JP3904619B2 - Buffing board - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an improvement of a buffing machine in which a board body having a fiber or sponge buff at the front part is attached to various electric or air-driven polishers to perform various processing and surface treatments such as a plate material.
[0002]
[Prior art]
With the recent spread of automobiles, it has become common to perform a wax treatment on the vehicle body. In connection with this treatment, a polisher is a tool that polishes the surface of the body of the automobile by electric drive or air drive. This polisher is formed by attaching a buffing machine such as sponge or mop to the tip of the output shaft of an electric or air-driven tool, and the buffing machine has a buffing body on the surface of a rotating board to be attached to a coupler of various tools.
For such a polishing operation using a buffing machine, conventionally, “hair buff” and “sponge buff” are selectively used depending on the state of the coating film to be surface-treated.
This is because, for example, when a scratch on a paint film of an automobile body is processed by a surface polishing process, it cannot be processed by a simple single polishing process, but a complicated process is performed depending on the state of the scratch and the stage of the polishing process. It is customary to process sequentially. Generally speaking, when it comes to polishing treatment, there is a strong image like the treatment of continuously scratching the scratched part on the coating to make it invisible, but strictly speaking, in such a simple operation, the coating portion It is difficult to remove a laceration. This is because most of the scratches on the car body are not attached to the paint film, and the negative part where the paint is no longer present. The operation of “removing scratches” needs to be processed by repeating the following steps. First of all, the worker applies a “slighter scratch” more extensively than the “scratch” to be erased on the upper surface of the “scratch” portion of the automobile body to be erased as the first step. Next, the “slighter finer scratch” is similarly applied over a wide area on the upper surface of the “slightly finer scratch”. In other words, a relatively large scratch on the body of an automobile is spread over a wide area while gradually subdividing it into fine scratches, and finally this finely divided “minimal scratch” is cut until it no longer exists. -It will go through a stage of polishing and finishing. For this reason, the type of “buff” is properly used according to the stage of processing “scratches” on the body of the automobile. More specifically, this means that the rough buff is used mainly for the “buff buff”, and the fine cutting / polishing process is mainly used for the “sponge buff”. Rather than using “buff buffs” and “sponge buffs” differently, there are multiple types depending on the roughness to be processed, and these multiple types of buffs are processed in combination with compounds with different roughnesses. Yes.
[0003]
[Problems to be solved by the invention]
However, in the conventional method of cutting and polishing while using many different types of buffs depending on the polishing stage of the body of an automobile, etc., various types of buffs are prepared as tools in the workplace in advance, and the polishing process Therefore, there is a problem that the work efficiency is extremely poor as a work site because the cutting process must be performed every time the change occurs.
Therefore, the present invention was made to solve such problems, and a buffing machine capable of accurately adjusting the cutting force according to the operator's intention from a strong cutting force to a weak cutting force. The purpose is to provide.
[0004]
The invention made to achieve the above object includes an attachment disk attached to a drive shaft of various polishers for cutting or polishing an automobile body surface, a buff body attached to the front surface of the attachment disk, and the attachment disk. And a stress transmission member attached between the buff body, the stress transmission member is an elastic body made of a sponge material, and the stress transmission member is a circular or oval through hole. The total area of these through holes is 20 to 70% of the area of the front surface of the stress transmission member.
It is characterized by being. If the total area of the through holes is larger than 70%, the frictional resistance due to stress concentration applied to the plate portion, which is the portion excluding the area of the through holes from the area of the front surface of the stress transmission member, tends to be excessive, whereas 20% It is because the effect by stress concentration on a board part is not fully acquired as it is less than.
[0005]
According to the buffing machine of the present invention, when the buffing machine is attached to the drive shaft of various polishers and the polisher is started, the drive shaft of the polisher rotates and the buff body rotates. Therefore, the operator holds the polisher and presses the buff main body against various plate bodies to perform the cutting / polishing process. The buffing machine of the present invention exhibits an extremely wide cutting / polishing force from a weak cutting / polishing force to a strong cutting / polishing force with one kind of buff body.
[0006]
In addition, according to the buffing machine of the present invention, by using a fine material on the buffing surface, the scratches remaining on the coated film after polishing are made fine and shallow, but on the other hand, it has a strong grinding force. Can do. That is, paying attention to the internal structure of the buff, which has not been considered in the past, by giving the buffing machine a stress concentration function, the force pressed on the front surface of the disk body on average is pushed through the stress transmission member per unit area. The pressure can be increased several times and transmitted to the buff surface, the width of the cutting force can be widened, and a polishing operation that can be cut but not fogged can be realized.
[0007]
Hereinafter, reference examples to which a buffing board is applied will be described with reference to the drawings. FIG. 1 is a partially broken perspective view of a bristle buff of a first reference example to which a buffing machine is applied. As shown in FIG. 1, the bristle buff of this reference example is used by being detachably mounted on a mounting disk 1 mounted on a rotating shaft of an electric or air-driven polisher. Hard sponge disk 2 that comes into contact with the front surface, stress transmission disk 3 made of an elastic material such as hard rubber, urethane foam, and synthetic resin bonded to the front surface of hard sponge disk 2, and hard from the front surface of stress transmission disk 3 The buff body 4 is fixed so as to cover up to the body of the sponge disk 2 (the hair buff body may be detachable). Of these, a large number of protrusions 3a are provided at regular intervals on the front surface of the stress transmission disk 3, but the protrusions 3a have a cylindrical shape and the front surface of the stress transmission disk 3 according to the application. The size and number of the protrusions 3a are adjusted so as to be an arbitrary area between 30% and 80%.
[0008]
Next, the operation and effect of the hair buff of the first reference example having the above configuration will be described. First, when using the hair buff of this reference example, as shown in FIG. 2, the hair buff is attached to the rotating shaft of various commercially available electric or air driven polishers P. Next, when the starter switch PW of the polisher P is turned on, the buffing board A starts to rotate. Therefore, the grip G of the polisher P is held and the processing surface of the buff is pressed against the surface to be processed for cutting.
[0009]
In the hair buff of the first reference example, the stress transmission disk 3 provided with a large number of protrusions 3a is provided inside the hair buff so that the stress that presses the treated surface of the hair buff against the work surface is weak. The protrusion 3a of the transmission disk 3 hardly acts on the back surface of the processing surface, and the processing surface exhibits only a cutting force comparable to that of the conventional one. On the other hand, when the pressure that presses the treated surface of the buff against the work surface is gradually increased, the pressure applied to the rear surface of the stress transmission disk 3 gradually increases and is transmitted through the inside of the stress transmission disk 3. Further, concentrated stress is generated from the front end surface of the protrusion 3a, and a large pressure is generated on the back surface of the processing surface. As a result, the cutting force generated on the processing surface by the processing surface gradually increases, and a cutting force several times larger than the conventional one is exhibited. Due to this action, the buff of the present reference example can be controlled from a conventional buff, in which the operator freely controls from a weak cutting force to a strong cutting force by adjusting the force with which the operator presses the polisher P against the work surface. An extremely wide cutting force that could not be realized at all can be exhibited.
[0010]
Next, a second reference example will be described based on FIG. FIG. 3 is a partially broken perspective view of a “sponge buff” of the present reference example to which a buffing machine is applied. The “sponge buff” of this reference example has a stress transmission disk 5 made of hard rubber, urethane foam, synthetic resin, etc., in which a hole for attaching to the rotation shaft of various polishers is formed at the center of the rear surface. The sponge buff body 6 is bonded from the front surface to the body portion. Among these, a large number of protrusions 5 a are provided on the front surface of the stress transmission disk 5 at regular intervals. The protruding portion 5a has a cylindrical shape, and the size and number of the protruding portions 5a are set so as to have an arbitrary area between 30% and 80% of the area of the front surface of the stress transmission disk 5 depending on the application. Adjust to form. In the “sponge buff” of this reference example configured as described above, the obtained actions and effects are the same as those of the first reference example, and an extremely wide range of cutting ability compared to the conventional “sponge buff”. In particular, in the case of “sponge buff”, fine cutting force adjustment becomes easy.
[0011]
In the first reference example and the second reference example, the protrusions provided on the front surface of the stress transmission disk at a predetermined interval are cylindrical in shape. For example, the protrusions shown in FIG. As in the third reference example, even if a large number of prismatic protrusions 7a are formed on the front surface of the stress transmission disk 7 of the “sponge buff”, the same actions and effects as in the reference example can be obtained.
[0012]
Next, an embodiment of the present invention is shown in FIGS. The buffing machine of the present embodiment is formed by forming a plurality of through holes in the stress transmission member instead of the protrusions of the first to third reference examples. As shown in FIG. 5, a stress transmission member 8 having circular through holes 8 a to 8 c and an oval through hole 8 d is attached to the surface of the soft sponge disk 2. On the surface of the stress transmission member 8, a buff body made of a material such as corten is attached so as to cover the through holes 8a to 8d. The reason why the shape of the through holes 8a to 8d is circular or oval is that the workability of the soft sponge disk 2 is improved and the curved surface of the vehicle body or the like is polished. This is to make it difficult to cause deformation of the soft sponge disk 2 by bringing the edge portion made of the sponge material of the through hole into contact with each other. Each of the through holes 8a to 8d is formed perpendicular to the surface of the stress transmission member 8. The through holes are arranged in the center of the disk with a through hole 8a and a concentric circle centering on the through hole 8a. The through holes 8b are provided at the outer sides thereof, and through holes 8c and 8d are provided at substantially equal intervals on the outside thereof. The total area of each through hole is set to be 20% to 70% of the area of the front surface of the stress transmission member 8 and is a portion obtained by excluding the areas of the through holes 8a to 8d from the area of the front surface of the stress transmission member 8. An appropriate frictional force is generated in the plate portion 8f (between the through holes 8a to 8d). When a pressing force is applied to the soft sponge disk 2 at the time of polishing, the stress is transmitted to the stress transmitting member 8, and the work surface is polished by pressing the back surface of the buff body. According to the present embodiment, since the stress transmission member 8 is provided with the through holes 8a to 8d, the production of the stress transmission member is simplified. Specifically, the through hole can be formed by pressing a disc body such as a sponge with a cutter having a predetermined hole shape. Therefore, mass production is simplified and manufacturing costs can be reduced.
[0013]
In the case of the present invention, the through hole 8d formed on the outermost radial direction of the stress transmission board 8 extends radially inward from the through hole 8c. As a result, when the circumferential trajectory of the surface of the stress transmission board 8 is traced, the concave portions and the convex portions are alternated, and the processing surface is uniformly polished. The shape of the through hole can be changed to an ellipse in addition to the circular or oval shape. As another modification, the shape of the hole surface of the through hole can be a tapered surface.
[0014]
Next, a fourth reference example is shown in FIGS. In the buffing machine according to this reference example, the shape of the through hole is a long hole extending rearward in the rotation direction of the buffing machine. As shown in FIG. 8, triangular holes 9 a, 9 b, 9 c are formed in a spiral shape so as to spread radially outward from the center of the front surface of the stress transmission board 9. The bases of the long holes 9a, 9b, 9c are curved and extended toward the rear side in the rotation direction of the buffing machine as going from the center of the stress transmission board 9 to the radially outer side. Further, ribs 9f are provided between the long holes 9a, 9b, and 9c to increase the strength of the stress transmission board 9. The formation positions of the ribs 9f are shifted in the radial direction with respect to the ribs 9f adjacent in the circumferential direction so as not to be continuously arranged in the circumferential direction. According to this reference example, since the long holes 9a, 9b, 9c extend to the rear side in the rotation direction of the buffing machine, polishing scraps and the like are easily guided to the long holes 9a, 9b, 9c during the polishing to the outside of the buff surface. Sent out. Therefore, the finish of the polished surface is further improved.
[0015]
【The invention's effect】
As described above, according to the buffing machine of the present invention, the stress transmission comprising the elastic body having a large number of through holes between the disk body that is detachably attached to the drive shaft of various polishers and the buffing body. Because it is configured to cut or polish the surface of various plate bodies by providing members, the operator can freely control from weak cutting force to strong cutting force by adjusting the force of pressing various polishers against the work surface, We succeeded in demonstrating an extremely wide cutting force that could not be achieved with conventional buffs. The total area of each through hole is set to be 20 to 70% of the area of the front surface of the stress transmission member, and the plate portion 8f between the through holes 8a to 8d corresponding to the remaining area excluding the through hole. Since moderate frictional force is generated, workability is improved. In addition, when polishing a resin coating on a curved surface of a vehicle body or the like, the edge made of a sponge member in the through hole smoothly contacts the convex surface of the surface to be polished. It is difficult to deform and has good workability. Moreover, a through-hole can be formed by pressing a disk body, such as sponge, with a predetermined cutter. Therefore, mass production is simplified and manufacturing costs can be reduced. The buffing machine of the present invention eliminates the troublesome and troublesome work of properly using various types of buffs with different cutting forces according to the stage of the cutting process accompanying the polishing process, improving workability and improving the efficiency of the entire work. It is an epoch-making invention that dramatically improves, and the benefits to the industry are immeasurable.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view showing a buffing machine according to a first reference example.
FIG. 2 is a perspective view showing the polisher.
FIG. 3 is a partially broken perspective view showing a buffing machine according to a second reference example.
FIG. 4 is a partially broken perspective view showing a buffing machine according to a third reference example.
FIG. 5 is a perspective view showing a buffing machine according to an embodiment of the present invention.
FIG. 6 is a plan view showing a buffing machine according to an embodiment of the present invention.
FIG. 7 is a perspective view showing a buffing machine according to a fourth reference example.
FIG. 8 is a plan view showing the buffing board.
[Explanation of symbols]
1 Mounting disk 2 Hard sponge disk 3, 5, 7, 8, 9 Stress transmission disk (stress transmission member)
3a, 5a, 7a Protruding part 4 Buff body 6 Sponge buff body 8a-8d Through hole 9a-9c Slot

Claims (1)

A mounting disk attached to the drive shaft of various polishers for cutting or polishing the body surface of an automobile, a buff body attached to the front surface of the mounting disk, and stress transmission attached between the mounting disk and the buff body The stress transmission member is an elastic body made of a sponge material, and the stress transmission member has a circular or oval through hole, and the total area of these through holes is The buffing board is 20 to 70% of the area of the front surface of the stress transmission member.

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