JPH091267A - Can height measurement instrument - Google Patents

Abstract

PURPOSE: To quickly and surely execute height measurement of can by using a reflection laser beam sensor and fiber sensor for measurement of can height and discrimination of a kind of can. CONSTITUTION: A can 1 is fitted in a can holding face 11a on a base 10. An air cylinder 20 is mounted to a stand 13. a moving frame 24 is positioned freely in the vertical direction by the air cylinder 29. A reflection laser beam sensor 40 is mounted on the upper face of horizontal plate 24a of moving frame 24 and by emitting a laser beam wave L1, detects the distance to the reflecting point, that is a height of abutting plate 35, based on reflection wave. Three piece contacting members 36 arranged on the lower face side of abutting plate 35 are brought in contact with a can, a height of can is found. Further, a light beam L2 from the light emitting part 61a of fiber sensor 60 is received at a light receiving part 62a and a kind of can is found.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can height measuring device capable of facilitating can height measurement for detecting defective cans in the production of cans such as coffee cans.

[0002]

2. Description of the Related Art Conventionally, in the production of cans such as coffee cans, as shown in FIG. 5, the can lid 3 is attached to the can body 2 of the can 1 at the open end (the lower end of FIG. 5) of the can body 2. This is done by winding the periphery of the can lid 3 tight. The winding of the can lid 3 around the can body 2 must be performed with high precision in order to make the can 1 airtight.

Therefore, after the can lid 3 is attached to the can body 2, the winding state of the winding portion 4 is inspected to detect the can 1 that is not properly wound, and the removing work is performed. There is. In the detection of the can 1 having a poor winding tightening, the inspection is performed by measuring the height of the can 1 in addition to inspecting the winding tightening portion 4 with an X-ray measuring machine. In this inspection of the height H of the can 1, it is possible to detect the can 1 having a poor winding tightening because the height H of the can 1 having a bad winding tightening is different from the height of the normal can 1. In addition, in the inspection of the height H of the can 1, it is possible to detect a difference in the height H of the can 1 due to a cause other than the winding tightening failure such as the formation failure of the can body 2, so that it is possible to detect a wide range of defective cans. Detection can be performed.

Conventionally, the height H of the can 1 is inspected manually by using a scale capable of measuring the height of the can.

[0005]

[Problems to be Solved by the Invention] However, as such,
If the scale H is used to inspect the height H of the cans 1 manually for each can, there is a problem that the work is complicated and the work efficiency is not good.

In view of the above circumstances, it is an object of the present invention to provide a can height measuring device capable of simplifying can height measurement.

[0007]

A height measuring device for a can according to claim 1, wherein a base on which the can is installed, an abutting plate arranged to face the upper end of the can, and the abutting plate in a vertical direction. An abutting plate movement driving means for moving and abutting the upper end of the can is provided, and a height detecting means for detecting a height position of the abutting plate when the abutting plate abuts the upper end of the can. It is characterized by

According to a second aspect of the present invention, in the can height measuring device, the contact plate is pivotally attached to the contact plate moving drive means, and the contact plate is provided at the lower end of the contact plate and at the upper end of the can. It is characterized in that it is provided with three contacting members.

In the can height measuring device according to a third aspect of the present invention, a can type detecting means for transmitting light in a horizontal direction is vertically provided on the contact plate, and the height detecting means is a reflection type laser sensor. The height detecting means and the contact plate movement driving means are both provided on the moving frame, and when the light of the can type detecting means passes over the can and is transmitted to the moving frame, the moving frame moves downward. It is characterized in that a frame moving and positioning driving means for moving and positioning is provided.

[0010]

In the can height measuring device according to the first aspect, when the can is installed on the base, the contact plate moving drive means moves the contact plate facing the upper end of the can downward, The contact plate is brought into contact with the upper end of the can. Then, the height detecting means detects the height position of the contact plate. Then, the height of the can can be detected from the height position of the contact plate.

According to another aspect of the can height measuring apparatus of the present invention, the abutment plate is pivotally attached to the abutment plate movement driving means, and the lower end portion of the abutment plate is provided in three points which are in point contact with the upper end portion of the can. Since the contact member is provided, even when the upper end portion of the can is inclined, it is possible to contact the can in good balance according to the inclination. This can prevent the contact plate from tilting or shifting the can when the contact plate contacts the upper end of the can.

In the can height measuring device according to the third aspect, when the can is installed on the base, the can type detecting means hung vertically on the contact plate transmits light to the can side in the horizontal direction. Then, when this light passes over the can and is passed therethrough, since the can is a short can type, the frame moving / positioning drive means moves and positions the moving frame downward. As a result, the distance between the reflective laser sensor and the contact plate that contacts the upper end of the can is shortened, so that the measurement accuracy of the height position by the reflective laser sensor can be increased.

Further, when this light is blocked by the can and does not pass, it means that the can is a tall can type. Therefore, the distance from the abutment plate abutting on the upper end of the can is set to the moving frame. It is sufficiently short without moving down and positioning. Therefore, high measurement accuracy can be maintained.

[0014]

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing an embodiment of a can height measuring device according to the present invention.
It has 0. A can pressing member 11 having an arcuate can pressing surface 11a is mounted on the upper surface of the central portion of the base 10 with the can pressing surface 11a facing rightward, that is, rightward in FIG. On the upper right side of the base 10, a can 1 (a can 1A having a capacity of 250 cc or a can 1B or 50 having a capacity of 350 cc) is formed.
0 cc can 1C or 750 cc can 1D or 1 liter can 1
E) is placed on the base 10 with the can lid 3 down, and the winding tightening portion 4 of the can 1 is fitted to the can pressing surface 11a of the can pressing member 11.

As shown in FIG. 3, a U-shaped base spacer 12 is fixedly provided on the upper left side surface of the base 10, and the upper surface of the base spacer 12 is shown in FIG.
The stand 13 is erected as shown in FIG. As shown in FIG. 2, the stand 13 is composed of a plate member 13a facing the side of the can 1 as viewed from above, that is, the lower side of FIG. 2 and a plate member 13b joined to the plate member 13a at a right angle.

The front surface of the plate member 13b of the stand 13, that is,
An air cylinder 20 is mounted on the front side of FIG. 1, and the air cylinder 20 is a rodless type that moves and drives the slider -21 in the vertical direction. The air cylinder 20 also includes a speed controller 22 that adjusts the moving speed of the slider 21.

On the other hand, as shown in FIG. 3, a rectangular guide plate 23 is vertically extended and mounted on the plate member 13a facing the can 1 side. As shown in FIG. 2, guide grooves 23a, 23a are formed from the upper end to the lower end of the guide plate 23, respectively.
The moving frame 24 is attached to the guide plate 23 by the guide groove 23.
The movable frame 24 is connected to the slider 21 of the air cylinder 20 via a connecting member 25 by being guided by a and 23a so as to be vertically movable. Therefore, the moving frame 24 can be vertically moved and positioned by the air cylinder 20, that is, the air cylinder 20 is a frame moving / positioning driving means.

The moving frame 24 has a horizontal plate 24a, and a piston rod 31 is provided at the center of the horizontal plate 24a.
A double-acting air cylinder 30 having the above is mounted in an upright state, and the air cylinder 30 includes a speed controller 32 for adjusting the moving speed of the piston rod 31. The piston rod 31 projects below the horizontal plate 24a through a hole formed through the center of the horizontal plate 24a.

At the lower end of the piston rod 31, a disc-shaped contact plate 35 is pivotally mounted substantially horizontally via a universal joint 33. Therefore, the contact plate 35 is vertically moved by the air cylinder 30. It can be moved and driven freely. Therefore, the air cylinder 30 constitutes a contact plate movement drive means. The contact plate 35 has three semi-cylindrical contact members 36 on its lower surface side.
It has. Each of the contact members 36 has its arcuate surface 36a directed downward, and is arranged radially around the air cylinder 30, as shown in FIG.

Further, in the horizontal plate 24a of the moving frame 24, insertion holes 24b, 24b, 24b are formed so as to penetrate between the three contact members 36, 36, 36, respectively. On the upper surface of 35, the insertion holes 24 b, 24
Directly below b and 24b, as shown in FIG. 3, guide bars 37, 37 and 37 are provided upright, respectively. The guide bars 37, 37, 37 have insertion holes 24b, 24b, 24b.
It is inserted with play. A target plate 38 that reflects the laser wave L1 is attached to the upper surface of the contact plate 35.

A bracket 41 is provided on the upper surface of the horizontal plate 24a.
The reflection type laser sensor 40 is attached through the reflection type laser sensor 40, and
Is emitted and the distance to the reflection position is detected based on the reflected wave. The reflective laser sensor 40 is arranged so as to emit a laser wave L toward the target plate 38 on the upper surface of the contact plate 35 through a hole (not shown) formed through the horizontal plate 24a. There is. That is, the reflection type laser sensor 40 includes the contact plate 3
5 is a height detecting means for detecting the height position.

As shown in FIG. 3, sensor bars 51 and 51 are vertically provided at both ends of the horizontal plate 24a, and sensor blocks 52 and 52 are provided at the lower ends of the sensor bars 51 and 51, respectively. The light emitting portion 61a of the light emitting side cable 61 of the fiber sensor 60 and the light receiving side cable 6
Two light receiving parts 62a are attached. The fiber sensor 60 transmits the light L2 from the light emitting portion 61a to the light receiving portion 62a.
Is transmitted, the height of the can 1A is increased by the light L2.
It is a can type detection means for detecting that the height is lower than the light passing height position.

Air cylinders 20, 3 are mounted on the base 10.
An air supply control mechanism 70 for controlling the supply of air to 0 is installed, and the air supply control mechanism 70 is connected to the electromagnetic 5-port position switching valve 71 connected to the air cylinder 20 and the air cylinder 30. And an electromagnetic 5-port position switching valve 72. Electromagnetic 5-port position switching valve 7
1, 72 are air cylinders 20, 3 as shown in FIG.
By switching the air supply direction to 0, the air cylinder 20,
The drive direction of 30 is switched. Further, the electromagnetic 5-port position switching valve 71 detects that the height of the can 1 is lower than the light passing height position of the light L2 by the fiber sensor 60.
Is detected, the slider 21 of the air cylinder 20 is controlled to move and position to the lower end position of the movable range.

When the air pressure supplied to the air source 75 side of the electromagnetic 5-port position switching valves 71 and 72 of the air supply control mechanism 70 is not the desired pressure (when the air pressure is too high, etc.), a measurement start (not shown) is started. A pressure switch 76 for switching off is provided, and the pressure switch 76 and the air source 75 are provided.
A filter 77 for purifying the air and a pressure reducing valve 78 for adjusting the pressure of the air are provided between and.

The air supply control mechanism 70 and the reflection type laser sensor 40 are controlled by a control mechanism (not shown) as described later. The above-mentioned measurement start switch is provided in this control mechanism, and the control mechanism is connected with an output means (not shown) such as a display or an alarm device for notifying whether the height of the can is good or bad.

Since the can height measuring device 100 has the above-mentioned structure, the can height can be measured as follows.

First, a can 1 having a capacity of 500 cc shown in FIG.
The case of measuring the height of C, 750 cc cans 1D, 1l cans 1E, that is, tall can types will be described.

In a state before the measurement start switch (not shown) of the can height measuring device 100 is turned on, the stand 13 is
The slider 21 of the air cylinder 20 provided in the above is located at the upper end of its movable range, and therefore the moving frame 24 connected to the slider 21 is also located above the guide plate 23. Further, the piston rod 31 of the air cylinder 30 provided on the moving frame 24 is also located at the upper end of its movable range, and therefore the piston rod 3
The abutment plate 35 pivotally attached to 1 is also pulled up. Further, the light emitting portion 6 of the light emitting side cable 61 of the fiber sensor 60 shown in FIG.
1a and the light receiving part 62a of the light receiving side cable 62 are also in the position pulled up.

Now, as shown in FIG. 1, cans 1C or 1D.
Alternatively, 1E is placed on the base 10 with the can lid 3 down. At this time, by fitting the winding tightening portion 4 to the can pressing surface 11a of the can pressing member 11 provided on the base 10, the position of the can 1C or 1D or 1E can be accurately set just below the contact plate 35. Can be positioned.

Therefore, the measurement start switch (not shown) is turned on.
Set to N. Then, first, the fiber sensor 60 shown in FIG. 3 is driven, and the light emitting portion 61a of the fiber sensor 60 emits light toward the light receiving portion 62a. However, as shown in FIG. 1, the light emits light from the cans 1C or 1 of tall can types.
In the case of D or 1E, the light is blocked at the upper portion thereof, and therefore does not reach the light receiving portion 62a. Then, the air cylinder 20 is not driven and the moving frame 24 remains at that position.

Next, the piston rod 31 of the air cylinder 30 provided on the moving frame 24 is driven downward. This moving speed is appropriately adjusted by the speed controller 32. Then, the piston rod 31
The contact plate 35 pivotally attached to the lower end of the can moves downward, and the three contact members 36 provided on the lower surface side thereof respectively
It contacts the peripheral edge of the upper end of C, 1D or 1E. Then
The air pressure rises in the air cylinder 30, and the drive of the air cylinder 30 is stopped based on this rise in air pressure. At this time, the three contact members 36 are formed in a semi-cylindrical shape, and their arcuate surfaces 36a face downward,
Since it comes into point contact with the peripheral edge of the upper end portion of the can 1C, 1D or 1E, and the contact plate 35 is pivotally attached to the lower end of the piston rod 31 by the universal joint 33,
Even when the upper end of the can 1C, 1D, or 1E is inclined, it is possible to make a well-balanced contact according to the inclination. Therefore, it is possible to prevent the contact plate 35 from tilting or shifting the can 1C, 1D, or 1E. Then, it is possible to avoid interruption of measurement or erroneous measurement, and the measurement operation can be smoothly performed without delay.

When the driving of the air cylinder 30 is stopped,
Next, the reflection type laser sensor 40 is driven, and the reflection type laser sensor 40 emits the laser wave L1 toward the target plate 38 on the upper surface of the contact plate 35, and makes contact based on the reflection wave from the target plate 38. The distance to the plate 35 is measured. This distance data is output to a control mechanism (not shown). The control mechanism uses the distance data and the can types 1A, 1B, 1C, 1D, 1E stored in advance.
It is judged whether the height of 1C, 1D or 1E of the can is the proper height based on the data of the proper height of, and whether the quality is displayed on a display not shown or not shown. The operator is notified by sounding the alarm. Finally, the air cylinder 30 is driven,
The contact plate 31 is moved upward and returns to its original position. This completes the preparation for the next measurement of the can 1.

Therefore, cans 1C and 750 having a capacity of 500 cc
The height inspection of cc cans 1D and 1l cans 1E, that is, tall can types can be performed as described above.

Next, cans 1A and 350c having a capacity of 250 cc
A case of measuring the height of the can 1B of c, that is, the height of a can of a short height will be described.

In the case of the can 1A or 1B of this short can type, the can 1A or 1B is accurately positioned just below the contact plate 35 and installed on the base 10 in the same manner as described above, and a measurement not shown is made. Turn on the start switch. Then, first,
The fiber sensor 60 shown in is driven, and the light emitting portion 61a of the fiber sensor 60 emits light toward the light receiving portion 62a. In the case of a can 1A or 1B of a short can type, as shown in FIG.
The light is received by the light receiving unit 62a shown in FIG. Then, a signal is sent from the fiber sensor 60 to a control mechanism (not shown), and the control mechanism issues a drive command to the air supply control mechanism 70 so as to move and position the air cylinder 20 downward. As a result, the slider 21 of the air cylinder 20 is moved and positioned downward.

When the slider 21 is moved downward and positioned, the moving frame 24 connected to the slider 21 is moved.
Is also moved and positioned downward along the guide plate 23.
Then, the reflective laser sensor 40 provided on the moving frame 24 is moved and positioned downward, so that the distance between the reflective laser sensor 40 and the upper end of the can 1A or 1B can be shortened. Therefore, similarly to the above, the piston rod 31 of the air cylinder 30 is driven downward,
After the contact member 36 of the contact plate 35 comes into contact with the upper end peripheral edge of the can 1A or 1B and the piston rod 31 stops, when the distance to the contact plate 35 is measured by the reflective laser sensor 40, By shortening the distance, it is possible to maintain the same measurement accuracy as in the case of tall can types 1C, 1D, and 1E. Therefore, can 1 of the short can type
Even with A and 1B, can height inspection can be performed with high accuracy.

At this time, since the air cylinder 30 is also provided on the moving frame 24, the air cylinder 30 is moved downward, and the air cylinder 30 is moved downward.
5 also moves downward. Thereby, the contact plate 35 and the can 1A
Alternatively, since the distance to 1B is also shortened, the stroke of the air cylinder 30 can be shortened. Therefore, the air cylinder 30 is miniaturized, and by extension, the can height measuring device 100.
Can be reduced in size.

The operations thereafter are the cans 1C and 1 of tall can types.
This is the same as in the height measurement of D and 1E. However, finally, the air cylinder 30 is driven after notifying the operator by displaying the quality of the height of the can 1A or 1B on a display (not shown) or sounding an alarm device (not shown). Then, the contact plate 31 is moved upward, and the air cylinder 20 is also driven to return the moving frame 24 to the original position. Then, the preparation for the next measurement of the can 1 is completed.

Therefore, the cans 1A, 350 having a capacity of 250 cc
The height inspection of the cc can 1B, that is, the height of the short can can be performed as described above.

Therefore, the can height measuring device 1 of the above embodiment
According to 00, by simply installing the can 1 on the base 10, it is possible to perform a highly accurate can height inspection regardless of the can type. The inspection can be performed easily and speedily as compared with the case where the inspection is performed manually by a scale or the like. That is, the work of can height inspection can be simplified.

Incidentally, the can height measuring device 100 of the above embodiment.
By providing rotary positioning means such as rollers 91 for rotationally positioning the can 1 at a plurality of positions on the base 10 of the can, and measuring the height of the can 1 when the can 1 is rotationally positioned, the can can be The height can be measured more precisely. Further, by providing the roller 91 so that it can be moved and positioned in the horizontal direction, the cans 1 having different can diameters can be
That is, the height of the cans 1 having different can types can be measured.

The base 1 of the can height measuring device 100
0, a well-known X for non-destructive inspection of the winding portion 4 of the can 1
By providing the line measuring device 92, the height of the can 1 can be inspected at the same time as the inspection of the winding portion 4 by the X-ray measurement, so that the inspection work of the can 1 can be speeded up.

In the above embodiment, the frame movement positioning drive means and the contact plate movement drive means are provided in the air cylinder 2.
Although 0 and 30 have been described, it goes without saying that other moving drive means such as a hydraulic cylinder may be used.

[0044]

According to the can height measuring device of the first aspect, the height of the can can be detected simply by installing the can on the base. Compared with the case where the inspection is performed manually for each can, the height of the can can be easily and quickly inspected, and the operation can be simplified.

According to the can height measuring device of the second aspect, in addition to the above effects, when the contact plate comes into contact with the upper end of the can, the contact plate tilts or shifts the can. Since this can be prevented, the height of the can can be measured smoothly.

According to the can height measuring device of claim 3, in addition to the effect of claim 1, whether the can is a short can type or a tall can type, It is possible to maintain high measurement accuracy of the height position by the reflection type laser sensor. Therefore, the accuracy of the can height inspection can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a can height measuring device of the present invention.

FIG. 2 is a plan view showing an embodiment of a can height measuring device of the present invention.

FIG. 3 is a side view showing an embodiment of a can height measuring device of the present invention.

4 is a diagram showing a pneumatic power circuit of the can height measuring device of FIG. 1. FIG.

FIG. 5 is a cross-sectional view showing attachment of a can body and a can lid of a can.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Can 10 ... Base 20 ... Air cylinder (frame movement positioning drive means) 24 ... Moving frame 30 ... Air cylinder (contact plate movement drive means) 35 ... Contact plate 36 ... Contact member 40 ... Reflective laser sensor (high Detection means) 60 ... Fiber sensor (can type detection means) L1 ... light

Claims (3)

[Claims] 1. A base on which a can is installed, an abutting plate arranged to face an upper end of the can, and an abutting plate for moving the abutting plate in a vertical direction to abut the upper end of the can. A can height measuring device comprising: a movement driving means; and a height detecting means for detecting a height position of the contact plate when the contact plate contacts the upper end of the can. . 2. The contact plate is pivotally attached to the contact plate movement drive means, and the contact plate has three lower end portions that are in point contact with the upper end portion of the can. 1. The method according to claim 1, further comprising:
The described can height measuring device. 3. The abutment plate is vertically provided with a can type detection means for transmitting light in a horizontal direction, the height detection means is a reflection type laser sensor, and the height detection means and the contact means are provided. The contact plate moving drive means is provided together with the moving frame, and when the light of the can type detecting means passes through the upper side of the can and is transmitted to the moving frame, the moving frame is moved and positioned downward. The can height measuring device according to claim 1, further comprising a frame movement positioning drive means.