JPS6240984Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pallet conveyor that allows the pallets to be released from the conveyor at a working position in the middle of the conveyor, so that the conveyor vibrations are not transmitted and the pallet is in a completely stationary state. It is.

Generally, when assembling and manufacturing precision machinery or electrical products using assembly line operations, semi-finished products are sequentially transferred on a pallet conveyor, and the pallets are stopped at predetermined positions to perform various operations. When accuracy is required, it is necessary to separate the conveyor from the conveyor and keep it in a completely stationary state without vibration.

The present invention was developed in view of the above points, and when the pallet is sent to a predetermined position by the transfer device, the pallet mounting table rises and is placed on it.
The pallet is clamped and fixed from both sides by the locking part and the fixing part provided on the pallet mounting table, and the pallet mounting table is set so that the pallet is released from the transfer device such as a chain, so that the pallet is completely stationary. It was designed to become the state.

An embodiment of the pallet conveyor according to the present invention will be described below with reference to the drawings.

In the figure, 1 is a stationary device, and this stationary device 1
is provided between a pair of transfer devices 3 for placing and transferring the pallets 2, and this transfer device 3 is provided inside the conveyor bodies 4, 4.

The stationary device 1 is provided with a pallet mounting table 5 on which a pallet 2 is placed and lifted;
This pallet mounting table 5 is formed into a rectangular shape that is longer than the pallet 2 in the transport direction and shorter in the direction perpendicular to the pallet 2. A locking part 6 protruding upward is fixedly attached to the front part, and a guide groove 9 of the clamping part 8 fits into a groove 7 provided in the transfer direction at the rear part, so that the cylinder 10 Advance and retreat movements are now controlled. Further, the pallet 2 is formed with triangular notches 11 and 12 at the front and rear ends for close engagement with the locking portions 6 and the clamping portions 8. It is designed to be held between triangular protrusions. A vertical shaft 13 that can move forward and backward up and down is fixed to approximately the center of the lower surface of the pallet mounting table 5.
The vertical movement is controlled by a cylinder 15 fixed to the machine frame 14. Further, guide shafts 16, 16 are fixed to the pallet mounting table 5 at positions in front and rear of the vertical shaft 13, and the guide shafts 16 are inserted into bearings 17 fixed to the machine frame 14, and the pallet mounting table 5 is It is designed to guide vertical movement. Further, an operating body 18 is provided at the lower end of one of the guide shafts 16, 16, and the guide shaft 1
Switches 19 and 20 are installed in two stages parallel to 6.
It is designed to turn on and off. Among these, the upper switch 19 is provided at a position where only the locking portion 6 comes into contact with the actuating body 18 when the transfer device 3 is projected upward, and the lower switch 20 is provided at a position where the locking portion 6 is placed below the transfer device 3. It is provided at a position where it comes into contact with the actuating body 18 when it is in the position. Further, at the rear of the stationary device 1, that is, close to the direction in which the pallets 2 are sent, a stopper 22 that moves up and down by a cylinder 21 is provided as shown in FIG. 6, and a passing position detection switch 23 is provided. is provided. Further, a stationary position detection switch 24 is provided at the tip of the stationary position of the pallet 2.

The transfer device 3 has running rail support plates 25, 25 provided on the conveyor bodies 4, 4, and a forward side 27 and a backward side 28 on the rails 26, 26 on the running rail support plates 25, 25. A chain 29 connected in an annular manner is mounted, and this chain 29 is driven by a motor (not shown) via sprockets at both ends. Also this chain 2
9, running wheels 30 running on the rails 26 are successively connected to each other by connecting plates 31 on the inside thereof, and mounting rollers 32 for placing the pallets 2 on the outside thereof are provided at predetermined intervals. Note that this mounting roller 32 does not come into contact with the traveling rail support plate 25 and is suspended in the air when the chain 29 is running.

Next, the operation of the device according to the present invention will be explained.

First, it is assumed that the pallet mounting table 5 is stopped at the position a in FIG. At this time, only the locking portion 6 protrudes from the placement roller 32. Also,
Since the switch 19 is turned on by the operating body 18, the stopper 22 is lowered.

When the stopper 22 is lowered, the pallet 2 starts moving forward, and at the same time the switch 23 is turned on and the pallet 2
When the cylinder 21 passes and is turned off, the cylinder 21 is activated and the stopper 22 is raised to stop the pallet 2 to be sent next.

The pallet 2 that has moved forward is stopped when the notch 11 engages with the locking portion 6. At this time, when pallet 2 contacts switch 24 and turns on, cylinder 1
5 is activated, the pallet mounting table 5 rises, and the pallet 2 is moved from the mounting roller 32 to the pallet mounting table 5.
The robot then changes to the position shown in Fig. 6b and stops at the position shown in Fig. 6b. At the same time, the clamping portion 8 slides inward due to the operation of the cylinder 10 and engages with the notch 12, so that the pallet 2 is completely clamped and fixed on the pallet mounting table 5.

In this manner, various operations such as assembly are performed while the pallet 2 remains stationary and fixed floating above the transfer device 3.

After the work is completed, a switch (not shown) is turned on to operate the cylinders 10 and 15, lowering the pallet mounting table 5, and sliding the clamping portion 8 out of engagement with the notch 12. When the pallet mounting table 5 comes below the mounting roller 32, the pallet 2
is transferred to the placement roller 32 and is transferred by the drive of the chain 29. When the pallet mounting table 5 is further lowered and the operating body 18 turns on the switch 20, it reaches the position shown in FIG. 6c.

When the switch 20 is turned on, the operation of the cylinder 15 is reversed and the pallet mounting table 5 is raised, and when the switch 19 is turned on, it returns to the initial position a. Then, the cylinder 21 is operated, the stopper 22 is lowered, the next pallet 2 is fed, and the same operation is repeated.

Since the present invention is constructed as described above, the pallet is released from the transfer device and stops, and the pallet becomes stationary without any vibrations being transmitted to the pallet. In addition, triangular notches are provided at the front and rear ends of the pallet, and a rear-facing three-way cutout is provided at the front end of the pallet mounting table.
A square convex part is provided, and a forward-facing triangular convex part is provided on the holding part at the rear end of the pallet mounting table, so even if a position shift occurs while the pallet is being conveyed by the transfer device, the triangular convex part is Accurate positioning is achieved by engagement between the notch and the protrusion. Therefore,
Suitable for automatic assembly and detailed work. Furthermore, the structure is simple and can be provided at low cost.

[Brief explanation of drawings]

Fig. 1 is a partial side view of an embodiment of the pallet conveyor according to the present invention, Fig. 2 is a front view of the same, and Fig. 3 is a partial side view of an embodiment of the pallet conveyor according to the present invention.
4 is a perspective view of the pallet mounting table, FIG. 5 is an exploded perspective view of the pallet mounting table, and FIG. 6 is an explanatory view of the operation. DESCRIPTION OF SYMBOLS 1... Stationary device, 2... Pallet, 3... Transfer device, 4... Conveyor main body, 5... Pallet mounting table, 6... Locking part, 8... Holding part, 10... Cylinder, 15... ...Cylinder, 19, 20, 24...
Switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A conveyor body in which a pallet is placed and transferred by a transfer device provided between pallet guides, and the pallet is held still by a stationary device provided at a predetermined location along the way, The apparatus includes a pallet mounting table on which the pallet is placed, and a pallet mounting table which is placed at three positions: below the transfer device, at an intermediate position slightly lower than the pallet transfer position by the transfer device, and at a position above the transfer device. It is equipped with a vertical movement means that moves up and down to a position, and a clamp means that is provided on the pallet mounting table and clamps and fixes the placed pallet, and the vertical movement means includes a vertical shaft fixed to the pallet mounting table; It consists of a cylinder that moves the vertical axis up and down, a switch located at the front of the pallet mounting table to control the operation of this cylinder, and a switch that sets the pallet mounting table in three positions. The means includes a locking portion having a triangular convex portion facing backward and fixedly provided on the upper surface of the front end of the pallet mounting table so as to protrude from the pallet when the pallet mounting table is raised to the intermediate position; a clamping part having a forward triangular convex portion that is movably provided on the upper surface of the rear end of the pallet mounting base so as to be located slightly below the pallet when the mounting base is raised to the intermediate position; The pallet is fixed by engaging with the triangular notches formed at the front and rear ends of the pallet by the triangular convex parts of the locking part and the holding part. A pallet conveyor featuring: