JP2504549Y2 - Rotary clamp cylinder - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary clamp cylinder which is used for clamping an operating member of various machines and which causes a piston rod to perform a linear motion and a rotary motion.

[0002]

2. Description of the Related Art FIG. 8 shows a conventional rotary clamp cylinder. A piston 72 integral with the piston rod 73 is slidably and rotatably fitted in the cylinder tube 71, and a guide member 75 is fixed to the rod side of the cylinder tube 71 by a lid 74. The piston rod 73 is loosely fitted in the guide member 75, and the engagement pin 76 inserted and fixed in the mounting hole 77 of the piston rod 73 has a guide groove 78 formed in the guide member 75.
Is engaged with. The guide groove 78 has a parallel portion and a spiral portion, and when the piston 72 is driven by air pressure,
When the engaging pin 76 is engaged with the parallel portion of the guide groove 78, the piston rod 73 makes a linear motion, and when the engaging pin 76 is engaged with the spiral portion of the guide groove 78, the piston rod 73 is moved. Performs linear and rotational movements. A bolt hole is formed in the end portion (right end in FIG. 8) of the cylinder tube 71 on the head side, and the cylinder tube 71 is fixed to the fixing member 79 by a bolt. A packing 80 is inserted in an annular groove on the outer circumference of the piston 72. (For example, JP-A-2-71
See Japanese Patent No. 943. )

In the conventional rotary clamp cylinder, when fixing the cylinder tube 71 to the fixing member 79, the bolt hole at the head side end of the cylinder tube 71 and the bolt insertion hole of the fixing member 79 are aligned on the same axis. I am tightening the bolts. However, it is not easy to align the bolt hole and the bolt insertion hole on the same axis and maintain the state, and it takes a considerable time for positioning.
Since the piston rod 73 and the piston 72 are integrally formed and manufactured by a method such as casting, the cost is high. Further, in the conventional rotary clamp cylinder, when the lid body 74 is fastened to the cylinder tube 71 with a bolt, the guide member 75 is fixed by the fastening force, so that when the bolt is loosened, the guide member 75 is removed from the engagement pin 76. There was a risk that it would be rotated by the force of, and the durability was not sufficient.

[0004]

SUMMARY OF THE INVENTION The present invention provides a cylinder tube (body) for a rotary clamp cylinder.
The purpose is to enable quick and reliable positioning and fixing to the fixing member of the machine body to which the
And

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a piston in which a piston is slidably and rotatably fitted in a cylinder tube, and a piston rod is connected to the piston. The rod cover is inserted into the rod side, the tip of the piston rod projects from the rod cover, and the guide pin fixed to the rod cover or the piston rod is engaged with the guide groove formed in the piston rod or the rod cover. In the clamp cylinder, the flap is not
The lunge is fixed, and the flange has a body mounting hole and a knock.
It is configured that a cupping hole is formed.

[0006]

When air is supplied to and discharged from the piston inside the cylinder tube, the piston / piston rod moves linearly, and is constrained by the guide pin and the guide groove to rotate. When mounting the rotary clamp cylinder on the machine body, use the knock pin mounted on the machine body.
Insert the flange dowel pin holes to maintain positioning.
Insert the bolt into the body mounting hole and
Mix in and fix.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary clamp cylinder according to a first embodiment of the present invention will be described with reference to FIGS. A piston 3 is slidably and rotatably fitted inside a cylinder tube (body) 2, and a piston rod 6 is connected to the piston 3. The connection is made by inserting the base end (the right end in FIG. 1 (a) and FIG. 2) of the piston rod 6 from which the small-diameter portion 30 projects into the stepped hole of the piston 3 and inserting the tool into the hole 29 of the small-diameter portion 30. By caulking (eg, rolling caulking) in the state shown in FIG. 1 (a). The rod cover 1 is inserted into the rod side of the cylinder tube 2 (left side in FIG. 1A), the tip of the piston rod 6 projects from the rod cover 1, and the rod nut 1 is fixed to the cylinder tube 2 by the ring nut 8. ing. The hexagon socket set screw 11 for preventing rotation is screwed into the screw hole 43 on the side portion of the cylinder tube 2, and the tip of the set screw 11 is press-fitted into the rotation preventing groove 44 having a triangular cross section of the rod cover 1 so that the rod cover 1 is The cylinder tube 2 is maintained in a non-rotatable state. A guide groove 31 as shown in FIG. 2 is formed on the outer peripheral surface of the piston rod 6, and the guide groove 31 has a parallel portion 32 (for linear movement) and a spiral portion 33 (for linear + rotational movement). There is. The twisting direction of the spiral portion 33 may be opposite to the direction shown in FIG. 2, and in FIG. 1 (a), FIG. 3 and FIG. 4, the guide groove 31 similar to FIG. 2 is simply displayed. ing. (Even in FIGS. 5 to 7 showing other embodiments,
A guide groove 31 similar to that of FIG. 2 is simply shown. The guide pin 5 passes through the insertion hole on the side of the cylinder tube 2 and is screwed into the screw hole 45 on the side of the rod cover 1, and the guide portion at the tip of the guide pin 5 is engaged with the guide groove 31.

A rubber magnet 10 and a piston packing 25 are mounted in two annular grooves on the outer peripheral surface of the piston 3, and the rubber magnet 10 is used when the auto switch 23 detects the piston position. An annular cushioning damper 7 is fixed to the rod-side surface of the piston 3, and a gasket 26 is inserted into an annular groove inside the rod cover 1 to seal the space between the rod cover 1 and the cylinder tube 2. There is. Air intake / exhaust holes 35/36 are formed in the side portions of the cylinder tube 2, and air around the piston 3 is supplied / exhausted through the air intake / exhaust holes 35/36. A bush 4 and a rod packing 27 are sequentially installed from the base end side in each annular groove on the inner peripheral surface of the tip end portion (the left end portion in FIG. 1 (a)) of the rod cover 1, and between the rod cover 1 and the piston rod 6. Is sealed. A coil scraper 24 for spatter resistance is inserted into an annular groove on the inner circumferential surface of the rod packing 27 on the tip side, sandwiched between two scraper pressing plates 9, and fixed by mounting a snap ring 12. Although the coil scraper 24 is conventionally compressed and pushed into the annular groove, it is not necessary to compress or push it here. A bolt hole 34 for mounting an arm 15 (described later) is formed at the tip of the piston rod 6, and a rail 37 for mounting an auto switch is formed on the side surface of the cylinder tube 2.

As shown in FIG. 1 (a) and FIG. 3, a recess 38 for mounting a spigot ring is formed on the end face of the cylinder tube 2 on the base end side. The disk-shaped projection 46 of the rolling 20 projects from the end face of the cylinder tube 2 on the base end side. An insertion hole 47 for inserting the parallel pin 39 is formed in the end portion of the base end side of the cylinder tube 2, and an insertion hole 48 for the parallel pin 39 is formed at an appropriate position of the flange 21 and is attached to the central portion of the flange 21. A hole 42 is formed. When the mounting hole 42 of the flange 21 is fitted into the disk-shaped projection 46 of the spigot ring 20 and the flange 21 is rotated to align the insertion hole 47 and the insertion hole 48 with each other, the insertion hole is inserted.
Insert the parallel pin 39 into the 48 and the insertion hole 47. (in this case,
The parallel pin 39 may be previously attached to the insertion hole 48 of the flange 21 by press fitting or the like, and then the alignment may be performed. ) Thus, the position is determined, and the flange 21 is fixed to the cylinder tube 2 by the bolt 22. Four body mounting holes 41 are formed near the four corners of the flange 21 (two of them are shown in FIG. 4B), and the knock pin holes 40 are provided at predetermined positions of the flange 21.
Is formed. A space is prepared on the cylinder tube 2 side of the body mounting hole 41 (on the left side in Fig. 4 (a)) for inserting and rotating a bolt, and a knock pin is inserted on the cylinder tube 2 side of the knock pin hole 40. Space is provided for insertion. When attaching the rotary clamp cylinder to the machine body, insert the knock pin hole 40 of the flange 21 into the knock pin attached to the machine body to maintain the positioning, insert the bolt into the body mounting hole 41 and screw it into the screw hole of the body. Fix with.

A rotary clamp cylinder according to a second embodiment of the present invention will be described with reference to FIG. Second of the present invention
In the embodiment, the outer side of the guide pin 5 is covered with the cylinder tube 2, and the guide pin 5 cannot be seen from the outside. The rod cover 1 is inserted into the rod side of the cylinder tube 2, and the rod cover 1 is fixed to the cylinder tube 2 by mounting a retaining ring 14 in an annular groove on the inner peripheral surface of the tip of the cylinder tube 2. The other points are the same as in the first embodiment. The rod cover 1 projects from the tip of the cylinder tube 2, and the outer surface of the base end portion (right end portion in FIG. 5) of the rod cover 1 has a diameter A. The portion of the diameter A is an inlay portion, and is precision-machined for fitting and fixing other members, and slightly ahead (usually 2 from the tip of the cylinder tube 2).
~ 3mm tip)) has a step, and the tip of the step is a small-diameter relief portion. The fact that the portion having the diameter A is used as the inlay portion is common to the respective embodiments of the present invention, and the diameter A has a standard size.

In the third embodiment shown in FIG. 6, the tip end portion of the piston rod 6 is notched on both sides to form a flat plate shape, and two metal fitting mounting holes 49 are perpendicular to the flat portion.
Are formed. The other points are the same as in the first embodiment.

A case where the clamp arm 15 is attached to the rotary clamp cylinder of the first embodiment of the present invention will be described with reference to FIG. A screw hole 50 and an insertion hole 51 are formed substantially parallel to each other in the vicinity of both ends of the clamp arm 15. The insertion hole 51 has three parts having different diameters, and the central part has the smallest diameter and one side has the largest diameter. , And the other side has a medium width across flats. The bolt 18 having the spring washer 19 fitted therein is inserted from the maximum diameter portion of the insertion hole 51 by fitting the intermediate two-face width portion of the insertion hole 51 to the outer surface of the tip of the piston rod 6 and inserting the bolt 18 into the piston rod. The clamp arm 15 is fixed to the tip of the piston rod 6 by screwing it into the bolt hole 34 at the tip of the piston rod 6. The clamp bolt 16 is screwed into the screw hole 50, and the hexagon nut 17 prevents the clamp bolt 16 from loosening.

[0013]

According to the present invention, since the flange is fixed to the end face of the cylinder tube on the base end side, and the flange has the body mounting hole and the knock pin hole, when the rotary clamp cylinder is mounted on the machine body, The knock pin hole of the flange is inserted into the knock pin attached to the machine body to maintain the positioning, and the bolt is inserted into the body mounting hole and screwed into the screw hole of the body to quickly and securely attach the rotary clamp cylinder to the machine body. Ru can be positioned and fixed to.

[Brief description of drawings]

FIG. 1 is a view showing a rotary clamp cylinder according to a first embodiment of the present invention, and FIG. 1 (a) is an overall vertical sectional view,
1 (b) is a side view of the left half of the rotary clamp cylinder seen from the tip side, and FIG. 1 (c) is a sectional view of the tip of the rod cover.

FIG. 2 is a front view of a piston rod used in each embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which the spigot ring is attached to the rotary clamp cylinder according to the first embodiment of the present invention.

FIG. 4 is a view showing a state in which a flange is further attached to the rotary clamp cylinder of the first embodiment of the present invention.
FIG. 4A is a sectional view, and FIG. 4B is a side view of the right half viewed from the base end side.

FIG. 5 is a view showing a rotary clamp cylinder according to a second embodiment of the present invention.

FIG. 6 is a view showing a third embodiment of the present invention, and FIG.
Is a top view of the tip of the piston rod, and FIG. 6 (b) is a sectional view showing the tip portion of the rotary clamp cylinder.

FIG. 7 is a view showing a state in which a clamp arm is attached to the rotary clamp cylinder of the first embodiment of the present invention.

FIG. 8 is a diagram showing a conventional example.

[Explanation of symbols]

 1 Rod cover 2 Cylinder tube 3 Piston 5 Guide pin 6 Piston rod 11 Set screw 21 Flange 30 Small diameter part 31 Guide groove 40 Knock pin hole 41 Body mounting hole 43 Screw hole 44 Non-rotating groove

Claims (1)

(57) [Scope of utility model registration request] 1. A piston is slidably and rotatably fitted inside a cylinder tube, a piston rod is connected to the piston, a rod cover is inserted into the rod side of the cylinder tube, and a tip of the piston rod is extended from the rod cover. Of the rotary clamp cylinder in which the guide pin fixed to the rod cover or piston rod is engaged with the guide groove formed in the piston rod or rod cover, the flange is fixed to the end face of the cylinder tube on the proximal end side. The rotary clamp cylinder is characterized in that the flange has a body mounting hole and a knock pin hole.