JPS581996B2 - Toritsukemenno Jidouseijiyousouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to cleaning parts having a mounting surface, and more particularly to an apparatus for automatically cleaning oil and dirt attached or accumulated on the mounting surface.

When assembling mechanical parts in precise positions or performing setup, it is necessary to remove oil and dirt that adheres to or accumulates on the mounting surface. Up until now, this has been done by sweeping with a cloth (paper) rag or by using the palm of the hand. However, the work of removing oil and dirt from the flat mounting surface is extremely common in assembly plants and is therefore a frequently performed task. There is one.

Furthermore, it can be used to prevent oil leakage from the mating surface of a tank lid, or when tightness between two surfaces is required, such as when tightening a gasket I. This makes surface cleaning work even more important.

However, the substances that adhere to the mounting surface include cutting agents and chips during cutting, oil and rust preventive agents applied for rust prevention purposes,
Furthermore, there are dust particles scattered in the air.

Conventionally, most of the assembling work has been carried out by the assembling worker cleaning the mounting surface with a cloth or the palm of his hand as described above.

However, as assembly work is increasingly automated and labor-saving, there is an increasing demand for automating the cleaning work of the mounting surface.

In general, existing tools or devices that automatically clean surfaces include wipers made of polymeric materials used for cleaning sliding guide surfaces of machine tools, etc., and vacuum cleaners used in general households. There are vacuum cleaners, rotary brushes, etc., and it is possible to automate the process using them, but according to the inventor's various experiments, all of them have various drawbacks as described below, making them impractical. Ta.

In the case of a set of wipers for sliding guideways, it is possible to remove oil and dirt by pressing the wiper against the sliding surface with an appropriate surface strength, but as the work is repeated, oil and dirt accumulates on the wiper and the Removal ability is severely degraded.

Also, this method essentially concentrates the oil and dirt in one place rather than removing it, so strictly speaking, separate equipment is required to further remove this collected oil and dirt. .

In particular, if there is a recess such as a hole in the mounting surface, it is inconvenient when parts are to be assembled into the recess due to oil and dirt gathered there.

Also, when trying to clean the mounting surface of parts sent in assembly line work, the purpose of conventional wipers is to clean a continuous plane, so if you use them as they are, the wiper will break at the cut in the cleaning surface (i.e. the cut in the part). There are many cases where the wiper gets stuck and can be damaged in a short period of time.

In the case of a vacuum cleaning type or a brush type, the viscosity of the oil is high, and the adhesion of oil and dirt to the mounting surface is large, so it is impossible to clean with just the suction power of the vacuum.

We also tried using a rotating brush to separate the oil and dirt from the mounting surface, and then using a vacuum to suck up the oil and dirt that were scattered by centrifugal force, but it was difficult to collect the sprayed oil, so we had to use a vacuum pump. The capacity is enormous and the noise is so loud that it is not practical.

Although it is conceivable to adopt the above method in a closed place, in order to automatically move parts in and out and other operations, a door for automatic opening and closing would be required, which would make the device rather complicated.

Furthermore, cleaning with a brush alone is not sufficient for the finish.

This is due to the fact that the density of the brush cannot be made fine.

According to the inventor's experiments and observations, it is thought that if the brush itself does not have the ability to absorb oil and dirt, there is a limit to the cleaning ability of the method using such a brush.

In addition to the above, we have conducted various experiments such as removing oil and garbage using chemicals and incinerating them using flames, but these have left problems during assembly in later processes and polluted the environment. It was difficult to achieve the level of cleanliness that was obtained.

To summarize the above, at present, the work of cleaning the mounting surfaces of mechanical parts is often performed during assembly work, but it is not performed as an auxiliary work when assembling parts. was.

Therefore, before assembly work was fully automated, such cleaning work had not been treated as an independent process, and therefore, almost no equipment for automating such cleaning work had been developed. (2) Moreover, the use of existing wiper sets, brush types, etc. has drawbacks due to their respective structures.

The purpose of the present invention is to provide a new mounting surface that takes into consideration the current state of technology in this field as described above, and on the other hand, the need for automating the cleaning process in order to automate assembly and assembly work and save labor. to provide automatic cleaning equipment.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic front view of a cleaning device according to the present invention, and FIG.
The figure is a side view of FIG. 1.

Here, FIG. 1 and FIG. 2 will be explained in detail.

Reference numeral 11 denotes a mechanical component having a surface to be cleaned on its upper surface, hereinafter referred to as a workpiece, and the upper surface 12 of the workpiece 11 is the surface to be cleaned.

13 is a positioning device that supports the lower part of the workpiece 11 and performs relative positioning between the pallet 14 and the workpiece 11. In the example shown in this figure, there are four butts (hereinafter referred to as rocket Workpiece 11 is placed on top of the piece.
Positioning is performed by mounting the

15 is a bed, on which a pallet 14 is placed.

Although not shown in the drawings, a mechanism for positioning the pallet 14, a clamping mechanism, and the like are housed in the bed 15.

Further, a column 16 whose relative position with respect to the bed 15 has been adjusted is attached to the upper half 18 of the column 16 by a tightening bolt 17, and two rails 19 are provided on the front side and one on the rear side. The cleaning device 20 is mounted horizontally on the same rail 19 via a wheel group 26.
is listed.

Furthermore, two hydraulic cylinders 23.2 are installed in the upper column half 18.
5 is mounted on the tower as shown in the figure, and a preparation stand is attached to the plunger part of the hydraulic cylinder 23.
It is located close to the left edge of the

22 is a roller that supports the upper and lower surfaces of the preparation table 21;
A is a stand for fixing the roller 22 to the middle upper surface of the column 16.

A pedestal 24 is attached to the tip of the plunger 25a of the hydraulic cylinder 25, and the pedestal 24 is fixedly connected to the upper frame 20a of the cleaning device 20. Therefore, when the plunger 25a reciprocates, the cleaning device 20 moves. It is designed to move in the left-right direction in FIG. 1 via a wheel group 26.

Next, details of the cleaning device 20 will be explained.

The device 20 includes a front cover 28, a rear cover 40, and the upper frame 20a, and the two covers 28, 40 are connected to each other by four tie bolts 27 on the outer periphery so as to maintain a predetermined gap.

Three of the aforementioned wheel groups 26 and two wheels are rotatably attached to the front cover 28 and the rear cover 40, respectively.
It is designed to rotate and move on 9.

As shown in FIG. 3, the shafts that pass through the front lid 28 and the rear lid 40 are a feeding shaft 29, a winding shaft 30, a driving shaft 37, and a fixed shaft 3.
4. There are five clevis shafts 39 (when the hydraulic cylinder 53 is extended or contracted, the hydraulic cylinder 53 makes a rocking motion, and the shaft located at the center of its movement is referred to as the clevis shaft in this text), of which the coaxial shaft 29, 30.37 is front lid 28 rear lid 40
It is rotatably supported by a bearing 41 fitted in the.

(See FIGS. 4 and 6) The shafts 34 and 39 are fixedly attached by bearing nuts 42.

(See Fig. 5) In addition, a moving shaft 35 and a roller shaft 36, which are not in a direct fastening relationship with the front lid 28 and the rear lid 40, are suspended by various elements described below, and the motor shaft 38 is connected to the rear lid 40.
It is supported by

A total of eight shafts are arranged as shown in FIG. 3.

As can be seen from the figure, the roller shaft 36 has an arm 54.55.
The moving shaft 35 is rotatably coupled to one end (load section 56) of the hydraulic cylinder 53, and the moving shaft 35 is coupled to the arms 51, 54.

Further, as described above, the other end of the hydraulic cylinder 53 is rotatably connected to the Clegos shaft 39.

Therefore, the hydraulic cylinder 53 is energized and its plunger 5
When 3a expands and contracts, the center of the roller shaft 36 moves via the arm 55 on the circumference around the drive shaft 37 in the direction of the dotted arrow.

When the roller shaft 36 moves, the roller shaft 36 moves from the center position of the fixed shaft 34 to the center position of the movable shaft 35.
The length of the arm 6 to the center remains almost unchanged due to the intervention of the arms 51 and 54.

Next, the inter-shaft coupling and internal shaft structure for the eight shafts mentioned above are explained in the fourth section.
This will be explained in more detail with reference to FIGS. 6 to 6.

FIG. 4 shows an axial cross section of the feeding shaft 29 and the winding shaft 30.

A torque motor 43 is screwed to the rear cover 40, and its shaft is inserted into a hole carved in the end face of the payout shaft 29 (or the winding shaft 30) and connected with a key.

Further, a flange portion 44 is formed on the front side of the front lid 28, and a leaf spring 45 is screwed at several locations on the outer circumference at the tip of the flange portion 44, and a core material 46, which will be described later, is installed concentrically with respect to the feeding shaft 29. Rotation is transmitted by a leaf spring 45 that contacts the inner surface of the concentric village.

32 is a roll of cloth or non-woven fabric used for cleaning work, which is wound around a core material 46. At the right end of the feeding shaft 29 (30), a fabric presser foot 47 integrally formed with a handle 49 is coupled to a pin 50 implanted in the shaft 29 (30) via a spring 48 to the bayonet 1.

FIG. 5 shows an axial cross section of the fixed shaft 34.

In the figure, the fixed shaft 34 is fixed to the front and rear lids 28, 40 by a head 34a and a bearing nut 42, and two arms 51 are fixed to the coaxial 34 by bearings 41a.
is rotatably connected.

(In the following description, the symbol 41a is used for all bearings fitted between the front and rear covers 28 and 40.

) 52 are collars provided to prevent the bearing 41a from shifting in the axial direction.

The clevis shaft 39 has exactly the same mounting structure as the fixed shaft 34 shown in FIG.
(portion supported by) 53a is slidably fitted.

(Not shown) FIG. 6 is a developed view of the moving shaft 35, roller shaft 36, drive shaft 37, and motor shaft 38.

In the figure, the moving shaft 35 is rotatably coupled to the other ends of the two arms 51 by a bearing 41a, and two arms 54 are connected to the bearings 41a inside the arms 51.
The other end of the arm 54 is rotatably attached to the roller shaft 36 via a bearing 41a.

In addition to the arm 54, an arm 55 and a load portion 56 of the hydraulic cylinder 53 are attached to the roller shaft 36 as shown in the figure, and a key 60 is attached to the center of the roller shaft 36.
A timing pulley 60a is fitted through b.

Reference numeral 57 denotes collars that maintain gaps between the bearings 41a and the timing pulley 60a on the roller shaft 36.

Further, a rubber roller 58 is attached to the right end of the roller shaft 36 (to the right of the front lid 28) via a key 58a, and the rubber roller 58 is fixedly tightened with a bearing nut 59.

Note that the roller 58 does not necessarily need to be made of rubber, as long as it has appropriate elasticity.

As mentioned above, the drive shaft 37 is rotatably mounted between the front cover 28 and the rear cover 40, and the arm 55 is similarly mounted via a bearing 41a, and two timing pulleys 60b are mounted at the center of the shaft. , 62a are the keys 6 0b' , 6 2
It is fixed by a'.

Reference numeral 66 denotes collars for maintaining the distance between the bearings 41, 41a of the coaxial shaft 37 and the timing pulleys 60b, 62a.

A drive roller 64 is attached to the right end portion of the drive shaft 37 with a key (not shown) and a bearing nut 65.

The driving roller 64 has a large number of metal needles planted on the surface of the plastic roll main body while maintaining a constant angle with the normal line thereof.

Also, timing bell 1 is used for timing bells 60a and 60b.
61 and the same two pulleys 60a, 60
The magnitude relationship of b is selected so that the circumferential speeds of the rubber roller 58 and the driving roller 64 are equal.

The motor shaft 38 is a rotating shaft of a motor 68 with a reducer screwed to the rear cover 40, and a key 38a is provided on the outer periphery of the right end of the same shaft.
Timing pulley 6 2 by bearing nut 38b
b is installed.

The pulley 62b is connected to the above-mentioned timing pulley 62a by a timing belt 63, and its rotation is decelerated toward the drive shaft 37.

In addition to the above configuration, a remaining amount detection mechanism 69 for detecting the remaining amount of the scroll 32 is further attached to the front surface of the front lid 28.

As shown in FIG. 1, the arm 7 has a shaft 70a protruding forward from the front cover 28 and is rotatably attached to the same shaft 70a.
0 and a follower 74 that contacts the outer periphery of the scroll 32 at its tip end, and a limit switch 71 that detects the rotation angle of the arm 70 is attached to each of them.

FIG. 7 shows a mechanism for detecting the number of rotations of the winding shaft 30. The number of revolutions is detected by the cooperation of a proximity switch 73 attached to the front cover 28 and a bottle 72 protruding from the outer periphery of the winding shaft 30. It is supposed to be done.

Next, the operation will be explained according to the sequence.

In Figures 1 and 2, the hydraulic sill 25 is located at the left end (
The hydraulic cylinder 53 is at the ascent limit (backward limit), and the hydraulic cylinder 23 is at the left end (backward limit).

Then, set the scroll 32 on the feeding shaft 29.
1 is pulled out to the winding shaft 30 via the moving shaft 35, rubber roller 58, and drive roller 64 as shown in the figure, and the tip is wound around the winding shaft 30.

Next, 1 which is directly connected to the feeding shaft 29 and the winding shaft 30
・The motors 43 are all excited in the direction of winding the cloth 31 (in FIG. 1, the shaft 29 is clockwise and the shaft 30 is counterclockwise), but the motor motor 68 with a speed reducer is de-energized and in a depressed state. Therefore, since the drive shaft 37 does not rotate and the rotational resistance is large, the feed shaft 29 and the take-up shaft 30 do not rotate, and the fabric 31 is in a state where tension is applied to the left and right sides of the first drive roller 64. .

Furthermore, in this state, there is a gap in the vertical direction between the outer peripheral surface of the rubber roller 58 and the upper surface 12 of the workpiece 11, so the bullet 14 is carried into the predetermined position from the left side.

Next, when the positioning clamp is completed, a ready signal is transmitted to the cleaning device 20, and the hydraulic cylinder 23 is subsequently driven to the right and moved forward.

As a result, the preparation table 21 is projected so as to line up with the left end of the right workpiece 11.

When the hydraulic cylinder 25 is at the backward limit in FIG. It turns, moves downward, hits the top of the preparation table 21, and stops.

Since the preparation table 21 is arranged so as to extend the mounting surface (surface to be cleaned) of the workpiece 11, when the roller shaft 36 moves along the surface to be cleaned, as will be described later, the preparation table 21,
The upper surface 12 of the workpiece 11 will be moved continuously.

This means that if the preparation table 21 is not provided, the roller shaft 36, cloth 31, etc. will be damaged at the left corner of the ten-face 12.

A preparation table 21 is provided to prevent this damage.

During the above stroke of the hydraulic cylinder 53, the moving shaft 35
rotates slightly counterclockwise about the fixed shaft 34 due to the above movement and the relationship between the arms 51 and 54.

In addition, even if the length of the cloth 31 is too large or too short due to these operations, the winding mechanism (feeding shaft 29
, or the winding shaft 30) rotates, and tension is constantly applied to the cloth 31.

As mentioned above, the purpose of the moving shaft 35 is to prevent the length of the cloth 31 from changing significantly during the vertical movement of the roller shaft 36, and to prevent the "driving" of the feeding shaft 29 from becoming too large, thereby preventing the cloth 31 from breaking. This has a positive effect on the lifespan of Moke 43.

Furthermore, as a method to reduce the above-mentioned "drift", the fixed shaft 34
It is preferable to set the center position of the scroll 32 wound around the feeding shaft 29 at an intermediate position between the feeding position at the maximum diameter and the feeding position at the minimum diameter.

By shifting in this way, when the diameter of the roll 32 gradually decreases, the cloth 31 will move from the unwinding point of the roll 32 on the unwinding shaft 29 to the clean point position directly below the roller shaft 36, circumscribing the moving shaft 35. It is effective in reducing changes in the developed length of

Now, the next sequence is to excite the hydraulic cylinder 25 to the right, move the cleaning device 20 to the right on the rail 19, drive the motor 68 one rotation counterclockwise, and drive the timing belt 6.
When the 1 drive roller 64 rotates in the same direction after passing through 3, a large number of needles planted on the surface of the roller 64 successively pierce the fabric 31 and move the fabric 31 in the direction of an arrow (see Figs. 1 and 6). In other words, the cleaning process begins.

Such a cleaning process is similar to an uppercut in milling, in which a specific clean surface corresponds to a specific cloth position, and in fact, a new cloth 31 is constantly used to clean the ten surfaces 12 (of the workpiece 11). (mounting surface) will be cleaned.

Therefore, by selecting various rotational speeds of the motor 68 according to the rightward feed speed of the cleaning device 20 and the roller axis, the degree of cleaning can be controlled freely.

FIG. 1 shows a state in which the roller shaft 36 of the cleaning device 20 has reached the center of the mounting surface 12 of the workpiece 11 in this manner.

Continuing in this state, when the roller shaft 36 passes a little past the right end of the mounting surface 12, the excitation of the sill 25 to the right is stopped, and the rightward feeding of the cleaning device 20 and the feeding of the cloth 31, and therefore the driving of the motor 68, is stopped.

Next, the hydraulic cylinder 53 is excited upward, and the roller 58 moves upward away from the mounting surface 12 of the workpiece 11.

Furthermore, the hydraulic cylinder 25 retreats, and one cycle ends.

The above is for normal operation, but in addition, for example, scroll 3
When the diameter of 2 gradually decreases, the arm 70 connected to the follower 74 lowers, energizing the limit switch 71 and generating a caution signal.

If the fabric 31 breaks on the way, the first torque motor 43 will rise to its synchronous speed, and the fabric 31 will break from the pulse train generated by the cooperation with the pin 72 on the winding shaft 30 and the proximity switch 73.
Detects breakage and stops the entire machine.

The characteristics and effects of the present invention are summarized as follows.

■ According to the device according to the present invention, cleaning processing can be performed completely unattended on the mounting surface of workpieces that arrive continuously, and it is also possible to prevent abnormal conditions from occurring (such as breakage of the cloth 31 or the state where there is no remaining amount of the roll 32). Since it is equipped with a mechanism to detect these, it is reliable, and since the cleaning process of the surface with cloth is constantly wiping with a new cloth, its cleaning effect is very large.

■ The cloth can be simply set in a roll on the unwinding shaft, and after use, it can be taken out from the winding shaft and disposed of and incinerated, and no oil or dirt is scattered during the cleaning process6. ■ The present invention As seen in the embodiment, the roller shaft and the drive shaft are interlocked by a timing belt, and the feed shaft, moving shaft, roller shaft, and drive shaft are each rotatably connected by an arm, and the winding shaft is The unrolling shafts are given rotational torque in opposite directions, so even when the roller shafts move up and down, the unfolded length of the cloth remains approximately constant, so the so-called "cloth"
No sagging occurs.

(2) To drive the cloth, it is common to use a winding shaft to generate winding torque or to drive the surface of the cloth with a nib roll, but the apparatus according to the present invention does not employ either of these methods and instead uses a needle roll.

The above-mentioned method in which the winding torque is generated only by the winding shaft requires a complicated control device to control the linear velocity at a constant level, and the surface drive method using Nitub rolls, etc., eliminates liquids such as oil that are absorbed during the first-stage cleaning process. This causes inconveniences such as dripping onto the mounting surface of the workpiece again.

■ In this example, the mounting surface of the workpiece (the surface to be cleaned) was described as a flat surface, but since a hydraulic cylinder is used to move the roller shaft in the vertical direction, the shape of the mounting surface can be changed, for example, as shown in Fig. 1. As long as it is formed in a straight line in the direction perpendicular to the plane of the paper, it does not need to be flat.

Furthermore, even if the rubber roller is not flat or linear, the cleaning effect can be sufficiently improved by elastic deformation of the rubber roller to a small extent.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of the device according to the invention, and FIG.
The left side view of the figure, Figure 3 is a sectional view taken along line A-A in Figure 2, Figure 4 is
The figure is a cross-sectional view taken along the line B-B in Figure 3, Figure 5 is a cross-sectional view taken along the line C-C in Figure 3, Figure 6 is a cross-sectional view taken along the line D-D in Figure 3, and Figure 7 shows the fixed shaft and front cover. FIG. 6 shows the installed proximity switch mechanism. 11...Work, 12...Mounting surface, 1
3... Locate piece, 14... Ballet, 15... Bet, 16... Column,
17...Tightening bolt, 18...Upper half of column, 19...Rail, 20...Cleaning device, 20a...Top surface Frame, 21...
...Preparation table, 22...Roller, 22a...
...Base, 23,25.53...Hydraulic cylinder, 24...Base, 25a...Plunger, 26...Wheel group, 27... ...Tie hold, 28...Front cover, 29...Feeding shaft, 30:...Take-up shaft, 31...
・Cloth, 32...Scroll, 33..., 34...
...Fixed axis, 35...Moving axis, 36...
...Roller shaft, 37... Drive shaft, 38...
...Moke shaft, 38a...Key, 39b...
...Bearing reets 1-, 41. 41a...Bearing, 42...Bearing nut, 43...1
~ Lukmoku, 44...Flange part, 45...
...Plate spring, 46 ... Core material, 47 ...
... Presser foot, 48 ... Spring, 49 ...
Handle, 50... Bin, 51... Arm, 52... Collar, 54... Arm,
55...Arm, 56...Load section,
57... Collars, 58... Rubber roller, 58a... Key, 59... Bearing nut, 60a... Timing pulley, 60b'
...Key, 61 ...Timing bell 1
・, 62a, 62b...timing booley,
62a...Key, 63...Timing belt, 64...Drive roller, 65...
・Bearing nut, 66... Collars, 68...
... Mork with reducer, 69 ... Remaining amount detection mechanism, 70 ... Arm, 70a ... Axis, 7
1... Limit switch, 72... Pin, 73... Proximity switch.

Claims (1)

[Claims] 1 A flexible material with absorption capacity wound into a roll, a feeding shaft that supports the roll-shaped flexible material and is given a rotational torque opposite to the direction of its feeding, and a coaxial shaft that is fed out as a pair. A winding shaft to which rotational torque is applied in the direction of winding the flexible material, a needle-shaped roll disposed between the two shafts and formed by planting a large number of needles on its outer peripheral surface, and a needle-shaped roll a rotational drive mechanism that rotationally drives the needle roll, an elastic roller that presses the flexible portion between the needle roll and the feeding shaft against the mounting surface to be cleaned, and a roller that presses the elastic roller against the mounting surface or separates it from the mounting surface. A cleaning device having a drive mechanism, each of the above-mentioned components, and the entire cleaning device in a state where the elastic roller is pressed in the mounting direction via a flexible member and the flexible member is being sent toward the winding shaft. a reciprocating device that drives the flexible member along the mounting surface and in the feeding direction of the flexible material, and a preparation table that is adjacent to the end of the mounting surface and has a surface that coincides with the extension surface of the mounting surface. Automatic cleaning device for the mounting surface.