JPS6283914A - Synchronous conveying apparatus - Google Patents

Abstract

PURPOSE:To reduce the size of a conveying apparatus by synchronizing the approaching and separating movement of a moving frame, the axial movement of both cams and the operation of a clamp mechanism by the first guide bar rotated by a single rotation driving source. CONSTITUTION:A cam member 117 and the third cam 146 are rotated with the first guide bar 101 by operation of a motor 104. Both arms 107, 108 are moved by the first link mechanism 123 operated according to the first cam 121, and a driving rod is moved relatively to the arms by the second link mechanism 124 operated according to the second cam 122, thereby to operate a clamp mechanism 112. Further, both moving frames 105, 106 are brought close and separated to and from each other by the third link mechanism 147 operated according to the third cam 146. Thus, the whole mechanisms are synchronized by the first guide bar 101 to eliminate the need of plural driving sources, which results in reducing an apparatus in size.

Description

[Detailed description of the invention] A2 Objective of the invention (1) Industrial application field
The present invention relates to a synchronous conveyance device for synchronously conveying these in the approaching and separating directions and in a direction orthogonal to the approaching and separating directions.

(2) Prior Art Conventionally, such synchronous conveyance devices generally use robots or drive devices such as cylinders and motors for each linear conveyance direction.

(3) Problems to be Solved by the Invention In the above-mentioned conventional device, the device is large and expensive.

The present invention has been made in view of the above circumstances, and 1.
Same H of a pair of workpieces by operation of a single drive source! gli
The object of the present invention is to provide a synchronous conveyance device that is compact and inexpensive.

B0 Structure of the invention (1) Means for solving the problem The device of the present invention includes:
The first one is placed parallel to the approaching and separating directions of both workpieces.
and a second guide bar; a pair of moving frames movably supported by the first and second guide bars; an arm to be supported; a clamp mechanism provided at the tip of each arm so as to be capable of gripping and releasing the grip of each work; mounted on the first guide bar while preventing relative rotation between the respective disposed drive rods and the first guide bar and relative movement with each moving frame along the longitudinal direction of the first guide bar; a pair of cam members having first and second cams; each disposed between the first cam and the arm;
a first link mechanism for moving the arm in its longitudinal direction in response to rotation of the cam member; a first link mechanism disposed between the second cam and the drive rod; a second link mechanism for relative movement to the first guide bar; a third cam fixed to the first guide bar; a third cam disposed between the third cam and the moving frames;
a third link mechanism for moving both moving frames toward and away from each other along the first and second guide bars in response to rotation of the third cam; a rotational drive source connected to the first guide bars;
including.

(2) Operation The cam member and the third cam rotate together with the first guide bar by the operation of the rotational drive source. others.

Therefore, a first link mechanism that operates according to the profile of the first cam moves both arms in the longitudinal direction, and a second link mechanism that operates according to the profile of the second cam moves the drive rod relative to the arm. The clamp mechanism is actuated by the movement, and the two moving frames are moved closer to each other and separated by a third link mechanism which is actuated according to the profile of the third cam. Therefore, gripping, approaching, moving away from the workpieces, moving the workpieces in a direction perpendicular to the approaching and separating directions, and gripping and releasing the workpieces are performed synchronously.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, a supply mechanism 2 is mounted on a base 1,
A friction welding machine 3 and a boring device 4 are arranged in parallel in the horizontal direction with an interval between them. Furthermore, a synchronous conveyance device 5 is disposed on one side of the base 1 along the arrangement direction, and a conveyance mechanism 6 is disposed on the other side.

This device includes a pair of rod-shaped workpieces having at least a partially rod-like shape, for example, as shown in FIG.
The workpiece W2 is friction welded to form a bar 9 as shown in Fig. 2, and then the bulge 10 formed on the bar 9 is removed and the internal combustion engine is assembled as shown in Fig. 2 (tel). exhaust valve j
1 is manufactured.

The supply mechanism 2 supplies the first and second workpieces Wl and W2 facing each other on the same axis, and includes a first hopper 12 that stores the first workpiece W1 and a first hopper 12 that stores the second workpiece W2. A second hopper 13 is provided. The first hopper 12 is formed in the shape of a rectangular box with an open top, and the bottom thereof is formed to slope downward toward one side in the longitudinal direction (the upper side in FIG. 1). For this reason,
The first workpiece W1 in the first hofuba 12 is
Move from one side to the other. Moreover, a hole 14 is provided at the bottom of one end of the first hopper 12 to allow only one first workpiece W1 to fall, and a guide member perpendicular to the longitudinal direction of the first hopper 12 is provided below the hole 14. 15 are arranged horizontally.

The first workpiece W1 can slide on the guide member 15,
At one end of the guide member 15 on the second hopper 13 side, a holding portion 16 that protrudes and can hold the first workpiece W1 horizontally is provided.
is provided. Further, an extrusion cylinder 17 is arranged horizontally at the other end of the guide member 15, and this extrusion cylinder 17 can slide the first workpiece W1 on the guide member 15 and extrude it to the holding part 16. can.

The second hopper 13 is connected to a holding part 19 via a chute 18, and this holding part 19 is placed on the base 1 with a space between it and the holding part 16. 2nd work W
2 passes from the second hopper 13 through the chute 18 to the holding part 1
9, and in this holding part 19, the second
The workpiece W2 is held with its rod-shaped portion 7 facing the first workpiece W1 on the same axis.

In FIG. 3, the friction welding machine 3 includes a spindle 20 that fixedly grips the first workpiece W1 and moves the first workpiece W1 in the axial direction while rotating it around the axis.
and a chuck mechanism 21 that fixedly grips the second workpiece W2 on the same axis as the first workpiece W1.

A rail 22 is laid on the base 1 in parallel with the axis of the first workpiece W1 held in the supply mechanism 2, and a movable table 23 is movably mounted on the rail 2-2. Moreover, the bracket 24 provided at the end of the base 1
A moving cylinder 25 having an axis along the moving direction of the moving table 23 on the rail 22 is supported and fixed,
A piston rod 2G of this moving cylinder 25 is connected to the moving table 23. Therefore, the moving table 23 moves on the rail 22 by the expansion and contraction operation of the moving cylinder 25.

The spindle 20 is rotatably supported around a horizontal axis by a bearing member 27 fixed on the moving table 23 . Further, a support base 28 is fixed to the movable base 23 so as to be located above the bearing member 27.
A motor 29 is fixed and supported on top. Rotational driving force is transmitted from this motor 29 to the spindle 20 via a transmission belt 30 and the like.

In FIG. 4, the bearing member 27 is
A workpiece gripping mechanism 32 is disposed on the spindle 20, which is rotatably supported by the spindle 20, and is capable of switching between a state of gripping the first workpiece W1 and a state of releasing the gripping state.

The workpiece gripping mechanism 32 includes a holder 33 fixed to the tip of the spindle 20, a collet 34 fitted into the holder 33, and a drive means 3 for driving the collet 34.
5.

The spindle 20 has a hole 36 concentrically open on the tip side, and a holder 33 is fixed to the tip edge of the hole 36. Moreover, a mounting hole 37 is provided in the holder 33 concentrically with the hole 36, and a tapered pressing surface 38 is provided on the inner surface of the distal end of the mounting hole 37, the diameter of which increases toward the distal end.

The collet 34 is fitted into the mounting hole 37 of the holder 33 so as to be movable in the axial direction. Moreover, a tapered pressure receiving surface 39 corresponding to the pressing surface 38 of the holder 33 is provided on the outer circumferential surface of the distal end side of the collet 34 . Further, the collet 34 is provided with an insertion hole 40 concentrically for inserting the first workpiece W1, and furthermore, a plurality of slits 41 extending in the axial direction are provided in a portion near the tip of the collet 34 in the circumferential direction and the direction. The collets 34 are provided at intervals, and the inner diameter of the collets 34 can be expanded and contracted. Therefore, when the collet 34 is moved inward in the axial direction with the first work W1 inserted into the insertion hole 40, the pressure receiving surface 39 is pressed against the pressing surface 38, the diameter of the collet 34 is reduced, and the first work W1 is fixedly held by the collet 34. On the contrary, when the collet 34 is moved outward in the axial direction, the gripping state of the first workpiece W1 by the collet 34 is released as the pressure receiving surface 39 separates from the pressing surface 38.

A support member 42 for supporting the end of the first workpiece W1 is fitted into the insertion hole 40. Further, the rear end of the collet 34 is engaged with an engaging pawl 44 provided on the distal end side of the drive rod 43, and this engaging pawl 44 maintains the state in which the support member 42 is fitted into the insertion hole 40. Ru. Furthermore, the length of this support member 42 is determined in accordance with the first workpiece W1, and the first workpiece W1 is inserted into the insertion hole 40 until it comes into contact with the support member 42.

The driving means 35 includes the driving rod 43, a regulating member 45 that regulates the amount of movement of the engaging claw 44 and the driving rod 43, and a coiled spring 46 interposed between the regulating member 45 and the driving rod 43. A moving table 23 having the same axis as the spindle 20
and a drive cylinder 47 (see FIG. 3) disposed above.

The regulating member 45 is formed into a bottomed cylindrical shape with a through hole 48 at its closed end, and is fitted into the hole 36 of the spindle 20 so that its open end is connected to the holder 33 . The drive rod 43 is housed in the hole 36 concentrically and movably in the axial direction, and one end of the drive rod 43 movably passes through the through hole 48 and enters the regulating member 45 . Moreover, the engaging claw 44 at one end of the drive rod 43 is engaged with the collet 34 within the regulating member 45 and is also slidably engaged with the inner surface of the regulating member 45, so that the axial movement of the engaging claw 44, that is, the collet 34, is The engagement claw 44 is regulated within a range where the luminous intensity is applied to the closed end of the regulating member 45 and the holder 33 .

The movable amount of the engaging claw 44 and the collet 34, that is, the axial length of the regulating member 45, is such that the collet 34 moves inward in the axial direction until it securely grips the first workpiece Wl having a set constant diameter. A gap 49 is formed between the engaging claw 44 and the closed end of the regulating member 45 when the diameter is reduced.

That is, when the outer diameter of the first workpiece W1 is smaller than the set value and a pressing force is applied to the first workpiece W1 from the outside in the axial direction, the collet is pressed until the first workpiece W1 comes into pressure contact with the inner surface of the insertion hole 40. The collet 34 and the drive rod 43 of the drive means 35 are connected so that the collet 34 can move axially inward and contract its diameter.

A collar 51 is fixed to the other end of the drive rod 43, and a spring 46 surrounds the drive rod 43, and the regulating member 45
and the collar 51. The spring force of the spring 46 urges the drive rod 43 to draw the collet 34 axially inward.

The piston rod 52 of the drive cylinder 47 is connected to the spindle 2
The piston rod 52 is inserted concentrically into the piston rod 52.
The enlarged part 53 provided at the tip of the drive rod 43 is inserted into the hole 36.
Coaxially facing the other end. In addition, a spring 54 is compressed between the enlarged portion 53 and the spindle 20, and the piston loft 52 is moved around the drive rod 4 by the spring force of the spring 54.
3 in the direction of contact.

In the extended state of the drive cylinder 47, the piston rod 52
As a result, the drive rod 43 is moved to the left side in FIG. When pulled toward the drive cylinder 47, the drive rod 43 moves to the right in FIG. 4 due to the spring force of the spring 46.

The chuck mechanism 21 is conventionally well-known, and a detailed description thereof will be omitted. It is fixedly held by the chuck mechanism 21 so as to face the.

In FIG. 5, the boring device 4 includes a push-out mechanism 56 for gripping and pressing the first workpiece Wl side of the bar 9;
A die 5 that slidably holds the second workpiece W2 side of the bar 9
7, and is arranged on the opposite side of the supply mechanism 2 with respect to the friction welding machine 3.

The extrusion mechanism 56 includes a guide member 58 for fitting the first work w1 side of the bar 9, and a pressing means for applying an impactful pressing force to the end face of the bar 9 fitted into the guide member 58. 59.

The guide member 58 has a concentric insertion hole 60 into which the bar 9 is inserted, and is connected to the guide holder 61 by a port 62. Further, this guide holder 61 is attached to the spindle 6
3 by a bolt 64. The spindle 63
is supported movably in the axial direction by a support 65 (see FIG. 1) on the base 1.

An insertion hole 6 is provided between the guide member 58 and the guide holder 61.
A member 66 is held as a receiver for abutting and receiving the end of the +11- material 9 inserted into the member 6.

The pressing means 59 has a small-diameter ejection hole 67 formed in the member 66, a passage 68 formed in the guide holder 61 in communication with the ejection hole 67, and guides a pressurized fluid such as pressurized air. a passage 69 concentrically bored in the spindle 63;
It consists of an on-off valve 70 interposed between the passages 68 and 69.

The on-off valve 70 is configured by housing a spherical valve body 71 and a spring 72 that biases the valve body 71 in the valve closing direction in a valve chamber 73. The valve chamber 73 is defined by the guide holder 61 and a valve hole member 75 fixed to the guide holder 61 by a port 74.

Moreover, the valve chamber 73 communicates with the passage 68, and the valve hole member 75 is provided with a valve hole 76 that communicates with the passage 69 in the spindle 63. The valve body 71 is pushed into the valve hole 7 by the spring 72 in the valve chamber 73.
6, and when the force in the valve opening direction acting on the valve body 71 by the air pressure on the passage 69 side overcomes the force in the valve closing direction by the spring 72, the valve body 7I operates to open the valve. However, air pressure suddenly acts on the end surface of the bar 9 that is in contact with the member 66, and the bar 9 is pushed out along the guide member 58 with an impact.

Referring also to FIG. 6, the die 57 holds the bar 9 on the second workpiece W2 side in an openable and closable manner, and is constituted by a pair of roughly semicircular goo pieces 78 and 79. These die pieces 78 and 79 are fixed to swinging members 80 and 81, and the bases of the swinging members 80 and 81 are rotatably supported on a support frame 82 with an axis parallel to the bar 9. axis 83.8
Fixed to 4. The support frame 82 is fixedly disposed on the base 1 with the friction welding machine 3 side open, and both die pieces 78.7 are disposed on the extrusion mechanism 56 side of the support frame 82.
An opening 85 is provided in which 9 is accommodated in a manner that allows opening and closing operations thereof. Further, on the inner edges of the goo pieces 78 and 79, protrusions 86 and 87 with semicircular cross sections that cooperate to form a cylindrical shape are provided to protrude toward the extrusion mechanism 56 side, and these protrusions 8
A receiving surface 8B for receiving the burr 10 of the bar 9 is provided at the tip of each of the rods 6 and 87, respectively.

The shafts 83 , 84 are respectively supported in the support frame 82 on the side opposite the friction welder 3 with respect to the die 57 , so that both die pieces 78 , 79 can be opened on the side of the friction welder 3 and attached to the support frame 82 . is supported by.

On the side of the support frame 82 opposite to the friction welding machine 3, there is an opening/closing cylinder 90 extending horizontally and perpendicular to both shafts 83 and 84.
is supported and fixed, and the piston rod 91 of this opening/closing cylinder 90 is thrust into the support frame 82. Moreover, one end of connecting rods 93.94 is connected to the tip of the piston rod 91 via a shaft 92 parallel to the shafts 83.84, and the other ends of these connecting rods 93.94 are fixed to the shafts 83, 84. be done. Therefore, the goo pieces 78 and 79 are opened in response to the extension operation of the opening and closing cylinder 90, and the goo pieces 78 and 79 are closed in response to the contraction operation of the opening and closing cylinder 90.

Inside the support frame 82, a guide tube 95 for guiding the bar 9 from which the streamer 10 has been removed, that is, the exhaust valve 11, is fixedly disposed so as to be continuous with the die 57.
The external open end of 5 is connected to a chute 96 (see FIG. 1).

In FIG. 7, the synchronous conveyance device 5 moves the first and second workpieces Wl and W2, which are held facing each other on the same axis by the holding part 16.19 of the supply mechanism 2, between the supply mechanism 2 and the friction welding machine 3. It is arranged to carry the same wI. That is, the first and second works Wl.

W2 is a proximity direction 98 that is close to each other on the same axis;
A parallel conveyance direction 99 that is perpendicular to the approaching direction 98 and a separation direction 10 that is orthogonal to the parallel conveyance direction 99 and separate from each other.
0 and are synchronously transported from the supply mechanism 2 to the friction welding machine 3 by the synchronous transport device 5.

This same! The tII conveyance device 5 includes first and second guide bars 101 parallel to the approaching direction 98 and the separating direction 100.
, 102. The first guide bar 101 has a cylindrical shape with a relatively large diameter, and one end thereof is rotatably supported by a support member 103 fixed to the base 1. Further, a motor 104 as a rotational drive source fixed and supported on the base 1 is connected to the other end of the first guide bar 101 . Further, the second guide bar 102 has a cylindrical shape with a relatively small diameter, and has one end fixed to the support member 103 and the other end connected to the motor 104.
The first guide bar 101 is fixedly attached to the housing of the first guide bar 101 and disposed on the side of the first guide bar 101. That is, the first guide bar 101 is rotatable, while the second guide bar 102 remains stationary.

The first and second guide bars 101 and 102 have a first moving frame 105 corresponding to the first work W1 and a second work W1.
A second moving frame 106 corresponding to No. 2 is supported along the first and second guide bars 101 and 102 so as to be able to approach and move away from each other. A first arm 107 that grips the first workpiece W1 is supported by the first moving frame 105 so as to be movable in a horizontal direction perpendicular to the first and second guide bars 101 and 102. is movable in a direction parallel to the first arm 107, and a second arm 108 is supported.

The structures of the first and second moving frames 105, 106, the structures of the first and second arms 107, 108, and the structures for driving the first and second arms 107, 108 are basically the same, so the following will be explained below. , only the parts related to the second moving frame 106 and the second arm 108 will be described in detail, and the explanation of the parts related to the first moving frame 105 and the first arm 107 will be omitted.

With reference to FIG. 8 and FIG. 9, the second moving frame 10
6 surrounds the first guide bar 101 and is basically formed into a cylindrical shape, and is movable in the axial direction of the first guide bar 101 . In addition, the second guide bar 102 passes through a rotation preventing protrusion 109 protruding from the side of the second moving frame 106, thereby preventing the second moving frame 106 from rotating around its axis.

Further, a guide portion 111 having a guide hole 110 extending horizontally and perpendicular to the axes of the first and second guide bars 101 and 102 is integrally protruded from the upper part of the second moving frame 106. The arm 108 is slidably inserted into the guide hole 110.

In FIG. 10, a clamp mechanism 112 for gripping the second workpiece W2 is provided at the tip of the second arm 108 (left end in FIG. 9). This clamp mechanism 112 is
a gripping hole 113 that opens toward the second hopper 13 side in the supply mechanism 2 and is opened on the side surface of the second arm 10B;
A pressing portion 1 provided at the tip of the drive rod 114 cooperates with the inner surface of the gripping hole 113 to grip the second workpiece W2.
It consists of 15.

The inner diameter of the gripping hole 113 is set to such an extent that the rod-shaped portion 7 of the second workpiece W2 can be inserted therein, and a sliding hole 116 that opens on the inner surface of the gripping hole 113 near the closed end is connected to the second arm 10.
8, and the sliding hole 116 opens at the rear end of the second arm 108. The drive rod 114 is slidably fitted into the slide hole 116 and is movable relative to the second arm 108 in the axial direction within a limited range. Moreover, driving rod 1
14 is biased toward the rear end side by a spring (not shown).

In such a clamp mechanism 112, the drive rod 11 is inserted in the gripping hole 113 with the rod-shaped portion 7 of the second workpiece W2 inserted.
4 by moving it against the spring biasing force,
The rod-shaped portion 7 is attached to the inner surface of the gripping hole 113 and the pressing portion 11.
Clamped at 5.

In order to move the second arm 108 in the axial direction and to move the drive rod 114 relative to the second arm 108 in the axial direction, the first guide bar 101 has an axial direction with respect to the second moving frame 106. The cam member 11 is prevented from relative movement and relative angular displacement with the first guide bar 101.
7 is installed. This cam member 117 is basically disk-shaped and is housed within the second moving frame 106.

A through hole 118 is bored in the center of the cam member 117 to allow the first guide bar 101 to pass therethrough, and a hole is formed in either the inner surface of the through hole 118 or the outer surface of the first guide bar 101, for example, in the circumferential direction. Key 119 in two places spaced apart
is fitted. On the other hand, a groove 120 into which the key 119 is fitted is formed long in the axial direction on either the inner surface of the through hole 118 or the first guide bar 101 . Therefore, the cam member 117 rotates in response to the rotational movement of the first guide bar 101. In addition, the second moving frame 106
It moves according to the axial movement of. Note that the first guide bar 1
01 and the cam member 117 may be spline-coupled.

On the other hand in the axial direction, the end surface of the cam member 117 has a groove-shaped first groove.
A cam 121 is provided, and a second cam 122 is provided on the outer periphery of the cam member 117. The first cam 121 is for moving the second arm 108 in the axial direction, and a first link mechanism 123 is disposed between the first cam 121 and the second arm 108. The second cam 122 is used to move the drive rod 114 relative to the second arm 108 in the axial direction, and a second link mechanism 124 is disposed between the second cam 122 and the drive rod 1114. Ru.

In order to connect the first and second link mechanisms 123 and 124 with the first and second cams 121 and 122 of the cam member 117, a cam member 1 is provided on the side of the second moving frame 106.
An opening 125 is provided through which a part of the opening 17 is exposed to the outside.

The first cam 121 and the first link mechanism 123 rotate the second arm 108 in response to the rotational movement of the first guide bar 101.
The second cam 122 and the j-th sink mechanism 124 function to move the second arm 108 in the forward and reverse directions along the parallel conveyance direction 99, and the second cam 122 and the jth sink mechanism 124 It functions to press the drive rod 114 forward and to move the drive rod 114 rearward after completing its movement along the separation direction 100.

The first link mechanism 123 has a cam follower 126 at one end that can roll within the first cam 121, and its intermediate portion is connected to a second cam follower 126 by a support shaft 127 parallel to the first guide bar 101.
a link 128 in a straight line pivotally supported by the moving frame 106;
A linear link 13 is connected to one end of the link 128 by a pin 129 parallel to the support shaft 127 and projects outward from the second moving frame 106 through the opening 125.
0, and the link 130 is pivoted at its lower end to a bracket 132 by a pin 131 parallel to the bin 129, and at the middle part by a pin 133 parallel to the bin 131.
and a link 134 to which the other end is connected.

A supporting arm portion 135 that projects outward is integrally provided at the lower part of the second moving frame 106, and the bracket 132 is provided at the tip of this supporting arm portion 135.

The second link mechanism 124 has a cam follower 136 in sliding contact with the second cam 122 at one end, and is formed into a substantially V-shape 4, and has a link 137 whose intermediate bent portion is pivotally supported by the second moving frame 106. , are arranged in parallel with the link 134 of the first link mechanism 123 and have a pin 13 at the lower end.
and a linear link 139 to which the other end of the link 137 is connected via a link 8.

A support arm 140 that protrudes in the same direction as the support arm 135 is integrally provided on the upper part of the second moving frame 106, and the link 137 is supported by a pin 141 parallel to the first guide bar 101. An intermediate bending portion is pivoted to the support arm 140 . Further, the pin 138 connecting the links 137 and 139 is parallel to the pin 141.

An elongated hole 142 extending along the longitudinal direction is bored in the intermediate portion of the link 139 in the second link mechanism 124, and the bottle 133 connecting the link 130 and the link 134 is fitted into the elongated hole 142. will be combined. Therefore, in response to the swinging of the link 134 in the first link mechanism 123, the link 139 of the second link mechanism 124 also moves to the pin 1.
38 as a fulcrum, but the swinging motion does not affect the V-shaped link 137. Also link 1
The swinging motion of 37 is caused by the link 13 with the bin 133 as the fulcrum.
It is converted into a rocking motion of 9.

In FIG. 11, a frame 143 is fixed to the rear end of the second arm 108. As shown in FIG. This frame body 143 has two parallel
Two rectangular connecting holes 144 and 145 are provided above and below, the upper end of the link 134 in the first link mechanism 123 is fitted into one connecting hole 144, and the upper end of the link 134 in the first link mechanism 123 is fitted into the other connecting hole
The upper end of the link 139 in the second link mechanism 124 is fitted into the upper end of the link 45 . Moreover, the rear end of the drive port 114 protrudes into the other connection hole 145.

Therefore, the link 13 in the first link mechanism 123
4, the second arm 108 moves in the axial direction. At this time, the link 139 of the second link mechanism 124 also swings about the pin 138, so there is no effect on the action of the drive rod 114. On the other hand, the second link mechanism 124
When the link 137 swings, the link 139 swings about the bin 133 as a fulcrum, thereby causing the drive rod 114 to move relative to the second arm 108 in the axial direction.

Referring also to FIG. 12, a third cam 146 is fixed to the first guide bar 101 between the motor 104 and the second moving frame 106, and the third cam 146 and both moving frames 105, 106 A third link mechanism 147 is provided in between. This third cam 146 and third link mechanism 147
serves to move both moving frames 105 and 106 along the approaching direction 98 or along the separating direction 100 in accordance with the rotational movement of the first guide bar 101.

The third cam 146 has a short cylindrical shape, and a cam groove 148 is provided on its outer peripheral surface. On the other hand, the third link mechanism 1
47 is a swinging rod 14 arranged below the third force train 146.
9, a first connecting rod 150 that connects one end of the swinging rod 149 and the first moving frame 105, and a second connecting rod 151 that connects the other end of the swinging rod 149 and the second moving frame 106.
Equipped with.

A cam follower 152 that moves within the cam groove 148 of the third cam 146 is supported approximately at the center of the swinging rod 149, and the swinging rod 149 is supported by a vertical support at an intermediate portion between the cam follower 152 and one end. It is pivotally supported on the base 1 by a shaft 153.

According to this configuration, the third cam 146 rotates in accordance with the rotation of the first guide bar 101, so that the swinging rod 14
9 swings around the support shaft 153, and this swinging rod 149
The swinging motion is converted by the first and second connecting rods 150 and 151 into an approach movement and a separation movement of the first and second moving frames 105 and 106.

The motor 104, the third cam 146, and the swinging rod 149 are housed and arranged within the cover 154, and the first and second
The connecting rods 150, 151 protrude into the cover 154 in such a way that their operation is not supported.

Referring again to FIG. 1, the conveyance mechanism 6 conveys the bar 9 from the friction welding machine 3 to the boring device 4, and an arm 156 having a clamping means 155 at its tip is connected to the friction welding machine. It is supported by a guide block 157 on the base 1 so as to be movable from a position corresponding to 3 to a position corresponding to the hollowing out device 4. Clamping means 15
5 is configured so that it can be opened on its distal end side.

In this transfer device 6, the structure for driving the arm 156 and the structure for operating the clamping means 155 are basically the same as the structure of the parts related to the second arm 108 and the clamping mechanism 112, as described above. , and detailed explanation will be omitted.

Next, to explain the operation of this embodiment, the exhaust valve 11
In manufacturing, the first workpiece W1 stored in the first hopper 12 and the second workpiece W stored in the second hopper 13 are
2 and 2 are held opposite each other on the same axis by the holding portions 16 and 19. In this state, the first and second moving frames 105 and 106 in the synchronous conveyance device 5 are located close to each other, and the first and second arms 107 and 108 clamp the clamp mechanisms 112 at their tips. It is located on the same axis as the second works Wl and W2. Due to the operation of the motor 104, the first and second moving frames 105,
When 106 is moved away, the first and second arms 10
The rod-like portions 7 of the first workpiece W1 and the second workpiece W2 are inserted into the gripping holes 113 in the clamping mechanism 112 at the tips of the workpieces 7 and 108. Therefore, by moving the drive rod 114 axially forward with respect to the first and second arms 107, 108, the first and second works Wl, W2
are each held by a clamp mechanism 112.

Thereafter, by moving the first and second moving frames 105, 106 closer together, the first and second workpieces Wl, W2
moves along the approach direction 98, and by moving the first and second arms 107, 108 forward, both works Wl, W2 move along the parallel conveyance direction 99. When the first and second works Wl, W2 reach the positions corresponding to the friction welding machine 3, the first and second moving frames 105 and 106 are moved away from each other, and the first and second works Wl, W2 moves along the separation direction 100.

When the end of the separation direction 100 is reached, the first workpiece W1
is gripped by the workpiece gripping mechanism 32 of the spindle 20, and the second workpiece W2 is gripped by the chuck mechanism 21.

When the first workpiece W1 is gripped by the workpiece gripping mechanism 32, the moving cylinder 25 is contracted, and the moving table 23
is retreated so as not to impede the movement of the first workpiece Wl. Further, the drive cylinder 47 is extended, and as the drive rod 43 moves forward under pressure from the piston rod 52, the collet 34 moves forward to a position where its pressure receiving surface 39 is separated from the pressing surface 38.

By moving in the separation direction 100 in this state, the first work 1 is inserted into the insertion hole 40 of the collet 34 until it comes into contact with the support member 42 . At this time, the clamping state of the clamp mechanism 112 in the first arm 107 is released, and the drive cylinder 47 is further contracted. therefore,
The drive rod 43 moves to the right in FIG. 4 due to the spring force of the spring 46.
Collet 34 is also drawn into holder 33. Therefore, the pressure receiving surface 39 comes into pressure contact with the pressing surface 38, the diameter of the collet 34 is reduced, and the first workpiece W1 is gripped.

After the chuck mechanism 21 grips the second workpiece W2, the clamping mechanism 112 grips the second workpiece W2 at the tip of the second arm 108.
The grip on the workpiece W2 is released, and the first and second arms 1
07 and 108 return to their original positions.

With the first and second workpieces Wl and W2 being held oppositely on the same axis by the gripping mechanism 32 and the chuck mechanism 21, the moving cylinder 25 is extended and the moving table 23 is moved forward toward the chuck mechanism 21. At the same time, the motor 29 is activated and the spindle 20 is rotated. Therefore, the first workpiece W1 is pressed against the second workpiece W2 while rotating, whereby the first and second works W1 and W2 are friction welded to form the bar 9.

It is assumed that during this friction welding, the diameter of the first workpiece W1 is smaller than a set value. In such a case, conventionally, the first workpiece W1 is insufficiently gripped by the spindle 20, which may result in defective welding. However, in the workpiece gripping mechanism 32 of the spindle 20, a gap 49 is created between the closed end of the regulating member 45 and the engaging claw 44, and the collet 34 acts on the first workpiece W1 from the outside in the axial direction during friction welding. It is pushed further into the holder 33 by the pressing force. Therefore, the diameter of the collet 34 is further reduced and the first workpiece W1 can be reliably gripped, so that welding defects that conventionally occur do not occur.

After the friction welding is completed, the arm 156 in the transport mechanism 6 moves forward, and the bar 9 is gripped by the clamping means 155 at its tip. Next, the spindle 20 is released from the gripping state by the workpiece gripping mechanism 33, the movable table 23 retreats, the gripping state by the chuck mechanism 21 is also released, and the arm 156 retreats, so that the bar 9 is removed from the boring device 4. transported to.

In the boring device 4, the spindle 63 is retracted prior to moving the bar 9, and the die 57 is also opened. When the bar 9 is conveyed in this state, the spindle 63 advances and the opening/closing cylinder 90 is contracted. therefore,
The first work Wl side of the bar 9 is inserted into the insertion hole 60 of the guide member 58 until the receiver contacts the member 66, and the die 57 is closed and the second work W2 side of the bar 9 is slid by the die 57. Possibly retained. Thereupon, the grip of the bar 9 by the clamping means 155 is released, and the arm 156 further retreats.

In the extrusion mechanism 56, high pressure air is supplied to the passage 69 after the bar 9 is inserted into the insertion hole 60, and when the high pressure air is sufficiently increased, for example, to 6 atmospheres, the on-off valve 70 opens. As a result, high-pressure air suddenly acts on the end surface of the bar 9 from the blowout hole 67. Therefore, an impactful pressing force acts on the bar 9, and the bar 9 rapidly moves toward the die 57 along the insertion hole 60. As a result, the burr 1 of the bar 9
0 collides with the face 88 of the die 57, and the burr 10 is instantly removed.

The bar 9 from which the burr 10 has been removed, ie, the exhaust valve 11, is pushed by air pressure and is discharged from the guide tube 95 through the chute 96.

Moreover, the process from the end of friction welding to the hollowing out is carried out while the temperature of the hollowing out 10, which is at a high temperature due to the heat generated by friction welding, hardly decreases, which makes it extremely easy to remove the hollowing out. done effectively.

In this way, the pair of first and second workpieces WL W
The steps of supplying, friction welding, and boring described in step 2 are performed continuously and smoothly, and the exhaust valve 11 is continuously manufactured.

C1 Effects of the Invention As described above, according to the present invention, the first guide bar connected to the rotational drive source and the second whistle guide bar are arranged in parallel in the approaching and separating directions, and a pair of The movable frame is movably mounted, and a clamp mechanism is provided at the tip of an arm that is movable in a direction perpendicular to both guide bars and supported by each movable frame, and each arm is equipped with a drive rod for operating the clamp mechanism. are provided to be movable relative to each other in the axial direction, and a cam member that moves together with each moving frame is mounted on the first guide bar while preventing relative rotation.
First and second link mechanisms are arranged between the cam and the second cam, as well as the arm and the drive rod, and a third link mechanism is arranged between the third cam fixed to the first guide bar and both moving frames. Therefore, by using the first guide bar rotated by a single rotational drive source, it is possible to synchronize the approaching and separating movement of both moving frames, the axial movement of both cams, and the operation of the clamp mechanism, which was not necessary in the past. By eliminating the need for a plurality of drive sources, the overall size can be reduced, and the cost can be reduced.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall plan view, FIG. 2 is a diagram showing the process of processing a workpiece, and FIG. 3 is an enlarged cross-sectional view taken along line mm in FIG. 1. Fig. 4 is an enlarged vertical cross-sectional view of part ■ in Fig. 3, Fig. 5 is an enlarged longitudinal cross-sectional view of the main part of the debossing device, Fig. 6 is a cross-sectional view along the vr-vt line of Fig. 5, and Fig. 7 is a synchronous An enlarged plan view of the conveyance device, FIG. 8 is an enlarged view taken in the direction of the ■ arrow in FIG. 7, FIG. 9 is a sectional view taken along the line IX-IX in FIG. 8, and FIG. Figure 11 is the Xl of Figure 9.
-X1 line enlarged sectional view, and FIG. 12 is an xn-x ■ line sectional view of FIG. 5... Synchronous conveyance device, 101... First guide bar,
102... Second guide bar, 104... Motor as a rotational drive source, 105, 106... Moving frame, 107
゜108...Arm, 112...Clamp mechanism, 1
14... Drive rod, 117... Cam member, 121
...First cam, 122...Second cam, 123...
First link mechanism, 124...Second link mechanism, 146
...Third cam, 147...Third link mechanism, Wb W2...Work patent applicant Honda Motor Co., Ltd. 1 (,-2) Fig. 10 Fig. 12

Claims (1)

[Claims] In a synchronous conveyance device for synchronously conveying a pair of workpieces held facing each other in their approaching and separating directions and in a direction orthogonal to the approaching and separating directions, The first and second
a guide bar; a pair of moving frames movably supported by the first and second guide bars; and an arm movable in a direction orthogonal to the first and second guide bars and supported by each of the moving frames, respectively. a clamp mechanism provided at the tip of each of the arms so as to be able to grip and release the work; and a clamp mechanism provided on each arm so as to be movable in its longitudinal direction to operate the clamp mechanism. a drive rod that is attached to the first guide bar and prevents relative rotation with the first guide bar and relative movement with each moving frame along the longitudinal direction of the first guide bar;
and a pair of cam members each having a second cam; a first link mechanism disposed between the first cam and the arm to move the arm in its longitudinal direction in response to rotation of the cam member; a second link mechanism disposed between the two cams and the drive rod to move the drive rod relative to the arm in accordance with rotation of the cam member; a third cam fixed to the first guide bar; and; third
a third link mechanism disposed between the cam and the moving frames for moving the moving frames toward and away from each other along the first and second guide bars in response to rotation of the third cam;
A synchronous conveyance device comprising: a rotational drive source connected to a guide bar;