JP2504762Y2 - Transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention includes a first station group in which stations are arranged at a predetermined pitch and a second station group in which a station is arranged at a longer pitch. Pass through 1,
The present invention relates to a transfer device in which a second transfer bar is reciprocally arranged and the transfer pitch of the second transfer bar becomes the pitch of a corresponding station by the movement of the first transfer bar.

Conventional Technology Conventionally, in the transfer device as described above,
Instead of moving the first and second transfer bars by different drive sources, transfer the transfer bar that is moved by one drive source to the other transfer bar by using a rack and a pinion provided coaxially, and transfer the transfer bar. It has been proposed that they are moved at different pitches.

In the above conventional device, the rack bar provided on the first transfer bar can be freely inserted through the second station group,
If the rack bar of the second transfer bar can be freely inserted in the first station group, the station interval between the first and second station groups can be made relatively small. If the rack bar cannot be inserted through the station group by interfering with the jig device installed in the station group that does not correspond to the bar,
The configuration shown in FIG. 6 was adopted. That is, in the conventional transfer device 101 shown in FIG. 6, Q is the pitch L.
, The station of the second station group arranged in R, the station R of the first station group arranged at the pitch l,
S is an idle station, X is the conveying direction of the pallet 102, 104 is a rack bar provided at the rear end of the pair of first transfer bars 103, and 106 is a pair of second transfer bars 105.
The rack bar provided at the front end of the
The rack bar 106 is meshed with a small diameter pinion 107 having a pitch circle diameter of 1 supported by the above, and the rack bar 106 is coaxially provided with the small diameter pinion 107 through a shaft 109 so as to be integrated with the small diameter pinion 107. Is engaged with the first transfer bar 103.
Is moved by a pitch l, the pinions 107 and 108 are rotated and the second transfer bar 105 is moved by a pitch L. The pallet 102 moved by the pitch L from the frontmost station Q is moved to the idle station S by a moving device (not shown) as shown by an arrow Y.

Problems to be Solved by the Invention In FIG. 6, the large and small diameter pinions 107 and 108 coaxially provided and the first and second rack bars 1 that mesh with them are provided.
04 and 106, the first and second transfer bars 103 and 105 are moved at different pitches L and l.
From the pinion 107 to the second of the rack bar 104 of the first transfer bar 103 in the state before the movement (solid line position in FIG. 6).
Station Q, which is the most terminal in the transport direction of the station group
The pop-out amount toward (the one on the right side in FIG. 6) is set longer than the pitch l so that the rear end of the rack bar 104 does not interfere with the station Q, and when the second transfer bar 106 moves, The pinion and the station R are arranged so as not to interfere with the station R (the one on the left side in FIG. 6) which is located at the most end in the transport direction of the first station group.
The interval between the station Q at the end of the second station group and the station R at the start of the first station group is the sum (L + 1) of the transport pitches in each station group. ), And as a result, there was a problem that the total transfer line length became long. An object of the present invention is to solve such a problem.

Means for Solving the Problems In order to solve the above problems, the present application relates to a first station group in which stations are arranged at a predetermined pitch and a second station group in which stations are arranged at a pitch longer than the pitch. Lined up in series through the idle station,
1st, 2nd passing each station to 1st, 2nd station group
In a transfer device in which a transfer bar is reciprocally arranged and a lift device capable of raising and lowering a conveyed object is arranged in each station, the first transfer bar includes the first transfer bar of the first station group. A reciprocating device for reciprocating the stroke corresponding to the pitch was connected, and the pinion gear for the first transfer bar was placed in the first station group direction with the idle station interposed therebetween, and the pinion gear was separated from the second station group direction. The pinion gears for the second transfer bar are rotatably arranged around the axes perpendicular to the respective transfer bars at the positions, and the strokes of the pinion gears on the corresponding side of the first and second transfer bars are full stroke. Rack teeth that mesh with each other are integrally provided, and the pinion gears are transmitted between them. The pinion gear outer diameter ratio or the power transmission mechanism transmission ratio is reciprocated by a stroke corresponding to the pitch of the station corresponding to the second transfer bar by the reciprocating motion of the first transfer bar. It is characterized by being set to a size.

When the first transfer bar is reciprocated by the reciprocating device by a stroke corresponding to the pitch of the first station group, the pinion gear meshing with the rack teeth of the first transfer bar is rotated, and the rotation of the pinion gear is changed by the transmission mechanism. It is transmitted to a pinion gear that meshes with the rack teeth of the two transfer bars, and the second transfer bar is reciprocated by a stroke corresponding to the pitch of the second station group.

Embodiment In FIGS. 1 and 2, a processing station group for sequentially processing a work (not shown) mounted on a well-known pallet 4 is composed of a large number of processing stations (ST).
n + ₁ is shown, STn + _{2 and} subsequent figures are not shown), a first station group A in which pitches P ₁ are arranged, and a large number of processing stations (only STn, STn- ₁ are shown, STn- _{2 and} earlier are not shown) The second station group B is arranged at a pitch P ₂ (P ₁ <P ₂ as shown in FIG. ₁ ). Between the first station group A and the second station group B, the idle stations SI are arranged at the pitch P ₁ from the processing stations STn, STn + ₁ , respectively, and the processing stations of the second station group B are located in this idle station SI. The pallet 4 which has been conveyed in the lengthwise direction is rotated 90 degrees by a turning device (not shown).
Between the processing stations of the first station group A, two left and right first transfer bars 11 constituting the transfer device 1 are arranged movably in the longitudinal direction with an interval slightly smaller than the vertical width of the pallet 4, The rear end passes over the idle station SI and the underframe 62 of the processing station STn
It extends to the vicinity (Fig. 3). Between the processing stations of the second station group B, two second transfer bars 12 on the left and right are provided at the same height position as the first station 11 and are movable in the longitudinal direction at intervals slightly smaller than the lateral width of the pallet 4. The front end is slightly extended from the underframe 62 of the processing station STn. The left and right first and second transfer bars 11 and 12 are connected by connecting bar plates 13 and 14, respectively. Locking holes 4a are provided on the upper surfaces of the first and second transfer bars 11 and 12 in pairs in a diagonal direction of the pallet 4.
A pair of locking pins 11a and 12a to be fitted in (FIGS. 3 and 4) are provided so as to correspond to the pallet position of each station, and the locking pin 12a of the second transfer bar 12 is fed in the longitudinal direction. The locking pin 11a of the first transfer bar 11 corresponds to the locking hole 4a of the pallet 4 to be opened, and the locking pin 4a of the pallet 4 after turning 90 degrees. Rack bars 17 are fixedly attached to the lower surfaces of the two first transfer bars 11 from the rear end to a portion slightly longer than the pitch P ₁ and having a margin, and the lower surfaces of the rack bars 17 are as shown in FIG. Rack teeth 19 are formed on an intermediate portion except both side edge portions, and both side edge portions are formed on the guide surface 17d. The rack bars 21 are fixed to the lower surfaces of the two second transfer bars 12 from the front end to a portion slightly longer than the pitch P ₂ and have a rack tooth 23 on the lower surface of the rack bar 21 as described above. Guide surface 21
d are formed respectively. The portion of the first transfer bar 11 where the rack bar 17 is provided is a guide roller 25a, 25 which is rollable.
It is supported by b and 25c so as to be movable in the carrying direction.
The guide rollers 25a are provided on both ends of a roller bearing shaft 80d (FIG. 3) described later, the guide rollers 25b are provided on the shaft 27b provided on the upper end of the bracket 27 rising from the floor, and the guide rollers 25c are provided on the processing station STn + ₁ . A pair of front and rear brackets 32 are rotatably supported by pivots 34 supported by brackets 32 fixed to each other. The guide rollers 25a, 25b, 25c are formed with a recessed groove 36 for allowing the rack teeth 19 to enter in the central portion of the outer periphery, and the guide surface 17d of the rack bar 17 is placed on the outer peripheral end surface excluding the recessed groove 36. The 1 transfer bar 11 is movably supported in the longitudinal direction. The rack bar of the first transfer bar 11
As is well known, the portion not provided with 17 is supported by guide rollers (not shown) provided in pairs at each processing station so as to be movable in the carrying direction. The portion of the second transfer bar 12 where the rack bar 21 is provided is the guide rollers 40a, 40
The guide rollers 40a are supported by b, 40c, 40d, and the guide rollers 40a are provided on the pivot shaft 44 supported by brackets 42 fixed to the processing station STn one by one in front and rear, and the guide rollers 40b, 40c, 40d are provided at the upper end of the bracket 46, respectively. The shafts 46b, 46c, 46d are rotatably supported respectively. The guide rollers 40a, 40b, 40c, 40d are also formed with concave grooves 47 for allowing the rack teeth 23 to enter, and the guide surface of the rack bar 21 is formed on the outer peripheral end surface excluding the concave grooves 47.
2nd transfer bar 12 by placing 21d
Is movably supported in the longitudinal direction. As is well known, the portion of the second transfer bar 12 where the rack bar 21 is not provided is a guide roller 3 provided at each processing station STn- ₁ .
It is supported by 7 so as to be movable in the transport direction.

Next, FIG. 5 shows an example of a reciprocating device 50 for reciprocating the first transfer bar 11. The lower surface of one of the first transfer bars 11 has a margin slightly longer than the pitch P ₁ from the front end. Up to the portion, a rack bar 51 having rack teeth (reference numeral omitted) on the lower side is fixed like the rack bars 17 and 21. A support frame 53 is provided beside the front end portion of the first transfer bar 11, and an AC servomotor M is fixed to the support frame 53. A drive gear 54 meshed with the rack bar 51 is fixed to the rotating shaft of the AC servomotor M, and the drive gear 54 moves the first transfer bar 11 to a virtual line in the drawing.
The rotation is controlled so that it reciprocates by P ₁ . As the reciprocating device 50, the first transfer bar 11 may be reciprocally moved by a cylinder in which the piston rod of the cylinder is connected to the connecting bar plate 13.

Next, an underframe 61 is provided in the first station group A direction with the idle station SI interposed therebetween, and an underframe 62 is provided at a position away from the underframe 61 in the second station group B direction. Gearboxes 63 and 64 are fixed onto these underframes 61 and 62. The gear boxes 63 and 64 are shown in FIG.
As shown in FIG. 4, transmission shafts 65 and 66 in directions orthogonal to the first and second transfer bars 11 and 12 are rotatably supported. The shaft portions 68a of the gear member 68 including the shaft portion 68a and the pinion gear 68b for the first transfer bar are fixed to both ends of the one transmission shaft 65, and the other ends of the shaft portions 68a of the gear members 68 are fixed. Is rotatably supported by a bearing 75 provided on a side wall 73 fixed to the underframe 61. The pinion gear 68b provided integrally with the gear member 68 meshes with the rack teeth 19 at the front end portion of the rack bar 17. A shaft portion 80a, a pinion gear 80b for the second transfer bar, a bearing shaft portion 80c, and a roller support shaft 80d are provided at both ends of the other transmission shaft 66.
The shaft portions 80a of the gear member 80 composed of and are respectively fixed, and the supporting shaft portions 80c of these gear members 80 are fixed to the underframe 62.
It is rotatably supported by a bearing 86 provided at 4. A pinion gear 80b integrally provided between the shaft portion 80a of the gear member 80 and the bearing shaft portion 80c meshes with the rack teeth 23 at the front end portion of the rack bar 21. As a result, the lap amount of the first and second transfer bars 11 and 12 is extremely small. The outer diameter ratio of the pinion gears 68b and 80b is 1st transfer bar 1
The second transfer bar 12 by the reciprocating motion of the pitch P ₁ of ₁
Is set to the ratio of stroke reciprocation corresponding to the pitch P ₂ . The gearboxes 63 and 64 are rotatably supported by the turning shafts 91 and 92 parallel to the first and second transfer bars 11 and 12 in a state of facing each other.
A gear mechanism (not shown) for transmitting the rotations of 5,66 to the deflection shafts 91, 92 is provided. The deflection shafts 91 and 92 are connected by a transmission rotation shaft 93. These gearboxes 6
A transmission mechanism 90 is configured by 3, 64, transmission shafts 65, 66, deflection shafts 91, 92, and transmission rotation shaft 93. In addition, each pinion gear
Gearbox 63, 64 instead of 68b, 80b outer diameter ratio
The gear mechanism (not shown) is configured such that the transmission ratio is such that the second transfer bar 12 reciprocates by a stroke corresponding to the pitch P ₂ by the reciprocating motion of the pitch P ₁ of the first transfer bar 11. Is also good. Further, the power transmission mechanism 90 of the present embodiment is an example, and a chain wheel may be provided at one end of the power transmission shafts 68 and 80 for transmission by a chain, or transmission by a pulley and a belt. good. In the transfer device 1, the well-known lift device 95 provided at each processing station moves the pallet 4 up and down to engage and disengage the locking holes 4a and the locking pins 11a, 12a. In addition, from the processing station STn to the idle station SI, the pitch P is set by the second transfer bar 12.
There is provided a well-known returning device (not shown) for returning the pallet 4 transferred in ₂ to the processing station STn side by a distance of (P ₂ -P ₁ ). Rollers 96 and 97 are provided on the upper surfaces of the side walls 73 and 84, respectively, and regulate the vertical direction of the first and second transfer bars 11 and 12. Reference numeral 98 is a known positioning device for positioning the pallet 4 provided at each processing station.

Next, the operation will be described. As shown in FIGS. 3 and 4, the pallet 4 arranged at each processing station is lifted by the lift device 95, and the locking hole 4a and the locking pin 11a,
The work on the pallet 4 is processed in a state where 12a and 12a are not locked. In this case, the processing time of each processing station is the same. When the processing is completed, the pallet 4 is lowered by the lift device 95 of each processing station, the locking holes 4a and the locking pins 11a, 12a are engaged and placed on the first and second transfer bars 11, 12. It Then, when the AC servomotor M is operated and the first transfer bar 11 is moved to the right side in the drawing which is the transfer direction, the movement of the rack bar 17 causes the pinion gear 68b and the gear member 68 to rotate in the direction of the arrow in the drawing to transmit the power. The shaft 65 is rotated. The rotation of the transmission shaft 65 is transmitted to the transmission shaft 66 via the gear mechanism of the gear box 63, the deflection shaft 91, the transmission rotation shaft 93, the deflection shaft 92, and the gear mechanism of the gear box 64. The rotation of the transmission shaft 66 is a gear member.
80, the pinion gear 80b is transmitted, the pinion gear 80b is rotated in the direction of the arrow to move the rack bar 21, and the second transfer bar 12 is moved to the guide rollers 40a, 40b, 40c,
It is moved while being guided by 40d. When the first transfer bar 11 is moved by the pitch P ₁ , the pinion gear 68b,
Depending on the radius ratio of 80b the second transfer bar 12
Is moved by the pitch P ₂ to reach the position shown by the phantom line in FIG. 1, and the pallet 4 is placed in the processing station of the next process. The pinion gear 80b is arranged with a distance in the station STn direction with respect to the pinion gear 68b. In the state before the movement, the second transfer bar 12 has the pinion gear 80b.
It suffices that it meshes with 80b without being disengaged, and the tip (right end) of the second transfer bar 12 is slightly to the right of the pinion gear 80 (moving direction side). Therefore, pitch P2
The position of the tip (right end) of the second transfer bar 12 when moving is the position moved by the transport pitch P2 of the second transfer bar 12 from the position before the movement, as shown by the chain double-dashed line in FIG. The pinion gear 68b for the first transfer bar 11 of the second transfer bar 12 after the movement.
The amount of protrusion to the pinion gears 68b, 80b
By arranging the station STn + ₁ at the closest position where it does not interfere with the tip of the second transfer bar 12 after the movement, the distance between the stations STn, STn + ₁ can be reduced. The total length of the transfer line is shorter than before. After that, the pallet 4 is lifted by the lift device 95, and the locking hole 4a and the locking pin 11a,
The engagement with 12a is released, and the processing is started. The pallet 4 transferred from the processing station STn to the idle station SI is rotated by 90 degrees and is returned to the processing station STn side by the difference between the pitch P ₂ and the pitch P ₁ to be arranged at the virtual line position. Then, the AC servo motor M is activated again, and the first transfer bar 11 pitches in the opposite direction.
When P _{1 is} returned, the second transfer bar 12 is returned by the pitch P _{2 and} the locking pins 11a and 12a of the first and second transfer bars 11 and 12 are returned.
Is in the original position facing the locking hole 4a of the next pallet 4, and this is repeated thereafter.

As described above, according to the present invention, the movement of the first transfer bar 11 is transmitted to the second transfer bar 12 by the rack bar, the pinion gear, and the transmission mechanism, and the second transfer bar is moved to the first transfer bar 11.
It can move at a pitch longer than the transfer pitch of the transfer bar 11 and can correspond to the pitch of each station group, and the rack and rack and pinion can give an accurate pitch, eliminating the need for an interlock, and a control system The cost can be reduced.

As described above, according to the present invention, the first station group in which the stations are arranged at a predetermined pitch and the second station group in which the stations are arranged at a pitch longer than the pitch are connected in series via the idle station. Side by side, these first and second
In the transfer device, the first and second transfer bars passing through each station are reciprocally arranged in the station group, and a lift device capable of raising and lowering a conveyed object is arranged in each station. Is connected to a reciprocating device that reciprocates the first transfer bar by a stroke corresponding to the pitch of the first station group, sandwiches the idle station, and a pinion gear for the first transfer bar in the direction of the first station group. , A pinion gear for the second transfer bar is rotatably arranged around a shaft line in a direction orthogonal to each transfer bar at a position distant from the pinion gear in the direction of the second station group. The bar has rack teeth that mesh with the corresponding pinion gears over the entire stroke. Is integrally provided, and the pinion gears are connected to each other via a transmission mechanism so that they can be rotationally transmitted.
Further, the outer diameter ratio of the pinion gear or the transmission ratio of the transmission mechanism is set to a size in which the second transfer bar reciprocates by a stroke corresponding to the pitch of the corresponding station by the reciprocating motion of the first transfer bar. The amount of protrusion from the pinion gear position for the second transfer bar to the tip position of the second transfer bar after the movement is the same as the distance between the two pinion gears compared to the conventional one having the pinion gears for the first and second transfer bars on the same axis. By arranging the station at the beginning of the first station group at the closest position so as not to interfere with the tip of the second transfer bar after the movement, the station at the end of the second station group and the first station The distance from the start station of the station group can be made smaller than before, and transfer There is an advantage that can be shortened in length.

[Brief description of drawings]

1 shows a plan view of an intermediate portion of a transfer device, FIG. 2 is a side view thereof, FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, FIG. 5 is a plan view of a terminal portion of the transfer device, and FIG. 6 is an explanatory view showing a conventional technique. 1 ... Transfer device, 11, 12 ... First and second transfer bars, 17, 21 ... Rack bar, 19, 23 ... Rack teeth, 50 ... Reciprocating device, 68b, 80b ... Pinion gear, 90 ... Transmission mechanism, 95 ...
Lifting apparatus, A ... first station group, B ... second station _{group, STn- 1, STn, STn +} 1 ... ( machining) station, SI ... idle station, P _1, P ₂ ... Pitch

Claims (1)

(57) [Scope of utility model registration request] 1. A first station group, in which stations are arranged at a predetermined pitch, and a second station group, in which pitches are arranged at a pitch longer than the pitch, are arranged in series via an idle station. In the transfer device, the first and second transfer bars passing through each station are reciprocally arranged in the second station group, and the lift device capable of raising and lowering a conveyed object is arranged in each station. A reciprocating device that reciprocates the first transfer bar by a stroke corresponding to the pitch of the first station group is connected to the transfer bar, and the first station is disposed in the first station group direction across the idle station.
A pinion gear for the transfer bar, and a pinion gear for the second transfer bar at a position distant from the pinion gear in the direction of the second station group are rotatably arranged around axes in directions orthogonal to the respective transfer bars. The first and second transfer bars are integrally provided with rack teeth that mesh with the corresponding side pinion gears over the entire stroke, and the pinion gears are rotatably connected through a transmission mechanism. The outer diameter ratio of the pinion gear or the transmission ratio of the transmission mechanism is set to a size in which the second transfer bar reciprocates by a stroke corresponding to the pitch of the corresponding station by the reciprocating motion of the first transfer bar. Transfer device.