Disassembling tool of liquid gasket adhesion part and disassembling method of liquid gasket adhesion part using the same

Abstract

To easily and surely disassemble two members by cutting a liquid gasket adhesion part interposed between mating face of the two members in a short time and at favorable workability.SOLUTION: A disassembling tool 1 includes a wedge member 10 engaged with mating faces of two members (flanges 30, 40), and push-spreading the mating faces, a saw cutter 13 rotatably accommodated in the wedge member 10, and pressing means (screw shaft members) 9, 12 for independently pushing the wedge member 10 and the saw cutter 13 to a liquid gasket adhesion part 20 side. Also, the disassembling tool 1 is attached to the two members 30, 40, the mating faces of the two members 30, 40 are spread by pushing the wedge member 10 by the pressing means 9 in a state that the wedge member 10 of the disassembling tool 1 is engaged with escape grooves 50 formed at outer end parts of the mating faces of the two members 30, 40, and the liquid gasket adhesion part 20 is cut by rotating the saw cutter 13 by the pressing means 12 while pressing the cutter to the liquid gasket adhesion part 20 while maintaining the spread state.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a disassembly tool for separating a liquid gasket adhesive portion present on the mating surfaces of two components to disassemble the two components, and a method for disassembling a liquid gasket adhesive portion using the same. [Background technology]

[0002] For example, a liquid gasket (FIPG (Foamed In Place Gasket)), which is a sealing material, is applied to the mating surfaces between the cylinder block and cylinder head of a vehicle engine, and the sealing performance of the mating surfaces between the cylinder block and the cylinder head is improved as the liquid gasket hardens.

[0003] In the above example, when replacing parts during maintenance of a vehicle engine, it is necessary to disassemble the assembled cylinder block and cylinder head. However, the mating surfaces of the cylinder block and cylinder head are bonded with a liquid gasket, which makes it difficult to disassemble the two.

[0004] Conventionally, the method for disassembling two parts whose mating surfaces are bonded with a liquid gasket has been to insert a tool such as a flat-head screwdriver or crowbar between the mating surfaces of the two parts and use the tool to pry apart the mating surfaces to disassemble the two parts.

[0005] However, when the two components are disassembled by the above method, the mating surfaces (sealing surfaces) of the two components are easily damaged by the tool, and such damage can lead to a decrease in the sealing performance of the mating surfaces (sealing surfaces) of the two components.

[0006] Therefore, for example, Patent Document 1 proposes a mating surface separation device in which an internal thread is added to a fastening bolt through hole of an equipment casing having a mating surface, and a press bolt is screwed into this internal thread to jack up the equipment casing.

[0007] Patent Document 2 also proposes a power conversion device in which a female threaded portion is inserted into the second flange portion of a case formed by combining a first case body having a first flange portion and a second case body having a second flange portion, and a recess having a bolt abutment surface is formed in the first flange portion, and the first and second case bodies are disassembled by screwing a disassembly bolt into the female threaded portion of the second flange portion and abutting its end face against the bolt abutment surface formed in the recess of the first flange portion and jacking up the device.

[0008] Furthermore, Patent Document 3 proposes a method in which, when dismantling the assembled joints of equipment, a release agent is applied to soften the coating film of the liquid gasket packing that remains attached in a solidified state to the joint surfaces of the equipment, and the release agent is allowed to penetrate the coating film, softening and plasticizing the coating film, thereby peeling it off from the joint surfaces. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Publication No. 64-016380 [Patent Document 2] JP 2013-126297 A [Patent Document 3] JP 2011-121035 A Summary of the Invention [Problem to be solved by the invention]

[0010] However, when separating the equipment casing using the mating surface separation device proposed in Patent Document 1, it is necessary to additionally process internal threads into the fastening bolt through-holes of the equipment casing, which increases the number of processing steps and raises the processing costs. In addition, it requires a special push bolt to be screwed into the internal thread, which makes the work complicated.

[0011] Furthermore, when disassembling the first case body and the second case body of the power conversion device proposed in Patent Document 2, it is necessary to insert a female screw portion into the second flange portion and form a recess in the first flange portion, which increases the number of processing steps and increases the processing costs, and also poses the same problem of the complication of work as in Patent Document 1, in that a special disassembly bolt is required to screw into the female screw portion.

[0012] Furthermore, in the method described in Patent Document 3, a softening release agent is applied to a liquid gasket, and it takes a long time for this release agent to penetrate into the coating film and soften and plasticize the coating film, resulting in a problem of poor efficiency in the decomposition process.

[0013] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a tool for disassembling liquid gasket adhesive joints, which can easily and reliably disassemble the two components by cutting the liquid gasket interposed between the mating surfaces of two components in a short period of time with good workability without requiring any processing for disassembly, and a method for disassembling liquid gasket adhesive joints using the same. [Means for solving the problem]

[0014] In order to achieve the above object, the disassembly tool for a liquid gasket adhesive portion according to claim 1 comprises: The tool is for separating a liquid gasket adhesive portion present between two mating surfaces of two components to disassemble the two components, and is characterized in that it comprises a wedge member that engages with the mating surfaces of the two components to push the mating surfaces apart, a saw cutter that is rotatably housed inside the wedge member, and a pressing means that independently presses the wedge member and the saw cutter toward the liquid gasket adhesive portion.

[0015] Furthermore, the method for disassembling a liquid gasket adhesive portion of the present invention is a method for disassembling a liquid gasket adhesive portion of two components using the above-mentioned disassembly tool, characterized in that the disassembly tool is attached to the two components, the wedge members of the disassembly tool are engaged with escape grooves formed at the outer ends of the mating surfaces of the two components, the wedge members are pressed by the pressing means to spread the mating surfaces of the two components, and while maintaining this state, the saw cutter is rotated while being pressed against the liquid gasket adhesive portion by the pressing means, thereby cutting the liquid gasket.

[0016] According to the method for disassembling a liquid gasket using the disassembly tool configured as described above, the liquid gasket present between the mating surfaces of two components can be cut with good workability and in a short time by rotating a saw cutter while the two components are spread apart by a wedge member, so that the two components can be disassembled easily and reliably. Furthermore, since there is no need to perform additional processing on the two components when disassembling the two components, the processing costs for the two components can be kept low. Effect of the Invention

[0017] According to the present invention, it is possible to obtain the effect that the liquid gasket present on the mating surfaces of two components can be cut with good workability in a short time without requiring any processing for disassembly, thereby enabling the two components to be disassembled simply and reliably. [Brief description of the drawings]

[0018] [Figure 1] FIG. 2 is a perspective view of a disassembly tool according to the present invention. [Diagram 2] FIG. 4 is a front view of a wedge member of the disassembly tool according to the present invention. [Diagram 3] 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 2 is a partial front sectional view showing a method for disassembling a liquid gasket adhesive portion according to the present invention (with a disassembly tool attached). [Diagram 5] 5 is a cross-sectional view taken along line BB in FIG. 4. [Figure 6]6 is a cross-sectional view taken along line CC in FIG. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0020] [Configuration of disassembly tools] First, the configuration of a disassembly tool 1 according to the present invention will be described below with reference to Figs. 1 to 3.

[0021] Fig. 1 is a perspective view of a disassembly tool according to the present invention, Fig. 2 is a front view of a wedge member of the disassembly tool, and Fig. 3 is a cross-sectional view taken along line AA in Fig. 2. Disassembly tool 1 according to the present invention is a tool for disassembling two components by cutting a part of a liquid gasket adhesive portion present on the mating surfaces of the two components, and is configured as follows: In the following description, the directions of the arrows shown in Fig. 1 are defined as the "front-rear", "left-right" and "up-down" directions, respectively.

[0022] As shown in Fig. 1, the disassembly tool 1 according to the present invention includes a pair of front and rear rectangular plate-shaped support brackets 2 arranged vertically on the left side, and a pair of front and rear rectangular plate-shaped support brackets 3 arranged vertically on the right side. Here, circular holes 2a, 3a for inserting the pair of front and rear bolts 4 are provided in the left-right direction at the lower end of each of the pair of front and rear support brackets 2 arranged on the left side and at the lower end of each of the pair of front and rear support brackets 3 arranged on the right side. Note that a nut 5 is screwed onto the end of each bolt 4, as described later.

[0023] A guide bar 6 having a rectangular cross section along the front-rear direction is horizontally installed between the upper ends of the pair of front and rear support brackets 2 arranged on the left side. Similarly, a guide bar 7 having a rectangular cross section along the front-rear direction is horizontally installed between the upper ends of the pair of front and rear support brackets 3 arranged on the right side, and both guide bars 6, 7 are arranged horizontally in the front-rear direction in parallel to each other. The left and right ends of a slider 8 in the form of a rectangular block that is long in the left-right direction are engaged with these guide bars 6, 7, and this slider 8 can slide in the front-rear direction along the left and right guide bars 6, 7.

[0024] A screw shaft member 9 is screwed vertically through the longitudinal (left-right) center of the slider 8, and the lower end of this screw shaft member 9 abuts against the upper surface of a wedge member 10. This screw shaft member 9 constitutes a pressing means for pressing the wedge member 10 downward, and a handle 11 for manually rotating the screw shaft member 9 about its axis is attached to its upper end. Here, the handle 11 is composed of a fixed member 11A attached to the upper end of the screw shaft member 9, and a round rod-shaped handle bar 11B having one longitudinal end inserted into the fixed member 11A and extending horizontally from the fixed member 11A.

[0025] A threaded shaft member 12 is threadedly inserted vertically into a portion of the slider 8 close to the portion where the threaded shaft member 9 is threadedly inserted (a portion to the right of the threaded shaft member 9), and this threaded shaft member 12 passes through a circular hole 10a (see Figs. 2 and 3) that is provided vertically through the wedge member 10 and extends vertically below the wedge member 10. The lower end of this threaded shaft member 12 abuts against a rotating shaft 14 that is attached to the center of a circular saw cutter 13 shown by a chain line in Fig. 3.

[0026] The screw shaft member 12 constitutes a pressing means for pressing the saw cutter 13 downward via the rotating shaft 14, and a handle 15 for manually rotating the screw shaft member 12 around its axis is attached to its upper end. Here, the handle 15 is composed of a fixed member 15A attached to the upper end of the screw shaft member 12, and a round rod-shaped handle bar 15B whose one end in the longitudinal direction is inserted into the fixed member 15A and extends horizontally from the fixed member 15A. A circular hole 15a (see FIG. 4) is formed horizontally through the fixed member 15A, and the handle bar 15B can be freely inserted and removed from the circular hole 15a. In other words, the handle bar 15B can be freely attached / detached to / from the fixed member 15A.

[0027] Next, the structure of the wedge member 10 will be described with reference to FIGS.

[0028] The wedge member 10 is a triangular prism member with an inverted triangular cross section (see FIG. 3) that narrows downward, and has a rectangular opening 10A formed on one side (the right side). As shown by the chain line in FIG. 3, a circular saw cutter 13 is housed inside the wedge member 10, and the wedge member 10 has a cutter housing portion 10B in the form of a slit groove for positioning and holding the saw cutter. As shown by the chain line in FIG. 3, a rotating shaft 14 attached to the center of the saw cutter 13 passes through the opening 10A of the wedge member 10 and extends horizontally, and a handle 16 bent like a crank is attached to one end of the rotating shaft.

[0029] [How to disassemble the liquid gasket adhesive part] Next, a method for disassembling the liquid gasket adhesive portion 20 using the disassembly tool 1 configured as above will be described with reference to Figs.

[0030] 4 is a partial front sectional view showing a method for disassembling a liquid gasket adhesive portion according to the present invention, FIG. 5 is a sectional view taken along line BB in FIG. 4, and FIG. 6 is a sectional view taken along line CC in FIG.

[0031] Here, the cylinder block and cylinder head of an internal combustion engine are taken as an example of two members fastened to each other, but the present invention is of course similarly applicable to disassembly of parts other than the cylinder block and cylinder head, or two fastened parts of any device other than an internal combustion engine.

[0032] As shown in FIG. 4, flanges 30, 40 are formed integrally at the fastening portions of the cylinder block and cylinder head, which are fastened to each other by a number of bolts (not shown). A liquid gasket adhesive portion 20 is interposed between the mating surfaces of these flanges 30, 40. This liquid gasket adhesive portion 20 ensures high sealing performance at the joining surfaces of the flanges 30, 40 of the cylinder head and cylinder block.

[0033] Then, when it becomes necessary to disassemble the cylinder block and the cylinder head for part replacement, for example, the disassembly tool 1 according to the present invention is attached to both flanges 30, 40 as shown in Fig. 4. Specifically, the pair of front and rear support brackets 2 on the left side and the pair of front and rear support brackets 3 on the right side are fitted to the outer ends of both flanges 30, 40 so as to sandwich these flanges 30, 40 from both the left and right sides. Here, the width B1 between the left and right support brackets 2, 3 of the disassembly tool 1 is set to be slightly larger than the width B2 of both flanges 30, 40 (B1>B2), and a minute gap δ (=B1-B2) is formed between both support brackets 2, 3 and both flanges 30, 40.

[0034] In the above state, the disassembly tool 1 is attached to both flanges 30, 40 by utilizing two adjacent bolt holes (not shown) formed in both flanges 30, 40. Specifically, as shown in FIG. 4, two bolts 4 (only one bolt is shown in FIG. 4) are passed through circular holes 3a formed in the lower ends of the pair of front and rear support brackets 3, bolt holes (not shown) formed in the flanges 30, 40, and circular holes 3a formed in the lower ends of the pair of front and rear support brackets 2, and nuts 5 screwed onto each bolt 4 are tightened to attach the disassembly tool to the outer ends of both flanges 30, 40 as shown in FIGS. 4 to 6. The center distance L between the circular holes 2a, 3a of the left and right support brackets 2, 3 of the disassembly tool 1 is set to be equal to the pitch of two adjacent bolt holes (not shown) formed in both flanges 30, 40 (L=P).

[0035] Incidentally, before the flanges 30, 40 are fastened together, no liquid packing is applied to the outer ends of the mating surfaces of the flanges 30, 40, and the liquid packing is applied only to the portions excluding the outer ends. Therefore, a recessed escape groove 50 is formed between the outer ends of the flanges 30, 40 along the longitudinal direction (the left-right direction in FIG. 5) as shown in FIG. 4 to FIG. 6.

[0036] As shown in Figs. 4 to 6, when the disassembly tool 1 is attached to both flanges 30, 40, the tip of the wedge member 10 and the blade of the saw cutter 13 are in contact with the end face of the liquid gasket adhesive portion 20 between both flanges 30, 40. When the handle 11 is turned from this state to rotate the screw shaft member 9 about its axis, the screw shaft member 9 moves downward and pushes down the wedge member 10. When the screw shaft member 9 is rotated, both side surfaces of the wedge member 10 engage with the opening edges of the clearance grooves 50 formed in the outer ends of both flanges 30, 40, and the outer ends of both flanges 30, 40 are pushed apart so that the openings of the clearance grooves 50 open. In this case, the maximum amount by which the outer ends of both flanges 30, 40 are pushed apart is limited to the gap δ (see Fig. 4).

[0037] Next, while maintaining the outer ends of both flanges 30, 40 pushed apart by wedge member 10 as described above, handle 15 is manually turned to rotate threaded shaft member 12 about its axis, while handle 16 is manually turned to rotate saw cutter 13. Then, threaded shaft member 12 moves downward independently of the other threaded shaft member 9 and presses downward against rotating shaft 14 of saw cutter 13, so that saw cutter 13 rotates while biting into liquid gasket adhesive portion 20, cutting liquid gasket adhesive portion 20. If handle bar 15B of handle 15 interferes with threaded shaft member 9 when handle 15 is turned and handle bar 15B cannot be turned, handle bar 15B can be removed from fixed member 15A and inserted in the opposite direction into circular hole 15a (see FIG. 4) of fixed member 15A, and handle bar 15B can be continued to be operated to turn handle 15.

[0038] Then, when the above work is completed, the handles 11, 15 are rotated in the reverse direction, respectively, to separate the wedge member 10 and the saw cutter 13 from the liquid gasket adhered portion 20. Then, from this state, the slider 8 together with the wedge member 10 and the saw cutter 13 is moved in the front-to-rear direction (the left-to-right direction in FIG. 5) along the guide rails 6, 7, and the series of operations described above is performed to cut the next portion of the liquid gasket adhered portion 20 with the saw cutter 13.

[0039] When the above operation is performed within the slidable range of the slider (stroke S shown in FIG. 5), that is, when cutting of the liquid gasket adhesive portion 20 is completed within the pitch range of two adjacent bolt holes formed in both flanges 30, 40, disassembly tool 1 is removed from both flanges 30, 40 and disassembly tool 1 is attached to another position of both flanges 30, 40 using the next two adjacent bolt holes (not shown), and the above-described operation is repeated. When cutting of the liquid gasket adhesive portion 20 between the mating surfaces of both flanges 20, 30 is performed over the entire circumference of its outer end by such operation, the adhesive strength of the liquid gasket adhesive portion 20 is weakened, so that the cylinder block and the cylinder head can be easily disassembled with little force.

[0040] As is clear from the above description, according to the method of disassembling liquid gasket adhesive portion 20 of this embodiment using the disassembly tool 1 of this embodiment, the liquid gasket adhesive portion 20 present on the mating surface between the cylinder block and the cylinder head can be cut efficiently and in a short time by rotating the saw cutter 13 while both flanges 30, 40 are pushed apart by the wedge member 10, so that the cylinder block and the cylinder head can be disassembled easily and reliably. Furthermore, when disassembling the cylinder head and the cylinder block, no additional processing is required for the cylinder block and the cylinder head, so the processing costs for the cylinder block and the cylinder head can be kept low.

[0041] Although the above has been described using the cylinder block and cylinder head of an internal combustion engine as an example of two components fastened to each other, the present invention is similarly applicable to the disassembly of any parts other than the cylinder block and cylinder head, such as a cylinder head and a cylinder head cover, or a chain case for a cylinder block, or to the disassembly of two fastened parts of any device other than an internal combustion engine.

[0042] Furthermore, the present invention is not limited to the application of the embodiments described above, and various modifications are possible within the scope of the claims and the technical ideas described in the specification and drawings. [Explanation of symbols]

[0043] 1 Disassembly tools 2,3 Support bracket 4 Volts 5 Nut 6,7 Guide bar 8 Slider 9 Screw shaft member (pressing means) 10 Wedge member 10A Wedge member opening 10B Cutter accommodating portion of wedge member 11 Handle 11A Handle fixing member 11B Handlebar 12 Screw shaft member (pressing means) 13 Saw cutter 14 Rotational Axis 15 Handle 15A Handle fixing member 15B Handlebar 15a Circular hole in fixing member 16 Handle 20 Liquid gasket adhesive 30,40 flange 50 Undercut B1 Width between left and right support brackets B2 flange width L Center distance between the circular holes in the support bracket δ Gap

Claims

1. A disassembling tool for separating two members adhered with a liquid gasket interposed therebetween by separating the liquid gasket adhering portion of the two members, a wedge member that is pushed into a gap between end faces of the two members where the liquid gasket is interposed by a pushing means, a rotary saw cutter that is housed and installed inside the wedge member and is installed so as to be movable separately from the wedge member in the direction of the liquid gasket adhering portion of the two members that are pushed and expanded when the wedge member is pushed, A disassembling tool for a liquid gasket adhering portion, comprising:

2. The pushing means is a pair of support brackets respectively attached to both outer sides of the two adhered members, a guide rail installed between the pair of support brackets, a slider spanned between the guide rails and slidably movable along the guide rails, and a first screw shaft member that is screwed and inserted into the slider and moves forward and backward with respect to the end faces of the two members by a rotational operation. The disassembling tool for a liquid gasket adhering portion according to claim 1, wherein the wedge member is pushed by a forward movement of the first screw shaft member of the pushing means to perform a pushing operation.

3. a second screw shaft member that is screwed and inserted into the slider and moves forward and backward with respect to the end faces of the two members by a rotational operation, a through hole provided in the wedge member and allowing the second screw shaft member to pass therethrough in a non-screwed state, The disassembling tool for a liquid gasket adhering portion according to claim 2, comprising: wherein the movement of the rotary saw cutter in the direction of the liquid gasket adhering portion is performed by pushing the rotary shaft of the rotary saw cutter by a forward movement of the second screw shaft member.

4. A method for disassembling a liquid gasket adhering portion of two members using the disassembling tool according to claim 3, an attaching step of attaching the pair of support brackets of the disassembling tool to both outer sides of the two members, a spreading step of pushing the wedge member into a gap between end faces of the two members where the liquid gasket is interposed by a forward movement of the first screw shaft member of the pushing means to spread the two members, a cutting step of cutting the liquid gasket adhering portion by pushing down and rotating the rotary saw cutter by a forward movement of the second screw shaft member while maintaining this state. A method for disassembling a liquid gasket adhering portion, comprising:

5. The cutting step of the liquid gasket adhering portion is The method for disassembling a liquid gasket bonding portion according to claim 4, characterized in that the wedge member, the rotary saw cutter, and the slider are integrally moved by sliding them along the guide rail to change the cutting position of the liquid gasket bonding portion.

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