JP6322538B2 - Masking member fixing method and masking member fixing device - Google Patents

Description

  The present invention relates to a masking member fixing method and a masking member fixing device for fixing a masking member for masking, and more particularly to a masking member fixing method and a masking member fixing device for fixing a sheet-like masking member to an inner peripheral surface of a cylindrical portion. .

  Conventionally, for a sliding member used for an automobile or the like that needs to be blasted on the inner peripheral surface of the cylindrical portion, for example, blasting is performed with a masking die placed on the inner peripheral surface of the cylindrical portion. The method of applying is adopted. According to this method, for example, even when a minute recess that becomes an oil reservoir is formed on the inner peripheral surface of the cylindrical portion, it is only necessary to previously form a hole having the same shape as the minute recess in the masking mold. It is desirable from the viewpoint of cost and quality.

  However, in the above-described method of placing the masking die on the inner peripheral surface of the cylindrical portion and performing blasting, the masking die is brought into close contact with the inner peripheral surface of the cylindrical portion without a gap. There is a need. If there is a gap between the masking mold and the inner peripheral surface of the cylindrical portion, the same dimensions as the holes previously formed in the masking mold when blasting is performed. A concave portion having a shape cannot be formed on the inner peripheral surface of the cylindrical portion.

  For example, Patent Document 1 discloses a blasting masking member. Specifically, Patent Document 1 discloses that “a masking member having a cylindrical portion in which a pattern of through holes for forming a recess by blasting is formed, and the diameter of the cylindrical portion is the cylinder. The cylindrical portion is larger than or equal to the diameter of the cylindrical inner peripheral surface of the workpiece to be inserted and mounted, and the cylindrical portion is inserted into and mounted on the cylindrical inner peripheral surface of the workpiece. A masking member having an elastic deformation means for elastically deforming so that the diameter of the cylindrical portion is reduced is disclosed.

JP 2005-59127 A

  However, when performing blasting on the inner peripheral surface of the cylindrical shape portion, when using the masking member disclosed in Patent Document 1, the masking member is a relatively high rigidity material such as a metal material, If the masking member cannot be sufficiently adhered to the inner peripheral surface of the cylindrical part and the masking member has a relatively low rigidity such as a resin material, the sheet itself is likely to be deformed, and sufficient adhesion can be obtained. Absent. Therefore, when the masking member of Patent Document 1 is used, the adhesion to the inner peripheral surface of the cylindrical portion is not sufficiently maintained.

  The present invention has been made paying attention to such problems, and a masking member fixing method capable of sufficiently ensuring the adhesion between the sheet-like masking member and the inner peripheral surface of the cylindrical portion, and An object of the present invention is to provide a masking member fixing device.

  (1) The present invention relates to a masking member fixing method for fixing a sheet-like masking member to an inner peripheral surface of a cylindrical portion, and an arrangement step of arranging the masking member along the inner peripheral surface; A pressing step of holding the vicinity of the center of the cylindrical portion in the axial direction of the cylindrical portion disposed along the peripheral surface in a state pressed against the inner peripheral surface; and the vicinity of the center of the masking member on the inner peripheral surface And a fixing step for fixing the masking member to the inner peripheral surface in a state where the masking member is pressed against the inner peripheral surface.

  (2) In the fixing step, the masking member is fixed to the inner peripheral surface by pressing the masking member from the inside with a ring-shaped or C-shaped fixing member whose outer diameter can be expanded and contracted. The masking member fixing method according to (1) above, characterized in that:

  (3) The present invention also provides an end fixing step in which both end portions in the circumferential direction of the cylindrical portion of the masking member disposed along the inner peripheral surface are pressed and fixed from the inside by an end fixing member. The masking member fixing method according to the above (1) or (2), characterized by comprising:

  (4) According to the present invention, in the end fixing step, the end fixing member covers a gap between both ends in the circumferential direction of the cylindrical portion of the masking member arranged along the inner peripheral surface. The masking member fixing method according to (3) above, characterized in that.

  (5) The present invention is also a masking member fixing device for fixing the sheet-like masking member to the inner peripheral surface of the cylindrical portion, and pressing means for holding the masking member in a state of pressing the masking member against the inner peripheral surface; A masking member fixing device comprising: a fixing member arranging means for arranging a fixing member for fixing the masking member to the inner peripheral surface at a predetermined position in the cylindrical portion.

  (6) Further, in the present invention, the pressing unit includes a pressing portion that presses the masking member toward the inner peripheral surface, a pressing portion moving mechanism that moves the pressing portion in the axial direction of the cylindrical portion, The masking member fixing device according to (5), wherein the masking member fixing device is provided.

  (7) The masking member fixing device according to (5) or (6), wherein the fixing member is configured in a ring shape or a C shape whose outer diameter can be expanded and contracted. It is.

  (8) In the present invention, the fixing member disposing means may include a holding portion that holds the fixing member, an expansion / contraction portion that expands / contracts an outer diameter of the fixing member, and the holding portion in the axial direction of the cylindrical portion. The masking member fixing device according to (7), further comprising: a holding unit moving mechanism that moves the masking member.

  According to the masking member fixing method and the masking member fixing device according to the present invention, it is possible to achieve an excellent effect that it is possible to sufficiently secure the adhesion between the sheet-like masking member and the inner peripheral surface of the cylindrical portion.

It is the schematic which showed the method of inserting a masking member in the inside of a cylindrical part in the masking member fixing method which concerns on this invention. It is the schematic which showed the case where the inner peripheral surface of the cylindrical part which fixed the masking member using the masking member fixing method which concerns on this invention is blasted. (A) And (b) It is the schematic which showed the example of the fixing member for fixing a masking member. (A) And (b) It is the schematic which showed an example at the time of fixing both the edge parts in the circumferential direction of the cylindrical part of a masking member by pressing with an edge part fixing member. It is the schematic which showed the structure of the masking member fixing device 1 which concerns on this invention.

Hereinafter, preferred embodiments of a masking member fixing method and a masking member fixing device according to the present invention will be described in more detail with reference to the accompanying drawings.
First, the masking member fixing method according to the present invention will be described. FIG. 1 is a schematic view showing a method of inserting a masking member 20 into a cylindrical portion 30 in the masking member fixing method according to the present invention. Moreover, FIG. 2 is the schematic which showed the case where the internal peripheral surface of the cylindrical-shaped part 30 which fixed the masking member 20 using the masking member fixing method which concerns on this invention is blasted.

  The masking member fixing method according to the present invention is a masking member fixing method in which the sheet-like masking member 20 inserted into the cylindrical portion 30 is fixed in close contact with the inner peripheral surface of the cylindrical portion 30. In the masking member fixing method according to the present invention, the masking member 20 inserted into the cylindrical portion 30 is arranged along the inner peripheral surface of the cylindrical portion 30, and the axial direction of the cylindrical portion 30 (see FIG. 1 and FIG. 1). 2, in the vicinity of the center in the vertical direction), the masking member 20 is pressed against and held in close contact with the inner peripheral surface of the cylindrical portion 30, and the masking member 20 is in close contact with the inner peripheral surface of the cylindrical portion 30. Thus, the masking member 20 is fixed to the inner peripheral surface of the cylindrical portion 30.

  The masking member 20 used in the masking member fixing method according to the present invention is configured such that, for example, when hard particles are jetted onto the inner peripheral surface of the cylindrical portion 30 to form concave portions of a predetermined pattern, hard particles are not formed on the concave portions. This is to protect against being hit. The masking member 20 of the present invention is in the form of a sheet in which holes having a predetermined pattern are formed, and is rounded into a cylindrical shape by an operator so that the outer diameter is smaller than the diameter of the cylindrical portion 30. Can be inserted into the inside.

  The masking member 20 of the present invention can be made to adhere to the inner peripheral surface of the cylindrical portion 30 stably regardless of the material as long as it can be elastically deformed. Even if it is made of resin, it can be suitably used. In addition, the masking member fixing method according to the present invention is not limited to the shape of the work piece as long as the cylindrical member 30 is provided. For example, the inside of the cylindrical member 30 provided in a cylinder liner or a cylinder block of an automobile engine is used. It can be suitably used also when the masking member 20 is fixed to the peripheral surface.

  In the masking member fixing method according to the present invention, the masking member 20 is first inserted into a cylindrical portion 30 such as a cylinder liner in a state of being rolled into a cylindrical shape as shown in FIG. It arrange | positions in the predetermined position inside the part 30 (arrangement | positioning step). At this time, the force to return to the state before the masking member 20 is rolled into a cylindrical shape, that is, the restoring force of elastic deformation works, so that the masking member 20 is in a state along the inner peripheral surface of the cylindrical portion 30. It can be held in place.

  Next, after disposing the masking member 20 on the inner peripheral surface of the cylindrical portion 30, in the masking member fixing method according to the present invention, the masking member 20 is positioned near the center in the axial direction of the cylindrical portion 30 of the masking member 20. It is pressed against the inner peripheral surface of the cylindrical portion 30 and is held in close contact (pressing step). At this time, the portion for pressing the masking member 20 against the inner peripheral surface of the cylindrical portion 30 is located near the center in the axial direction of the cylindrical portion 30, so that the entire masking member 20 is sufficient for the inner peripheral surface of the cylindrical portion 30. Can be adhered to.

  Next, after the masking member 20 is held on the inner peripheral surface of the cylindrical portion 30, in the masking member fixing method according to the present invention, the close contact between the masking member 20 and the inner peripheral surface of the cylindrical portion 30 is sufficiently maintained. In this state, the masking member 20 is fixed to the inner peripheral surface of the cylindrical portion 30 (fixing step). At this time, the masking member 20 is pressed onto the inner peripheral surface of the cylindrical portion 30 and is fixed to the inner peripheral surface of the cylindrical portion 30 while maintaining a sufficiently adhered state, and then the method illustrated in FIG. Even when blasting is performed, the contact state between the masking member 20 and the inner peripheral surface of the cylindrical portion 30 can be sufficiently maintained.

  FIG. 2 shows an example of a method in which a cylinder liner 40 having a cylindrical portion 30 is used as a workpiece, and a minute concave portion serving as an oil reservoir is formed on the inner peripheral surface of the cylinder liner 40. In the case of forming a minute recess that becomes an oil reservoir on the inner peripheral surface of the cylinder liner 40 by using the masking member fixing method according to the present invention, as shown in FIG. In this state, the hard particles are sprayed while moving the hard particle spray gun 50 up and down in the direction of the arrow shown in the figure. In this example, the central axis of the cylinder liner 40 is set to be substantially perpendicular to the ground because the injected hard particles are fixed to the inner peripheral surface of the cylinder liner 40. This is because it can sufficiently collide up to the end of the 20 holes to form a minute recess having a uniform depth.

  Even in the case where a minute recess that becomes an oil reservoir is formed on the inner peripheral surface of the cylinder liner 40 by such a method, according to the masking member fixing method according to the present invention, the inner periphery of the masking member 20 and the cylindrical portion 30 is provided. Since the contact state with the surface can be satisfactorily maintained, a recess having the same size and shape as the hole formed in the masking member 20 can be stably formed on the inner peripheral surface of the cylindrical portion 30.

  FIGS. 3A and 3B are schematic views showing an example of the fixing member 5 for fixing the masking member 20. 3A and 3B show a cross section perpendicular to the axial direction of the cylindrical portion 30. FIG. In the masking member fixing method according to the present invention, the method for fixing the masking member 20 is not particularly limited, and various known techniques can be adopted, but in order to fix the masking member 20 more reliably and simply. In this case, it is preferable to fix the masking member 20 by a ring-shaped or C-shaped fixing member 5 whose outer diameter can be expanded and contracted.

  That is, the ring-shaped fixing member 5 (see FIG. 3A) or the C-shaped fixing member 5 (see FIG. 3B) whose outer diameter in a normal state is set to be equal to or larger than the inner diameter of the cylindrical portion 30, By appropriately elastically deforming or the like, the masking member 20 is placed in the cylindrical portion 30 with the outer diameter being smaller than the inner diameter of the cylindrical portion 30 and pressed from the inside by a restoring force or the like of elastic deformation. It is preferable to fix.

  By doing in this way, since it becomes possible to apply a pressing force substantially uniformly along the circumferential direction of the cylindrical portion 30 to the masking member 20, the masking member 20 is attached to the inner peripheral surface of the cylindrical portion 30. It can be securely fixed in a state where it is sufficiently adhered to. Further, the masking member 20 can be reliably fixed without hindering the movement of the hard particle spray gun 50 and the like. Further, for example, as shown in FIG. 3B, by providing an engagement hole 5a or the like in the C-shaped fixing member 5, the fixing member 5 is expanded or contracted by a method similar to a conventional hole snap ring or the like. Therefore, it is possible to arrange the fixing member 5 and fix the masking member 20 very simply and quickly.

  The structure for expanding and reducing the outer diameter of the fixing member 5 is not particularly limited, and various known structures can be employed. For example, a ring-shaped or C-shaped member such as rubber, resin, or metal may be elastically deformed as it is, or an appropriate expansion / contraction mechanism may be provided. Further, the fixing member 5 may be configured by rounding a plate spring, that is, a band-shaped member made of metal, resin, or the like. Further, the position where the fixing member 5 is disposed is not particularly limited, but it is preferable to dispose the fixing member 5 on both sides in the axial direction of the cylindrical portion 30 with respect to the pressing portion in the pressing step described above (FIG. 4). (See (b) and FIG. 5).

  4A and 4B are schematic views illustrating an example in which both end portions in the circumferential direction of the cylindrical portion 30 of the masking member 20 are pressed and fixed by the end fixing member 8. . 4A shows a cross section perpendicular to the axial direction of the cylindrical portion 30, and FIG. 4B shows a cross section parallel to the axial direction of the cylindrical portion 30. FIG. 4A shows a cross-sectional view taken along line AA in FIG. In the masking member fixing method according to the present invention, both end portions in the circumferential direction of the cylindrical portion 30 of the masking member 20 when the masking member 20 is arranged along the inner peripheral surface of the cylindrical portion 30 are end fixing members. 8 is preferably pressed and fixed (end fixing step). Further, in this case, when a gap G is generated between both ends in the circumferential direction, it is preferable to cover the gap G with the end fixing member 8.

  By doing so, it is possible to suppress the lifting due to bending or deformation at both ends in the circumferential direction of the masking member 20, and to improve the adhesion of the masking member 20 to the inner peripheral surface of the cylindrical portion 30. Further, by covering the gap G generated between both ends in the circumferential direction, unnecessary blasting or the like can be prevented from being applied to the gap G portion. As shown in FIGS. 4A and 4B, the end fixing member 8 has a cylindrical portion together with the masking member 20 by the fixing member 5 provided with a recess 5b into which the end fixing member 8 is fitted. Although it is preferable that it is pressed toward the inner peripheral surface of 30, a dedicated member for pressing and fixing the end fixing member 8 may be used separately.

  The shape of the end fixing member 8 is not particularly limited. However, as shown in FIGS. 4A and 4B, the end fixing member is configured in a rod shape or a strip shape, and the masking member 20 is formed. It is preferable that the entire range of the end portion in the circumferential direction can be pressed and fixed at a time. Moreover, as shown in FIGS. 4A and 4B, the end fixing member is preferably configured to be capable of pressing both of the two end portions in the circumferential direction of the masking member 20 with one member. In this case, the gap formed between the both ends is automatically covered.

  Next, the masking member fixing device 1 according to the present invention will be described. FIG. 5 is a schematic view showing the structure of the masking member fixing device 1. As shown in FIG. 5, the masking member fixing device 1 presses the support base 10 that supports a workpiece such as a cylinder liner 40 including the cylindrical portion 30 and the masking member 20 against the inner peripheral surface of the cylindrical portion 30. A pressing unit 60 that holds the fixed member 5 in a closed state, and two fixing member disposing units 70 that dispose the fixing member 5 at a predetermined position in the cylindrical portion 30.

  The support 10 supports a workpiece such as the cylinder liner 40 and is positioned at a predetermined position. The support table 10 may be fixed to the masking member fixing device 1, or may be used as the support table 10, for example, a work pallet for processing workpieces.

  The pressing means 60 is for performing the pressing step in the masking member fixing method according to the present invention. As shown in FIG. 5, the pressing means 60 includes a pressing portion 62 that presses the masking member 20 disposed in the cylindrical portion 30 toward the inner peripheral surface of the cylindrical portion 30, and the pressing portion 62 has a cylindrical shape. And a pressing portion moving mechanism 64 for moving the portion 30 in the axial direction.

  The pressing portion 62 is inserted into the cylindrical portion 30 in a state where the outer diameter is reduced, and after being arranged at a predetermined position, the masking member 20 is placed on the inner peripheral surface of the cylindrical portion 30 by enlarging the outer diameter. It is comprised so that it may press toward. Further, the pressing portion 62 is configured to have a smaller diameter than the inner diameter of the fixing member 5 when the diameter is reduced so that the pressing portion 62 can be retracted from the cylindrical portion 30 after the fixing by the fixing member 5 is completed.

  The structure for expanding and reducing the outer diameter of the pressing portion 62 is not particularly limited, and various known structures can be employed. For example, the pressing portion 62 may be expanded or contracted by a moving member that is moved by an air cylinder or the like, or may be expanded or contracted as the cam is rotated or the tapered member is moved. The outer diameter may be increased by expanding the bag-like member by introducing an appropriate fluid, and the outer diameter may be reduced by contracting the bag-like member by discharging the fluid. Also good.

  The pressing portion moving mechanism 64 moves the pressing portion 62 in the axial direction of the cylindrical portion 30 to place the pressing portion 62 at a predetermined position in the cylindrical portion 30 and presses the masking member 20 after the fixing is completed. The part 62 is configured to be retracted from the cylindrical part 30. The structure of the pressing portion moving mechanism 64 is not particularly limited, and various known structures such as an appropriate air cylinder and a ball screw transmission mechanism can be employed.

  In the example shown in FIG. 5, the pressing portion moving mechanism 64 is configured to linearly reciprocate the pressing portion 62 in the axial direction of the cylindrical portion 30. Although the arrangement of the portion 62 is realized, the pressing portion moving mechanism 64 may be configured to cause the pressing portion 62 to perform other movements (for example, rotational movement) according to the shape and arrangement of the workpiece. Good.

  The fixing member arrangement means 70 is for performing a fixing step in the masking member fixing method according to the present invention. As shown in FIG. 5, the fixing member arranging means 70 includes a holding portion 72 that holds the fixing member 5, an expansion / contraction portion 74 that expands / contracts the outer diameter of the fixing member 5, and the holding portion 72 that is the axis of the cylindrical portion 30. And a holding unit moving mechanism 76 that moves in the direction.

  The holding portion 72 is configured to appropriately hold the fixing member 5 during movement and to release the holding after the fixing member 5 is disposed at a predetermined position in the cylindrical portion 30. The structure of the holding part 72 is not specifically limited, For example, the holding structure by various known methods, such as holding and adsorption | suction, is employable.

  The expansion / contraction portion 74 reduces the outer diameter of the fixing member 5 when the fixing member 5 is inserted into the cylindrical portion 30, and the fixing member 5 is disposed after the fixing member 5 is disposed at a predetermined position in the cylindrical portion 30. It is comprised so that the outer diameter of may be expanded. The structure of the expansion / contraction part 74 is not specifically limited, What is necessary is just to employ | adopt the appropriate structure according to the expansion / contraction structure of the fixing member 5. FIG. Further, the expansion / contraction part 74 may also be used as the holding part 72. For example, the outer diameter of the fixing member 5 is reduced by the gripping force for gripping the fixing member 5, and the outer diameter of the fixing member 5 is increased and the holding of the fixing member 5 is released by releasing the gripping force. Alternatively, the enlargement / reduction unit 74 may be configured.

  The holding part moving mechanism 76 moves the holding part 72 in the axial direction of the cylindrical part 30 to place the fixing member 5 held by the holding part 72 at a predetermined position in the cylindrical part 30 and to fix it. The holding part 72 released from the holding of the member 5 is configured to be retracted from the cylindrical part 30. The structure of the holding unit moving mechanism 76 is not particularly limited, and various known structures such as an appropriate air cylinder and a ball screw transmission mechanism can be employed.

  In the example shown in FIG. 5, the holding part moving mechanism 76 is configured to linearly reciprocate the holding part 72 in the axial direction of the cylindrical part 30, thereby providing a simple configuration and a quick and reliable fixing member 5. The holding unit moving mechanism 76 may be configured to cause the holding unit 72 to perform other movements (for example, rotational movement) depending on the shape and arrangement of the workpiece to be processed.

  Next, a procedure for fixing the masking member by the masking member fixing device 1 will be described. When the masking member is fixed by the masking member fixing device 1, first, the masking member 20 rolled into a cylindrical shape is inserted into the cylindrical portion 30 and arranged along the inner peripheral surface of the cylindrical portion 30 (arrangement step). ). This arrangement step may be performed manually or by using a dedicated device.

  Next, a workpiece such as a cylinder liner 40 in which the masking member 20 is disposed is placed on the support base 10. The processing work may be placed by human power, or a transport device such as a robot arm may be used. Once the workpiece is placed on the support base 10, the end fixing member 8 is then placed at a predetermined position in the cylindrical portion 30. At this time, if both ends in the circumferential direction of the cylindrical portion 30 of the masking member 20 are positioned on the lower side, the end fixing member 8 only needs to be placed on the both ends. Further, the end fixing member 8 may be temporarily fixed with an adhesive tape or the like. The arrangement of the end fixing member 8 may be performed manually, or the end fixing member arranging means for arranging the end fixing member 8 at a predetermined position in the cylindrical portion 30 is provided in the masking member fixing apparatus 1. You may make it provide.

  If the end fixing member 8 is disposed, the pressing portion moving mechanism 64 of the pressing means 60 then arranges the pressing portion 62 at a predetermined position, that is, near the center of the cylindrical portion 30 of the masking member 20 in the axial direction. . Then, when the pressing portion 62 enlarges the outer diameter, the masking member 20 is pressed against the inner peripheral surface of the cylindrical portion 30 and is held in close contact (pressing step).

  Next, the holding part moving mechanism 76 of the fixing member arranging means 70 moves the holding part 72 to arrange the fixing member 5 at a predetermined position in the cylindrical part 30. The fixing member 5 is held by the holding portion 72 in a state where the outer diameter is reduced in advance. If the fixing member 5 is disposed at a predetermined position, the expansion / contraction part 74 increases the outer diameter of the fixing member 5, and the holding part 72 releases the holding of the fixing member 5. As a result, the fixing member 5 presses the masking member 20 toward the inner peripheral surface of the cylindrical portion 30, whereby the masking member 20 is fixed to the inner peripheral surface of the cylindrical portion 30 (fixing step). At substantially the same time, the fixing member 5 presses the end fixing member 8 toward the masking member 20, so that both ends of the cylindrical portion 30 of the masking member 20 in the circumferential direction are fixed. (End fixing step).

  Next, when the holding unit 72 releases the holding of the fixing member 5, the holding unit moving mechanism 76 of the fixing member arranging unit 70 retracts the holding unit 72 from the cylindrical portion 30. At substantially the same time, the pressing portion 62 of the pressing means 60 reduces the outer diameter to release the pressing state, and the pressing portion moving mechanism 64 retracts the reduced diameter pressing portion 62 from the cylindrical portion 30. As a result, the workpiece such as the cylinder liner 40 can be carried out from the support base 10.

  With the above procedure, the masking member fixing by the masking member fixing device 1 is completed. According to the masking member fixing device 1, in a state where the masking member 20 is securely pressed and brought into close contact with the inner peripheral surface of the cylindrical portion 30 at an appropriate position, the masking member 20 can be reliably fixed by the fixing member 5 quickly. Can be done. That is, it is possible to easily and reliably achieve the adhesion between the masking member 20 and the inner peripheral surface of the cylindrical portion 30.

  In the example shown in FIG. 5, the axial direction of the cylindrical portion 30 is the horizontal direction, but the axial direction of the cylindrical portion 30 may be other directions. Further, the pressing means 60 and the fixing member arranging means 70 may be configured integrally. That is, two holding parts 72 may be provided before and after the pressing part 62 so that the pressing part 62 and the holding part 72 move together, and the arrangement of the pressing part 62 and the arrangement of the fixing member 5 may be performed simultaneously.

  Further, the arrangement and fixing of the end fixing member 8 in the cylindrical portion 30 may be performed after the fixing by the fixing member 5 is completed depending on the structure of the end fixing member 8 and the fixing member 5. That is, the end fixing step may be performed after the fixing step. When the end fixing member 8 is fixed by a dedicated member, the masking member fixing device 1 may be provided with an arrangement means for arranging the member at a predetermined position in the cylindrical portion 30. . In addition, when it is not necessary to fix both ends of the cylindrical portion 30 of the masking member 20 in the axial direction, it goes without saying that the arrangement of the end fixing member 8 and the end fixing step may be omitted. Absent.

  As mentioned above, although embodiment of this invention was described, the masking member fixing method and masking member fixing apparatus of this invention are not limited to above-described embodiment, In the range which does not deviate from the summary of this invention. Of course, various changes can be made.

  In addition, the operations and effects shown in the above embodiment are merely a list of the most preferable operations and effects resulting from the present invention, and the operations and effects of the present invention are not limited to these.

  According to the masking member fixing method and the masking member fixing device according to the present invention, when the masking member is fixed to the workpiece, the masking member is quickly and accurately fixed to the workpiece regardless of the skill level of the operator. I can do it. Therefore, the masking member fixing method and the masking member fixing device according to the present invention can be suitably used in an operation that needs to fix the masking member to the inner peripheral surface of the cylindrical portion such as blasting or painting.

DESCRIPTION OF SYMBOLS 1 Masking member fixing device 5 Fixing member 8 End part fixing member 10 Support stand 20 Masking member 30 Cylindrical part 60 Pressing means 62 Pressing part 64 Pressing part moving mechanism 70 Fixing member arrangement means 72 Holding part 74 Expansion / contraction part 76 Holding part moving mechanism

Claims (8)

A masking member fixing method for fixing a sheet-like masking member to an inner peripheral surface of a cylindrical portion,
An arrangement step of arranging the masking member along the inner peripheral surface;
A pressing step of holding the vicinity of the center in the axial direction of the cylindrical portion of the masking member arranged along the inner peripheral surface in a state pressed against the inner peripheral surface;
A fixing step of fixing the masking member to the inner peripheral surface in a state in which the vicinity of the center of the masking member is pressed against the inner peripheral surface.
Masking member fixing method. In the fixing step, the masking member is fixed to the inner peripheral surface by pressing the masking member from the inside with a ring-shaped or C-shaped fixing member whose outer diameter can be expanded and contracted,
The masking member fixing method according to claim 1. It has an end fixing step of pressing and fixing both end portions in the circumferential direction of the cylindrical portion of the masking member arranged along the inner peripheral surface by an end fixing member.
The masking member fixing method according to claim 1 or 2. In the end fixing step, the gap between both ends in the circumferential direction of the cylindrical portion of the masking member arranged along the inner peripheral surface is covered with the end fixing member.
The masking member fixing method according to claim 3. A masking member fixing device for fixing a sheet-like masking member to an inner peripheral surface of a cylindrical portion,
A pressing means for holding the masking member in a state pressed against the inner peripheral surface;
Fixing member arranging means for arranging a fixing member for fixing the masking member on the inner peripheral surface at a predetermined position in the cylindrical portion,
Masking member fixing device. The pressing means is
A pressing portion for pressing the masking member toward the inner peripheral surface;
A pressing portion moving mechanism for moving the pressing portion in the axial direction of the cylindrical portion,
The masking member fixing device according to claim 5. The fixing member is configured in a ring shape or a C shape whose outer diameter can be expanded and contracted,
The masking member fixing device according to claim 5 or 6. The fixing member arranging means is
A holding portion for holding the fixing member;
An expansion / contraction portion for expanding / contracting the outer diameter of the fixing member;
A holding part moving mechanism for moving the holding part in the axial direction of the cylindrical part,
The masking member fixing device according to claim 7.

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