WO2014027575A1 - Shot peening device - Google Patents

Description

Shot processing device

The present invention relates to a shot processing apparatus for processing a surface of an object to be processed by projecting a projection material onto the object to be processed.

Some shot blasting machines (shot processing apparatuses) project a projection material onto an object to be processed by rotating an impeller (see, for example, Patent Document 1 below). In this shot blasting machine, the impeller-containing blade chamber and the cabinet storage tank (hopper) are connected by a suction pipe, and the projection material dropped in the storage tank passes through the suction pipe to the blade chamber. Supplied.

Japanese Utility Model Publication No. 63-83268

However, in this shot blasting machine, if the suction port of the suction tube is blocked by the projection material accumulated in the storage tank of the cabinet, the projection material may not be efficiently sucked from the suction port. For this reason, in the shot blasting machine, there is room for improvement in that the projection material dropped into the storage tank is efficiently sucked.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a shot processing apparatus that can efficiently suck the projection material dropped on the hopper.

The shot processing apparatus according to claim 1, wherein a projection chamber into which an object to be processed is carried in, a hopper portion disposed below the projection chamber, a cabinet provided therein, and an upper portion of the cabinet The projection device that is provided and projects the projection material toward the object to be processed by rotating the impeller, and connects the projection device to the inside of the hopper unit, and the projection material dropped to the hopper unit A pipe that sucks in the suction port and supplies the pipe to the projection device, and has a cylindrical shape with the longitudinal direction of the pipe as an axial direction, and is attached to the lower end of the pipe with the pipe disposed inside. And a cover.

In the shot processing apparatus according to the first aspect, the projection chamber and the hopper portion are provided inside the cabinet, and the hopper portion is disposed below the projection chamber. Then, the impeller of the projection device provided at the upper part of the cabinet is rotated, so that a rotational centrifugal force is applied to the projection material, and the projection material is projected toward the object to be processed.

Further, the hopper unit and the projection device are connected by a pipe, and the projection material dropped on the hopper unit is sucked from the suction port of the pipe and supplied to the projection device.

Here, a cover is attached to the lower end of the pipe. The cover has a cylindrical shape with the longitudinal direction of the pipe as the axial direction, and the pipe is disposed inside the cover. Thereby, the projection material dropped on the lower end portion of the pipe hits the outer peripheral surface of the cover, so that the projection material is dropped to the outside of the cover. For this reason, it is possible to suppress the projection material from being collected around the hype suction port, and thus it is possible to suppress the hype suction port from being blocked by the projection material. Accordingly, a decrease in the suction efficiency of the pipe that sucks the projection material is suppressed, and the projection material dropped on the hopper can be efficiently sucked.

A shot processing apparatus according to a second aspect is the shot processing apparatus according to the first aspect, wherein the cross-sectional area of the pipe is set larger as it goes to the suction port, and the cross-sectional area of the cover is directed downward. It is set large according to.

In the shot processing apparatus according to the second aspect, since the cross-sectional area of the pipe is set to be larger toward the suction port, the cross-sectional area at the suction port of the pipe can be increased. Thereby, the suction | attraction force of a pipe can be enlarged. Moreover, the cross-sectional area of the cover is set larger as it goes to the lower side of the cover. Thereby, for example, the diameter of the cover can be set larger as it goes downward corresponding to the shape of the lower end portion of the pipe. Therefore, even if the cross-sectional area at the suction port of the pipe is increased, the distance between the pipe and the cover is ensured, and the effect of suppressing the accumulation of the projection material around the suction port can be maintained.

A shot processing apparatus according to a third aspect of the invention is the shot processing apparatus according to the first or second aspect, further comprising a connection mechanism that connects the cover to the pipe so as to be movable along a longitudinal direction of the pipe. Yes.

In the shot processing apparatus according to claim 3, since the cover is connected to the pipe so as to be movable along the longitudinal direction of the pipe by the connecting mechanism, the cover is attached to the pipe according to how the projection material accumulates in the hopper. The position can be adjusted. Therefore, the projection material dropped on the hopper can be sucked more efficiently.

The shot processing apparatus according to claim 4 is the shot processing apparatus according to any one of claims 1 to 3, wherein the pipe is provided inside the cabinet and vertically in a side view. It is arranged diagonally.

In the shot processing apparatus according to the fourth aspect, the pipe is provided inside the cabinet and is disposed obliquely with respect to the vertical direction in a side view. Thereby, compared with the case where a pipe is arrange | positioned on the outer side of a cabinet, the length of a pipe can be set short, for example.

The shot processing device according to claim 5 is the shot processing device according to claim 4, wherein the lower end portion of the pipe is disposed directly below the projection device, and the upper end portion of the pipe is directed to the projection device side. It is bent toward.

In the shot processing device according to claim 5, since the lower end portion of the pipe is disposed directly below the projection device, the projection material projected from the projection device is mainly dropped onto the lower end portion of the pipe in the hopper portion. . Thereby, the suction efficiency of the pipe which sucks the projection material can be further increased. In addition, since the upper end of the pipe is bent toward the projection device side, the length of the pipe can be set shorter than a pipe connected by only a horizontal / vertical pipe without using a bent pipe.

A shot processing apparatus according to claim 6 is the shot processing apparatus according to any one of claims 1 to 5, wherein the shot processing apparatus is provided in the cabinet and sucks air in the projection chamber into the air. In addition to separating and removing foreign matters other than the projection material included, a dust collector is provided in which a circulation path portion for supplying air from which the foreign matter has been removed to the projection chamber is formed.

In the shot processing apparatus according to claim 6, a dust collector is provided in the cabinet. And the air in a projection chamber is attracted | sucked by a dust collector, and foreign materials other than the projection material contained in the said air are isolate | separated and removed. Furthermore, air from which foreign matters have been removed is supplied to the projection chamber by a circulation path formed in the dust collector. For this reason, it is possible to filter the air in the projection chamber and supply the filtered air to the projection chamber again without introducing outside air into the projection chamber. Thereby, a shot processing apparatus can be made into a simple structure. That is, if outside air is introduced into the projection chamber, an exhaust duct or the like for discharging the filtered air to the outside of the cabinet is required. However, by adopting a configuration that does not introduce outside air into the projection chamber, Etc. need not be provided.

A shot processing apparatus according to a seventh aspect is the shot processing apparatus according to the sixth aspect, wherein a plurality of the circulation path portions are provided in a rear portion of the cabinet and are arranged side by side in the width direction of the cabinet. ing.

In the shot processing apparatus according to claim 7, a plurality of circulation path portions are provided in the rear portion of the cabinet and are arranged side by side in the width direction of the cabinet, so that protrusion of the circulation path portion from the cabinet is suppressed. Thus, the appearance of the shot processing apparatus can be improved.

The shot processing apparatus according to claim 8 is the shot processing apparatus according to any one of claims 1 to 7, wherein the shot processing apparatus is connected to the pipe and sprays an antistatic liquid onto the projection material in the pipe. An antistatic device is provided that includes a nozzle, a tank in which the antistatic liquid is stored, and a pipe that communicates the nozzle with the tank.

9. The shot processing apparatus according to claim 8, further comprising an antistatic device, wherein the antistatic device includes a nozzle connected to the pipe, a tank storing the antistatic liquid, and a pipe connecting the nozzle and the tank. And. And an antistatic liquid is supplied to a nozzle via piping, and an antistatic liquid is sprayed on the projection material in a pipe. For this reason, for example, when the projection material is made of resin, it is possible to suppress the projection material from being charged. Therefore, the projection material in the pipe can be circulated well.

The shot processing apparatus according to claim 9 is the shot processing apparatus according to claim 8, wherein the tank is disposed on a rear side of the cabinet, and an upper portion of the pipe is adjacent to a rear wall of the cabinet. It is arranged and the nozzle is connected to the upper part.

In the shot processing apparatus according to claim 9, the tank is provided on the rear side of the cabinet, and the upper part of the pipe is disposed adjacent to the rear wall of the cabinet. And the nozzle of the antistatic device is connected to the upper part of the pipe. Thereby, the length of piping in an antistatic device can be set short.

The shot processing apparatus according to claim 10 is the shot processing apparatus according to any one of claims 1 to 9, wherein the shot processing apparatus is provided in the projection chamber and rotated to agitate the object to be processed. An apron configured to include an agitating belt, an impeller driving unit that rotationally drives the impeller, and a belt driving unit that rotationally drives the agitating belt, and a control unit that drives and controls them, and An impeller driving unit, the belt driving unit, and the control unit are arranged in the upper part of the cabinet.

In the shot processing apparatus according to claim 10, an apron is provided in the projection chamber, and the apron has a stirring belt. And a to-be-processed target object is stirred by rotating a stirring belt. The shot processing apparatus includes a control unit, and the control unit is connected to an impeller driving unit that rotates the impeller and a belt driving unit that rotates the stirring belt. And the impeller drive part, the belt drive part, and the control part are arrange | positioned at the upper part of the cabinet. Thereby, for example, since the impeller drive unit and the belt drive unit are prevented from protruding from the side surface of the cabinet, the appearance of the shot processing apparatus can be further improved.

According to the shot processing apparatus of the first aspect, the projection material dropped on the hopper can be efficiently sucked.

According to the shot processing apparatus of the second aspect, it is possible to maintain the effect of suppressing the accumulation of the projection material around the suction port while increasing the suction force of the pipe.

According to the shot processing apparatus of the third aspect, the projection material dropped on the hopper can be more efficiently sucked.

According to the shot processing apparatus of the fourth aspect, the length of the pipe can be set shorter than when the pipe is arranged outside the cabinet.

According to the shot processing apparatus of the fifth aspect, the suction efficiency of the pipe can be further increased, and the length of the pipe can be set short.

According to the shot processing apparatus of the sixth aspect, the shot processing apparatus can be configured simply.

According to the shot processing device of the seventh aspect, the appearance of the shot processing device can be improved.

According to the shot processing apparatus of the eighth aspect, the projection material in the pipe can be circulated well.

According to the shot processing device of the ninth aspect, the length of the pipe in the antistatic device can be set short.

According to the shot processing apparatus of the tenth aspect, the appearance of the shot processing apparatus can be further improved.

(A) is the expanded sectional view in which the pipe cover used for the shot blasting device concerning a 1st embodiment was connected to a suction pipe, and it was partially fractured, and (B) is (A). It is the arrow line view which looked at the state shown from the arrow 1B direction of (A). It is a front view showing the whole shot blasting device concerning a 1st embodiment. It is a right view which shows the whole shot blasting apparatus shown by FIG. It is a top view which shows the whole shot blasting apparatus shown by FIG. FIG. 3 is a schematic view of an apron used in the shot blasting apparatus shown in FIG. 2 seen through from the right side of the shot blasting apparatus. FIG. 6 is a schematic view of the apron shown in FIG. 5 seen through from the front of the shot blasting apparatus. It is a side view which shows the inside of the cabinet shown by FIG. FIG. 8 is a schematic view of the suction pipe and the antistatic device shown in FIG. 7 seen through from the front side of the shot blasting device. It is the schematic which saw through the suction pipe and antistatic device which are used for the shot blasting device concerning a 1st embodiment from the back side of a shot blasting device. FIG. 10 is a schematic view of the suction pipe and the antistatic device shown in FIG. 9 seen through from the right side of the shot blasting device. It is the schematic which shows the dust collector used for the shot blasting apparatus which concerns on 2nd Embodiment.

(First embodiment)

A shot blasting apparatus 10 as a “shot processing apparatus” according to a first embodiment of the present invention will be described with reference to the drawings. Note that an arrow FR appropriately shown in the drawing indicates the front of the shot blasting apparatus 10, an arrow RH indicates the right side of the shot blasting apparatus 10, and an arrow UP indicates the upper side of the shot blasting apparatus 10.

As shown in FIGS. 2 and 3, the shot blasting device 10 includes a cabinet 12, a projection device (projection unit) 46, a dust collector 68, an antistatic device 76 (see FIG. 3), a control unit 86, It is comprised including.

The cabinet 12 has a substantially box shape, and an apron chamber 14 as a “projection chamber” and a hopper portion 16 are formed in the cabinet 12. The apron chamber 14 is opened to the front side by an opening 18 (see FIG. 2) formed in the front wall of the cabinet 12. And the opening part 18 is obstruct | occluded by the workpiece carry-in / out door 20, and the opening part 18 is opened by the work carrying-in / out door 20 being opened.

The hopper 16 is disposed below the apron chamber 14 and constitutes the lower part of the cabinet 12. Between this hopper part 16 and the apron chamber 14, the vibration type inclination sieve 22 (refer FIG. 3) is provided. And when the projection material projected by the projection apparatus 46 mentioned later falls to the hopper part 16, a projection material and a foreign material are isolate | separated by the vibration type inclination sieve 22, and only a projection material falls to the hopper part 16. It is configured as follows.

Further, as shown in FIG. 4, an accommodating portion 24 that forms the upper portion of the cabinet 12 is formed on the upper side of the apron chamber 14, and a projection device 46 and the like to be described later are provided in the accommodating portion 24. Contained.

As shown in FIGS. 5 and 6, an apron 26 is provided in the apron chamber 14 of the cabinet 12. The apron 26 includes a driving roller 28, a pair of driven rollers 30 and 32, a pair of head liners 34, and an apron belt 36 as a “stirring belt”. In FIG. 6, the apron belt 36 and the driven roller 30 are not shown in the left half of the cabinet 12, and the driven roller 32 is not shown in the right half of the cabinet 12, and the apron belt is shown for convenience of explanation. A part of 36 is not shown. Further, in FIG. 6, cross-sectional hatching is omitted.

The drive roller 28 is formed in a substantially cylindrical shape, and can be rotated on both side walls of the cabinet 12 via an apron drive shaft 38 (see FIG. 6) with the axial direction being the width direction (left-right direction) of the cabinet 12. It is pivotally supported. One end of the drive roller 28 is connected to an apron drive motor 40 (see FIG. 6) as a “belt drive unit”, and the apron drive motor 40 is disposed in the housing portion 24 of the cabinet 12. And the drive roller 28 is rotated by driving the apron drive motor 40.

The driven roller 30 is disposed on the lower side of the driving roller 28, and the driven roller 32 is disposed on the front side of the driven roller 30. The driven rollers 30 and 32 are formed in a substantially cylindrical shape and are rotatable on both side walls of the cabinet 12 via the apron driven shaft 42 (see FIG. 6) with the axial direction being the width direction of the cabinet 12. It is pivotally supported.

The headliner 34 is formed in a substantially disk shape, and is rotatably supported on the side wall of the cabinet 12. The head liner 34 is disposed between the driving roller 28 and the driven roller 32 in a side view, and the outer diameter of the head liner 34 is larger than the outer diameter of the driving roller 28 and the driven rollers 30 and 32. It is set large.

The apron belt 36 is formed in an endless shape, and the apron belt 36 is formed with a plurality of insertion holes 36A (see FIG. 6). The apron belt 36 is wound around a driving roller 28 and a pair of driven rollers 30 and 32, and the outer peripheral portion of the head liner 34 is in contact with the outer peripheral surface of the apron belt 36. As a result, the apron belt 36 has a substantially L shape opened to the opening 18 in a side view, and the head liner 34 side portion of the apron belt 36 has a substantially semicircular shape along the head liner 34. A curved portion of the apron belt 36 is a stirring portion 44.

Then, an object to be processed (work) is arranged on the stirring unit 44, and the apron belt 36 is rotated in the normal rotation direction (the direction of arrow A in FIG. 5) by driving the apron drive motor 40. The object (work) is stirred on the stirring unit 44. On the other hand, when the apron drive motor 40 is driven, the apron belt 36 is rotated in the reverse rotation direction (the direction of arrow B in FIG. 5), so that the object to be processed (workpiece) is conveyed toward the opening 18. ing.

As shown in FIG. 7, the projection device 46 is accommodated in the accommodating portion 24 of the cabinet 12. The projection device 46 is configured as a centrifugal projection device, and includes an impeller 48, a blade chamber 50 that houses the impeller 48, and a projection drive motor 52 as an “impeller drive unit” that rotates the impeller 48. It consists of Then, the projection drive motor 52 is driven and the impeller 48 is rotated, whereby a rotational centrifugal force is applied to the projection material (shot, resin sphere in the present embodiment as an example), and the projection material is projected. It is like that. Thereby, a projection material is projected on the to-be-processed object (work) arrange | positioned on the stirring part 44 of the apron 26, and the surface of the to-be-processed object (work) is processed.

The projection material projected into the apron chamber 14 by the projection device 46 passes through the insertion hole 36 </ b> A of the apron belt 36 (not shown in FIG. 7), and enters the hopper portion 16 through the vibration type inclined sieve 22. It is going to be dropped.

Further, a suction pipe 54 as a “pipe” is provided between the blade chamber 50 of the projection device 46 and the hopper 16, and the suction pipe 54 has a circular pipe shape in cross section. An upper end portion of the suction pipe 54 is coupled to the blade chamber 50 via a control gauge 56, and a lower end portion of the suction pipe 54 is disposed in the hopper portion 16 with the projection device 46 and the apron 26 (not shown in FIG. 7). ). Thereby, the inside of the blade chamber 50 and the inside of the hopper portion 16 are connected (communication) by the suction pipe 54. The projection material dropped onto the hopper 16 is sucked from the suction port 54A of the suction pipe 54 by the suction force generated by the rotation of the impeller 48, and the projection material is supplied to the projection device 46.

Further, the suction pipe 54 is disposed to be inclined rearward as it goes upward in a side view, and the upper portion of the suction pipe 54 is curved toward the blade chamber 50 side and adjacent to the rear wall of the cabinet 12. Are arranged.

Also, the inner diameter at the lower end of the suction pipe 54 is set to increase in diameter toward the suction port 54A side (lower side). Thereby, in the lower end part of the suction pipe 54, it sets so that a cross-sectional area may become large as it goes to the suction port 54A. Further, as shown in FIG. 1B, four connecting rods 55 for attaching a pipe cover 60 described later are fixed to the lower end portion of the suction pipe 54 by welding or the like. The pipe 54 projects outward in the radial direction. In addition, the connecting rod 55 is provided with a total of two sets of a pair of connecting rods 55 along the longitudinal direction of the suction pipe 54, and the pair of connecting rods 55 are separated from each other in the circumferential direction of the suction pipe 54. Has been placed.

Further, as shown in FIG. 1A, a pipe cover 60 as a “cover” is provided at the lower end of the suction pipe 54 on the radially outer side of the suction pipe 54. The pipe cover 60 is formed in a substantially elliptical cylindrical shape, and is arranged on the radially outer side of the suction pipe 54 with the longitudinal direction of the suction pipe 54 as its axial direction. The lower end of the pipe cover 60 is an opening 62, and the suction port 54 </ b> A of the suction pipe 54 is exposed from the opening 62.

Further, the inner diameter of the cross section of the side wall 64 in the pipe cover 60 is set to increase as it goes downward from the axially intermediate portion of the side wall 64. Thereby, the cross-sectional area of the pipe cover 60 is set so as to increase from the axially intermediate portion of the side wall 64 toward the lower side (opening 62 side).

And, a pair of position adjusting screws 66 as a “coupling mechanism” are screwed into the side wall 64 of the pipe cover 60. The pair of position adjusting screws 66 are arranged along the longitudinal direction of the pipe cover 60 and are arranged at equal intervals with the connecting rods 55 in the circumferential direction of the suction pipe 54 (FIG. 1B )reference). Then, the tip of the position adjusting screw 66 is brought into contact with the side surface of the suction pipe 54, whereby the tip of the connecting rod 55 is brought into contact with the inner peripheral surface of the pipe cover 60, and the pipe cover 60 is attached to the suction pipe 54. It has been. Further, the pipe cover 60 can be moved relative to the suction pipe 54 along the axial direction by separating the tip of the position adjusting screw 66 from the side surface of the suction pipe 54.

As shown in FIG. 4, the dust collector 68 is provided in the rear portion of the cabinet 12. The dust collector 68 includes a plurality (five in the present embodiment) of dust collector lofs 70 as “circulation path portions”, a dust collector fan 72 housed in the housing portion 24 of the cabinet 12, and extends upward from the dust collector fan 72. And an exhaust duct 74.

The dust collector loaf 70 is provided along the vertical direction in the rear portion of the cabinet 12 and is arranged side by side in the width direction of the cabinet 12. The upper end of the dust collector loaf 70 is coupled to the dust collector fan 72. Further, a dust collector air chamber suction port 75 (see FIG. 7) is provided in the apron chamber 14 at a position in front of the dust collector loaf 70. The air (air) in the apron chamber 14 and fine powder (foreign matter) smaller than the projection material are supplied from the dust collector air chamber suction port 75 to the lower side of the dust collector loaf 70. Further, the air and fine powder supplied to the lower side of the dust collector loaf 70 are separated into air and fine powder by the dust collector loft 70, and the filtered air passes through the dust collector loft 70, the dust collector fan 72, and the exhaust duct 74. The air is exhausted outside the cabinet 12.

7 and 8, the antistatic device 76 includes an antistatic liquid tank 78, an antistatic liquid pump 80, an antistatic liquid pipe 82 as a "pipe", and a "nozzle". The antistatic liquid nozzle 84 (see FIG. 7).

The antistatic liquid tank 78 is disposed on the rear side in the lower part of the cabinet 12, and the antistatic liquid is stored in the antistatic liquid tank 78. As the antistatic liquid, for example, water or a liquid obtained by adding a surfactant to water is used.

The antistatic liquid pipe 82 is connected to the antistatic liquid tank 78 and extends from the antistatic liquid tank 78 to the upper portion of the suction pipe 54. An antistatic liquid nozzle 84 is coupled to the upper end of the antistatic liquid pipe 82, and the antistatic liquid nozzle 84 is connected to the upper portion of the suction pipe 54.

The antistatic liquid pump 80 is provided at an intermediate portion in the longitudinal direction of the antistatic liquid pipe 82, and the antistatic liquid in the antistatic liquid tank 78 is transferred to the antistatic liquid nozzle 84 by the antistatic liquid pump 80. The antistatic liquid is sprayed from the antistatic liquid nozzle 84 onto the projection material in the suction pipe 54.

As shown in FIG. 2, the control unit 86 is provided on the upper part of the front wall of the cabinet 12. The controller 86 is electrically connected to the above-described apron drive motor 40, projection drive motor 52, dust collector fan 72, and antistatic liquid pump 80. In addition, the control unit 86 includes an operation panel 88, and an operation button 90 provided on the operation panel 88 is operated, whereby the apron drive motor 40, the projection drive motor 52, the dust collector fan 72, and the antistatic liquid. The pump 80 is configured to be driven and controlled.

Next, the operation and effect of the present embodiment will be described.

In the shot blasting apparatus 10 configured as described above, the workpiece carry-in / out door 20 is opened, and an object to be treated (work) is carried into the apron chamber 14 from the opening 18 of the cabinet 12, and the object to be treated is processed. An object (work) is placed on the stirring portion 44 of the apron 26. Then, the work loading / unloading door 20 is closed and the operation button 90 of the operation panel 88 is operated, whereby the apron drive motor 40 is driven and the apron belt 36 is rotated in the forward rotation direction. Thereby, the to-be-processed target object (work | work) arrange | positioned on the stirring part 44 of the apron 26 is stirred. Then, the projection device 46 projects the projection material toward the object to be processed (work) on the stirring unit 44, thereby processing the surface of the object to be processed.

Further, the projection material projected toward the object to be processed (work) is inserted into the insertion hole 36A of the apron belt 36 and dropped onto the hopper unit 16 through the vibration type inclined sieve 22. Then, the projection material dropped onto the hopper 16 is sucked from the suction port 54A of the suction pipe 54 and supplied to the blade chamber 50. At this time, the antistatic liquid in the antistatic liquid tank 78 is supplied to the antistatic liquid nozzle 84 by the antistatic liquid pump 80, and the antistatic liquid is supplied from the antistatic liquid nozzle 84 into the suction pipe 54. Sprayed on the projection material.

Here, a pipe cover 60 is provided at the lower end of the suction pipe 54. The pipe cover 60 is arranged coaxially with the suction pipe 54, and the suction pipe 54 is arranged inside the pipe cover 60. For this reason, the projection material that has fallen to the lower end portion of the suction pipe 54 hits the outer peripheral surface of the pipe cover 60, whereby the projection material is dropped to the outside of the pipe cover 60. Thereby, since it is suppressed that a projection material accumulates around 54 A of suction openings, it can suppress that 54 A of suction openings are obstruct | occluded with a projection material. Therefore, a reduction in the suction efficiency of the suction pipe 54 that sucks the projection material is suppressed, and the projection material dropped on the hopper 16 can be efficiently sucked.

Further, the cross-sectional area of the suction pipe 54 is set larger as it goes to the suction port 54A. Thereby, the cross-sectional area at the suction port 54A can be increased, and the suction force of the suction pipe 54 can be increased. Further, the cross-sectional area of the pipe cover 60 is set larger as it goes toward the opening 62 side of the pipe cover 60. As a result, even if the cross-sectional area of the suction pipe 54 is set to increase toward the suction port 54A, the distance between the suction port 54A and the pipe cover 60 is secured, and the projection material pool around the suction port 54A is secured. The suppression effect can be maintained. As described above, the effect of suppressing the accumulation of the projection material around the suction port 54A can be maintained while increasing the suction force of the suction pipe 54.

Furthermore, the pipe cover 60 is connected to the suction pipe 54 by a position adjusting screw 66 and is movable along the longitudinal direction of the suction pipe 54. Thereby, the position of the pipe cover 60 with respect to the suction pipe 54 can be adjusted according to how the projection material accumulates in the hopper 16. Therefore, the projection material dropped on the hopper 16 can be sucked more efficiently.

Further, the suction pipe 54 is provided inside the cabinet 12 and is disposed so as to be inclined rearward as it goes upward in a side view. Thereby, compared with the case where the suction pipe 54 is arrange | positioned on the outer side of the cabinet 12, the pipe length of the suction pipe 54 can be set short, for example.

Furthermore, the lower end portion of the suction pipe 54 is disposed directly below the projection device 46. For this reason, in the hopper 16, the projection material projected from the projection device 46 can be dropped mainly around the lower end of the suction pipe 54. Thereby, the suction efficiency of the suction pipe 54 can be further increased. Further, since the upper end portion of the suction pipe 54 is bent (curved) toward the projection device 46, the pipe length of the suction pipe 54 can be set short.

Further, five dust collector lofs 70 of the dust collector 68 are provided in the rear portion of the cabinet 12 and are arranged side by side in the width direction of the cabinet 12. For this reason, since the protrusion from the cabinet 12 of the dust collector loft 70 is suppressed, the appearance of the shot blasting apparatus 10 can be improved.

Further, when the projection material is circulated by the suction pipe 54, the antistatic liquid in the antistatic liquid tank 78 is supplied to the antistatic liquid nozzle 84 by the antistatic liquid pump 80, and the antistatic liquid is supplied. Spray is sprayed from the antistatic liquid nozzle 84 onto the projection material in the suction pipe 54. Thereby, the charging of the resin-made projection material is suppressed. For this reason, the projection material in the suction pipe 54 can be circulated satisfactorily.

Further, the upper part of the suction pipe 54 is disposed adjacent to the rear wall of the cabinet 12, and the antistatic liquid nozzle 84 of the antistatic device 76 is connected to the upper part. Thereby, the length of the antistatic liquid pipe 82 in the antistatic device 76 can be set short.

Further, a control unit 86, an apron drive motor 40, and a projection drive motor 52 are arranged on the upper portion of the cabinet 12. Thereby, for example, since the apron drive motor 40 and the projection drive motor 52 are suppressed from protruding from the side surface of the cabinet 12, the appearance of the shot blasting device 10 can be further improved.

In the first embodiment, the antistatic liquid is sprayed from the antistatic liquid nozzle 84. Instead, as shown in FIGS. 9 and 10, the antistatic liquid nozzle 84 is configured as a two-fluid nozzle, and air and the antistatic liquid are mixed and ejected from the antistatic liquid nozzle 84. May be. Thereby, since a projection material and an antistatic liquid mix well, the antistatic effect in a projection material can be made still higher. In FIG. 9, the antistatic liquid tank 78 is not shown.

(Second Embodiment)

The shot blast apparatus 100 in the second embodiment is configured in the same manner as the shot blast apparatus 10 in the first embodiment, but differs in the following points.

That is, as shown in FIG. 11, in the shot blasting apparatus 100, the exhaust duct 74 in the dust collector 68 is omitted, and the upper end portion of the dust collector loaf 70 is communicated with the fan case 102 connected to the dust collector fan 72. Yes. Thus, a circulation path (see arrow C in FIG. 11) is formed between the dust collector loaf 70 and the apron chamber 14.

Then, the air (air) in the apron chamber 14 is sucked from the dust collector air chamber suction port 75 to the dust collector loaf 70 side, and foreign matters other than the projection material contained in the air are separated and removed by the dust collector loft 70. Further, air from which foreign matter has been removed is supplied to the apron chamber 14 by the dust collector loaf 70.

Therefore, the air in the apron chamber 14 can be filtered and supplied again into the apron chamber 14 without introducing outside air into the apron chamber 14. Thereby, the shot blasting apparatus 100 can be made into a simple structure. That is, if outside air is introduced into the apron chamber 14, an exhaust duct 74 or the like for discharging the air inside the dust collector loaf 70 outside the cabinet 12 is necessary. Due to the configuration not introduced into the inside, it is not necessary to provide these exhaust ducts 74 and the like. As described above, in the second embodiment, the same operation and effect as those of the first embodiment can be achieved, and the shot blasting apparatus 100 can be configured in a simple manner.

In the first embodiment and the second embodiment, the cross-sectional area of the pipe cover 60 is set larger as it goes from the axially intermediate portion toward the opening 62. Instead of this, the cross-sectional area of the pipe cover 60 may be set larger from the upper end toward the opening 62. Even in this case, the projection material dropped on the hopper can be efficiently sucked.

Further, in the first embodiment and the second embodiment, the cross-sectional area at the lower end of the suction pipe 54 is set larger as it goes to the suction port 54A. Alternatively, the end area at the lower end of the suction pipe 54 may be set constant. Even in this case, the projection material dropped on the hopper can be efficiently sucked.

Furthermore, in the first embodiment and the second embodiment, the pipe cover 60 is connected to the suction pipe 54 so as to be movable along the longitudinal direction of the suction pipe 54 by the position adjusting screw 66. Alternatively, the pipe cover 60 may be fixed to the suction pipe 54 so as not to move. Even in this case, the projection material dropped on the hopper can be efficiently sucked.

In the first embodiment and the second embodiment, the pipe cover 60 is formed in a substantially elliptic cylinder shape, but the shape of the pipe cover 60 is not limited to this. For example, the pipe cover 60 may be formed in a cylindrical shape, or may be formed in a polygonal cylindrical shape.

Furthermore, in the first embodiment and the second embodiment, the object to be processed is agitated by the apron 26 and the projection material is projected onto the object to be processed. Instead of this, for example, the object to be processed may be arranged on a rotary table, and the projection material may be projected onto the object to be processed in a state where the rotary table is rotated.

10 Shot blasting equipment (shot processing equipment)
12 Cabinet 14 Apron room (projection room)
16 Hopper part 26 Apron 36 Apron belt (stirring belt)
40 Apron drive motor (belt drive)
46 Projection device 48 Impeller 52 Projection drive motor (impeller drive unit)
54 Suction pipe (pipe)
54A Suction port 60 Pipe cover (cover)
66 Position adjustment screw (coupling mechanism)
68 Dust collector 70 Dust collector lov (circulation path)
76 Antistatic device 78 Antistatic liquid tank (tank)
80 Antistatic liquid pump (pump)
82 Piping for antistatic liquid (piping)
84 Nozzle for antistatic liquid
86 Control unit

Claims (10)

A cabinet in which a projection chamber into which an object to be processed is carried in, and a hopper disposed below the projection chamber,
A projection device that is provided at the top of the cabinet and projects a projection material toward the object to be processed by rotating an impeller, and
A pipe that connects the inside of the hopper and the projection device, and sucks the projection material dropped on the hopper from a suction port and supplies the projection material to the projection device;
A cover attached to the lower end of the pipe in a state in which the pipe is arranged on the inside while forming a cylindrical shape with the longitudinal direction of the pipe as an axial direction,
A shot processing apparatus comprising: The shot processing apparatus according to claim 1, wherein the cross-sectional area of the pipe is set to be larger as it goes to the suction port, and the cross-sectional area of the cover is set to be larger as it goes downward. 3. The shot processing apparatus according to claim 1, further comprising a connection mechanism that connects the cover to the pipe so as to be movable along a longitudinal direction of the pipe. The shot processing apparatus according to any one of claims 1 to 3, wherein the pipe is provided inside the cabinet and is disposed obliquely with respect to a vertical direction in a side view. The shot processing apparatus according to claim 4, wherein a lower end portion of the pipe is disposed directly below the projection device, and an upper end portion of the pipe is bent toward the projection device side. A circulation path that is provided in the cabinet and sucks air in the projection chamber to separate and remove foreign matters other than the projection material contained in the air, and supplies the air from which the foreign matters have been removed to the projection chamber The shot processing device according to any one of claims 1 to 5, further comprising a dust collector in which a portion is formed. The shot processing apparatus according to claim 6, wherein a plurality of the circulation path portions are provided in a rear portion of the cabinet and arranged side by side in the width direction of the cabinet. A nozzle connected to the pipe for spraying an antistatic liquid onto the projecting material in the pipe; a tank storing the antistatic liquid; and a pipe for communicating the nozzle and the tank. The shot processing apparatus according to any one of claims 1 to 7, further comprising an antistatic device. The tank is disposed on the rear side of the cabinet, and the upper portion of the pipe is disposed adjacent to the rear wall of the cabinet;
The shot processing apparatus according to claim 8, wherein the nozzle is connected to the upper portion. An apron provided in the projection chamber and configured to include an agitation belt that agitates the object to be treated by being rotated;
A control unit that is connected to an impeller driving unit that rotationally drives the impeller and a belt driving unit that rotationally drives the agitation belt, and drives and controls them;
With
The shot processing apparatus according to any one of claims 1 to 9, wherein the impeller driving unit, the belt driving unit, and the control unit are arranged in an upper part of the cabinet.

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