JPH0718509Y2 - Pallet positioning device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a pallet positioning device, and in particular, a pallet capable of reliably placing a pallet conveyed by a stacker crane or the like at a predetermined position of a setup table or an APC device. Positioning device.

[Conventional technology]

Use a stacker crane or the like to set up a pallet
When placing it on the APC device, a block that regulates the position in the plane direction was provided on the upper surface of the setup table, etc., and the pallet was placed while abutting against the block.

[Problems to be solved by the device]

However, according to the conventional pallet positioning device described above, when the gap between the pallet outer shape and the positioning block is small, the stacking crane positioning accuracy is poor, and the pallet may be placed on the block and tilted. was there.

Also, if the gap between the pallet outer shape and the positioning block is widened, it is meaningless to place the positioning block, and a positioning unit using another driving body for repositioning is required, which is costly. There was a problem from the other side.

The present invention has been proposed to solve the above problems, and its purpose is to accurately and accurately maintain a pallet conveyed by a stacker crane while maintaining a normal posture, and with a highly accurate setup table or APC device. An object of the present invention is to provide a pallet positioning device that can be placed at a predetermined position above.

[Means for Solving the Problems]

The present invention adopts the following means in order to solve the above problems. That is, a pallet positioning device for positioning a pallet for fixing an object to be conveyed on its upper surface at a normal position when the pallet is conveyed and lowered by a conveying means, and includes a base, an upper part of the base, and a pallet. A plurality of rolling members, each having a columnar structure vertically provided on both sides of the base along the transport direction, a spherical rolling member fixed to the upper part of the columnar structure, and having a rotatable shape, are provided on the rolling member. A slide base that is placed and on which the pallet is placed and movable in a horizontal plane, and urges the slide base in a direction parallel to the pallet transport direction and a direction orthogonal to the pallet transport direction, Slide base restoring means for restoring the slide base to a predetermined position when the pallet is removed from the slide base; A plurality of pallets are arranged so as to surround the pallet when placed on the pallet, and are fixed to the upper part of the columnar structure so as not to interfere with the slide base even if the slide base moves in the horizontal direction. A positioning block having a pallet abutting portion formed as an inclined surface for positioning the pallet conveyed by the conveying means at a normal position,
The pallet positioning device is characterized in that the pallet can be positioned at a normal position corresponding to the base.

[Operation] A pallet is conveyed by a stacker crane or the like and lowered onto the pallet positioning device. When the pallet is slightly deviated and lowered, a part of the pallet rides on the inclined surface of the positioning block and is inclined. One end of the lower surface of the pallet is placed on the slide base. If the pallet is placed on the slide base while tilted,
Since the slide base is freely movable in the plane, the other end of the lower surface of the pallet slides down the inclined portion of the positioning block, and the pallet is positioned at the normal position in the positioning block.

When the pallet on the pallet positioning device is conveyed to another device, the slide base is returned to the original position by the slide base restoring means and is in a standby state.

〔Example〕

An embodiment of the present invention will be described below in detail with reference to the drawings.

The pallet positioning device A of the present invention is a setup table as shown in FIGS. 1 and 2. Although this embodiment is applied to the setup table, it is not limited to the setup table, of course.
It is also applied when it is necessary to place a pallet such as an APC device with a certain degree of accuracy.

The pallet positioning device A includes a base 1, a columnar structure 3, a pallet regulating member 5, a pallet equalizing mechanism 7, a slide base restoring means 9 and the like as main elements.
Next, these will be described in order.

The base 1 is a housing 1 that is rotatable by a fixed base plate 11 mounted on the floor surface, a fixed shaft 12 fixed on the fixed base plate 11, and bearings 13 and 13 fitted on the fixed shaft 12.
4 and a swivel board 15 to which the housing 14 is fixed. Reference numeral 16 denotes a stopper pin that can be retracted and retracted for rotating the swivel board 15 for swiveling with the pallet at the time of setup after swiveling at a predetermined angle.

The columnar structure 3 includes a column body 31, a base plate 32, an upper plate 33, and ribs.
34 is constructed, and the base plate 32 is fixedly provided on the swivel substrate 15 of the substrate 1 described above by a plurality of bolts 35. The columnar structure 3 is arranged in the conveyance direction of the pallet P,
The stacker cranes S are provided on the left and right of the moving direction. The base plate 32 and the upper plate 33, which are formed in a rectangular shape in plan view, are fixed to the four pillar bodies 31, and the upper plate 33 is reinforced by the ribs 34.

On the upper part of the columnar structure 3, there is provided a pallet regulating member 5 for placing the pallet P conveyed by the stacker crane S at a predetermined position such as a setup table. The pallet regulating member 5 is provided so as to surround the four side surfaces of the pallet P. Then, the mounting plate 50, the ribs 51, and the mounting base 52 are constructed, and a plurality of positioning blocks 53 (hereinafter referred to as blocks 53) are mounted above the mounting plate 50 by bolts 54 so as to face the pallet P side. Install it in a more protruding state. In this way, the block 53 is provided with the block 53 protruding from the mounting plate 50.
This is so that the slide base 70 can move in the plane below the block 53 without interfering with the. The side surface of the pallet P of the block 53 is an inclined surface 53 that widens upward.
The block 53 is formed in a and is provided to face each other. 55 is the block 53 and mounting plate
It is a pin to prevent the position of 50 from changing. The entire pallet regulating member 5 is fixed to the upper plate 33 of the columnar structure 3 with bolts 56.

Between the upper plate 33 of the columnar structure 3 and the block 53 of the pallet regulating member 5, a pallet equalizing mechanism 7 for mounting the pallet P conveyed by the stacker crane S is provided. This palette equalization mechanism 7
Is composed of a slide base 70, a ball caster 71 as a rolling member, etc., as shown in FIGS. 1, 2 and 4, and a pallet P conveyed by a stacker crane S is placed in a plane. It should be placed with a slight shift. Two sets are provided corresponding to the left and right columnar structures 3.

The slide base 70, which is larger than the width of the pallet P and has a margin, can move in the direction in which the horizontal component of the load is applied when the pallet P is placed on the slide base 70. It is placed free on the ball. This will be described with reference to the principle diagram shown in FIG. One end of pallet P is slide base 70
If it is placed on the pallet P and the other end of the pallet P is placed on the inclined surface 53a of the block 53, the pallet P tilts and a horizontal component force F ₁ of the load W of the pallet P is generated, and the pallet P slides down. Try to be horizontal. At this time, the reaction force (friction force) that prevents sliding at the point A (although it also occurs at the point B).
, The pallet P remains tilted. Therefore,
If the base supporting point A is made movable, the reaction force (friction force) generated at point A disappears, pallet P slides smoothly on ball caster 71, and the other end blocks.
It slides down the inclined surface 53a of 53 and becomes horizontal. The present invention uses this principle.

The ball caster 71 is attached to the upper plate 33 of the columnar structure 3 by screwing the bolt portion of the ball caster 71. A plurality of ball casters 71 are provided so that the ball casters 71 can smoothly move even if the load of the pallet P is received. A protective cover 72 is attached to the periphery of the slide base 70 with screws 73 to protect the ball casters 71 and the slide base restoring means 9 described below.

Since the slide base 70 is free to move in a plane by the ball casters 71, this free movement is regulated to some extent, and when the pallet P is not on the slide base 70, the whole pallet P is prepared. It is necessary to always keep the slide base 70 at a constant position so that the amount of movement in the direction becomes substantially constant. Therefore, the slide base restoring means 9 is provided between the lower surface of the slide base 70 and the upper plate 33 of the columnar structure 3. The slide base restoring means 9 includes a bracket 90, a slide pin 91, and a support bracket.
It is composed of 92, spring 93 and the like.

First, a bracket 90 having a V shape is attached to the lower surface of the slide base 70 with bolts 94. The bracket 90 is mounted so that the longitudinal direction thereof is in the left-right direction as a whole, and the mounting hole into which the bolt 94 is inserted is formed with a long hole 90a that is long in the left-right direction. On the other hand, two L-shaped support brackets 92 are attached to the upper plate 33 of the columnar structure 3 by bolts 95 so that the L-shaped pieces face each other. A hole is formed in the raised piece of the support bracket 92, and a slide pin 91 having a flange portion 91a is fitted in the hole in parallel with the slide direction of the slide base 70. The slide pin 91 moves from the support bracket 92 to the contact portion 91.
The protrusion b is formed so that the collar portion 91a comes inside the support bracket 92. Further, the tip of the slide pin 91 is provided so as to penetrate the support bracket 92 on the opposite side. A spring 93 is wound around the slide pin 91 between the collar portion 91a and the support bracket on the opposite side. This slide pin 91
The abutting portion 91b comes into contact with the bent piece of the bracket 90 on the lower surface of the slide base 70 described above.

Two slide pins 91 as described above are attached to the support bracket 92 in parallel with their directions reversed. That is, if the abutting portion 91b of one slide pin 91 abuts on the left side of the bracket 90 attached to the lower surface of the slide base 70, the abutting portion 91b of the other slide pin 91 is It is skewed to abut the right side of the bracket 90. Therefore, if the slide base 70 moves to the left in FIG. 2, the plate on the right side of the bracket 90 moves by pushing the contact portion of one slide pin 90, and if the slide base 70 moves to the right, the bracket 90 The plate on the left side of the table moves by pushing the contact portion 91b of the slide base 70 on the front side in the figure.

The same mechanism as that described above is also provided in the depth direction of the slide base 70 (vertical direction in FIG. 1). That is, as shown in FIGS. 1 and 3, the slide base restoring means 9 described above is provided with its longitudinal direction parallel to the conveying direction of the pallet P (the arrow Z direction in FIG. 1).

Next, the operation of the pallet positioning device configured as described above will be described.

The pallet P is conveyed by the stacker crane S and is lowered onto the setup table which is a pallet positioning device. Stopping accuracy of stacker crane S is poor and pallet P
Even when the pallet P is dropped on the setup table with some deviation, a part of the lower end of the pallet P abuts a part of the plurality of blocks 53 of the pallet regulating member 5. The other end of the pallet P contacts the slide base 70 by tilting due to its own weight or the like. Since the slide base 70 can be freely moved in the plane direction by the ball casters 71, the lower end of the pallet P that abuts the block 53 of the pallet regulating mechanism 5 slides down the inclined surface 53a of the block 53, and the pallet is placed on the slide base 70. The entire P is placed. The placed state is a state of being positioned in the pallet regulation mechanism 5, and the pallet P is placed on the setup table with high accuracy.

When the pallet P is conveyed again by the stacker crane S to convey it to the machine side or the like, the slide base 70 is returned to a predetermined original position by the action of the slide base restoring means 9. After that, the same operation is repeated.

[Effect of device]

Since the present invention is configured as described above,
The following effects can be expected.

The pallet conveyed by the stacker crane or the like may be placed on the positioning block before being accurately placed on the slide base. However, even in this case, if one end of the pallet is placed on the slide base, the slide base moves within the plane due to the component force of the load of the pallet because the pallet equalizing mechanism does not generate frictional force. The pallet is placed horizontally on the slide base which is slid down on the inclined surface of the positioning block and is positioned in the positioning block. Therefore, even if the positioning accuracy of the stacker crane or the like is somewhat poor, the pallet is always positioned at a predetermined position with high accuracy, improving setup efficiency, and positioning can be performed with a simple device, which has a large economic effect. .

[Brief description of drawings]

1 to 5 respectively show an embodiment of the present invention, FIG. 1 is an overall plan view, and FIG. 2 is a partial sectional front view,
3 is a view taken in the direction of arrow I in FIG. 1, FIG. 4 is a sectional view taken along the line II-II in FIG. 1, and FIG. 5 is a principle view of the pallet equalizing mechanism. In the figure, 1 ... Base, 3 ... Columnar structure, 5 ... Pallet regulating member, 7
... pallet equalizing mechanism, 9 ... slide base restoring means, 31 ... pillar body, 53 ... block, 53a ... inclined surface, 70 ... slide base, 71 ... ball caster (rolling member), 90 ...
Bracket, 91 ... Slide pin, 91a ... Brim part, 91b ... Abutting part, A ... Pallet positioning device.

Claims (1)

[Scope of utility model registration request] 1. A pallet positioning device for positioning a pallet for fixing an object to be conveyed on its upper surface at a normal position when the pallet is conveyed and lowered by a conveying means, and includes a base and an upper part of the base. In addition, a columnar structure that is erected on both sides of the base along the pallet conveying direction, a plurality of rolling members that are fixed to the upper part of the columnar structure, and that have rotatable spherical rolling elements, and the rolling members. A slide base placed on a member, on which the pallet is placed, and movable in a horizontal plane, and the slide base is urged in a direction parallel to the pallet transport direction and a direction orthogonal to the pallet transport direction. A slide base restoring means for restoring the slide base to a predetermined position when the pallet is removed from the slide base; A plurality of pallets are arranged so as to surround the pallet when placed on the base, and fixed to the upper part of the columnar structure so as not to interfere with the slide base even if the slide base moves in the horizontal direction. And a positioning block having a pallet abutting portion formed as an inclined surface for positioning the pallet conveyed by the conveying means at a normal position, and positioning the pallet at a normal position corresponding to the base. A pallet positioning device characterized by being able to do so.