JPS5932367B2 - Slut conveyor for intermittent feeding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slat conveyor for intermittent feeding that can be conveniently used in assembly lines for various products, such as automobiles, and the main purpose of the present invention is to provide intermittent stopping at support points for conveyed objects set on the slat conveyor. The purpose of the present invention is to provide an intermittent feed slat conveyor with extremely high positional accuracy.

Hereinafter, preferred embodiments of the present invention will be described based on the attached illustrative figures. 1 is a freely movable slat conveyor,
Each slat 2 is connected endlessly by a roller chain 3 at its lower ends, each roller 4 of the roller chain 3 engages with a guide rail 5, and the roller chain 3 is connected with free gears at both ends of a conveyance path 60. It is hung on 7.

This freely movable slat conveyor 1 is provided with conveyed object support parts 9 equipped with conveyed object supporting jigs 8 at equal intervals, and one slat 2a belonging to each support part 9 has its own support parts 9. A secured portion 11 is formed by installing a rod-shaped body 10 between the chain links at both ends.

Furthermore, a length adjustment link 12 is interposed between each support portion 9.

This link 12 has a rotation operation part 13 in the center with left and right reverse threads.
It has an adjustment screw 14 with.

Reference numeral 15 denotes a reciprocating movable body that is guided via rollers 17 to a pair of left and right guide rails 16 constructed along the conveyance path 6, and is suspended between a drive gear 18 and an idler gear 19. The roller chain 20 is connected to the drive roller chain 20, and is horizontally reciprocated linearly within the same range as the distance between the supporting parts 9.

21 and 22 are guide rails of the roller chain 20.

The movable body 15 is provided with a locking device 23 .

This locking device 23 includes a pair of clamping pieces 26.27, each of which has one end pivotally supported on the movable body 15 by a support shaft 24.25 so as to be able to swing up and down, and which extend in opposite directions and intersect with each other. A slide cam 29 is provided on the lower side of both the holding pieces 26 and 27, which can be slid back and forth between a pair of side plates 28.

The slide cam 29 includes a protrusion 30 for pushing up the pair of clamping pieces 26 and 27 and holding the pair of clamping pieces 26 and 27 in an engaged position in which they clamp the engaged part 11 from the front and back;
The pair of clamping pieces 26.27 that are adjacent to the protrusion 30 in the conveyor conveyance direction are moved downward to separate the pair of clamping pieces 26.27 from the moving path of the engaged part 11 downward. It has a recess 31 for maintaining the detached position.

This slide cam is positioned by a spring roller 32 so that the protrusion 30 and the recess 31 are alternatively held at a predetermined position below the pair of clamping pieces 26, 27.

As is well known, this spring roller includes a roller that is pressed against the upper surface of the slide cam 29 by a spring, and by fitting this roller into a recess provided on the upper surface of the slide cam 29, unexpected movement of the slide cam 29 is prevented. to prevent

Reference numerals 33 and 34 designate cylinder/piston units as locking device control means, which are provided on the outside of both ends of the reciprocating path of the movable body 15, and are controlled by their piston rods 35 and 36, respectively. The slide cam 29 can be moved by pressing.

Reference numeral 37 denotes a slat position fixing means, which is provided at each position of each conveyed object support section 9 when the conveyor 1 is intermittently stopped, and a pair of slats that sandwich the rod-shaped body 10 forming the secured section 11 from the front and back. It is composed of clamp arms 3B and 39, an elevating member 40, trouble links 41 and 42 that connect both arms and the elevating member 40, and a cylinder/piston unit 43 that raises and lowers the elevating member 40. By lowering the clamp arms 3,
Reference numerals 8 and 39 sandwich the rod-shaped body 10 from the front and back, and the lifting member 40
By raising the pair of clamp arms 3B, 39
opens and retreats downward from the movement path of the rod-shaped body 10.

Next, the method of use and effect will be explained.

The state shown in FIG. 1 is the state immediately after the slat conveyor 1 has been driven by a constant stroke, and after this, each support portion 9 stopped at each stop position D-((() is fixed at a predetermined position by the slat position fixing means 37. Fixed precisely in position.

That is, as shown in FIG. 6, the elevating member 40 is raised by the cylinder/piston unit 43, and the rod-shaped body 10 belonging to each support portion 9 is clamped from the front and rear by the pair of clamp arms 3B and 39.

As shown in FIGS. 1 and 2, at the two stopping positions F and G, where the center portion of the rod-shaped body 10 is held between the pair of clamping pieces 26 and 27 of the locking device 23, as shown in FIG. As shown in FIG. 2, the position fixing means 37 may be provided at two locations on both sides of the locking device 23, and at one location in the center for the other locations.

At the same time as the above-mentioned slat position fixing action or immediately after the action is completed, the movable body 1 is in the forward movement completion position (i.e., the stop position G).
The cylinder/piston unit 33 adjacent to 5 is operated, and its piston rod 35 presses and moves the slide cam 29 rearward as shown in the imaginary line in FIG. Displace to position.

As a result, the pair of clamping pieces 26, 27 swing downward around the support shafts 24, 25 due to their own weight (or spring force), and assume a detached attitude with respect to the secured portion 11.

Next, as shown in FIG. 2, the driving roller chain 20 is reversed to move the movable body 15 to a predetermined position (one position before the stop position F).
Then, as shown in FIG. 3, the cylinder/piston unit 34 is operated to push the slide cam 29 on the movable body 15 forward by its piston rod 36.

As a result, the protrusion 30 of the slide cam 29 enters the lower side of the pair of clamping pieces 26, 27, and the pair of clamping pieces 26, 27
27 is pushed up, the pair of clamping pieces 26 and 27 take an engaging posture in which they clamp the secured portion 11 at the stop position F from the front and back.

At the same time, the cylinders of each slat position fixing means 37
The piston unit 43 is actuated to lower the elevating member 40, and the pair of clamp arms 38 and 39 are opened and retracted below the movement path of the rod-shaped body 10.

After that, the driving roller chain 20 is rotated in the normal direction to move the movable body 1.
In order to move the slat conveyor 1 forward by a predetermined stroke along the guide rail 16, the slat conveyor 1 is rotated in the conveying direction by a unit feed amount.

By repeating the above action, the conveyed object supported on each support part 9 is intermittently conveyed from stop position A to stop position H (stop positions A to C are not shown), and then to each stop position B. −
While the conveyor is stopped at G, a predetermined work is performed on it, and at the stop position H, it is carried out of the conveyor.

A common method for intermittent feeding of a slat conveyor is to use a motor to intermittently drive the gear wheels that suspend the conveyor chain with the slats attached. An error occurs in the stopping position.

That is, there is a drawback that the stopping position of the conveyed object support section provided on the slat varies depending on the elongation of the conveyor chain.

Furthermore, an intermittent feeding device (1) is configured to move the slat forward intermittently by an anti-back pusher that moves back and forth, and to prevent the slat that is moving forward from overrunning beyond a fixed position with a releasable stopper.
For example, in the intermittent feeding device described in Japanese Utility Model Application Publication No. 50-129771, the slat feeding speed by the pusher cannot be increased because of the shock caused by the collision with the stopper, and the pusher moves backward. When doing so, there is a risk that the stopped slats may move slightly backward due to friction.

In addition, the slat held between the pusher and the stopper is fixed at a fixed position, but all other slats are in a free state, so the stopping position is not constant due to the extension of the chino. There is also.

However, in the intermittent feed slat conveyor of the present invention, as shown in the embodiments, the slats of the freely movable slat conveyor are connected to the slats at equal intervals, and the slat conveyors are arranged linearly along the conveyance path. A movable body capable of horizontal reciprocating only is provided, and this movable body is provided with a pair of clamping pieces that can be opened and closed to sandwich the engaged portion from the front and back, and the movable body is moved in the same range as the unit feed length. a driving means for reciprocating movement; and a drive means for opening the pair of clamping pieces to a position where they are separated from the engaged portion when the movable body completes the forward movement, and opening the pair of clamping pieces to a position in which the movable body separates from the engaged part and when the return movement of the movable body is completed. a control means for closing the engaging portion to a position where it is held, and further positioning slats at least at appropriate intervals in the conveying path to sandwich the engaged portion from the front and back when the movable body returns. Since the slat position fixing means is provided, when the slat is moved forward, the pair of clamping pieces sandwich the secured portion of the slat from the front and back, so that the slat and the movable body are completely connected. Since the slat will not collide with the stopper at the forward limit position, no matter how fast the forward movement speed of the movable body is increased, the slat can be reliably sent at the speed. In addition, there is a high risk of shock to the slats at the forward limit position.

Furthermore, when the movable body moves backward, the slat is fixed by the slat position fixing means, and the pair of clamping pieces are opened and completely separated from the slat side, so the slat moves back due to friction. Movement is completely prevented.

Furthermore, the slats in a stopped state are forcibly fixed at multiple locations along the conveyance path by the slat position fixing means so that they cannot move forward or backward, so even if the conveyor chain that connects the slats stretches, The stopping position of the conveyed object supported on the slat can be made substantially accurately constant.

From the above, the slat conveyor of the present invention can be effectively utilized as a means for conveying objects on assembly lines and test lines.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 are schematic side views for explaining the operation, FIG. 3 is a side view of the main parts showing the state when the conveyor starts driving, and FIG. 4 is a side view of the conveyor. FIG. 5 is a side view of the main part showing the state when driving is completed, FIG. 5 is a longitudinal sectional front view of the main part, and FIG. 6 is a side view showing the slat position fixing means. 1... Freely movable slat conveyor, 2, 2a...
Slat, 6... Conveyance path, 8... Jig for supporting the transported object, 9... Transported object support part, 11... Engaged part,
15... Reciprocating movable body, 20... Drive roller chain, 23... Locking device, 26, 27... Clamping piece, 2
9... Slide cam, 30... Projection, 31... Recess, 32... Spring roller, 33, 34... Cylinder/piston unit, 37... Slat position fixing means, 38° 39 ...Crank arm, 43...
cylinder/piston unit.

Claims (1)

[Claims] 1. A movable body capable of only horizontal reciprocating movement in a straight line along the conveyance path is provided, with engaged parts arranged at equal intervals on the slats of a freely movable slat conveyor. a driving means for reciprocating the movable body in the same range as the unit feed length, including a pair of clamping pieces that can be opened and closed to clamp the joining part from the front and back; control means for opening the piece to a position in which it separates from the engaged part and closing the pair of clamping pieces to a position in which it clamps the engaged part when the movable body completes the return trip; A slat conveyor for intermittent conveyance, comprising slat position fixing means for fixing the slats at least at appropriate intervals along the conveyance path by sandwiching the engaged portion from the front and back when the movable body returns.