JP2006220205A - Explosion-proof type constant angle rotating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an explosion-proof constant-angle rotating device that rotates a rotating object with a certain degree of accuracy with high accuracy, has excellent durability, and can be downsized.
SOLUTION: A slide table 58a having a pair of guide pins 59 that reciprocates in a linear direction by supplied air and a fixed direction by a reciprocation of the slide table 58a disposed between the pair of guide pins 59. The intermittent rotation cam 60 that is intermittently rotated, and the rotation target body 52 that is interlocked with the rotation operation of the intermittent rotation cam 60 are provided. A guide pin 59 abuts on the intermittent rotation cam 60. A plurality of inclined surfaces 60a for rotating the intermittently rotating cam 60 are provided at a certain angle in the circumferential direction, and the intermittently rotating cam 60 is configured such that when the guide pin 59 pressing the inclined surface 60a reverses the moving direction. The turning operation is stopped, and another inclined surface different from the inclined surface 60 a faces the other guide pin 59.
[Selection] Figure 1

Description

  The present invention relates to an explosion-proof constant angle rotating device.

  A high-pressure gas filling apparatus that fills a cylinder as a filling container with a combustible high-pressure gas is already known. In this type of high-pressure gas filling apparatus, there is a type in which a gas filling process is automatically performed, and the automatic filling process is performed as follows.

  As shown in FIG. 7, first, an empty cylinder 3 is loaded onto the weighing platform 2 in which the weighing apparatus 1 is built, and is chucked by the chucking apparatus 4 so that the loaded cylinder 3 does not fall down. When the chucking is completed, the filling unit 6 is lowered with respect to the container valve 5 provided at the upper end of the cylinder 3 as indicated by the phantom line in the figure, and the filling nozzle 7 of the filling unit 6 is moved to the filling port of the container valve 5. 8 to bond.

  When the connection between the filling nozzle 7 and the filling port 8 is finished, the handle 9 of the container valve 5 is turned to open the filling valve of the gas supply path in the container valve 5 and the filling of the high pressure gas into the cylinder 3 is started. When the metering device 1 detects that the amount of high-pressure gas filled in the cylinder 3 has reached a fixed amount from the weight of the cylinder 3, the handle 9 of the container valve 5 is turned in the opposite direction to close the filling valve. The filling nozzle 7 is pulled away from the filling port 8 of the container valve 5 and the filling unit 6 is raised so that the cylinder 3 can be unloaded, and the chucking state by the chucking device 4 is released to release the cylinder 3. Is being carried out.

  In such an automatic filling process, although not shown, an air cylinder for cylinder chucking, an air cylinder for elevating and lowering a filling unit, an air cylinder for exiting and exiting a filling nozzle, an air cylinder for switching a filling valve, and an air cylinder for unloading a cylinder Many air actuators are used.

  According to laws and regulations, in workplaces where flammable high-pressure gas is filled into cylinders, explosion-proof measures are taken to prevent the surrounding atmosphere from being ignited by electric sparks generated at the contact points of the electric circuit when operating the air actuator. It is necessary to take

  As an explosion-proof measure, for example, a contact point of an electric circuit that may cause an electric spark is accommodated in a metal container having a thickness greater than a predetermined dimension, and the atmosphere inside the container and the atmosphere outside the container Explosion-proof construction that isolates the gaps that communicate with each other within the specified dimensions and prevents the explosion from reaching the outside atmosphere even if an electrical spark occurs in the container and an explosion occurs. There is.

  In the case of such a pressure-proof explosion-proof structure, it is possible to reliably prevent ignition of the atmosphere outside the container even if an electric spark occurs at the contact point in the container and an explosion occurs in the container. The above-mentioned air actuator can be operated without problems, but it is necessary to cover all the places where electric sparks may occur with a thick metal container. There is a problem that it takes.

  The intrinsically safe explosion-proof structure is used to counter this. Instead of covering the area where the electric spark may occur with a metal container, the electric current used is such that the electric energy of the spark is lower than the minimum ignition energy of the explosive gas. There is an advantage that the explosion-proof measures with high reliability can be applied at a low cost as compared with the pressure-proof explosion-proof structure and also to prevent the explosion itself.

  However, in the case of an intrinsically safe explosion-proof structure, not only can a large current be used to activate the air actuator, but even a weak current that can be used directly opens and closes the solenoid valve for operating the air actuator with an air signal. Can not do. Therefore, in an intrinsically safe explosion-proof structure, an electrical signal generated by a weak current is converted into an air signal that does not pose an explosion risk, and the supply of drive air to each air actuator is turned on and off based on this air signal. These air actuators must be activated.

  An explosion-proof air control device that employs the intrinsically safe explosion-proof structure and operates each air actuator in accordance with the order of the automatic gas filling process is described in Patent Document 1, which is a patent application filed by the present applicant. ing. Hereinafter, this apparatus will be described with reference to FIG.

  As shown in FIG. 8, the explosion-proof air control device 10 converts the electric spark energy generated in the main body of the filling machine installed at the gas filling site to be lower than the minimum ignition energy of the explosive gas. The safety holder 11, the microcomputer 12 connected to the safety holder 11, and the permanent magnet every time an electric signal from the microcomputer 12 is energized to the coil 13a. The voice coil motor 13 that projects the projection 13b attached to the coil 13a by acting on the magnetic field 13c, and the projection 13b withdraws and retracts from the air gap 14a by an electrical signal from the microcomputer 12, so that the control air 15 Passes or shuts off, that is, the control air 15 is turned on and off to An air sensor 14 that converts the air sensor 14 into an air signal, an air amplifier 16 that amplifies the control air 15 that has passed through the air sensor 14, and an explosion-proof constant angle rotation device 17 that is supplied with the control air amplified from the air amplifier 16. Is provided. The explosion-proof constant angle rotating device 17 is disposed at the center of the explosion-proof air control device 10 as shown in FIG. Moreover, 18a-18c in FIG. 8 has shown the air source, the air supplied from the air source 18b is stronger than the air supplied from the air source 18a, and moreover than the air supplied from the air source 18b. Also, the air supplied from the air source 18c is stronger and the control air 15 is amplified.

  The explosion-proof constant-angle rotating device 17 is controlled by a certain angle (for example, 15 degrees) each time the control air amplified by the air amplifier 16 is alternately supplied to PX and PY based on the electric signal of the microcomputer 12. An index motor 19 that intermittently rotates the rotation target body 20, a rotation shaft 20 c that is coaxially fixed to the index motor 19, and a rotation target body 20 that is integrally fixed to the rotation shaft 20 c. The rotating object 20 has a large number of cam plates 20a fixed integrally to the rotating shaft 20c.

  As a configuration in which the air amplifier 16 alternately supplies control air to PX and PY to the index motor 19 based on an electric signal from the microcomputer 12, there is a structure as shown in FIG.

  In FIG. 9, reference numerals 70, 71 and 72 are flow path switching valves, 73, 74 and 75 are air flow paths, 76 and 77 are branch sections of the air flow path, and 78 is an air source, which are connected as shown in the figure. Has been. The flow path switching valves 70, 71, 72 are configured to be switchable when flow path patterns 79 a, 79 b arranged up and down as shown in the figure push the pilot operation portions 80 a, 80 b with air or spring pressure. ing. The pilot operating portion 80b of the flow path switching valve 70 is urged in a direction to push the pilot operating portion 80b by an urging spring 81 disposed at a position corresponding to the pilot operating portion 80b. In the drawing, the air flow path indicated by a solid line indicates a state where air passes, and the air flow path indicated by a broken line indicates a state where air does not pass.

  First, as shown in FIG. 9A, when an air signal based on the electrical signal of the microcomputer 12 is supplied to the pilot operation unit 80a in the flow path switching valve 70 (the air signal is turned ON), The pilot operating portion 80 a in the flow path switching valve 70 is pushed against the biasing force of the biasing spring 81, and the air source 78 and the flow path pattern 79 a in the flow path switching valve 70 are communicated with each other. The air supplied from the air source 78 flows through the air flow path 73 and pushes the pilot operating portion 80 b in the flow path switching valve 71. Thereby, the flow path pattern 79b in the flow path switching valve 71 and the air flow path 74 are communicated.

  When the air signal is not supplied (the air signal is turned off), the pilot operating portion 80b in the flow path switching valve 70 is pressed by the biasing force of the biasing spring 81 as shown in FIG. The flow path pattern 79a and the flow path pattern 79b are switched, and the air source 78 and the flow path pattern 79b in the flow path switching valve 70 are communicated with each other. The air supplied from the air source 78 flows through the air flow path 74 and is branched at the branching section 76, one of which is supplied to the index motor 19 as control air PX, and the other is the pilot of the flow path switching valve 72. Press the operation unit 80b. Thereby, the flow path pattern 79b in the flow path switching valve 72 and the air flow path 75 are communicated.

  When the air signal is turned on again with respect to the pilot operation unit 80 a in the flow path switching valve 70, the pilot operation unit 80 a in the flow path switching valve 70 is connected to the biasing spring 81 as shown in FIG. Pushed against the urging force, the air source 78 and the flow path pattern 79 a in the flow path switching valve 70 communicate with each other. The air supplied from the air source 78 flows through the air flow path 75 and pushes the pilot operation unit 80 a in the flow path switching valve 71. Thereby, the flow path pattern 79a in the flow path switching valve 71 and the air flow path 74 are communicated.

  When the air signal is turned OFF again, as shown in FIG. 9D, the pilot operating portion 80b of the flow path switching valve 70 is pressed by the biasing force of the biasing spring 81, and the flow path pattern 79a and the flow path The pattern 79b is switched, and the air source 78 and the flow path pattern 79b in the flow path switching valve 70 are communicated with each other. Then, the air supplied from the air source 78 flows in the air flow path 74 and is branched at the branching portion 77, one is supplied to the index motor 19 as control air PY, and the other is the pilot of the flow path switching valve 72. Press the operation unit 80a. Thereby, the flow path pattern 79a in the flow path switching valve 72 and the air flow path 75 are communicated.

  Then, when the air signal is turned ON again, the state shown in FIG. The operations shown in FIGS. 9A to 9D are repeatedly performed by switching the air signal on and off based on the electrical signal of the microcomputer 12, so that the control air is supplied to the index motor 19. PX and PY are supplied alternately.

  In addition, a protruding portion 20b protruding in the radial direction is formed on the outer periphery of each cam plate 20a, and the protruding portion 20b of the cam plate 20a is in contact with a portion corresponding to the outer peripheral portion of each cam plate 20a. A mechanical micropilot operating section (hereinafter referred to as a micropilot operating section) 21 is disposed. The micropilot operating unit 21 is formed by the outer periphery of the rotating object 20, that is, the outer peripheral surface of the cam plate 20a where the protrusion 20b is not formed and the outer peripheral surface of the portion where the protrusion 20b is provided. The on / off of the outer periphery of the rotating object 20 to be formed is turned on and off, and the air for switching the opening / closing operation of the air valve 22 described later is output and stopped.

  The projections 20b of the respective cam plates 20a are not illustrated in order to set the timing for turning on the corresponding micropilot operation units 21, but are not located at predetermined positions on the outer periphery of the cam plate 20a. It is formed with a circumferential length.

  When the rotation target 20 is intermittently rotated from the origin position by a constant angle by the index motor 19, the protrusion 20b comes into contact with the micropilot operating unit 21 along with the rotation, so that the micropilot The operation unit 21 is turned on, and the opening / closing operation of the air valve (air operation type switching valve) 22 connected to the micropilot operation unit 21 is switched.

  Then, by this air valve 22, a cylinder chucking air cylinder, a filling unit lifting / lowering air cylinder, a filling nozzle exit / retreat air cylinder, a filling valve switching air cylinder, and a cylinder unloading air connected to the air valve 22 are provided. The driving air supply to the air actuator 23 such as a cylinder is switched on and off, thereby operating each air actuator 23 in accordance with the order of the automatic gas filling process. In addition, every time the rotation target body 20 makes one rotation, a filling process of one cycle is performed, and every time the rotation target body 20 rotates by 15 degrees, it is described in FIG. As described above, many processes such as loading of a cylinder, chucking of a cylinder, filling of gas, release of chucking, and unloading of a cylinder are automatically performed in a predetermined order.

  The present applicant has made the explosion-proof type constant angle rotating device 17 described above more concrete, and has put it into practical use as shown in FIGS. Hereinafter, this practical example will be described with reference to FIGS. 11 is a side view of the explosion-proof constant-angle rotating device 30 shown in FIG. 10, and FIG. 12 is a cross-sectional view taken along line AA in FIG. 10 to 12, the rotation target body 32 includes a plurality of rail members 42 (details will be described later).

  As shown in FIGS. 10 to 12, the explosion-proof constant-angle rotating device 30 includes an index motor 31 and a rotation target body 32 that is rotated by a certain angle, for example, 15 degrees, by the index motor 31. The object 32 is accommodated in the housing 33.

  The rotation indexing portion 34 (details will be described later) of the index motor 31 and the rotation target body 32 are integrally fixed to the rotation shaft 35 so as to integrally rotate by the same angle. One end and the other end are rotatably supported by the housing 33 via a bearing 36.

  The index motor 31 is fixed to a support base 37 attached to the housing 33, and control air is alternately supplied from the air amplifier 16 to PX and PY, so that the slide table 38c is moved along the guide rail 38g in the horizontal direction (hereinafter referred to as the following). A first slide member 38 to be slid in the X direction), fixed to the lower surface of the slide table 38c, slides in the X direction together with the slide table 38c, and Y direction (FIG. 11 and FIG. 11) orthogonal to the X direction at both ends. 12) and a guide plate 40c that is guided by the guide portion 39a of the slide plate 39, and slides in the X direction along with the slide plate 39. Slide in the Y direction along 39a and rotate indexing section to be described later The second slide member 40 that performs indexing by rotating 4 by a predetermined angle, and the rotation index that is arranged at a position between both the second slide members 40 and rotates the rotating object 32 integrally. Part 34.

  As shown in FIGS. 13 (a) and 13 (b), the main body portion 38h of the first slide member 38 is hollow, and seal rubber 38d is attached to both ends of the main body portion 38h so as to control air. A plug body 38e that receives PX and PY and moves in the main body 38h in the X1 direction and the X2 direction is disposed, and a joint shaft provided on a slide table 38c is provided at the center of the plug body 38e. 38f is inserted, and the slide table 38c is moved in the X1 direction and the X2 direction as the plug body 38e moves in the X direction.

  As shown in FIG. 13A, when the control air PX is supplied from the air amplifier 16 to the air supply port 38a, the control air PX presses the plug body 38e in the X1 direction, and the plug body 38e Along with this, the slide table 38c attached to the plug body 38e slides in the X1 direction along the guide rail 38g. Further, as shown in FIG. 13B, when the control air PY is supplied from the air amplifier 16 to the air supply port 38b, the control air PY presses the plug body 38e in the X2 direction, and this plug body 38e moves in the X2 direction, and accordingly, the slide table 38c slides in the X2 direction along the guide rail 38g.

  As shown in FIGS. 10 to 12, the second slide member 40 is formed with a protruding portion 40 a that protrudes toward the rotation index portion 34 and a guide pin 40 b that protrudes downward. The housing 33 is provided with a guide member 41 that guides the guide pin 40b to the diagonally forward side and the diagonally rear side along the guide groove 41a.

  Further, as shown in FIGS. 10 to 12, the rotation indexing portion 34 has a plurality of, for example, 24 pins 34 b on the outer peripheral edge of a pair of disk portions 34 a fixed to the rotation shaft 35, 15 degrees in the circumferential direction. It is erected in parallel with the rotation shaft 35 at intervals.

  The rotation target body 32 includes a plurality of, for example, 24 rail members 42 on the outer periphery of a pair of disk portions 32 a fixed to the rotation shaft 35 along the rotation shaft 35 at intervals of 15 degrees in the circumferential direction. It is extended.

  Projecting piece members 43 that contact the plurality of micropilot operating portions 21 arranged in a line along the length direction are attached to predetermined positions in the length direction of the respective rail members 42. This piece member 43 is used to set the timing for turning on the corresponding micropilot operation section 21 as in the projection 20b of the cam plate 20a in the explosion-proof constant angle rotating device 17 shown in FIG. Are provided at predetermined positions.

  Further, although not shown, an air valve 22 is connected to the micropilot operation unit 21 shown in FIG. 10, as in the micropilot operation unit 21 shown in FIG. Are connected to an air actuator 23 such as a cylinder chucking air cylinder, a filling unit lifting / lowering air cylinder, a filling nozzle exit / retreat air cylinder, a filling valve switching air cylinder, and a cylinder unloading air cylinder.

  In such a configuration, when the control air PX is supplied to the air supply port 38b after the control air PX is supplied to the air supply port 38a in the first slide member 38, the slide plate 39 is moved together with the slide table 38c. Slides in the X direction (X2 direction), and accordingly, the second slide member 40 also moves in the X direction.

  At this time, as shown in FIG. 12, the guide pin 40b of the second slide member 40 moves in the X direction and contacts the wall surface of the guide groove 41a of the guide member 41. In this case, the second slide member 40 is slidable in the Y direction perpendicular to the slide plate 39, the second slide member 40 is simultaneously displaced in the X direction and the Y direction, and the second slide member 40 has the shape of the guide groove 41a. Along the direction, the guide is guided in an oblique direction indicated by an arrow A in the figure. Thus, as the second slide member 40 is guided in the direction of the arrow A, the protrusion 40a on the second slide member 40 on the right side as seen in FIG. In this case, the protrusion 40a of the second slide member 40 is guided by the guide member 41, and the gap 44 between the pins 34b and 34b of the rotary indexing portion 34 is inclined. , Abuts against the pin 34b on the traveling direction side of the protruding portion 40a, and presses the pin 34b to the oblique direction side, so that a clockwise rotational force F is applied to the rotation indexing portion 34.

  Then, when the protruding portion 40a further enters the gap 44 in the oblique direction, the rotation indexing portion 34 further rotates, and when the protruding portion 40a fully enters the gap 44, the slide table 38c moves in the X direction. Accordingly, the slide plate 39 and the second slide member 40 are stopped, and the rotation of the rotary indexing portion 34 is stopped. Here, the movement of the second slide member 40 on the right side as viewed in FIG. 12 has been described. However, when the second slide member 40 on the right side moves as described above, as shown in FIG. The second slide member 40 on the left side when viewed is the opposite movement to the second slide member 40 on the right side. That is, the second slide member 40 on the left side is guided in an oblique direction indicated by an arrow A in the drawing, so that the protruding portion entering the gap 44 between the pin 34b and the pin 34b of the rotation indexing portion 34. 40a comes out of the gap 44 in the X direction, and then the second slide member 40 on the left side moves in an oblique direction along the guide groove 41a in the guide member 41, as indicated by a virtual line, The protrusion 40a of the second slide member 40 on the right side completely enters the gap 44 between the pin 34b and the pin 34b, and at the same time returns to the position farthest from the rotation indexing portion 34.

  By supplying the control air from the air amplifier 16 to the index motor 31 alternately with PX and PY, the rotation indexing portion 34 in the index motor 31 is intermittently rotated by a certain angle in a certain direction as described above. The rotating object 32 fixed integrally with the rotation indexing unit 34 also rotates intermittently in the same manner as the rotation indexing unit 34.

And in the rail member 42 of the position which opposes each micro pilot operation part 21 arranged in a row in the rotation object 32, in the location where the piece member 43 is provided, the micro pilot which this piece member 43 opposes. When the micropilot operating section 21 is turned on by contacting the operating section 21 and the piece member 43 is not provided, the micropilot operating section 21 facing this is turned off, so that FIG. As in the case described with reference to FIG. 2, switching of the opening / closing operation of the air valve 22 is performed. As a result, each air actuator 23 connected to each air valve 22 is changed as shown in FIG. It operates according to the sequence of the automatic gas filling process.
JP-A-8-247394

  In the explosion-proof constant-angle rotating device 30 described with reference to FIGS. 10 to 13, a rotation index fixed coaxially to the rotating object 32 so as to intermittently rotate the rotating object 32 by a certain angle. The portion 34 is intermittently rotated by a fixed angle. At this time, the protrusion portion 40a of the second slide member 40 enters the gap 44 between the pins 34b of the rotation indexing portion 34 and enters the oblique direction to rotate. Since the index portion 34 is intermittently rotated, the gap 44 is made large so that the protruding portion 40a can easily enter even from an oblique direction.

  For this reason, as shown in FIG. 12, the clearance in the circumferential direction between the projecting portion 40a and the pin 34b that has entered the clearance 44 is increased, and the rotation angle of the rotation index portion 34 is varied by this clearance. In some cases, the micropilot operation unit 21 may not be switched on and off as set, resulting in a decrease in reliability with respect to each air actuator 23 being operated accurately.

  Since the rotation indexing unit 34 and the rotation target body 32 are integrally fixed and rotated, the rotation indexing unit 34 is rotated by a predetermined angle to rotate the rotation target body 32 by a predetermined angle. If the rotation angle is as small as 15 degrees, a large number of pins 34b are required, and a large number of gaps 44 between the pins 34b and 34b are also necessary. In addition, there is a problem that the diameter of the rotation index portion 34 is increased and the explosion-proof constant angle rotation device 30 is increased in size.

  Further, in order to apply the rotational force F to the rotation indexing portion 34, the protrusion 40a is brought into contact with the pin 34b in the rotation indexing portion 34 in an oblique direction, so that the impact received by the rotation indexing portion 34 is large and explosion-proof. When the constant angle rotating device 30 is operated, vibration is generated, which may adversely affect the durability performance of the device.

  SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-described problems, and to provide an explosion-proof constant-angle rotating device that can rotate a rotating object with a certain degree of accuracy and that has excellent durability and can be downsized. To do.

  In order to solve the above-mentioned problem, the invention according to claim 1 is arranged between a pair of protrusions and a movable body that reciprocates in a predetermined linear direction by supplied air and has a pair of protrusions. The intermittently rotating cam that rotates intermittently by a fixed angle in a fixed direction by the protrusions coming into contact alternately from both sides by the reciprocating movement of the moving body, and the rotating operation of the intermittently rotating cam A rotating object that is intermittently rotated in conjunction with the inclined rotating cam, and the intermittent rotating cam is pressed when the protrusion comes into contact with and further moves to rotate the intermittent rotating cam. A plurality of surfaces are provided at a certain angle in the circumferential direction, and the intermittent rotation cam stops the rotation operation when the protrusion that presses the inclined surface reverses the movement direction, and the inclination Another inclined surface different from the surface is on the other protrusion One in which to become a posture facing in.

  According to such a configuration, the inclined surface of the intermittently rotating cam is brought into contact with the protruding portion of the moving body that reciprocates in a predetermined linear direction, so that the inclined surface is directly pressed by the contacting protrusion. The intermittent rotation cam can be rotated, and when the protrusion pressing the inclined surface reverses the movement direction, the intermittent rotation cam can be stopped and positioned so that the intermittent rotation cam can be positioned. In addition to being able to be rotated intermittently at a constant angle with high accuracy, the rotating object interlocked with the intermittently rotating cam can be rotated intermittently at a constant angle with high accuracy. In addition, since the intermittently rotating cam is rotated by pressing the inclined surface as it is by the abutting protrusion, it is possible to prevent a large impact from being generated when rotating the intermittently rotating cam, and an explosion-proof constant angle It is possible to prevent the occurrence of vibration when the rotating device is operated and to enhance the durability performance.

  According to a second aspect of the present invention, in the explosion-proof constant-angle rotating device according to the first aspect, the rotational angle of the rotating object is set between the intermittent rotating cam and the rotating object. A gear mechanism that is smaller than the moving angle is interposed.

  According to such a configuration, for example, when the member that is intermittently rotated by the pair of protrusions in the moving body and the rotating object are fixed coaxially and the rotation angle of the rotating object is set. In comparison, even when the rotation angle of the rotating object is set finely, the intermittent rotation cam may be rotated at a large rotation angle by one movement of the moving body, and therefore the intermittent rotation cam. The number of inclined surfaces can be reduced to a small number, an intermittent rotating cam having a small diameter can be adopted, and the explosion-proof constant angle rotating device can be downsized. Moreover, even if the intermittent rotation cam is rotated at a large angle, the rotation angle of the rotating object is converted to be smaller than the rotation angle of the intermittent rotation cam via the gear mechanism, so that it is easy and accurate. The object to be rotated can be rotated.

  According to a third aspect of the present invention, in the explosion-proof constant-angle rotating device according to the first or second aspect, the object to be rotated is switched to a plurality of air-operated types via a plurality of detecting devices that detect the unevenness by the unevenness on the outer periphery. The valve is opened and closed, and a plurality of air actuators connected to the plurality of air operated switching valves are operated.

  According to such a configuration, the explosion-proof constant angle rotating device can operate a plurality of air actuators based on the supplied air signal. For example, in an environment where the surrounding atmosphere is an explosive gas. Also, the ignition to the surrounding atmosphere can be surely prevented, and the occurrence of explosion can be prevented.

According to a fourth aspect of the invention, the explosion-proof constant angle rotating device according to any one of the first to third aspects is provided.
According to such a structure, the rotation target body interlocked with the intermittent rotation cam in the explosion-proof constant angle rotating device by providing the explosion-proof constant angle rotating device according to any one of claims 1 to 3. Can be intermittently rotated at a constant angle with high accuracy, a plurality of detection devices for detecting irregularities on the outer periphery of the rotating object, and a plurality of air operated switching valves connected to the plurality of detection devices Thus, a plurality of air actuators connected to the plurality of air operated switching valves can be accurately operated, and a highly reliable explosion-proof air control device can be provided.

  As described above, according to the present invention, the protrusion of the moving body is brought into contact with the inclined surface of the intermittently rotating cam, and the intermittently rotating cam is rotated by pressing the inclined surface as it is. Therefore, the intermittently rotating cam and the rotating object can be rotated with a certain angle with high accuracy. In addition, since the intermittently rotating cam is rotated by pressing the inclined surface as it is by the projecting portion brought into contact with the inclined surface of the intermittently rotating cam, a large impact is generated when the intermittently rotating cam is rotated. This can improve the durability performance of the explosion-proof constant angle rotating device and improve the reliability. In addition, for example, compared to a case where a member that is intermittently rotated by a pair of protrusions in a moving body and the rotation target body are fixed coaxially and the rotation angle of the rotation target body is set, the rotation target Even when the rotation angle of the body is set finely, the intermittent rotation cam may be rotated at a large rotation angle by a single movement operation of the moving body, thus forming an inclined surface in the intermittent rotation cam Therefore, an intermittent rotation cam with a small diameter can be employed, and the explosion-proof constant angle rotation device can be downsized. Moreover, even if the intermittent rotation cam is rotated at a large angle, the rotation angle of the rotating object is converted to be smaller than the rotation angle of the intermittent rotation cam via the gear mechanism, so that it is easy and accurate. The object to be rotated can be rotated.

  An explosion-proof constant angle rotating device 50 according to an embodiment of the present invention will be described with reference to FIGS. 2 is a side view of the explosion-proof constant-angle rotating device 50 shown in FIG. 1, and FIG. 3 is a view taken along arrow BB in FIG. In addition, the same code | symbol is attached | subjected to the thing similar to what was demonstrated in FIGS. 7-13, and the detailed description is abbreviate | omitted.

  The explosion-proof constant-angle rotating device 50 of the present invention includes a plurality of filling machines as shown in the embodiment of Patent Document 1 which is a patent application filed by the present applicant and FIG. 6 of Patent Document 1. 2 is arranged on a rotary table, a filling nozzle is connected to a cylinder 4 carried into the filling machine 2 from the carry-in line, and high-pressure gas is quantitatively filled while the rotary table is rotating toward the carry-out line. In the filling equipment for sending the filled cylinder to the carry-out line, it is provided in a main body provided with an indicator in the filling machine 2 as shown in FIG.

  The filling machine 2 includes a loading OK signal generating cylinder, a cylinder chucking cylinder, a filling unit lifting cylinder, a filling unit lifting fine adjustment cylinder as shown in FIG. Various air actuators such as valve block cylinders, nozzle pushing cylinders, valve clamp lifting cylinders, valve clamp rotating cylinders, filling valve switching cylinders, cylinder unloading cylinders as shown in FIG. The explosion-proof constant-angle rotating device 50 of the present invention is replaced with a constant-angle rotating device in an explosion-proof air control device that controls these air actuators at the timing shown in FIG. It is adopted. The configurations other than the explosion-proof low-angle rotating device 50 of the present invention are the configurations described in paragraphs [0009] to [0035] in the embodiment of Patent Document 1, and FIGS. 1 to 7 of Patent Document 1. In this embodiment, only the explosion-proof constant angle rotating device 50 will be described, and the configuration other than the explosion-proof constant angle rotating device 50 is the same as that shown in the example of Patent Document 1 because it is the same as the configuration shown. I want to be helpful.

  As shown in FIGS. 1 to 3, the explosion-proof constant angle rotating device 50 of the present invention includes an index motor 51 and a rotating object 52 that is intermittently rotated by a constant angle, for example, 15 degrees by the index motor 51. The rotating object 52 is accommodated in a housing 53.

  A driven side gear 56 of the drive side gear 55 and the driven side gear 56 constituting the gear mechanism is integrally fixed to the rotating shaft 54 at one end of the rotation target body 52. On the end side, for example, 19 cam plates 57 are fixed integrally with the rotating shaft 54, and one end and the other end of the rotating shaft 54 are rotatably supported by the housing 53 via the bearing 36. Yes. As shown in FIG. 6, projections 57 a are formed on the outer periphery of these cam plates 57, and as a result, irregularities are formed on the outer periphery of the rotating object 52 as shown in FIGS. 1 and 2. The The protrusion 57a in the cam plate 57 is in contact with the protrusion 57a in order to set the timing for turning on the micropilot operating portion 21 as a detection device that detects irregularities on the outer periphery of the rotating object 52. A predetermined circumferential length is formed at a predetermined position on the outer periphery of 57. Therefore, the shape of the cam plate 57 is not limited to the shape shown in FIG.

  In addition, among the plurality of micropilot operating units 21, for example, 14 micropilot operating units 21A on the driven gear 56 side include air as in the explosion-proof constant angle rotating device 30 described with reference to FIGS. Valves (air operation type switching valves) 22 are connected so that the air actuators 23 can be operated in accordance with the order of the automatic gas filling process. Further, the remaining five micropilot operation parts 21 </ b> B are used for detecting the current rotation position of the rotation object 52 by the protrusions 57 a on the cam plate 57. As described above, by detecting the current position of the rotating object 52, it is possible to grasp which process is currently being performed on the loaded cylinder, and troubles and the like occur. When the device stops, it is possible to grasp in which process the trouble has occurred. Since these micropilot operating parts 21B can be operated with a weak current that can be used in an intrinsically safe explosion-proof structure, even if an electric spark occurs, the surrounding atmosphere is not ignited and explosion-proof. There is no decrease in the reliability.

  The index motor 51 includes a slide member 58 that linearly slides a slide table 58a as a moving body in the X direction by supplying control air alternately from the air amplifier 16 to PX and PY, and a lower surface of the slide table 58a. A pair of guide pins 59 as a pair of protrusions provided, and an intermittently rotating cam 60 disposed between the pair of guide pins 59 and intermittently rotated by the pair of guide pins 59; The drive-side gear 55 is fixed to the rotation shaft 61 so as to rotate integrally with the intermittent rotation cam 60. Since the slide member 58 slides the slide table 58a along the guide rail 58b on the same principle as the first slide member 38 described in FIG. 13, detailed description is omitted here. In the above description, the case where the gear mechanism is constituted by two gears, that is, the drive side gear 55 and the driven side gear 56 is described. However, the present invention is not limited to this, and a large number of two or more gears are used. The gear mechanism may be configured by using.

  As shown in FIG. 4, the intermittent rotation cam 60 is inclined with respect to the X direction that is the moving direction of the guide pin 59 and is also provided on the inclined surface 60 a on which the guide pin 59 contacts and the outer peripheral surface of the guide pin 59. A plurality of, for example, five guide pin holding surfaces 60b formed in an arc shape so as to be able to come in contact with each other at regular angles in the circumferential direction. It is shaped like a Geneva gear that protrudes and curves in the same direction.

  In such a configuration, when the control air PX and PY are alternately supplied from the air amplifier 16 to the index motor 51, the slide table 58a moves in the X direction along the guide rail 58b as shown in FIGS. Slide.

  At this time, if the control air PX is supplied, as shown in FIG. 4, one guide pin 59 of the pair of guide pins 59 provided on the slide table 58a is moved along with the movement of the slide table 58a. The right side surface in the traveling direction of the guide pin 59 comes into contact with the inclined surface 60a of the intermittent rotation cam 60. The guide pin 59 is further moved in the X1 direction as indicated by a one-dot chain line A in the figure, so that the inclined surface 60a is pressed in the X1 direction as it is, and the intermittently rotating cam is operated by the action of the inclined surface 60a. 4 is rotated counterclockwise as seen in FIG. 4, and the guide pin 59 moves further in the X1 direction than this position as indicated by a two-dot chain line B in FIG. However, it contacts the guide pin holding surface 60b of the intermittently rotating cam 60 in a wide arc-shaped range. As described above, the guide pin 59 comes into contact with the guide pin holding surface 60b in a wide arc-shaped range, so that the intermittent rotation cam 60 is positioned in the rotation direction and the opposite direction, and intermittent rotation is performed. The rotation operation of the cam 60 can be stopped reliably, and the intermittent rotation cam 60 can be accurately rotated by a certain angle.

  Further, as shown in FIG. 5, when one guide pin 59 comes into contact with the guide pin holding surface 60b, the intermittent rotation cam 60 has another inclination different from the inclined surface 60a with which the one guide pin 59 abuts. The posture in which the surface 60a faces the other guide pin 59, that is, when the other guide pin 59 moves and is pressed against the other inclined surface 60a, the intermittent rotation cam 60 is The posture rotates in the same direction and at the same angle as the rotation direction of the one guide pin 59.

  Next, when the control air PY is supplied to the index motor 52 and the slide table 58a moves in the X2 direction, the guide pin 59 contacts and presses the inclined surface 60a of the intermittent rotation cam 60 in the same manner as described above. The intermittent rotation cam 60 is rotated by a certain angle in the same direction.

As shown in FIG. 5, the control air is supplied alternately to PX and PY to the index motor 51, so that the slide table 58a slides alternately in the X1 direction and the X2 direction, and accordingly, the slide table 58a is provided on the slide table 58a. The pair of guide pins 59 that are in contact with each other alternately from both sides of the intermittent rotation cam 60 causes the intermittent rotation cam 60 to rotate intermittently in a fixed direction and at a fixed rotation angle.

  By intermittently rotating the intermittent rotation cam 60, the drive side gear 55 fixed to the rotation shaft 61 of the intermittent rotation cam 60 also rotates intermittently in the same manner, and the driven side gear 56. The rotating object 52 can be intermittently rotated by a certain angle via the.

  As described above, the intermittent rotation cam 60 performs two rotation operations while the slide table 58a reciprocates once, and this is one-fifth rotation of the intermittent rotation cam 60. When the rotation angle of the cam 60 is 36 degrees, the number of teeth of the driving gear 55 is 20, and the number of teeth of the driven gear 56 is 48, the rotation angle of the rotation object 52 is 36. X20 / 48 = 15 degrees.

  As described above, the driving side gear 55 and the driven side gear 56 as the gear mechanism are interposed between the intermittently rotating cam 60 and the rotation target body 52, and the number of teeth of the driving side gear 55 is set to the driven side gear 56. The rotation angle of the rotation target body 52 can be set to an angle smaller than the rotation angle of the intermittent rotation cam 60. For example, the explosion-proof type constant shown in FIG. Compared to the case where the rotation indexing unit 34 and the rotation target body 32 are coaxially fixed and rotate by the same angle as in the angle rotation device 30, the intermittent rotation cam 60 is moved by one movement operation of the slide table 58a. Therefore, the number of the inclined surfaces 60a formed in the intermittent rotation cam 60 can be suppressed to a small number, and the intermittent rotation cam 60 having a small diameter can be employed. The proof fixed angle rotation device 50 can be miniaturized. Even if the intermittent rotation cam 60 is rotated at a large angle, the rotation angle of the rotating object 52 is converted to be smaller than the rotation angle of the intermittent rotation cam 60 via the gear mechanism. In addition, the rotating object 52 can be rotated with high accuracy.

  As described above, by intermittently rotating the rotation target body 52 by a certain angle, the cam plate 57 at a position facing each micropilot operation unit 21 is provided with a protrusion 57a. The projecting portion 57a comes into contact with the opposing micropilot operating portion 21 so that the micropilot operating portion 21 is turned on, and at the location where the projecting portion 57a is not provided, the facing micropilot operating portion 21 is turned off. Thus, the opening / closing operation of each air valve 22 is switched, and each air actuator 23 connected to each air valve 22 can be operated according to the order of the automatic gas filling process.

  As described above, according to the present invention, the pair of guide pins 59 provided on the slide table 58a that reciprocates in a predetermined linear direction are alternately brought into contact with the inclined surface 60a of the intermittently rotating cam 60, and this guide By pressing the inclined surface 60a with the pin 59, the intermittently rotating cam 60 can be rotated by a fixed angle in a fixed direction, and the guide pin 59 pressing the inclined surface 60a is circularly connected to the guide pin holding surface 60b. By making contact in a wide arc-shaped range, rattling between the guide pin 59 and the intermittent rotation cam 60 is prevented, and the intermittent rotation cam 60 is positioned with respect to the rotation direction. The rotation operation is stopped. As a result, the intermittent rotation cam 60 can be intermittently rotated at a constant angle with high accuracy, and accordingly, the rotating object 52 interlocked with the intermittent rotation cam 60 can be rotated at a constant angle with high accuracy. Can be moved.

  Further, by pressing the inclined surface 60a with the guide pin 59 brought into contact, the intermittently rotating cam 60 is rotated in a direction in which the inclined surface 60a escapes from the guide pin 59. It is possible to prevent a large impact from being generated when rotating, and to suppress the generation of vibration when the explosion-proof constant angle rotating device 50 is operated, thereby improving the durability performance of the explosion-proof constant angle rotating device 50. As well as improved reliability.

  Further, even when the rotation angle of the rotation object 52 is set finely, the intermittent rotation cam 60 may be rotated at a large rotation angle by one movement of the slide table 58a. The number of the inclined surfaces 60a in the moving cam 60 can be reduced to a small number, and the intermittent rotating cam 60 having a small diameter can be adopted, and the explosion-proof constant angle rotating device 50 can be downsized. . Further, even if the intermittent rotation cam 60 is rotated at a large angle, the rotation target body 52 can be easily and accurately rotated because it is subsequently converted to a small rotation angle via a gear mechanism.

It is a figure which shows the explosion-proof type constant angle rotation apparatus of embodiment of this invention. It is a side view of the explosion-proof type constant angle rotating apparatus shown in FIG. It is a BB arrow line view in FIG. It is a figure explaining rotation operation of an intermittent rotation cam. It is a figure which shows the state which an intermittent rotation cam is intermittently rotated by the fixed angle by a fixed angle by a pair of guide pin. It is a figure which shows the example of the shape of a cam board. It is a figure explaining the automatic filling process of the conventional high pressure gas. It is a figure which shows the conventional explosion-proof type air control apparatus. It is a figure explaining the structure by which control air is supplied alternately with PX and PY. It is a figure which shows the example which actualized more the explosion-proof type constant angle rotation apparatus in FIG. It is a side view of the explosion-proof type constant angle rotating device shown in FIG. It is sectional drawing of the AA arrow in FIG. It is a figure explaining the state which the slide table in a 1st slide member slides.

Explanation of symbols

52 Rotating object 58a Slide table 59 Guide pin 60 Intermittently rotating cam 60a Inclined surface

Claims (4)

A reciprocating movement in a predetermined linear direction by the supplied air and a moving body having a pair of protrusions, and the protrusions are disposed from both sides by the reciprocating movement of the moving body disposed between the pair of protrusions. An intermittently rotating cam that is intermittently rotated by a fixed angle in a fixed direction by abutting alternately, and a rotating object that is intermittently rotated in conjunction with the rotating operation of the intermittently rotating cam. The intermittently rotating cam is provided with a plurality of inclined surfaces at certain angles in the circumferential direction that are pressed by the protrusions contacting and further moving to rotate the intermittently rotating cam, The intermittent rotation cam is configured such that when the protrusion pressing the inclined surface reverses the moving direction, the rotation operation is stopped and another inclined surface different from the inclined surface is against the other protrusion. Explosion-proof type fixed angle Rotating device. The gear mechanism which makes the rotation angle of the said rotation object smaller than the rotation angle of the said intermittent rotation cam is interposed between the intermittent rotation cam and the rotation object. The explosion-proof constant-angle rotating device according to 1. The rotating object opens and closes a plurality of air-operated switching valves via a plurality of detection devices that detect the irregularities by means of outer circumferential irregularities, and includes a plurality of air actuators connected to the plurality of air-operated switching valves. The explosion-proof constant angle rotating device according to claim 1 or 2, wherein the explosion-proof constant angle rotating device is operated. An explosion-proof air control device comprising the explosion-proof constant-angle rotating device according to any one of claims 1 to 3.

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