JP4613902B2 - Fluid pressure cylinder with trunnion support bracket - Google Patents

Description

  The present invention relates to a fluid pressure cylinder with a trunnion support bracket that is attached to various industrial facilities and used for processing or transporting products. More specifically, the present invention can swing to a predetermined position via the trunnion support bracket. The present invention relates to a fluid pressure cylinder with a trunnion support fitting for installation.

  2. Description of the Related Art Conventionally, in various industrial facilities, a fluid pressure cylinder for processing or transporting a product is used by being swingably installed at a predetermined position via a trunnion support fitting. As shown in FIGS. 9 and 10, a fluid pressure cylinder 101 having such a trunnion support fitting 100 has a pair of trunnion support fittings having a support shaft 103 on the outer surface of a cylinder tube 102 having a rectangular cross-sectional shape. 100 is fixed by means such as screwing, and the support shaft 103 is swingably supported by a bearing member 104 (see, for example, Patent Document 1).

JP-A-62-72905

  In such a fluid pressure cylinder 101, work such as product welding and conveyance is performed while repeating a swinging motion around the support shaft 103. Therefore, the fluid pressure cylinder 101 and the trunnion support fitting 100 are caused to vibrate due to vibration. It is easy to be displaced relative to the direction. For this reason, the trunnion support fitting 100 needs to be firmly fixed to the cylinder tube 102.

  However, in general, such a cylinder tube 102 is often formed of aluminum which is a nonmagnetic metal because a magnetic position sensor for detecting an operating position of a piston is attached. Therefore, when the trunnion support fitting 100 is firmly tightened and fixed with a screw or the like, the cylinder tube 102 is distorted or deformed at a portion where the screw or a locking projection hits, and the operation of the fluid pressure cylinder 101 is performed. May be adversely affected.

  The present invention has been made in consideration of the above-mentioned problems, and is capable of securely fixing the trunnion support bracket while suppressing deformation of the cylinder tube when the trunnion support bracket is mounted. It is an object of the present invention to provide a fluid pressure cylinder.

In order to achieve the above object, the present invention provides a fluid pressure cylinder for displacing a piston provided in a cylinder tube under the action of supplying a pressure fluid, and the fluid pressure cylinder is swingably supported by a bearing member. A trunnion support fitting for causing a fluid pressure cylinder with a trunnion support fitting provided on the outer surface of the cylinder tube,
The trunnion support fitting is formed in a substantially concave shape in cross section, is mounted along the longitudinal outer surface of the cylinder tube, and both end portions are outside the flanges formed on the lateral outer surface of the cylinder tube. A set of main metal fittings arranged in
A set of fasteners provided at both ends of the main metal fitting and disposed so as to be inside the flange;
A screw for connecting the main metal fitting and the fastener;
With
The main metal fitting and the holding metal fitting are arranged to face each other with the flange portion interposed therebetween, and the flange portion is sandwiched under the tightening action of the screw, and the flange portion is formed in a substantially rectangular cross section. One set is provided on each of the two vertical outer surfaces of the tube and the other two opposite lateral outer surfaces, and is formed so as to protrude from the vertical outer surface and the lateral outer surface, and the displacement position of the piston can be detected. It is provided in the position which becomes an outer side with respect to the attachment groove | channel of the said cylinder tube in which a detection sensor is mounted | worn.

  According to the present invention, the trunnion support bracket includes a pair of main metal fittings whose both end portions are disposed outside the flange portion formed on the laterally outer surface of the cylinder tube, and both ends of the main metal fitting. And a set of fasteners disposed on the inner side of the flange portion, and the main bracket and the fasteners are connected via screws. Therefore, the main metal fitting and the metal fitting arranged so as to face each other with the flange interposed therebetween clamp the flange by tightening the screw, and the trunnion support bracket is securely and stably fixed to the cylinder tube. can do. Further, at this time, since the screw tightening force is applied only to the flange portion via the main metal fitting and the stopper metal, the cylinder tube is prevented from being distorted or deformed.

  Still further, a pair of flanges is provided on each of the longitudinal outer surface of the cylinder tube having a substantially rectangular cross section and the other opposite lateral outer surface so as to protrude from the longitudinal outer surface and the lateral outer surface. It is good to form.

  Moreover, it is good to provide a collar part in the position which becomes an outer side with respect to the attachment groove | channel of the cylinder tube in which the detection sensor which can detect the displacement position of a piston is mounted | worn.

  According to the present invention, the following effects can be obtained.

That is, the door Lannion support bracket, a main metal fitting lateral outer surfaces to disposed outside of the formed flange portion cross section concave shape of the both end portions cylinder tube, provided at both ends of the main metal fitting the The cylinder tube comprises a set of fasteners disposed on the inner side of the collar portion, and the main bracket and the fasteners disposed so as to face each other with the collar portion interposed therebetween are coupled by tightening screws. The trunnion support bracket is securely and stably fixed to the flange portion of the cylinder tube without causing distortion, deformation, or the like.

  A preferred embodiment of a fluid pressure cylinder with a trunnion support fitting according to the present invention will be described in detail below with reference to the accompanying drawings.

  1 to 5 show a fluid pressure cylinder with a trunnion support fitting according to a first embodiment of the present invention, in which reference numeral 1 indicates a fluid pressure cylinder, and reference numeral 2 indicates A trunnion support fitting attached to the fluid pressure cylinder 1 is shown.

  A pair of trunnion support fittings 2 are attached to opposite positions on the outer surface of the fluid pressure cylinder 1 so as to face each other. Each trunnion support fitting 2 has a support shaft 3, and these support shafts 3 are arranged concentrically. As in the conventional example shown in FIG. 10, the bearing member 4 (see FIG. 2) in various industrial facilities is swingably supported. The two trunnion support fittings 2 and 2 have the same configuration.

  On the other hand, the fluid pressure cylinder 1 has a cylinder tube 7 made of a nonmagnetic metal such as aluminum and having a substantially rectangular cross section. The cylinder bore 7 extends in the direction of the axis L of the cylinder tube 7. 8 is formed, and a piston 9 is slidably disposed inside the cylinder bore 8. Both ends of the cylinder bore 8 are closed by a head cover 11 and a rod cover 12, and a piston rod 10 extending from the piston 9 in the direction of the axis L extends through the rod cover 12 to the outside.

  Further, pressure chambers (not shown) are formed between the piston 9 and the head cover 11 and between the piston 9 and the rod cover 12, respectively, and these pressure chambers are two ports 13 a on the outer surface of the cylinder tube 7. , 13b, respectively. Then, when a pressure fluid such as air is supplied to the head side pressure chamber through the head side port 13a from the state of FIG. 1, the piston 9 moves (advances) to the rod cover 12 side and the piston rod 10 extends. On the other hand, when pressure fluid is supplied from the rod-side port 13b to the rod-side pressure chamber, the piston 9 moves (retreats) toward the head cover 11 and the piston rod 10 is shortened.

  The rectangular outer peripheral surface of the cylinder tube 7 is composed of two parallel vertical outer surfaces 15a and 15a facing each other and two other parallel lateral outer surfaces 15b and 15b facing each other, and these vertical outer surfaces 15a. 15a and the laterally outer surfaces 15b, 15b are formed with two locking grooves 17 extending in the direction of the axis L of the cylinder tube 7, respectively. In the following description, unless the vertical outer surface 15a and the horizontal outer surface 15b are displayed separately, they are displayed with a common code “15”.

  The two locking grooves 17 on each outer surface 15 are formed at symmetrical positions with respect to the center of the outer surface 15 in the width direction, and are for attaching a position sensor (not shown) for detecting the operating position of the piston 9. Also serves as a mounting groove. In other words, the mounting groove for the position sensor is also used as the locking groove 17.

  The groove wall of the locking groove 17 includes a flat bottom wall 17a (see FIG. 4) parallel to the outer surface 15, and left and right side walls extending while inclining outwardly from the bottom wall 17a toward the outer surface 15 side. Convex wall portions 17c that protrude toward the inside of the locking groove 17 are formed at the end portions of the side walls 17b and 17b near the outer surface 15 so as to face each other. An inner end surface 17 d of the convex wall portion 17 c is a surface orthogonal to the outer surface 15. The distance between the left and right convex wall portions 17c, 17c (groove width) is the same as or slightly wider than the width of the bottom wall 17a (groove bottom width).

  The trunnion support fitting 2 has a substantially concave shape in cross section as a whole. The trunnion support fitting 2 has a metal main fitting 21 in contact with one longitudinal outer surface 15a of the cylinder tube 7 and the lateral direction from both ends of the main fitting 21, respectively. It consists of two metal fasteners 22 extending along the outer surfaces 15b, 15b and extending to a position crossing one locking groove 17 formed in the laterally outer surfaces 15b, 15b. The front end of the stopper metal 22 is disposed so as to be in front of the lateral outer surface 15b without reaching the center. The main metal fitting 21 and the two metal fittings 22 and 22 are formed separately and are connected to each other by screws 23 as will be described later.

  The main metal fitting 21 crosses the vertical outer surface 15a in the width direction, and both ends thereof protrude on both sides of the vertical outer surface 15a, and locking grooves are formed along the horizontal outer surfaces 15b and 15b at both ends. The connecting arms 25 and 25 extending to a position before 17 are formed. The horizontal width W (see FIG. 2) of the main metal fitting 21 is formed sufficiently smaller than the length of the cylinder tube 7 in the axis L direction. Still, the mounting position of the main metal fitting 21 can be adjusted in the direction of the axis L.

Further, the support shaft 3 extends in the direction perpendicular to the axis L of the cylinder tube 7 at the center position on the outer surface of the main metal fitting 21, and the main metal fitting 21 has an inner surface on the inner surface thereof. Two positioning protrusions 26 and 26 extending in parallel so as to be substantially orthogonal to the longitudinal direction of the main metal fitting 21 are formed so as to be symmetric with respect to the center of the main metal fitting 21. The positioning projection 26 has a projection width that is narrower than the opening width of the locking groove 17, and the left and right side walls 26 a, 26 b form inclined walls that gradually incline in a tapered shape. The inclination angles of the left and right side walls 26 a and 26 b are different from each other, and the steeply inclined side wall 26 a located outside the center of the main metal fitting 21 is a convex wall portion of one side wall 17 b in the locking groove 17. 17c, i.e., the vertical Kogaimen 15 abut shaped uneven contact in respect projecting wall portion 17c of the outer side wall 17b located on a side, is engaged.

  Thereby, the trunnion support fitting 2 is positioned at the center of the vertical outer surface 15a. At this time, on the inner surface of the main metal fitting 21, the surface portions 21a, 21a outside the two positioning projections 26, 26 are in contact with the vertical outer surface 15a.

  A connecting surface 25a for connecting the stopper fitting 22 is formed at the distal end of the arm portion 25, and two parallel lines extending from the outer surface of the main fitting 21 to the connecting surface 25a are formed inside the arm portion 25. Screw mounting holes 28, 28 are formed. Then, the base end portion 22a of the stopper fitting 22 is brought into contact with the connecting surface 25a, and the screw 23 inserted through the screw mounting hole 28 is screwed into the screw hole 29 of the stopper fitting 22, whereby the stopper fitting is fixed. 22 is connected and fixed to the main metal fitting 21. In this case, it is desirable to form a positioning convex portion 25b and a concave portion 22b which are engaged with each other on the connecting surface 25a of the arm portion 25 and the base end portion 22a of the stopper member 22.

  A mounting protrusion 30 extending along the locking groove 17 straddled by the stopper 22 is formed on the inner side surface of the stopper 22 that contacts the laterally outer surface 15b over the entire width of the stopper 22. . The mounting projection 30 has a projection width that is narrower than the groove width of the locking groove 17 and a projection height that reaches the bottom wall 17a. The left and right side walls 30a, 30b of the mounting projection 30 are provided. Of these, a protruding portion 30c is provided on a part of the side wall 30a on the main metal fitting 21 side. And this overhang | projection part 30c is latched by contact | abutting to the convex wall part 17c of one side wall 17b in the said latching groove | channel 17 in the shape of a piece, and this projection 30 for attachment to the latching groove | channel 17 is carried out. The trunnion support fitting 2 is attached to the outer surface of the cylinder tube 7 by locking. At this time, the locking force of the mounting projection 30 can be adjusted by tightening the screw 23. By loosening the screw 23, the trunnion support fitting 2 is moved along the locking groove 17 to The mounting position can be changed.

  When the trunnion support fitting 2 is attached to the cylinder tube 7, the tip end surface 30 d of the attachment projection 30 abuts against the bottom wall 17 a of the locking groove 17, A surface portion 22c outside the mounting projection 30 is in contact with the laterally outer surface 15b.

  In addition, a particle layer 32 is formed on the trunnion support fitting 2 in order to increase friction between the trunnion support fitting 2 and the cylinder tube 7 in contact with the cylinder tube 7. In the first embodiment, a surface portion 21 a that contacts the longitudinal outer surface 15 a of the inner surface of the main metal fitting 21, a surface portion 22 c that contacts the lateral outer surface 15 b of the inner surface of the stopper metal 22, and the locking groove 17. The particles on the tip surface 30d of the mounting projection 30 that contacts the bottom wall 17a and the surface of the protruding portion 30c of the side wall 30a of the mounting projection 30 that contacts the convex wall portion 17c of the locking groove 17 respectively. Layer 32 is formed.

  The particle layer 32 can be obtained by depositing (sand coating) hard particles such as diamond abrasive grains or silicon carbide particles on the above-described portions by a method such as electrodeposition or adhesion. The particle size of each particle used at this time is, for example, preferably about F100 to F180, and particularly preferably about F150, but other particle sizes may be used.

  Further, when an adhesive is used for fixing the particles, it is desirable to use a low-curing adhesive. The reason for this is that the low-curing adhesive is crushed when sandwiched between substances, so that the particles easily float on the surface of the adhesive layer.

  Thus, since the friction with respect to the cylinder tube 7 is increased by forming the particle layer 32 on the trunnion support fitting 2, the trunnion support fitting 2 can be obtained without tightening the trunnion support fitting 2 so strongly with the screw 23. 2 is fixed to the cylinder tube 7 with a large locking force (frictional force).

  Therefore, the mounting state of the trunnion support fitting 2 is stable, and the position shift is not caused by the vibration accompanying the swinging operation of the fluid pressure cylinder 1. Further, since it is not necessary to strongly tighten the screw 23 so that the mounting projection 30 of the stopper metal 22 is brought into strong contact with the locking groove 17 of the cylinder tube 7 to be locked, the cylinder tube 7 is made of aluminum. Even if the cylinder tube 7 is formed of such a relatively flexible metal, the cylinder tube 7 is not distorted or deformed.

  The particle layer 32 does not have to be formed in all the above-described parts, and may be formed in at least a part of them. For example, it can be formed on one or both of the surface portion 21 a of the main metal fitting 21 and the surface of the overhanging portion 30 c in the mounting projection 30. Or you may form in the part contact | abutted to the said cylinder tubes 7 other than the part mentioned above.

  The pair of trunnion support fittings 2 and 2 are accurately positioned at positions facing each other by spanning positioning pins 33 between both ends thereof. That is, a pin insertion hole 34 is formed at a position between the two screw holes 29, 29 in the stopper fitting 22 at both ends of each trunnion support fitting 2 so as to penetrate the stopper fitting 22. Reaches the middle part of the arm part 25. The pair of trunnion support special brackets 2 and 2 are relatively positioned by inserting both ends of the positioning pin 33 into the pin insertion hole 34.

  When detecting the operating position of the piston 9 in the fluid pressure cylinder 1, a position sensor (not shown) is attached to a locking groove 17 formed in any outer surface 15 of the cylinder tube 7. As this position sensor, for example, a magnetic sensor for detecting a permanent magnet attached to the piston 9 is used. However, since such a position sensor is general, the illustration thereof is omitted.

  Thus, when the locking groove 17 for mounting the trunnion support fitting 2 is also used as a mounting groove for mounting the position sensor, it is necessary to form the locking groove 17 separately from the sensor mounting groove. Therefore, the fluid pressure cylinder can have a very simple and rational design structure, and if the fluid pressure cylinder already has a sensor mounting groove, the trunnion support fitting 2 can be attached as it is. The locking groove 17 may be formed separately from the sensor mounting groove.

  Next, a fluid pressure cylinder 50 with a trunnion support fitting according to a second embodiment is shown in FIGS. The same components as those in the fluid pressure cylinder 1 with the trunnion support fitting according to the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the fluid pressure cylinder 50 to which the trunnion support fitting according to the second embodiment is mounted, a set of the cylinder tube 52 so that the vertical outer surface 54 and the horizontal outer surface 56 are outside the sensor mounting grooves 58a and 58b. It differs from the fluid pressure cylinder 1 to which the trunnion support fitting 2 according to the first embodiment is attached in that a flange portion 60 is provided and a trunnion support fitting 62 is attached via the flange portion 60. ing.

  The flange portions 60 are formed in a substantially rectangular cross section, and are provided one by one so as to protrude at a predetermined height with respect to the vertical outer surface 54 and the horizontal outer surface 56 of the cylinder tube 52, and the axis of the cylinder tube 52. Extends along the direction. The sensor mounting grooves 58a and 58b provided on the vertical outer surface 54 and the horizontal outer surface 56 are provided parallel to each other with a predetermined distance therebetween, and are formed so as to have different cross-sectional shapes. Specifically, one sensor mounting groove 58a is formed in a substantially rectangular shape in cross section, and the other sensor mounting groove 58b is formed in a round groove having a substantially semicircular cross section. The cross-sectional shapes of the two sensor mounting grooves 58a and 58b are not limited to the above-described rectangular cross-section and semi-circular cross-section.

  A stop fitting 64 constituting the trunnion support fitting 62 is arranged inside the flange portion 60, and a main fitting 66 constituting the trunnion support fitting 62 is arranged outside the flange portion 60. A screw 68 is inserted through the main metal fitting 66 and the metal fitting 64, and the screw 68 is screwed into the metal fitting 64. As a result, the main metal fitting 66 and the metal fitting 64 are connected to each other via the screw 68, and the flange 60 is sandwiched and held between the side wall 66a of the main metal fitting 66 and the side wall 64a of the metal fitting 64 ( (See FIG. 7).

  As described above, in the second embodiment, a pair of flange portions 60 are provided on the longitudinal outer surface 54 and the lateral outer surface 56 of the cylinder tube 52 constituting the fluid pressure cylinder 50, respectively, and the flange portion 60 is used as a trunnion support fitting. The trunnion support fitting 62 is configured to be held by being sandwiched between the main fitting 66 and the stop fitting 64 constituting the 62. For this reason, when the flange portion 60 is clamped by the main metal fitting 66 and the stopper metal 64 under the tightening action of the screw 68, the tightening force of the screw 68 is applied only to the flange portion 60, and the tightening force is Since the main metal fitting 66 and the stopper metal 64 are applied in directions opposite to each other with the flange portion 60 as the center, the cylinder tube 52 having the flange portion 60 is prevented from being deformed by the tightening force. More specifically, since the main metal fitting 66 and the stopper metal 64 are displaced in the direction of approaching each other with the collar portion 60 as the center, the force is canceled and a force that deforms the collar portion 60 is applied. There is nothing to do. As a result, even when the trunnion support fitting 62 is attached to the fluid pressure cylinder 50, the displacement of the piston 9 provided in the cylinder tube 52 is not hindered, and the piston 9 can be smoothly displaced. Become.

  Further, since the trunnion support fitting 62 is attached to the cylinder tube 52 via the flange portion 60, the trunnion support fitting 62 is connected to the fluid pressure cylinder 50 regardless of the shape of the sensor mounting grooves 58 a and 58 b provided in the cylinder tube 52. And can be attached reliably and simply. In other words, the trunnion support fitting 62 having the same shape can be mounted without depending on the shape of the sensor mounting grooves 58a and 58b formed in the cylinder tube 52, and accordingly, the sensor mounting grooves 58a and 58b. Therefore, it is not necessary to prepare various trunnion support fittings according to the shape of each, and it is possible to reduce the number of parts and the manufacturing cost.

It is a partial cross section front view showing the fluid pressure cylinder with a trunnion support metal fitting concerning a 1st embodiment of the present invention. It is a top view of the fluid pressure cylinder with a trunnion support metal fitting shown in FIG. It is sectional drawing along the III-III line of FIG. It is a principal part enlarged view of FIG. FIG. 4 is a partially exploded sectional view showing a state where one trunnion support fitting is removed from the fluid pressure cylinder shown in FIG. 3. It is a partial cross section front view which shows the fluid pressure cylinder with a trunnion support bracket which concerns on the 2nd Embodiment of this invention. It is a principal part enlarged view of FIG. FIG. 7 is a partially exploded cross-sectional view showing a state where one trunnion support fitting is removed from the fluid pressure cylinder shown in FIG. 6. It is a top view which shows the conventional fluid pressure cylinder with a trunnion support metal fitting. FIG. 10 is a side view of the fluid pressure cylinder with trunnion support fitting shown in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 50 ... Fluid pressure cylinder 2, 62 ... Trunnion support bracket 3 ... Support shaft 4 ... Bearing member 7, 52 ... Cylinder tube 8 ... Cylinder bore 9 ... Piston 10 ... Piston rod 11 ... Head cover 12 ... Rod cover 13a, 13b ... Port 15a, 54 ... Vertical outer surface 15b, 56 ... Lateral outer surface 17 ... Locking grooves 21, 66 ... Main metal fittings 22, 64 ... Fasteners 23, 68 ... Screws 25 ... Arm 26 ... Positioning protrusion 30 ... Mounting protrusion Part 32 ... Particle layer 33 ... Positioning pins 58a and 58b ... Sensor mounting groove 60 ... Gutter

Claims (1)

In a fluid pressure cylinder that displaces a piston provided inside a cylinder tube under the action of pressure fluid supply, a trunnion support fitting for swingingly supporting the fluid pressure cylinder on a bearing member is provided on an outer surface of the cylinder tube. A fluid pressure cylinder provided with a trunnion support bracket,
The trunnion support fitting is formed in a substantially concave shape in cross section, is mounted along the longitudinal outer surface of the cylinder tube, and both end portions are outside the flanges formed on the lateral outer surface of the cylinder tube. A set of main metal fittings arranged in
A set of fasteners provided at both ends of the main metal fitting and disposed so as to be inside the flange;
A screw for connecting the main metal fitting and the fastener;
With
The main metal fitting and the holding metal fitting are arranged to face each other with the flange portion interposed therebetween, and the flange portion is sandwiched under the tightening action of the screw, and the flange portion is formed in a substantially rectangular cross section. One set is provided on each of the two vertical outer surfaces of the tube and the other two opposite lateral outer surfaces, and is formed so as to protrude from the vertical outer surface and the lateral outer surface, and the displacement position of the piston can be detected. A fluid pressure cylinder with a trunnion support bracket, wherein the fluid pressure cylinder is provided at a position on an outer side with respect to a mounting groove of the cylinder tube to which a detection sensor is mounted.

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