenance is easy as there is no need to frequently replace the compression spring. becomes.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, with FIG. 1 being a cross-sectional view, FIG. 2 being a longitudinal sectional view, and FIG. 3 being a cross-sectional view of FIG.
A sectional view taken along the line, FIG. 4, is an explanatory diagram of the conventional method. 1 is a transfer bar, 1 ₁ is a central member, 1 ₂ is both end members, 2 is a fitting hole, 2b is an inclined surface, 3 is a pin member, 4 is a connecting pin, 4a is a tapered part, 5 is a cylinder, 7 is a wedge The members 7a and 7b are inclined surfaces, and 20 is a biasing means.

Claims (1)

[Scope of utility model registration request] A pin member 3 that can be inserted into and removed from a fitting hole 2 opened at the ends of both end members 1 ₂ is provided at the end of the central member 1 ₁ side of the transfer bar ₁ which is divided into the central member 1 ₁ and both end members 1 2 . A tapered connecting pin 4 that can be freely extended and retracted by a cylinder 5 is provided in this pin member 3, and a tapered portion 4 of the connecting pin 4 is provided on the both end members ₁₂ side.
A plurality of wedge members 7 are provided so as to sandwich the connecting pin 4, and these wedge members 7 have inclined surfaces 7a and 7b that can come into contact with the tapered portion 4a of the connecting pin 4 and the inclined surfaces 2b provided on both end members ₁₂ , respectively. are provided on the inner and outer surfaces, and in the vicinity of the wedge member 7 are a plurality of pressers 20a supported movably in the cutting direction of the wedge member 7, and a compressor for press-contacting these pressers 20a to each wedge member 7. Spring 2
A transfer bar coupling device comprising a biasing means 20 of 0d.