JPH0233926Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the mounting structure of the upper apron in a press machine such as a press brake, and more specifically, when the upper apron is firmly fixed to the side frame of the press machine, the upper apron Regarding the mounting structure with less distortion.

Conventionally, some press machines such as press brakes are configured to move a movable apron (ram) supporting a lower mold up and down relative to an upper apron supporting an upper mold. In this type of press machine, the left and right sides of the upper apron are attached to the upper parts of the left and right side frames.

The structure for attaching the upper apron to the side frame is such that the upper apron is attached to the side frame by engaging the protrusions formed on the front surface of the side frame into the engagement holes formed near the left and right sides of the upper apron. The apron is supported so that the left and right inclination can be adjusted. The upper apron is fixed by tightening bolts to brackets provided vertically apart from each other on the inner surfaces of the left and right side frames.

Therefore, in the past, in order to securely fix the upper apron, the bolts were tightened strongly.
The left and right center portions of the upper apron tended to curve rearward using the side frames as fulcrums.

This idea was made in view of the conventional problems mentioned above, and it is possible to install the upper apron in such a way that the horizontal center part of the upper apron does not curve backward, and the verticality of the upper apron can be easily adjusted. It seeks to provide structure.

Examples of this invention will be described below with reference to the drawings. In Figures 1 and 2, the left and right side frames 3, upper apron 5, and lower apron 7
The upper apron 5 is fixed at a mounting portion 9 to the left and right side frames 3 of the press brake 1, which are the main parts of the press brake 1.

More specifically, cylindrical portions 13 whose axes are in the left-right direction are provided at multiple locations on the upper part of the side frame 3, and the cylindrical portion 13 has an opening 11 that opens on the front surface of the side frame 3. It is connected.

A circular nut member 15 having a threaded groove 17 is rotatably mounted on each cylindrical portion 13 .
A stepped circular hole 19 is provided in the upper apron 5 corresponding to the nut member 15, and a stepped circular hole 19 is inserted into the circular hole 19, passes through the opening 11, and is screwed into the thread groove 17 of the nut member 15. Then, through the washer 21,
A tension bolt 25 is provided to tighten the stepped portion 23 of the circular hole 19 to the left in FIG. Further, a circular hole 27 with a threaded groove 29 is provided in the upper apron 5, located in substantially the same vertical plane as the tension bolt 25, and close to the upper side of the tension bolt. 31 are screwed together, and the push bolt 31 is inserted into the nut 35 through the washer 33.
It is fixed to the upper apron 5 by. Between the left end of the push bolt 31 and the frame 3,
A pusher metal 37 is provided.

In the above configuration, when the pull bolt 25 is loosened, the nut 35 is loosened, and the push bolt 31 is tightened,
The upper apron 5 moves to the right in FIG.
Also, if the nut 35 is loosened, the push bolt 31 is loosened, and the tension bolt 25 is tightened, the upper apron 5
moves to the left in FIG. By performing the above operation on the upper and lower mounting parts 9, the distance C between the frame 3 and the upper apron 5 can be adjusted to the required size, and the upper apron 5 can be adjusted in the front-rear direction (in the left-right direction in FIG. 2). The verticality of the upper apron 5 can be adjusted by adjusting the inclination of the upper apron 5.

When the tension bolts 25 are firmly tightened to firmly fix the upper apron 5 to the side frame 3, the tension bolts 25 and the push bolts 31 are located in substantially the same vertical plane, and the upper apron 5 is supported by the side frame 3. Since the upper apron 5 is also located in the same vertical plane, there is no force acting to bend the left-right central portion of the upper apron 5 in the rearward direction, and there is no problem as in the conventional case.

Further, when the pull bolt 25 is tightened, the buckling of the threaded portion between the push bolt 31 and the upper apron 25 is removed, and the upper apron 5 can be securely fixed.

As can be understood from the above description of the embodiments, the gist of the present invention is as stated in the claims for utility model registration, and as is clear from the description, in the present invention, the side frame 3 A cylindrical portion 13 is formed in the left and right direction, and
A pull bolt 25 that acts to press the upper apron 5 toward the front surface of the side frame 3 is screwed into a cylindrical nut member 15 rotatably fitted into the cylindrical portion 13 from the radial direction. Therefore,
For example, when trying to adjust the inclination of the upper apron 5 in the longitudinal direction, the tension bolt 25 can swing in the vertical direction, and no bending moment is applied to the tension bolt 25.

Furthermore, in the present invention, since the push bolts 31 and the pull bolts 25 that act to separate the upper apron 5 from the front surface of the side frame 3 are vertically spaced apart, the central part side of the upper apron 5 is Needless to say, there is no force acting on the push bolts 31 and the upper apron 5.
The buckling at the threaded joint with the upper apron 5 is removed by the tightening action of the pull bolt 25, and the upper apron 5 cannot be displaced unless both the pull bolt 25 and the push bolt 31 are operated. This allows the upper apron 5 to be securely fixed.

[Brief explanation of the drawing]

The attached drawings show examples of this invention.
FIG. 1 is a front view of the press brake, FIG. 2 is a left side view thereof, and FIG. 3 is a sectional view showing the main parts.
The same reference numerals in the figures indicate the same or equivalent items. 3...Side frame, 5...Upper apron,
11...Opening part, 13...Cylindrical part, 15...Nut member, 17...Thread groove, 25...Tension bolt,
31...Push bolt.

Claims (1)

[Scope of utility model registration request] An upper apron 5 is attached to the upper part of the left and right side frames 3, and a lower apron 7 facing the upper apron 5 is provided so as to be vertically movable. Cylindrical portions 13 in the left and right directions formed at multiple locations on the upper portion are provided to communicate with the front surface of the side frame 3 via the opening portion 11, and the upper apron 5 attached to the upper portion of the side frame 3 is connected to the front surface of the side frame 3. Each tension bolt 25 that acts to press is inserted into the cylindrical nut member 15 that is rotatably fitted into each of the cylindrical portions 13 through the opening 1.
1 and is screwed into the upper apron 5 from the radial direction, and the tip thereof is brought into contact with the front surface of the side frame 3, thereby acting to separate the upper apron 5 from the front surface of the side frame 3. A mounting structure for an upper apron in a press machine, characterized in that each push bolt 31 is vertically spaced apart in substantially the same vertical plane as a pull bolt 25.