JP2009166469A - Anti-slip material pressure bonding roller device in pallet anti-slip material welding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve cooling performance for a pressure bonding roller whose temperature rises when welding a pallet and anti-slip material. <P>SOLUTION: A roller (constituted of a pressing roller 31 and collars 48 and 48) is formed to be hollow, and is supported to be turnable by a center shaft (mount shaft 41) fit to the roller nearly coaxially. A cooling liquid supply path (holes 42 and 44) whose exit is opened to the outer peripheral surface of the center shaft, so as to supply cooling liquid for cooling the roller to space between the inner peripheral surface of the roller and the outer peripheral surface of the center shaft by passing through the inside of the center shaft is formed, and a cooling liquid discharge path (holes 43 and 45) whose entrance is opened to the outer peripheral surface of the center shaft, so as to discharge the cooling liquid with which the roller has been cooled by passing through the inside of the center shaft is formed. A sealing member (O-ring 52) for sealing the space between the inner peripheral surface of the roller and the outer peripheral surface of the center shaft is provided on an entrance side of the cooling liquid supply path or an exit side of the cooling liquid discharge path out of both sides holding the exit of the cooling liquid supply path and the entrance of the cooling liquid discharge path in the width direction of the roller in between. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an anti-slip material pressure roller device in a welding device for welding an anti-slip material for preventing slipping of a load to a synthetic resin pallet used for transporting and storing the load in a state of being loaded on a loading surface. More specifically, the present invention relates to a technique for improving the cooling performance of the pressure roller that raises the temperature when melting the pallet and the anti-slip material.

In general, many plastic pallets, which are superior in terms of durability, hygiene, and the like compared with wooden pallets, are used for transporting and storing cargos in a state of loading them on the loading surface.
However, the synthetic resin pallet has a problem that the load loaded on the loading surface is slippery, and in order to prevent this slipping, the loading surface of the synthetic resin pallet has a large friction coefficient such as thermoplastic resin or synthetic rubber. A method of welding a non-slip material of a band-like body or a string-like body is taken.

In such an anti-slip material welding apparatus described in Patent Document 1, a plurality of anti-slip materials are respectively provided on the substantially square stacking surface of the synthetic resin pallet, and the longitudinal direction of each non-slip material welding device is an edge of the stacking surface. Welded to be parallel.
In the above welding, hot air is blown by a hot air gun or the like between the back surface of the anti-slip material and the anti-slip material welding surface of the pallet to melt both, and the anti-slip material is moved by a pressure roller while moving the pallet. It is done by pressing.

  By the way, in the thing of patent document 1, when the said pressure roller heats up with a hot air, an anti-slip | skid material will fuse | melt by the press of a high temperature pressure roller, and it will produce adhesion with a pressure roller, and this. As a result, there is a concern that the welding strength between the anti-slip material and the anti-slip material welding surface of the pallet may decrease, or the surface of the anti-slip material after welding may become fluffy and the quality of the pallet may deteriorate.

Therefore, in the device described in Patent Document 1, air is supplied to the inside of the hollow pressure roller, and the pressure roller is air-cooled, thereby avoiding melting of the anti-slip material due to the pressure of the pressure roller, and pressure bonding of the anti-slip material. Trying to prevent sticking to the roller.
JP 2004-114325 A

However, in the one described in Patent Document 1, the pressure roller cannot be sufficiently cooled by air cooling, and the melting of the anti-slip material due to the pressure of the pressure roller cannot be surely avoided.
The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a non-slip material pressing roller device capable of improving the cooling performance of the pressing roller.

  For this reason, the present invention blows hot air to the anti-slip material fed from the anti-slip material supply device and the welding surface of the anti-slip material of the pallet to melt them, and the roller rolls against the anti-slip material. In the anti-slip material pressing roller device in the anti-slip material welding device for welding the anti-slip material to the welding surface of the pallet by pressing the anti-slip material to the pallet while in contact, the roller is formed in a hollow shape And is rotatably supported by a central shaft fitted in the roller in a substantially coaxial state, and an outlet is opened in the outer peripheral surface of the central shaft, passes through the inner portion of the central shaft, and passes through the inner periphery of the roller. A cooling liquid supply passage for supplying a cooling liquid for cooling the roller is formed between the surface and the outer peripheral surface of the central shaft, and an inlet is opened in the outer peripheral surface of the central shaft and passes through the inner portion of the central shaft. And said Forming a cooling liquid discharge passage for discharging the cooling liquid after the cooling of the roller, and the cooling liquid out of both sides sandwiching the outlet of the cooling liquid supply path and the inlet of the cooling liquid discharge path in the width direction of the roller A seal member that seals between the inner peripheral surface of the roller and the outer peripheral surface of the central axis is provided on the inlet side of the liquid supply passage or the outlet side of the coolant discharge passage.

With the above configuration, the roller formed in a hollow shape is rotatably supported by the central axis that is fitted into the roller in a substantially coaxial state.
The coolant supply passage supplies the coolant for cooling the roller between the inner peripheral surface of the roller and the outer peripheral surface of the center shaft through the inside of the center shaft, and the coolant discharge passage is at the center. The coolant after cooling the rollers is discharged through the shaft.

  Further, a seal member is provided on the side of the cooling liquid supply passage or the outlet side of the cooling liquid discharge passage among both sides sandwiching the outlet of the cooling liquid supply passage and the inlet of the cooling liquid discharge passage in the width direction of the roller. Provided. This seal member seals between the inner peripheral surface of the roller and the outer peripheral surface of the central shaft.

The first embodiment of the present invention will be described below.
The anti-slip material welding apparatus for a pallet according to the present embodiment welds a non-slip material of a belt-like body or a string-like body such as a thermoplastic resin or a synthetic rubber having a large friction coefficient to the loading surface of the synthetic resin pallet, This prevents slipping of the luggage loaded on the loading surface of the pallet.
FIG. 1 is an explanatory perspective view showing an example of a synthetic resin pallet having a non-slip material welded to its surface.

The pallet P shown in FIG. 1 is a four-way pallet having struts 1, 2 and 3 at the four corners, the middle and the center thereof, and a fork insertion hole 4 between the struts. A belt-like or string-like anti-slip material S is welded with its longitudinal direction parallel to the edge of the pallet P.
FIG. 2 shows a main part of the anti-slip material welding apparatus according to the present embodiment.

As shown in FIG. 2, the anti-slip material welding device first moves the pallet P placed on the conveyor device 5 in the left direction in the figure, while being fed from the anti-slip material supply device and passed through the guide tube 6. Hot air is blown from the hot air gun 7 between the stopper material S and the anti-slip material welding surface of the pallet P to melt the anti-slip material S and the anti-slip material welding surface of the pallet P.
And the anti-slip | skid material S is welded to the anti-slip | skid material welding surface of the pallet P by pressing the anti-slip | skid material S to the pallet P with the press roller 30 attached to the raising / lowering rod 10.

Note that the anti-slip material S can be pressed against the stacking surface of the pallet P by moving the pressure roller 30 and the hot air gun 7 in the same direction while the pallet P is stationary.
FIG. 3 is a cross-sectional view of the anti-slip material pressing roller device.
The anti-slip material pressure roller device is attached to a welding device main body and includes a lifting rod 10 that can be moved up and down and a pressure roller 30.

As shown in FIG. 3, the lower part of the lifting rod 10 is formed by bearing parts 10 a and 10 a that face in the horizontal direction (the left-right direction in the figure), and the pressure roller 30 is inserted between the bearing parts 10 a and 10 a.
The attachment shaft 41 of the pressure roller 30 has holes 42 and 43 formed in parallel to each other at different positions in the axial direction (the left-right direction in the drawing) through the attachment shaft 41 along the diameter. Yes.

The hole 44 extends from the center of the hole 42 in the penetrating direction along the axis of the mounting shaft 41 in the direction opposite to the hole 43 side, and the tip of the hole 44 is one end surface of the mounting shaft 41 in the axial direction. It is open to.
Similarly, the hole 45 extends from the center in the penetration direction of the hole 43 along the axis of the mounting shaft 41 in the direction opposite to the hole 42 side, and the tip of the hole 45 extends in the axial direction of the mounting shaft 41. Opened to the other end surface.

Outer ends of the mounting shaft 41 are cut out in the circumferential direction from the both holes 42 and 43 in the left-right direction in the figure, and endless and annular grooves 47 and 47 are formed.
In addition, annular collars 48 and 48 are disposed around the mounting shaft 41 outwardly in the left-right direction in the drawing from both holes 42 and 43.
The inner peripheral surfaces of the collars 48 and 48 cover the grooves 47 and 47, so that the spaces 36 and 36 according to the present invention are partitioned.

A slight gap is formed between the inner peripheral surface of the collars 48 and 48 and the portion of the outer peripheral surface of the mounting shaft 41 that faces the inner peripheral surface of the collars 48 and 48 outside the grooves 47 and 47. Is formed. For this reason, the collars 48 are rotatable with respect to the mounting shaft 41.
The bottom surfaces of the grooves 47 and 47 and the inner peripheral surfaces of the collars 48 and 48 are processed into a mirror shape.
The mirror processing on the bottom surfaces of the grooves 47 and 47 is performed by inserting a polishing tool or the like into the grooves 47 and 47 from the outside before the press roller 30 is assembled. Therefore, the mirror finish can be easily performed even when the dimensions of the grooves 47 and 47 of the mounting shaft 41 are small.

Further, the mirror finish on the inner peripheral surfaces of the collars 48 and 48 is performed by inserting a polishing tool or the like inside the collars 48 and 48 before the press roller 30 is assembled. Here, since the collars 48 are larger in the radial direction than in the axial direction (the left-right direction in FIG. 3), the mirror finish can be easily performed even when the collars 48 are small. It can be carried out.
Here, in the spaces 36, 36, annular O-rings 52, 52 (seal members) that seal between the mirror-like bottom surfaces of the grooves 47, 47 and the mirror-like inner peripheral surfaces of the collars 48, 48 are sealed. ) Is accommodated along the shape of the annular spaces 36 and 36.

At the same time, a lubricant is injected into the spaces 36 and 36. As this lubricant, it is preferable to use a viscous and water-insoluble one such as cream grease.
On the other hand, the pressure roller 31 of the pressure roller 30 has an annular recess 33 formed by recessing the inner peripheral surface of the center portion in the width direction (the left-right direction in the drawing) toward the outer periphery over the entire periphery.
Endless and annular grooves 46 and 46 are formed on both the left and right sides of the depression 33 in the figure by cutting out the inner peripheral portion of the pressing roller 31 in the circumferential direction.

In the grooves 46, 46, annular O-rings 51, 51 (second seal members) are accommodated along the shape of the annular grooves 46, 46.
Bearings 35, 35 are mounted coaxially with the pressing roller 31 on the inner peripheral surface of the pressing roller 31 outward in the horizontal direction in the figure from the grooves 46, 46.
In this configuration, when the pressure roller 30 is assembled, first, the mounting shaft 41 in which the lubricant is injected into the spaces 36 and 36 and the O-rings 52 and 52 and the collars 48 and 48 are mounted is attached to the O-rings 51 and 51. And the press roller 31 fitted with the bearings 35, 35.

Then, between the inner peripheral surface of the bearings 35 and 35 and the outer peripheral surface of the mounting shaft 41, substantially annular collars 32 and 32 having flange portions 32 a and 32 a formed at one end in the axial direction are attached to the mounting shaft 41. The pressure roller 31 can be rotated around the mounting shaft 41 via the bearings 35 and 35 by inserting and interposing from the outside in the left-right direction in the figure so as to be substantially coaxial.
At this time, the flange portions 32a and 32a are locked by the lateral surfaces of the bearings 35 and 35 on the outer side in the horizontal direction in the figure.

The pressure roller 30 assembled as shown in FIG. 3 is in the following state.
First, an annular and large-capacity cavity 50 that is substantially coaxial with the pressing roller 31 is formed between the inner peripheral surface in the recess 33 of the pressing roller 31 and the outer peripheral surface of the mounting shaft 41.
Further, both end portions of the holes 42 and 43 face toward the cavity 50.

Furthermore, the collars 48 and 48 cover the grooves 46 and 46 with the outer peripheral surfaces thereof in a state of being substantially coaxial with the pressing roller 31.
The O-ring 51 seals between the bottom surfaces of the grooves 46 and 46 and the outer peripheral surfaces of the collars 48 and 48.
Furthermore, in the present embodiment, the lubricant is injected into the spaces 36, 36, and the bottom surfaces of the grooves 47, 47 and the inner peripheral surfaces of the collars 48, 48 are processed into a mirror surface, so that an O-ring is used. Even when the pin 52 is sandwiched between the bottom surfaces of the grooves 47 and 47 and the inner peripheral surfaces of the collars 48 and 48 and receives a compressive force, the frictional force between them is sufficiently reduced.

Therefore, the collars 48 and 48 can be easily rotated relative to the mounting shaft 41 even if the O-ring 52 is interposed between the collar 48 and the mounting shaft 41, whereby the pressing roller 31 and the mounting shaft 41 ( The force (hereinafter simply referred to as a force required for relative rotation) to be applied to the outer peripheral surface of the pressing roller 31 in order to relatively rotate the elevating rod 10) is also greatly reduced.
In this way, the force required for the relative rotation becomes smaller than the static friction force between the pressing roller 31 and the anti-slip material S pressed against the press roller 31, and the anti-slip material as shown in FIG. When the pallet P moves in a state where S is pressed by the pressing roller 31, the pressing roller 31 can easily make rolling contact with the anti-slip material S.

The collars 48 and 48 and the pressing roller 31 constitute a roller according to the present invention.
In order to attach the pressure roller 30 assembled as described above to the lifting rod 10, the mounting shaft 41 is fixed in a state where it passes through the bearing portions 10 a, 10 a on the left and right sides of the lifting rod 10.

As a result, the pressing roller 31 can rotate relative to the mounting shaft 41 and the lifting rod 10.
Here, cooling water (cooling liquid) for cooling the pressing roller 31 heated by hot air from the hot air gun 7 in FIG. 2 is supplied from the right end of the hole 44 in the drawing by driving a pump or the like (not shown). The cooling water after cooling of the pressing roller 31 is discharged from the left end of the hole 45 in the figure.

The cooling water discharged from the hole 45 is preferably supplied to the hole 44 again after being radiated and circulated.
According to such a configuration, as shown in FIG. 2, the anti-slip material welding device is fed out from the anti-slip material supply device and moves through the guide tube 6 while moving the pallet P placed on the conveyor device 5 in the left direction in the figure. By blowing hot air from the hot air gun 7 between the anti-slip material S and the anti-slip material welded surface of the pallet P, the anti-slip material S and the anti-slip material welded surface of the pallet P are illustrated on the left side. It melts in order from this part.

Then, while the pressing roller 31 of the pressure roller 30 is in rolling contact with the anti-slip material S, the anti-slip material S whose back surface is melted by the press roller 31 is transferred to the melted anti-slip material welding surface of the pallet P. The anti-slip material S is welded to the anti-slip material welding surface of the pallet P by sequentially pressing from the left side of FIG.
At this time, as shown by the arrows in FIG. 3, cooling water is supplied from the right end of the hole 44 in the drawing, and this cooling water reaches the cavity 50 through the holes 44 and 42, and from the hot air gun 7. The heat is absorbed from the pressure roller 31 heated by the hot air. In particular, the cooling water absorbs much heat from the portion near the cavity 50 in the outer peripheral portion thereof, that is, the central portion in the width direction pressing the anti-slip material S and the vicinity thereof.

As a result, the pressing roller 31 presses the anti-slip material S while effectively cooling it, and the welding strength between the anti-slip material S and the anti-slip material welding surface of the pallet P can be improved.
At the same time, since the anti-slip material S can avoid melting due to contact with the heated pressure roller 31, adhesion with the pressure roller 31 is prevented, and adhesion between the pallet P and the anti-slip material S is further strengthened. be able to.

Cooling water that is supplied to the cavity 50 and absorbs heat from the pressing roller 31 passes through the hole 43 and the hole 45 in this order, and is discharged from the left end of the hole 45 in the drawing, and after radiating heat, again on the right side of the hole 44 in the drawing. Supplied from the end.
At this time, the O-ring 51 seals between the inner peripheral surface of the pressing roller 31 and the outer peripheral surface of the collars 48 and 48, and the O-ring 52 is connected to the outer peripheral surface of the mounting shaft 41 and the inner peripheral surfaces of the collars 48 and 48. Therefore, it is possible to prevent the cooling water in the cavity 50 from leaking between the mounting shaft 41 and the pressing roller 31.

  Here, the gap between the outer peripheral surface of the mounting shaft 41 and the inner peripheral surface of the collars 48 and 48 is small, the lubricant in the spaces 36 and 36 is viscous and water-insoluble, and the space 36, 36, even if cooling water enters from the cavity 50 side through the gap 50, the water pressure acts outward in the width direction of the pressing roller 31, so that the lubricant passes through the gap 50 side. There is almost no leaking out.

Further, since the O-ring 52 seals between the bottom surfaces of the grooves 47 and 47 and the inner peripheral surfaces of the collars 48 and 48, the lubricant in the spaces 36 and 36 along with the cooling water in the width direction of the pressing roller 31. There is almost no leakage through the gap to the outside (opposite to the cavity 50 side).
For this reason, in this embodiment, the effect of reducing the force required for the relative rotation can be maintained for a long time.

When the lubricant in the spaces 36 and 36 decreases due to long-term use or the like, the pressure roller 30 is disassembled to sufficiently ensure the effect of reducing the force required for the relative rotation. Thus, the lubricant can be supplied into the spaces 36 and 36.
On the other hand, in the configuration in which the frictional force acting on the O-ring interposed between the components in the pressing roller cannot be reduced, the force to be applied to the outer peripheral surface of the pressing roller in order to relatively rotate these components (the relative rotation described above) Required force) exceeds the static frictional force between the pressing roller and the anti-slip material pressed against the pressing roller, and the pressing roller cannot be brought into rolling contact with the anti-slip material.

For this reason, even if the pallet in which a part of the anti-slip material is welded is moved to pull the anti-slip material, the anti-slip material is pulled out from the anti-slip material supply device by the frictional force with the pressing roller. There is a concern that the part welded to the pallet may be peeled off.
In order to eliminate such concerns, it is conceivable to reduce the frictional force acting on the O-ring by weakening the compressive force acting on the O-ring or omit the O-ring. The sealing function of the O-ring with respect to the coolant (water, etc.) is impaired or lost.

For this reason, cooling from the inside of the pressure roller with the coolant has not been realized.
On the other hand, in the present embodiment, cooling from the inside of the pressure roller 31 by the cooling water is achieved by making both the high sealing performance of the O-ring 52 and the significant reduction of the frictional force acting on the O-ring 52 compatible. It became feasible.

Thereby, compared with the structure which air-cools a press roller from inner side as described in patent document 1, for example, the cooling performance of the press roller 31 can be improved significantly.
For this reason, the welding strength between the anti-slip material S and the pallet P can be further improved, and the anti-slip material S can be fluffed after being pressed by the pressure roller 31 due to the reliable prevention of adhesion to the pressure roller 31. Can be avoided and high quality can be ensured.

  In particular, immediately after the pressing of the anti-slip material S by the pressing roller 31 is started, the anti-slip material S and the pallet P are quickly fixed by the high cooling effect of the cooling water of the pressing roller 31. For this reason, it is possible to start pulling out the anti-slip material S from the anti-slip material supply device (movement of the pallet P in the left direction in FIG. 2) in a short time after the start of pressing, thereby improving work efficiency. You can also.

FIG. 4 is a cross-sectional view of a form in which a guide member is disposed on the anti-slip material pressing roller device according to FIG. 3.
In FIG. 4, like the one described in Patent Document 1, a pair of anti-slip material guide plates 34, 34 opposed in the width direction of the pressing roller 31 are arranged, and the anti-slip material S fed out from the anti-slip material supply device. Are guided by the pair of anti-slip material guide plates 34 and 34.

And it is set as the structure which guides the anti-slip | skid material S to the width direction center part of the press roller 31 directly under the press roller 31, ie, the proximity of the cavity 50, and especially heat exchange with a cooling water is thriving. .
As shown in FIG. 5, the anti-slip material guide plates 34, 34 are notched at the upper portion in the assembled state of the pressure roller 30, and a recess 34 a is formed. A substantially circular through-hole 34b is opened in the portion, and portions protruding upward on both sides of the recess 34a are used as locking pieces 34d and 34d.

The locking pieces 34d and 34d are locked to the elevating rod 10 in a state where the pressure roller 30 is assembled, thereby preventing the anti-slip guide plates 34 and 34 from rotating.
On the other hand, as shown in FIG. 4, the pressing roller 31 is formed with endless and annular grooves 37 and 37 by notching the outer peripheral portions of the cavity 50 on both the left and right sides in the figure in the circumferential direction.
Furthermore, although not shown, the pressing roller 31 is configured to be divided in the left-right direction in the drawing at the positions of the grooves 37, 37, for example.

In such a configuration, the pressure roller 31 formed in a divided manner is assembled so that the peripheral edge of the through hole 34b is rotatably engaged with the grooves 37, 37, and the anti-slip material guide plates 34, 34 are pressed. Attach to roller 31.
Since the two grooves 37 and 37 are provided at symmetrical positions in the same direction with respect to the center of the cavity 50 in the horizontal direction in the figure, the anti-slip material guide plates 34 and 34 are also shown in the left and right of the cavity 50 in the figure. It is arrange | positioned in the symmetrical position of the same direction on the basis of the direction center part.

  In the state where the pressure roller 30 is assembled with the locking pieces 34 d and 34 d facing upward, the lower surfaces 34 c and 34 c of the anti-slip material guide plates 34 and 34 are positioned on the inner peripheral side of the outer peripheral surface of the pressing roller 31. As a result, the pressing roller 31 can reliably contact the anti-slip material S and press it. That is, there is no concern that the lower surfaces 34c and 34c come into contact with the anti-slip material S.

At this time, the corner portions 34e and 34e of the anti-slip material guide plates 34 and 34 projecting outward from the outer peripheral surface of the pressing roller 31 guide both end edges in the width direction of the anti-slip material S.
According to the configuration of FIG. 4, even if rolling occurs on the moving pallet P, the anti-slip material S is guided at both edges in the width direction by the pair of anti-slip material guide plates 34 and 34 to prevent meandering. Is done.

In particular, the thin anti-slip material S becomes softer by hot air blown from the hot air gun 7 and becomes easier to meander, but is guided by the pair of anti-slip material guide plates 34 and 34, so that the meandering is effective. Can be prevented.
Further, in addition to preventing the anti-slip material S from meandering, the anti-slip material guide plates 34 and 34 are disposed at symmetrical positions in the same direction with respect to the center of the cavity 50 in the horizontal direction in the figure. Then, the anti-slip material S is reliably guided toward the center in the width direction of the pressure roller 31 (part of the outer peripheral surface of the pressure roller 31 facing the cavity 50) where heat exchange with the cooling water is particularly active. Can be pressed.

Thereby, the cooling water absorbs more heat from the anti-slip material S and the pallet P via the pressing roller 31, and the cooling performance of the anti-slip material S and the pallet P can be further improved.
Further, the pressing roller 31 can reliably follow the unevenness and sink marks on the anti-slip material welding surface of the pallet P.

FIG. 6 is a view showing a modification of the coolant supply passage and the coolant discharge passage according to FIG.
In FIG. 6, the penetrating directions of the holes 42 and 43 are made to be approximately orthogonal to each other instead of being parallel to each other.
As shown by the arrows in FIG. 6, the cooling water supplied from one end of the hole 42 into the cavity 50 is moved to the other direction of the hole 42 at each position advanced by approximately 90 ° in the opposite direction of the circumferential direction of the mounting shaft 41. It collides with the cooling water supplied into the cavity 50 from the end.

Here, by making the penetrating directions of the holes 42 and 43 approximately orthogonal to each other, both ends (inlet portions) of the hole 43 face each part where the cooling water collides (water pressure tends to increase). Can do.
As a result, the hole 43 becomes an escape path for the collided cooling water, and the cooling water that has sufficiently absorbed heat from the pressing roller 31 can easily flow into the hole 43 from the inside of the cavity 50, thereby promoting circulation of the cooling water. As a result, the cooling effect of the pressing roller 31 can be enhanced.

FIG. 7 is a cross-sectional view of a modification of the central axis according to FIG.
In FIG. 7, the mounting shaft 41 is configured so that a portion between the grooves 47 and 47 in the horizontal direction in the figure is substantially the same diameter as the inner diameter of the collars 48 and 48.
Further, the mounting shaft 41 has both a position between the right side groove 47 and the outlet of the hole 42 and a position between the left side groove 47 and the inlet of the hole 43 in the horizontal direction shown in the figure. In addition, mounting holes 53, 53 that penetrate the mounting shaft 41 along the radial direction are formed.

Then, spring pins (locking members) 54, 54 are detachably fitted in the mounting holes 53, 53, respectively, and the spring pins 54, 54 cover the respective grooves 47. 48 edges are locked.
In such a configuration, the grooves 47 and 47 are covered by the collars 48 and 48 in the following procedure before the pressure roller 30 is assembled, that is, before the mounting shaft 41 is fitted into the pressing roller 31. FIG. 7 shows a symmetrical configuration, and an example in which the right side groove 48 covers the right side groove 47 will be described.

First, in a state where the spring pin 54 is not fitted into the attachment hole 53 on the right side in the figure, the collar 48 is positioned on the left side of the groove 47 with the attachment shaft 41 being fitted.
Here, the portion between the grooves 47 in the left-right direction in the figure on the mounting shaft 41 has substantially the same diameter that is smaller than the inner diameter of the collar 48, so that the collar 48 can be positioned on the left side in the figure with respect to the groove 47. It is like that.

Then, the O-ring 52 is accommodated in the groove 47 and the lubricant is injected to the left side of the O-ring 52 in the groove 47 in the drawing.
Thereafter, the collar 48 is slid to the right side in the figure, the groove 47 is covered with the collar 48, and the spring pin 54 is fitted into the mounting hole 53 on the right side in the figure. The spring pin 54 engages the left edge of the collar 48 in the figure. The collar 48 is prevented from shifting to the left side in the figure.

Here, when the collar 48 is moved to the right side in the figure, a force to the right side in the figure acts on the O-ring 52 in the groove 47 due to friction with the inner peripheral surface of the collar 48. Since it is injected to the left side of the O-ring 52 in the groove 47 in the drawing, it is prevented from being pushed out of the groove 47 by the O-ring 52.
As a result, the O-ring 52 in the groove 47 is maintained in lubrication with the bottom surface of the groove 47 and the inner peripheral surface of the collar 48 for a long time by a sufficient amount of the lubricant in the groove 47.

The mounting shaft 41 is not limited to the configuration in which the portion between the grooves 47 in the left-right direction in the drawing has substantially the same diameter, but from the position of the right-side groove 47 in the left-right direction in the drawing to the outlet side (left side in the drawing) of the hole 42. The portion whose outer diameter is smaller than the inner diameter of the collar 48 only needs to be continuous for a predetermined distance.
The predetermined distance is set to a minimum value in a range in which the collar 48 can be positioned on the left side of the groove 47 with no hindrance according to the dimension of the collar 48 in the horizontal direction in the figure.

When covering the left-side groove 47 with the left-side collar 48 in the figure, the left and right of the above description may be reversed.
Next, a second embodiment of the present invention will be described.
In this embodiment, as shown in FIG. 8, instead of the O-rings 52, 52 of the first embodiment, annular U-packings 57, 57 are used to form a mirror-like bottom surface of the grooves 47, 47, a collar 48, It seals between 48 mirror-like inner peripheral surfaces.

Here, the U packings 57 and 57 can sufficiently generate a frictional force between the bottom surfaces of the grooves 47 and 47 and the inner peripheral surfaces of the collars 48 and 48 without injecting the lubricant into the spaces 36 and 36. (The configuration in which the lubricant is injected into the spaces 36 and 36 is also included in the present invention).
Therefore, although not shown, without forming the grooves 47 and 47 for storing the lubricant, the outer peripheral surface of the mounting shaft 41 and the inner peripheral surface of the collars 48 and 48 (or the inner periphery of the pressing roller 31). It is also possible to seal with a U-packing 57, 57.

In addition, the structure which replaced only one of the two O-rings 52 and 52 of the said 1st Embodiment with the U packing 57 may be sufficient.
Next, a third embodiment of the present invention will be described.
In this embodiment, as shown in FIG. 9, the outer peripheral surface of the mounting shaft 41 is replaced by mechanical seals 60, 60 instead of the O-ring 52 of the first embodiment and the U packings 57, 57 of the second embodiment. And the inner peripheral surface of the pressing roller 31 are sealed. Note that the collars 48 are omitted.

The inner peripheral surfaces of the mechanical seals 60, 60 cover a groove 61 (dent) into which a viscous and water-insoluble lubricant such as cream grease is injected, for example, and this lubricant is a sliding portion of the mechanical seal 60. As a result, the mounting shaft 41 and the pressing roller 31 can smoothly rotate relative to each other.
Note that a configuration in which only one of the two O-rings 52 of the first embodiment (two U-packings 57 of the second embodiment) is replaced with the mechanical seal 60 may be employed.

Next, a fourth embodiment of the present invention will be described.
In the present embodiment, as shown in FIG. 10, the space between the outer peripheral surface of the mounting shaft 41 and the inner peripheral surface of the pressing roller 31 is sealed at only one place.
In FIG. 10, the pressing roller 31 is formed in a hollow shape in which only the right end portion in the left-right direction in the drawing is opened, and the hole 45 branches from the hole 43 and extends toward the right side in the drawing. The mounting shaft 41 is open to the right end face in the figure.

Then, cooling water is supplied from the open side (right side in the figure) to the cavity 50 through the holes 42 and 44, and the cooling water after cooling the pressure roller 31 is supplied to the open side (right side in the figure). It discharges through the holes 43 and 45.
Further, the O-ring 52 is confined in the space 36 and the lubricant is injected while forming the space 36 at a position on the open side (right side in the drawing) from the outlet of the hole 42 and the inlet of the hole 43 in the horizontal direction shown in the figure. ing.

As a result, the formation of the space 36 and the arrangement of the O-ring 52 are only required, and the space between the outer peripheral surface of the mounting shaft 41 and the inner peripheral surface of the pressing roller 31 can be sealed with a minimum cost. it can.
Note that the space between the outer peripheral surface of the mounting shaft 41 and the inner peripheral surface of the pressing roller 31 can be sealed by U packing or a mechanical seal instead of the O-ring 52.

The perspective view for explanation which shows an example of the synthetic resin pallet which welded the anti-slip material concerning a 1st embodiment of the present invention to the surface Explanatory drawing of the principal part of the anti-slip | skid material welding apparatus to the synthetic resin pallets which concerns on 1st Embodiment of this invention. Sectional view of the anti-slip material pressure roller device according to FIG. Sectional drawing of the form which has arrange | positioned the guide member with respect to the anti-slip | skid material pressurization roller apparatus which concerns on FIG. FIG. 4 is a perspective view of the guide member according to FIG. The figure which shows the deformation | transformation aspect of the coolant supply path and coolant discharge path which concern on FIG. Sectional drawing of the deformation | transformation aspect of the center axis | shaft which concerns on FIG. Sectional drawing of the anti-slip | skid material crimping roller apparatus which concerns on 2nd Embodiment of this invention. Sectional drawing of the anti-slip | skid material pressurization roller apparatus which concerns on 3rd Embodiment of this invention. Sectional drawing of the anti-slip | skid material pressurization roller apparatus which concerns on 4th Embodiment of this invention.

Explanation of symbols

P Pallet S Non-slip material 31 Pressing roller (roller)
33 Dimple 36 Space 34 Anti-slip material guide plate (guide member)
41 Mounting axis (center axis)
42 holes (coolant supply passage)
43 holes (coolant discharge passage)
44 holes (coolant supply passage)
45 holes (coolant discharge passage)
47 Groove 48 Color (Roller)
50 cavity 51 O-ring (second seal member)
52 O-ring (seal member)
53 Mounting hole 54 Spring pin (locking member)
57 U packing 60 Mechanical seal 61 Groove (dent)

Claims (23)

Hot air is blown onto the anti-slip material fed from the anti-slip material supply device and the welding surface of the anti-slip material on the pallet to melt them, and the roller is in contact with the anti-slip material while rolling. In the anti-slip material pressure roller device in the anti-slip material welding device for welding the anti-slip material to the welding surface of the pallet by pressing the material to the pallet,
The roller is formed in a hollow shape, and is rotatably supported by a central shaft fitted in the roller in a substantially coaxial state.
Cooling in which an outlet is opened on the outer peripheral surface of the central shaft, and the coolant for cooling the roller passes through the inside of the central shaft and between the inner peripheral surface of the roller and the outer peripheral surface of the central shaft. Forming a liquid supply passage,
An inlet is opened in the outer peripheral surface of the central shaft, and forms a coolant discharge passage for discharging the coolant after cooling the roller through the inside of the central shaft.
Of the both sides sandwiching the outlet of the coolant supply passage and the inlet of the coolant discharge passage in the width direction of the roller, on the side that becomes the inlet side of the coolant supply passage or the outlet side of the coolant discharge passage, An anti-slip material pressing roller device in an anti-slip material welding device for a pallet, wherein a seal member is provided for sealing between an inner peripheral surface of the roller and an outer peripheral surface of a central shaft. The roller is formed in a hollow shape in which both ends in the width direction are open,
The coolant supply passage is formed so as to supply coolant from one side in the width direction of the roller,
The coolant discharge passage is formed to discharge the coolant to the other side of the width direction of the roller,
The pallet slip according to claim 1, wherein the seal member is provided on both sides of the outlet of the coolant supply passage and the inlet of the coolant discharge passage in the width direction of the roller. Non-slip material pressure roller device in the welding material welding device. The roller is formed in a hollow shape opened only at one end in the width direction,
The central shaft is fitted into the roller from the open side in the width direction of the roller,
The cooling liquid supply passage is formed to supply a cooling liquid from the open side,
The coolant discharge passage is formed to discharge the coolant to the open side,
The pallet slip according to claim 1, wherein the seal member is provided on the open side from the outlet of the coolant supply passage and the inlet of the coolant discharge passage in the width direction of the roller. Non-slip material pressure roller device in the welding material welding device. At least one of the seal members is disposed in a substantially annular space formed by partitioning around the central axis by the inner peripheral surface of the roller and the outer peripheral surface of the central axis, along the entire circumference of the space. Trapped,
The lubricant is injected into the space, and the anti-slip material pressure roller device in the anti-slip material welding device for a pallet according to any one of claims 1 to 3.   The anti-slip material pressing roller device in the anti-slip material welding device for a pallet according to claim 4, wherein the seal member confined in the space is an O-ring or a U-packing.   The said space is formed by covering an endless groove formed by cutting out the outer peripheral portion of the central shaft in the circumferential direction with the inner peripheral surface of the roller. The anti-slip material pressing roller device in the anti-slip material welding device for a pallet according to claim 5. The roller includes a pressing roller that contacts and presses the anti-slip material, and a substantially annular collar disposed along the inner peripheral surface of the pressing roller in a state of being substantially coaxial with the pressing roller. Comprising and including
The anti-slip material pressing roller device in the anti-slip material welding device for a pallet according to claim 6, wherein the space is formed by covering the groove with an inner peripheral surface of the collar.   In the central axis, a portion where the outer diameter is smaller than the inner diameter of the collar continues for a predetermined distance or more from the position of the groove toward the outlet of the coolant supply passage in the width direction of the roller. An anti-slip material pressing roller device in the pallet anti-slip material welding device according to claim 7. The central axis includes
About the width direction of the roller, at a position between the groove and the outlet of the coolant supply passage or the inlet of the coolant discharge passage closer to the groove,
The pallet anti-slip material welding apparatus according to claim 8, wherein a detachable mounting hole is formed in the locking member for locking the edge of the collar in a state of covering the groove. Non-slip material pressure roller device.   The anti-slip material pressing roller device in the anti-slip material welding device for a pallet according to claim 9, wherein the locking member is a spring pin.   The pallet according to any one of claims 7 to 10, further comprising a second seal member that seals between an outer peripheral surface of the collar and an inner peripheral surface of the pressing roller. Anti-slip material pressure roller device in anti-slip material welding device.   The anti-slip material pressing roller device in the anti-slip material welding device for a pallet according to any one of claims 1 to 3, wherein at least one of the seal members is a U packing.   At least one of the inner peripheral surface of the roller and the outer peripheral surface of the central shaft has a mirror-like surface in contact with the seal member. A non-slip material pressing roller device in the anti-slip material welding device for pallets described in 1.   The anti-slip material pressing roller device in the anti-slip material welding device for a pallet according to any one of claims 1 to 3, wherein at least one of the seal members is a mechanical seal.   15. The anti-slip material welded to the pallet according to claim 14, wherein the inner peripheral surface of the mechanical seal covers a recess formed by recessing the outer peripheral surface of the central axis and injected with a lubricant. Non-slip material pressure roller device in the device.   The anti-slip material pressing roller device in the anti-slip material welding device for a pallet according to claim 15, wherein the recess is an endless groove formed by cutting out an outer peripheral portion of the central shaft in a circumferential direction. .   The said lubricant has a viscous property, The anti-slip | skid material crimping | bonding in the anti-slip | slipping material welding apparatus of the pallet of any one of Claims 4-11, Claim 15, The claim 16 characterized by the above-mentioned. Roller device.   The pallet anti-slip material welding apparatus according to any one of claims 4 to 11, and 15 to 17, wherein the lubricant has an insoluble property with respect to the coolant. Non-slip material pressure roller device. The inner peripheral surface of the roller is recessed, the cavity is covered with the outer peripheral surface of the central axis,
The pallet according to any one of claims 1 to 18, wherein at least one of the outlet of the coolant supply passage and the inlet of the coolant discharge passage faces the cavity. Non-slip material pressure roller device in the non-slip material welding device.   The anti-slip material pressing roller device in the anti-slip material welding device for a pallet according to claim 19, wherein the cavity is formed in a substantially annular shape that is substantially coaxial with the roller. Providing a guide member for guiding at least one edge of the anti-slip material in the width direction within the width of the roller;
21. The anti-slip material for a pallet according to any one of claims 1 to 20, wherein the anti-slip material is welded to the welding surface of the pallet while being guided by the guide member. Anti-slip material pressure roller device in welding equipment. The inner peripheral surface of the roller is recessed, the cavity is covered with the outer peripheral surface of the central axis,
The slip in the anti-slip material welding apparatus for a pallet according to claim 21, wherein the guide member guides the anti-slip material toward a portion of the outer peripheral surface of the roller facing the cavity. Stopping material pressure roller device.   The inlet of the cooling liquid discharge passage faces the portion where the cooling liquid advances from the outlet of the cooling liquid supply passage in a direction opposite to each other in the circumferential direction of the central axis and collides. The anti-slip material pressing roller device in the anti-slip material welding device for a pallet according to any one of claims 1 to 22.

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