JPS6125960Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a clamping jig with a stopper, and is mainly used when a plurality of bases having clamping bodies are used side by side in the clamping device proposed in Utility Application No. 58-069733. This invention relates to a clamping jig with a stopper that is used in place of a base having a fixed clamping body to facilitate positioning and clamping of a workpiece.

Conventionally, when a workpiece is clamped and fixed on a table of a machine tool, a vice is usually placed and fixed on the table, and the workpiece is fixed to this vice. However, when clamping thin sheet metal, etc., it is necessary to change the jig each time depending on the thickness of the plate. Therefore, manufacturing the jig was time-consuming, and replacement work was performed manually, which was inefficient.

Therefore, a clamping jig has been proposed in Japanese Utility Model Publication No. 11720/1983.

This clamping jig consists of a block main body that can be placed in the clamping location of a vise consisting of a fixed part and a movable part and has a recess bored in the front, and a block main body that is movably stored in this recess and that is attached to the block main body by a mounting screw. It consists of a movable block attached to the movable block, and an adjustment plate that is inserted between the back wall of the recess and the back of the movable block, and is equal to or thinner than the thickness of the workpiece. It is formed so that it is located forward of the front surface of the

Therefore, especially when holding thin sheet metal, it can be carried out very efficiently.

However, when actually machining with a machine tool, there are times when a vise is used and times when it is not, and the heavy vise must be placed on and off the table each time, making the work difficult and labor-intensive. It was time-consuming.

Therefore, we proposed a clamping device in Utility Application No. 1987-069733. This clamping device has a very simple structure and can easily and reliably clamp and fix a workpiece directly on the table of a machine tool or on a base.

However, the disadvantage of this clamping device is that there is no contact standard for clamping, which is necessary for positioning when cutting multiple small workpieces side by side or for positioning when clamping large workpieces. Therefore, it is not possible to always clamp it in a fixed position. Therefore, although there is no problem when machining a single item, it is not suitable for shortening the installation time by repeatedly attaching and detaching a large number of workpieces at the same position in order to improve work efficiency.
Furthermore, the clamping jig proposed in Japanese Utility Model Publication No. 11720/1983 also had similar drawbacks.

Therefore, in view of the above-mentioned points, this invention was devised to make the clamping device suitable for use when trying to shorten the installation time. A clamping stand of an appropriate length that has two parallel abutting clamping surfaces vertically erected on the top surface of a base that can be installed so that the table surface and the top surface are parallel to each other, forming a roughly convex cross section. A spacer that has two parallel surfaces and has a plate thickness formed by these two surfaces that is thicker than the width from the abutting clamping surface to the end of the base, and a threaded rod and a rod thicker than this threaded rod concentrically. It consists of a plurality of stopper pins that are connected to each other, and the thick rod is screwed to the stopper pins in the lateral direction on the two abutting and clamping surfaces, and when the stopper pins are screwed together, the thick rod is connected to the abutting and clamping surfaces. A plurality of screw holes are screwed at appropriate intervals so that they are perpendicular to each other, and on the two parallel surfaces of the two spacers, at the same intervals as the screw holes,
In addition, a plurality of through holes are formed that are larger than the diameter of the threaded rod and smaller than the thick rod, and a stopper pin is passed through the through holes and screwed into or removed from the screw hole to connect the two spacers. The invention consists in that it is formed so that it can be attached to and detached from the abutting and clamping surfaces.

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

That is, the reference numeral 1 shown in the figure is a clamping stand, and this clamping stand 1 has a base 4 whose upper surface 2 and lower surface 3 are parallel.
Two parallel abutting and clamping surfaces 5 are vertically disposed on the top surface 2 of the holder and have a generally convex cross section, and the length is similar to that of a table 6 of a machine tool such as a milling machine. The length is such that it crosses a plurality of mounting T-shaped grooves 7 provided in the longitudinal direction of the base. At least two or more locking protrusions 8 are arranged on the lower surface 3 of the base 4 in the length direction of the clamping base 1, and the intervals are such that the locking protrusions 8 can be fitted into the T-shaped grooves 7 in which they are respectively attached. Set. By fitting the locking protrusion 8 into the mounting T-shaped groove 7, the abutment clamping surface 5
and the mounting T-shaped groove 7 are perpendicular to each other.
This is to set the relationship between the contact and clamping surfaces 5.
The abutment clamping surface 5 is formed with several parallel narrow grooves in the longitudinal direction of the clamping base 1 to ensure secure clamping, and the height of the base 4 is , the same height as the base 21 in the clamping device described later.
Further, in this clamping stand 1, through-holes 9 for screws are vertically bored at intervals of the mounting T-shaped grooves 7, and a fixture 10 having a T-shaped cross section is formed in the mounting T-shaped grooves 7. By screwing and tightening a fixing bolt 11 passing through a through hole 9 into the screw hole, the clamping table 1 is installed on the table 6 so that its surface and the upper surface 2 of the clamping table 1 are parallel to each other.

On the other hand, a spacer 12 having two parallel abutment surfaces 19 having substantially the same shape as the abutment clamping surface 5 is used.
The thickness of the plate formed on these two surfaces is determined from the abutting clamping surface 5 of the clamping table 1 having a substantially convex cross section to the base plate 4.
Form it slightly thicker than the width to the edge.

Separately from this, a threaded rod and a rod thicker than the threaded rod are concentrically connected, and the connected portion is tapered to form a threaded portion 13, a tapered portion 14, and a contact portion 15 in this order. Then, the stopper pin 16 is formed.

A plurality of these stopper pins 16 are formed, and each of the two abutment clamping surfaces 5 of the clamping base 1 has a plurality of screw holes 17 that are screwed into the threaded portions 13.
For example, it may be threaded so as to be located midway between the through holes 9. Further, through holes 18 are bored in the parallel abutment surface 19 in the spacer 12 at the same intervals as the screw holes 17, and the diameter of the through holes 18 is made smaller than the diameter of the abutment part 15 of the stopper pin 16. It shall be greater than 13. Then, the contact surfaces 19 of the spacer 12 are brought into contact with each of the contact clamping surfaces 5, and the stopper pins 16 are screwed into the screw holes 17 through the through holes 18 and tightened. In this way, one spacer 12 can be fixed to each abutting and clamping surface 5 by the tapered part 14 of the stopper pin 16, and the spacer 12 can be removed by removing the stopper pin 16. This is what is being done.

Further, the screw hole 17 is formed so that when the stopper pin 16 is screwed and tightened into the screw hole 17, the contact portion 15 of the stopper pin 16 is screwed perpendicularly to the abutment clamping surface 5. Then, when the spacer 12 is fixed by the stopper pin 16 as described above, the abutting portion of the stopper pin 16
5 stands perpendicularly to the contact surface 19 of the spacer 12. And this contact part 1
If the workpiece 23 is brought into contact with the workpiece 5, the workpiece 23
This serves as a stopper for positioning.

Next, to explain its use, first of all, as shown in Figures 2 to 5,
It was proposed in the issue that only the base 21 having the clamping body 20 of the clamping device was used for mounting the table 6.
Two units are arranged in each groove 7 so that their clamping surfaces 22 face each other, and these are fixed so that they are lined up in a direction perpendicular to the T-shaped groove 7.

A clamping stand 1 is placed approximately in the middle between the bases 21.
is arranged and fixed in a direction perpendicular to the mounting T-shaped groove 7. Therefore, when placing the workpiece 23 directly on the table 6, the spacer 12 is brought into contact with the abutment clamping surface 5, as shown in FIGS. 2 and 3, and the workpiece 23 is clamped. The spacer 12 is fixed by screwing the stopper pin 16 into the screw hole 17 of the abutment clamping surface 5 which is on the side of the place. Then, the workpiece 23 is placed directly on the table 6, its side surface is brought into contact with the stopper pin 16, and
This workpiece 23 is attached to the contact surface 19 of the spacer 12.
and the clamping surface 22 of the clamping body 20 for clamping.

In addition, when clamping the workpiece 23 while floating it above the table 6, as shown in FIG. It is used only as a positioning stopper. Then, the workpiece 23 is placed on the upper surface 24 of the base 21 and the upper surface of the base 4, and the side surface of the workpiece 23 is brought into contact with the stopper pin 16 as described above.
It is held and clamped by the abutting clamping surface 5 and the clamping surface 22 of the clamping body 20. Also, stopper pin 16
If the workpieces 23 are large enough to fit between the workpieces 23, as shown in FIG. Can be clamped at the same time.

Therefore, in the case of mass production, table 6
Furthermore, the operation of repeatedly mounting and removing a large number of workpieces 23 at the same position can be easily performed by using the clamping device described above in combination without having to attach a stopper each time.

That is, on the top surface 2 of the base 4, which can be installed on the table 6 of a machine tool so that the table 6 surface and the top surface 2 are parallel, two parallel abutment clamping surfaces 5 are both vertically erected. Since the clamping base 1 is formed to have a substantially convex cross section and has an appropriate length, if the base 21 of the clamping device and the base 4 are at the same height, the base 21 and the base 4 will be covered. If the workpiece 23 is placed across the table 6, the workpiece 23 will be placed on the table 6.
can be set in parallel. Since it is formed to have a substantially convex cross section and an appropriate length, it can be used with the base 21 having the clamping body 20 in the clamping device, as shown in the usage example, to easily handle a large number of workpieces. 23 can be held.

The spacer 12 has two parallel surfaces and is thicker than the width from the abutting clamping surface 5 to the end of the base 4, and the threaded rod is thicker than the threaded rod. It consists of a plurality of stopper pins 16 concentrically connected to the rod, and the stopper pin 1
A plurality of screw holes 17 are threaded at appropriate intervals so that the thick rod is perpendicular to the abutment clamping surface 5 when the stopper pin 16 is screwed together with the stopper pin 16. A plurality of through holes 18 are bored in two parallel surfaces of the two spacers 12 at the same intervals as the screw holes 17, and are larger than the diameter of the threaded rod and smaller than the thick rod. 18
The stopper pin 16 is passed through the screw hole 1.
Since the two spacers 12 are formed so that they can be attached and detached from the abutting clamping surface 5 by screwing them into or removing them from the screw holes 7, the stopper pins 16 can be screwed into the screw holes 17 so that they can be attached to a rod thicker than the threaded rod. The part can be used as a positioning stop.
Further, by attaching the spacer 12 to the abutting clamping surface 5, the workpiece 23 can be clamped while being placed directly on the table 6, and by removing the spacer 12, the workpiece 23 can be lifted off the table 6 and clamped. Furthermore, the spacer 12 is attached to the abutting and clamping surface 5.
When installing the spacer 12, the stopper pin 16 can be used to install the spacer 12. At that time, the thick rod portion can be vertically erected on two parallel surfaces of the spacer 12. It is very convenient because it also functions as a stopper for positioning the workpiece 23, and work efficiency can be improved.

As explained above, according to this invention, by using it together with the clamping device proposed in Utility Application No. 58-069733, it can easily perform the role of a stopper and clamp, thereby facilitating mass production processing. It is extremely convenient when clamping a large number of workpieces, and allows for accurate positioning, eliminating machining errors and greatly shortening machining and installation time. Even in the case of large-sized workpieces, the installation standards can be set accurately, so that high-precision machining can be performed repeatedly, which is beneficial in practice.

[Brief description of the drawings]

The drawing shows one embodiment of this invention.
The figure is an exploded perspective view, and Figure 2 is a partially cutaway front view of the machine tool clamped directly on the table.
Figure 3 is a plan view of the same, Figure 4 is a front view of workpieces suspended and clamped on the table of a machine tool, and Figure 5 is a view of many workpieces lined up and clamped on the table of a machine tool. It is a top view of a state. 1...Holding stand, 2...Top surface, 3...Bottom surface, 4...
...Base, 5...Abutment clamping surface, 6...Table, 7
... Mounting T-shaped groove, 8 ... Locking projection, 9 ... Through hole, 10 ... Fixing tool, 11 ... Fixing bolt, 12
... Spacer, 13 ... Threaded portion, 14 ... Tapered portion, 15 ... Contact portion, 16 ... Stopper pin, 17 ... Threaded hole, 18 ... Through hole, 19 ...
Contact surface, 20... clamping body, 21... base, 22...
... clamping surface, 23 ... workpiece, 24 ... upper surface.

Claims (1)

[Scope of utility model registration request] On the top surface of the base, which can be installed on the table of a machine tool so that the table surface and the top surface are parallel, two parallel abutting and clamping surfaces are vertically erected, forming a substantially convex cross section. A clamping stand of an appropriate length,
A spacer that has two parallel surfaces and has a plate thickness formed by these two surfaces that is thicker than the width from the abutting clamping surface to the end of the base, and a threaded rod and a rod thicker than this threaded rod are placed concentrically. It consists of a plurality of connected stopper pins, and the thick rod is screwed with the stopper pin in the lateral direction on the two abutting and clamping surfaces, and the thick rod is perpendicular to the abutting and clamping surfaces when the stopper pins are screwed together. A plurality of screw holes are screwed at appropriate intervals, respectively, and the thick rods are screwed on two parallel surfaces of the two spacers at the same intervals as the screw holes and larger than the diameter of the screw rod. A plurality of smaller through holes are drilled, and a stopper pin is passed through the through holes and screwed into the screw hole, or
A clamping jig with a stopper, characterized in that the two spacers are formed to be detachable from the abutting clamping surface by being removed.