JP2007136628A - Attachment for sand blast device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attachment for a sand blast device at low cost, which is mounted with a mask on the device without changes in the structure of the sand blast device, thereby diffusing a jet of abrasive to avoid collisions with a circulating current of abrasive, and forming a wide marking without difference in the density throughout the marking. <P>SOLUTION: This attachment 1 for the sand blast device includes a support member removably mounted at the tip of a casing 13, a mask 14 supported thereon, and a jet pipe 3. The mask 14 is supported by the support member 2 in the outer peripheral part, and disposed to close the opened tip part of the casing 13. The jet pipe 3 is supported at one end side by the support member 2, and the other end thereof is extended concentrically with a nozzle 12 to the half or more of the length of the casing in the casing 13. A jet space 4 for guiding abrasive to the mask 14 is formed inside the jet pipe 3, and a circulating current space B for guiding the abrasive after collision to a discharge part 13c is formed outside it. The support member 2 is provided with a communicating part 54 for communicating the jet space A with the circulating current space B. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides a sandblasting device for marking a mark or the like on a surface of a workpiece such as glass, in which a mask having a cutout for marking and a jet tube for guiding a jet of abrasive material are detachably mounted. Regarding attachments.

Conventionally, as a sand blasting device for marking marks, etc. on the surface of a workpiece such as a glass plate, a casing for guiding the jet of abrasive is attached to the tip of a nozzle that ejects the abrasive together with compressed air. A structure in which a mask having a cutout for engraving is attached to the open end of the housing is used.
In the conventional sandblasting device, in order to make the engraving area as wide as possible, a predetermined interval is set between the mask and the nozzle, and the jet of abrasive is adjusted to have a predetermined spread at the mask portion. Is done. If this interval is too small, the abrasive concentrates at the center of the mask, and a uniform marking over a wide range cannot be obtained. If the interval is too large, it takes a long time for the marking. Therefore, an optimum interval is selected. In this case, the jet of the abrasive that has been jetted and the circulating fluid of the abrasive that has collided with the workpiece or the mask collide with each other at a peripheral portion away from the center of the casing. Therefore, there is a problem in that the collision density of the abrasive with the workpiece differs between the central portion and the peripheral portion of the mask, resulting in a difference in the finish of the marking. For this reason, conventionally, an apparatus having a complicated connection structure for swinging the nozzle with respect to the housing is used, and an additional work for swinging the nozzle is performed to make the finish of the marking uniform. ing.
In addition, in order to separate the abrasive jet and the reflux, the sand cylinder is fixed inside the outer cylinder of the sandblasting device, the jet is passed through the sand cylinder, and the reflux is passed through the suction path between the outer cylinder and the sand cylinder. A sandblasting gun as described above is described in Patent Document 1.
JP 2000-117638 A

  The present invention does not require an additional operation such as swinging the nozzle, and without changing the structure of the sandblasting device itself, it is possible to polish the inside of the housing only by mounting it with a mask on the conventional housing. Providing an attachment that can produce an appropriate marking on the finish depending on the site, by providing appropriate diffusion to the jet of material and avoiding collision with the abrasive flow after colliding with the workpiece or mask. The task is to do.

In order to solve the above-mentioned problems, the present invention comprises a support member 2 that is detachably attached to the tip of the housing 13, a mask 14 supported by the support member 2, and a jet pipe 3, and is sandblasted. An attachment 1 for the apparatus is configured. The mask 14 has a cutout portion shaped to be engraved on the workpiece W, is supported by the support member 2 at the outer peripheral portion, and is arranged so as to close the open end portion of the housing 13. The jet pipe 3 is supported by the support member 2 at the outer peripheral portion on one end side, and the other end side extends concentrically with the nozzle 12 in the housing 13 to a length of ½ or more of its length. A jet space A for guiding the abrasive from the nozzle 12 to the mask 14 is formed inside the jet pipe 3, and a reflux space B for guiding the abrasive after collision to the discharge portion 13c outside the jet pipe 3. Form. The support member 2 is provided with communication portions 54 and 65 that allow the jet space A and the reflux space B to communicate with each other.
If necessary, a spiral blade 31 for forming a spiral flow of the abrasive in the jet tube 3 is provided inside the end of the jet tube 3.

In the present invention, no additional work is required to swing the nozzle 12, and only the attachment 1 is attached to the conventional housing 13 of the sandblasting apparatus, without changing the structure of the housing 13 itself. The jet tube 3 causes appropriate diffusion of the abrasive jet in the housing 13 and avoids collision between the abrasive jet and the abrasive flow after colliding with the workpiece or the mask. The finish of the stamp can be made uniform at the periphery. The worn jet tube 3 can be easily replaced in the same manner as the mask replacement, and the initial cost and the maintenance cost are both low.
If the jet pipe 3 is provided with blades 31 and a spiral flow of abrasive is formed in the jet pipe 3, the abrasive can be collided more uniformly over a wide area of the mask 14 and the uniformity of the finish of the stamp is promoted. can do.

  Embodiments of the present invention will be described with reference to the drawings. 1 is a cross-sectional view of the attachment of the present invention attached to a housing, FIG. 2 is a front view of the attachment of the present invention, FIG. 3 is an exploded perspective view of the attachment of the present invention, and FIG. 4 is another view of the attachment of the present invention. It is sectional drawing of embodiment.

  1 to 4, reference numeral 11 denotes a sandblasting apparatus, which includes a nozzle 12 for injecting abrasive particles together with compressed air, and a casing 13 for guiding the abrasive jet jetted from the nozzle to a workpiece W such as a glass plate. It has. The nozzle 12 is fixed to the closed base end wall 13a of the housing 13, and a mask 14 having a stamped cutout is disposed in front of the opening 13b at the other end. The housing 13 has a discharge port 13c for discharging the abrasive after colliding with the workpiece W or the mask 14 together with air.

The attachment 1 includes a support member 2 that is detachably attached to the distal end portion of the housing 13, and a mask 14 and a jet tube 3 that are supported by the support member 2.
The mask 14 has a cutout portion shaped to be engraved on the workpiece W, is supported by the support member 2 at the outer peripheral portion, and is arranged so as to close the open end portion 13 b of the housing 13.

  The jet pipe 3 is supported by the housing 13 via the support member 2 at the outer peripheral portion on one end side, and extends inside the housing 13 coaxially with the nozzle 12. The jet tube 3 has a length of ½ or more of the length of the housing 13. In the illustrated embodiment, the jet tube 3 extends from the tip of the housing 13 to the vicinity of the tip of the nozzle 12. Inside the jet pipe 3, a jet space A for guiding the abrasive material ejected from the nozzle 12 to the mask 14 is formed, and on the outside of the jet pipe 11, the ejected abrasive material is guided to the discharge port 13c together with air. A circulating space B is formed. A spiral blade 31 is fixed inside the jet pipe 3 on the other end side, whereby a spiral abrasive jet is formed in the jet space A.

  The support member 2 includes a mask support member 4 that supports the mask 14 in front of the front end of the housing 13 and a jet tube support member 5 that supports the jet tube 3 in the housing 13. The jet tube support member 5 includes a tubular portion 51 and an outer flange 52 that spreads on the outer periphery of the intermediate portion of the tubular portion 51. The cylindrical portion 51 is fitted to one end side of the jet tube 3 on one end side, and the other end side reaches the vicinity of the mask 14. The outer flange 52 is coupled to the mask support member 4 by a bolt 53 at the periphery. The outer flange 52 includes a communication portion 54 that allows the jet space A and the circulation space B to communicate with each other.

  The mask support member 4 includes a support member main body 6 coupled to the distal end portion of the housing 13, a bayonet mount 7 coupled to the distal end portion of the support member main body 6, and a bayonet mount 7 that is twisted and detachable. A bayonet ring 8 and an elastic support member 9 detachably coupled to the bayonet ring 8 are provided.

  The support member main body 6 includes a cylindrical enlarged tube portion 61 concentrically arranged with the nozzle 12, an inner flange 62 at the base end of the enlarged tube portion 61, and an axial direction from the inner end of the inner flange 62. And a fitting portion 63 that extends. The inner flange 62 is coupled to the outer flange 52 of the jet tube support member 5 with bolts 53. The fitting portion 63 is detachably fitted to the outer periphery of the front end portion of the housing 13 and is fixed by a bolt 64.

  The elastic support member 9 is annular, and holds the outer peripheral portion of the mask 14 in cooperation with the annular cap 10. The bayonet ring 8 can be fitted together with the elastic support member 9 and has a plurality of engaging claws 81 on the outer peripheral side. The elastic support member 9 has an engagement protrusion 91 that elastically engages with the engagement claw 81.

  The bayonet mount 7 is fixed with a bolt 73 on the cylindrical portion 61 of the support member main body. The bayonet mount 7 includes an engagement groove 71 and a notch 72 connected thereto. The engagement groove 71 is formed on the inner peripheral side of the bayonet mount 7 so as to extend in the circumferential direction, and the engagement claw 81 of the bayonet ring 8 rotates and engages with the engagement groove 71. The notch 72 is provided on the start end side of the engagement groove 71 and can receive the engagement claw 81 in the axial direction. When the bayonet ring 8 is twisted in the engagement direction, the engagement protrusion 91 of the elastic support member 9 is bent and elastically engages with the end portion of the engagement groove 71 to prevent loosening.

  In another embodiment of the attachment of the present invention shown in FIG. 4, a communication portion 65 that communicates the jet space A and the reflux space B is provided on the inner flange 62 of the support member body 6. Other configurations are the same as those of the previous embodiment.

  The jet of abrasive material jetted together with the compressed air from the nozzle 12 is turned into a swirl flow by the spiral blade 31 and proceeds while diffusing in the jet pipe 3 toward the mask 14. Form on the surface. Since the abrasive jet spreads uniformly at the portion of the mask 14, a uniform marking is formed on the entire surface of the workpiece W within a predetermined time.

  The abrasive that has collided with the mask 14 or the workpiece W passes through the communication path 54 together with air, and is discharged to the outside through the circulation space B and the discharge port 13C. During this time, the abrasive flow is separated by the jet tube 3 and does not collide with the jet. Therefore, the distribution and speed of the abrasive material are made uniform in the jet tube 3, and the workpiece W has a uniform depth within a predetermined time. An inscription can be formed.

  The present invention can be applied to, for example, a sandblasting apparatus for marking a trademark, an identification symbol, or the like on an automobile window glass.

It is sectional drawing of the state which mounted | wore the housing with the attachment of this invention. It is a front view of the attachment of the present invention. It is a disassembled perspective view of the attachment of this invention. It is sectional drawing of other embodiment of the attachment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Attachment 2 Support member 3 Jet pipe 31 Spiral blade 4 Mask support member 5 Jet pipe support member 51 Cylindrical part 52 Outer flange 53 Bolt 54 Communication part 6 Support member main body 61 Enlarged cylinder part 62 Inner flange 63 Fitting part 64 Bolt 65 Communication part 7 Bayonet mount 71 Engaging groove 72 Notch 73 Bolt 8 Bayonet ring 81 Engaging claw 9 Elastic support member 91 Engaging protrusion
DESCRIPTION OF SYMBOLS 10 Cap 11 Sandblasting device 12 Nozzle 13 Case 13a Base end wall 13b Opening part 13c Discharge part 14 Mask
A Jet space
B reflux space
W Work

Claims (5)

A nozzle for injecting abrasive, a housing for guiding the abrasive injected from the nozzle to the workpiece to be engraved and discharging the abrasive after collision to the outside, an open end of the housing and the workpiece In a sandblasting apparatus having a mask disposed between and an attachment that is detachably attached to the tip of the housing,
A support member detachably attached to the tip of the housing, a mask and a jet pipe supported by the support member;
The mask has a cutout portion shaped to be engraved on the workpiece, is supported by the support member at the outer peripheral portion, and is arranged so as to close the open front end portion of the housing,
The jet pipe is supported by the support member at an outer peripheral portion on one end side, and the other end side is concentrically with the nozzle so as to extend the housing to a length of ½ or more of the length of the housing. A jet space that guides the abrasive material coming out of the nozzle to the mask is formed inside the jet tube, and a recirculation space that guides the abrasive material after collision to the discharge portion is formed outside the jet tube. Arranged as
The said support member has a communication part which connects the said jet flow space and the said circulation space, The attachment for sandblast apparatuses characterized by the above-mentioned. The support member includes a mask support member that supports the mask in front of the front end of the housing and a jet tube support member that supports the jet tube in the housing.
The jet tube support member includes a cylindrical portion that is fitted to one end side of the jet tube on one end side and the other end side is near the mask, and an outer portion that extends around the outer periphery of the cylindrical portion and is coupled to the mask support member. A flange,
The sandblasting device attachment according to claim 1, wherein the outer flange includes a communication portion that communicates the jet space and the reflux space. The support member includes a mask support member that supports the mask in front of the front end of the housing and a jet tube support member that supports the jet tube in the housing.
The jet tube support member includes a cylindrical portion that is fitted to one end side of the jet tube on one end side and the other end side is near the mask, and an outer portion that extends around the outer periphery of the cylindrical portion and is coupled to the mask support member. A flange,
The mask support member includes a support member main body coupled to the distal end portion of the housing, a bayonet mount coupled to the distal end portion of the support member main body, a bayonet ring that is detachable by being twisted around the bayonet mount, An annular elastic support member that is removably coupled to the bayonet ring and holds the outer periphery of the mask;
The support member body includes a cylindrical enlarged cylindrical portion disposed concentrically with the nozzle, an inner flange at the proximal end of the enlarged cylindrical portion, and an axial direction extending from an inner end of the inner flange. A fitting portion that is detachably fitted to the outer periphery of the tip of the body,
An outer flange of the jet pipe support member is coupled to an inner flange of the support member main body, and a communication portion is formed between the outer flange and the inner flange portion to communicate the jet space and the reflux space. The attachment for a sandblasting apparatus according to claim 1. The support member includes a mask support member that supports the mask in front of the front end of the housing and a jet tube support member that supports the jet tube in the housing.
The jet tube support member includes a cylindrical portion that is fitted to one end side of the jet tube on one end side and the other end side is near the mask, and an outer portion that extends around the outer periphery of the cylindrical portion and is coupled to the mask support member. A flange,
The mask support member includes a support member main body coupled to the distal end portion of the housing, a bayonet mount coupled to the distal end portion of the support member main body, a bayonet ring that is detachable by being twisted around the bayonet mount, An annular elastic support member that is removably coupled to the bayonet ring and holds the outer periphery of the mask;
The support member body includes a cylindrical enlarged cylindrical portion disposed concentrically with the nozzle, an inner flange at the proximal end of the enlarged cylindrical portion, and an axial direction extending from an inner end of the inner flange. A fitting portion that is detachably fitted to the outer periphery of the tip of the body,
The outer flange of the jet pipe support member is coupled to the inner flange of the support member main body, and the outer flange has a communication portion that communicates the jet space and the reflux space. Attachment for sandblasting device as described in 1.   The sandblast device attachment according to any one of claims 1 to 4, wherein blades for forming a spiral flow of an abrasive in the jet pipe are provided inside the other end of the jet pipe. .

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