conjugate

Abstract

Provided is a joint that is less likely to deform due to the joint of a main body and a front end. A joint (10) includes a main body (100), a front end (200), and a joint portion (300). The main body (100) supports the front end (200). The front end (200) acts on an object. The joint portion (300) joins the main body (100) and the front end (200). The joint portion (300) includes a fitting portion (310), an insertion structure (320), and a restriction structure (330). The fitting portion (310) includes a main body fitting portion (120) and a front end fitting portion (220). The insertion structure (320) is configured to fit the main body fitting portion (120) and the front end fitting portion (220) by relative movement of the main body (100) and the front end (200) in a height direction. The restriction structure (330) is configured to restrict relative movement of the main body (100) and the front end (200) in a cross direction in a fitted state.

Description

Technical Field

[0001] The present invention relates to a joint for joining a main body portion to a front end portion. Background Technology

[0002] Examples of joints include jigs and measuring instruments. A joint may include, for example, a main body, a front end, and a joining portion. The main body supports the front end. The front end acts on an object. The joining portion engages the main body with the front end. Patent Document 1 illustrates an example of a conventional joint.

[0003] Patent Document 1: Japanese Utility Model Publication No. 63-124455

[0004] When the main body and the front end are joined by a joint, it is preferable that the shape of the joint is minimally affected. Summary of the Invention

[0005] The connector according to the present invention comprises: a front end portion acting on an object; a main body portion supporting the front end portion; and a joining portion joining the main body portion to the front end portion, the joining portion including a fitting portion comprising: a main fitting portion disposed on the main body portion and a front fitting portion disposed on the front end portion; an insertion structure configured to fit the main fitting portion to the front fitting portion by relative movement of the main body portion and the front end portion in the height direction; and a limiting structure configured to limit relative movement of the main body portion and the front end portion in an intersecting direction intersecting the height direction when the main fitting portion and the front fitting portion are fitted together.

[0006] According to the above-described joint, the main body and the front end are joined by a fitting portion. Therefore, compared to cases where the main body and the front end are joined by, for example, metallurgical joining, deformation of the joint due to heat is less likely to occur. This, for example, helps the front end to function well on the object.

[0007] In the above-mentioned joint, the direction of relative movement when the front end is fitted into the main body is defined by the insertion structure, thereby improving the workability related to the joint between the main body and the front end.

[0008] In the above-mentioned joint, the relative movement of the main body and the front end in the intersecting direction is restricted by the limiting structure when the main body fitting part and the front end fitting part are fitted together. Therefore, the position of the front end relative to the main body is stable in the fitted state.

[0009] In one example of the aforementioned joint, the main body fitting portion includes a first main body undulation portion and a second main body undulation portion; the front end fitting portion includes a first front end undulation portion corresponding to the first main body undulation portion and a second front end undulation portion corresponding to the second main body undulation portion; the limiting structure includes a first limiting fitting portion and a second limiting fitting portion; the crossing direction includes a first crossing direction and a second crossing direction; the second crossing direction is the opposite direction to the first crossing direction; the first limiting fitting portion includes the first main body undulation portion and the first front end undulation portion configured to limit the relative movement of the main body portion and the front end portion in the first crossing direction; and the second limiting fitting portion includes the second main body undulation portion and the second front end undulation portion configured to limit the relative movement of the main body portion and the front end portion in the second crossing direction.

[0010] In the aforementioned joint, the relative movement between the main body and the front end is appropriately restricted.

[0011] In one example of the aforementioned joint, the first main body undulation portion includes a concave portion or a convex portion, and the first front end undulation portion includes a convex portion or a concave portion.

[0012] In the above-mentioned joint, the first main body undulation and the first front end undulation can be easily formed.

[0013] In one example of the aforementioned joint, the recess or protrusion of the first main body undulation includes a side surface, the side surface of the recess or protrusion of the first main body undulation includes an inclined surface, the protrusion or recess of the first front end undulation includes a side surface, and the side surface of the protrusion or recess of the first front end undulation includes an inclined surface.

[0014] In the aforementioned joint, the relative movement between the main body and the front end is appropriately restricted by the relationship between the inclined surface of the side of the first main body undulation portion and the inclined surface of the side of the first front end undulation portion.

[0015] In one example of the aforementioned joint, the first main body undulation includes a recess, the recess of the first main body undulation includes a bottom surface, the bottom surface of the recess of the first main body undulation includes an inclined surface, the first front end undulation includes a convex portion, the convex portion of the first front end undulation includes a top surface, and the top surface of the convex portion of the first front end undulation includes an inclined surface.

[0016] In the aforementioned joint, the relative movement between the main body and the front end is appropriately restricted by the relationship between the inclined surface of the bottom surface of the first main body undulating portion and the inclined surface of the top surface of the first front end undulating portion.

[0017] In one example of the aforementioned joint, the first main body undulation includes a protrusion, the protrusion of the first main body undulation includes a top surface, the top surface of the protrusion of the first main body undulation includes an inclined surface, the first front end undulation includes a concave portion, the concave portion of the first front end undulation includes a bottom surface, and the bottom surface of the concave portion of the first front end undulation includes an inclined surface.

[0018] In the aforementioned joint, the relative movement between the main body and the front end is appropriately restricted by the relationship between the inclined surface of the top surface of the first main body undulation portion and the inclined surface of the bottom surface of the first front end undulation portion.

[0019] In one example of the aforementioned joint, the second main body undulation portion includes a concave portion or a convex portion, and the second front end undulation portion includes a convex portion or a concave portion.

[0020] In the above-mentioned joint, a second main body undulation and a second front end undulation can be easily formed.

[0021] In one example of the aforementioned joint, the recess or protrusion of the second main body undulation includes a side surface, the side surface of the recess or protrusion of the second main body undulation includes an inclined surface, the protrusion or recess of the second front end undulation includes a side surface, and the side surface of the protrusion or recess of the second front end undulation includes an inclined surface.

[0022] In the above-mentioned joint, the relative movement between the main body and the front end is appropriately restricted by the relationship between the inclined surface of the side of the second main body undulation portion and the inclined surface of the side of the second front end undulation portion.

[0023] In one example of the aforementioned joint, the second main body undulation includes a recess, the recess of the second main body undulation includes a bottom surface, the bottom surface of the recess of the second main body undulation includes an inclined surface, the second front end undulation includes a convex portion, the convex portion of the second front end undulation includes a top surface, and the top surface of the convex portion of the second front end undulation includes an inclined surface.

[0024] In the aforementioned joint, the relative movement between the main body and the front end is appropriately restricted by the relationship between the inclined surface of the bottom surface of the second main body undulating part and the inclined surface of the top surface of the second front end undulating part.

[0025] In one example of the aforementioned joint, the second main body undulation includes a protrusion, the protrusion of the second main body undulation includes a top surface, the top surface of the protrusion of the second main body undulation includes an inclined surface, the second front end undulation includes a concave portion, the concave portion of the second front end undulation includes a bottom surface, and the bottom surface of the concave portion of the second front end undulation includes an inclined surface.

[0026] In the aforementioned joint, the relative movement between the main body and the front end is appropriately restricted by the relationship between the inclined surface of the top surface of the second main body undulating part and the inclined surface of the bottom surface of the second front end undulating part.

[0027] In one example of the aforementioned joint, the joint includes an adhesive portion that bonds the main body fitting portion to the front end fitting portion.

[0028] In the aforementioned joint, the relative movement between the main body and the front end is more strongly restricted.

[0029] Invention Effects

[0030] In the joints involved in this invention, deformation caused by the joining of the main body and the front end is less likely to occur. Attached Figure Description

[0031] Figure 1 This is a front view of the joint according to the first embodiment.

[0032] Figure 2 This is a cross-sectional view of the joint according to the second embodiment.

[0033] Figure 3 This is a cross-sectional view of the joint according to the third embodiment.

[0034] Figure 4 This is a front view of the joint according to the fourth embodiment.

[0035] Figure 5 This is a top view of the main body.

[0036] Figure 6 This is a bottom view of the front end.

[0037] Figure 7 This is a cross-sectional view of the joint.

[0038] Figure 8 This is a cross-sectional view of the joint according to the fifth embodiment.

[0039] Figure 9 This is a cross-sectional view of the joint according to the sixth embodiment.

[0040] Figure 10 This is a cross-sectional view of the joint in the seventh embodiment.

[0041] Figure 11 This is a front view of the joint according to the eighth embodiment.

[0042] Figure 12 It is a cross-sectional view of the joint including the first limiting fitting portion.

[0043] Figure 13 It is a cross-sectional view of the joint including the second limiting fitting portion.

[0044] Figure 14 This is a front view of the joint according to the ninth embodiment.

[0045] Figure 15 It is a cross-sectional view of the joint, including the joint portion.

[0046] Figure 16 This is a perspective view of the joint according to the tenth embodiment.

[0047] Figure 17 This is the front view of the joint.

[0048] Figure 18 This is a side view of the joint.

[0049] Figure 19 This is the front view of the main body.

[0050] Figure 20 This is the front view of the front end.

[0051] Figure 21 This is a top view of the main body.

[0052] Figure 22 This is a bottom view of the front end.

[0053] Explanation of reference numerals in the attached figures

[0054] 10...joint; 100...main body; 200...front end; 300...joint; 310...fitting part; 320...insertion structure; 330...restriction structure. Detailed Implementation

[0055] (First Implementation)

[0056] Figure 1 An example of the joint 10 is shown.

[0057] The joint 10 is configured to act on the object.

[0058] The form in which the compound 10 functions is illustrated.

[0059] In the first example, the joint 10 acts on the object while moving relative to the object.

[0060] In the second example, the joint 10 acts on the object without any relative movement relative to the object.

[0061] In the third example, the joint 10 includes the structure of the first example and the structure of the second example.

[0062] The function of the joint 10 includes the case where the joint 10 is in contact with the object and the case where the joint 10 is not in contact with the object.

[0063] An example is given of the relative movement of the composite 10 and the object.

[0064] In the first example, the joint 10 does not move. The object moves relative to the joint 10.

[0065] In the second example, the object does not move. The joint 10 moves relative to the object.

[0066] In the third example, the joint 10 moves relative to the object. The object moves relative to the joint 10.

[0067] The joint 10 is classified, for example, according to its function.

[0068] Examples of the classification of the connector 10 according to its function include clamping tools, fluid ejection parts, measuring instruments, and styluses.

[0069] Fixture tools are a general term for fixtures and tools.

[0070] A fixture supports or guides a workpiece or tool.

[0071] Tools process the workpiece.

[0072] The fluid ejected from the fluid ejector is the fluid that is the target object.

[0073] The measuring instrument measures the object being measured.

[0074] The pen writes on the object being written.

[0075] The usage of compound 10 is illustrated.

[0076] In the first example, the connector 10 is used while it is installed in the processing device.

[0077] Examples of processing devices include processing devices, fluid ejection devices, post-processing devices, assembly devices, inspection devices, and measuring devices.

[0078] Examples of the first type of assembly 10 include clamping tools, measuring instruments, and fluid ejection parts.

[0079] In the second example, the connector 10 is used without being fitted with a processing device or the like.

[0080] Examples of the second form of use of the connector 10 include measuring instruments and styluses.

[0081] Styluses are used, for example, for operating touch panel-type pointing devices.

[0082] The processing device processes the workpiece, which is the object of the processing.

[0083] Examples of processing based on processing equipment include: cutting, piercing, grinding, lapping, rolling, forging, bending, and stamping.

[0084] Examples of processing equipment include machine tools and stamping equipment.

[0085] Examples of machine tools include cutting processing devices, grinding processing devices, and special processing devices.

[0086] As an example of the assembly 10 that is inserted into the processing device, a jig tool can be cited.

[0087] Examples of fixtures for machining equipment include fixtures for cutting machining equipment, fixtures for grinding machining equipment, fixtures for special machining equipment, and fixtures for stamping machining equipment.

[0088] Examples of tools used in machining equipment include lathe tools for cutting machining equipment, scrapers for cutting machining equipment, cut-off tools for cutting machining equipment, punches for stamping equipment, and dies for stamping equipment.

[0089] A fluid ejection device ejects the fluid that is the target object.

[0090] Examples of fluid ejection devices include injection molding devices and cleaning devices.

[0091] As an example of the connector 10 into which the fluid ejection device is installed, a nozzle can be cited.

[0092] The post-processing unit processes the workpiece.

[0093] Examples of post-processing based on post-processing equipment include coating, masking, plating, printing, and drying.

[0094] Examples of post-processing equipment include coating equipment, masking equipment, plating equipment, printing equipment, and drying equipment.

[0095] As an example of a connector for a post-processing device, a clamp can be cited.

[0096] The inspection device inspects the object to be inspected.

[0097] Examples of inspections based on inspection devices include shape inspection, construction inspection, size inspection, color inspection, and appearance design inspection.

[0098] As an example of the fitting 10 into which the inspection device is installed, a clamp can be cited.

[0099] The measuring device measures the object to be measured.

[0100] Examples of measurements based on measuring devices include contour shape measurement, three-dimensional measurement, surface roughness measurement, surface shape measurement, X-ray CT (Computed Tomography) measurement, CNC (Computer Numerical Control) image measurement, and roundness measurement.

[0101] Examples of fittings 10 into which a measuring device is installed include clamps and measuring instruments.

[0102] Examples of measuring instruments include spherical measuring instruments and styluses.

[0103] The joint 10 is specified, for example, in a first lateral direction, a second lateral direction, a first longitudinal direction, a second longitudinal direction, a first height direction, and a second height direction.

[0104] The first horizontal direction is the opposite of the second horizontal direction.

[0105] The first longitudinal direction is the opposite of the second longitudinal direction.

[0106] The first altitude direction is the opposite of the second altitude direction.

[0107] The horizontal direction is the collective term for the first horizontal direction and the second horizontal direction.

[0108] The longitudinal direction is the collective term for the first longitudinal direction and the second longitudinal direction.

[0109] The altitude direction is a general term encompassing the first altitude direction and the second altitude direction.

[0110] The horizontal axis is parallel to the X-axis.

[0111] The longitudinal axis is parallel to the Y-axis.

[0112] The height direction is parallel to the Z-axis.

[0113] The X-axis and Y-axis define the first reference plane.

[0114] The X-axis and Z-axis define a second reference plane.

[0115] The Y-axis and Z-axis define a third reference plane.

[0116] The joint 10 specifies a cross direction.

[0117] The direction of intersection is the direction that intersects with the height direction.

[0118] The intersecting direction includes the direction parallel to the first reference plane.

[0119] The intersecting directions include, for example, a first intersecting direction and a second intersecting direction.

[0120] The second intersection direction is the opposite of the first intersection direction.

[0121] The first and second intersecting directions are, for example, parallel to the first reference plane.

[0122] Intersecting directions include, for example, the third intersecting direction and the fourth intersecting direction.

[0123] The fourth intersection direction is the opposite of the third intersection direction.

[0124] The third and fourth intersection directions are, for example, parallel to the first reference plane.

[0125] The third intersection direction is orthogonal to the first and second intersection directions.

[0126] The fourth intersection direction is orthogonal to the first intersection direction and the second intersection direction.

[0127] The connector 10 includes a main body 100, a front end 200, and a joint 300.

[0128] The main body 100 supports the front end 200.

[0129] The front end 200 acts on the object.

[0130] The joining part 300 joins the main body part 100 with the front end part 200.

[0131] The main body 100 and the front end 200 are arranged, for example, along the height direction.

[0132] Examples of actions relative to an object include supporting, fixing, guiding, processing, inspecting, measuring, and cleaning.

[0133] The main body 100 is three-dimensional.

[0134] The surface 110 of the main body 100 includes a top surface 111, a bottom surface 112, and a side surface 113.

[0135] Examples of solids include prisms, cones, frustums, spheres, or regular polyhedra, or solids similar to these.

[0136] The main body 100 includes the first material.

[0137] Depending on the function of the main body 100, one or more first materials are selected from the group of predetermined materials.

[0138] The front end 200 is three-dimensional.

[0139] The surface 210 of the front end 200 includes a top surface 211, a bottom surface 212, and a side surface 213.

[0140] Examples of solids include prisms, cones, frustums, spheres, or regular polyhedra, or solids similar to these.

[0141] The front end portion 200 includes a second material.

[0142] Depending on the function of the front end 200, one or more second materials can be selected from the group of predetermined materials.

[0143] An example is given of the relationship between the first material and the second material.

[0144] In the first example, the first material is different from the second material.

[0145] In the second example, the first material is the same as the second material.

[0146] Examples of the first material used for the main body 100 include hard materials and ordinary materials.

[0147] Typically, the material is different from hard materials.

[0148] Examples of common materials include iron, steel, and cast iron.

[0149] The longitudinal elastic modulus of a material is usually less than that of a rigid material.

[0150] The longitudinal elastic modulus of rigid materials is greater than that of ordinary materials.

[0151] The second material of the front end 200 may include, for example, a rigid material.

[0152] Examples of hard materials include diamond, silicon carbide, boron carbide, titanium carbide, tungsten carbide, cubic boron nitride, titanium nitride, silicon nitride, aluminum nitride, and aluminum oxide.

[0153] The front end 200 is, for example, a sintered body.

[0154] Examples of sintered bodies include diamond sintered bodies, cubic boron nitride sintered bodies, ceramic sintered bodies, and superhard alloys.

[0155] The joint 300 includes the fitting part 310.

[0156] The fitting part 310 includes a main fitting part 120 and a front fitting part 220.

[0157] The main body fitting part 120 is provided on the main body part 100.

[0158] The front fitting part 220 is provided at the front end part 200.

[0159] The front fitting part 220 fits into the main fitting part 120.

[0160] In the fitted state where the main body fitting portion 120 and the front end fitting portion 220 are fitted together, the movement of the front end portion 200 relative to the main body portion 100 in the longitudinal and transverse directions is restricted.

[0161] The fitting portion 310 includes an insertion structure 320.

[0162] The insertion structure 320 is configured such that the main body fitting portion 120 and the front end portion 220 are fitted together by the relative movement of the main body portion 100 and the front end portion 200 in the height direction.

[0163] The fitting portion 310 includes a limiting structure 330.

[0164] The limiting structure 330 is configured to restrict the relative movement of the main body 100 and the front end 200 in the intersecting direction when the parts are engaged.

[0165] The main body fitting part 120 includes one or more main body undulation parts 130.

[0166] In the illustrated example, the main body fitting portion 120 includes a plurality of main body undulation portions 130.

[0167] The plurality of main body undulations 130 include at least a first main body undulation 130A and a second main body undulation 130B.

[0168] The main undulating part 130 is the collective name for the various main undulating parts 130A and 130B.

[0169] The body undulation 130 includes a concave portion 140 or a convex portion 150 .

[0170] An example is given for the structure of multiple main body undulations 130.

[0171] In the first example, all the main body undulations 130 include recesses 140.

[0172] In the second example, all the main body undulations 130 include convex portions 150.

[0173] In the third example, a portion of the main body undulation 130 includes a recess 140. Another portion of the main body undulation 130 includes a convex portion 150.

[0174] The front fitting portion 220 includes one or more front undulation portions 230.

[0175] In the illustrated example, the front fitting portion 220 includes a plurality of front undulation portions 230.

[0176] The plurality of front end undulations 230 include at least a first front end undulation 230A and a second front end undulation 230B.

[0177] The front end undulation 230 is a general term for all front end undulations 230A and 230B.

[0178] The front end undulation 230 is configured to correspond to the main body undulation 130.

[0179] The front end undulation part 230 is fitted with the corresponding main body undulation part 130.

[0180] The first front end undulating part 230A corresponds to the first main body undulating part 130A.

[0181] The second front end undulating part 230B corresponds to the second main body undulating part 130B.

[0182] The front end undulation 230 includes a convex part 240 or a concave part 250.

[0183] An example is given for the structure of multiple front-end undulations 230.

[0184] In the first example, all the front end undulations 230 include the protrusions 240.

[0185] In the second example, the front end undulation 230 includes the recess 250.

[0186] In the third example, a portion of the front end undulation 230 includes a convex portion 240. Another portion of the front end undulation 230 includes a concave portion 250.

[0187] A corresponding main body undulation part 130 and a front end undulation part 230 constitute a unit fitting part 311.

[0188] In the illustrated example, the fitting portion 310 includes a plurality of unit fitting portions 311.

[0189] The insertion structure 320 includes an opening in the recess of the main body undulation 130 or an opening in the recess of the front end undulation 230.

[0190] The limiting structure 330 includes one or more unit fittings 311.

[0191] As examples of the form of the restricted construction 330, the first form and the second form can be given.

[0192] The first type of restriction structure 330 is configured to restrict the relative movement of the main body 100 and the front end 200 in the first intersection direction and the second intersection direction by means of at least two unit fitting parts 311.

[0193] The second type of restriction structure 330 is configured to restrict the relative movement of the main body 100 and the front end 200 in the first intersection direction and the second intersection direction by means of at least one unit fitting part 311.

[0194] The types of unit fitting parts 311 can be classified as, for example, first restricted fitting parts, second restricted fitting parts, third restricted fitting parts, fourth restricted fitting parts, fifth restricted fitting parts, sixth restricted fitting parts, and unrestricted fitting parts.

[0195] Examples of the forms of the first restricted mating part include the first form and the second form.

[0196] The first type of first-restricted fitting includes the following structure.

[0197] The first limiting fitting portion is configured to restrict the relative movement of the main body portion 100 and the front end portion 200 at least in the first intersecting direction. The first limiting fitting portion is configured not to restrict the relative movement of the main body portion 100 and the front end portion 200 in the second intersecting direction.

[0198] The first limiting fitting part of the second form includes the following structure.

[0199] In addition to the structure of the first type, the first limiting fitting portion is also configured to restrict the relative movement of the main body portion 100 and the front end portion 200 in a crossing direction different from the first crossing direction and the second crossing direction. The crossing direction different from the first crossing direction and the second crossing direction includes, for example, at least one of the third crossing direction and the fourth crossing direction.

[0200] Examples of the forms of the second restricted fitting can be given as the first form and the second form.

[0201] The second limiting fitting portion of the first form includes the following structure.

[0202] The second limiting fitting portion is configured to restrict the relative movement of the main body portion 100 and the front end portion 200 at least in the second intersecting direction. The second limiting fitting portion is configured not to restrict the relative movement of the main body portion 100 and the front end portion 200 in the first intersecting direction.

[0203] The second type of the second restricted fitting includes the following structure.

[0204] In addition to the structure of the first type, the second limiting fitting portion is also configured to restrict the relative movement of the main body portion 100 and the front end portion 200 in a crossing direction different from the first crossing direction and the second crossing direction. The crossing direction different from the first crossing direction and the second crossing direction includes, for example, at least one of the third crossing direction and the fourth crossing direction.

[0205] Examples of the third type of restricted interlocking part include the first and second forms.

[0206] The third limiting fitting of the first form includes the following structure.

[0207] The third limiting fitting portion is configured to restrict the relative movement of the main body portion 100 and the front end portion 200 at least in the first intersecting direction and the second intersecting direction.

[0208] The third restrictive fitting in the second form includes the following structure.

[0209] In addition to the structure of the first type, the third limiting fitting portion is configured to restrict the relative movement of the main body portion 100 and the front end portion 200 in a crossing direction different from the first crossing direction and the second crossing direction. The crossing direction different from the first crossing direction and the second crossing direction includes, for example, at least one of the third crossing direction and the fourth crossing direction.

[0210] Examples of the forms of the fourth restricted mating part include the first form and the second form.

[0211] The fourth limiting fitting of the first form includes the following structure.

[0212] The fourth limiting fitting part has the same function as the first limiting fitting part of the first form, but has a different structure from the first limiting fitting part of the first form.

[0213] The fourth restrictive fitting in the second form includes the following structure.

[0214] The fourth limiting fitting part has the same function as the first limiting fitting part of the second form, but has a different structure from the first limiting fitting part of the second form.

[0215] Examples of the forms of the fifth restricted mating part include the first form and the second form.

[0216] The fifth limiting fitting of the first form includes the following structure.

[0217] The fifth limiting fitting part has the same function as the second limiting fitting part of the first form, but has a different structure from the second limiting fitting part of the first form.

[0218] The fifth restrictive fitting in the second form includes the following structure.

[0219] The fifth limiting fitting portion has the same function as the second limiting fitting portion of the second form, but has a different structure from the second limiting fitting portion of the second form.

[0220] Examples of the forms of the sixth restricted mating part include the first form and the second form.

[0221] The sixth limiting fitting part of the first form includes the following structure.

[0222] The sixth limiting fitting part has the same function as the third limiting fitting part of the first form, but has a different structure from the third limiting fitting part of the first form.

[0223] The sixth limiting fitting in the second form includes the following structure.

[0224] The sixth limiting fitting part has the same function as the third limiting fitting part of the second form, but has a different structure from the third limiting fitting part of the second form.

[0225] Examples of unrestricted mating forms include the first form and the second form.

[0226] The first type of unrestricted fitting includes the following structure.

[0227] The unrestricted fitting portion is configured such that there is no restriction on the relative movement of the main body portion 100 and the front end portion 200 in at least the first intersecting direction and the second intersecting direction.

[0228] The second type of unrestricted fitting includes the following structure.

[0229] In addition to the structure of the first type, the unrestricted fitting portion is configured such that there is no restriction on the relative movement of the main body portion 100 and the front end portion 200 in intersection directions different from the first intersection direction and the second intersection direction. The intersection directions different from the first intersection direction and the second intersection direction include, for example, at least one of the third intersection direction and the fourth intersection direction.

[0230] An example of a structure 330 with respect to the first form of constraints is given.

[0231] In the first example, the limiting structure 330 includes at least one first limiting fitting portion and at least one second limiting fitting portion.

[0232] In the second example, the limiting structure 330, in addition to the structure of the first example, also includes at least one third limiting fitting portion.

[0233] In the third example, the limiting structure 330, in addition to the structure of the first or second example, also includes at least one fourth limiting fitting part.

[0234] In the fourth example, the restriction structure 330 includes at least one fifth restriction fitting part in addition to any one of the structures in the first to third examples.

[0235] In the fifth example, the restriction structure 330 includes at least one sixth restriction fitting part in addition to any one of the structures in the first to fourth examples.

[0236] In the sixth example, the restricted structure 330 includes at least one unrestricted fitting part in addition to any one of the structures in the first to fifth examples.

[0237] An example of the structure of the second form of restricted construction 330 is given.

[0238] In the first example, the limiting structure 330 includes at least one third limiting fitting portion.

[0239] In the second example, the limiting structure 330, in addition to the structure of the first example, also includes at least one first limiting fitting portion.

[0240] In the third example, the limiting structure 330, in addition to the structure of the first or second example, also includes at least one second limiting fitting part.

[0241] In the fourth example, the restriction structure 330 includes at least one fourth restriction fitting part in addition to any one of the structures in the first to third examples.

[0242] In the fifth example, the restriction structure 330 includes at least one fifth restriction fitting part in addition to any one of the structures in the first to fourth examples.

[0243] In the sixth example, the restriction structure 330 includes at least one sixth restriction fitting part in addition to any one of the structures in the first to fifth examples.

[0244] In the seventh example, the restricted structure 330 includes at least one unrestricted fitting part in addition to any one of the structures in the first to sixth examples.

[0245] The following is a specific example related to the first form of the restricted construction 330.

[0246] The limiting structure 330 includes a first limiting fitting part and a second limiting fitting part.

[0247] The first limiting fitting portion includes a first main body undulation portion 130A and a first front end undulation portion 230A.

[0248] The first main body undulation portion 130A and the first front end undulation portion 230A are configured to restrict the relative movement of the main body portion 100 and the front end portion 200 in the first intersecting direction. The first intersecting direction is, for example, the first longitudinal direction.

[0249] The second limiting fitting part includes a second main body undulation part 130B and a second front end undulation part 230B.

[0250] The second main body undulation portion 130B and the second front end undulation portion 230B are configured to restrict the relative movement of the main body portion 100 and the front end portion 200 in the second intersecting direction. The second intersecting direction is, for example, the second longitudinal direction.

[0251] The following is a specific example related to the second form of restricted construction 330.

[0252] The limiting structure 330 includes a third limiting fitting portion.

[0253] The third limiting fitting portion includes a first main body undulation portion 130A and a first front end undulation portion 230A or a second main body undulation portion 130B and a second front end undulation portion 230B.

[0254] The first main body undulation portion 130A and the first front end undulation portion 230A, or the second main body undulation portion 130B and the second front end undulation portion 230B, are configured to restrict the relative movement of the main body portion 100 and the front end portion 200 in the first intersecting direction and the second intersecting direction. The first intersecting direction is, for example, a first longitudinal direction. The second intersecting direction is, for example, a second longitudinal direction.

[0255] The joint 300 includes a fixing part 340.

[0256] The fixing part 340 fixes the front end 200 to the main body 100 in the fitted state.

[0257] The state in which the front end 200 is fixed to the main body 100 is called the "fixed state".

[0258] In a fixed state, the movement of the front end portion 200 relative to the main body portion 100 in the longitudinal, transverse, and height directions is restricted.

[0259] The fixing part 340 fixes the front end 200 to the main body 100, for example, by at least one of chemical bonding and mechanical bonding.

[0260] As an example of chemically based bonding and fixation, the use of adhesives for fixation can be cited.

[0261] As an example of a fixation based on mechanical engagement, a fixation using press-fitting can be cited.

[0262] The fixing part 340 includes, for example, at least one of the adhesive part 350 and the pressing part 360.

[0263] The adhesive portion 350 includes, for example, a layer of adhesive. The adhesive layer is disposed, for example, between the surface of the main body undulation 130 and the surface of the front end undulation 230. The adhesive layer bonds the surface of the main body undulation 130 to the surface of the front end undulation 230.

[0264] The pressing portion 360 includes, for example, the surface of the pressing main body undulation portion 130 and the surface of the front end undulation portion 230. The main body undulation portion 130 and the front end undulation portion 230 are fixed by the frictional force between the surface of the main body undulation portion 130 and the surface of the front end undulation portion 230.

[0265] (Second Implementation)

[0266] The joint 10 of the second embodiment is constructed based on the first embodiment.

[0267] Figure 2 An example of the joint 10 is shown.

[0268] The form of the restricted construction 330 is either the first form or the second form.

[0269] The limiting structure 330 may include, for example, at least one first limiting fitting portion and at least one second limiting fitting portion, or at least one third limiting fitting portion.

[0270] Figure 2 A cross-sectional view of the joint 10, parallel to the second reference plane, is shown through the joint 300.

[0271] The body relief 130 includes a recess 140 .

[0272] The front end undulation 230 includes a convex portion 240 .

[0273] The unit fitting portion 311 includes a corresponding recess 140 and a protrusion 240.

[0274] The recess 140 includes a concave surface 141, a configuration space 142, and an opening 143.

[0275] The concave surface 141 defines the configuration space 142.

[0276] The configuration space 142 is configured to be able to configure the front end undulation 230.

[0277] The opening 143 is located on the top surface 111 of the main body 100.

[0278] The opening 143 is connected to the configuration space 142.

[0279] The protrusion 240 protrudes in the second height direction relative to the bottom surface 212 of the front end portion 200.

[0280] The convex part 240 is, for example, a cylinder.

[0281] The base of a cylinder can be shaped like a polygon or an ellipse. An ellipse includes a circle.

[0282] (Third Implementation)

[0283] The joint 10 of the third embodiment is constructed based on the first embodiment.

[0284] Figure 3 An example of the joint 10 is shown.

[0285] The form of the restricted construction 330 is either the first form or the second form.

[0286] The limiting structure 330 may include, for example, at least one first limiting fitting portion and at least one second limiting fitting portion, or at least one third limiting fitting portion.

[0287] Figure 3 A cross-sectional view of the joint 10, parallel to the second reference plane, is shown through the joint 300.

[0288] The body undulation 130 includes a convex portion 150 .

[0289] The front end undulation 230 includes a recess 250 .

[0290] The unit fitting portion 311 includes a corresponding protrusion 150 and a recess 250.

[0291] The protrusion 150 protrudes in a first height direction relative to the top surface 111 of the main body 100.

[0292] The convex part 150 is, for example, a column.

[0293] The base of a cylinder can be shaped like a polygon or an ellipse. An ellipse includes a circle.

[0294] The recess 250 includes a concave surface 251, a configuration space 252, and an opening 253.

[0295] The concave surface 251 defines the configuration space 252.

[0296] The configuration space 252 is configured to accommodate the main body undulation 130.

[0297] The opening 253 is located on the bottom surface 212 of the front end portion 200.

[0298] The opening 253 is connected to the configuration space 252.

[0299] (Fourth Implementation)

[0300] The joint 10 of the fourth embodiment is constructed based on the second embodiment.

[0301] Figures 4-7 An example of the joint 10 is shown.

[0302] Figure 4 The front view of the joint 10 is shown.

[0303] Figure 5 A top view of the main body 100 is shown.

[0304] Figure 6 A bottom view of the front end 200 is shown.

[0305] The form of the restricted construction 330 is the first form.

[0306] The limiting structure 330 includes, for example, a plurality of first limiting fitting parts and a plurality of second limiting fitting parts.

[0307] In one example, the first and second limiting fitting parts are alternately arranged in the lateral direction.

[0308] The surface 110 of the main body 100 includes a plurality of top surfaces 111.

[0309] Multiple top surfaces 111 are arranged horizontally with intervals between them.

[0310] The top surface 111 faces the direction of the first height.

[0311] The top surface 111 is a plane.

[0312] The top surface 111 is parallel to the first reference surface.

[0313] The bottom surface 112 faces the direction of the second height.

[0314] The bottom surface 112 is a plane.

[0315] The parallel plane of the bottom surface 112 is parallel to the first reference plane.

[0316] The surface 110 of the main body 100 includes multiple side surfaces 113.

[0317] The multiple sides 113 include a first side 113A, a second side 113B, a third side 113C, and a fourth side 113D.

[0318] Side 113 is the general term for all sides 113A to 113D.

[0319] The first side surface 113A is located in the first longitudinal direction relative to the top surface 111 and the bottom surface 112.

[0320] The first side surface 113A is connected to the top surface 111 and the bottom surface 112.

[0321] The first side surface 113A is a plane.

[0322] The first side surface 113A is parallel to the second reference plane.

[0323] The second side surface 113B is located in the second longitudinal direction relative to the top surface 111 and the bottom surface 112.

[0324] The second side surface 113B is connected to the top surface 111 and the bottom surface 112.

[0325] The second side 113B is a plane.

[0326] The second side surface 113B is parallel to the second reference plane.

[0327] The third side 113C is located in the first transverse direction relative to the top surface 111 and the bottom surface 112.

[0328] The third side surface 113C is connected to the top surface 111 and the bottom surface 112.

[0329] The third side 113C is a plane.

[0330] The third side surface 113C is parallel to the third reference plane.

[0331] The fourth side 113D is located in the second transverse direction relative to the top surface 111 and the bottom surface 112.

[0332] The fourth side surface 113D is connected to the top surface 111 and the bottom surface 112.

[0333] The fourth side 113D is a plane.

[0334] The fourth side surface 113D is parallel to the third reference plane.

[0335] The main body 100 includes multiple main body undulating parts 130.

[0336] Multiple main undulating parts are spaced 130 apart and arranged horizontally.

[0337] The body relief 130 includes a recess 140 .

[0338] The recess 140 includes a plurality of openings 143.

[0339] The plurality of openings 143 include a first side opening 143A, a second side opening 143B, and a top opening 143C.

[0340] The first side opening 143A opens on the first side 113A.

[0341] The second side opening 143B opens on the second side 113B.

[0342] The top opening 143C is an opening on the top surface 111.

[0343] The top opening 143C is connected to the side openings 143A and 143B.

[0344] The insertion configuration 320 includes a top opening 143C.

[0345] The insertion structure 320 is configured such that, by the relative movement of the main body 100 and the front end portion 200 in the height direction, the protrusion 240 of the front end portion 230 can be disposed in the placement space 142 of the recess 140 via the top opening 143C.

[0346] The concave surface 141 of the recess 140 includes a third side surface 141C, a fourth side surface 141D, and a bottom surface 141E.

[0347] The third side 141C is located in the first lateral direction relative to the configuration space 142.

[0348] The third side 141C is a plane.

[0349] The third side 141C intersects with the third reference plane.

[0350] The third side 141C includes an inclined surface.

[0351] The third side 141C includes the first side and the second side.

[0352] The first side is located in the first longitudinal direction relative to the center of the third side 141C.

[0353] The first side corresponds to the boundary between the third side 141C and the first side 113A.

[0354] The second side is located in the second longitudinal direction, relative to the center of the third side 141C.

[0355] The second side corresponds to the boundary between the third side 141C and the second side 113B.

[0356] The fourth side 141D is located in the second lateral direction relative to the configuration space 142.

[0357] The fourth side 141D is a plane.

[0358] The fourth side 141D intersects with the third reference plane.

[0359] The fourth side 141D includes an inclined surface.

[0360] The fourth side 141D includes the first side and the second side.

[0361] The first side is located in the first longitudinal direction, relative to the center of the fourth side 141D.

[0362] The first side corresponds to the boundary between the fourth side 141D and the first side 113A.

[0363] The second side is located in the second longitudinal direction, relative to the center of the fourth side 141D.

[0364] The second side corresponds to the boundary between the fourth side 141D and the second side 113B.

[0365] The bottom surface 141E is located in the second height direction relative to the configuration space 142.

[0366] The bottom surface 141E is connected to each of the side surfaces 141C and 141D.

[0367] The bottom surface 141E is a plane.

[0368] The bottom surface 141E is parallel to the first reference surface.

[0369] The structures of the side surfaces 141C and 141D in the recess 140 of the first main body undulation portion 130A and the recess 140 of the second main body undulation portion 130B are different.

[0370] Regarding the third side 141C of the recess 140 of the first main body undulation portion 130A, in the lateral direction, the first side is located in the second lateral direction relative to the second side.

[0371] The third side 141C of the recess 140 of the first main body undulation 130A is inclined in a manner that it is inclined in the longitudinal direction toward the first longitudinal direction and in the transverse direction toward the second transverse direction.

[0372] Regarding the fourth side 141D of the recess 140 of the first main body undulation portion 130A, in the lateral direction, the first side is located in the first lateral direction relative to the second side.

[0373] The fourth side 141D of the recess 140 of the first main body undulation 130A is inclined in a manner that is inclined in the longitudinal direction toward the first longitudinal direction and in the transverse direction toward the first transverse direction.

[0374] Regarding the third side 141C of the recess 140 of the second main body undulation portion 130B, in the lateral direction, the second side is located in the second lateral direction relative to the first side.

[0375] The third side 141C of the recess 140 of the second main body undulation 130B is inclined in a manner that is inclined in the longitudinal direction toward the first longitudinal direction and in the transverse direction toward the first transverse direction.

[0376] Regarding the fourth side 141D of the recess 140 of the second main body undulation portion 130B, in the lateral direction, the second side is located in the first lateral direction relative to the first side.

[0377] The fourth side 141D of the recess 140 of the second main body undulation 130B is inclined in a manner that is directed toward the first longitudinal direction in the longitudinal direction and toward the second transverse direction in the transverse direction.

[0378] The surface 210 of the front end 200 includes a plurality of side surfaces 213.

[0379] The multiple sides 213 include a first side 213A, a second side 213B, a third side 213C, and a fourth side 213D.

[0380] Side 213 is the general term for all sides 213A to 213D.

[0381] The first side surface 213A is located in the first longitudinal direction relative to the top surface 211 and the bottom surface 212.

[0382] The first side surface 213A is connected to the top surface 211 and the bottom surface 212.

[0383] The first side surface 213A is a plane.

[0384] The first side surface 213A is parallel to the second reference plane.

[0385] The second side surface 213B is located in the second longitudinal direction relative to the top surface 211 and the bottom surface 212.

[0386] The second side surface 213B is connected to the top surface 211 and the bottom surface 212.

[0387] The second side 213B is a plane.

[0388] The second side surface 213B is parallel to the second reference plane.

[0389] The third side surface 213C is located in the first transverse direction relative to the top surface 211 and the bottom surface 212.

[0390] The third side surface 213C is connected to the top surface 211 and the bottom surface 212.

[0391] The third side 213C is a plane.

[0392] The third side surface 213C is parallel to the third reference plane.

[0393] The fourth side surface 213D is located in the second transverse direction relative to the top surface 211 and the bottom surface 212.

[0394] The fourth side surface 213D is connected to the top surface 211 and the bottom surface 212.

[0395] The fourth side, 213D, is a plane.

[0396] The fourth side surface 213D is parallel to the third reference plane.

[0397] The front end portion 200 includes a plurality of front end undulations 230.

[0398] Multiple front undulations are spaced apart and arranged horizontally.

[0399] The front end undulation 230 includes a convex portion 240 .

[0400] The surface 241 of the protrusion 240 includes a first side surface 241A, a second side surface 241B, a third side surface 241C, a fourth side surface 241D, and a top surface 241E.

[0401] The first side surface 241A is located in the first longitudinal direction relative to the top surface 241E.

[0402] The first side surface 241A is a plane.

[0403] The first side surface 241A is parallel to the second reference plane.

[0404] The second side surface 241B is located in the second longitudinal direction relative to the top surface 241E.

[0405] The second side 241B is a plane.

[0406] The second side surface 241B is parallel to the second reference plane.

[0407] The third side surface 241C is located in the first lateral direction relative to the top surface 241E.

[0408] The third side 241C is a plane.

[0409] The third side 241C intersects with the third reference plane.

[0410] The third side 241C includes an inclined surface.

[0411] The third side 241C includes the first side and the second side.

[0412] The first side is located in the first longitudinal direction, relative to the center of the third side 241C.

[0413] The first side corresponds to the boundary between the third side 241C and the first side 241A.

[0414] The second side is located in the second longitudinal direction, relative to the center of the third side 241C.

[0415] The second side corresponds to the boundary between the third side 241C and the second side 241B.

[0416] The fourth side 241D is located in the second lateral direction relative to the top surface 241E.

[0417] The fourth side, 241D, is a plane.

[0418] The fourth side 241D intersects with the third reference plane.

[0419] The fourth side 241D includes an inclined surface.

[0420] The fourth side 241D includes the first side and the second side.

[0421] The first side is located in the first longitudinal direction, relative to the center of the fourth side 241D.

[0422] The first side corresponds to the boundary between the fourth side 241D and the first side 241A.

[0423] The second side is located in the second longitudinal direction, relative to the center of the fourth side 241D.

[0424] The second side corresponds to the boundary between the fourth side 241D and the second side 241B.

[0425] The structures of the convex portions 240 of the first front end undulation portion 230A and the convex portions 240 of the second front end undulation portion 230B are different on each side 241C and 241D.

[0426] Regarding the third side 241C of the protrusion 240 of the first front end undulation 230A, in the transverse direction, the first side is located in the second transverse direction relative to the second side.

[0427] The third side 241C of the protrusion 240 of the first front end undulation 230A is inclined in a manner that is directed toward the first longitudinal direction and toward the second transverse direction.

[0428] Regarding the fourth side 241D of the protrusion 240 of the first front end undulation 230A, in the transverse direction, the first side is located in the first transverse direction relative to the second side.

[0429] The fourth side 241D of the protrusion 240 of the first front end undulation 230A is inclined in a manner that is inclined in the longitudinal direction toward the first longitudinal direction and in the transverse direction toward the first transverse direction.

[0430] Regarding the third side 241C of the protrusion 240 of the second front end undulation 230B, in the lateral direction, the second side is located in the second lateral direction relative to the first side.

[0431] The third side 241C of the protrusion 240 of the second front end undulation 230B is inclined in a manner that is inclined in the longitudinal direction toward the first longitudinal direction and in the transverse direction toward the first transverse direction.

[0432] Regarding the fourth side 241D of the protrusion 240 of the second front end undulation 230B, in the transverse direction, the second side is located in the first transverse direction relative to the first side.

[0433] The fourth side 241D of the protrusion 240 of the second front end undulation 230B is inclined in a manner that is directed toward the first longitudinal direction in the longitudinal direction and toward the second transverse direction in the transverse direction.

[0434] Figure 7 A cross-sectional view of the joint 10, parallel to the first reference plane, is shown through the joint 300.

[0435] The first limiting fitting portion includes a first main body undulation portion 130A and a first front end undulation portion 230A.

[0436] The undulations 130A and 230A have the following relationship.

[0437] The third side 141C faces the third side 241C.

[0438] The third side 141C is parallel to the third side 241C.

[0439] The fourth side 141D faces the fourth side 241D.

[0440] The fourth side 141D is parallel to the fourth side 241D.

[0441] The first limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first longitudinal and first transverse directions through the relationship between the third side surface 141C and the third side surface 241C.

[0442] The first limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first longitudinal direction and the second transverse direction through the relationship between the fourth side surface 141D and the fourth side surface 241D.

[0443] The second limiting fitting part includes a second main body undulation part 130B and a second front end undulation part 230B.

[0444] The undulations 130B and 230B have the following relationship.

[0445] The third side 141C faces the third side 241C.

[0446] The third side 141C is parallel to the third side 241C.

[0447] The fourth side 141D faces the fourth side 241D.

[0448] The fourth side 141D is parallel to the fourth side 241D.

[0449] The second limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the second longitudinal direction and the first transverse direction through the relationship between the third side surface 141C and the third side surface 241C.

[0450] The second limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the second longitudinal and second transverse directions through the relationship between the fourth side surface 141D and the fourth side surface 241D.

[0451] In the illustrated example, the joint 300 includes a fixing part 340.

[0452] The fixing part 340 includes the adhesive part 350.

[0453] The adhesive portion 350 includes a layer of adhesive.

[0454] The adhesive portion 350 is provided, for example, between the concave surface 141 of the recess 140 and the surface 241 of the convex portion 240.

[0455] (Fifth Implementation)

[0456] The joint 10 of the fifth embodiment is constructed based on the fourth embodiment.

[0457] Figure 8 An example of the joint 10 is shown.

[0458] In the fifth embodiment of the joint 10, the structure of the recess 140 of the main body undulation 130 and the structure of the protrusion 240 of the front end undulation 230 differ from those of the previous embodiment. Other structures of the joint 10 of the fifth embodiment are shared with those of the previous embodiment.

[0459] Figure 8 A cross-sectional view of the joint 10, parallel to the first reference plane, is shown through the joint 300.

[0460] The structures of the side surfaces 141C and 141D in the recess 140 of the first main body undulation portion 130A and the recess 140 of the second main body undulation portion 130B are different.

[0461] Regarding the fourth side 141D of the recess 140 of the first main body undulation portion 130A, in the lateral direction, the first side is located in the second lateral direction relative to the second side.

[0462] The fourth side 141D of the recess 140 of the first main body undulation 130A is inclined in a manner that it is inclined in the longitudinal direction toward the first longitudinal direction and in the transverse direction toward the second transverse direction.

[0463] In one example, the fourth side 141D of the recess 140 of the first body undulation 130A is parallel to the third side 141C.

[0464] Regarding the fourth side 141D of the recess 140 of the second main body undulation portion 130B, the second side is located in the second lateral direction relative to the first side.

[0465] The fourth side 141D of the recess 140 of the second main body undulation 130B is inclined in a manner that is inclined in the longitudinal direction toward the first longitudinal direction and in the transverse direction toward the first transverse direction.

[0466] In one example, the fourth side 141D of the recess 140 of the second body undulation 130B is parallel to the third side 141C.

[0467] In the protrusion 240 of the first front end undulation 230A and the protrusion 240 of the second front end undulation 230B, the inclination directions of each side 241C and 241D relative to the third reference plane are different.

[0468] Regarding the fourth side 241D of the protrusion 240 of the first front end undulation 230A, in the transverse direction, the first side is located in the second transverse direction relative to the second side.

[0469] The fourth side 241D of the protrusion 240 of the first front end undulation 230A is inclined in a manner that is directed toward the first longitudinal direction and toward the second transverse direction.

[0470] In one example, the fourth side 241D of the convex portion 240 of the first front end undulation portion 230A is parallel to the third side 241C.

[0471] Regarding the fourth side 241D of the protrusion 240 of the second front end undulation 230B, in the lateral direction, the second side is located in the second lateral direction relative to the first side.

[0472] The fourth side 241D of the protrusion 240 of the second front end undulation 230B is inclined in a manner that is directed toward the first longitudinal direction in the longitudinal direction and toward the first transverse direction in the transverse direction.

[0473] In one example, the fourth side 241D of the convex portion 240 of the second front end undulation portion 230B is parallel to the third side 241C.

[0474] The first limiting fitting portion includes a first main body undulation portion 130A and a first front end undulation portion 230A.

[0475] The relationship between each undulation part 130A and 230A is based on the relationship between each undulation part 130A and 230A in the implementation of the premise.

[0476] The first limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first longitudinal and first transverse directions through the relationship between the third side surface 141C and the third side surface 241C.

[0477] The first limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the second longitudinal and second transverse directions through the relationship between the fourth side surface 141D and the fourth side surface 241D.

[0478] The second limiting fitting part includes a second main body undulation part 130B and a second front end undulation part 230B.

[0479] The relationship between the undulations 130B and 230B is based on the relationship between the undulations 130B and 230B in the implementation of the premise.

[0480] The second limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the second longitudinal direction and the first transverse direction through the relationship between the third side surface 141C and the third side surface 241C.

[0481] The second limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first longitudinal direction and the second transverse direction through the relationship between the fourth side surface 141D and the fourth side surface 241D.

[0482] (Sixth Implementation Method)

[0483] The joint 10 of the sixth embodiment is constructed based on the fourth embodiment.

[0484] Figure 9 An example of the joint 10 is shown.

[0485] In the joint 10 of the sixth embodiment, the structure of the recess 140 of the main body undulation 130 and the structure of the protrusion 240 of the front end undulation 230 differ from those of the previous embodiment. Other structures of the joint 10 of the sixth embodiment are shared with those of the previous embodiment.

[0486] Figure 9 A cross-sectional view of the joint 10, parallel to the first reference plane, is shown through the joint 300.

[0487] The structures of the side surfaces 141C and 141D in the recess 140 of the first main body undulation portion 130A and the recess 140 of the second main body undulation portion 130B are different.

[0488] The fourth side surface 141D of the recess 140 of the first main body undulation 130A is parallel to the third reference plane.

[0489] The third side surface 141C of the recess 140 of the second main body undulation 130B is parallel to the third reference plane.

[0490] The structures of the convex portions 240 of the first front end undulation portion 230A and the convex portions 240 of the second front end undulation portion 230B are different on each side 241C and 241D.

[0491] The fourth side surface 241D of the convex portion 240 of the first front end undulation portion 230A is parallel to the third reference plane.

[0492] The third side surface 241C of the convex portion 240 of the second front end undulation portion 230B is parallel to the third reference plane.

[0493] The first limiting fitting portion includes a first main body undulation portion 130A and a first front end undulation portion 230A.

[0494] The relationship between each undulation part 130A and 230A is based on the relationship between each undulation part 130A and 230A in the implementation of the premise.

[0495] The first limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first longitudinal and first transverse directions through the relationship between the third side surface 141C and the third side surface 241C.

[0496] The first limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the second lateral direction through the relationship between the fourth side surface 141D and the fourth side surface 241D.

[0497] The second limiting fitting part includes a second main body undulation part 130B and a second front end undulation part 230B.

[0498] The relationship between the undulations 130B and 230B is based on the relationship between the undulations 130B and 230B in the implementation of the premise.

[0499] The second limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first transverse direction through the relationship between the third side surface 141C and the third side surface 241C.

[0500] The second limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the second longitudinal and second transverse directions through the relationship between the fourth side surface 141D and the fourth side surface 241D.

[0501] (Seventh Implementation)

[0502] The joint 10 of the seventh embodiment is constructed based on the fourth embodiment.

[0503] Figure 10 An example of the joint 10 is shown.

[0504] In the seventh embodiment of the joint 10, the structure of the recess 140 of the main body undulation 130 and the structure of the protrusion 240 of the front end undulation 230 differ from those of the previous embodiment. Other structures of the joint 10 of the seventh embodiment are shared with those of the previous embodiment.

[0505] Figure 10 A cross-sectional view of the joint 10, parallel to the first reference plane, is shown through the joint 300.

[0506] In the recess 140 of the first main body undulation 130A and the recess 140 of the second main body undulation 130B, the relationships between each side surface 141C, 141D and the third reference surface are different.

[0507] The third side surface 141C of the recess 140 of the first main body undulation 130A is parallel to the third reference plane.

[0508] The fourth side surface 141D of the recess 140 of the second main body undulation 130B is parallel to the third reference plane.

[0509] In the protrusion 240 of the first front end undulation 230A and the protrusion 240 of the second front end undulation 230B, the relationships between each side 241C, 241D and the third reference plane are different.

[0510] The third side surface 241C of the convex portion 240 of the first front end undulation portion 230A is parallel to the third reference plane.

[0511] The fourth side surface 241D of the convex portion 240 of the second front end undulation portion 230B is parallel to the third reference plane.

[0512] The first limiting fitting portion includes a first main body undulation portion 130A and a first front end undulation portion 230A.

[0513] The relationship between each undulation part 130A and 230A is based on the relationship between each undulation part 130A and 230A in the implementation of the premise.

[0514] The first limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first transverse direction through the relationship between the third side surface 141C and the third side surface 241C.

[0515] The first limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first longitudinal direction and the second transverse direction through the relationship between the fourth side surface 141D and the fourth side surface 241D.

[0516] The second limiting fitting part includes a second main body undulation part 130B and a second front end undulation part 230B.

[0517] The relationship between the undulations 130B and 230B is based on the relationship between the undulations 130B and 230B in the implementation of the premise.

[0518] The second limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the second longitudinal direction and the first transverse direction through the relationship between the third side surface 141C and the third side surface 241C.

[0519] The second limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the second lateral direction through the relationship between the fourth side surface 141D and the fourth side surface 241D.

[0520] (Eighth Implementation Method)

[0521] The joint 10 of the eighth embodiment is constructed based on the fourth embodiment.

[0522] Figures 11-13 An example of the joint 10 is shown.

[0523] In the joint 10 of the eighth embodiment, the structure of the concave surface 141 of the recess 140 of the main body undulation 130 and the structure of the surface 241 of the protrusion 240 of the front end undulation 230 are different from those of the previous embodiment. Other structures of the joint 10 of the eighth embodiment are shared with the structures of the previous embodiment.

[0524] Figure 11 This shows the front view of the joint 10.

[0525] Figure 12 A cross-sectional view of the joint 10, parallel to the third reference plane, is shown through the first limiting fitting portion.

[0526] Figure 13 A cross-sectional view of the joint 10, parallel to the third reference plane, is shown through the second limiting fitting portion.

[0527] The third side surface 141C of the recess 140 of the first main body undulation 130A is parallel to the third reference plane.

[0528] The fourth side surface 141D of the recess 140 of the first main body undulation 130A is parallel to the third reference plane.

[0529] The third side surface 141C of the recess 140 of the second main body undulation 130B is parallel to the third reference plane.

[0530] The fourth side surface 141D of the recess 140 of the second main body undulation 130B is parallel to the third reference plane.

[0531] Figure 12 A cross-sectional view parallel to the third reference plane is shown through the first main body undulation 130A.

[0532] Figure 13 A cross-sectional view parallel to the third reference plane is shown through the second main body undulation 130B.

[0533] The bottom surface 141E of the recess 140 intersects with the third reference surface.

[0534] The bottom surface 141E includes an inclined surface.

[0535] The bottom surface 141E includes the first side and the second side.

[0536] The first side is located in the first longitudinal direction, relative to the center of the bottom surface 141E.

[0537] The first side corresponds to the boundary between the bottom surface 141E and the first side surface 113A.

[0538] The second side is located in the second longitudinal direction, relative to the center of the bottom surface 141E.

[0539] The second side corresponds to the boundary between the bottom surface 141E and the second side surface 113B.

[0540] The bottom surface 141E has a different structure in the recess 140 of the first main body undulation portion 130A and the recess 140 of the second main body undulation portion 130B.

[0541] Regarding the bottom surface 141E of the recess 140 of the first main body undulation portion 130A, in the height direction, the first side is located in the first height direction relative to the second side.

[0542] The bottom surface 141E of the recess 140 of the first main body undulation 130A is inclined in such a way that it is inclined in the longitudinal direction toward the first longitudinal direction and in the height direction toward the first height direction.

[0543] Regarding the bottom surface 141E of the recess 140 of the second main body undulating portion 130B, in the height direction, the second side is located in the first height direction relative to the first side.

[0544] The bottom surface 141E of the recess 140 of the second main body undulation 130B is inclined in a manner that it is oriented toward the second longitudinal direction in the longitudinal direction and toward the first height direction in the height direction.

[0545] The third side surface 241C of the convex portion 240 of the first front end undulation portion 230A is parallel to the third reference plane.

[0546] The fourth side surface 241D of the convex portion 240 of the first front end undulation portion 230A is parallel to the third reference plane.

[0547] The third side surface 241C of the convex portion 240 of the second front end undulation portion 230B is parallel to the third reference plane.

[0548] The fourth side surface 241D of the convex portion 240 of the second front end undulation portion 230B is parallel to the third reference plane.

[0549] The top surface 241E of the protrusion 240 intersects with the third reference surface.

[0550] The top surface 241E includes an inclined surface.

[0551] The top surface 241E includes the first side and the second side.

[0552] The first side is located in the first longitudinal direction, relative to the center of the top surface 241E.

[0553] The first side corresponds to the boundary between the top surface 241E and the first side surface 213A.

[0554] The second side is located in the second longitudinal direction, relative to the center of the top surface 241E.

[0555] The second side corresponds to the boundary between the top surface 241E and the second side surface 213B.

[0556] The top surface 241E has a different structure in the protrusion 240 of the first front end undulation 230A and the protrusion 240 of the second front end undulation 230B.

[0557] Regarding the top surface 241E of the protrusion 240 of the first front end undulation 230A, in the height direction, the first side is located in the first height direction relative to the second side.

[0558] The top surface 241E of the protrusion 240 of the first front end undulation 230A is inclined in such a way that it is oriented toward the first longitudinal direction in the longitudinal direction and toward the first height direction in the height direction.

[0559] Regarding the top surface 241E of the protrusion 240 of the second front end undulation portion 230B, in the height direction, the second side is located in the first height direction relative to the first side.

[0560] The top surface 241E of the protrusion 240 of the second front end undulation 230B is inclined in a manner that it is oriented toward the second longitudinal direction in the longitudinal direction and toward the first height direction in the height direction.

[0561] The first limiting fitting portion includes a first main body undulation portion 130A and a first front end undulation portion 230A.

[0562] The undulations 130A and 230A have the following relationship.

[0563] The third side 141C faces the third side 241C.

[0564] The third side 141C is parallel to the third side 241C.

[0565] The fourth side 141D faces the fourth side 241D.

[0566] The fourth side 141D is parallel to the fourth side 241D.

[0567] Bottom surface 141E faces top surface 241E.

[0568] The bottom surface 141E is parallel to the top surface 241E.

[0569] The first limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first lateral direction through the relationship between the third side surface 141C and the third side surface 241C.

[0570] The first limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the second lateral direction through the relationship between the fourth side surface 141D and the fourth side surface 241D.

[0571] The first limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first longitudinal direction through the relationship between the bottom surface 141E and the top surface 241E.

[0572] The second limiting fitting part includes a second main body undulation part 130B and a second front end undulation part 230B.

[0573] The undulations 130B and 230B have the following relationship.

[0574] The third side 141C faces the third side 241C.

[0575] The third side 141C is parallel to the third side 241C.

[0576] The fourth side 141D faces the fourth side 241D.

[0577] The fourth side 141D is parallel to the fourth side 241D.

[0578] Bottom surface 141E faces top surface 241E.

[0579] The bottom surface 141E is parallel to the top surface 241E.

[0580] The second limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first transverse direction through the relationship between the third side surface 141C and the third side surface 241C.

[0581] The second limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the second lateral direction through the relationship between the fourth side surface 141D and the fourth side surface 241D.

[0582] The second limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the second longitudinal direction through the relationship between the bottom surface 141E and the top surface 241E.

[0583] In the illustrated example, the joint 300 includes a fixing part 340.

[0584] The fixing part 340 includes the adhesive part 350.

[0585] The adhesive portion 350 includes a layer of adhesive.

[0586] The adhesive portion 350 is provided, for example, between the concave surface 141 of the recess 140 and the surface 241 of the convex portion 240.

[0587] (Ninth Implementation)

[0588] The joint 10 of the ninth embodiment is constructed based on the second embodiment.

[0589] Figure 14 as well as Figure 15 An example of the joint 10 is shown.

[0590] In the joint 10 of the ninth embodiment, the structure of the recess 140 of the main body undulation 130 and the structure of the protrusion 240 of the front end undulation 230 differ from those of the previous embodiment. Other structures of the joint 10 of the ninth embodiment are shared with those of the previous embodiment.

[0591] Figure 14 The front view of the joint 10 is shown.

[0592] Figure 15 A cross-sectional view of the joint 300, parallel to the first reference plane, is shown through the joint 300.

[0593] The form of the restricted construction 330 is the second form.

[0594] The limiting structure 330 includes, for example, a plurality of third limiting fittings.

[0595] In one example, multiple third-limiting interlocking parts are spaced apart and arranged laterally.

[0596] The recess 140 has a space 142 that is a hole.

[0597] In the first example, the configuration space 142 does not extend through the main body 100.

[0598] In the second example, the configuration space 142 extends through the main body 100.

[0599] In the illustrated example, the configuration space 142 is cylindrical in shape. The configuration space 142 does not extend through the main body 100.

[0600] The recess 140 includes the opening 143.

[0601] The opening 143 includes a top opening 143C.

[0602] The concave surface 141 of the recess 140 includes an inner circumferential surface 141F and a bottom surface 141E.

[0603] The inner circumferential surface 141F specifies the configuration space 142.

[0604] The inner circumferential surface 141F is a curved surface.

[0605] The bottom surface 141E is located in the second height direction relative to the configuration space 142.

[0606] The bottom surface 141E is connected to the inner circumferential surface 141F.

[0607] The bottom surface 141E is a plane.

[0608] The bottom surface 141E is parallel to the first reference surface.

[0609] The convex part 240 is a cylinder.

[0610] In the example shown, the protrusion 240 is a cylinder.

[0611] The surface 241 of the protrusion 240 includes an outer peripheral surface 241F and a top surface 241E.

[0612] The outer peripheral surface 241F is a curved surface.

[0613] The top surface 241E is located in the second height direction relative to the outer peripheral surface 241F.

[0614] The top surface 241E is connected to the outer peripheral surface 241F.

[0615] The top surface 241E is a plane.

[0616] The top surface 241E is parallel to the first reference surface.

[0617] The third limiting fitting part includes a main body undulation part 130 and a front end undulation part 230.

[0618] The undulations 130 and 230 have the following relationship.

[0619] The inner circumferential surface 141F faces the outer circumferential surface 241F.

[0620] Bottom surface 141E faces top surface 241E.

[0621] The third limiting fitting portion restricts the movement of the front end portion 200 relative to the main body portion 100 in the first longitudinal direction, the second longitudinal direction, the first transverse direction, and the second transverse direction through the relationship between the inner peripheral surface 141F and the outer peripheral surface 241F.

[0622] In the illustrated example, the joint 300 includes a fixing part 340.

[0623] The fixing part 340 includes the adhesive part 350.

[0624] The adhesive portion 350 includes a layer of adhesive.

[0625] The adhesive portion 350 is provided, for example, between the inner peripheral surface 141F of the recess 140 and the outer peripheral surface 241F of the protrusion 240.

[0626] (Tenth Implementation)

[0627] The joint 10 of the tenth embodiment is constructed based on the fourth embodiment.

[0628] Figures 16-22 An example of the joint 10 is shown.

[0629] Figure 16 A three-dimensional view showing the joint 10.

[0630] Figure 17 This shows the front view of the joint 10.

[0631] Figure 18 This shows a side view of the joint 10.

[0632] The coupling 10 is, for example, the blade of a centerless grinding device.

[0633] The main body 100 and the front end 200 are, for example, thin plates.

[0634] The first side surface 113A of the main body 100 includes surface F11, surface F12 and surface F13.

[0635] Surface F11 is connected to top surface 111.

[0636] Face F11 is a plane.

[0637] Surface F11 is parallel to the second reference plane.

[0638] Surface F12 is located in the second height direction relative to surface F11.

[0639] Face F12 is a plane.

[0640] Surface F12 is inclined relative to surfaces F11 and F13.

[0641] Surface F12 intersects with the second reference surface.

[0642] Surface F13 is connected to bottom surface 112.

[0643] Face F13 is a plane.

[0644] Surface F13 is parallel to the second reference plane.

[0645] The dimension of the main body 100 in the longitudinal direction is referred to as the "main body thickness".

[0646] The thickness of the main body portion corresponding to surface F11 of the first side surface 113A and the second side surface 113B is referred to as the "thickness of the first main body portion".

[0647] The thickness of the main body portion corresponding to surface F12 of the first side surface 113A and the second side surface 113B is referred to as the "second main body portion thickness".

[0648] The thickness of the main body corresponding to surface F13 of the first side 113A and the second side 113B is referred to as the "third main body thickness".

[0649] In the example shown, the thickness of the main body is determined as follows.

[0650] The thickness of the first main body is constant in the height direction.

[0651] The thickness of the second main body increases in the height direction as it moves toward the second height direction.

[0652] The thickness of the third main body is constant in the height direction.

[0653] The thickness of the first main body is included in the range above the first reference thickness.

[0654] The first reference thickness is selected, for example, from 0.1mm, 0.3mm, and 0.5mm.

[0655] The thickness of the first main body is included in the range below the second reference thickness.

[0656] The second reference thickness is greater than the first reference thickness.

[0657] The second reference thickness can be selected from, for example, 1.5mm, 5mm, and 10mm.

[0658] The dimension of the front end 200 in the longitudinal direction is referred to as the "front end thickness".

[0659] In the example shown, the thickness of the front end is determined as follows.

[0660] The thickness of the front end is constant in the height direction.

[0661] The thickness of the front end is equal to the thickness of the first main body.

[0662] The thickness of the front end is included in the range above the third reference thickness.

[0663] The third reference thickness can be selected from, for example, 0.1 mm, 0.3 mm, or 0.5 mm.

[0664] The thickness of the front end is included in the range below the fourth reference thickness.

[0665] The fourth reference thickness is greater than the third reference thickness.

[0666] The fourth reference thickness can be selected from, for example, 1.5mm, 5mm, and 10mm.

[0667] Figure 19 This is the front view of the main body 100.

[0668] The main body 100 includes multiple main body undulating parts 130.

[0669] The structure of the main body undulation 130 is based on the structure of the main body undulation 130 in the implementation of the premise.

[0670] The distance between the top surface 111 of the main body 100 and the bottom surface 141E of the recess 140 in the height direction is called the "recess depth".

[0671] The depth of the recess is included in the range above the first reference depth.

[0672] The first reference depth can be selected from, for example, 0.5mm, 1.0mm, and 1.5mm.

[0673] The depth of the recess is included in the range below the second reference depth.

[0674] The second reference depth is greater than the first reference depth.

[0675] The second reference depth can be selected from, for example, 2.0mm, 3.0mm, and 5.0mm.

[0676] Figure 20 This shows the front view of the front section 200.

[0677] The front end portion 200 includes a plurality of front end undulations 230.

[0678] The structure of the front end undulation 230 is based on the structure of the front end undulation 230 in the prior embodiment.

[0679] The distance between the bottom surface 212 of the front end 200 and the top surface 241E of the protrusion 240 in the height direction is called the "protrusion height".

[0680] The height of the protrusion is included in the range above the first reference height.

[0681] The first reference height can be selected from, for example, 0.5mm, 1.0mm, or 1.5mm.

[0682] The height of the protrusion is included in the range below the second reference height.

[0683] The second reference height is greater than the first reference height.

[0684] The second reference height can be selected from, for example, 2.0mm, 3.0mm, and 5.0mm.

[0685] Figure 21 This is a top view of the main body 100.

[0686] The datum line parallel to the longitudinal direction on the first datum plane is called the "datum line LL".

[0687] The straight line on the first reference plane, including the third side 141C, is called "straight line LM3".

[0688] The straight line on the first reference plane, including the fourth side 141D, is called "straight line LM4".

[0689] The straight line LM3 intersects the baseline LL.

[0690] The angle between the straight line LM3 and the baseline LL is called the "angle TM3".

[0691] The straight line LM4 intersects the baseline LL.

[0692] The angle between the straight line LM4 and the baseline LL is called the "angle TM4".

[0693] The angles TM3 and TM4 formed by each are within the range above the first reference angle.

[0694] The first reference angle is selected, for example, from 1°, 2°, and 3°.

[0695] The angles TM3 and TM4 formed by each are included in the range below the second reference angle.

[0696] The second reference angle is greater than the first reference angle.

[0697] The second reference angle is selected from, for example, 8°, 9°, and 10°.

[0698] The relationship between the angles TM3 and TM4 is illustrated.

[0699] In the first example, the angle TM3 is equal to the angle TM4.

[0700] In the second example, the angle TM3 is greater than the angle TM4. In the third example, the angle TM3 is less than the angle TM4.

[0701] Figure 22 This shows a bottom view of the front end 200.

[0702] The straight line of the first reference plane, including the third side 241C, is called "straight line LN3".

[0703] The straight line including the fourth side 241D of the first reference plane is called "straight line LN4".

[0704] The straight line LN3 intersects the baseline LL.

[0705] The angle between the straight line LN3 and the baseline LL is called the "angle TN3".

[0706] The straight line LN4 intersects the baseline LL.

[0707] The angle between the straight line LN4 and the baseline LL is called the "angle TN4".

[0708] The angles TN3 and TN4 formed by each are included in the range above the third reference angle.

[0709] The third reference angle can be selected from, for example, 1°, 2°, or 3°.

[0710] The angles TN3 and TN4 formed by each are included in the range below the fourth reference angle.

[0711] The fourth reference angle is greater than the third reference angle.

[0712] The fourth reference angle can be selected from, for example, 8°, 9°, or 10°.

[0713] The relationship between the angles TN3 and TN4 is illustrated.

[0714] In the first example, the angle TN3 is equal to the angle TN4.

[0715] In the second example, the angle TN3 is greater than the angle TN4.

[0716] In the third example, the angle TN3 is smaller than the angle TN4.

[0717] (Eleventh Implementation Method)

[0718] The joint 10 of the eleventh embodiment is constructed based on the third embodiment.

[0719] The structure of the joint 10 in the eleventh embodiment is equivalent to a structure in which the concave-convex relationship between the main body undulation 130 and the front end undulation 230 in any of the fourth to tenth embodiments has been changed.

[0720] The protrusion 150 of the main body undulation 130 includes the structure of the protrusion 240 of the front end undulation 230 according to any one of the fourth to tenth embodiments.

[0721] The recess 250 of the front end undulation 230 includes the structure of the recess 140 of the main body undulation 130 according to any one of the fourth to tenth embodiments.

[0722] (Effect)

[0723] According to the exemplified joint 10, the following effects are obtained, for example.

[0724] In one example, the joint 10 includes a fitting portion 310.

[0725] Compared to cases where the main body 100 and the front end portion 200 are joined by metallurgical bonding, deformation of the joint 10 due to heat is less likely to occur. This, for example, helps the front end portion 200 to function well on the object.

[0726] In one example, the joint 10 includes an insertion structure 320.

[0727] When the front end portion 200 is fitted into the main body portion 100, the direction of relative movement is defined by the insertion structure 320, thereby improving the workability related to the engagement of the main body portion 100 and the front end portion 200.

[0728] In one example, the joint 10 includes a limiting structure 330.

[0729] In the mating state, the relative movement of the main body 100 and the front end 200 in the intersecting direction is limited by the limiting structure 330, so the position of the front end 200 relative to the main body 100 is stable in the mating state.

[0730] In one example, the connector 10 includes a first limiting engagement portion and a second limiting engagement portion. The first limiting engagement portion includes a first body undulation portion 130A and a first front end undulation portion 230A. The second limiting engagement portion includes a second body undulation portion 130B and a second front end undulation portion 230B.

[0731] Appropriately restrict the relative movement between the main body 100 and the front end 200.

[0732] In one example, the first main body undulation 130A includes a recess 140 or a convex portion 150. The first front end undulation 230A includes a convex portion 240 or a recess 250.

[0733] It can easily form the first main body undulation 130A and the first front end undulation 230A.

[0734] In one example, the second main body undulation 130B includes a recess 140 or a convex portion 150. The second front end undulation 230B includes a convex portion 240 or a recess 250.

[0735] It can easily form the second main body undulation 130B and the second front end undulation 230B.

[0736] In one example, the side surface of the recess 140 or the convex 150 of the first main body undulation 130A includes an inclined surface. The side surface of the convex 240 or the recess 250 of the first front end undulation 230A includes an inclined surface.

[0737] Appropriately restrict the relative movement between the main body 100 and the front end 200.

[0738] In one example, the side surface of the recess 140 or the convex 150 of the second main body undulation portion 130B includes an inclined surface. The side surface of the convex 240 or the recess 250 of the second front end undulation portion 230B includes an inclined surface.

[0739] Appropriately restrict the relative movement between the main body 100 and the front end 200.

[0740] In one example, the bottom surface of the recess 140 or the top surface of the protrusion 150 of the first main body undulation 130A includes an inclined surface. The top surface of the protrusion 240 or the bottom surface of the recess 250 of the first front end undulation 230A includes an inclined surface.

[0741] Appropriately restrict the relative movement between the main body 100 and the front end 200.

[0742] In one example, the bottom surface of the recess 140 or the top surface of the protrusion 150 of the second main body undulation 130B includes an inclined surface. The top surface of the protrusion 240 or the bottom surface of the recess 250 of the second front end undulation 230B includes an inclined surface.

[0743] Appropriately restrict the relative movement between the main body 100 and the front end 200.

[0744] In one example, the joint 300 includes an adhesive portion 350 that bonds the main body fitting portion 120 to the front end fitting portion 220.

[0745] The relative movement between the main body 100 and the front end 200 is more strongly restricted.

[0746] It should be noted that the form of the joints related to this invention is not limited to the descriptions of the above embodiments. The joints related to this invention may take forms different from those exemplified in the embodiments. As examples, forms in which a part of the structure of each embodiment is replaced, modified, or omitted, or forms in which new structures are added to each embodiment, can be cited.

Claims

1. A joint comprising: The front end acts on the object; The main body supports the front end portion; as well as The joining portion joins the main body portion to the front end portion. The joint includes a fitting portion. The fitting portion includes: a main fitting portion disposed on the main body portion and a front fitting portion disposed on the front end portion; an insertion structure configured to allow the main fitting portion to engage with the front fitting portion by relative movement of the main body portion and the front end portion in the height direction; and a limiting structure configured to limit relative movement of the main body portion and the front end portion in an intersecting direction intersecting the height direction while the main fitting portion and the front fitting portion are engaged. The main body fitting portion includes a first main body undulating portion and a second main body undulating portion. The front-end fitting portion includes a first front-end undulating portion corresponding to the first main body undulating portion and a second front-end undulating portion corresponding to the second main body undulating portion. The limiting structure includes a first limiting fitting part and a second limiting fitting part. The intersection direction includes a first intersection direction and a second intersection direction. The second intersection direction is the opposite direction to the first intersection direction. The first limiting fitting portion includes a first body undulation portion and a first front end undulation portion configured to limit the relative movement of the main body portion and the front end portion in the first intersecting direction. The second limiting fitting portion includes a second main body undulation portion and a second front end undulation portion configured to limit the relative movement of the main body portion and the front end portion in the second intersecting direction. The first main body undulating portion includes a concave portion or a convex portion. The first front end undulating portion includes a convex portion or a concave portion. The concave or convex portion of the first main body includes a side surface. The side surface of the concave or convex portion of the first main body includes an inclined surface. The convex or concave portion of the first front end undulating portion includes the side surface. The side surface of the convex or concave portion of the first front end undulating portion includes an inclined surface. The joining portion includes an adhesive portion that bonds the main body fitting portion to the front end fitting portion. The main body and the front end are thin plates.

2. The joint according to claim 1, wherein, The first main body undulating portion includes a concave portion, The recessed portion of the first main body undulating part includes a bottom surface. The bottom surface of the concave portion of the first main body includes an inclined surface. The first front end undulating portion includes a convex portion. The convex portion of the first front end undulating portion includes a top surface. The top surface of the convex portion of the first front end undulating portion includes an inclined surface.

3. The joint according to claim 1, wherein, The first main body undulating portion includes a convex portion. The convex portion of the first main body undulating part includes a top surface. The top surface of the convex portion of the first main body undulating portion includes an inclined surface. The first front end undulating portion includes a recess. The recessed portion of the first front end undulating part includes a bottom surface. The bottom surface of the concave portion of the first front end undulation portion includes an inclined surface.

4. The joint according to any one of claims 1 to 3, wherein, The second main body undulating portion includes a concave portion or a convex portion. The second front end undulation portion includes a convex portion or a concave portion.

5. The joint according to claim 4, wherein, The concave or convex portion of the second main body includes the side surface. The side of the concave or convex portion of the second main body includes an inclined surface. The convex or concave portion of the second front end undulating portion includes the side surface. The side of the convex or concave portion of the second front end undulation portion includes an inclined surface.

6. The joint according to claim 4, wherein, The second main body undulating portion includes a concave portion. The concave portion of the second main body undulating part includes a bottom surface. The bottom surface of the concave portion of the second main body undulating part includes an inclined surface. The second front end undulating portion includes a convex portion. The convex portion of the second front end undulating portion includes a top surface. The top surface of the convex portion of the second front end undulating portion includes an inclined surface.

7. The joint according to claim 4, wherein, The second main body undulating portion includes a convex portion. The convex portion of the second main body undulating part includes a top surface. The top surface of the convex portion of the second main body undulating part includes an inclined surface. The second front end undulating portion includes a concave portion. The concave portion of the second front end undulating part includes a bottom surface. The bottom surface of the concave portion of the second front end undulating portion includes an inclined surface.

Images