JP7090854B2 - Positioning crimping mechanism and positioning crimping tool - Google Patents

Description

In the present invention, the crimping surface of the second work through which the opening is formed through is the second with respect to the position of the opening of the first work with respect to the crimping surface of the first work through which the opening is formed through. The present invention relates to a positioning crimping technique for crimping so that the relative position of the opening of the work is a predetermined position.

As for such a positioning crimping technique, the techniques described in Patent Documents 1 and 2 are known. The center alignment device for cylindrical members described in Patent Document 1 aligns the centers of two cylindrical members having different diameters with each other (see FIG. 1 of Patent Document 1). In the moving side unit (2) on the pressing side, the first work (4) having a cylindrical portion is externally fitted to the cylindrical centering chuck (14), and the lower tip portion (4) coaxial with the centering chuck (14). A reference pin (13) having a tapered shape of 13a) is provided. On the other hand, in the fixed side unit (3) on 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. The three pieces of the holder member (22a) are urged toward the center by the compression coil spring (24). By lowering the moving side unit (2) and inserting the tapered portion at the tip of the reference pin (13) into the center of the three split pieces of the holder member (22a), the holder member (22a) is formed by the compression coil spring (24). The position of, and by extension, the position of the second work (5) is adjusted, whereby center alignment is performed.

The component mounting device described in Patent Document 2 is a device for mounting one component (26) to another component (12) by fitting a concave portion (13) and a convex portion (28) to each other (Patent). See FIGS. 4 and 5 of Reference 2). In this device, the component mounting portion (18) is placed at the lower end of the drive portion (16) at the tip of the rod (14) that moves up and down above the component (12) fixed to the upper surface of the support base via a coil spring (17). Is impacted, 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 contacts / separates from the lower end of the drive unit (16) is freely tilted by this ball joint structure. It is possible. By moving the rod (14) downward, the component mounting portion (18) is lowered, and the convex portion (28) of the component (26) is first inserted into the concave portion (13) of the component (12) and further lowered. As a result, the component (26) is gradually crimped to the component (12) by the coil spring (17) and further lowered, so that the lower end of the drive unit (16) and the upper end of the component mounting portion (18) come into contact with each other. The pressing force applied to the rod (14) is directly transmitted to the component (26), and the component (26) is strongly crimped to the component (12). Further, even if the descent axis of the rod (14) and the central axis of the component (12) are slightly tilted due to the ball joint structure, the upper end of the component mounting portion (18) is tilted to correct the tilt.

Japanese Unexamined Patent Publication No. 2009-119575 Jitsukaisho 58-177271 Jitsukaihei No. 2-144892 Jitsukaihei 7-16392A Gazette Japanese Unexamined Patent Publication No. 2016-8923 Japanese Unexamined Patent Publication No. 2012-86583

In the assembly process of an automobile body, a retainer for mounting a collision sensor in a circular opening opened in an elastic curved first workpiece such as a bumper (see, for example, Patent Documents 5 and 6) and the like. It may be necessary to accurately crimp and attach the second work having the circular openings of the above 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 technique of Patent Document 1 is used because the first work is larger than the second work and it is difficult to move it freely. It cannot be applied and positioned. Further, when the first work is flat, it can be applied for accurate positioning, but when the first work has an elastic curved surface shape 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 portion (28)) that fits into the circular opening of the first work (part (12)). ) Is required. However, when a retainer having an opening is attached to the surface of a bumper having an opening as described above, the attachment surface of the retainer facing the bumper is flat and has a fitting protrusion that fits into the opening of the bumper. do not do. Therefore, in such a case where the second work does not have a fitting protrusion that fits with the opening of the first work, the technique of Patent Document 2 cannot be applied.

Further, for example, when mounting the lamp mounting base metal fitting (second work) in the light mounting hole of the automobile, or when mounting the washer nozzle mounting base metal fitting (second work) in the washer nozzle mounting hole. In many cases, the size of the opening of the second work (opening of the mounting base metal fitting, etc.) is smaller than the size of the opening of the first work (light mounting hole, washer nozzle mounting hole, etc.). In such a case, there is also a problem that it is difficult to accurately crimp and attach the position so that the relative positions of both openings are the designed predetermined positions.

Therefore, an object of the present invention is that even if the first work has an elastic curved surface shape, and regardless of whether the first work is fixed or movable, the opening of the first work is the second. Even if it is larger than the opening of the work, the second work having an opening is accurately crimped to the first work having an opening so that the relative positions of the openings are in predetermined positions. It is an object of the present invention to provide a positioning crimping mechanism and a positioning crimping tool different from those of the prior art.

The first configuration of the positioning crimping mechanism according to the present invention is the crimping surface of the second work having an opening formed through the crimping surface of the first work having an opening formed through the crimping surface. A positioning crimping mechanism for crimping so that the relative position of the opening of the second work to the position of the opening of the first work is a predetermined position.
The driving block, which is a block for inputting the pressing force in one pressing direction,
A central driven block, which is a block movably arranged within a certain stroke range in a state where the moving direction is restricted to a direction parallel to the pressing direction, on the pressing direction side of the driving block.
A first spring that transmits the pressing force input to the driven block to the central driven block and urges the central driven block in the pressing direction.
A work attachment portion formed on the pressing direction side of the central driven block, which is a portion to which the second work is detachably attached, and a work attachment portion.
A surface located at the tip of the work attachment portion on the pressing direction side, and a central pressing surface provided on the pressing surface on the opposite side of the crimping surface around the opening of the second work.
The proximal end side portion is formed to have the same thickness as the distal end side portion or thinner than the distal end side portion, and the proximal end side portion is detachably fitted in the opening of the second work and is fitted to the distal end side. An aiming attachment whose portion is fitted and inserted into the opening of the first work,
A plurality of pieces are arranged on the pressing direction side of the driving block so as to surround the work attachment portion, and the moving direction is restricted to a direction parallel to the pressing direction of the driving block, and the moving is within a certain stroke range. Freely arranged peripheral driven blocks and
A second spring provided for each of the peripheral driven blocks, which transmits the pressing force input to the driven block to the peripheral driven block and urges the peripheral driven block in the pressing direction.
A surface located at the tip of each peripheral driven block on the pressing direction side, and a peripheral pressing surface of the pressing surface of the second work, which is applied to a peripheral portion of a portion to which the central pressing surface is applied. It is characterized by being equipped with.

According to this configuration, when performing the positioning crimping step, first, as a first step, from the crimping surface (F2a) side of the second work (W2), the opening (H2) of the second work (W2). The aiming attachment is fitted and fitted inside, and the pressing surface (F2b) side of the second work (W2) is held (attached to the held state) to the work holding portion of the central driven block. Next, as a second step, the aiming attachment attached to the central driven block via the second work (W2) is attached to the first work (F1a) from the crimping surface (F1a) side of the first work (W1). It is fitted and inserted into the opening (H1) of W1). At this time, the central pressing surface at the tip of the work attachment portion on the pressing direction side is applied to a portion of the second pressing surface (F2b) around the opening (H2) of the work (hereinafter referred to as “center pressing portion”). do. At this time, the aiming attachment is positioned so 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. Along with this, when the driving block advances in the pressing direction, first, the pressing force of the pressing surface (F2b) by the central pressing surface gradually increases to the central pressing portion by the compression of the first spring. Next, as the driving block further progresses, the peripheral pressing surface at the tip of each peripheral driven block on the pressing direction side 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 of the surface (F2b) gradually increases behind the central pressing portion. As a result, first, the central pressing portion of the near-knot of the opening (H1, H2) is crimped in advance, and then the peripheral pressing portion around the central pressing portion is crimped while gradually increasing the crimping force. In this way, the crimping is performed so as to spread from the periphery of the central pressing portion to the peripheral pressing portion with a time lag in a stepwise manner, so that the first work (W1) and the second work (W2) are crimped at the time of crimping. Even if strain is generated near the opening (H1, H2) due to the pressing force, the shearing force and bending moment due to the strain are gradually released from the periphery of the central pressing portion to the peripheral pressing portion or the peripheral portion. Therefore, it is possible to realize a crimping process that is uniform around the openings (H1 and H2) and has extremely little displacement due to strain. In particular, when an adhesive is sandwiched between the crimping surfaces (F1a, F2a) or heat welded, the positions away from the openings (H1, H2) are first bonded without distortion due to pressing pressure. Then, when the strain due to the pressing force is generated, the lateral displacement force from the previously adhered portion acts, so that the positional displacement is likely to occur around the openings (H1, H2). However, in the positioning crimping 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 portion when such distortion due to the pressing force occurs. It is difficult to cause deviation, and it is possible to realize a positioning crimping process with extremely high accuracy.

Further, since each peripheral driven block can move independently of each other, the crimping surfaces (F1a, F2a) around the openings (H1, H2) of the first work (W1) and the second work (W2) are formed. Even if it is not a flat surface, each peripheral driven block moves to perform a pressing operation according to the shape of the crimping surface (F1a, F2a). As a result, regardless of the shape of the crimping surface (F1a, F2a), the crimping surface (F2a) of the second work (W2) is crimped to the crimping surface (F1a) of the first work (W1) with a constant pressing force. Will be 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.

Further, the positioning of the relative positions of the openings (H1, H2) of the first work (W1) and the second work (W2) is fitted and inserted into the opening (H2) of the second work (W2). It is done by the aiming attachment. 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 can be used as the opening (W1) of the first work (W1). If the size is adjusted to match H1), accurate positional crimping can be performed.

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

Further, regarding the positional relationship between the central pressing surface and the peripheral pressing surface, after the central pressing surface first abuts on the upper surface of the second work (W2), each peripheral pressing surface is the upper surface of the second work (W2). It is preferable to have a positional relationship so as to come into contact with. By first crimping the periphery of the opening of the second work (W2) to the upper surface of the first work (W1) by the central pressing surface, positioning crimping is performed with a time lag in steps as described above. This is because the position shift during crimping is unlikely to occur. Therefore, when the upper surface of the second work (W2) is a flat surface, it is preferable to configure the central pressing surface to be located below the peripheral pressing surface. However, if the upper surface of the second work (W2) has irregularities or steps, the central pressing surface is first the upper surface of the second work (W2) according to the shape of the upper surface 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 on.

Further, as a structure in which the work attachment portion detachably attaches and attaches the second work (W2), in addition to the structure in which the second work (W2) and the work attachment portion are fitted and fitted to each other. A structure in which a ferromagnet is provided near the opening (H2) of the second work (W2) and the work attachment portion is used as a magnet, and the work attachment portion and the second work are magnetically attached to each other, or the second work A second work in which the work attachment portion and the aiming attachment are fitted and inserted, with the aiming attachment fitted and inserted into the opening (H2) of (W2) as a ferromagnet or a magnet and the work attachment portion as a magnet. It is possible to adopt a structure in which and are magnetically attached to each other.

Further, the "first spring that transmits the pressing force input to the driven block to the central driven block and urges the central driven block in the pressing direction" is not necessarily directly connected to the driven block and the central driven block. It does not have to be connected, and the pressing force indirectly input to the driving block via other mechanical elements 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).

The second configuration of the position determination crimping mechanism according to the present invention is, in the first configuration, the work attachment portion on the pressing direction side of the central driven block from the side facing the driven block of the central driven block. A central insertion hole formed to penetrate the central driven block to the center of the
An extrusion block that is slidably inserted into the central insertion hole, the base end side is pushed by the main driving block, and the tip side protrudes from the central surface of the work attachment portion on the pressing direction side of the central driven block. When,
It is characterized by having a third spring interposed between the central driven block and the extrusion block and urging the extrusion block in a direction opposite to the pressing direction.

According to this configuration, when a pressing force is applied 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 the second. The aiming attachment is pressed against the aiming attachment fitted to the work (W2), and the aiming attachment is pulled out from 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). This eliminates the work of separately removing the aiming attachment after the crimping process.

The positioning crimping tool according to the present invention has a crimping surface of a second work having an opening formed through the crimping surface of the first work having an opening formed through the crimping surface of the first work. It is a positioning crimping tool that crimps so that the relative position of the opening of the second work to the position of the opening is a predetermined position, and is provided with the positioning crimping mechanism having the first or second configuration. It is a feature.

With this configuration, it becomes possible to easily and surely carry out the crimping work that requires high positioning accuracy.

As described above, according to the present invention, the main block presses the vicinity of the opening edge of the second work, each peripheral driven block presses the edge region thereof, and the peripheral driven blocks move independently of each other to press. By making it possible to adjust the pressure according to the shape of the surface, even if the first work has an elastic curved surface, the center position of the opening of the second work can be set to a predetermined position on the upper surface of the first work. It is possible to crimp with high accuracy so as to be. Further, the crimping operation can be performed regardless of whether the first work is fixed or movable.

Further, the positional relationship between the central pressing surface and the peripheral pressing surface is such that the central pressing surface first abuts on the upper surface of the second work W2, and then each peripheral pressing surface abuts on the upper surface of the second work W2. If there is a good positional relationship, there are steps such as (1) alignment of the axis with the central 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 work is executed, and the positioning crimping work can be performed more accurately.

Further, the aiming attachment is fitted and inserted into the opening of the second work, and the relative positions of the openings (H1, H2) of the first work (W1) and the second work (W2) are positioned for aiming. By using the attachment for aiming, even if the opening (H1) of the first work (W1) is larger than the opening (H2) of the second work (W2), the attachment for aiming is first. If the size is adjusted to match the opening (H1) of the work (W1), accurate positioning and crimping can be performed.

It is a figure which shows the structure of the position determination crimping mechanism which concerns on Example 1 of this invention. It is a figure which shows the crimping operation of the position determination crimping mechanism 1 which concerns on this embodiment. It is a figure which shows the crimping operation of the position determination crimping mechanism 1 which concerns on this embodiment. It is a figure which shows the crimping operation of the position determination crimping mechanism 1 when the crimping surface F1a of the 1st work W1 is a concave surface. It is a figure which shows the modification of the position determination crimping mechanism which concerns on Example 1 of this invention. It is a side view of the position determination crimping tool which concerns on Example 2 of this invention. It is sectional drawing of the position determination crimping tool which concerns on Example 2 of this invention.

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

FIG. 1 is a diagram showing a configuration of a positional determination crimping mechanism according to a first embodiment of the present invention. 1A shows a state in which the second work W2 is attached to the positioning crimping mechanism 1, and FIG. 1B shows a state in which the second work W2 is removed from the positioning crimping mechanism 1. Represents. The positioning crimping mechanism 1 has a first position with respect to the crimping surface F2a of the second work W2 through which the opening H2 is formed and the crimping surface F1a of the first work W1 through which the opening H1 is formed. It is a mechanism for crimping 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 becomes 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 having an arbitrary shape. Further, the crimping surface F1a of the first work W1 and the crimping surface F2a of the second work W2 do not have to be flat, and may be curved.

In the following, the side surface of the first work W1 facing the second work W2 is the 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. Of these, the surface opposite to the crimping surface F2a is called the pressing surface F2b.

As shown in FIG. 1, the positioning crimping mechanism 1 of this embodiment has a main driving block 2, a central driven block 3, a first spring 4, an aiming attachment 5, a peripheral driven block 6, a second spring 7, and an extrusion block. It is equipped with 8 and a 3rd spring 9. The driving block 2 is a block for inputting a pressing force in one pressing direction (direction of arrow A in FIG. 1A). The "pressing direction" is the direction of pressing pressure. By "block" is meant a mechanical element that is displaced as a unit. The central driven block 3 is a block that is movably arranged within a certain stroke range on the pressing direction side of the driving block 1 in a state where the moving direction is restricted to a direction parallel to the pressing direction. A work attachment portion 3a, which is a portion to which the second work W2 is detachably attached, is formed on the pressing direction side of the central driven block 3. The “pressing direction side” means the side of the side end in the direction of the pressing force input to the driving block 2. Further, the side where the pressing force is input to the driving block 2 is referred to as the "pressing force side" (see FIG. 1A). The shape of the work attachment portion 3a is formed so that the second work W2 can be fitted. In FIG. 1, a boss portion B2 is formed so as to protrude around an opening H2 on the pressing surface F2b side of the second work W2, and the work attachment portion 3a has a concave portion in which the boss portion B2 can be fitted in the center. A depression is formed. The shape of the work attachment portion 3a may be such that the second work W2 can be attached according to the shape around the opening H2 of the second work W2. Further, although the configuration is different from that of FIG. 1, the aiming attachment 5 is attached by mounting a magnet (permanent magnet or an electromagnet) on the work attachment portion 3a and using the aiming attachment 5 as a ferromagnet. It is also possible to configure the work W2 to be attached to the work attachment portion 3a by a magnetic force.

The surface of the portion located at the tip of the work attachment portion 3a on the pressing direction side is the pressing surface around the opening H2 of the second work W2 in a state where the second work W2 is attached to the work attachment portion 3a. It is installed in F2b. This surface is referred to as a central pressing surface 3b. A central insertion hole 3c is formed in the center of the central pressing surface 3b. The central insertion hole 3c is formed to penetrate linearly in the pressing direction from the side of the central driven block 3c facing the main driven block 3 to the center of the work attachment portion 3a on the pressing direction side of the central driven block 3c. It is a 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. The peripheral driven blocks 6 are blocks arranged 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 movably arranged within a certain stroke range in a state where the moving direction is restricted to a direction parallel to the pressing direction of the driving block 2.

The number of 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 works W1 and W2 as uniform as possible, it is preferable that the peripheral driven blocks 6 are arranged symmetrically with respect to the central axes of the main driven block 2 and the central driven block 3.

The surface at the tip of each peripheral driven block 6 on the pressing direction side is called the peripheral pressing surface 6a, which faces the pressing surface of the second work W2, and when the pressing force is input from the driving block 2, the second The work W2 is applied to the peripheral portion of the pressing surface of the work W2 where the central pressing surface is applied. A second spring 7 is provided for each of the peripheral driven blocks 6. The second spring 7 is interposed between the main driving block 2 and each of the peripheral driven blocks 6. 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.

An extrusion block 8 is slidably provided in the central insertion hole 3c of the central driven block 3 so as to penetrate the central insertion hole 3c. The proximal end side (pressurizing side) of the extrusion block 8 protrudes from the pressing side surface of the central driven block 3, and the distal end surface on the proximal end side is the driving block when a pressing force is input from the driving block 2. It is applied to the surface on the pressing direction side of 2. On the other hand, the tip end side (pressing direction side) of the extrusion block 8 protrudes from the center of the recessed portion of the work attachment portion 3a formed on the pressing direction side of the central driven block 3, and the end surface on the tip end side is projected. When the pressing force is input from the driving block 2, it is applied to the surface on the pressing side of the aiming attachment 5, which will be described later. A third spring 9 is interposed between the central driven block and the extrusion block, and the third spring 9 urges the extrusion block 8 to push back in the direction opposite to the pressing direction.

In the aiming attachment 5, the portion on the base end side (pressing side) (hereinafter referred to as the fitting portion 5a) is detachably fitted in the opening H2 of the second work W2, and the tip side (pressing). This is a block in which a portion (hereinafter referred to as an insertion portion 5b) on the directional side) is fitted and inserted into the opening H1 of the first work W1. The fitting portion 5a on the base end side of the aiming attachment 5 is fitted into the second work W2 by fitting it into the opening H2 of the second work W2 from the pressing direction side of the second work W2. To. The insertion portion 5b on the tip end side of the aiming attachment 5 is fitted into the opening H1 of the first work W1 so as to fit into the opening H1, and the opening H1 is formed into a shape that can be inserted from the pressing side to the pressing direction side. Has been done. Further, in the aiming attachment 5, the fitting portion 5a is formed to have the same thickness as the insertion portion 5b or thinner than the insertion portion 5b, and the entire aiming attachment 5 forms the opening H1 of the first work W1. It is possible to pass through from the pressing side to the pressing direction side.

The operation of the positioning crimping mechanism according to the present embodiment configured as described above will be described below. 2 and 3 are views showing a crimping operation of the positioning crimping mechanism 1 according to the present embodiment. It operates in the order of FIG. 2 (a), FIG. 2 (b), FIG. 3 (a), and FIG. 3 (b). The second work W2 is positioned and crimped to the first work W1 so that the relative position of the opening H2 of the second work W2 is a predetermined position with respect to the opening H1 of the first work W1.

(Step 1)
First, as shown in FIG. 2A, the fitting portion 5a of the aiming attachment 5 is fitted into the opening H2 of the second work W2 from the side of the crimping surface F2a to fit the fitting portion 5a of the second work W2. The aiming attachment 5 is attached to the crimping surface F2a side. Then, the boss portion B2 of the second work W2 to which the aiming attachment 5 is fitted 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 fully extended. The peripheral pressing surface 6a at the tip of each peripheral driven block 6 is in a state of being separated from the pressing surface F2b of the second work W2, and the extrusion pressing surface 8a at the tip of the extrusion block 8 is the fitting portion 5a of the aiming attachment 5. It is in a state of being separated from the end face on the base end side of. At this time, the central pressing surface 3b of the central driven block 3 is in contact with the pressing surface F2b around the opening H2 of the second work W2.

In this way, the position determination crimping mechanism 1 is positioned by attaching the second work W2 to which the aiming attachment 5 is fitted to the work attachment portion 3a of the central driven block 3 before crimping. When applied to a crimping tool, the aiming attachment 5 and the second work W2 can be carried together with the position-determining crimping tool to which the aiming attachment 5 and the second work W2 are attached, which increases the convenience in performing the work and improves the usability.

Further, here, the work procedure will be described as first attaching the second work W2 to which the aiming attachment 5 is fitted to the work attachment portion 3a, but first, the aiming attachment 5 will be described. It is also possible to perform a work procedure in which the fitted second work W2 is fitted into the opening H1 of the first work W1 for positioning, and then brought to the work holding portion 3a.

(Step 2)
Next, as shown in FIG. 2B, the positioning crimping mechanism 1 equipped with the second work W2 and the aiming attachment 5 is brought closer to the opening H1 from the side of the crimping surface F1a of the first work W1. The insertion portion 5b of the aiming attachment 5 is inserted into the opening H1 so that the crimping surface F2a of the second work W2 is applied to the crimping surface F1a of the first work W1. At this time, since the insertion portion 5b of the aiming attachment 5 is formed in a shape that fits into the opening H1 of the first work W1, it is automatically inserted by inserting the insertion portion 5b into the opening H1. Therefore, the relative position of the second work W2 with respect to the first work W1 is positioned at a predetermined position. Further, 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 positioned in a predetermined orientation.

(Step 3)
Next, as shown in FIG. 3A, the pressing force is input to the driving block 2 in the direction of the arrow A (pressing direction). At this time, the central pressing surface 3b of the central driven block 3 is placed on the pressing surface F2b of the second work W2, and the crimping surface F2a of the second work W2 is on the crimping surface F1a of the first work W1. Since it is installed, the central driven block 3 cannot be displaced in the pressing direction by pressing the first work W1. Therefore, 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 connection with this, the crimping surface F2a around the opening H2 of the second work W2 is applied. Is crimped to the crimping surface F1a around the opening H1 of the first work W1.

On the other hand, since each peripheral driven block 6 is connected to the driving block 2 by the second spring 7, the driving block 2 is displaced in the pressing direction A in conjunction with the displacement in the pressing direction A. Then, at the stage of being displaced by a certain distance, the peripheral pressing surface 6a on the tip 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 is applied (hereinafter, "center"). It reaches and abuts on the peripheral portion (hereinafter referred to as "peripheral pressing portion") of the "pressing portion") (see FIG. 3A).

Further, the end surface 8b on the base end side of the extrusion block 8 is pressed by the extrusion block 8 by the displacement of the driving block 2 in the pressing direction A, and the extrusion block 8 is pressed in the pressing direction while compressing the third spring 9 in association with the extruded block 8. Displace to A. Then, at the stage of being displaced by a certain distance, the extrusion pressing surface 8a on the tip end side of the extrusion block 8 reaches and abuts on the proximal end side end surface of the fitting portion 5a of the aiming attachment 5 (see FIG. 3A). ).

(Step 4)
Next, as shown in FIG. 3 (b), when the driving block 2 further ranges 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 crimping surface F2a around the opening H2 of the second work W2 is further strongly crimped to the crimping surface F1a around the opening H1 of the first work W1.

Further, 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 crimping surface F2a of the second work W2 is on the crimping surface F1a of the first work W1. Since it is installed, the peripheral driven block 6 cannot be displaced in the pressing direction by pressing the first work W1. Therefore, 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. As a result, 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 in connection with this, the crimping surface F2a of the peripheral pressing portion of the second work W2 is formed. , The first work W1 is crimped to the crimping surface F1a around the opening H1. In this way, first, the central pressing portion of the second work W2 in the vicinity of the openings H1 and H2 is first crimped to the crimping surface F1a of the first work W1, and then the second work W2. The peripheral pressing portion around the central pressing portion is crimped to the crimping surface F1a of the first work W1 while gradually increasing the crimping force. In this way, the crimping is performed stepwise from the periphery of the central pressing portion to the peripheral pressing portion with a time lag, so that the vicinity of the openings H1 and H2 of the first work W1 and the second work W2 at the time of crimping. Even if strain is generated due to the pressing force, 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 or the peripheral portion, so that the strain is even and distorted around the openings H1 and H2. It is possible to realize a crimping process with extremely little misalignment due to the above.

On the other hand, the extrusion pressing surface 8a of the extrusion block 8 is provided on the base end side end surface of the fitting portion 5a of the aiming attachment 5, and the extrusion block 8 is pressed by the driving block 2 via the third spring 9. Therefore, the extrusion block 8 applies a gradually increasing pressing force in the pressing direction A to the aiming attachment 5. When this pressing force exceeds a certain limit, the aiming attachment 5 is pulled out from the opening H2 of the second work W2, passes through the opening H1 of the first work W1, and is extruded in the pressing direction A. Will be removed. As a result, the work of separately removing the aiming attachment 5 after crimping is omitted.

Next, a case where the crimping surface F1a of the first work W1 is not a flat surface will be described. FIG. 4 is a diagram showing a crimping operation of the positioning crimping mechanism 1 when the crimping surface F1a of the first work W1 is a concave surface. First, as in the case described with reference to FIG. 2B, the insertion portion 5b of the aiming attachment 5 attached via the second work W2 is inserted into the work attachment portion 3a of the central driven block 3. By inserting the first work W1 into the opening H1, the relative position of the second work W2 with respect 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 in close contact with each other. .. Subsequently, when a pressing force is applied to the driven block 2 in the pressing direction of the arrow A, the central pressing surface 3b at the tip of the work attachment portion 3a of the central driven block 3 presses around the opening H2 of the second work W2. The surface F2b is pushed in the pressing direction, the second work W2 bends along the crimping surface F1a of the first work W1, and the crimping surface F1a and the crimping surface F2a are completely in close contact with 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 applied. .. Therefore, since the pressing force is not applied to the edge region of the second work W2, the misalignment due to the bending of the second work W2 is prevented. Then, when the 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 entire work W2 of 2 is crimped to the first work W1 (FIG. 4 (c)). At this time, since the peripheral driven blocks 6 move independently of each other, no matter what curved surface the surface of the first work W1 is, the pressing force when pressing the crimping surface F1a of the first work W1. Even if distortion occurs due to the above, each peripheral driven block 6 presses the peripheral pressing portion of the second work W2 according to the shape of the crimping surface F1a of the first work W1, depending on the shape of the crimping surface F1a. The crimping process is performed accurately. In addition, each peripheral driven block 6 adapts to the surface shape of the first work W1 and specifically applies this positional determination crimping mechanism 1 so that the second work W2 can be pressed more evenly. In this case, it is preferable to configure the tip of each peripheral driven block 6 so that the tip portion (pressing head 6b (see FIGS. 6 and 7)) can be freely rotated.

Further, as a modification of the positioning crimping mechanism 1 of this embodiment, the configuration as shown in FIG. 5 can be used. The position determination crimping mechanism 1 of FIG. 5 is a distance sensor for detecting the displacement of the central driven block 3 with respect to the main drive block 2 at the point where the inclined guide portion 5c is provided at the tip portion of the insertion portion 5b of the aiming attachment 5. 20 (displacement detecting means) is provided, a spring shaft 2c is provided between the main driven block 2 and each peripheral driven block 6, and the position of the first spring 4 is set to the central driven block 3 and each peripheral driven block 6. It is different from the case of FIG. 1 in that the point moved between the two springs 7 and the position of the second spring 7 moved between the driving block 2 and each spring shaft 2c. Here, each of the first spring 4 and each second spring 7 is a compression spring. 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 tip on the pressing direction side of the spring shaft 2c and the pressing head 6c at the tip on the pressing side of the peripheral driven block 6 facing the pressing head 2d are always in contact with each other due to the elastic force of the first spring 4 and the second spring 7. They are in a pressed state.

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

Further, by detecting the displacement amount of the central driven block 3 with respect to the main driven block 2 (the amount of change of the distance ds1 in FIG. 5) by the distance sensor 20, the pressing force by the first spring 4 can be detected. As a result, when the displacement detected by the distance sensor 20 reaches a predetermined target value, the pressing input to the main block 2 is stopped, so that the second work W2 is crimped to the first work W1. It is possible to accurately adjust the pressing force. In addition, when performing a large number of positioning crimping operations, it is possible to accurately check whether the specified pressing pressure has been reached each time, so insufficient pressing pressure (halfway pressing) or excessive pressing pressure (too strong pressing). ) Can be prevented from occurring, unevenness (variation) in the pressing force can be eliminated, and the quality of the product manufactured by the positioning crimping work can be improved.

When the aiming attachment 5 is inserted into the first work W1 and the crimping surface F1a of the first work W1 and the crimping 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 and the pressing head 6c of the peripheral driven block 6 are in contact with each other, the pressing force applied to the spring shaft 2c is transmitted to the peripheral driven block 6 as it is. Both the first spring 4 and the second spring 7 are compressed by this pressing force, but since the spring constant of the first spring 4 is set to be smaller than the spring constant of the second spring 7, the first spring constant is set. 1 Spring 4 is compressed more. Further, the central 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. It rises as it is displaced, and becomes constant after the peripheral pressing surface 6a abuts on the pressing surface F2b of the second work W2. When the peripheral pressing surface 6a abuts on the pressing surface F2b of the second work W2, the peripheral driven block 6 cannot be displaced any further, so that the compression of the first spring 4 stops there, and only the second spring 7 is compressed this time. .. 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 pressing surface 6a of the peripheral driven block 6 to the second work W2 The pressing force applied to the pressing surface F2b increases 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 cross-sectional view of the positioning crimping tool according to the second embodiment of the present invention. In FIGS. 6 and 7, among the constituent parts of the positional determination crimping tool 10, the portions corresponding to the constituent parts of the positional determination crimping mechanism 1 (FIG. 1) of the first embodiment are designated by the same reference numerals. In FIGS. 6 and 7, a columnar handle 2a is formed on the base end side of the main block 2, and a worker using the positioning crimping tool 10 holds the handle 2a to perform positioning crimping work. conduct.

A concave work attachment portion 3a is formed on the pressing direction side of the central driven block 3 (see FIG. 7). The work attachment portion 3a is formed in a structure in which the boss portion B2 of the second work W2 to which the aiming attachment 5 is attached can be magnetically attached, and the boss portion B2 is attached to the work attachment portion 3a by magnetic force. As a result, the second work W2 is attached to the work attachment portion 3a. Therefore, a magnet is provided inside the work attachment portion 3a, and the aiming attachment 5 is made of a ferromagnetic material. Cylindrical rod-shaped linear shafts 3d and 3d are provided so as to project from the end surface of the central driven block 3 on the pressing side in parallel with the pressing direction A, and the end portions of the linear shafts 3d and 3d on the pressing side are driven blocks. It is slidably inserted into linear bushes 2b and 2b (cylindrical linear motion mechanism for rolling guidance; linear ball bearing) provided on the end face on the pressing direction side of No. 2 (see FIG. 7). A first spring 4 for pressing and urging the tip surface of the linear shaft 3d toward the pressing direction is provided in the cylinder of each linear bush 2b.

Guide portions 5c and 5c having a conical pointed tip are provided at both ends of the end surface of the aiming attachment 5 on the pressing direction side in the longitudinal direction. The guide portions 5c and 5c function as guides when the aiming attachment 5 is inserted into the opening H1 of the first work W1. By providing the guide portions 5c and 5c, the work process of inserting the aiming attachment 5 into the opening H1 of the first work W1 becomes easy.

The peripheral driven block 6 is composed of a metal rod-shaped body having a circular cross section parallel to the pressing direction A. The peripheral driven block 6 is slidably inserted into a linear bush 3e provided on a side portion of the central driven block 3 in the middle portion thereof. A cylindrical pressing head 6b having an enlarged diameter is provided at the end of the peripheral driven block 6 on the pressing direction side, and the tip surface of the pressing head 6b is the peripheral pressing surface 6a. A pressing head 6c made of a hexagon nut is provided at the end of the peripheral driven block 6 on the pressing side, and the pressing head 6c and the linear bush 3e are coaxial with the central axis of the peripheral driven block 6. A return spring 7a is provided. The return spring 7a urges the pressing head 6c toward the pressing side. Further, a spring shaft 2c is provided so as to project toward the pressing direction at a position facing each peripheral driven block 6 on the pressing direction side of the driving block 2. A pressing head 2d made of a hexagon nut is provided at the tip of the spring shaft 2c on the pressing direction side, and the pressing head 2d abuts on the pressing head 6c of the facing peripheral driven block 6. The press-fitting head 2d of the spring shaft 2c is urged in the pressing direction A by a second spring 7 coaxially mounted on its central axis.

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

As described above, when the position determination crimping operation is performed by the position determination crimping tool 10 using the position determination crimping mechanism 1 of the first embodiment, the operator first aims at the work attachment portion 3a of the central driven block 3. The second work W2 with the attachment 5 is fitted. Then, the operator holds the handle 2a of the main block 2 in his hand and inserts the aiming attachment 5 into the opening H1 (see FIG. 1) of the first work W1. At this time, since the tip of the pointed columnar guide portions 5c and 5c provided in the aiming attachment 5 is inserted into the opening H1, the aiming attachment 5 is appropriate by the guide portions 5c and 5c at the time of insertion. It is guided to a suitable position, and accurate positioning is easily performed. Then, the operator can perform the positioning crimping work by holding the handle 2a of the driving block 2 and applying 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.

1 Positioning crimping mechanism 2 Main driving block 2a Handle 2b Linear bush 2c, 2e Spring shaft 2d, 2f Pressing head 3 Central driven block 3a Work attachment 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 Insertion part 5c Guide part 6 Peripheral driven block 6a Peripheral pressing surface 6b Pressing head 6c Pressing head 7 Second spring 7a Return spring 8 Extruding block 8a Extruding pressing surface 8b Pressing head 8c Pressing head 9 3rd spring 9a Return spring 10 Positioning crimping tool 20 Distance sensor W1 1st work F1a Crimping surface H1 Opening W2 2nd work F2a Crimping surface F2b Pressing surface H2 Opening B2 Boss

Claims (3)

The second work with respect to the crimping surface of the second work through which the opening is formed through and the crimping surface of the first work through which the opening is formed with respect to the position of the opening of the first work. It is a positioning crimping mechanism that crimps so that the relative position of the opening is in a predetermined position.
The driving block, which is a block for inputting the pressing force in one pressing direction,
A central driven block, which is a block movably arranged within a certain stroke range in a state where the moving direction is restricted to a direction parallel to the pressing direction, on the pressing direction side of the driving block.
A first spring that transmits the pressing force input to the driven block to the central driven block and urges the central driven block in the pressing direction.
A work attachment portion provided on the pressing direction side of the central driven block, which is a portion to which the second work is detachably attached, and a work attachment portion.
A surface located at the tip of the work attachment portion on the pressing direction side, and a central pressing surface provided on the pressing surface on the opposite side of the crimping surface around the opening of the second work.
The proximal end side portion is formed to have the same thickness as the distal end side portion or thinner than the distal end side portion, and the proximal end side portion is detachably fitted in the opening of the second work and is fitted to the distal end side. An aiming attachment whose portion is fitted and inserted into the opening of the first work,
A plurality of pieces are arranged on the pressing direction side of the driving block so as to surround the work attachment portion, and the moving direction is restricted to a direction parallel to the pressing direction of the driving block, and the moving is within a certain stroke range. Freely arranged peripheral driven blocks and
A second spring provided for each of the peripheral driven blocks, which transmits the pressing force input to the driven block to the peripheral driven block and urges the peripheral driven block in the pressing direction.
A surface located at the tip of each peripheral driven block on the pressing direction side, and a peripheral pressing surface of the pressing surface of the second work, which is applied to a peripheral portion of a portion to which the central pressing surface is applied. Positioning crimping mechanism with. A central insertion hole formed so as 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 extrusion block that is slidably inserted into the central insertion hole, the base end side is pushed by the main driving block, and the tip side protrudes from the central surface of the work attachment portion on the pressing direction side of the central driven block. When,
The positioning crimping mechanism according to claim 1, further comprising a third spring interposed between the central driven block and the extrusion block to urge the extrusion block in a direction opposite to the pressing direction. The second work with respect to the crimping surface of the second work through which the opening is formed through and the crimping surface of the first work through which the opening is formed with respect to the position of the opening of the first work. A positioning crimping tool for crimping so that the relative position of the opening is a predetermined position, wherein the positioning crimping tool is provided with the positioning crimping mechanism according to claim 1 or 2.

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