JP4861137B2 - Shot blasting equipment - Google Patents

Description

  The present invention relates to a so-called apron type shot blasting apparatus, which is a shot blasting apparatus that is applied to the cleaning of parts to be polished such as small articles and thin articles.

  An endless belt that is stretched between a plurality of rollers including at least a driving roller, a tension roller, and a front roller, and rotates, and is provided so as to rotate while contacting the endless belt with a predetermined circumference. A pair of side drums that form a part to be cleaned, and agitated by the endless belt that rotates and rotates in the forward direction. Apron-type shot blasting devices that have been constructed so that the endless belt can be rotated in the reverse rotation direction and can be ejected from the front edge side of the endless belt are also known. Yes.

  For example, inside the scouring cabinet, a rotating plate disposed to face the side plate via a support shaft in a space of a frame composed of a side plate disposed on both side walls of the scouring cabinet and the side plate and a transfer plate; Three rollers are rotatably provided at a position surrounding the rotating plate, an endless belt is stretched between the rollers, and the object to be cleaned receiving portion configured by the endless belt and the two rotating plates is provided in the above-described manner. An apparatus has been proposed that rotates together with the frame to completely discharge the object to be cleaned from the object receiving part (Patent Document 1). However, this apparatus rotates the entire frame, and the apparatus becomes large.

  In order to improve the device described in Patent Document 1, the side drums are connected to each other by a connecting shaft and are provided so as to be rotatable around a drive pulley, a tension pulley is provided to be movable, and the tension pulley is moved upward. The object to be cleaned is formed by rotating, and the grounding point of the side drum and endless belt is positioned above the front pulley by rotating the tension pulley downward. An apparatus has been proposed in which the object to be cleaned is discharged from the receiving part (Patent Document 2). In this device, the end roller is moved by rotating the tension roller while the side drum and the endless belt are in contact with each other, and the position of the endless belt is moved under a considerable load. Damage is likely to occur.

  The present applicant arranges the front roller so that the contact start point between the endless belt and the side drum is located above the dropping point of the part to be cleaned that falls along with the rotation of the endless belt, An apron-type shot blasting apparatus has been proposed in which a front roller is provided so as to be movable up and down, and is configured to move the front roller downward when discharging the parts to be cleaned (Patent Document 3).

JP-A-6-769 Japanese Patent Laid-Open No. 9-29643 Japanese Patent Publication No. 4-60788

  In the apparatus described in Patent Document 3, the path length of the traveling endless belt is somewhat changed during the projection cleaning in which the front roller is in the upper position and the discharging in the lower position, and the endless belt bends. When running is meandering or sliding on a roll, running is not performed smoothly and there is a gap between the endless belt and the side drum. The cleaning parts may leak or get caught in the gap and damage the parts to be cleaned. In addition, there was a problem that the discharge was not performed smoothly.

  The present invention has been made in view of the above problems, and the path length of the traveling endless belt is made substantially equal during the projection cleaning when the front roller is in the upper position and during discharging when the front roller is in the lower position. The purpose of the present invention is to prevent the endless belt from being bent, to make the endless belt run smoothly, and to prevent meandering and no gap between the endless belt and the side drum.

That is, the present invention
(1) An endless belt that is stretched between a plurality of rollers including at least a driving roller, a tension roller, and a front roller, and rotates so as to rotate while contacting the endless belt with a predetermined circumference. A pair of side drums that form a part to be cleaned between the driving roller and the front roller on the endless belt, and the object to be cleaned put into the part to be cleaned as well as blast while stirring by an endless belt rotating traveling in the forward direction component, the endless belt is rotated traveling in the reverse direction, the blast has been HiKen Kamon article is stretched to the front roller endless A shot blasting device configured to be dischargeable from the front edge side of the belt,
(A) The front roller is provided so as to be vertically movable between an upper position and a lower position, and at the upper position, a contact start point between the endless belt and the side drum is agitated with rotation. lifting the front edge of the endless belt to a position above the than landing area, the lower position is configured to drop the leading edge of the endless belt,
(B) An auxiliary roller for placing the endless belt is provided below the side drum and on the inner surface side of the endless belt, and the auxiliary roller and the front roller are movable around the rotation axis of the auxiliary roller. Connected by arm,
(C) an auxiliary tension roller that comes into contact with the endless belt when the front roller is in the lower position ;
The auxiliary tension roller is provided between the front roller and the tension roller so as to contact the endless belt and the lower outer surface of the endless belt at a position facing the auxiliary roller. Shot blasting device, characterized by

(2) said auxiliary roller, said characterized in that it is connected to the arm for operating the vertical movement of the front SL front roller (1) shot blasting device according,

(3) The above-described (1), wherein a plurality of protruding protrusions extending in a direction crossing the traveling direction of the endless belt are provided on the endless belt on the endless part mounting portion side. The shot blasting device,

(4) The convex protrusions have a cross-sectional shape that is inclined in a slope shape on the front side with respect to the normal rotation direction of the running direction of the endless belt, and has a steep slope shape on the rear side or perpendicular to the endless belt surface The shot blasting apparatus according to (3) , wherein the shot blasting apparatus is formed as follows.

(5) The auxiliary tension roller includes a large-diameter both end portion that comes into contact with the traveling endless belt, and a small-diameter intermediate portion that does not contact the protruding protrusion provided on the endless belt. The shot blasting device according to any one of (1) to (4) ,

(6) The above-mentioned (1), characterized in that a pair of side rollers abutting in the direction intersecting the traveling direction with respect to both end edges of the endless belt is provided between the front roller and the tension roller. ) To (5) , the shot blasting device according to any one of

(7) The shot according to any one of (1) to (6) , wherein a groove is formed on an outer peripheral surface of at least one of the driving roller, the tension roller, and the front roller. Blasting equipment,
Is a summary.

  In the shot blasting apparatus of the present invention, an auxiliary tension roller is provided at a position facing the auxiliary roller between the front roller and the tension roller so as to abut the running endless belt, and the front roller is lowered. When discharging at the position, the traveling endless belt is brought into contact with the auxiliary tension roller to travel, so that the path length of the endless belt is substantially equal to that when the front roller is positioned at the upper position. Therefore, the endless belt can be prevented from being bent, and the endless belt can be smoothly driven during discharge, and the parts to be cleaned can be discharged quickly.

  In addition, by making the path lengths of the endless belt that travels substantially the same, there is no gap between the endless belt and the side drum, and when the parts to be cleaned are small articles or thin articles, the gap Therefore, there is an excellent effect that the parts to be cleaned do not leak and fall, or the parts to be cleaned are damaged by being caught in the gap.

  Furthermore, in the shot blasting apparatus of the present invention, since a groove is formed on the outer peripheral surface of at least one of the driving roller, the tension roller and the front roller, it is provided on the endless belt at the time of projection polishing. It is possible to prevent damage to the endless belt or roller surface due to the abrasive material remaining in the discharge hole falling and discharged into the groove of the roller during running and remaining on the endless belt. There are effects such as being able to.

  Further, in the shot blasting apparatus of the present invention, a plurality of protruding protrusions extending in a direction intersecting with the traveling direction of the endless belt are provided on the side of the endless belt to be polished to be cleaned, and the protruding protrusions are crossed. The front side is inclined in a slope shape with respect to the normal rotation direction of the rotating endless belt, and the rear side is formed in a steep slope shape or perpendicular to the endless belt surface. As a result, the parts to be cleaned are efficiently stirred and agitated during the projection cleaning, and uniform cleaning can be performed quickly. On the other hand, when the endless belt runs in the reverse direction, Parts can be discharged quickly.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a partially cutaway perspective view of a shot blasting apparatus of the present invention. The shot blasting apparatus includes a scouring cabinet 1, a scouring material transport unit 2, a scouring material transport pipe 3, and a scouring material projection unit 4.

  FIG. 2 is a side view of a shot blasting apparatus inside the polishing cabinet showing an example of an embodiment at the time of projection polishing in which the front roller 12 is positioned at the upper position. FIG. 3 is a side view of the shot blasting apparatus inside the polishing cabinet showing an example of an embodiment when discharging the parts to be cleaned with the front roller 12 positioned at the lower position. FIG. 4 is an enlarged view of a main part showing an example of an embodiment in which the groove 23 is provided in the front roller 12. FIG. 5 is an explanatory view (partial view) for explaining the path length of the endless belt 20.

  The shot blasting apparatus of the present invention is configured such that an endless belt 20 is stretched between a driving roller 10, a tension roller 11 and a front roller 12 and rotates, while contacting the endless belt 20 with a predetermined circumference. A pair of side drums 15, 15 are provided on the endless belt, which are provided to rotate, and form a to-be-cleaned part mounting portion 201 between the driving roller and the front roller. (Not shown), the drive roller 10 rotates forward and backward to allow the endless belt 20 to travel in the forward or reverse direction. The side drums 15 and 15 are rotatably provided on the side plate of the polishing cabinet 1. In addition, a feed roller 17 that contacts the lower side of the endless belt 20 that contacts the side drums 15 and 15 is provided.

  Below the side drum, the endless belt 20 is connected to the front roller 12 side from the lowest part of the part to be cleaned formed by the side drums 15, 15 and the driving roller 10 and the front roller 12. An endless belt is placed in contact with the front roller 12 and an auxiliary roller 13 connected by a connecting arm 120 is provided.

  The connecting arm 120 is rotatably connected to the rotation shafts of the front roller 12 and the auxiliary roller 13. The auxiliary roller 13 is connected to a drive rod 141 that is operated by a drive device (arm drive device) 140 such as an air cylinder and is pivotably operated. By operating 130, the front roller 12 is configured to move up and down via the connecting arm 120. Thereby, as shown in FIG. 2, the arm 130 is operated to move the front roller 12 to the upper position when projecting and cleaning the part to be polished, and when the front roller 12 is discharged as shown in FIG. It can be moved to the lower position.

  The driving device 140 is fixed to a fixing portion 142 provided at the bottom of the polishing cabinet 1 by a fixing tool such as a bolt and nut. The insertion hole of the fixing tool in the fixing portion 142 is a long hole, and the fixing position of the driving device 140 can be adjusted as necessary, whereby the height of the upper position and the lower position of the front roller can be adjusted appropriately. It is possible to adjust.

  Further, the tension roller 11 is provided with an adjusting means 110 for adjusting the tension of the endless belt that rotates in a constant manner, whereby the tension of the endless belt can be appropriately adjusted.

  When discharging the part to be polished with the front roller 12 moved to the lower position, the path length of the endless belt 20 changes somewhat when the front roller 12 is positioned at the upper position, and the endless belt 20 is bent. The endless belt 20 may run out of rotation, a gap may be formed between the side drums 15 and 15 and the endless belt 20, and the parts to be cleaned may be leaked. Inconvenience such as inability to occur.

  In the apparatus of the present invention, an auxiliary tension roller 14 that is in contact with the endless belt is provided between the front roller 12 and the tension roller 11 so as to face the auxiliary roller with the endless belt interposed therebetween. The path length of the belt 20 is not substantially different between the time when the front roller 12 is positioned at the upper position (projection cleaning) and the time when the front roller 12 is positioned at the lower position (when discharging). The endless belt is prevented from bending so as to always have substantially the same path length. The outline of the method of making the endless belt path lengths substantially the same will be described with reference to FIG.

  FIG. 5A shows a state where the front roller is positioned at the upper position (when the projection is cleaned). The endless belt 20 is on the side drum (not shown) side, that is, the contact surface of the auxiliary roller 13. It curves to the side of the part to be cleaned on the opposite side, and the auxiliary tension roller 14 side forms a strained path. FIG. 5 (b) shows a state when the front roller 12 is positioned at the lower position (when ejected), the front roller axis is slightly below the auxiliary roller axis, and the endless belt 20 is an auxiliary roller. 13 and the front roller 12 are almost parallel or the front roller side is below and is in tension, and is located behind the front roller provided between the front roller 12 and the tension roller 11. The endless belt 20 is brought into contact with the auxiliary tension roller 14 to form a curved path toward the auxiliary tension roller 14, and the path length of the endless belt 20 is such that the front roller 12 is located at the upper position. Time (during projection cleaning) and when the front roller 12 is in the lower position (during ejection), the path length is always substantially the same and the endless belt is bent. There has been configured to be prevented.

  Normally, the endless belt 20 does not bend when the front roller 12 is in the upper position. However, when the endless belt 20 is bent, the endless belt 20 may be bent via a driving rod operated by the driving device 140. The endless belt can be adjusted by operating the rotatable arm 130 connected to the auxiliary roller and moving the front roller 12 via the connecting arm 120 connected to the auxiliary roller 13. Further, the tension roller 11 can be adjusted by an adjusting unit 110 that adjusts the tension state of the endless belt 20.

  Further, for example, as shown in FIG. 1, a pair of side rollers 16 are provided between the tension roller 11 and the front roller 12 so as to come into contact with both edge portions of the endless belt 20 that rotates and travels. The both end edges of the belt are pressed in a direction crossing the traveling direction to restrict both end edges of the endless belt 20 that is in contact with the side roller 16 to prevent the endless belt 20 from meandering. It is preferable to make it.

  The endless belt 20 is provided with a plurality of discharge holes 21 for discharging the scouring material, and the scouring material projected at the time of projection scouring is a part to be scoured (scrubbing part) 201. The parts to be polished are cleaned and fall off from the discharge hole 21 provided in the endless belt, and most of it is discharged, but a part of the abrasive is completely removed from the discharge hole 21 provided in the endless belt 20. There is a case where it does not fall and remains in the discharge hole 21. If the abrasive remains on the endless belt 20, there is a risk of damaging the rotating endless belt 20 or the roller surface.

  In the present invention, a plurality of grooves 23 are provided on the surface of the driving roller 10 on which the endless belt 20 is stretched, the tension roller 11 or the front roller 12, generally the front roller, and the endless belt 20 is endless. The remaining polishing material caught in the discharge hole 21 of the belt 20 can be discharged and collected and dropped as the roller rotates. FIG. 4 shows an enlarged view (partial view) of a partly cut-out main part in which a concave groove 23 is provided in the front roller 12 as an example of the embodiment. The concave groove 23 may be provided so as to extend in the longitudinal direction of the roller, or may be provided in a direction crossing the longitudinal direction, that is, in the roller circumferential direction. The width and depth of the groove need only be such that they do not hinder the running of the endless belt. Usually, the width of the groove is in the range of 30 to 50 mm and the depth is in the range of 10 to 40 mm.

  Further, in the present invention, it is preferable that a protruding protrusion 22 extending in a direction intersecting with the traveling direction of the endless belt 20 is disposed on the side of the endless belt 20 to be cleaned to be cleaned 201. . The convex protrusion 22 has a cross-sectional shape that is inclined in a slope shape on the front side with respect to the normal rotation direction in which the vehicle runs and the rear side is formed in a steep slope or perpendicular to the endless belt surface. preferable. By arranging the protruding protrusion 22 on the side of the part to be cleaned 201, the part to be cleaned is lifted as the endless belt 20 travels during the projection cleaning, which facilitates stirring and uniform cleaning. Since the traveling direction of the endless belt 20 is rotated in the opposite direction to that during projection scouring, the parts to be scoured can be quickly ejected.

  In the apparatus of the present invention, the abrasive that falls through the discharge hole 21 of the endless belt 20 is collected in a collection unit disposed below the endless belt 20 that rotates and is provided in the abrasive conveyance unit 2. By the bucket 18 rotating from the lower part to the upper part, the scouring material projecting part 4 is lifted to the upper part of the scouring material transport part 2 provided in the scouring cabinet 1 and passes through the scouring material transport pipe 3. To be sent to the projection.

  As described above, the so-called apron type shot blasting apparatus of the present invention is provided with an auxiliary tension roller, so that the path of the endless belt that travels at the time of the projection cleaning where the front roller is positioned at the upper position and at the time of discharging which is positioned at the lower position. The length is substantially equal to prevent the endless belt from bending, and the endless belt caused by the bending is prevented from meandering and the endless belt from running smoothly. And can be discharged efficiently.

1 is a partially cutaway perspective view of a shot blasting apparatus of the present invention. An example of the embodiment at the time of the projection cleaning where the front roller is located at the upper position is shown. An example of the embodiment at the time of discharge | emission of the to-be-cleaned component in which the front roller was located in the lower position is shown. The principal part enlarged view which shows an example of the embodiment of the ditch | groove provided in the front roller. Explanatory drawing (partial drawing) of endless belt path length. (A) At the time of projection polishing, (b) At the time of discharging the parts to be cleaned

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Abrasive cabinet 2 Abrasive material conveyance part 3 Abrasive material transport pipe 4 Abrasive material projection part 10 Driving roller 11 Tension roller 12 Front roller 13 Auxiliary roller 14 Auxiliary tension roller 15 Side drum 16 Side roller 20 Endless belt 21 Discharge Hole 22 Convex protrusion 23 Concave groove 201 Surface to be cleaned mounted part 120 Connection arm 130 Arm 140 Drive device

Claims (7)

An endless belt that is stretched between a plurality of rollers including at least a driving roller, a tension roller, and a front roller, and that rotates, while being in contact with the endless belt with a predetermined circumferential length and rotating. On the belt, a pair of side drums that form a part to be cleaned are formed between the driving roller and the front roller, and the parts to be cleaned put in the part to be cleaned are correctly The endless belt that rotates in the rolling direction is agitated while being agitated, and the endless belt is rotated in the reverse direction, and the cleaned parts to be cleaned are placed in front of the endless belt that is stretched by the front roller. A shot blasting device configured to be discharged from the edge side,
(A) The front roller is provided so as to be vertically movable between an upper position and a lower position, and at the upper position, a contact start point between the endless belt and the side drum is agitated with rotation. The front edge of the endless belt is lifted to a position above the falling point, and the front edge of the endless belt is lowered at the lower position,
(B) An auxiliary roller for placing the endless belt is provided below the side drum and on the inner surface side of the endless belt, and the auxiliary roller and the front roller are movable around the rotation axis of the auxiliary roller. Connected by arm,
(C) an auxiliary tension roller that comes into contact with the endless belt when the front roller is in the lower position ;
The auxiliary tension roller is provided between the front roller and the tension roller so as to contact the endless belt and the lower outer surface of the endless belt at a position facing the auxiliary roller. A shot blasting device characterized by that. The shot blasting apparatus according to claim 1 , wherein the auxiliary roller is connected to an arm that operates a vertical movement of the front roller . 2. The shot blast according to claim 1, wherein a plurality of protruding protrusions extending in a direction intersecting with the traveling direction of the endless belt are provided on the endless belt on the side of the part to be cleaned. apparatus. The convex protrusion has a cross-sectional shape that is inclined in a slope shape on the front side with respect to the forward rotation direction of the endless belt, and has a steep slope shape on the rear side or perpendicular to the endless belt surface. it is shot-blasting machine according to claim 3, wherein. The auxiliary tension rollers, claim to an endless belt which travels with both ends of the large diameter abutting, characterized in that an intermediate portion of the small diameter that is not in contact with the convex projection provided on the endless belt 1 To 4. The shot blasting device according to any one of items 1 to 4 . The pair of side rollers that abut against the end portions of the endless belt in the direction intersecting with the running direction are provided between the front roller and the tension roller . The shot blasting device according to any one of the above. The shot blasting device according to any one of claims 1 to 6 , wherein a groove portion is formed on an outer peripheral surface of at least one of the driving roller, the tension roller, and the front roller .

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