JPH05228764A - Long material fixing device - Google Patents

Abstract

PURPOSE:To provide a fixing tool of a long material which is capable of preventing the deformation of a work due to elastic restoration after the fixing tool is released. CONSTITUTION:A plurality of tightening plates which press a work 4 from the above are provided over a table whereon the work 4 is loaded. A plurality of hydraulic cylinders of which the rods 8 penetrate the table 1 from the lower side are provided, and the lower surface of the work 4 is pressed by rods 8 of the hydraulic cylinders.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for a long material to be cut.

[0002]

2. Description of the Related Art Conventionally, when a long workpiece such as a guide rail installed on the wall of an elevator hoistway is machined by a planing machine, as shown in FIG. The workpiece 4 is placed on the upper surface of the table 1 of the planing machine, and the workpiece 4 is fixed by the plurality of fixtures 17 fixed to the upper portion of the table 1.
Both lower sides of the table are pressed and fixed to the table 1.

This fixture 17 is a strip-shaped fixing plate 21 which is inserted and fixed in a plurality of grooves formed on the upper surface of the table 1.
And, as shown in FIG. 3 (b) showing an enlarged detailed view of the CC cross section of FIG. The attachment plate 3 and the hydraulic cylinder 5 in which the flange portion is loosely fitted to the lower surface of the fixed plate 21 and the upper portion of the rod 6 penetrates the tightening plate 3.

In the fixing device for a long material constructed in this way, the nut 6a is screwed onto the upper end of the rod 6 and the hydraulic cylinder 5 is actuated so that the end of the tightening plate 3 is processed. The workpiece 4 is pressed and fixed to the table 1 by pressing both sides of the lower portion 4a of the workpiece 4. Further, when the manufacturing lot is small, there is also a method of tightening and fixing the nut 6a with a tightening plate 3 and a stud bolt using a spanner.

[0005]

By the way, among the long materials fixed by such a long material fixing device, there is a hot wire like the above-mentioned guide rails installed on the wall surface of the elevator hoistway. In the state of the material processed into a substantially T-shaped cross section by rolling, there is a slight bend or twist, and the lower part 4a
The lower surface of is not flat either. Therefore, table 1 of the planing machine
When placed on the upper surface of the table 1, an irregular gap is generated between the table 1 and the table 1.

However, when the guide rail is fixed to the table 1 by the conventional fixing device for a long material, the above-mentioned gap disappears due to the tightening force of the fixing device and the guide rail comes into close contact with the table 1.
If the fixture is removed after cutting, it will return to its original state due to elasticity, and the flatness of the cutting surface will be lost. Therefore, a method of inserting a spacer into the gap formed between the work piece 4 and the table 1 may be considered, but since the work piece 4 is not bent or twisted uniformly, spaces having different thicknesses are required. However, it takes time for trial and error and cannot be applied to mass-produced products. A straightening machine can be used to increase the straightness, but the accuracy is low and cannot be used for elevator guide rails.

[0007] Therefore, an object of the present invention is to obtain a fixing device for a long material which can easily maintain the accuracy during processing.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a long material fixing device for fixing a long material to be cut on the surface of a table, which is provided on the surface of the table and temporarily fixed to the long material table by pressing. And a plurality of fasteners that penetrate the table from the back side of the table and press and fix the long material to the fasteners.

[0009]

The long material is pressed against the table by the fastener from the other side of the long material while maintaining the shape of the material, and the fixing tool tightens the long material from one side of the long material. It will be pressed against the tool.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a long material fixing device of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a fixing device for a long material of the present invention, FIG. 2 is a view as seen from an arrow A in FIG. 1, and FIG.
FIG. 2A is an enlarged detailed view of the BB cross section of FIG. 1.

1, 2 and 3, a strip-shaped fixing plate 7 having the same outer shape as the fixing plate 21 of FIG. 4 showing the prior art is attached to the upper portion of the table of the planing machine by bolts not shown. It is fixed. The upper surface of the fixed plate 7 and the workpiece 4 shown in FIG.
A fastening plate 3 is placed on the upper surface of the lower portion 4a shown in (a) in the same manner as in the conventional case, and is fixed by the stud bolt 10 shown in FIG.

In the central portion of the fixed plate 21, four through holes 13A are formed at a position below the lower portion 4a of the workpiece 4 as shown in FIGS. 1 and 3 (a). Through hole 13A
O-rings 12 are attached to the upper ends of the
A rod 8 of the hydraulic cylinder 2 having a flange portion loosely fitted to the lower portion of the through hole 13A passes through 13A.

As shown in FIG. 1, two through holes 13B are formed in the center of the table 1 at the same intervals as the through holes 13A, and an O-ring (not shown) is attached to the upper end of each through hole 13B. At the lower part of each through hole 13B, a hydraulic cylinder (not shown) in which a flange portion loosely fits into a counterbore hole (not shown) on the lower surface of the table 1 and a rod (not shown) penetrates the through hole 13B is attached. ..

In the apparatus for fixing a long material constructed as described above, when the workpiece 4 is placed in the center of the table 1 as shown in FIG. 1, first, each stud bolt shown in FIG.
Insert the lock washer and nut into 10 and tighten with the nut until the moment the lock washer is completely compressed. next,
Each hydraulic cylinder 2 is actuated, and the upper end of the rod 8 of each hydraulic cylinder 2 presses both sides of the bottom surface of the workpiece 4 as shown in FIG. In this state, the nut of each stud bolt 10 is retightened. The fixing plate 21 and the through hole 13
The distance between A and 13B and the nominal diameter of the stud bolt 10 are determined according to the sectional shape and length of the workpiece 4.

In the fixing device for a long material constructed as described above, first, the workpiece 4 is temporarily fixed by the tightening plate 3 and the stud bolt 10 to the extent that the workpiece 4 is not deformed. Then, each hydraulic cylinder 2 is firmly fixed to the table 1. As a result,
Since the workpiece 4 can be fixed in a temporarily fixed state, it can be fixed to the table 1 in a bent or twisted state without deforming the bent or twisted workpiece 4, and can be removed from the table after flat cutting. Even after this, the deformation due to the elastic recovery can be prevented, and the accuracy of the flatness of the cut surface can be maintained in the state during processing.

In the above embodiment, the workpiece 4 is the guide rail installed on the wall of the elevator hoistway, but the sectional shape is not a mountain shape but a groove shape, an L shape or an H shape. But it can be applied. Further, it is not limited to a rolled product, and can be similarly applied to an extruded material of aluminum, for example. Further, in the above embodiment, the case of fixing to the table of the cutting machine has been described, but the present invention can be applied to centering of scribes in the preceding stage of cutting.

[0017]

As described above, according to the present invention, in the long material fixing device for fixing the long material to be cut on the surface of the table, the other side of the long material provided on the surface of the table is attached to the table. By providing a plurality of fasteners for temporary pressing and a plurality of fasteners that penetrate the table from the back surface of the table and press and fix the long material to the fasteners, the shape of the material is maintained. Deformation due to elastic recovery after cutting by pressing the long material against the table from the front side of the long material with a fastener and pressing this long material from the back side of the long material with a fixture Since the problem is solved, it is possible to obtain a long material fixing device that can easily maintain the accuracy during processing.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a long material fixing device of the present invention.

FIG. 2 is a view on arrow A in FIG.

FIG. 3A is an enlarged detailed view of a B-B cross section of FIG. 1.
FIG. 6B is an enlarged detailed view of the CC cross section of FIG. 4.

FIG. 4 is a perspective view showing an example of a conventional fixing device for a long material.

[Explanation of symbols]

1 ... table, 2 ... hydraulic cylinder as fixture, 3 ...
Clamping plate as a fastener, 4 ... Workpiece as a long material,
5 ... Hydraulic cylinder, 7 ... Fixed plate.

Claims (1)

[Claims] 1. A long material fixing device for fixing a long material to be cut on a surface of a table, wherein a plurality of tightening members provided on the surface of the table for temporarily fixing the long material to the table. An apparatus for fixing a long material, comprising: a fitting and a plurality of fixing tools that penetrate the table from the back surface of the table and press and fix the long material to the fastening tool.