JPH0527222Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a clamping device, and more specifically, it positions a plate-shaped workpiece through a hole defined in the workpiece. The clamp device is provided with a main body portion including a cylindrical positioning member having different diameters and a clamp member protruding outward from the positioning member to fix the workpiece, and the main body portion The clamping device is configured so that it can be raised and lowered so that even if the size of the hole formed in the workpiece differs, the clamping device itself can handle it, thereby making it possible to efficiently perform various machining operations on the workpiece. This invention relates to a clamping device that enables this.

[Background of the Idea] Conventionally, for example, when press working is performed on a plate-shaped work, a clamp device is used to accurately position the work with respect to a press working device or the like. In this case, the clamping device includes a positioning member that fits into a hole defined in the workpiece to position the workpiece, and a clamping member that fixes the workpiece, and the positioning member and the clamping member are connected to each other. Generally, they are arranged separately.

Therefore, the structure of the clamp device constructed as described above is considerably complicated, and the manufacturing cost of the clamp device itself increases.

Therefore, in order to solve the above-mentioned inconvenience, the present applicant devised a "positioning clamp device for a plate-like member" disclosed in Japanese Utility Model Publication No. 56-34873. That is, according to this device, a locating pin and a receiving surface are provided in a cylindrical clamp body that houses a piston, and a clamp claw that swings under the driving action of the piston is provided within the locating pin. .

In the clamping device configured in this way, the positioning pin is inserted into the hole of the workpiece, and the clamp claw can be projected outward under the action of the piston to clamp the workpiece on the receiving surface. This makes it possible to simplify the structure.

[Purpose of the invention] The present invention has been made in order to further improve the clamping device, and when positioning and fixing a plate-shaped workpiece, the clamp body, which houses the piston, has cylinders with different outer diameters. A positioning member having a shape is provided, and a plurality of swingable clamp members are provided inside the positioning member, the workpiece is positioned on the outer circumference of the positioning member, and the corresponding clamp member is positioned under the driving action of the piston. The plurality of clamps are configured to protrude outward from the member and fix the workpiece, so that even if the size of the positioning hole provided in each workpiece is different, a plurality of clamps corresponding to the workpieces can be fixed. It is an object of the present invention to provide a clamping device that enables efficient positioning and fixing of various workpieces with a single device without preparing a device.

[Means for Achieving the Object] In order to achieve the above object, the present invention provides a clamp body for positioning and fixing two or more types of plate-like workpieces each having holes of different sizes defined therein; means for displacing the clamp body toward the plate-shaped work, the clamp body having an outer diameter that can be fitted into each hole of the two or more types of plate-shaped works, and having coaxial two or more positioning parts provided on the two or more positioning parts, two or more seats that can be freely engaged with the respective plate-like works arranged on the two or more positioning parts, and each of the two or more seats formed on the two or more positioning parts. a plurality of variable clamp members that are housed in the slit, protrude outward from the slit, and are capable of clamping and fixing respective plate-like works to the two or more seats; It is characterized by having the following.

[Embodiments] Next, preferred embodiments of the clamp device according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, reference numeral 10 indicates a clamping device according to the present invention, and the clamping device 10 includes a base 12 in the form of a housing. In this case, a plate 14 is fixed to the upper surface of the base 12, and this plate 14 has bulges 14a, 14b, and cylindrical guide members 16a, 16b are provided in the bulges 14a, 14b. will be erected respectively. Guide rods, which will be described later, are slidably fitted into the guide members 16a and 16b.

Next, a first cylinder 18 is mounted approximately at the center of the plate 14, and the first cylinder 18 has a cylinder rod 20 that is displaced in the directions of arrows A and B under the driving action of a piston (not shown). As can be easily understood from FIG. 2, one end of the cylinder rod 20 protrudes from the lower surface of the first cylinder 18, passes through a hole in the base 12, and faces into the base 12. On the other hand, the cylinder rod 2
The other end of the cylinder 0 protrudes upward from the first cylinder 18 and engages with the connecting member 22 .
A cylinder rod 26 of a second cylinder 24 disposed above the first cylinder 18 engages with the connecting member 22 . Therefore, the second cylinder 24 is movable via the cylinder rod 20 in the directions of arrows A and B under the driving action of the first cylinder 18, and the cylinder rod 20 of the first cylinder 18 can be moved in the direction of arrow A or arrow B. By driving the second cylinder 24 in a state in which the second cylinder 24 is displaced, it is possible to displace the cylinder rod 26 of the second cylinder 24 in the direction of the arrow A or B.

A stay 28 is fixed to the end surface of the second cylinder 24. Guide rods 30a and 30b extend downward at both ends of the stay 28.
The guide rods 30a and 30b are slidably fitted into the aforementioned guide members 16a and 16b, respectively, and their distal ends can be inserted into the base 12 (see FIG. 1). An angle member 32 is integrally attached to the side surface of the stay 28, and a clamp body 34 is placed and fixed on this angle member 32.

The clamp body 34 includes a bottom plate 36 that engages the angle member 32, as shown in FIGS. 3 and 4. The bottom plate 36 includes a rectangular attachment portion 38 and a columnar engagement portion 40 that slightly projects upward from the attachment portion 38, and a recess 42 is defined in the engagement portion 40. . Further, a first port 44 for introducing and deriving a pressure fluid, for example, compressed air, is defined on one side of the mounting portion 38, and the first port 44 is connected to a passageway 46 having a bent shape. It communicates with the recess 42 .

Next, a cylindrical body 48 is attached to the engaging portion 40 of the bottom plate 36.
One end of the cylindrical body 48 is engaged, and a rod guide 50 is attached to the other end of the cylindrical body 48. Therefore, a chamber 52 is defined by the bottom plate 36, the cylindrical body 48, and the rod guide 50. A second port 54 for introducing and discharging compressed air is defined on one side of the rod guide 50, and the second port 54 communicates with the chamber 52 through an inclined passage 56. The bottom plate 36 and the rod guide 50 are connected by a plurality of rod members 57a to 57d to increase their strength.

A piston 58 is disposed within the chamber 52 and slidably abuts on the inner circumferential surface of the cylindrical body 48, and a piston rod 60 extends approximately in the center of the piston 58 in the direction of arrow A. are concatenated.
The tip of the piston rod 60 passes through a hole 50a formed in the approximate center of the rod guide 50 and projects outward from the rod guide 50, and a first clamp arm, which will be described later, is engaged with the end of the piston rod 60. A notch 60a is defined for this purpose.

Therefore, when compressed air is introduced into the chamber 52 from the first port 44 through the passage 46 and the recess 42, the piston rod 60 is displaced in the direction of arrow A;
It is easily understood that when compressed air is introduced into the interior, the displacement occurs in the direction of arrow B.

A positioning member 62 is attached to the upper surface of the rod guide 50, and this positioning member 62 is formed coaxially with a first positioning part 64 formed on the distal end side and is connected to the first positioning part 64.
and a second positioning portion 66 having a larger diameter. That is, the positioning member 62 is connected to the rod guide 50.
It has a columnar part 68 attached to the columnar part 68.
The second positioning part 66 is formed to protrude from a substantially central part of the second positioning part 66, and the first positioning part 64 is formed to protrude from a substantially central part of the second positioning part 66.
In this case, the distal ends of the first positioning part 64 and the second positioning part 66 are respectively oriented upward through the stepped part and have a tapered shape whose diameter is slightly reduced.
A first seat 70 has a hole on the upper surface of the second positioning part 66 that engages with the first positioning part 64.
is formed. Similarly, a second seat 72 having a hole that engages with the second positioning portion 66 is formed on the upper surface side of the columnar portion 68 . A workpiece W comes into contact with the first catch seat 70 and the second catch seat 72, respectively.

The positioning member 62 configured in this way includes
As can be easily understood from FIG.
A slit 74 whose width is narrowed from the side toward the first positioning portion 64 through a plurality of steps.
a, 74b and 74c are formed. A first clamp arm (variable clamp member) 76 is disposed within the slits 74a to 74c. The first clamp arm 76 substantially fits into a notch 60a formed at the tip of the piston rod 60, and is rotatably supported by the piston rod 60 via a pin member 78.

A guide hole 76a having a bent shape is defined in the intermediate portion of the first clamp arm 76, and further, a tip portion of the first clamp arm 76 is bent downward to form a clamp claw 76b. (See Figure 5).

Next, a substantially triangular second clamp arm (variable clamp member) is attached to the first clamp arm 76.
82. That is, the second clamp arm 82 includes an engaging portion 84a and a clamp claw 84b that projects from the engaging portion 84a. The engaging portion 84a has a guide hole 8 having a bent shape.
6 is defined, and a notch 88 is formed on the side surface of the engaging portion 84a. A pin member (engaging pin) 90 engages the first clamp arm 76 and the second clamp arm 82 through the notch 88 and penetrates the first clamp arm 76 and the second clamp arm 82. Accordingly, the second clamp arm 82 is swingably supported by the first clamp arm 76.

In this case, the guide hole 76a of the first clamp arm 76 and the guide hole 8 of the second clamp arm 82
6 is configured to be engaged with a pin member (fixing pin) 91. Therefore, the first clamp arm 76 and the second clamp arm 82 are pulled under the action of displacement of the piston rod 60 in the direction of arrow B, and the guide holes 76a, 86 formed therein are pulled.
It will be easily understood that the first clamp arm 76 and the second clamp arm 82 are guided by the pin member 91 and swing outward about the pin members 78 and 90, respectively.

These clamp claws 76b, 84b are provided with slits 74c, 74 under the swinging motion of the first clamp arm 76 and the second clamp arm 82.
b protrudes outward and is configured to be able to abut on the first catch seat 70 and the second catch seat 72, respectively.

In the figure, reference numeral 92 indicates a seal member, and this seal member 92 prevents leakage of compressed air for driving the cylinder.

The clamp device according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

First, the positioning member 62 constituting the clamp device 10 is fitted into a hole defined in the workpiece W.
In this case, one of the first positioning parts 64 and the second positioning parts 66, for example, the first positioning part 64, is selected depending on the size of the hole defined in the workpiece W. and insert it into the hole. That is, either one of the first cylinder 18 and the second cylinder 24 is driven to displace the second cylinder 24 by a predetermined amount in the direction of arrow A. At this time, when the first cylinder 18 is driven, the cylinder rod 20 is displaced in the direction of the arrow A under the driving action, and the cylinder rod 26 of the second cylinder 24 that engages therewith and the main body of the second cylinder 24 are moved in the direction of the arrow A. Displaced to. Also, the second
When the cylinder 24 is driven, the second cylinder 2
4 as described above under the driving action of the second cylinder 2
4 main body will be displaced in the direction of arrow A.

In this way, the second cylinder 24 is
When the clamp body 34 is displaced by a predetermined amount in the direction, the clamp body 34 is displaced in the direction of arrow A via the stay 28 and the angle member 32 attached thereto. As a result, the first positioning portion 64 constituting the positioning member 62 of the clamp body 34 fits into the hole of the workpiece W, and the first seat 70 comes into contact with the lower surface of the workpiece W. In this case, the first clamp arm 76 and the second clamp arm 82 are moved back into the positioning member 62 in advance.

That is, compressed air is supplied from the first port 44 of the bottom plate 36 constituting the clamp body 34,
This compressed air is passed through the passage 46 and the recess 42 to the chamber 5.
2 to displace the piston 58 and piston rod 60 disposed within the chamber 52 in the direction of arrow A. As a result, the piston rod 60
The first clamp arm 76 and the second clamp arm 82 that are engaged with each other are displaced in the direction of arrow A. At this time, the first clamp arm 76 and the second clamp arm 82 are retracted into the slits 74c and 74b under the cooperation of the guide holes 76a, 86 and the pin member 91. Therefore, the first positioning portion 64 is located in the hole of the workpiece W.
It becomes possible to fit the

Therefore, the rod guide 50 of the clamp body 34
Compressed air is supplied from a second port 54 defined in the chamber 52 and introduced into the chamber 52 through a passageway 56 . As a result, the piston 58 and piston rod 60 disposed within the chamber 52 are displaced in the direction of arrow B by the pressure of the compressed air. Under the action of this displacement of the piston rod 60, the first clamp arm 76 and the second clamp arm 82 are displaced in the direction of arrow B, contrary to the above. At that time, the first clamp arm 76 and the second clamp arm 82 are guided by the guide holes 76a, 86 and the pin member 91 that engages with the guide holes 76a, 86, and the first positioning part 64 and the second positioning part 66
It will be displaced outward and downward. This first
Clamp arm 76 and second clamp arm 8
2, the clamp claws 76b and 8
4b protrudes outward from the slits 74c, 74b and is displaced in the direction of contacting the first seat 70 and the second seat 72, respectively. As a result, the workpiece W in contact with the first catch 70 is moved between the first catch 70 and the clamp claw 7 of the protruding first clamp arm 76.
6b, and the workpiece W is positioned and fixed.

Workpiece W positioned and fixed as above
is subjected to a predetermined operation, such as press processing, and then transported to the next processing device. Note that when the hole defined in the workpiece W has a larger diameter, the second positioning part 66 is fitted into the hole and the second positioning part 66 is positioned after the workpiece W is positioned.
The desired work can be performed by holding this between the clamp claw 84b of the second clamp arm 82 and the clamp claw 84b of the second clamp arm 82.

Of course, when fitting the second positioning part 66 into the hole of the workpiece W, it is sufficient to drive the first cylinder 18 and the second cylinder 24 to further displace the clamp body 34 in the direction of arrow A. It is.

In this way, according to this embodiment, even if the sizes of the positioning holes formed in the plurality of workpieces W are different, these workpieces W can be accurately fixed. . That is, from among the first positioning part 64 and the second positioning part 66 that constitute the positioning member 62, one of the positioning parts corresponding to the hole defined in the workpiece W is selected and placed in the hole. It is possible to fit.
That is, the displacement amount of the positioning member 62 is
The selection can be made by driving and controlling the cylinder 18 and the second cylinder 24. Moreover, the workpiece W positioned by the first positioning part 64 or the second positioning part 66 can be moved to the first clamp arm by simply displacing the piston rod 60 in the direction of arrow B under the driving action of the piston 58 installed in the clamp body 34. 76 clamp claw 7
6b and the first seat 70, or the clamp claw 84b of the second clamp arm 82 and the second seat 72, it can be clamped and fixed. Therefore, even if the sizes of the positioning holes defined in the workpieces W are different, the workpieces W can be positioned and fixed by the clamping device 10 alone.

[Effects of the invention] As described above, according to the invention, when positioning and fixing a plate-shaped workpiece through the hole defined therein, the positioning hole portions each have a different diameter. A clamp body of a clamping device is provided with a plurality of positioning parts corresponding to the workpieces and clamp arms that are housed inside each of these positioning parts and can protrude outward. Furthermore, the clamp device is provided with means for displacing the clamp body itself so that any positioning section selected from the plurality of positioning sections can be engaged with the workpiece. Therefore, even if the workpieces have positioning holes of different sizes, they can be accurately positioned and fixed. As a result, there is no need to replace the positioning member or clamping member for each workpiece as in the past, and as a result, the time spent on positioning and fixing the workpiece can be reduced as much as possible. The advantage is that the efficiency of various processing operations can be further improved.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and design changes can be made without departing from the gist of the present invention. Of course.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of the clamp device according to the present invention, Fig. 2 is a partially omitted side view of the clamp device according to the present invention, and Figs. 3 and 4 are clamps constituting the clamp device according to the present invention. FIG. 5 is a partially omitted exploded perspective view of the main parts of the clamp body shown in FIGS. 3 and 4. FIG. 10... Clamp device, 12... Base, 1
8, 24...Cylinder, 34...Clamp body,
58... Piston, 60... Piston rod, 6
4, 66... Positioning member, 70, 72... Seat, 76, 82... Clamp arm.

Claims (1)

[Claims for Utility Model Registration] (1) A clamp body for positioning and fixing two or more types of plate-shaped workpieces, each having holes of different sizes, and a clamp body for positioning and fixing two or more plate-shaped workpieces, each of which has holes defined therein, the clamp body being directed toward the plate-shaped workpieces. and means for changing the clamp body, the clamp body having two or more positioning parts coaxially provided and having outer diameters that can fit into the respective holes of the two or more types of plate-shaped works. , two or more seats that are disposed in the two or more positioning parts and can be freely engaged with the respective plate-shaped works; A clamp device comprising: a plurality of variable clamp members capable of clamping and fixing respective plate-shaped works protruding outwardly from the at least one of the two or more receiving seats and arranged at the two or more positioning portions. (2) Utility model registration In the device according to claim 1, the plurality of variable clamp members have a flat shape and are accommodated in each of the slits, and the plurality of variable clamp members include: A clamping device characterized in that driving means are provided for causing the plurality of variable clamp members to integrally project outwardly from the slit under the action of a single cylinder. (3) Utility model registration In the device according to claim 2, the drive means swings one variable clamp member and another variable clamp member connected to a rod extending from the single cylinder relative to each other. an engagement pin that is freely engaged; a guide hole having a bent shape formed in the plurality of variable clamp members; and a guide hole that is inserted into the guide hole and operates the plurality of variable clamp members under the action of the single cylinder. A clamp device comprising: a fixing pin for integrally swinging;