JPS6146372B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to an intermittent transfer device.

Prior art and its problems For example, when welding, attaching parts, or painting a car body in an automobile manufacturing factory, work stations are installed at predetermined intervals on a car body transfer line. A robot is placed at a station to perform the required work, but in order to perform this work, it is necessary for the robot to stop regularly for a certain period of time long enough for the transferred object to be worked on. There has been a demand for a rational intermittent transfer device suitable for this purpose.

By the way, as an intermittent transfer device,
As disclosed in Publication No. 82719, in a heating furnace with a structure in which the furnace body is divided into many parts, the material is heated by repeatedly driving each of the many walking beam mechanisms, that is, repeating the cycle of raising, advancing, lowering, and retreating. There are some objects that are transferred intermittently, but when many walking beams are linked (synchronized) by a hydraulic system, it is extremely difficult to make the speed of the hydraulic cylinders of each walking beam the same due to the hydraulic circuit, and it is difficult to avoid collisions between walking beams. Because of this risk, it was necessary to take preventive measures.

An object of the present invention is to eliminate the above-mentioned problems by making a single back-and-forth moving member that reciprocates between the pitches of a plurality of work stations, and by attaching a fully movable support member to this, and in addition, each station can be By arranging a fixed support member for each time, it is possible to regularly stop the transferred objects during a certain period of work, and it is also a rational method that allows stable and smooth operation without applying strong impact to the transferred objects during transfer. The object of the present invention is to provide an intermittent transfer device.

Means for Solving the Problems In order to achieve the above object, the intermittent transfer device according to the present invention includes a fixed support member disposed at each of a plurality of stations existing at predetermined intervals in the transfer direction; A movable support member that is placed at each station and whose upper surface is lower than the supported surface of the transferred object when stationary, and a movable support member that is attached to all movable support members and extends in the front and back direction and has rails on both sides between the station and the pitch. An upper back-and-forth moving member that reciprocates the upper back-and-forth moving member, and upper support rollers that receive each rail and movably support the upper back-and-forth move member are provided at predetermined intervals, and the cam follower is installed at a position below the upper support roller. a vertically movable member that extends in the front-rear direction and is arranged parallel to each rail and rises to lift the transferred object from the fixed support member; and a lifting plane arranged to correspond to each cam follower. The lower back and forth moving member is equipped with a cam and is arranged parallel to each rail and extends in the front and rear direction, and is driven by a fluid pressure cylinder. A lower support roller movably supporting the movable member, a rack provided on the lower surface of the upper back-and-forth movable member, and a pinion mounted on the vertically movable member and easily meshed with each other and driven by a reversible electric motor. The cam is formed with a front upper horizontal part, a rear lower horizontal part, an upper steep slope part connecting the front upper horizontal part and the rear lower horizontal part, an intermediate gentle slope part, and a lower slope part. The cam follower is positioned at an intermediate gentle slope portion when an object to be transferred is transferred between the support member and the movable support member.

Note that the term "slow and fast" here is relative.

Embodiments Examples of the present invention will be described below with reference to the drawings.

The intermittent transfer device according to the present invention includes a fixed support member 1 disposed for each of a plurality of stations S existing at predetermined intervals in the transfer direction, and an object to be transferred when the upper surface is stationary and also disposed for each station S. Movable support member 2 located below the supported surface of A
, an upper back-and-forth moving member 4 to which the fully movable support member 2 is attached, extending in the front-back direction and having rails 3 on both sides and reciprocating between the station and the pitch, and an upper back-and-forth moving member 4 that receives each rail 3 Upper support rollers 5 that are movably supported are provided at predetermined intervals, and cam followers 7 are attached below the upper support rollers 5 and are arranged parallel to each rail 3 and extend in the front-rear direction. A vertically moving member 8 that rises to lift the transferred object A from the fixed support member 1, and each cam follower 7.
A lower back-and-forth moving member 10 is provided, which is arranged parallel to each rail 3 and extends in the front-back direction, and is driven by a fluid pressure cylinder 23, A lower support roller 11 that receives the straight horizontal lower surface 9f of the cam 9 directly below the follower 7 and supports the lower back-and-forth moving member 10 in a movable manner, and a rack 13 provided on the lower surface of the upper back-and-forth moving member 4; It consists of a pinion 14 mounted on the vertically moving member 8 and meshed with the rack 13 and driven by a reversible motor.
d, rear lower horizontal part 9e and front upper horizontal part 9d
and the upper steep slope section 9 that connects the lower rear horizontal section 9e.
a, an intermediate gentle slope part 9c and a lower steep slope part 9b are formed, and the cam follower 7 is positioned in the intermediate gentle slope part 9c when transferring an object between the fixed support member 1 and the movable support member 2. This is what it is designed to do.

The fixed support member 1 is a hollow fixed plate 1 arranged on the floor for each station S and is rectangular when viewed from a plane.
2 are fixed on an inverted L-shaped stand 18, which is erected in pairs on the left and right, three each in the front-rear direction, and has a horizontal portion extending inward. The upper back-and-forth moving member 4 has a hollow rectangular cross section with both side overhangs 4a formed on the upper and lower sides, and a rail 3 is provided between the upper and lower overhangs 4a. The movable support members 2 are arranged in pairs on the left and right sides of the upper longitudinally movable member 4 for each station S. It is fixed to The vertically movable member 8 is made of channel material with the opening side facing inward, and projects forward from the upper longitudinally movable member 4, and has a front end cam follower 7 attached to its front end. This front end cam follower 7 is external to the station. The upper support roller 5 is attached to the inside of the upper end of a support 6 provided on the vertically moving member 8. The cam followers 7, excluding the front end cam follower 7, are provided on the outside of the support column 6, and there are two pairs on the left and right sides of each station S, one on the front and one on the rear. In addition to the strut 6 with the cam follower 7, a strut 15 without the cam follower 7 at its lower end and having an upper support roller 5 at its upper end is appropriately arranged to support the upper back-and-forth moving member 4. In addition, pillars 6 and 15 are abolished,
The vertically moving member may be a plate having a width equal to the height of the support column. The pair of left and right vertically movable members 8 are connected behind the front end cam follower 7 by a connecting rod 16 having a square cross section. Both ends of the connecting rod 16 protrude outward from the lower back and forth moving member 10,
A guide roller 19 is provided on each end face.
The guide roller 19 is the left and right lower back and forth moving member 1
Front end fixed plate 1 outside the station on the outside of 0
It rolls up and down while being held between a pair of front and rear vertical guide plates 20 erected on the vertical guide plate 2, and guides the vertically moving member 8 to move straight. Lower back and forth moving member 10
is made of channel material with the opening side facing inward, and its front and rear parts protrude from the vertically movable member 8, and a front end cam 9 is attached to the front part. The front ends of the left and right lower longitudinally moving members 10 are connected by a connecting rod 21 having a square cross section. A rearward projecting piece 22 is fixed in the middle of the length of the connecting rod 21, to which the front end of a piston rod 24 of a hydraulic cylinder 23 is attached. The fluid pressure cylinder 23 is installed facing forward on the rear end fixed platen 12 outside the station. The lower support roller 11 has a slit 25 provided on the upper wall of the hollow fixed platen 12.
A portion of the cam 9 is fitted into the cam 9, and a portion of the cam 9 protrudes upward from the upper wall to receive the lower surface 9d of the cam 9. The horizontal portions of the left and right pair of inverted L-shaped bearings 26 are fixed to the upper edges on both sides of the slit 25, and the vertical portions are suspended within the slit 25, and the shaft of the lower support roller 11 is inserted into the hole drilled therein. is rotatably inserted.

Next, the operation of the intermittent transfer device according to the present invention will be described.

FIG. 1 shows a state in which all objects A to be transferred are supported on a fixed support member 1. As shown in FIG. From this state,
First, when the piston rod 24 of the hydraulic cylinder 23 is retracted, the lower longitudinally moving member 10 is retracted. Then, each cam follower 7 reaches the front upper horizontal part 9d from the rear lower horizontal part 9e of the cam 9 via the slope parts 9b, 9c, and 9a. As a result, the vertically movable member 8 rises, and in the process of rising, the movable support member 2 integrated with the vertically movable member 8 removes the transferred object A from the fixed support member 1, as shown in FIG. Lift up. At the moment when the transferred object A is transferred from the fixed support member 1 to the movable support member 2, the cam follower 7 is located on the gentle slope part 9c, so the cam follower 7 is located on the steep slope part 9a, 9b. The rate of rise will be slower than when

Second, the reversible motor is rotated forward to rotate the pinion 14 clockwise in FIG. 2, and the upper back-and-forth moving member 4 with the rack 13 meshed therewith is advanced by the station pitch.

Third, when the piston rod 24 of the hydraulic cylinder 23 is extended, the lower back-and-forth moving member 10 moves forward. Then, each cam follower 7 becomes the cam 9.
From the front upper horizontal part 9d to the slope parts 9a, 9c, 9b
and reaches the rear lower horizontal portion 9e. As a result, the vertically movable member 8 descends, and in the process of descending, the transferred object A is transferred from the movable support member 2 to each front station S.
Lower it onto the fixed support member 1 located at. At the moment when the transferred object A is transferred from the movable support member 2 to the fixed support member 1, the cam follower 7 is located on the gentle slope part 9c, as in the case of rising above, so the cam follower 7 is moved suddenly. The descending speed is slower than that located on the slope portions 9a and 9b.

Fourth, the pinion 14 is rotated in the opposite direction by rotating the electric motor in the opposite direction.
is rotated counterclockwise to move the upper back-and-forth moving member 4 backward by the station pitch. At this time, since the movable support member 2 is located below the transferred object A, there is no problem in the movement of the upper back-and-forth moving member 4.
In this way, one cycle of intermittent transfer is completed, and the same operation is repeated thereafter, and the required work is performed while the object to be transferred is stopped at the station. The stop time is set by a timer.

Effects of the Invention Since the intermittent transfer device of the present invention has the above-described configuration, by the operation of the lower back and forth moving member,
The object to be transferred is lifted up and lowered with respect to the fixed support member, and the object to be transferred can be moved intermittently by the operation of the upper back-and-forth moving member, and the object to be transferred can be stopped regularly for a fixed working time at each station. ,
Since the pinion rack operates one upper back and forth moving member, there is no possibility of the problems encountered with the prior art devices mentioned at the beginning.

In addition, the cam has an upper front horizontal part and a lower rear horizontal part, so when the upper longitudinally movable member moves forward, the cam follower moves to the upper front horizontal part, and when the upper longitudinally movable member moves back, the cam follower moves to the upper front horizontal part. Cam
The followers are located in the rear lower horizontal part, and the upper support rollers located above the cam followers support the rails of the upper longitudinally movable member, which together with the fact that the upper longitudinally movable member is stabilized. It is possible to move the vehicle forward and backward smoothly even when

Further, the cam has an intermediate gentle slope section between the upper steep slope section and the lower steep slope section, where the cam follower is located when transferring an object between the fixed support member and the movable support member. Therefore, the vertical movement speed of the vertically moving member is slower than at other times only when transferring the transferred object, and as a result, the impact on the transferred object during transfer is extremely small, causing the transferred object to sway and become unstable. Never.

In addition, since the upper support roller, cam follower, and lower support roller are vertically aligned, the load of the vertically moving member and the object to be transported is applied to the cam. Therefore, according to the present invention, there is an advantage that only the cam needs to be strengthened by hardening or the like. If the load is to be received by the lower longitudinally movable member, it is inevitably difficult to provide strength to the lower longitudinally movable member since the lower longitudinally movable member is elongated.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view before the device starts operating, FIG. 2 is a side view showing the state in which an object to be transferred is lifted, and FIG. 3 is a side view taken along the line - in FIG. An enlarged cross-sectional view, Figure 4 is the same as Figure 1.
It is an enlarged sectional view along the line. Note that both FIGS. 1A and 1B and FIGS. 2A and 2B are assembled front to back with the middle part omitted. 1... Fixed support member, 2... Movable support member, 3... Rail, 4... Upper back and forth moving member, 5... Upper roller,
7... Cam follower, 8... Vertical moving member, 9... Planar cam for elevation, 9a... Upper steep slope part, 9b... Lower steep slope part, 9c... Intermediate gentle slope part, 9d... Front upper horizontal part, 9e... Rear Lower horizontal part, 9f... linear horizontal lower surface of cam, 10... lower back and forth moving member, 11... lower support roller, 13... rack, 14... pinion,
S...Station, A...Object to be transferred.

Claims (1)

[Claims] 1 a fixed support member 1 arranged for each of a plurality of stations S existing at predetermined intervals in the transfer direction;
Similarly, a movable support member 2 is arranged for each station S and whose upper surface is lower than the supported surface of the transferred object A when stationary, and a fully movable support member 2 is attached and extends in the front-rear direction and has rails on both sides. 3 and reciprocating between the station and the pitch, and an upper support roller 5 which receives each rail 3 and supports the upper longitudinally movable member 4 in a movable manner at predetermined intervals. A vertically moving member in which a cam follower 7 is attached at a position below the upper support roller 5, is arranged parallel to each rail 3, extends in the front-rear direction, and ascends to lift the transferred object A from the fixed support member 1. 8, and a planar cam 9 for raising and lowering arranged to correspond to each cam follower 7, and arranged parallel to each rail 3 and extending in the front and back direction, and a lower front and back cam driven by a fluid pressure cylinder 23. Moving member 10
and a lower support roller 1 that receives the linear horizontal lower surface 9f of the cam 9 directly below each cam follower 7 and supports the lower back-and-forth moving member 10 in a movable manner.
1, a rack 13 provided on the lower surface of the upper longitudinally moving member 4, and a pinion 14 mounted on the vertically moving member 8 and meshed with the rack 13 and driven by a reversible electric motor. A front upper horizontal part 9d, a rear lower horizontal part 9e, an upper steep slope part 9a, an intermediate gentle slope part 9c, and a lower steep slope part 9b connecting the front upper horizontal part 9d and the rear lower horizontal part 9e are formed. , fixed support member 1
and an intermittent transfer device in which the cam follower 7 is positioned at the intermediate gentle slope section 9c when transferring the transferred object between the movable support members 2.