JP2020037139A - Positioning crimp mechanism and positioning crimp tool - Google Patents

Abstract

To provide positioning crimp mechanism and tool which crimp a second work-piece having an opening to a first curved work-piece having elasticity with good accuracy so as to place the second work-piece at a predetermined position, and can set a pressing force.SOLUTION: A positioning crimp mechanism comprises: a driving block for inputting a pressing force; a central driven block which is movably provided on a pressing side of the driving block; a first spring which transmits and energizes the pressing force of the driving block to the central driven block; a work-piece attachment part of the central driven block to which a second work-piece is detachably attached: a central pressing surface at a tip of the work-piece attachment part; an aiming attachment which is detachably fitted in an opening of the second work-piece, and a tip side of which is fitted and inserted in an opening of the first work-piece; plural peripheral driven blocks which are movably provided on a pressing direction side of the driving block so as to surround the work-piece attachment part; a second spring which transmits and energizes the pressing force to the peripheral driven blocks; and a peripheral pressing surface at a tip of each peripheral driven block.SELECTED DRAWING: Figure 1

Description

  According to the present invention, the press-bonded surface of the second work having the opening formed therethrough is connected to the press-bonded surface of the first work having the opening formed through the second work with respect to the position of the opening of the first work. And press-fitting so that the relative position of the opening of the work becomes a predetermined position.

  With respect to such a positioning crimping technique, the techniques described in Patent Documents 1 and 2 are known. The center alignment device for a cylindrical member described in Patent Literature 1 aligns centers of two cylindrical members having different diameters (see FIG. 1 of Patent Literature 1). In the moving unit (2) on the pressing side, the first work (4) having a cylindrical portion is externally fitted to a cylindrical centering chuck (14), and the lower end portion (10) is coaxial with the centering chuck (14). 13a) is provided with a reference pin (13) formed in a tapered shape. On the other hand, in the fixed side unit (3) which is the pressed side, the cylindrical portion of the second work (5) is fitted into the holder member (22a) (see FIG. 2 of Patent Document 1) divided into three in the circumferential direction. Then, the three pieces of the holder member (22a) are biased toward the center by the compression coil spring (24). By lowering the moving unit (2) and inserting the tapered end of the reference pin (13) into the center of the three pieces of the holder member (22a), the holder member (22a) is compressed by the compression coil spring (24). Is adjusted, and thus the position of the second work (5) is adjusted, whereby center alignment is performed.

  The component mounting device described in Patent Literature 2 is a device for mounting one component (26) to another component (12) by fitting a concave portion (13) and a convex portion (28) of each other (Patent). See FIGS. 4 and 5 of Reference 2.) In this device, a component mounting portion (18) is connected to a lower end of a driving portion (16) at a tip end of a rod (14) that moves up and down above a component (12) fixed to an upper surface of a support via a coil spring (17). And the component (26) is fitted to the lower end of the component mounting portion (18). A ball joint structure is provided at the upper end of the component mounting portion (18), and the upper end of the component mounting portion (18) that comes into contact with / separates from the lower end of the drive portion (16) is freely tilted by this ball joint structure. It is possible. By lowering the rod (14), the component mounting portion (18) descends, and first, the convex portion (28) of the component (26) is inserted into the concave portion (13) of the component (12), and further moves downward. As a result, the component (26) is gradually pressed against the component (12) by the coil spring (17), and further moves downward, so that the lower end of the drive unit (16) comes into contact with the upper end of the component mounting unit (18). The pressing force applied to the rod (14) is directly transmitted to the part (26), and the part (26) is strongly crimped to the part (12). Further, even if the descending axis of the rod (14) and the central axis of the component (12) are slightly inclined by the ball joint structure, the upper end of the component mounting portion (18) is inclined to correct the inclination.

JP 2009-119575 A Japanese Utility Model Publication No. 58-177271 JP-A-2-144892 Japanese Utility Model Publication No. 7-16392 JP-A-2006-8923 JP 2012-86583 A

  In an assembly process of an automobile body or the like, a retainer for attaching a collision sensor to a circular opening formed in an elastic, curved, first work such as a bumper (for example, see Patent Documents 5 and 6) In some cases, it is necessary to accurately press-bond and adhere a second work having a circular opening so that the central axes of both openings coincide with each other. In such a case, when the technique of Patent Document 1 is applied, the first work is larger than the second work and is difficult to move freely. It cannot be applied for positioning. Further, when the first work is flat, it can be applied to perform accurate positioning. However, when the first work has an elastic curved surface such as a bumper, it cannot be applied.

  On the other hand, when the technique of Patent Document 2 is applied, the second work (part (26)) is fitted with a fitting projection (shaft (28)) fitted into the circular opening of the first work (part (12)). ) Is a necessary condition. However, when the retainer having the opening is adhered to the surface of the bumper having the opening as described above, the attaching surface of the retainer facing the bumper is flat and has a fitting projection that fits into the opening of the bumper. do not do. Therefore, in the case where the second work does not have the fitting protrusion that fits into the opening of the first work, the technique of Patent Document 2 cannot be applied.

  In addition, for example, a lamp mounting base metal fitting (second work) is attached to a light mounting hole of an automobile, or a washer nozzle mounting base metal fitting (second work) is mounted to a washer nozzle mounting hole. In many cases, the size of the opening of the second work (such as the opening of the mounting base) is smaller than the size of the opening of the first work (such as the light mounting hole and the washer nozzle mounting hole). In such a case, there is also a problem that it is difficult to accurately press-bond and adhere such that the relative positions of the openings become the designed predetermined positions.

  Therefore, an object of the present invention is to provide a method in which the first work has an opening of the second work regardless of whether the first work is fixed or movable, even if the first work has a curved surface having elasticity. Even if it is larger than the opening of the work, the second work having the opening is precisely pressed against the first work having the opening so that the relative positions of the openings are at predetermined positions. It is an object of the present invention to provide a positioning crimping mechanism and a positioning crimping tool which are different from the above prior art.

The first configuration of the positioning pressure bonding mechanism according to the present invention is such that the pressure bonding surface of the second work having the opening formed therethrough is formed by pressing the pressure bonding surface of the first work having the opening formed therethrough. A positioning crimping mechanism for crimping such that a relative position of the opening of the second work to a position of the opening of the first work is a predetermined position,
A driving block, which is a block for inputting a pressing force in one pressing direction,
A central driven block, which is a block movably disposed within a certain stroke range, in a state where the moving direction is restricted in a direction parallel to the pressing direction, on the pressing direction side of the main driving block,
A first spring that transmits a pressing force input to the driving block to the central driven block, and biases the central driven block in the pressing direction;
A work attachment part formed on the pressing direction side of the central driven block and being a part to which the second work is detachably attached;
A central pressing surface abutting on a pressing surface opposite to the pressing surface around the opening of the second work, which is a surface located at the pressing direction side end of the work attaching portion;
The proximal portion is formed to have the same thickness as the distal portion or to be thinner than the distal portion, and the proximal portion is detachably fitted in the opening of the second work, and A sighting attachment whose part is fitted and inserted into the opening of the first work;
A plurality of movable blocks are provided on the pressing direction side of the driving block so as to surround the work attachment portion, and move within a certain stroke range in a state where the moving direction is regulated in a direction parallel to the pressing direction of the driving block. A peripheral driven block freely arranged,
A second spring that is provided for each of the peripheral driven blocks and transmits a pressing force input to the main driven block to the peripheral driven block, and biases the peripheral driven block in a pressing direction;
A peripheral pressing surface that is located at the distal end in the pressing direction of each of the peripheral driven blocks, and is a peripheral pressing surface that abuts on a peripheral portion of a portion where the central pressing surface abuts on the pressing surface of the second work; It is characterized by having.

  According to this configuration, when performing the positioning pressure bonding process, first, as a first step, the opening (H2) of the second workpiece (W2) is opened from the pressure bonding surface (F2a) side of the second workpiece (W2). The aiming attachment is fitted into the inside and fitted therein, and the pressing surface (F2b) side of the second work (W2) is mounted (wears in a held state) on the work mounting portion of the central driven block. Next, as a second step, the sighting attachment attached to the central driven block via the second work (W2) is attached to the first work (W1) from the side of the pressure-bonded surface (F1a) of the first work (W1). W1) is fitted and inserted into the opening (H1). At this time, the center pressing surface at the front end in the pressing direction of the work attachment portion is provided at a portion (hereinafter, referred to as “central pressing portion”) of the second pressing surface (F2b) around the work opening (H2). I do. At this time, positioning is performed by the aiming attachment such that the relative position of the opening (H2) with respect to the opening (H1) is a predetermined position. Next, as a third step, a pressing force is input to the driving block in the pressing direction. Accordingly, when the driving block advances in the pressing direction, first, the compression force of the first spring gradually increases the pressing force of the central pressing surface against the central pressing portion of the pressing surface (F2b). Next, as the main driving block further advances, the peripheral pressing surface at the pressing direction side end of each peripheral driven block abuts on the pressing surface (F2b) of the second work, and the peripheral pressing surface presses the second work (W2). The pressing force on the peripheral portion (hereinafter, referred to as “peripheral pressing portion”) of the central pressing portion on the surface (F2b) gradually rises later than the central pressing portion. As a result, first, the central pressing portion near the openings (H1, H2) is pressed first, and then the peripheral pressing portions around the central pressing portion are pressed while gradually increasing the pressing force. In this manner, the first work (W1) and the second work (W2) are pressed in such a manner that the pressure is spread from the periphery of the central pressing portion to the peripheral pressing portion with a time difference stepwise. Even if distortion due to the pressing force occurs near the openings (H1, H2), the shearing force and bending moment due to the distortion are gradually released from the periphery of the central pressing portion to the peripheral pressing portion and further to the peripheral portion. Therefore, it is possible to realize a pressure bonding step that is uniform around the openings (H1 and H2) and has very little displacement due to distortion. In particular, in the case where an adhesive is sandwiched between the pressure-bonded surfaces (F1a, F2a) or when heat-welding is performed, a position apart from the openings (H1, H2) is bonded first without distortion due to the pressing force. Then, when distortion due to the pressing force occurs, a lateral displacement force from the previously bonded portion acts, so that the displacement is likely to occur around the openings (H1, H2). However, in the positioning press bonding mechanism of the present invention, since the periphery of the opening (H1, H2) is strongly bonded in advance, the position due to the lateral displacement force applied from the peripheral part when such a distortion due to the pressing force occurs. Displacement is less likely to occur, and an extremely high-precision positioning press bonding process can be realized.

  In addition, since the peripheral driven blocks can move independently of each other, the pressure-bonded surfaces (F1a, F2a) around the openings (H1, H2) of the first work (W1) and the second work (W2) are reduced. Even if it is not a flat surface, each peripheral driven block moves and performs a pressing operation in conformity with the shape of the pressure bonding surface (F1a, F2a). Thereby, regardless of the shape of the crimping surfaces (F1a, F2a), the crimping surface (F2a) of the second work (W2) is crimped on the crimping surface (F1a) of the first work (W1) with a constant pressing force. Is done. At this time, the pressing force at the time of crimping can be set by appropriately adjusting the spring constant and the pressing width of the first and second springs.

  Furthermore, the positioning of the relative positions of the openings (H1, H2) of the first work (W1) and the second work (W2) is performed by fitting and inserting into the opening (H2) of the second work (W2). The aiming attachment is made. Therefore, even when the opening (H1) of the first work (W1) is larger than the opening (H2) of the second work (W2), the aiming attachment is moved to the opening (H1) of the first work (W1). If the size is adjusted to H1), it is possible to perform accurate positioning pressure bonding.

  Here, in the present invention, it is possible to comprise a displacement detecting means for detecting a displacement of the central driven block with respect to the driven block. By detecting the displacement of the central driven block with respect to the driven block by this displacement detecting means, the pressing force by the first spring can be detected. Thereby, when the displacement detected by the displacement detecting means reaches a predetermined target value, the pressing input to the driving block is stopped, so that the second work (W2) is crimped on the first work (W1). It is possible to accurately adjust the pressing force at the time of performing. In particular, in a production line for mass-producing products, it is effective because quality can be assured so that the pressing force at the time of crimping work is constant. The displacement detecting means includes a position sensor such as a proximity sensor or a distance sensor (a non-contact detection method), a position gauge having a displacement scale, and a limit switch (contact detection detection) which is turned on when a certain displacement is reached. Method) can be used.

  Further, the positional relationship between the center pressing surface and the peripheral pressing surface is such that after the center pressing surface first contacts the upper surface of the second work (W2), each peripheral pressing surface contacts the upper surface of the second work (W2). It is preferable that the positional relationship is such that the contact is made. First, by pressing the periphery of the opening of the second work (W2) to the upper surface of the first work (W1) by the center pressing surface, positioning and pressing are performed with a time lag according to the steps described above. This is because displacement during crimping is unlikely to occur. Therefore, when the upper surface of the second work (W2) is a flat surface, it is preferable that the central pressing surface is located below the peripheral pressing surface. However, if there is unevenness or a step on the upper surface of the second work (W2), the center pressing surface is firstly changed to the upper surface of the second work (W2) according to the upper surface shape of the second work (W2). It is necessary to determine the positional relationship between the central pressing surface and the peripheral pressing surface so as to abut against.

  The structure in which the work attaching portion detachably attaches the second work (W2) includes a structure in which the second work (W2) and the work attaching portion are fitted to each other, and A structure in which a ferromagnetic material is provided near the opening (H2) of the second work (W2) and the work holding part is a magnet, and the work holding part and the second work are magnetically attached to each other, A second work in which the work attachment portion and the aiming attachment are fitted and inserted using the ferrite or magnet as the aiming attachment to be inserted and inserted into the opening (H2) of (W2) and the magnet as the work attachment portion. And the like can be adopted to have a structure in which they are magnetically attached to each other.

  The “first spring that transmits the pressing force input to the driving block to the central driven block and urges the central driven block in the pressing direction” is not necessarily a direct driving block and a central driven block. It may not be connected, and the pressing force input to the main driving block indirectly via another mechanical element may be transmitted to the central driven block to urge the central driven block in the pressing direction ( For example, see the first spring 4 in FIG. 5).

A second configuration of the positioning pressure bonding mechanism according to the present invention is the positioning device according to the first configuration, wherein, in the first configuration, the work attachment portion is arranged on a pressing direction side of the central driven block from a side of the central driven block facing the main driving block. To the center of, a central insertion hole formed to penetrate the central driven block,
An extruding block which is slidably inserted into the center insertion hole, a base end side of which is pushed by the main driving block, and a distal end side which protrudes from a central surface of the work attaching portion on the pressing direction side of the central driven block. When,
A third spring interposed between the central driven block and the pushing block, for urging the pushing block in a direction opposite to a pressing direction.

  According to this configuration, when a pressing force is input to the driving block in the pressing direction and the driving block advances in the pressing direction, the extrusion block is pushed in the pressing direction by the driving block, and the tip side of the extrusion block is in the second direction. The sighting attachment abutted on the work (W2) is pressed against the sighting attachment, the sighting attachment is pulled out of the opening (H2) of the second work (W2), and the opening of the first work (W1). It is extruded and removed in the pressing direction through (H1). Thereby, the work of separately removing the aiming attachment after the crimping step is omitted.

  The positioning crimping tool according to the present invention may be configured such that the crimping surface of the second work having the opening formed therethrough is moved between the crimping surface of the first work having the opening formed therethrough. A positioning crimping tool for crimping so that the relative position of the opening of the second work with respect to the position of the opening is a predetermined position, comprising the positioning crimping mechanism of the first or second configuration. Features.

  With this configuration, it is possible to easily and reliably perform the crimping operation that requires high positioning accuracy.

  As described above, according to the present invention, the driving block presses the vicinity of the opening edge of the second work, the peripheral driven blocks press the peripheral area thereof, and the peripheral driven blocks move independently of each other. Since the pressure can be adjusted in accordance with the shape of the surface, the center position of the opening of the second work can be adjusted to a predetermined position on the upper surface of the first work even if the first work has an elastic curved surface. It is possible to perform pressure bonding with high accuracy such that In addition, it becomes possible to perform the crimping work regardless of whether the first work is fixed or movable.

  Further, the positional relationship between the center pressing surface and the peripheral pressing surface is determined such that after the center pressing surface first contacts the upper surface of the second work W2, each peripheral pressing surface contacts the upper surface of the second work W2. If the positional relationship is as follows, (1) axial alignment by the center rod, (2) crimping of the area near the opening of the second work, and (3) crimping of the edge area of the second work. After that, the positioning crimping operation is executed, and the positioning crimping operation can be performed with higher accuracy.

  Further, an aiming attachment is fitted and inserted into the opening of the second work, and positioning of the relative positions of the openings (H1, H2) of the first work (W1) and the second work (W2) is aimed. The first attachment (H1) of the first work (W1) is larger than the opening (H2) of the second work (W2), so that the aiming attachment is set to the first attachment. If the size is adjusted to the size of the opening (H1) of the work (W1), accurate positioning and pressure bonding can be performed.

FIG. 2 is a diagram illustrating a configuration of a positioning press bonding mechanism according to the first embodiment of the present invention. It is a figure showing the crimping operation of the positioning crimping mechanism 1 according to the present embodiment. It is a figure showing the crimping operation of the positioning crimping mechanism 1 according to the present embodiment. It is a figure showing the press-fitting operation of the positioning press-fitting mechanism 1 when the press-fitting surface F1a of the first work W1 is a concave surface. It is a figure showing the modification of the positioning pressure bonding mechanism concerning Example 1 of the present invention. FIG. 6 is a side view of a positioning crimping tool according to a second embodiment of the present invention. FIG. 5 is a cross-sectional view of a positioning crimping tool according to a second embodiment of the present invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration of a positioning crimping mechanism according to the first embodiment of the present invention. In FIG. 1, FIG. 1A shows a state in which the second work W2 is mounted on the positioning press bonding mechanism 1, and FIG. 1B shows a state in which the second work W2 is removed from the positioning compression bonding mechanism 1. Represents. The positioning press-bonding mechanism 1 moves the press-bonding surface F2a of the second work W2 through which the opening H2 is formed through to the first press-fitting surface F1a of the first work W1 through which the opening H1 is formed through-through. This is a mechanism for performing pressure bonding so that the relative position of the opening H2 of the second work W2 to the position of the opening H1 of the work W1 is a predetermined position. The opening H1 of the first work W1 and the opening H2 of the second work W2 do not necessarily have to be circular, but are openings of any shape. Further, the pressure-bonded surface F1a of the first work W1 and the pressure-bonded surface F2a of the second work W2 need not be flat, but may be curved.

  Hereinafter, the side surface of the first work W1 facing the second work W2 is a crimping surface F1a, the side surface of the second work W2 facing the first work W1 is the crimping surface F2a, and the side surface of the second work W2. Among them, the surface opposite to the crimping surface F2a is referred to as a pressing surface F2b.

  As shown in FIG. 1, the positioning and pressing mechanism 1 according to the present embodiment includes a driving block 2, a center driven block 3, a first spring 4, an aiming attachment 5, a peripheral driven block 6, a second spring 7, an extrusion block. 8, a third spring 9 is provided. The driving block 2 is a block for inputting a pressing force in one pressing direction (the direction of arrow A in FIG. 1A). The “pressing direction” is the direction of the pressing force. “Block” means a mechanical element that is displaced as a unit. The center driven block 3 is a block provided on the pressing direction side of the main driving block 1 such that the moving direction is regulated in a direction parallel to the pressing direction and is movable within a certain stroke range. On the pressing side of the central driven block 3, there is formed a work attachment portion 3a, which is a portion to which the second work W2 is detachably attached. The “pressing direction side” means a side end side in the direction of the pressing force input to the driving block 2. The side on which the pressing force is input to the driving block 2 is referred to as the "pressing side" (see FIG. 1A). The shape of the work attachment portion 3a is formed so that the second work W2 can be fitted therein. In FIG. 1, a boss portion B2 is formed to protrude around an opening H2 on the side of the pressing surface F2b of the second work W2, and the work attachment portion 3a has a recess at the center where the boss portion B2 can be fitted. A depression is formed. The shape of the work attachment portion 3a may be any shape as long as the second work W2 can be attached according to the shape around the opening H2 of the second work W2. Also, although different from the configuration of FIG. 1, a magnet (permanent magnet or electromagnet) is mounted on the work attachment portion 3a and the sighting attachment 5 is made of a ferromagnetic material, whereby the second sighting attachment 5 is mounted. It is also possible to adopt a configuration in which the work W2 is magnetically attached to the work attaching portion 3a by magnetic force.

  The surface of the portion positioned at the tip in the pressing direction of the work attaching portion 3a is a pressing surface around the opening H2 of the second work W2 when the second work W2 is attached to the work attaching portion 3a. Installed at F2b. This surface is called the center pressing surface 3b. A central insertion hole 3c is provided through the center of the central pressing surface 3b. The central insertion hole 3c is formed in a through-hole formed linearly in the pressing direction from the side of the central driven block 3c facing the driving block 3 to the center of the work attachment portion 3a on the pressing direction side of the central driven block 3c. Hole.

  The first spring 4 is a spring that transmits the pressing force input to the main driven block 2 to the central driven block 3 and urges the central driven block 3 in the pressing direction. A plurality of peripheral driven blocks 6 are provided on the pressing direction side of the driven block 2 so as to surround the work attachment portion 3a. Each peripheral driven block 6 is arranged movably within a certain stroke range in a state where the moving direction is restricted in a direction parallel to the pressing direction of the driven block 2.

  The number of the peripheral driven blocks 6 is not particularly limited, and can be appropriately determined according to the shapes of the works W1 and W2. Further, in order to make the pressing force applied to the workpieces W1 and W2 as uniform as possible, it is preferable that the peripheral driven blocks 6 are disposed symmetrically with respect to the central axes of the main driven block 2 and the central driven block 3.

  The front end surface of each peripheral driven block 6 on the pressing direction side is referred to as a peripheral pressing surface 6a, which is opposed to the pressing surface of the second work W2. Of the pressing surface of the work W2 of FIG. A second spring 7 is provided for each peripheral driven block 6. The second springs 7 are interposed between the respective driven blocks 6 and the driven block 2. These second springs 7 are springs that transmit the pressing force input to the main driving block 2 to the peripheral driven block 6 and urge the peripheral driven block 6 in the pressing direction.

  The pushing block 8 is slidably provided in the center insertion hole 3c of the center driven block 3 so as to penetrate the center insertion hole 3c. The base end side (pressurizing side) of the extrusion block 8 protrudes from the pressurizing side surface of the central driven block 3, and the base end side surface is driven by the main driving block 2 when a pressing force is input from the main driving block 2. 2 is provided on the surface on the pressing direction side. On the other hand, the tip side (pressing direction side) of the extrusion block 8 protrudes from the center of the concave portion of the work attachment portion 3a formed on the pressing direction side of the central driven block 3, and the end face on the tip side is When a pressing force is input from the driving block 2, the pressing member 5 is provided on a surface on the pressure side of the sighting attachment 5 described later. A third spring 9 is interposed between the central driven block and the pushing block, and the third spring 9 urges the pushing block 8 so as to push it back in a direction opposite to the pushing direction.

  The sighting attachment 5 has a base end side (pressing side) (hereinafter referred to as a fitting portion 5a) removably fitted into the opening H2 of the second work W2 and a distal end side (pressed). A portion (hereinafter referred to as an insertion portion 5b) of the first work W1 is a block that is fitted and inserted into the opening H1 of the first work W1. The fitting portion 5a on the proximal end side of the sighting attachment 5 is fitted to the second work W2 by being fitted into the opening H2 of the second work W2 from the pressing direction side of the second work W2. You. The insertion portion 5b on the distal end side of the sighting attachment 5 is fitted into the opening H1 of the first work W1 so as to fit the opening, and the opening H1 is formed in a shape that can be inserted from the pressure input side to the pressing direction side. Have been. Further, in the sighting attachment 5, the fitting portion 5a is formed to have the same thickness as the insertion portion 5b or to be thinner than the insertion portion 5b, and the sighting attachment 5 as a whole is configured so that the opening H1 of the first work W1 is closed. It is possible to allow the pressure from the pressure side to the pressure side.

  The operation of the positioning and crimping mechanism according to the present embodiment configured as described above will be described below. 2 and 3 are views showing the crimping operation of the positioning crimping mechanism 1 according to the present embodiment. The operation is performed in the order of FIGS. 2A, 2B, 3A, and 3B. The second work W2 is positioned and pressure-bonded to the first work W1 such that the relative position of the opening H2 of the second work W2 to the opening H1 of the first work W1 is at a predetermined position.

(Step 1)
First, as shown in FIG. 2A, the fitting portion 5a of the sighting attachment 5 is fitted into the opening H2 of the second work W2 from the side of the crimping surface F2a, so that the second work W2 is The sighting attachment 5 is attached to the crimping surface F2a side. Then, the boss portion B2 of the second work W2 on which the sighting attachment 5 is held is fitted to the work attachment portion 3a of the central driven block 3. In this state, no pressing force is input to the driving block 2, and the first spring 4, the second spring 7, and the third spring 9 are in a state of being extended to the maximum. The peripheral pressing surface 6a at the tip of each peripheral driven block 6 is separated from the pressing surface F2b of the second work W2, and the pushing pressing surface 8a at the tip of the pushing block 8 is fitted to the fitting portion 5a of the sighting attachment 5. In a state separated from the end face on the base end side. At this time, the central pressing surface 3b of the central driven block 3 comes into contact with the pressing surface F2b around the opening H2 of the second work W2.

  As described above, the second work W2, to which the sighting attachment 5 is fitted before the crimping is performed, is attached to the work attachment portion 3a of the central driven block 3, whereby the positioning and pressing mechanism 1 is positioned. When applied to a crimping tool, the positioning crimping tool with the sighting attachment 5 and the second work W2 can be carried together with the crimping tool, so that the convenience in performing work is improved and the usability is improved.

  In addition, here, the work procedure will be described as first attaching the second work W2 to which the aiming attachment 5 has been fitted to the work attaching portion 3a. The work procedure may be such that the fitted second work W2 is fitted into the opening H1 of the first work W1, positioned, and then attached to the work attachment 3a.

(Step 2)
Next, as shown in FIG. 2B, the positioning crimping mechanism 1 on which the second work W2 and the sighting attachment 5 are mounted is brought closer to the opening H1 from the side of the crimping surface F1a of the first work W1. Then, the insertion portion 5b of the sighting attachment 5 is inserted into the opening H1, and the crimping surface F2a of the second work W2 is brought into contact with the crimping surface F1a of the first work W1. At this time, since the insertion portion 5b of the sighting attachment 5 is formed into a shape that fits inside the opening H1 of the first work W1, the insertion portion 5b is automatically inserted by inserting the insertion portion 5b into the opening H1. Specifically, the relative position of the second work W2 with respect to the first work W1 is positioned at a predetermined position. Furthermore, if the shapes of the opening H1 and the insertion portion 5b are circular, the relative orientation of the second work W2 with respect to the first work W1 is also determined in a predetermined direction.

(Step 3)
Next, as shown in FIG. 3A, a pressing force is input to the driving block 2 in the direction of arrow A (the pressing direction). At this time, the center pressing surface 3b of the center driven block 3 is provided on the pressing surface F2b of the second work W2, and the pressing surface F2a of the second work W2 is on the pressing surface F1a of the first work W1. Since it is provided, the center driven block 3 cannot be displaced in the pressing direction by the pressing of the first work W1. Accordingly, when the driving block 2 is displaced in the pressing direction A by the pressing force, the first spring 4 is compressed, and the pressing force is applied from the driving block 2 to the central driven block 3. As a result, a pressing force is applied from the central pressing surface 3b of the central driven block 3 to the pressing surface F2b around the opening H2 of the second work W2, and in association therewith, the pressing surface F2a around the opening H2 of the second work W2. Is pressure-bonded to a pressure-bonding surface F1a around the opening H1 of the first work W1.

  On the other hand, since each peripheral driven block 6 is linked to the main driving block 2 by the second spring 7, the peripheral driven block 6 is displaced in the pressing direction A in conjunction with the main driving block 2 being displaced in the pressing direction A. Then, at the stage where the peripheral driven block 6 is displaced by a certain distance, the peripheral pressing surface 6a on the distal end side of each peripheral driven block 6 is a portion of the pressing surface F2b of the second work W2 where the central pressing surface 3b abuts (hereinafter referred to as “center The peripheral part (hereinafter, referred to as a “peripheral pressed part”) of the peripheral part (hereinafter, referred to as a “peripheral pressed part”) comes into contact with the part (see FIG. 3A).

  Further, the end face 8b on the base end side of the pushing block 8 is pressed by the pushing block 8 by the displacement of the driving block 2 in the pushing direction A, and the pushing block 8 moves in the pushing direction while compressing the third spring 9 in association therewith. Displaced to A. Then, at the stage where the pushing block 8 is displaced by a certain distance, the pushing pressing surface 8a on the distal end side of the pushing block 8 reaches and comes into contact with the proximal end face of the fitting portion 5a of the aiming attachment 5 (see FIG. 3A). ).

(Step 4)
Next, as shown in FIG. 3B, when the driving block 2 further extends in the pressing direction A, the first spring 4 is further compressed, and a larger pressing force is applied from the driving block 2 to the central driven block 3. . As a result, the pressure-bonded surface F2a around the opening H2 of the second work W2 is more strongly pressed against the pressure-bonded surface F1a around the opening H1 of the first work W1.

  The peripheral pressing surface 6a of each peripheral driven block 6 is provided on the pressing surface F2b of the second work W2, and the pressing surface F2a of the second work W2 is on the pressing surface F1a of the first work W1. Since it is provided, the peripheral driven block 6 cannot be displaced in the pressing direction due to the pressing of the first work W1. Accordingly, when the driving block 2 is displaced in the pressing direction A by the pressing force, the second spring 7 is compressed, and the pressing force is applied from the driving block 2 to each peripheral driven block 6. Accordingly, a pressing force is applied from the peripheral pressing surface 6a of each peripheral driven block 6 to the peripheral pressing portion of the pressing surface F2b of the second work W2, and the pressing surface F2a of the peripheral pressing portion of the second work W2 is linked. Then, the first work W1 is pressure-bonded to the pressure-bonding surface F1a around the opening H1. In this way, first, the center pressing portion of the second work W2 near the openings H1 and H2 is first pressed against the pressing surface F1a of the first work W1, and then the second work W2 is pressed. The peripheral pressing portions around the central pressing portion are pressed against the pressing surface F1a of the first work W1 while gradually increasing the pressing force. As described above, the pressure is pressed from the periphery of the central pressing portion to the peripheral pressing portion with a time difference stepwise, so that the vicinity of the openings H1 and H2 of the first work W1 and the second work W2 at the time of pressing. Even if a strain due to the pressing force occurs, the shearing force and bending moment due to the strain are released from the periphery of the central pressing portion to the peripheral pressing portion and further to the peripheral portion, so that the uniform and distortion around the openings H1 and H2. A pressure bonding process with extremely small displacement due to the above can be realized.

  On the other hand, the push-out pressing surface 8a of the push-out block 8 is provided on the base end side surface of the fitting portion 5a of the aiming attachment 5, and the push-out block 8 is pressed by the driving block 2 via the third spring 9. Therefore, the pushing block 8 applies a gradually increasing pressing force in the pressing direction A to the aiming attachment 5. When the pressing force exceeds a certain limit, the sighting attachment 5 is pulled out from the opening H2 of the second work W2 and pushed through the opening H1 of the first work W1 in the pressing direction A. Removed. Thereby, the operation of separately removing the aiming attachment 5 after the crimping is omitted.

  Next, a case where the pressure-bonded surface F1a of the first work W1 is not flat will be described. FIG. 4 is a diagram illustrating the crimping operation of the positioning crimping mechanism 1 when the crimping surface F1a of the first work W1 is a concave surface. First, similarly to the case described with reference to FIG. 2B, the insertion portion 5b of the sighting attachment 5 attached to the work attachment portion 3a of the central driven block 3 via the second work W2 is By inserting the second work W2 into the opening H1 of the first work W1, the relative position of the second work W2 to the first work W1 is automatically positioned at a predetermined position (FIG. 4A). At this time, since the crimping surface F1a of the first work W1 is concave and the crimping surface F2a of the second work W2 is flat, the crimping surface F1a and the crimping surface F2a are not completely adhered. . Subsequently, when a pressing force is input to the main driving block 2 in the pressing direction of the arrow A, the center pressing surface 3b at the tip of the work attachment portion 3a of the central driven block 3 presses the periphery of the opening H2 of the second work W2. The surface F2b is pushed in the pressing direction, the second work W2 bends along the pressing surface F1a of the first work W1, and the pressing surface F1a and the pressing surface F2a are completely adhered to each other (FIG. 4B). At this time, since the peripheral pressing surface 6a of the peripheral driven block 6 has not yet reached the pressing surface F2b of the second work W2, the pressing force is applied only to the central pressing portion where the central pressing surface 3b is provided. . For this reason, since no pressing force is applied to the edge region of the second work W2, the displacement due to the bending of the second work W2 is prevented. When the main driving block 2 is further pushed in the pressing direction A, the peripheral pressing surface 6a of each peripheral driven block 6 presses the peripheral pressing portion around the central pressing portion of the second work W2. The entirety of the second work W2 is pressed against the first work W1 (FIG. 4C). At this time, since the peripheral driven blocks 6 move independently of each other, the pressing force when pressing the pressing surface F1a of the first work W1 is applied to the surface of the first work W1 regardless of the curved surface. Even if distortion occurs, each peripheral driven block 6 presses the peripheral pressing portion of the second work W2 in conformity with the shape of the crimping surface F1a of the first work W1, and according to the shape of the crimping surface F1a. The crimping process is performed accurately. In addition, each peripheral driven block 6 applies this positioning press bonding mechanism 1 specifically so that it can conform to the surface shape of the first work W1 and press the second work W2 more evenly. In this case, it is preferable that the peripheral driven block 6 be configured such that the tip portion (the pressing head 6b (see FIGS. 6 and 7)) can be freely rotated.

  Further, as a modified example of the positioning press bonding mechanism 1 of the present embodiment, a configuration as shown in FIG. 5 can be adopted. 5 is a distance sensor for detecting the displacement of the central driven block 3 with respect to the main driving block 2 at the point where an inclined guide portion 5c is provided at the tip of the insertion portion 5b of the aiming attachment 5. 20 (displacement detecting means), the point at which the spring shaft 2c is provided between the main driving block 2 and each peripheral driven block 6, and the position of the first spring 4 are determined by the central driven block 3 and each peripheral driven block 6. 1 in that the position of the second spring 7 is moved between the driving block 2 and each spring shaft 2c. Here, each of the first springs 4 and each of the second springs 7 are compression springs. The spring constant of the first spring 4 is set to be smaller than the spring constant of the second spring 7. The pressing head 2d at the distal end of the spring shaft 2c in the pressing direction and the pressing head 6c at the distal end on the pressing side of the peripheral driven block 6 opposed thereto are always in contact with each other, and the elastic force of the first spring 4 and the second spring 7 They are in a pressed state.

  The guide part 5c at the tip of the insertion part 5b of the sighting attachment 5 is formed in an inclined shape so that the cross section of the insertion part 5b is reduced toward the tip of the sighting attachment 5. The guide portion 5c is provided to guide the sighting attachment 5 to an appropriate predetermined position when the sighting attachment 5 is inserted into the opening H1 of the first work W1. By providing the guide portion 5c, the tip of the sighting attachment 5 can be easily inserted into the opening H1, and the positioning accuracy can be improved.

  Further, the pressing force by the first spring 4 can be detected by detecting the amount of displacement of the center driven block 3 with respect to the main driving block 2 (the amount of change in the distance ds1 in FIG. 5) by the distance sensor 20. Accordingly, when the displacement detected by the distance sensor 20 reaches a predetermined target value, the pressing input to the driving block 2 is stopped, and the pressure is applied when the second work W2 is pressed against the first work W1. The pressing force can be adjusted accurately. In addition, when performing multiple positioning crimping operations, it is possible to accurately confirm whether the specified pressing force has been reached each time. Therefore, insufficient pressing force (incomplete pressing) or excessive pressing force (excessive pressing) ) Can be prevented, the unevenness (variation) in the pressing force can be eliminated, and the quality of the product manufactured by the positioning press-bonding operation can be improved.

  When the sighting attachment 5 is inserted into the first work W1 and the pressing surface F1a of the first work W1 and the pressing surface F2a of the second work W2 are in contact with each other, the pressing force in the pressing direction A is applied to the driving block 2. When input, each spring shaft 2c is pressed in the pressing direction A via each first spring 4. Since the pressing head 2d of the spring shaft 2c is in contact with the pressure input head 6c of the peripheral driven block 6, the pressing force input to the spring shaft 2c is transmitted to the peripheral driven block 6 as it is. Although this pressing force compresses both the first spring 4 and the second spring 7, the spring constant of the first spring 4 is set to be smaller than the spring constant of the second spring 7. One spring 4 is compressed more. Also, the center driven block 3 is pressed in the pressing direction A by the compression of the first spring 4. The pressing force applied to the central driven block 3 by the compression of the first spring 4 is such that the driven block 2 moves in the pressing direction A until the peripheral pressing surface 6a of the peripheral driven block 6 reaches the pressing surface F2b of the second work W2. After being displaced and rising, it becomes constant after the peripheral pressing surface 6a abuts against the pressing surface F2b of the second work W2. When the peripheral pressing surface 6a abuts against the pressing surface F2b of the second work W2, the peripheral driven block 6 cannot be further displaced, so that the compression of the first spring 4 stops there and this time, only the second spring 7 is compressed. . When the second spring 7 is compressed, its elastic force is transmitted to the peripheral driven block 6 via the pressing head 2d of the spring shaft 2c, so that the peripheral work surface 6a of the peripheral driven block 6 The pressing force applied to the pressing surface F2b rises as the driving block 2 is displaced in the pressing direction A.

  FIG. 6 is a side view of the positioning crimping tool according to the second embodiment of the present invention. FIG. 7 is a sectional view of the positioning crimping tool according to the second embodiment of the present invention. 6 and 7, the same reference numerals are given to the portions corresponding to the components of the positioning crimping mechanism 1 (FIG. 1) of the first embodiment among the components of the positioning crimping tool 10. 6 and 7, a cylindrical handle 2a is formed on the base end side of the driving block 2. An operator using the positioning crimping tool 10 grasps the grip 2a to perform the positioning crimping operation. Do.

  On the side of the central driven block 3 in the pressing direction, a work holding portion 3a having a concave shape is formed (see FIG. 7). The work attachment portion 3a is formed in such a structure that the boss portion B2 of the second work W2 to which the sighting attachment 5 is attached can be magnetically attached, and the boss portion B2 is attached to the work attachment portion 3a by magnetic force. Thus, the second work W2 is attached to the work attachment unit 3a. For this reason, a magnet is provided inside the work attachment portion 3a, and the sighting attachment 5 is made of a ferromagnetic material. A cylindrical shaft-shaped linear shaft 3d, 3d protrudes from an end face on the pressure side of the central driven block 3 in parallel to the pressing direction A. The end of the linear shaft 3d, 3d on the pressure side is a driving block. 2 are slidably inserted into linear bushes 2b, 2b (rolling guide cylindrical linear motion mechanisms; linear ball bearings) provided on the end face on the pressing direction side (see FIG. 7). A first spring 4 for urging the distal end surface of the linear shaft 3d in the pressing direction is provided in the cylinder of each linear bush 2b.

  At the both ends in the longitudinal direction of the end face on the pressing direction side of the sighting attachment 5, there are provided protruding columnar guide portions 5 c, 5 c having conical tips. The guides 5c, 5c function as guides when the sighting attachment 5 is inserted into the opening H1 of the first work W1. By providing the guide portions 5c, 5c, an operation process of inserting the sighting attachment 5 into the opening H1 of the first work W1 becomes easy.

  The peripheral driven block 6 is formed of a metal rod having a circular cross section parallel to the pressing direction A. The peripheral driven block 6 has a middle portion slidably inserted into a linear bush 3 e provided on a side portion of the central driven block 3. At the end of the peripheral driven block 6 on the pressing direction side, a columnar pressing head 6b having an enlarged diameter is provided, and the distal end surface of the pressing head 6b serves as a peripheral pressing surface 6a. At the end of the peripheral driven block 6 on the pressure side, a pressure head 6c formed of a hexagon nut is provided. Between the pressure head 6c and the linear bush 3e, the pressure axis is coaxial with the central axis of the peripheral driven block 6. A return spring 7a is provided. The return spring 7a urges the pressure input head 6c toward the pressure input side. A spring shaft 2c is provided at a position opposing each peripheral driven block 6 on the pressing direction side of the main driving block 2 so as to protrude in the pressing direction side. A pressing head 2d made of a hexagonal nut is provided at the tip of the spring shaft 2c on the pressing direction side, and the pressing head 2d abuts on the pressure input head 6c of the peripheral driven block 6 facing the pressing head 2d. The pressure input head 2d of the spring shaft 2c is urged in the pressing direction A by a second spring 7 coaxially mounted on the center axis thereof.

  The extrusion block 8 is formed of a metal rod-shaped body slidably inserted into a center insertion hole 3c formed parallel to the pressing direction A along the center axis of the center driven block 3. At the end of the pushing block 8 on the pushing direction side, a cylindrical pushing head 8b having an enlarged diameter is provided, and the tip end surface of the pushing head 8b serves as an pushing pushing surface 8a. A pressurizing head 8c made of a hexagonal nut is provided at an end on the pressurizing side of the extrusion block 8, and a pressurizing head 8c between the pressurizing head 8c and the center insertion hole 3c is coaxial with the central axis of the extrusion block 8. Three springs 9 are provided. The third spring 9 urges the pressure input head 8c toward the pressure input side. Further, a spring shaft 2e is provided at a position facing the pushing block 8 on the pressing direction side of the driving block 2 so as to protrude toward the pressing direction. A pressing head 2f formed of a hexagonal nut is provided at a distal end of the spring shaft 2c on the pressing direction side, and the pressing head 2f abuts on the pressure input head 8c of the opposing extrusion block 8. The pressurizing head 2f of the spring shaft 2e is urged in the pressing direction A by a return spring 9a coaxially mounted on the center axis thereof.

  As described above, when performing the positioning crimping operation using the positioning crimping tool 10 using the positioning crimping mechanism 1 of the first embodiment, the operator first attaches the aiming part 3a of the center driven block 3 to the aiming part 3a. The second work W2 to which the attachment 5 is attached is fitted. Then, the operator holds the handle 2a of the driving block 2 and inserts the sighting attachment 5 into the opening H1 of the first work W1 (see FIG. 1). At this time, since the tip of the pointed columnar guides 5c, 5c provided in the aiming attachment 5 is inserted into the opening H1, the aiming attachment 5 is appropriately fitted by the guides 5c, 5c at the time of insertion. To the correct position, and accurate positioning is easily performed. Then, the operator can perform the positioning crimping operation by holding the handle 2a of the driving block 2 and pressing the pressing force in the pressing direction A. The operation of the positioning crimping tool 10 at this time is as described in the first embodiment.

DESCRIPTION OF SYMBOLS 1 Positioning pressure bonding mechanism 2 Main drive block 2a Handle 2b Linear bush 2c, 2e Spring shaft 2d, 2f Pressing head 3 Central driven block 3a Work holding part 3b Central pressing surface 3c Central insertion hole 3d Linear shaft 3e Linear bush 4 First spring 5 Aiming attachment 5a Fitting part 5b Insert part 5c Guide part 6 Peripheral driven block 6a Peripheral pressing surface 6b Pressing head 6c Press-in head 7 Second spring 7a Return spring 8 Extruding block 8a Push-out pressing surface 8b Pressing head 8c Press-in head 9 third spring 9a return spring 10 positioning crimping tool 20 distance sensor W1 first work F1a crimping surface H1 opening W2 second work F2a crimping surface F2b pressing surface H2 opening B2 boss

Claims (3)

The press-contact surface of the second work having the opening formed therethrough is connected to the second work relative to the position of the opening of the first work with respect to the press-contact surface of the first work having the opening formed through. A positioning crimping mechanism for crimping so that the relative position of the opening is a predetermined position,
A driving block, which is a block for inputting a pressing force in one pressing direction,
A central driven block, which is a block movably disposed within a certain stroke range, in a state where the moving direction is restricted in a direction parallel to the pressing direction, on the pressing direction side of the main driving block,
A first spring that transmits a pressing force input to the driving block to the central driven block, and biases the central driven block in the pressing direction;
A work attachment portion that is provided on the pressing direction side of the central driven block and is a portion to which the second work is detachably attached;
A central pressing surface abutting on a pressing surface opposite to the pressing surface around the opening of the second work, which is a surface located at the pressing direction side end of the work attaching portion;
The proximal portion is formed to have the same thickness as the distal portion or to be thinner than the distal portion, and the proximal portion is detachably fitted in the opening of the second work, and A sighting attachment whose part is fitted and inserted into the opening of the first work;
A plurality of movable blocks are provided on the pressing block side of the driving block so as to surround the work holding portion, and move within a predetermined stroke range in a state where the moving direction is regulated in a direction parallel to the pressing block of the driving block. A peripheral driven block freely arranged,
A second spring that is provided for each of the peripheral driven blocks, transmits a pressing force input to the main driven block to the peripheral driven block, and biases the peripheral driven block in a pressing direction;
A peripheral pressing surface provided on a peripheral portion of a portion of the pressing surface of the second workpiece, the central pressing surface being a peripheral surface located at the distal end in the pressing direction of each of the peripheral driven blocks; Positioning crimping mechanism with. A center insertion hole formed to penetrate the central driven block, from the side of the central driven block facing the main driven block to the center of the work attachment portion on the pressing direction side of the central driven block,
An extruding block which is slidably inserted into the center insertion hole, a base end side of which is pushed by the main driving block, and a distal end side which protrudes from a central surface of the work attaching portion on the pressing direction side of the central driven block. When,
2. The positioning pressure bonding mechanism according to claim 1, further comprising a third spring interposed between the central driven block and the pushing block, and biasing the pushing block in a direction opposite to a pressing direction. 3.   The press-contact surface of the second work having the opening formed therethrough is connected to the second work relative to the position of the opening of the first work with respect to the press-contact surface of the first work having the opening formed through. A positioning crimping tool for crimping so that the relative position of the opening is a predetermined position, comprising the positioning crimping mechanism according to claim 1 or 2.