JPH0414968B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cleaning machine for cleaning objects to be cleaned, such as iron plates for steak and iron plates for grilled meat, using shot material.

(Prior Art) The present inventor has developed a cleaning machine that removes dirt adhering to the surface of an object to be cleaned by shooting shot material toward the object to be cleaned, such as an iron plate for steak or grilled meat. He devised this idea and applied it in the 1980s.
It has been filed as No. 142424 (Utility Model Application No. 62-50549).

In this application, a rotary holder having an outer peripheral part made of a wire rod and holding an object to be cleaned inside the outer periphery is provided in the vertical direction, and a shot material is shot toward the axis of the rotary holder. A washing machine equipped with a shot device is disclosed.

(Problems to be Solved by the Invention) In the above cleaning machine, when the shot material is shot toward the axis of the rotary holder, the wire material on the outer periphery is close to the surface of the object to be cleaned. Since the amount of movement of the shot material relative to the object to be cleaned is small, it is difficult to shoot the shot material into the vicinity of the object to be cleaned. As a result, there is a problem in that shot unevenness occurs on the object to be cleaned.

In order to solve this problem, it is conceivable to position the objects to be cleaned inside the outer periphery at regular intervals.

However, in the above-mentioned washing machine, the object to be cleaned is held between the outer circumference and the inner circumference, so if the distance between the outer circumference and the object to be cleaned is large, the object to be cleaned cannot be stably held. . As a result, the object to be cleaned tends to move relative to the rotating holder, making it impossible for the rotating holder to reliably guide the object to be cleaned to the shot position, and making it impossible for the object to be cleaned to pass through the shot position at a constant speed. Uneven shots occur due to other reasons, such as not being able to do so.

Furthermore, even if the object to be cleaned can be positioned at a constant distance inside the wire forming the outer periphery of the rotary holder, shot unevenness still occurs for the following reason.

That is, at the shot position set by the shot direction of the shot device, the amount of shots to the part of the object to be cleaned facing the wire rod is reduced because the wire rod obstructs the shot material. Therefore, when the shot material is shot toward the axis of the rotary holder, the amount of movement of the outer periphery relative to the object to be cleaned is small, so the portion where the amount of shot decreases is fixed at a specific position on the object to be cleaned. There is a problem. As a result, shot unevenness is produced at the specific position of the object to be cleaned, which corresponds to the shape of the outer periphery.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention is provided with an outer circumferential portion made of a wire rod and a rotary holding body vertically provided inside the outer circumferential portion for holding an object to be cleaned. ,
a shot device that shoots shot materials toward the axis of the rotary holding body and whose shot direction is eccentric from the axis of the rotary holding body; and an accumulation section in which the shot materials shot by the shot device are accumulated. and a conveyor device for transporting the shot materials accumulated in the accumulation section to the shot device.

(Operations) According to the above configuration, the following operations can be performed.

The object to be cleaned is held inside the outer peripheral part of the rotary holder, and the shot material is shot toward the rotary holder using a shot device, so that the shot material is spread between the wire rods forming the outer periphery of the rotary holder. The object to be cleaned can be made to collide with the object through the object. Thereby, dirt adhering to the surface of the object to be cleaned can be removed by the impact force of the collision of the shot material.

As a result, it is possible to remove dirt that is firmly attached to the surface of the object to be cleaned (for example, carbide, oil stains, etc. attached to the surface of steak iron plates, grilled meat iron plates, etc.), which is difficult to do with conventional methods such as brush cleaning. can be done effectively. Further, the shot material shot toward the rotary holding body by the shot device is accumulated in the accumulation section and then returned to the shot device by the conveyor device, so that the shot material can be used repeatedly.

By making the shot direction of the shot material shot by the shot device eccentric from the axis of the rotary holding body, it is possible to increase the amount of movement of the outer peripheral portion relative to the object to be cleaned, so that the wire rod forming the outer peripheral portion can be It is possible to disperse the areas where the amount of shot decreases due to interference without fixing them to specific positions on the object to be cleaned.

As a result, it is possible to prevent shot unevenness corresponding to the shape of the outer periphery from occurring at a specific position of the object to be cleaned.

Furthermore, by making the shot direction of the shot material shot by the shot device eccentric from the axis of the rotary holder, the shot material can be shot onto the object to be cleaned at an angle of incidence, so that the shot material can be shot to the side. It can be caused to collide with the surface of the object to be cleaned while moving laterally from the opposite direction.

As a result, even if the shot material cannot be directly collided with the portion facing the outer periphery of the object to be cleaned, uneven cleaning of the object to be cleaned can be prevented due to the lateral movement of the shot material.

The object to be cleaned, which is held by the rotary holder provided in the vertical direction, is supported by the rotary holder from below, so the object to be cleaned is stably held by the rotary holder by its own weight, and the object to be cleaned is Objects do not move relative to the rotating holder. This results in
As the rotary holder rotates, the object to be cleaned can be reliably guided to the shot position, and
It is possible to pass the shot position at a constant speed.

As a result, it is possible to prevent variations in the amount of shots for the object to be cleaned, so that the unevenness of shots can be reduced.

(Embodiment) An embodiment in which the present invention is applied to a washing machine for shot washing iron plates for grilled meat will be described with reference to FIGS. 1 to 7.

The shot material used in this example is a mixture of aluminum shot material, urethane resin mixed with abrasive grains, and shot material made only of urethane resin in a volume ratio of 2:1:1. be.
All shot materials are spherical with a diameter of approximately 3 mm.

A cleaning tank 2 that forms a circular cleaning chamber 2a and a rectangular shot space 2b inside the exterior case 1.
has been established. In the cleaning chamber 2a, a rotating frame body (rotating holding body) 3 is rotatably provided with its axis set in a substantially vertical direction. Reference numeral 4 denotes a motor that rotationally drives the rotating frame 3. A shot device 5 for shooting shot material toward the rotary frame 3 is disposed on the rear wall of the shot space 2b. Reference numeral 6 denotes a motor that drives the shot device 5. A storage tank (accumulation section) 14 in which shot material is accumulated is provided at the lower side of the cleaning tank 2. A cup conveyor (conveyor device) 7 is disposed from the lower side to the upper side of the cleaning tank 2 to transfer the shot material accumulated in the storage tank 14 to the shot device 5. 8 is a motor that drives the cup conveyor 7.

The rotating frame body 3 is an outer frame 3 made by bending and welding a metal rod.
a and an inner frame 3b are fixed to a donut-shaped bottom plate 3c. The outer frame 3a is erected substantially vertically. The upper part of the inner frame 3b is inclined inward, and forms an entrance/exit 3b which is largely opened upwards between the inner frame 3b and the outer frame 3b. The rotating frame 3 is rotatably supported by a rotating shaft 10 passing through the center of the bottom of the cleaning tank 2 via a cross-shaped support member 9 fixed to the lower surface of the bottom plate 3a.

The rubber plate 11 is placed along the support member 9 with the rubber plate 11 facing downward. The support member 9 has an inverted L-shaped cross section, and the rubber plate 11 is removably attached to the downward side wall 9a with bolts and nuts. The rubber plate 11 presses the bottom of the cleaning chamber 2a with its lower edge,
As the rotating frame 3 rotates, the shot material on the bottom surface is swept into a discharge port 12, which will be described later. Note that a brush or the like may be used instead of the rubber plate 11.

A shot opening 5a of the shot device 5 is directed toward the rotating frame 3 from an opening formed in the back wall of the shot space 2b. The shot material is shot from the shot device 5 toward the rotating frame 3.
In this embodiment, as shown in FIG. 3, the shot direction of the shot material is slightly eccentric from the axis of the rotating frame 3 toward the rotation side, and the shot material is shot onto the grilled meat iron plate a at an angle of incidence. It is set so that This angle of incidence is preferably 5° to 50°. Thereby, the amount of movement of the outer frame 3a of the rotary frame body 3 with respect to the grilled meat iron plate a can be increased. Further, the above angle of incidence allows the shot material to collide with the surface of the grilled meat iron plate a so as to move laterally. As a result, it is possible to prevent uneven shots and uneven cleaning corresponding to the shape of the outer frame 3a from occurring at specific positions on the grilled meat iron plate a. Incidentally, since the eccentricity in the shot direction is made from the axis of the rotary frame 3 to the side that receives the rotation, together with the rotation of the rotary frame 3, the shot speed can be increased. As a result, the impact force of the shot material can be further strengthened.

The aforementioned discharge port 1 is provided at the bottom of the cleaning tank 2 from the shot device 5 to the vicinity of the rotation shaft 10 of the rotation frame 3.
2 have been established. The discharge port 12 includes a discharge chute 12a connected below the cup conveyor 7. The shot material in the cleaning tank 2 is discharged to the lower part of the cup conveyor 7 through this discharge port 12.
Accumulated. In addition, a perforated plate 13 is placed horizontally on the edge of the upper opening of the discharge port 12, and materials other than shot materials are removed from the discharge port 1.
2. Prevents it from entering inside.

The storage tank 14 in which shot materials are accumulated is provided below the cup conveyor 7. Storage tank 14
A U-shaped punching plate 15 as shown by the dotted line in FIG. 2 is attached to the. The hole diameter of the punching plate 15 is smaller than the diameter of the shot material. Further, a cleaning liquid to be described later is stored at a constant level in the storage tank 14, and the lower part of the punching plate 15 is immersed therein. In this storage tank 14, the shot material is washed off from deposits accumulated on its surface. Note that 14a is a drain pipe for discharging the cleaning liquid from the storage tank 14, and 14b is an overflow pipe.

The shot material accumulated on the punching plate 15 of the storage tank 14 is transferred to the shot device 5 above by the cup conveyor 7. A supply chute 16 is connected to the shot device 5 and supplies the shot material to the shot device 5. Also, a cleaning liquid tank 17 and a water supply pipe 1 are installed in the supply chute 16.
8, and the above-mentioned cleaning liquid and water are appropriately supplied to the shot material. The cleaning liquid and water are shot together with the shot material toward the rotating frame 3 and then collected in the storage tank 14.

A movable safety shutter 19 is provided between the shot device 5 and the rotating frame 3 in the cleaning tank 2.
One side of the safety shutter 19 is pivotally supported by the side wall of the cleaning tank 2, and the safety shutter 19 is rotatably supported between an open position that allows shot material to pass through and a closed position that blocks passage of shot material.

On the other hand, near the opening 1a of the exterior case 1, as shown in FIG.
It is provided so that it can rotate around a (S←→O direction). The rotation rod 20 opens and closes the opening 1a (U←→L
When the opening/closing lid 21 is in the closed lid position, the opening/closing lid 21 is pushed in the L direction by its own weight via its pushing portion 21a and rotated in the O direction. Also, a coil spring 22 is installed between the rotating rod 20 and the exterior case 1.
is tensioned so that when the opening/closing lid 21 is closed in the U direction, the rotation rod 20 is urged to return to rotation in the S direction.

An interlocking shaft 24 having a large-diameter sprocket 23 at its upper end is rotatably provided on the outside of the cleaning tank 2. On the other hand, a small diameter sprocket 25 is provided at the upper end of the pivot of the safety shutter 19, and a chain 26 is wound around these large and small sprockets 23, 25.
A protruding rod 24a is provided on the interlocking shaft 24, and the tip thereof and the lower end of the rotating rod 20 are connected by a connecting rod 26. Thereby, the rotation of the rotation rod 20 in the O←→S direction can be transmitted to the safety shutter 19, which can be rotated in the O direction.

The safety shutter 19 prevents the shot material from passing as shown in FIG. It is rotated (O direction) to the open position (solid line) where it is possible. Thereby, the grilled meat iron plate a can be shot cleaned. However, when the opening/closing lid 21 is not in the closed lid position due to loading/unloading of the grilled meat iron plate a or an erroneous operation, the safety shutter 19 is linked to the rotational return of the rotating rod 20 in the S direction, and the safety shutter 19 prevents the shot material from passing. It is rotated (in the S direction) to the closed position (imaginary line) that interrupts the flow. This can prevent the shot material from hitting the worker. Incidentally, it is preferable that the driving of the shot device 5 is stopped in parallel with the operation of the safety shutter 19.

Two sheets, a thick film rubber plate 27 and a thin film rubber plate 28, are attached to the entire inner wall of the cleaning tank 2. Also cleaning tank 2
In addition to the thick film rubber plate 27 and the thin film rubber plate 28, there is another reinforcing rubber plate (rubber material) 2 on the inner wall facing the shot device 5.
9 is attached.

As shown in FIGS. 6 and 7, the reinforcing rubber plate 29 is formed by covering the front and back surfaces of a punched sheet (metal core material) 30 with rubber layers 29a and 29a. The rubber layer 29a is made of synthetic rubber such as urethane rubber or silicone rubber, which is harmless in terms of food hygiene, and is made by pouring the liquid synthetic rubber into a mold in which the punching sheet 30 is placed horizontally and hardening it. The front rubber layer 29a and the back rubber layer 29a are
They are integrated through the small holes 30a of the punching sheet 30. The thick film rubber plate 27 is also formed in the same manner as the reinforcing rubber plate 29.

By attaching this reinforcing rubber plate 29 to the inner wall of the cleaning tank 2, it is possible to protect the cleaning tank 2 and the shot material from the impact force at the time of a collision and maintain their durability for a long period of time. can be made smaller to keep the noise low.

Also, since the front and back rubber layers 29a, 29a cover the punching sheet 30, the punching sheet 3
The expansion and contraction of the rubber layer 29a in the plane direction of 0 can be controlled by the punched sheet 30. As a result, even if the shot material collides with the reinforcing rubber plate 30 with a strong impact force, the front and back rubber layers 29
Since deterioration due to vibration in the plane direction of a and 29a can be prevented, it can be used for a long time.

Furthermore, as shown in FIG. 6, the reinforcing rubber plate 29 is preformed in a shape and size that can cover only the necessary parts, and is replaceably attached to the said parts via bolts and nuts. Since this reinforcing rubber plate 29 is given shape retention by the punched sheet 30, the above-mentioned attachment with bolts and nuts can be sufficiently performed at four corners. This makes it possible to efficiently reinforce the portion that receives the most impact from the shot material, and also facilitates attachment and detachment work during replacement. In addition to the punched sheet 30, a wire mesh or the like can also be used for the reinforcing rubber plate 29.

The operation of the washing machine configured as above will be explained.

The opening/closing lid 21 of the outer case 1 is opened, and the grilled meat iron plate a is inserted between the outer frame 3a and the inner frame 3b of the rotary frame body 3 through the entrance/exit 3d. This opening/closing lid 2
When the first lid is opened, the safety shutter 19 is in the closed position (first
(phantom line in the figure), there is no risk of the shot material hitting the operator even if the shot device 5 is driven by mistake. The same applies when the opening/closing lid 21 is opened by mistake during shot cleaning. The operation of holding the grilled meat iron plate a on the rotary frame 3 can be easily performed through the large opening 3d. The grilled meat iron plate a is stably held on the rotating frame 3 by its own weight.

When the opening/closing lid 1a is closed, the safety shutter 19 is rotated to the open position (solid line in FIG. 1),
Shot material can pass through.

Next, rotate the rotating frame 3 (counterclockwise in Figure 3)
to drive the shot device 5. Yakiniku iron plate a
is stably held by the rotating frame 3 due to its own weight, and the grilled meat iron plate a does not move relative to the rotating frame 3, so as the rotating frame 3 rotates, the grilled meat iron plate a is moved to the position to be shot. It is possible to reliably guide the object and make it pass through the shot position at a constant speed. As a result, it is possible to prevent unevenness in the shot amount relative to the grilled meat iron plate a due to the iron plate for grilling a being removed from the above-mentioned shot position or changes in passing speed, etc., so that uneven shots can be prevented.

Further, in this embodiment, the shot direction of the shot material shot by the shot device 5 is controlled by the rotating frame 3.
By making the outer frame 3 eccentric from the axis of the outer frame 3, the amount of movement of the outer frame 3 relative to the grilled meat iron plate a can be increased. Thereby, the portion where the outer frame 3a obstructs the passage of the shot material and reduces the amount of shot material can be dispersed without being fixed to a specific position on the grilled meat iron plate a. As a result, it is possible to prevent shot unevenness corresponding to the shape of the outer frame 3a from occurring at a specific position on the grilled meat iron plate a.

Furthermore, in this embodiment, the eccentricity in the shot direction allows the shot material to collide with the surface of the grilled meat iron plate a in a lateral movement at an incident angle (5° to 50°). As a result, even if the shot material cannot be directly collided with the portion of the grilled meat iron plate a facing the outer frame 3a, uneven cleaning can be prevented from occurring on the grilled meat iron plate a due to the lateral movement of the shot material. be able to.

Among the dirt adhering to the grilled meat iron plate a, the aluminum shot material removes strongly adhering dirt such as carbide with a strong impact force. The urethane shot material evenly removes evenly spread dirt such as oil and fat with a soft impact force. The urethane resin shot material mixed with abrasive grains has the function of removing major sticky dirt and polishing the surface of the grilled meat iron plate a.

In this way, the impact force and polishing force were different.
By mixing and shooting different kinds of shot materials, it is possible to efficiently remove the various kinds of dirt adhering to the grilled meat iron plate a. Therefore, it takes too much time to clean the grilled meat iron plate a,
Washing does not cause scratches or cracks on the grilled meat iron plate a. Note that it is preferable to set the types and mixing ratio of shot materials to be mixed depending on the object to be cleaned.

The shot material and the deposits removed from the surface of the grilled meat iron plate a by the shot material fall and accumulate on the bottom surface of the cleaning chamber 2a. Then,
A flexible plate-shaped body 11 provided in a cross shape on the lower surface of the bottom of the rotating frame 3 sweeps the shot material and the deposits into the discharge port 12. The shot material accumulated in the storage tank 14 through the discharge chute 12a is transferred to the shot device 5 by the cup conveyor 7 after the deposits deposited on its surface are washed off by the cleaning liquid in the storage tank 14.

Shot material is supplied to the shot device 5 through a supply chute 15. At this time, the shot material
Cleaning liquid and water are supplied as appropriate. These cleaning liquids and water can be used not only to clean the grilled meat iron plate a, but also to clean the shot material itself, so that the shot material can be used repeatedly.

(Effects of the Invention) Since the present invention has the above configuration and operation, it can achieve the following effects.

Dirt attached to the surface of the object to be cleaned can be removed by the impact force of the collision of the shot material.

As a result, it is now possible to remove dirt firmly attached to the surface of the object to be cleaned (for example, carbide and oil stains attached to the surface of steak iron plates, grilled meat plates, etc.), which was difficult to do with conventional methods such as brush cleaning. Can be done effectively. Further, the shot material shot toward the rotary holding body by the shot device is accumulated in the accumulation section and then returned to the shot device by the conveyor device, so that the shot material can be used repeatedly.

The area where the amount of shot decreases due to obstruction of the wire forming the outer periphery can be dispersed without fixing it to a specific position on the object to be cleaned.

As a result, it is possible to prevent shot unevenness corresponding to the shape of the outer periphery from occurring at a specific position of the object to be cleaned.

The shot material can be moved from the side and collided with the surface of the object to be cleaned.

As a result, even if the shot material cannot be directly collided with the portion facing the outer periphery of the object to be cleaned, uneven cleaning of the object to be cleaned can be prevented due to the lateral movement of the shot material.

As the rotary holder rotates, the object to be cleaned can be reliably guided to the shot position, and the object can be passed through the shot position at a constant speed.

As a result, it is possible to prevent variations in the amount of shots for the object to be cleaned, so that the unevenness of shots can be reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a longitudinal sectional front view thereof, Fig. 3 is a sectional view taken along the line - - of Fig. 2, Fig. 4 is a perspective view of the main part thereof, and Fig. 5 is 2 is a cross-sectional view taken along the line 2, FIG. 6 is a partially cutaway perspective view of the reinforcing rubber plate, and FIG. 7 is a cross-sectional view showing the state in which the reinforcing rubber plate is attached. 3...Rotating holding body, 3a...Outer peripheral portion, 5...Shot device, 7...Conveyor device, 14...Accumulating section, a...Object to be cleaned.

Claims (1)

[Claims] 1. A rotary holder having an outer periphery made of a wire rod and holding an object to be cleaned inside the outer periphery is provided in the vertical direction, and a shot material is shot toward the axial center of the rotary holder and the shot is A shot device whose direction is eccentric from the axis of the rotary holding body, a stacking section where the shot materials shot by the shot device are accumulated, and a conveyor device which transfers the shot materials accumulated in the stacking section to the shot device. A washing machine characterized by having.