JP2005106081A - Clamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp capable of surely assembling and holding a fitting part to the predetermined fitting position even if a load is applied to the fitting part in a direction for displacing the fitting part from the predetermined fitting position. <P>SOLUTION: The clamp 30 is made of an elastic material, and structured to be fitted to a barrel part 21 of an injector 13 assembled between a cylinder head 11 and a delivery pipe 12. The clamp 30 is provided with a pair of a right and a left arm parts for elastically pinching a peripheral surface of the barrel part 21 of the injector 13. Each of the arms has a plurality of beam parts arranged with the predetermined interval in the axial direction of the injector 13. With this structure, the injector 13 can be pushed toward the cylinder head 11 between the delivery pipe 12, and assembled for holding, while securing a pre-compression load resisting a load applied to the injector 13 in the axial direction and based on the combustion pressure from a combustion chamber 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a clamp used for attaching and holding mounting parts.

Conventionally, for example, in industrial equipment such as automobiles, a clamp is used as a kind of jig for assembling and holding a mounting part at a predetermined mounting position. As an example, when an injector (mounting part) for injecting and supplying fuel to an internal combustion engine (engine) is assembled between a delivery pipe and a cylinder head, a clamp as described in Patent Document 1 is used. . The clamp described in Patent Document 1 is integrally formed by a leaf spring made of a thin plate metal, and includes a first arm portion (upper arm portion) having a substantially U shape in plan view, and a first arm portion. A second arm part (lower arm part) which is located below the arm part and has a substantially U shape in plan view, and the central parts of the first arm part and the second arm part in the vertical direction And a vertical plate-like connecting portion to be connected. And about the usage mode of this clamp, after assembling an injector between a delivery pipe and a cylinder head, while a 1st arm part clamps the outer peripheral surface of the attachment end part of a delivery pipe elastically, 2nd The clamp is engaged with the delivery pipe and the injector from the side so that the arm portion elastically clamps the outer peripheral surface of the barrel portion of the injector. Therefore, according to the clamp of Patent Document 1, the injector as an attachment part is prevented from coming off from the delivery pipe and prevented from rotating by the elastic clamping force of the first arm portion and the second arm portion. It can be assembled and held at a predetermined mounting position between the cylinder head.
JP-A-9-100780 (Claim 1, FIG. 1 and FIG. 2)

  However, the clamp described in Patent Document 1 has the following problems. That is, in general, in an industrial device, vibration, a load, or the like may be applied to each component as the device is driven. For example, an injector that is assembled and held between a delivery pipe and a cylinder head is also subjected to a high combustion pressure from the combustion chamber in the cylinder head, particularly when the internal combustion engine (engine) is started. , It acts as a load for moving the injector in the direction of displacement from the mounting position. However, in such a case, a clamp that has only an engagement relationship in which the second arm portion elastically clamps the outer peripheral surface of the barrel portion of the injector with respect to the injector is subjected to the upward load. Oppositely, the injector could not be held in its mounting position.

  That is, in the clamp, the first arm portion elastically holds the outer peripheral surface of the attachment end portion of the delivery pipe, and the second arm portion elastically holds the outer peripheral surface of the barrel portion of the injector. It can be said that the relative position of the injector with respect to the delivery pipe plays a function of preventing displacement. However, the relative positional relationship with the cylinder head did not particularly have a function of pressing and holding the injector toward the cylinder head against the upward load based on the combustion pressure. Therefore, an upward load is propagated to the injector at each start-up (that is, frequently), and the injector vibrates between the delivery pipe and the cylinder head due to the propagated load. As a result, the fuel injection side end of the injector There is a possibility that the seal structure between the (lower end) and the injector mounting hole of the cylinder head into which the end is inserted cannot be secured. In other words, the mounting component (injector) is displaced from the originally assumed mounting position in the relative positional relationship with another component or member (cylinder head) to be assembled, so that the mounting component There was a problem that the original function in the (injector) was hindered.

  The present invention has been made in view of such circumstances, and its purpose is that even when a load is applied in the direction of displacement from a predetermined mounting position originally assumed for the mounting component, It is an object of the present invention to provide a clamp capable of securely assembling and holding a mounting component at a predetermined mounting position against the load.

  In order to achieve the above object, the invention according to claim 1 has left and right arm portions that elastically contact and engage with the side surface of the mounting part and a connecting portion that connects the both arm portions. Then, with the left and right arm portions engaged with the side surfaces of the attachment part, the attachment part is restricted from moving from the attachment position to the predetermined axial direction perpendicular to the left-right direction with respect to the predetermined attachment position. In the clamp that can be assembled and held, the left and right arm portions each have a plurality of parallelly extending beam portions arranged at predetermined intervals in the axial direction, and the beam portions in each row Formed so as to meander in the axial direction, the connecting portions are at least one row of the beam portions of each row in the right arm portion and the left arm portion, and the same row in the axial direction. It is formed as a connecting beam part that connects the beam parts that become positions At least the left and right arm portion of one of said left and right arms and the connecting portion is summarized in that which is formed of an elastic material.

The gist of the invention described in claim 2 is that, in the clamp according to claim 1, the right arm portion and the left arm portion are formed so as to be symmetrical with each other.
Further, the invention according to claim 3 is the clamp according to claim 1 or 2, wherein the right arm portion and the left arm portion are respectively connected to each other in a row of beam portions via a connecting beam portion. It is a summary.

  Further, the invention according to claim 4 is the clamp according to any one of claims 1 to 3, wherein the left and right arm portions are provided on the side surfaces of the attachment parts. The gist is that a positioning portion is formed that engages with a predetermined portion of the mounting part in a positioning manner when engaged.

  The invention according to claim 5 is the clamp according to any one of claims 1 to 4, wherein the attachment component includes the first attachment portion in which the attachment position is set and the first attachment portion. One end of the mounting component is attached to the first mounting portion between the mounting position of the first mounting portion and the second mounting portion located at a certain distance in the axial direction from the mounting position. In the state where the other end is attached to the second attachment portion, and the left and right arm portions are engaged with the side surfaces of the attachment parts, the left and right arm portions are respectively Of the beam portions in the row, the beam portion located closest to the first attachment portion engages and engages with a predetermined portion of the attachment component so as to restrict the movement of the attachment component toward the second attachment portion. On the other hand, the beam part located closest to the second attachment part among the beam parts of each row is the second attachment part with respect to the second attachment part. It is summarized as that from the mounting portion is configured to abutting engagement.

  According to a sixth aspect of the present invention, in the clamp according to the fifth aspect, each arm portion or connecting portion has the second arm portion when the left and right arm portions are engaged with the side surfaces of the attachment parts. The gist is that a positioning portion that engages with a predetermined portion of the mounting portion in a positioning manner is formed.

  According to the present invention, even when a load is applied in a direction in which the mounting part is displaced from the originally assumed predetermined mounting position, the mounting part is reliably placed at the predetermined mounting position against the load. Can be assembled and held, and the original function of the mounting part can be exhibited satisfactorily.

  1 to FIG. 1 show an embodiment in which the present invention is embodied in a clamp used when an injector is assembled between a delivery pipe and a cylinder head in an internal combustion engine (engine) of an automobile which is a kind of industrial equipment. 9 will be described.

  As shown in FIG. 1, an internal combustion engine 10 of an automobile according to the present embodiment includes a cylinder head 11, a fuel supply delivery pipe 12 fixedly disposed at an upper position spaced apart from the cylinder head 11, and a cylinder A fuel injection injector (attachment part) 13 is provided between the head 11 and the delivery pipe 12. A combustion chamber 14 is formed in the cylinder head 11 and an attachment hole 15 serving as an attachment position of the injector 13 is formed so as to communicate with the combustion chamber 14. Therefore, in this embodiment, the cylinder head 11 in which the mounting hole 15 is formed (more specifically, the site where the mounting hole 15 is formed) attaches one end (lower end) of the injector 13 as a mounting part. 1 as an attachment portion. Further, in the mounting hole 15, a small diameter step portion 16 and a large diameter step portion 17 are located on the lower side on the combustion chamber 14 side, and on the upper side on the opposite side of the combustion chamber 14. The large-diameter step portion 17 is formed so as to be positioned.

  Further, the delivery pipe 12 is configured to be fixedly supported at an upper position of the cylinder head 11 via a fixing bolt B as shown in FIG. 1 and corresponds to the mounting hole 15 in the cylinder head 11. An attachment end 18 for attaching the other end (upper end) of the injector 13 is formed at the site, that is, the site located on the central axis of the injector 13. An insertion port (not shown) communicating with the fuel supply passage 19 in the delivery pipe 12 is formed in the lower surface of the attachment end 18 and the outer periphery of the lower end of the attachment end 18 is viewed from the side. One concave portion (predetermined portion) 20 having a rectangular shape is formed. Therefore, in this embodiment, the attachment end 18 in the delivery pipe 12 in which the insertion port is formed is a second attachment portion for attaching the other end (upper end) of the injector 13 as an attachment component.

  On the other hand, the injector 13 is provided with a cylindrical barrel portion 21, and a flange portion 22 is formed on the barrel portion 21 at a portion closer to the lower end portion in the axial direction of the injector 13. Further, a convex portion (predetermined portion) 23 having substantially the same shape as the concave portion 20 formed in the attachment end portion 18 of the delivery pipe 12 is formed on the upper surface side of the flange portion 22. The injector 13 is inserted and supported at the insertion port of the attachment end 18 of the delivery pipe 12 at the upper end (indicated by a broken line in FIG. 1) 24 which is the fuel suction side end, and is also the fuel injection side end. The lower end portion 25 is inserted and supported in the mounting hole 15 of the cylinder head 11 with a gasket 26 interposed between the step portions 16 and 17 for airtightness. In the state where the lower end portion 25 of the injector 13 is inserted and supported in the mounting hole 15, the flange portion 22 is engaged and supported by the large-diameter step portion 17 in the mounting hole 15 via the gasket 26. become. And the clamp 30 of the form shown in FIGS. 2-9 is mounted | worn with respect to the outer peripheral surface of the trunk | drum 21 of the injector 13 assembled | attached between the cylinder head 11 and the delivery pipe 12 as mentioned above.

  The clamp 30 is a leaf spring made of a thin plate metal, and a pre-process clamp 30a punched into a shape as shown in FIG. 3 from a flat spring material is symmetrical with respect to the center line a. Thus, they are integrally formed by bending. Accordingly, the clamp 30 after being bent as shown in FIG. 2 and FIGS. 4 to 9 is the outer peripheral surface (side surface) of the barrel portion 21 when the clamp 30 is mounted on the barrel portion 21 of the injector 13. Left and right arm portions (right arm portion 50 and left arm portion 60) that elastically contact and engage with each other, and a connecting portion 70 that connects right arm portion 50 and left arm portion 60 Is done. 3 to 5, 8, and 9, a pair of left and right broken lines extending in the vertical direction indicate the boundaries between the right arm portion 50, the left arm portion 60, and the connecting portion 70 in the clamp 30. It is attached.

  As can be understood from FIGS. 1 to 9, the right arm 50 has a predetermined interval in the direction of a predetermined axis P that is parallel to the central axis of the injector 13 when the clamp 30 is attached to the injector 13. In this embodiment, a plurality of rows (six rows in this embodiment) of beam portions 35 to 40 are provided. The beam portions 35 to 40 in each row are provided so as to extend in parallel to a direction orthogonal to the axis P direction, and are formed in a meandering manner in the axis P direction. In this embodiment, the row positions of the beam portions 35 to 40 are arranged from the upper side on the delivery pipe 12 side to the lower side on the cylinder head 11 side during assembly shown in FIG. 36 → beam part 37 → beam part 38 → beam part 39 → beam part 40. Hereinafter, in the assembled state shown in FIG. 1, the direction on the delivery pipe 12 side is described as the upper side, and the direction on the cylinder head 11 side is described as the lower side.

  The left arm 60 has a symmetrical shape with respect to the center line a in contrast with the right arm 50. Accordingly, as in the case of the right arm portion 50, a plurality of rows (six rows in this embodiment) of beam portions 41 to 46 are arranged in the predetermined axis P direction at a predetermined interval. Similarly, the beam portions 41 to 46 in each row are provided so as to extend in parallel to a direction orthogonal to the axis P direction, and are formed so as to be serpentine in the axis P direction. Yes. 1 from the upper side on the delivery pipe 12 side to the lower side on the cylinder head 11 side when assembled, the row positions of the beam parts 41 to 46 are the beam part 41 → the beam part 42 → the beam part 43. The beam portions 44 are formed in the order of the beam portions 45, the beam portions 45, and the beam portions 46.

  On the other hand, the connecting portion 70 includes a plurality (four in the present embodiment) of connecting beam portions 31 to 41 that connect the beam portions 35 to 40 and 41 to 46 of each row in the right arm portion 50 and the left arm portion 60. 34. The connecting beam portion 31 connects the beam portion 35 having the uppermost row position in the right arm portion 50 and the beam portion 41 having the uppermost row position in the left arm portion 60. The connecting beam portion 32 has two beam portions 36 and 37 whose row positions are second and third from the top in the right arm portion 50 and two beam portions whose row positions are second and third from the top in the left arm portion 60. The beam portions 42 and 43 are connected. The connecting beam portion 33 has two beam portions 38 and 39 whose row positions are fourth and fifth from the top in the right arm portion 50, and two row portions whose row positions are fourth and fifth from the top in the left arm portion 60. The beam portions 44 and 45 are connected. The connecting beam portion 34 connects the beam portion 40 having the lowest row position in the right arm portion 50 and the beam portion 46 having the lowest row position in the left arm portion 60. That is, the connecting beam portions 31 to 34 are the beam portions 35 to 35 that are in the same row position in the axis P direction with respect to the beam portions 35 to 40 and 41 to 46 in all rows in the right arm portion 50 and the left arm portion 60. 40, 41 to 46 are connected to each other.

  Further, among the connecting beam portions 31 to 34, the delivery beam portion 35, 41 having the uppermost row position in the direction of the axis P is connected to the substantially central portion of the uppermost connecting beam portion 31. A convex portion 47 that can be fitted and locked with the concave portion 20 formed on the attachment end portion 18 of the pipe 12 is formed to protrude upward. Of the connecting beam portions 31 to 34, the lowermost connecting beam portion 34 that connects the beam portions 40, 46 having the lowest row position in the direction of the axis P, A concave portion 48 that can be fitted and locked with the convex portion 23 formed on the flange portion 22 of the injector 13 is formed. The convex portion 47 and the concave portion 48 are formed so as to be positioned on the same line along the axis P direction. In the present embodiment, the convex portion 47 and the concave portion 48 constitute a positioning portion. Further, of the connecting beam portions 31 to 34, the remaining two connecting beam portions 32 and 33 located on the inner side are provided with meat removal portions 32a, 32b, 33a, and 33b at the center portions of the upper and lower sides, respectively. Each of the connecting beam portions 32 and 33 has a constricted shape at the center of each of the connecting beam portions 32 and 33 due to the formation of the hollow portions 32a, 32b, 33a and 33b.

  As understood from FIGS. 2 and 3, a slit 80 made of a long hole is formed between the beam portions 35 and 41 and the beam portions 36 and 42. Similarly, slits 81 and 82 each having a long hole are formed between the beam portions 37 and 43 and the beam portions 38 and 44 and between the beam portions 39 and 45 and the beam portions 40 and 46, respectively. Has been. On the other hand, a slit 83 made of a notch is formed between the beam portion 36 and the beam portion 37. Similarly, slits 84 formed of notches are also provided between the beam 38 and the beam 39, between the beam 42 and the beam 43, and between the beam 44 and the beam 45. 85 and 86 are formed. That is, the beam portions 35 to 40 and 41 to 46 are arranged in the axis P direction at a predetermined interval by the slits 80 to 86.

Next, a method for manufacturing the clamp 30 will be described.
First, the pre-processing clamp 30a having the shape shown in FIG. 3 is punched from a thin steel plate (flat spring material) by a known punching device having a punch and a die. As can be understood from FIG. 3, in the pre-process clamp 30a, three elongated holes extending in a direction orthogonal to the center line a are formed side by side along the center line a, and from the left side and the right side. Two notches are formed with a notch depth not reaching the center line a toward the center line a. These long holes and notches become the slits 80 to 86, respectively, when the pre-processing clamp 30a is bent into the clamp 30, and the slits 80 to 82 are constituted by the long holes. The slits 83 to 86 are formed by the notches.

  Next, a rod-shaped mandrel (not shown) having a substantially horseshoe-shaped cross-sectional outer shape serving as a core material for bending is disposed at a predetermined position. As the rod-shaped mandrel in this case, a rod-shaped mandrel having a columnar protrusion formed on the outer side surface (position to be a horseshoe-shaped base end portion) at the axial center is used. Then, the center line a of the pre-processing clamp 30a is collinear with the axis of the rod-shaped mandrel, so that the central portion of the slit 81 (the beveled portion 32b of the connecting beam portion 32 and the beveled portion of the connecting beam portion 33) The portion surrounded by 33a is fitted to the cylindrical protrusion of the mandrel. Then, the entire pre-processing clamp 30a is bent in such a direction as to warp backward from the left and right sides in FIG. Then, a clamp 30 having a substantially horseshoe-shaped cross section as shown in FIG. 2 (and FIG. 8) is three-dimensionally formed. Thereafter, heat treatment is performed to impart spring characteristics to the three-dimensionally formed clamp 30. Then, the clamp 30 has a radial spring characteristic in which the left and right arm portions 50, 60 are elastically abuttingly engaged with the outer peripheral surface of the barrel portion 21 of the injector 13 as a mounting component with a predetermined pressure, and the arm portions. 50 and 60 beam portions 35 to 40 and 41 to 46 are provided with an axial spring characteristic that opposes the contraction load in the axis P direction. In this way, the clamp 30 in which the left and right arm portions 50 and 60 and the connecting portion 70 are made of an elastic material is manufactured.

Next, the usage method of the clamp 30 comprised as mentioned above is demonstrated.
First, the clamp 30 is fitted to the body portion 21 of the injector 13 and the upper end portion 24 so that the concave portion 48 formed on the connecting beam portion 34 of the clamp 30 and the convex portion 23 formed on the flange portion 22 of the injector 13 are fitted. Install from the side. At this time, the left and right arm portions 50 and 60 of the clamp 30 are elastically contacted and engaged with the body portion 21 of the injector 13. Further, if the operation of attaching the clamp 30 to the body portion 21 of the injector 13 is made to be fitted from the upper end portion 24 side of the injector 13 by, for example, an arm of a robot, the attachment operation can be performed satisfactorily. Then, the injector 13 in the state where the clamp 30 is mounted is fitted so that the convex portion 47 formed on the connecting beam portion 31 of the clamp 30 and the concave portion 20 of the attachment end portion 18 of the delivery pipe 12 are fitted. Further, the injector 13 is assembled to the attachment end 18 of the delivery pipe 12 so that the upper end 24 of the injector 13 is fitted into the insertion port of the attachment end 18. Finally, the delivery pipe 12 is assembled and fixed to the cylinder head 11 via the fixing bolt B so that the lower end 25 of the injector 13 is fitted into the mounting hole 15 of the cylinder head 11.

  Then, the clamp 30 is in a state in which the convex portion 47 is fitted with the concave portion 48 on the delivery pipe 12 side so that the rotation about the axis P is prevented with respect to the attachment end portion 18 of the delivery pipe 12. It will be in the state where it was attached and supported. Similarly, the injector 13 is fitted with the concave portion 48 on the clamp 30 side, and similarly, the injector 13 is prevented from rotating around the axis P with respect to the attachment end portion 18 of the delivery pipe 12. It will be in the state supported by attachment. The injector 13 is configured so that the mounting end 18 of the delivery pipe 12 and the mounting hole 15 of the cylinder head 11 are held in a state where the outer peripheral surface of the body 21 is held between the left and right arms 50 and 60 of the clamp 30. The center axis is assembled along the axis P. In the assembled state, the beam portions 35 and 41 whose uppermost row positions are in contact with the outer peripheral edge of the lower end portion of the attachment end portion 18, while the beam portions 40 and 46 whose lowermost row positions are the injectors. It will be in the state contact | abutted with 13 collar parts (engagement site | part) 22. Therefore, in the assembled state, even when the combustion pressure from the combustion chamber 14 of the cylinder head 11 acts as a load that moves the injector 13 upward (that is, in the direction of displacement), the axial spring characteristics of the clamp 30 The injector 13 is assembled and held in a state in which the lower end portion 25 is inserted and supported in the attachment hole 15 (that is, a state where the injector 13 is supported at a predetermined attachment position originally assumed).

Therefore, in this embodiment, the following effects can be obtained.
(1) In the clamp 30 made of an elastic material, the beam portions 35 to 40 and 41 to 46 in each row of the pair of left and right arm portions (the right arm portion 50 and the left arm portion 60) are connected in a meandering manner in the axis P direction. The connecting portion 70 that connects the left and right arm portions 50 and 60 is also composed of connecting beam portions 31 to 34 that connect the beam portions in the same row position of the both arm portions 50 and 60. ing. Accordingly, the clamp 30 is provided with an axial spring characteristic that opposes the contraction load in the direction of the axis P along the central axis of the injector (mounting part) 13. In the assembled state shown in FIG. It becomes possible to press and hold downward (cylinder head 11 side) in opposition to the upward load due to the high combustion pressure from the combustion chamber 14. Therefore, the injector 13 can be reliably assembled and held in the mounting hole 15 of the cylinder head 11 between the mounting end 18 of the delivery pipe 12 and facing the upward load generated every time the engine is started.

  (2) Since the left and right arm portions 50 and 60 including the respective beam portions 35 to 40 and 41 to 46 are formed and arranged in a bilaterally symmetric shape, the clamp 30 is located above the combustion pressure from the combustion chamber 14 ( The load is not offset with respect to the load in the direction of the axis P). That is, it is possible to stably hold the injector 13 in a predetermined mounting position state in which the central axis is along the axis P direction against the upward load based on the combustion pressure. Therefore, there is no possibility that the lower end 25 of the injector 13 will be twisted in the mounting hole 15.

  (3) The plurality of rows of beam portions 35 to 40 and 41 to 46 that the right arm portion 50 and the left arm portion 60 respectively have are connected to each other by connecting beam portions 31 to 34. Therefore, for example, when bending from the state of the clamp 30a before processing in FIG. 3 to the clamp 30 after processing in FIG.

  (4) A concave portion 48 as a positioning portion is formed in the central portion of the connecting beam portion 34 at the lowermost end of the clamp 30 so as to be fitted with the convex portion 23 formed on the flange portion 22 of the injector 13. It has become. Accordingly, when the clamp 30 is mounted on the body portion 21 of the injector 13, the concave portion 48 can be fitted into the convex portion 23 to perform a positioning function, and the mounting operation of the clamp 30 to the injector 13 is easy. Can be done.

  (5) At the center of the connecting beam 31 at the uppermost end of the clamp 30, a convex portion 47 is formed so as to protrude upward, and is fitted to the concave portion 20 formed on the attachment end portion 18 of the delivery pipe 12. It is supposed to be. Therefore, when the injector 13 with the clamp 30 attached is assembled to the attachment end 18 of the delivery pipe 12, the convex portion 47 can be fitted into the concave portion 20 to perform a positioning function, and the attachment end of the injector 13 can be achieved. The alignment operation to the part 18 can be performed quickly and easily. Moreover, when this convex part 47 and the recessed part 20 are fitted, the clamp 30 is the center axis line (and axis line P) direction of the injector 13 between the lower end part of the attachment end part 18 and the collar part 22 of the injector 13. The injector 13 can be assembled and held in a state in which a precompression load is secured.

  (6) Although vibration from the engine side is propagated to the injector 13 assembled in the internal combustion engine 10 of the automobile after the engine is started, the left and right arm portions 50 and 60 are elastic to the body portion 21 of the injector 13. As described above, the axial spring characteristic is imparted to the clamp 30 that abuts and engages. Therefore, since the clamp 30 having this axial spring characteristic absorbs the vibration propagated to the injector 13, in an experimental comparison with the case where the clamp 30 is not mounted on the injector 13, the operating noise of the engine is several decibels (for example, (3 dB or so) is also effective.

The above embodiment may be changed to another embodiment (another example) as follows.
In the present embodiment, the overall shape of the clamp 30 is symmetrical with respect to the center line a (see FIG. 3), but it is not necessarily symmetrical. Further, the bending shapes of the beam portions 35 to 40 and 41 to 46 in the arm portions 50 and 60 are set to have a substantially horseshoe shape (see FIG. 8) in the present embodiment, but are shown in FIG. Thus, the cross-sectional shape may be a C-shape (FIG. 10A), a U-shaped cross-section (FIG. 10B), a substantially C-shaped cross-section (FIG. 10C), or the like. The left-right symmetry and the bending shape of the beam portion in the clamp 30 are formed in accordance with the shape of a member (attachment part) to which the clamp 30 is attached and can be changed as appropriate.

  The shape of the pre-processing clamp 30a in the above embodiment may be a shape in which the beam portions of each row are simply meandered and connected in series as shown in FIG. Also in this case, a pre-process clamp 130a having left and right arm portions 50, 60 and a connecting portion 70 is provided.

  -The shape of the pre-processing clamp 30a in the said embodiment is good also as a shape which connected the pre-processing clamp which consists of a serial beam part shown in FIG. In the pre-processing clamp 230a provided in this case, the slits 80 to 82 formed by the three long holes in the embodiment are connected in the vertical direction at positions along the center line a.

  In the above-described embodiment, the convex portion 47 and the concave portion 48 functioning as positioning portions are provided on the clamp 30. However, the convex portion 47 and the concave portion 48 are not necessarily provided. In this case, a pre-process clamp 330a having a shape as shown in FIG. 13 is provided.

  The shape of the pre-processing clamp 30a in the above-described embodiment is a shape like a pre-processing clamp 430a in which a predetermined beam portion is provided with a convex portion toward an adjacent beam portion in the row direction as shown in FIG. Also good. The broken lines in FIG. 14 are lines indicating the boundaries between the right arm portion 50, the left arm portion 60, and the connecting portion 70 as in the previous drawings. In this case, in the left arm portion 60, a convex portion 91 is formed at the left end portion of the second beam portion 442 from the top toward the third beam portion 443 from the top adjacent to the beam portion 442. At the left end portion of the fifth beam portion 445, a convex portion 92 is formed so as to project toward the fourth beam portion 444 from the top adjacent to the beam portion 445. Also in the right arm 50, like the convex portion 91 and the convex portion 92, the right end portion of the second beam portion 436 from the top is directed to the third beam portion 437 from the top adjacent to the beam portion 436. A convex portion 93 is formed, and a convex portion 94 is projected and formed at the left end portion of the fifth beam portion 439 from the top toward the fourth beam portion 438 adjacent to the beam portion 439.

  Further, in the left arm portion 60 and the right arm portion 50, the second beam portion 442 from the top and the boundary portion between the beam portion 436 and the connecting beam portion 432 have a top portion adjacent to the respective beam portions 442 and 436. A convex portion 95 and a convex portion 96 are formed toward the respective beam portions 441 and 435. Similarly, in the left arm portion 60 and the right arm portion 50, the lowermost end adjacent to each of the beam portions 445 and 439 is located at the boundary portion between the beam portion 445 from the top and the connecting beam portion 433 of the beam portion 439. A convex portion 97 and a convex portion 98 are formed toward the respective beam portions 446 and 440. In FIG. 14, reference numerals 480 to 486 are slits, 431 to 434 are connecting beam portions, and 432a, 432b, 433a, and 433b are meat removal portions.

  In the case of a clamp manufactured by bending the pre-processing clamp 430a of FIG. 14, when the upward load along the axis P direction is applied and the clamp is bent in the contracting direction, the load When the strength exceeds the predetermined limit load, adjacent beam portions come into contact with each other through the respective convex portions 91 to 98. At this point of contact, the clamp loses the axial spring characteristic, and the clamp functions as a rigid body. Therefore, the injector 13 is securely locked so as not to move in the displacement direction from the cylinder head 11 side to the delivery pipe 12 with respect to an axial load exceeding the limit load based on the high combustion pressure from the combustion chamber 14. can do.

  As shown in FIG. 15, the shape of the pre-processing clamp 30a in the above-described embodiment is a pre-processing clamp in which the slit shape including the long hole and the notch in this embodiment (see FIG. 3) is gradually changed. It is good also as a shape of 530a. According to this configuration, it is possible to equalize the stress of each beam portion and reduce the material for clamping. In FIG. 15, reference numerals 531 to 534 are connecting beam portions, and 535 to 546 are beam portions.

  In the above-described embodiment, the pre-process clamp 30a is bent into a substantially horseshoe-shaped clamp 30 and then heat-treated to impart spring characteristics. However, the pre-process clamp 30a is directly applied from a spring steel material (elastic material). After punching and forming, it may be bent.

  In the above-described embodiment, the clamp 30 is configured such that the left and right arm portions 50 and 60 abut and engage with each other so that the outer surface of the attachment component (injector 13) is sandwiched from the outside. In the case where an engagement hole is formed at the center of the side surface of the component), the inner surface of the attachment component (the inner surface of the engagement hole) may be abutted and engaged from the inside.

  In the embodiment, the beam portions 35 to 40 and 41 to 46 of the left and right arm portions 50 and 60 are connected to each other by the connecting beam portions 31 to 34, but at least one row of the beam portions of all the rows is connected. You may connect.

  In the embodiment, the beam portions 35 to 40 and 41 to 46 in all the rows of the left and right arm portions 50 and 60 have a substantially horseshoe shape in cross section perpendicular to the axis P that is parallel to the central axis of the injector 13. Although it is bent, the left and right beam portions (for example, the beam portions 35, 40, 41, and 46 at both ends in the direction of the axis P) in some rows may be parallel linear shapes. That is, when a pair of left and right parallel surfaces are formed on the barrel 21 of the injector 13 and the attachment end 18 of the delivery pipe 12, some of the left and right parallel surfaces are formed on the parallel surfaces. It is also possible to exert a detent function by engaging the beam portion.

Next, a technical idea that can be grasped from the embodiment and another example will be described below.
(A) The clamp according to any one of claims 1 to 6, wherein a protruding portion having a predetermined protruding height is formed on a beam portion of each row toward a beam portion adjacent in the row direction of each beam portion. .

  (B) The clamp according to any one of claims 1 to 6, wherein the beam portion of each row is formed in a shape in which a width dimension in the axial direction gradually increases or decreases in a direction orthogonal to the axial direction.

Explanatory drawing which shows the state which assembled | attached and hold | maintained the injector using the clamp in the attachment position in this embodiment. The perspective view of a clamp. The figure which shows the expansion | deployment shape of a clamp. The front view of a clamp. The rear view of a clamp. The right view of a clamp. The left view of a clamp. The top view of a clamp. The bottom view of a clamp. (A) (b) (c) is a top view of the clamp in another embodiment, respectively. The figure which shows the expansion | deployment shape of the clamp in another embodiment. The figure which shows the expansion | deployment shape of the clamp in another embodiment. The figure which shows the expansion | deployment shape of the clamp in another embodiment. The figure which shows the expansion | deployment shape of the clamp in another embodiment. The figure which shows the expansion | deployment shape of the clamp in another embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Cylinder head (1st attachment part), 12 ... Delivery pipe (2nd attachment part), 13 ... Injector (attachment part), 15 ... Attachment hole (attachment position), 24 ... Upper end part (one end part) 25 ... Lower end (the other end), 30 ... Clamp, 31-34, 431-434, 531-534 ... Connecting beam part, 35-46, 435-446, 535-546 ... Beam part, 47 ... Convex part (Positioning part), 48 ... Recess (Positioning holding part), 50 ... Right arm part (arm part), 60 ... Left arm part (arm part), 70 ... Connecting part, P ... Axis.

Claims (6)

A state in which the left and right arm portions that elastically contact and engage with the side surface of the attachment component and a connecting portion that connects the both arm portions are engaged, and the left and right arm portions are engaged with the side surface of the attachment component. In the clamp that can be assembled and held while restricting the movement of the mounting component from the mounting position to the predetermined axial direction perpendicular to the left-right direction with respect to the predetermined mounting position,
The left and right arm portions respectively have a plurality of parallelly extending beam portions arranged at predetermined intervals in the axial direction, and the beam portions of each row are connected in a meandering manner in the axial direction. Formed into
The connecting portion is a connecting beam portion that connects at least one row of the beam portions in each row in the right arm portion and the left arm portion and connects the beam portions that are in the same row position in the axial direction. Formed,
A clamp in which at least the left and right arm portions of the left and right arm portions and the connecting portion are formed of an elastic material. The clamp according to claim 1, wherein the right arm part and the left arm part are formed so as to be symmetrical with each other. The clamp according to claim 1 or 2, wherein the right arm portion and the left arm portion are connected to each other through the connecting beam portions in the entire rows. Each of the arm portions or the connecting portions is formed with a positioning portion that engages with a predetermined portion of the mounting component in a positioning manner when the left and right arm portions are engaged with the side surfaces of the mounting component. The clamp according to claim 3. The mounting part is between the first mounting portion where the mounting position is set and the second mounting portion positioned at a certain distance in the axial direction from the mounting position of the first mounting portion, The left and right arm portions are configured such that one end portion of the mounting part is attached to the first mounting portion and the other end portion is attached to the second mounting portion. Is engaged with the side surface of the attachment part, the left and right arm parts are arranged such that the beam part located closest to the first attachment part among the beam parts in each row is attached to the predetermined part of the attachment part. While the abutting engagement is performed so as to restrict the movement of the second mounting portion to the second mounting portion side, the beam portion positioned closest to the second mounting portion among the beam portions of each row is the second mounting portion. It is comprised so that it may contact-engage from the 1st attachment part side with respect to 1st Claim. Lamp. Each of the arm portions or the connecting portions is formed with a positioning portion that engages with a predetermined portion of the second mounting portion in a positioning manner when the left and right arm portions are engaged with the side surfaces of the mounting component. Item 6. The clamp according to item 5.

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