JP2014210331A - Duplex relay unit device for screw fastening machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fulfill the proper function to an arrival of a screw fastening machine, by staying in standby by freely setting an interval of at least two bolts.SOLUTION: In the screw fastening machine 26 installed in a robot device 32, a head part 2 is held and screwed in a screw hole, and a column member 34 standing in the vertical direction is fixed to a slender base member 35, and a relay member 16 is joined to an upper part of the column member 34, and a receiving hole 17 is formed for inserting a shaft part 4, and rotation inhibition means of the shaft part 4 inserted into the receiving hole 17 is provided, and both the relay member 16 and the rotation inhibition means are arranged along the longitudinal direction of the base member 35 on one side of the support member 34, and relay units 90L and 90R are formed of the support member 34, the relay member 16, a pressurizing member 38 and advance-retreat means 36, and at least two relay units 90L and 90R are installed in the base member 35 in a state where the respective column members 34 are adjacent and the respective relay members 16 and the rotation inhibition means extend to the opposite side.

Description

  The present invention relates to a multiple relay unit device for a screw tightening machine that makes a plurality of bolts stand by at an appropriate position with respect to a screw tightening machine operated by a robot apparatus.

  In Japanese Patent No. 4556217, a bolt sent from a parts feeder is inserted into a receiving hole formed in a vertical direction by a supply device, and then the head of the bolt is held by a holding socket of a screw tightening machine. And then screwed into the target screw hole.

Japanese Patent No. 4556217

  The apparatus described in the above-mentioned Patent Document 1 makes one bolt stand by in a vertical posture, and a holding socket of a screw tightener approaches this bolt. By the way, in a screw tightening machine, normally, one bolt is held and screwed into a target location, but in order to improve productivity, it is necessary to hold a plurality of bolts and screw into a plurality of target locations. .

  In such a case, a plurality of bolts are made to wait at a predetermined interval. However, in order to appropriately secure this interval, it is necessary to provide an appropriate structure and function to the bolt standby device, that is, the relay unit device. is there. In particular, special consideration is required when the distance between two bolts is small.

  The present invention has been provided to solve the above-described problems, and is a screw tightening that performs an appropriate function with respect to the arrival of the screw tightening machine by allowing the at least two bolts to freely set and wait. The purpose is to provide a dual relay unit device for a machine.

  According to the first aspect of the present invention, the part to be relayed is a bolt composed of a head and a shaft, and the head is held by a holding socket of a screw tightening machine operated by a robot apparatus and screwed into a screw hole at a target location. A support member is fixed to an elongate base member that moves forward and backward in a horizontal direction in a state where the support member stands in a vertical direction, and a relay member is coupled to an upper portion of the support member, and the relay member is in a vertical direction. In addition, a receiving hole into which the shaft portion is inserted with the head protruding from the surface of the relay member is formed, and a rotation stopping means for stopping the rotation of the shaft portion inserted into the receiving hole is provided, and the rotation stopping means Is composed of a pressure member that pressurizes the shaft part and a forward / backward means for moving the pressure member forward and backward, and both the relay member and the rotation stopping means are arranged along the longitudinal direction of the base member on one side of the column member, Previous A support unit, a relay member, a pressure member, and an advance / retreat means form a relay unit. At least two of the relay units are adjacent to each other, and each of the relay members and the rotation stopping means are opposite to each other. It is attached to the said base member in the state extended in this, It is the multiple relay unit apparatus for screwing machines characterized by the above-mentioned.

  A strut member is fixed to an elongate base member that moves forward and backward in a horizontal direction while standing in a vertical direction. A relay member is coupled to the upper portion of the strut member, and the head is relayed to the relay member in the vertical direction. A receiving hole into which the shaft portion is inserted in a state of protruding from the surface of the member is formed, and a rotation restraining means for restraining the rotation of the shaft portion inserted into the receiving hole is provided, and the rotation restraining means adds the shaft portion. A pressure member to be pressed and a forward / backward means for moving the pressure member back and forth, and both the relay member and the rotation stopping means are arranged along the longitudinal direction of the base member on one side of the column member, and relay with the column member A relay unit is formed by the member, the pressure member, and the advancing / retreating means. At least two of the relay units are adjacent to each support member, and each of the relay members and the rotation stopping means are It is attached to the base member in a state extending on opposite sides.

  Thus, the relay unit is formed in a state in which the relay member, the pressure member, and the advancing / retreating unit are sequentially arranged toward one side of the support member, and at least two relay units are in a state where the support members are back to back. Next to each other. That is, the relay member and the rotation restraining means of each relay unit are attached to the base member in a state where they extend in opposite directions. Therefore, since the space between the adjacent support members is a space, the interval between the receiving holes of the relay members in both relay units can be freely set as necessary. In particular, it is advantageous when the interval between the two receiving holes is narrowed and the bolts are screwed into the narrowly spaced screw holes.

  Furthermore, since the base member is advanced and retracted in the horizontal direction, after inserting the bolt into the first receiving hole, the base member can be moved in the horizontal direction to insert the bolt into the second receiving hole. it can. Therefore, holding a plurality of bolts in each relay unit can be efficiently executed with a simple operation, which is effective for improving productivity.

  A column member is fixed to an elongated base member that moves forward and backward in the horizontal direction while standing in the vertical direction, and a relay member is coupled to the upper portion of the column member to prevent rotation of the shaft portion inserted into the receiving hole. The rotation restraining means is composed of a pressure member that pressurizes the shaft portion and an advance / retreat means that advances and retracts the pressure member, and both the relay member and the rotation restraining means are arranged on one side of the support member along the longitudinal direction of the base member. Has been. With such a configuration, the relay unit and the base member are arranged in a state extending in the same direction, so that it becomes easy to secure an occupied space necessary for the advancing and retreating operation, and a compact device can be achieved.

  The support member is coupled to the base member in the vertical direction, the relay member is attached to the upper portion of the support member in a state of extending to one side of the support member, and the pressurizing member and the advancing / retreating means extend in the same direction as the relay member. ing. Since each member is arranged in such an order, the relay member can be arranged at the highest position when viewed in the vertical direction, and the pressure member and the advance / retreat means can be arranged at a position lower than the surface of the relay member. . Therefore, when the holding socket of the screw tightener approaches the bolt head, the bolt head can be held at the place where the bolt head is most easily held, and the bolt can be securely held by the holding socket.

  A rotation restraining means for restraining the rotation of the shaft portion inserted into the receiving hole is attached to the base member. For this reason, when the holding socket rotates and approaches the head, and the head enters the socket hole of the holding socket relatively, the bolt does not rotate with the holding socket, The head can reliably enter the socket hole. Further, by stopping the rotation of the shaft portion when the base member is turned, it is possible to prevent the bolt from being displaced or dropped in the receiving hole.

  Since the base member becomes a basic member and a plurality of relay units including the relay member and the rotation stopping means are integrated with the base member, a simple structural unit can be secured.

  Since the receiving hole of the relay member is waiting in a state where it is opened in the vertical direction, the shaft portion of the bolt can be inserted into the receiving hole surely by inserting it in the vertical direction, and a reliable supply can be achieved. it can.

  Two relay units can be attached to the base member in a back-to-back state, and another relay unit can be arranged between the two relay units. By carrying out like this, the bolt hold | maintained at a base member can be increased to three or more, and many bolts can be fastened to the target location at once with a screwing machine.

It is the side view and partial top view which show the whole apparatus. It is the front view and partial top view of a relay apparatus. It is a side view which shows a robot apparatus and a standby bolt. It is a top view which shows another Example.

  Next, a mode for carrying out the duplex relay unit device for a screw tightening machine of the present invention will be described.

  1 to 4 show a first embodiment of the present invention.

  First, the relayed bolt will be described.

  The bolt 1 is made of iron, and as shown in FIG. 1C, a regular hexagonal head 2, a circular flange 3 concentric with the head 2, and a shaft 4 coaxial with the flange 3 and formed with a male screw. Is formed by. The dimensions of each part of the bolt 1 are as follows: the diameter of the shaft 4 is 10 mm, the length of the shaft is 27 mm, the diameter and thickness of the flange 3 are 20 mm and 1.5 mm, respectively, and the height of the head 2 is 10 mm. The radial dimensions of 2 are 14 mm and 16 mm. In addition, although it is set as a flange here, it is also possible to make a bolt without a flange into the object of relay.

  Next, the entire apparatus will be described.

  The entire apparatus is denoted by reference numeral 100, and the entire apparatus 100 includes a supply device 200 and a relay device 300.

  Next, the supply device will be described.

  The supply device 200 fulfills the function of inserting the shaft portion 4 of the bolt into a receiving hole (described later) provided in the vertical direction, and uses a supply rod that advances and retracts in the horizontal direction and moves up and down in the vertical direction. Various types such as a robot device having a chuck mechanism for grasping a bolt can be adopted. In this embodiment, the former supply rod is used.

  The supply rod 5 that moves back and forth in a substantially horizontal direction moves back and forth by an air cylinder 6 that is arranged in a substantially horizontal direction. The advancing / retreating axis is indicated by the symbol OO. A locking member 7 is attached to the distal end portion of the supply rod 5, and the bolt 1 is locked in a state where the shaft portion 4 is suspended in the vertical direction, that is, in a hanging state.

  An air cylinder 24 is fixed to the stationary member 8 in order to raise and lower the air cylinder 6 in the vertical direction. The piston rod 25 of the air cylinder 24 advances and retreats in the vertical direction, and the air cylinder 6 is fixed to the upper end thereof.

  A supply pipe 9 fixed to a stationary member 8 such as a machine frame is arranged at an acute angle with respect to the advance / retreat axis OO of the supply rod 5 and is disposed above the air cylinder 6. One end of the supply pipe 9 is connected to a supply hose 10 made of a synthetic resin such as urethane resin, and the supply hose 10 is connected to a parts feeder 11.

  A holding space 12 is formed at the other end of the supply pipe 9, and the bolt 1 delivered from the parts feeder 11 is held in the holding space 12. The holding space 12 is provided with an outlet opening 13 that opens downward, and an advancing / retracting gate member 14 for opening and closing the opening 13 is disposed. The gate member 14 is formed of a plate-like member, and the bolt 1 is stopped in the holding space 12 by closing the outlet opening 13.

  As described above, the gate member 14 is formed of a flat thick plate, and opens and closes the outlet opening 13 by moving back and forth. As shown in FIG. 1B, an arm member 19 is protruded from a coupling member 18 for fixing the supply pipe 9 to the stationary member 8, and an air cylinder 20 is fixed thereto. The piston rod 21 of the air cylinder 20 advances and retreats in a direction that is perpendicular to the advance / retreat axis OO, and a gate member 14 is fixed to the tip thereof. In the gate member 14, the position indicated by the solid line in FIG. 1B is the position where the outlet opening 13 is opened, and the position indicated by the chain line in FIG. 1 is the position where the outlet opening 13 is closed. Therefore, when the gate member 14 opens the outlet opening 13, the bolt 1 falls.

  The locking member 7 is formed with a notch 15 that is opened in the advancing direction of the supply rod 5, and the flange 3 is seated on the upper surface of the locking member 7 as shown in FIG. 4 hangs down through the notch 15 in a vertical posture. That is, it is locked in a suspended state. At this time, the displacement of the bolt 1 or the like does not occur due to the attractive force of the permanent magnet 23 embedded in the locking member 7. As described above, when the gate member 14 opens the outlet opening 13, the bolt 1 falls and a so-called neck hanging state is established.

  A relay member 16 is disposed in a relay device 300 described later, and a receiving hole 17 that opens upward is opened in the vertical direction. The diameter of the receiving hole 17 is set to be slightly larger than the diameter of the shaft portion 4 and is 11 mm here.

  Next, the operation of the supply device will be described.

  When the bolt 1 is locked to the locking member 7, the supply rod 5 is advanced by the air cylinder 6, and the shaft portion 4 is coaxial with the receiving hole 17 as shown by a two-dot chain line in FIG. Stop at the position. Thereafter, the shaft portion 4 is inserted into the receiving hole 17 by the air cylinder 24 being contracted. By reversing the supply rod 5 during the insertion, the shaft portion 4 remains in the receiving hole 17, and then enters the receiving hole 17 due to the weight of the bolt 1, and the flange 3 becomes the surface 22 of the relay member 16. Is seated and insertion is complete. The center line in the vertical direction of the shaft portion 4 in the state where the insertion has been completed is indicated by reference symbols YY. And this center line YY is orthogonal to the advancing / retreating direction of the below-mentioned base member 35.

  Next, the screw tightening machine will be described.

  The screw tightening machine 26 here is constituted by a holding socket 28 provided with a regular hexagonal socket hole 27 and a rotation driving means 29 for rotating the holding socket 28. As the rotation driving means 29, it is optimal to use an electric motor with a built-in reduction gear. Reference numeral 29 denotes an electric motor. A holding socket 28 is fixed to the rotation output shaft 30. The holding socket 28 moves toward the head 1 in a state where the rotation axis of the holding socket 28 and the axis of the bolt 1 coincide with each other. Although not shown, a permanent magnet is embedded in the socket hole 27 in order to prevent the bolt 1 from dropping.

  When the holding socket 28 moves while rotating and comes into contact with the head 2, the head 2 relatively fits into the socket hole 27 relatively closely. The electric motor 29 is fixed to the coupling bracket 31, and the distal end portion of the robot device 32 is fixed to the outer surface of the coupling bracket 31. The robot device 32 is generally used, and is a normal 6-axis type.

  Next, the relay unit will be described.

  The relay device 300 holds the bolts 1 at predetermined intervals in each of a plurality of relay units described later, and waits for the screwing machine 26 to arrive. The relay unit shown in FIGS. 2 and 3 is of a type in which two units are paired with a left unit indicated by reference numeral 90L and a right unit indicated by reference numeral 90R. Since both the relay units 90L and 90R are the same mechanism that is left-right symmetric, in the following description, the left-side relay unit 90L will be described.

  An elongated base member 35 that moves back and forth in the horizontal direction is formed of an elongated plate material having a substantially rectangular parallelepiped shape. The column member 34 is fixed to the upper surface of the base member 35 by welding or bolting while standing upright in the vertical direction. The support member 34 is also preferably formed of a substantially rectangular parallelepiped thick plate.

  As shown in FIG. 2 (A), the relay member 16 includes a block-shaped main body portion 33 that is substantially in the shape of a rectangular parallelepiped, and an enlarged portion 41 in which the lower side of the main body portion 33 is cut out to slightly reduce the thickness. As shown in FIG. 1A, the receiving hole 17 is opened in the vertical direction in the standby state. And the upper surface of the main-body part 33 and the upper surface of the enlarged part 41 are made into the flat surface 22 which continued. The relay member 16 is integrated on one side of the support member 34, that is, on the left side of FIG. In addition, the part which notched the lower side of the main-body part 33 is shown as the notch part 42. FIG.

  The receiving hole 17 of the relay member 16 is opened in the vicinity of the boundary between the main body portion 33 and the enlarged portion 41, and the pressing member 38 passes through the enlarged portion 41 and is exposed to the lower side. It can be pressed. The shaft portion 4 thus pressed is sandwiched between the inner wall 40 of the main body portion 33.

  In order to prevent the head 2 from being rotated by the holding socket 28 when the holding socket 28 contacts the head 2 while rotating, a rotation stopping means is provided. As a specific structure of the rotation restraining means, various types such as a form in which the shaft part 4 is pressurized and a form in which a magnet attracting force is applied to the shaft part 4 can be adopted. Here, the former pressurization method is used.

  A pressure member 38 made of a thick plate member is coupled to a piston rod 37 of an air cylinder 36 fixed to the base member 35. An arcuate recess 39 that matches the shaft portion 4 is formed at the tip of the pressure member 38. The advancing / retreating direction of the pressure member 38 is orthogonal to the axis of the shaft portion 4, and when the pressure member 38 is advanced by the air cylinder 36, as shown by a two-dot chain line in FIG. The shaft portion 4 is pressurized in a state in which the arc-shaped concave portion 39 is aligned with the shaft portion 4 protruding downward from the receiving hole 17 and exposed. This pressurization is performed by sandwiching the shaft portion 4 between the arc-shaped concave portion 39 and the inner wall 40 of the main body portion 33. As a result, the rotation of the bolt 1 is stopped. The space required for the advancement / retraction of the pressure member 38 is formed below the relay member 16 by forming the notch 42.

  In addition, the shaft part 4 pressed as described above is in a state of being coaxial with the center line Y-Y, and the bolt axis line is not inclined in the rotation restrained state. For this purpose, the receiving hole 17 is opened so that the outer peripheral surface of the shaft portion 4 inserted therein contacts the surface of the inner wall 40. In this way, the axis of the socket hole 27 and the axis of the bolt 1 inserted into the receiving hole 17 are coaxial, and the head 2 reliably enters the socket hole 27.

  The pressurizing force can be secured by a pressurizing means such as an air cylinder or an advance / retreat output type electric motor. Here, the air cylinder 36 is used as described above. As is clear from the above-described configuration, the rotation stopping means is specifically constituted by an air cylinder 36, a piston rod 37, a pressurizing member 38, an arc-shaped recess 39, an inner wall 40, and the like.

  As described above, the relay unit 90 </ b> L includes the support member 34 erected from the base member 35, the relay member 16 extending to the left from the upper part of the support member 34, the receiving hole 17 opened in the relay member 16, The pressure member 38 is configured to advance / retreat the lower side of the enlarged portion 41, and the advancing / retreating unit 36 configured to advance / retreat the pressure member 38.

  The width W1 of the base member 35 is the same as the maximum width W2 of the relay unit 90L, or W1> W2. By doing so, it is possible to eliminate a member protruding in a direction orthogonal to the advancing / retreating direction of the base member 35, reducing the advancing / retreating space of the relay units 90L and 90R, and effectively reducing the size of the apparatus.

  In the relay unit 90 </ b> L, the relay member 16, the pressure member 38, the air cylinder 36, and the like extend to the left of the column member 34 with the column member 34 as a starting point. On the other hand, in the relay unit 90R on the right side, the relay member 16, the pressure member 38, the air cylinder 36, and the like extend to the right of the column member 34 with the column member 34 as a starting point. With this arrangement, the support members 34 and 34 of both relay units 90L and 90R are adjacent to each other in a back-to-back state. That is, the relay member 16, the pressurizing member 38, the air cylinder 36, etc. of each relay unit 90 </ b> L, 90 </ b> R are attached to the base member 35 in a state of extending to the opposite side. Therefore, there is a space between the adjacent strut members 34, 34.

  As described above, it is possible to select the interval between the arranged relay units 90L and 90R to a predetermined value by utilizing the space between the adjacent column members 34 and 34. Thereby, the interval L between the receiving holes 17 and 17 of both the relay units 90L and 90R is set to a predetermined value. For example, when the door hinge fitting of the refrigerator is fixed with two bolts, the interval L is set according to the interval between the two bolts.

  The screwing machine 26 shown in FIG. 3 is used for two bolts 1 having a distance L of 45 mm. The coupling bracket 31 has a box shape, and two electric motors 29 serving as rotational driving means are attached thereto. The other structure is the same as that shown in FIG. The distance between the centers of the socket holes 27 is 45 mm, which is the same as the distance L described above. When the two heads 2 are fitted in the socket holes 27 by the operation of the robot apparatus 32, the robot apparatus 32 is screwed into the screw holes of the hinge fitting for doors of the refrigerator described above, for example. In the case shown in FIG. 3, since the bolt dimensions are as described above, both strut members 34 and 34 are made as close as possible in order to set the distance L to 45 mm.

  Next, the advancing and retracting structure of the base member will be described.

  As a mechanism for moving the base member 35 back and forth in the horizontal direction, various mechanisms such as a mechanism using a rack and pinion mechanism, a mechanism using an advancing / retracting output type electric motor, a mechanism using an air cylinder can be adopted. Here, it is a case of an air cylinder.

  As shown in FIG. 2, an air cylinder 43 that outputs advancing and retracting in the horizontal direction is fixed on the stationary member 8. A base member 35 is disposed on the upper side of the air cylinder 43, and a slide mechanism 48 is interposed between the upper side of the air cylinder 43 and the base member 35. Here, it is a general slide mechanism. The slider 44 is fixed on the upper side of the air cylinder 43, the slide groove 45 is formed on the lower side of the base member 35, and the slider 44 is fitted in a state in which the slider 44 can slide in the slide groove 45. It is. Therefore, the base member 35 can advance and retract in the horizontal direction on the upper side of the air cylinder 43.

  The tip of the piston rod 46 of the air cylinder 43 is coupled to a bracket 47 fixed to the base member 35. Therefore, the base member 35 is advanced and retracted by the output of the air cylinder 43.

  Next, the bolt supply operation to the relay unit will be described.

  In FIG. 2A, description will be made assuming that the bolt 1 is not inserted. This figure shows a state in which the air cylinder 43 is fully extended, and the relay unit 90R is stopped to the leftmost side. At this time, the pressure member 38 is retracted. At the same time, the relay unit 90L is also stopped at the leftmost side, and the pressing member 38 is also retracted.

  Here, the locking member 7 of the supply device 200 advances with the bolt 1 suspended, stops on the center line Y-Y, and then the locking member 7 descends in the vertical direction so that the shaft portion 4 receives the receiving hole 17. Inserted into. Thereafter, the pressing member 38 advances to stop the rotation of the bolt 1. At the same time as or after the insertion, the locking member 7 is retracted.

  When the bolt is supplied to the right relay unit 90R in this way, the air cylinder 43 performs a reduction operation by the length of the interval L this time. As a result, the relay unit 90L on the left side stops on the center line YY, and another bolt 1 is supplied to the relay unit 90L in the same manner as the previous operation. Thereafter, the pressing member 38 advances to stop the rotation of the bolt 1.

  When the bolt 1 is supplied to both the relay units 90R and 90L in this way, the screw tightening machine 26 as shown in FIG. 3 moves forward, holds the two bolts in the holding socket 28, and goes to the target location. It moves and is screwed.

  FIG. 4A is a simplified plan view showing a modified example. In this configuration, another relay unit 90N is arranged between the relay units 90R and 90L, and by doing so, the three receiving holes 17 are arranged in a straight line at equal intervals L, that is, the advancing and retreating direction of the base member 35. It is lined up on the line. The structure of the relay unit 90N is the same as that of the relay units 90L and 90R.

  In order to perform such a relay unit arrangement, a projecting base member 49 is provided at the center of the elongated base member 35, and the relay unit 90N is arranged in a direction orthogonal to the other relay units 90L and 90R. .

  FIG. 4B is a simplified plan view showing another modified example. This figure shows the positions of the three receiving holes 17, and the position of the relay unit 90N in FIG. Therefore, connecting the center points of the three receiving holes 17 forms an isosceles triangle. When the bolt 1 is supplied to the central receiving hole 17, the operation is controlled so that the advance stroke of the supply rod 5 of the supply device 200 is shortened.

  Instead of the various air cylinders described above, an electric motor that performs forward / backward output can also be employed. It is also possible to replace the permanent magnet with an electromagnet. In addition, illustration of the air hose attached to each air cylinder in the drawing is omitted.

  The advancing / retreating operation of the supply rod, the operation of the parts feeder, the operation of each air cylinder, the operation of the robot apparatus, etc. can be easily performed by a generally adopted control method. The above-mentioned predetermined operation can be ensured by combining an air switching valve that operates with a signal from the control device or the sequence circuit, a sensor that emits a signal at a predetermined position of the air cylinder, and transmits the signal to the control device. .

  The operational effects of the first embodiment described above are as follows.

  A column member 34 is fixed to an elongate base member 35 that moves forward and backward in the horizontal direction in a state of standing vertically, and the relay member 16 is coupled to the upper portion of the column member 34, and the relay member 16 is in the vertical direction. A receiving hole 17 into which the shaft portion 4 is inserted is formed in a state where the head 2 protrudes from the surface 22 of the relay member 16, and a rotation stopping means for stopping the rotation of the shaft portion 4 inserted into the receiving hole 17 is provided. The rotation restraining means includes a pressurizing member 38 for pressurizing the shaft portion 4 and an advancing / retracting means 36 for advancing and retracting the pressurizing member 38. The relay units 90L and 90R are formed by the column member 34, the relay member 16, the pressurizing member 38, and the advance / retreat means 36, and at least two relay units 90L and 9R are arranged along the longitudinal direction. With R are adjacent each of the strut members 34 is attached to the base member 35 in a state in which each of the relay member 16 and rotating restraining means extending to the opposite side.

  As described above, the relay units 90L and 90R are formed in a state where the relay member 16, the pressure member 38, and the air cylinder 36 are sequentially arranged toward one side of the support member 34, and at least two relay units 90L and 90R are formed. Are adjacent to each other in a back-to-back state. That is, the relay member 16 and the rotation stopping means of each of the relay units 90L and 90R are attached to the base member 35 in a state of extending to the opposite side. Therefore, since there is a space between the adjacent strut members 34, the interval between the receiving holes 17 of the relay member 16 in both relay units 90L and 90R can be freely set as necessary. In particular, it is convenient when the interval L between the receiving holes 17 and 17 is narrowed and the bolt 1 is screwed into the screw holes with the narrow interval L.

  Further, since the base member 35 advances and retreats in the horizontal direction, after the bolt 1 is inserted into the first receiving hole 17, the base member 35 is moved in the horizontal direction and the bolt is inserted into the second receiving hole 17. 1 can be inserted. Therefore, holding the plurality of bolts 1 in the relay units 90L and 90R can be efficiently executed with a simple operation, which is effective for improving productivity.

  A column member 34 is fixed to an elongated base member 35 that moves forward and backward in a horizontal direction in a state of standing vertically, and a relay member 16 is coupled to an upper portion of the column member 34, and a shaft portion that is inserted into the receiving hole 17. 4 is constituted by a pressurizing member 38 that pressurizes the shaft portion 4 and an air cylinder 36 that advances and retracts the pressurizing member 38, and both the relay member 16 and the rotation restraining means are support members 34. It is arranged along the longitudinal direction of the base member 35 on one side. With such a configuration, since the relay units 90L and 90R and the base member 35 are arranged in the same direction, it is easy to secure an occupied space necessary for the advance / retreat operation, and a compact device can be achieved. .

  The support member 34 is coupled to the base member 35 in the vertical direction, and the relay member 16 is attached to the upper portion of the support member 34 in a state of extending to one side of the support member 34, and the pressurizing member 38 and the advance / retreat means 36 are connected to the relay member 16. The arrangement extends in the same direction. Since the members are arranged in this order, the relay member 16 is arranged at the highest position when viewed in the vertical direction, and the pressurizing member 38 and the advance / retreat means 36 are arranged at a position lower than the surface 22 of the relay member 16. Can be arranged. Therefore, when the holding socket 28 of the screw tightener 26 approaches the bolt head 2, it is possible to securely hold the bolt in the holding socket 28 by waiting at a position where the bolt head 2 is most easily held. it can.

  A rotation restraining means for restraining the rotation of the shaft portion 4 inserted into the receiving hole 17 is attached to the base member 35. For this reason, when the holding socket 28 rotates and approaches the head 2, and the head 2 enters the socket hole 27 of the holding socket 28 relatively, the bolt 1 is supplied together with the holding socket 28. The head 2 can reliably enter the socket hole 27 without turning around. Further, by stopping the rotation of the shaft portion 4 when the base member 35 is turned, it is possible to prevent the bolt 1 from being displaced or dropped out in the receiving hole 17.

  Since the base member 35 is a basic member and a plurality of relay units 90L and 90R including the relay member 16 and rotation restraining means are integrated with the base member, a simple structural unit can be secured.

  Since the receiving hole 17 of the relay member 16 stands by in a state where it is opened in the vertical direction, the shaft portion 4 of the bolt 1 can be reliably inserted into the receiving hole 17 by inserting it in the vertical direction. High quality supply.

  The two relay units 90L and 90R can be attached to the base member 35 in a state of being back to back, and another relay unit 90N can be disposed between the two relay units 90L and 90R. By doing so, the number of bolts 1 held by the base member 35 can be increased to three or more, and a large number of bolts 1 can be tightened to a target location at once by a screw tightening machine.

  When the receiving hole 17 faces in the vertical direction and waits for insertion of the bolt 1, the surface 22 of the relay member 16 is positioned at the highest position. By doing so, the entry from the tip of the shaft portion 4 to the receiving hole 17 is surely started, and a highly reliable insertion can be ensured. Therefore, the main body 33 of the relay member 16 is positioned at a position one step higher than the air cylinder 36, and the surface 22 is disposed at the highest position accordingly.

  A space is formed on the lower side of the relay member 16 by notching the lower side of the relay member 16 (notch portion 42), and the pressurizing member 38 can be moved forward and backward in this space. Therefore, the surface 22 of the relay member 16 is positioned at the highest position, and the pressing member 38 that is a movable member is present at a position lower than the surface 22. Therefore, when the holding socket 28 approaches the bolt head 2, the bolt head 2 enters the socket hole 27 relatively first, and the head is reliably held.

  As described above, according to the present invention, a duplex relay unit device for a screw tightening machine that performs an appropriate function with respect to the arrival of the screw tightening machine by freely setting an interval between at least two bolts and waiting. . Accordingly, the present invention can be used in a wide range of industrial fields such as an automobile body assembly process and a home appliance assembly process.

DESCRIPTION OF SYMBOLS 100 Whole apparatus 200 Supply apparatus 300 Relay apparatus 1 Bolt 2 Head 4 Shaft part 5 Supply rod 6 Air cylinder 7 Locking member 8 Stationary member 16 Relay member 17 Receiving hole 22 Surface 26 Screwing machine 27 Socket hole 28 Holding socket 29 Rotation Drive means, electric motor 32 Robot device 34 Prop member 35 Base member 36 Air cylinder, advance / retreat means 38 Pressure member 43 Air cylinder 90L Relay unit 90R Relay unit

Claims (1)

  The parts to be relayed are bolts consisting of a head and a shaft, and the head is held by a holding socket of a screw tightener operated by a robot device and screwed into a screw hole at a target location. A strut member is fixed to an elongate base member that moves up and down in a vertically standing state, and a relay member is coupled to the upper portion of the strut member. The relay member is perpendicular to the head and the head is the surface of the relay member. A receiving hole into which the shaft portion is inserted in a state of protruding from the shaft is formed, and rotation stopping means for stopping rotation of the shaft portion inserted into the receiving hole is provided, and the rotation stopping means is a pressurizing member that pressurizes the shaft portion. A member and an advancing / retreating means for advancing and retreating the pressure member, and both the relay member and the rotation stopping means are arranged along the longitudinal direction of the base member on one side of the column member, and the column member and the relay member A relay unit is formed by the pressure member and the advancing / retreating means, and at least two of the relay units have the column members adjacent to each other, and each of the relay members and the rotation stopping means extend in the opposite side. A duplex relay unit device for a screw tightening machine, characterized in that it is attached to a member.

Images