JP2016008673A - Fastening device and fastening method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost of an assembly of a hose and a joint fitting and improve the quality thereof.SOLUTION: When an end part of a hose 10 is inserted into a joint fitting 20, a fastening claw 40 at a part of the joint fitting having the end part of the hose 10 inserted therein is moved to the inside in the radial direction of the hose 10 to fasten the part of the joint fitting, an outer diameter Do of an outer surface rubber layer 16 and a wall thickness do of the outer surface rubber layer 16 are measured and then an outer diameter Dm of a reinforcing layer 14 is calculated as Dm=Do-2*do. Then, when an inner diameter of the inner surface rubber layer 12 is Di, a wall thickness A ranging from an inner circumferential surface 1202 of the inner surface rubber layer 12 to an outer circumferential surface 1404 of the reinforcing layer 14 is calculated as A=(Dm-Di)/2. The amount of motion of the fastening claw 40 toward the inside in the radial direction of the hose 10 is controlled on the basis of the wall thickness A before fastening.

Description

  The present invention relates to a caulking device and a caulking method.

In order to connect the hose to the equipment, a fitting is provided that is attached to the end of the hose.
To attach the fitting bracket to the hose end, insert the end of the hose into the fitting bracket, move the crimping claw to the inside of the hose in the radial direction of the fitting bracket where the hose end is inserted, and This is done by caulking the part (see Patent Document 1).
When caulking the joint metal part, it is necessary that the hose caulking rate be the target caulking rate. The caulking rate is a numerical value indicating a ratio obtained by dividing the difference in the thickness of the hose before and after the caulking by the thickness of the hose before caulking.
As a hose to be attached to the joint metal fitting, a hose provided with an inner rubber layer, a reinforcing layer formed outside the inner rubber layer, and an outer rubber layer formed outside the reinforcing layer may be used.
In this case, after removing the outer rubber layer portion from the end portion of the hose to be crimped to the fitting, the exposed outer diameter of the reinforcing layer and the inner diameter of the inner rubber layer are measured with a measuring instrument such as a caliper. Then, the thickness of the inner rubber layer and the reinforcing layer is calculated as the thickness of the hose based on the measured value, the caulking rate is obtained based on the thickness of the hose, and the movement amount of the caulking claw is controlled. Therefore, the caulking rate is set to the target value.

JP 2010-266004 A

However, when the joint metal fitting is crimped to the hose after the outer surface rubber layer is partially removed, a process for removing the outer surface rubber layer is required, which is disadvantageous in reducing the cost.
Therefore, it is conceivable that the outer rubber layer is caulked with the joint metal part without removing the outer rubber layer.
In this case, the sealing performance and grip force of the hose with respect to the fitting are secured by the inner rubber layer and the reinforcing layer, and the outer rubber layer has no function to secure the sealing performance and grip force. It is not necessary to consider the thickness of the outer rubber layer.
Therefore, even if the outer rubber layer is caulked together with the fitting metal part without removing the outer rubber layer, the thickness of the inner rubber layer and the reinforcing layer is calculated as the thickness of the hose. It is preferable that the caulking rate becomes a target value by controlling the amount of movement of the caulking claw based on the above.
However, when the outer rubber layer is not removed, it is difficult to measure the outer diameter of the reinforcing layer, so the caulking rate is calculated assuming the outer diameter of the reinforcing layer. For this reason, it is difficult to calculate an accurate caulking rate due to the influence of variations in the outer diameter of the reinforcing layer, which is disadvantageous in caulking the joint fitting portion with an optimum caulking rate. For this reason, there is a concern that the assembly of the hose and the fitting fitting may be defective due to insufficient or excessive caulking of the fitting fitting portion with respect to the end portion of the hose.
The present invention has been made in view of such circumstances, and an object thereof is to provide a caulking apparatus and a caulking method that are advantageous in reducing the cost and improving the quality of an assembly of a hose and a fitting. It is in.

In order to achieve the above object, an invention according to claim 1 includes an inner rubber layer, a reinforcing layer formed outside the inner rubber layer, and an outer rubber layer formed outside the reinforcing layer. When inserting the end of the hose into the fitting, moving the caulking claw inward in the radial direction of the hose at the portion of the fitting where the end of the hose is inserted, and caulking the portion of the fitting, The outer diameter Do of the outer surface rubber layer and the wall thickness do of the outer surface rubber layer are measured, and the outer diameter Dm of the reinforcing layer is obtained from the following equation (1), and Dm = Do−2 · do. 1) When the inner diameter of the inner rubber layer is Di, the thickness A from the inner peripheral surface of the inner rubber layer to the outer peripheral surface of the reinforcing layer is obtained from the following equation (2), and A = (Dm− Di) / 2 (2), the difference between the thickness A before caulking and the thickness A after caulking The numerical value divided by the wall thickness A before caulking is calculated as the caulking rate, and the caulking rate is based on the wall thickness A before caulking so that the caulking rate becomes a predetermined target caulking rate. The amount of movement of the caulking claw inward of the hose in the radial direction is controlled.
In the invention according to claim 2, the thickness do of the outer rubber layer is measured by measuring the distance from the outer circumferential surface of the outer rubber layer to the outer circumferential surface of the reinforcing layer in contact with the outer circumferential surface of the outer rubber layer. It is characterized by using a distance sensor.
According to a third aspect of the present invention, there are provided the two distance sensors that are opposed to each other across the hose on the diameter of the hose so as to be movable away from the outer peripheral surface of the outer rubber layer. The outer diameter Do of the layer is measured by detecting the distance between the two distance sensors that are in contact with the outer peripheral surface of the outer rubber layer.
The invention according to claim 4 is characterized in that the distance sensor is an electromagnetic induction distance sensor or an ultrasonic distance sensor.
According to a fifth aspect of the present invention, an end portion of a hose comprising an inner rubber layer, a reinforcing layer formed outside the inner rubber layer, and an outer rubber layer formed outside the reinforcing layer is used as a joint fitting. A caulking device that inserts and moves a caulking claw inwardly in the radial direction of the hose at a portion of the joint fitting into which the end portion of the hose is inserted, and caulks the portion of the joint fitting, wherein the outer rubber The outer diameter Do of the layer and the wall thickness do of the outer rubber layer are measured, and the outer diameter Dm of the reinforcing layer is obtained from the following equation (1). Dm = Do−2 · do (1), When the inner diameter of the inner rubber layer is Di, a hose thickness measuring unit for obtaining a thickness A from the inner peripheral surface of the inner rubber layer to the outer peripheral surface of the reinforcing layer from the following equation (2), A = (Dm−Di) / 2 (2), the thickness A before caulking and the thickness A after caulking A numerical value obtained by dividing the difference by the thickness A before caulking is calculated as a caulking rate, and based on the thickness A before caulking so that the caulking rate becomes a predetermined target caulking rate. A caulking control unit that controls an amount of movement of the caulking claw inward in the radial direction of the hose.
The invention according to claim 6 is characterized in that the hose thickness measuring unit is a distance sensor that contacts the outer peripheral surface of the outer rubber layer and measures the distance from the outer peripheral surface of the outer rubber layer to the outer peripheral surface of the reinforcing layer. And an outer surface rubber layer thickness calculating unit that calculates a thickness do of the outer surface rubber layer based on a detection result of the distance sensor in contact with an outer peripheral surface of the outer surface rubber layer.
The invention according to claim 7 is provided such that the two distance sensors facing each other across the hose on the diameter of the hose are movably provided in a direction approaching and separating from the outer peripheral surface of the outer rubber layer. The outer diameter Do of the layer is measured by detecting the distance between the two distance sensors that are in contact with the outer peripheral surface of the outer rubber layer.
The invention according to claim 8 is characterized in that the distance sensor is an electromagnetic induction type distance sensor or an ultrasonic distance sensor.

According to the first and fifth aspects of the invention, without removing the outer rubber layer, the actual thickness of the reinforcing layer and the inner rubber layer contributing to the sealing performance and grip force of the hose with respect to the fitting is measured and reinforced. Caulking is performed so that the caulking rate calculated based on the actual wall thickness A of the layer and the inner rubber layer becomes the target caulking rate.
Therefore, the joint fitting can be crimped to the end of the hose at an optimum crimping rate while omitting the step of removing the outer rubber layer. Therefore, while reducing the cost of the assembly of the hose and the fittings, it is possible to reduce defects caused by insufficient or excessive tightening of the fitting parts with respect to the ends of the hose. This is advantageous in improving the quality of the assembly.
According to the second and sixth aspects of the invention, the thickness do of the outer rubber layer can be accurately measured without removing the outer rubber layer, and the reinforcing layer contributes to the sealing performance and grip force of the hose with respect to the fitting. This is advantageous in accurately measuring the actual wall thickness A of the inner rubber layer.
According to the third and seventh aspects of the invention, the outer diameter Do of the outer rubber layer is measured simultaneously with the measurement of the outer rubber layer thickness do using the distance sensor that measures the outer rubber layer thickness do. Can be done. Therefore, the structure for measuring the outer diameter Do of the outer rubber layer can be simplified, and it is advantageous for shortening the measurement time of the outer diameter Do of the outer rubber layer.
According to the fourth and eighth aspects of the invention, it is advantageous to reliably measure the thickness do of the outer rubber layer with a simple configuration.

It is sectional drawing which shows the structure of the hose which the crimping method of this Embodiment makes object. It is sectional drawing which fractured | ruptured the hose in the plane orthogonal to the axis line of a hose. It is a side view explaining the state by which a coupling metal fitting is crimped by the crimping apparatus. It is a block diagram which shows the structure of a crimping apparatus. It is explanatory drawing which shows the measurement state of the hose by a crimping apparatus. It is A arrow directional view of FIG. It is an operation | movement flowchart of a crimping apparatus.

Next, the caulking device according to the embodiment of the present invention will be described together with the caulking method.
First, the joint metal fitting used as the object of the present invention will be described.
As shown in FIGS. 1 and 2, the hose 10 includes an inner rubber layer 12, a reinforcing layer 14 formed outside the inner rubber layer 12, and an outer rubber layer 16 formed outside the reinforcing layer 14. I have.
Reference numeral 1202 indicates an inner peripheral surface of the inner rubber layer 12, reference numeral 1204 indicates an outer peripheral surface of the inner rubber layer 12, reference numeral 1402 indicates an inner peripheral surface of the reinforcing layer, reference numeral 1404 indicates an outer peripheral surface of the reinforcing layer 14, Reference numeral 1602 denotes an inner peripheral surface of the outer rubber layer 16, and reference numeral 1604 denotes an outer peripheral surface of the outer rubber layer 16.
In the present embodiment, the reinforcing layer 14 is configured by winding a metal wire around the outer peripheral surface 1204 of the inner rubber layer 12 in a spiral shape, or a metal wire is braided on the outer peripheral surface 1204 of the inner rubber layer 12. Is made up of.
The reinforcing layer 14 is not limited to one layer, and may be two or more layers. When the hose 10 includes two or more reinforcing layers 14, an intermediate rubber layer may be formed between the adjacent reinforcing layers 14.

Next, the joint fitting will be described.
As shown in FIG. 3, the joint fitting 20 is connected to the end of the hose 10 and appropriately supplies the fluid flowing through the hose 10 to the device or appropriately discharges the fluid from the device.
The joint fitting 20 includes a nipple 22 and a socket 24 that are coupled to each other.

  The nipple 22 is made of metal, and includes a base portion 26, a nut portion 28, a flange portion 30, and a nipple side cylindrical portion 32 arranged on the same axis.

The base portion 26 is a portion that is detachably attached to and detached from the device as appropriate, and has a cylindrical shape.
The nut portion 28 is provided in a hexagonal column shape at the end of the base portion 26.
The flange portion 30 is provided adjacent to the nut portion 28, and a concave groove 3002 for attaching the socket 24 is formed between the flange portion 30 and the nut portion 28.

The nipple side cylindrical portion 32 is a portion inserted into the inner peripheral surface 1202 of the inner rubber layer 12 of the hose 10. The nipple side cylindrical portion 32 protrudes from the flange portion 30, and thus the flange portion 30 can abut on the end portion of the hose 10.
On the outer peripheral surface of the nipple side tubular portion 32, a plurality of engaging irregularities 3202 extending in the circumferential direction are formed at intervals in the axial direction.

The socket 24 is made of metal and has a cylindrical shape.
The socket 24 is configured by arranging a cylindrical mounting portion 34 and a socket-side cylindrical portion 36 on the same axis.

The attachment portion 34 is attached by being crimped to the concave groove 3002.
A plurality of locking projections 3602 extending in the circumferential direction are formed on the inner peripheral surface of the socket-side cylindrical portion 36 at intervals in the axial direction.
In a state where the attachment portion 34 is attached to the concave groove 3002, the socket-side tubular portion 36 is positioned coaxially with the nipple-side tubular portion 32 and radially outside the nipple-side tubular portion 32.

The annular space S into which the end of the hose 10 is inserted is formed between the outer peripheral surface of the nipple side cylindrical portion 32 and the inner peripheral surface of the socket side cylindrical portion 36.
In the annular space S, one end in the axial direction of the nipple side tubular portion 32 and the socket side tubular portion 36 is an opening, and the other end in the longitudinal direction is closed by a flange 30 and a mounting portion 34.
There are various types of joint fittings 20, and the device and method of the present invention can be applied to all of the joint fittings 20 having the nipple side tubular portion 32 and the socket side tubular portion 36 and in which the annular space S is formed. Applicable.

Next, the caulking device will be described.
As shown in FIG. 3, the caulking device 38 deforms the socket-side tubular portion 36, which is a joint metal fitting portion, in the radial direction with the end portion of the hose 10 inserted into the annular space S, and caulks. The joint fitting 20 is attached to the hose 10 in a state where the entire circumference of the inner peripheral surface 1202 of the inner rubber layer 12 of the hose 10 is in close contact with the entire circumference of the outer peripheral surface of the nipple side tubular portion 32. The assembly is obtained.
In addition, by crimping the socket-side tubular portion 36, the end portion of the hose 10 has a plurality of engaging irregularities 3202 on the outer peripheral surface of the nipple-side tubular portion 32 and the inner periphery of the socket-side tubular portion 36. The joint fitting 20 is designed to be securely attached to the hose 10 by being sandwiched between the plurality of locking projections 3602 on the surface.
As shown in FIG. 4, the crimping device 38 includes a plurality of crimping claws 40 (dies), a crimping actuator 42, a distance sensor 44, a sensor moving actuator 46, a linear position sensor 48, and a control. The apparatus 50 is comprised.

The plurality of crimping claws 40 are for crimping the joint fitting 20 to the hose 10.
As shown in FIG. 3, the caulking claws 40 are arranged in a circumferential direction on a circumference around a single virtual axis Z, and can be moved in the radial direction by the operation of the caulking actuator 42. The amount of movement of each caulking claw 40 in the radial direction is the same.
In the present embodiment, the inner peripheral surface of the caulking claw 40 is a cylindrical surface centered on a single virtual axis Z, but extends in the circumferential direction on the inner peripheral surface of the caulking claw 40. A plurality of protruding ridges may be formed.

The caulking actuator 42 moves the caulking claw 40 in the radial direction, and the control device 50 controls the amount of movement of the caulking claw 40 in the radial direction.
As the caulking actuator 42, various conventionally known actuators can be used.
As the caulking actuator 42, for example, a hydraulic cylinder that expands and contracts when hydraulic oil is supplied from a hydraulic pump can be used.
In this case, the caulking claw 40 moves inward in the radial direction by extending the hydraulic cylinder, deforms and caulks the socket side tubular portion 36 inward in the radial direction, and the caulking pawl is caused by contraction of the hydraulic cylinder. 40 moves radially outward and is separated from the socket-side tubular portion 36.
In addition, as the caulking actuator 42, an electric cylinder including a rod that expands and contracts by a feed screw that is rotated forward and backward by a motor can be used.
In this case, the caulking claw 40 moves inward in the radial direction by extending the rod, deforms and caulks the socket side tubular portion 36 inward in the radial direction, and the caulking claw 40 is contracted by contracting the rod. It moves outward in the radial direction and is separated from the socket-side tubular portion 36.

The distance sensor 44 abuts on the outer peripheral surface 1604 of the outer rubber layer 16 and measures the distance from the outer peripheral surface 1604 of the outer rubber layer 16 to the outer peripheral surface 1404 of the reinforcing layer 14, thereby making the wall thickness do of the outer rubber layer 16. (See FIG. 2).
In the present embodiment, an electromagnetic induction distance sensor 44 is used as the distance sensor 44.
The electromagnetic induction type distance sensor 44 generates a high-frequency magnetic field by a coil to generate an eddy current in a metal measurement object, and the impedance of the coil is changed by the eddy current, and the coil and the measurement are performed based on the change in the oscillation state. The distance to the object is detected.

In the present embodiment, as shown in FIGS. 5 and 6, when an X axis and a Y axis that pass through the axis C of the hose 10 and are orthogonal to each other on a plane orthogonal to the axis C of the hose 10 are assumed, , The first and second electromagnetic induction type distance sensors 44A and 44B are disposed at two positions sandwiching the hose 10, and the third and fourth electromagnetic induction distance sensors 44C are disposed at two positions sandwiching the hose 10 on the Y axis. 44D is arranged.
The first and second electromagnetic induction type distance sensors 44A and 44B move in a direction (diameter direction of the hose 10) in contact with and away from the hose 10 on a pair of rails 52 extending in the X-axis direction across the hose 10. It is held by a slider 54 that can be provided.
The third and fourth electromagnetic induction type distance sensors 44C and 44D move in a direction (diameter direction of the hose 10) in contact with and away from the hose 10 on a pair of rails 52 extending in the Y-axis direction with the hose 10 interposed therebetween. It is held by a slider 54 that can be provided.
That is, the first and second electromagnetic induction type distance sensors 44A and 44B and the third and fourth electromagnetic induction type distance sensors 44C and 44D are opposed to each other on the diameter of the hose 10 with the hose 10 in between. The rubber layer 16 is provided so as to be movable in a direction approaching and separating from the outer peripheral surface 1604 of the rubber layer 16.
The first to fourth electromagnetic induction distance sensors 44 </ b> A to 44 </ b> D have the detection surface 4402 facing the outer peripheral surface of the hose 10, that is, the outer peripheral surface 1604 of the outer rubber layer 16, while being held by the slider 54.
The first to fourth electromagnetic induction type distance sensors 44 </ b> A to 44 </ b> D supply the detection results to the control device 50.
In the present embodiment, each rail 52 and each slider 54 constitute a guide portion.
In FIG. 5, the rail 52, the slider 54, the sensor moving actuator 46, and the linear position sensor 48 are not shown.

The sensor moving actuator 46 reciprocates each slider 54 along the rail 52, and various conventionally known actuators such as an air cylinder and an electric cylinder can be used as the sensor moving actuator 46.
When the slider 54 is reciprocated by the sensor moving actuator 46, the first to fourth electromagnetic induction type distance sensors 44 </ b> A to 44 </ b> D are retracted positions (P <b> 0) where the detection surface 4402 is separated from the outer peripheral surface 1604 of the outer rubber layer 16. ) And the measurement position (P1) where the detection surface 4402 is in contact with the outer peripheral surface 1604 of the outer rubber layer 16.
The reciprocating movement of the slider 54 by the sensor moving actuator 46 is controlled by the control device 50.

The linear position sensor 48 detects the position of the slider 54 with respect to the rail 52.
As such a linear position sensor 48, various conventionally known linear position sensors 48 such as a photoelectric or electromagnetic linear encoder (linear scale) can be used.
In this embodiment, as shown in FIGS. 4 and 6, the linear position sensor 48 includes a pair of X-axis side linear position sensors 48 </ b> A and 48 </ b> B provided on a pair of rails 52 provided along the X-axis. And a pair of Y-axis side linear position sensors 48C and 48D provided on a pair of rails 52 provided along the Y-axis.
Accordingly, the X-axis side linear position sensors 48A and 48B detect the position of the slider 54 along the X-axis direction, that is, the positions of the first and second electromagnetic induction distance sensors 44A and 44B.
The Y-axis side linear position sensors 48C and 48D detect the position of the slider 54 along the Y-axis direction, that is, the positions of the third and fourth electromagnetic induction distance sensors 44C and 44D.
The X-axis side linear position sensors 48A and 48B and the Y-axis side linear position sensors 48C and 48D supply the detection results to the control device 50.

As shown in FIG. 4, the control device 50 has an interface with a CPU, a ROM that stores and stores a control program, a RAM as an operation area of the control program, an EEPROM that holds various data in a rewritable manner, and peripheral circuits. The interface part etc. which take are comprised.
When the CPU executes the control program, the CPU functions as a caulking control unit 50A, an outer rubber layer outer diameter calculating unit 50B, an outer rubber layer thickness calculating unit 50C, and a hose thickness calculating unit 50D.

The control device 50 controls the sensor moving actuator 46 to move the first to fourth electromagnetic induction type distance sensors 44A to 44D to the measurement position P1, and the detection surface 4402 thereof is the outer rubber layer 16 of the hose 10. It is set as the state contact | abutted to the outer peripheral surface 1604 of this.
The outer rubber layer outer diameter calculation unit 50B is configured so that the detection surface 4402 of the first to fourth electromagnetic induction type distance sensors 44A to 44D is in contact with the outer peripheral surface 1604 of the outer rubber layer 16 of the hose 10. The positions of the first and second electromagnetic induction distance sensors 44A and 44B supplied from the side linear position sensors 48A and 48B, and the third and fourth electromagnetic inductions supplied from the Y-axis side linear position sensors 48C and 48D. The positions of the formula distance sensors 44C and 44D are obtained.
Then, as shown in FIG. 2, the outer rubber layer outer diameter calculating unit 50B is configured to adjust the outer rubber layer 16 of the hose 10 in the X-axis direction based on the positions of the first and second electromagnetic induction distance sensors 44A and 44B. The outer diameter Do is calculated, and the outer diameter Do of the outer rubber layer 16 of the hose 10 in the Y-axis direction is calculated based on the positions of the third and fourth electromagnetic induction type distance sensors 44C and 44D. And the average outer diameter (henceforth average outer diameter Do) of the outer surface rubber layer 16 of the hose 10 is calculated | required by averaging those two outer diameters Do.
Thus, by calculating the average outer diameter Do, the measurement accuracy of the outer diameter of the outer rubber layer 16 is improved.

On the other hand, the outer surface rubber layer thickness calculation unit 50C is the first in a state where the detection surfaces 4402 of the first to fourth electromagnetic induction type distance sensors 44A to 44D are in contact with the outer peripheral surface 1604 of the outer surface rubber layer 16 of the hose 10. Based on the detection results supplied from the fourth electromagnetic induction type distance sensors 44A to 44D, the distance from the outer peripheral surface 1404 of the reinforcing layer 14 of the hose 10 to the outer peripheral surface 1604 of the outer rubber layer 16, that is, the outer rubber layer 16 The wall thickness do is obtained.
In the present embodiment, since the thickness do of the outer surface rubber layer 16 is obtained from the first to fourth electromagnetic induction type distance sensors 44A to 44D, the outer surface rubber layer thickness calculating unit 50C By averaging the wall thickness do of the outer rubber layer 16, the average wall thickness of the outer rubber layer 16 (hereinafter referred to as the average wall thickness do) is obtained.
Thus, by obtaining the average thickness do of the outer rubber layer 16, the measurement accuracy of the thickness of the outer rubber layer 16 is improved.

As shown in FIG. 2, the hose thickness calculation unit 50D calculates the outer diameter Dm of the reinforcing layer 14 based on the average outer diameter Do of the outer rubber layer 16 and the average thickness do of the outer rubber layer 16 as follows. Obtained from equation (1).
Dm = Do-2 · do (1)
Next, when the inner diameter of the inner rubber layer 12 is Di, the thickness A from the inner peripheral surface 1202 of the inner rubber layer 12 to the outer peripheral surface 1404 of the reinforcing layer 14, that is, the thickness A before caulking is expressed by the following equation: Calculate from (2).
A = (Dm−Di) / 2 (2)
A design value may be used as the inner diameter Di of the inner rubber layer 12, but using a value measured by a measuring instrument such as a caliper is more advantageous for improving the accuracy of the wall thickness A.

The caulking control unit 50A calculates a numerical value obtained by dividing the difference between the thickness A before caulking and the thickness A after caulking by the thickness A before caulking as the caulking rate α, and the caulking rate α Is controlled based on the thickness A before caulking, so that the caulking pawl 40 moves inward in the radial direction of the hose 10. Control the amount.
That is, the outer rubber layer 16 of the hose 10 is caulked by the joint metal fitting 20, but the thickness of the outer rubber layer 16 is not taken into account when calculating the caulking rate α.
This is because the sealing performance and gripping force of the hose 10 with respect to the joint fitting 20 are ensured by the inner rubber layer 12 and the reinforcing layer 14, and the outer rubber layer 16 has no function of ensuring sealing performance and gripping force. This is because it is not necessary to consider the thickness of the outer rubber layer 16 in obtaining the fastening rate α.
In the present embodiment, the first to fourth electromagnetic induction distance sensors 44A to 44D, the outer surface rubber layer thickness calculation unit 50C, the guide unit (rail 52 and slider 54), and the X-axis side linear position The sensors 48A and 48B, the Y-axis side linear position sensors 48C and 48D, the outer rubber layer outer diameter calculating unit 50B, and the hose thickness calculating unit 50D constitute a hose thickness measuring unit.

Next, operation | movement of the crimping apparatus 38 of this Embodiment is demonstrated with reference to the flowchart of FIG.
First, as shown in FIGS. 5 and 6, the outer rubber layer 16 is placed between the first to fourth electromagnetic induction distance sensors 44 </ b> A to 44 </ b> D located at the retracted position (P <b> 0) by a measurement positioning mechanism (not shown). Positioning is performed by arranging the end of the hose 10 from which no is removed (step S10). That is, the end portion of the hose 10 is positioned so that the axis C of the hose 10 is orthogonal to the X axis and the Y axis.

Next, the control device 50 controls each sensor moving actuator 46 to move the first to fourth electromagnetic induction type distance sensors 44A to 44D to the measurement position (P1). The outer rubber layer outer diameter calculation unit 50B includes the positions of the first and second electromagnetic induction distance sensors 44A and 44B supplied from the X-axis side linear position sensors 48A and 48B, and the Y-axis side linear position sensor 48C. , 48D, the average outer diameter Do of the outer rubber layer 16 of the hose 10 is obtained based on the positions of the third and fourth electromagnetic induction type distance sensors 44C, 44D supplied (step S12).
Next, the outer rubber layer thickness calculator 50C obtains the average thickness do of the outer rubber layer 16 based on the detection results supplied from the first to fourth electromagnetic induction distance sensors 44A to 44D (step S14). ).

Next, the hose thickness calculating unit 50D calculates the outer diameter Dm of the reinforcing layer 14 based on the average outer diameter Do of the outer surface rubber layer 16 and the average thickness do of the outer surface rubber layer 16 by the above formula (1). (Step S16).
Next, the hose thickness calculating unit 50D obtains the thickness A from the inner peripheral surface 1202 of the inner rubber layer 12 to the outer peripheral surface 1404 of the reinforcing layer 14 from the above equation (2) (step S18).

Next, the control device 50 controls each sensor moving actuator 46 to move the first to fourth electromagnetic induction type distance sensors 44A to 44D from the measurement position (P1) to the retracted position, and in this state, the measurement is performed. The end of the hose 10 is removed from the positioning mechanism for use (step S20).
Next, the end portion of the hose 10 is inserted into the annular space S between the outer peripheral surface of the nipple side tubular portion 32 and the inner peripheral surface of the socket side tubular portion 36 of the joint fitting 20, and the tip of the end portion of the hose 10 is inserted. Is applied to the buttocks 30 (step S22).
Next, positioning is performed by placing the fitting 20 between the caulking claws 40 by a caulking positioning mechanism (not shown) (step S24). The caulking claw 40 has been moved outward in the radial direction by the caulking actuator 42 in advance.

Next, the caulking control unit 50A calculates a numerical value obtained by dividing the difference between the thickness A before caulking and the thickness A after caulking by the thickness A before caulking as a caulking rate α. The caulking actuator 42 is controlled based on the thickness A before caulking so that the caulking rate α becomes a predetermined target caulking rate αr to the inside of the hose 10 of the caulking claw 40 in the radial direction. Is controlled (step S26).
That is, the caulking control unit 50A moves the caulking claw 40 radially inward by the caulking actuator 42, and deforms and caulks the socket side tubular portion 36 inward in the radial direction. Thereby, the assembly of the hose 10 and the joint fitting 20 is obtained.
When the caulking is completed, the caulking control unit 50A controls the caulking actuator 42 to move the caulking claws 40 outward in the radial direction, and the caulking claws 40 are separated from the socket-side tubular portion 36. If it does, the assembly of the hose 10 and the joint metal fitting 20 will be removed from the crimping apparatus 38 (step S28).

As described above, according to the present embodiment, the actual thickness A of the reinforcing layer 14 and the inner rubber layer 12 contributing to the sealing performance and grip force of the hose 10 with respect to the joint fitting 20 is measured, and the reinforcing layer 14 is measured. Further, the caulking rate calculated based on the actual thickness of the inner rubber layer 12 is caulked so as to be the target caulking rate.
Therefore, the joint fitting 20 can be crimped to the end portion of the hose 10 with an optimum crimping rate while omitting the step of removing the outer rubber layer 16. Therefore, while reducing the cost of the assembly of the hose 10 and the joint fitting 20, it is possible to reduce defects caused by insufficient or excessive caulking of the joint fitting 20 with respect to the end of the hose 10, This is advantageous in improving the quality of the assembly of the hose 10 and the joint fitting 20.

In the present embodiment, the distance sensor 44 measures the distance from the outer peripheral surface 1604 of the outer rubber layer 16 to the outer peripheral surface 1404 of the reinforcing layer 14 in contact with the outer peripheral surface 1604 of the outer rubber layer 16. I made it.
Therefore, the thickness do of the outer rubber layer 16 can be accurately measured without removing the outer rubber layer 16, and the reinforcing layer 14 and the inner rubber layer 12 that contribute to the sealing performance and grip force of the hose 10 with respect to the fitting 20. This is advantageous in accurately measuring the actual wall thickness A.

Further, in the present embodiment, two distance sensors 44 facing each other across the hose 10 on the diameter of the hose 10 are provided so as to be movable away from the outer peripheral surface 1604 of the outer rubber layer 16, and the outer rubber. The outer diameter Do of the layer 16 is measured by detecting the distance between the two distance sensors 44 that are in contact with the outer peripheral surface 1604 of the outer rubber layer 16.
Therefore, the outer diameter Do of the outer rubber layer 16 can be measured simultaneously with the measurement of the thickness do of the outer rubber layer 16 using the distance sensor 44 that measures the thickness do of the outer rubber layer 16. Therefore, the configuration for measuring the outer diameter Do of the outer rubber layer 16 can be simplified, and it is advantageous for shortening the measurement time of the outer diameter Do of the outer rubber layer 16.

In the present embodiment, an electromagnetic induction distance sensor 44 is used as the distance sensor 44.
Therefore, when the reinforcing layer 14 of the hose 10 includes a metal wire, it is advantageous to reliably measure the wall thickness do of the outer rubber layer 16 with a simple configuration.
In the present embodiment, the case where the reinforcing layer 14 of the hose 10 includes a metal wire has been described. However, even if the reinforcing layer 14 includes a fiber cord, The invention is of course applicable.
That is, the reinforcing layer 14 is configured by winding a fiber cord around the outer peripheral surface 1204 of the inner rubber layer 12 in a spiral shape, or is configured by braiding the fiber cord on the outer peripheral surface 1204 of the inner rubber layer 12. May be.
In this case, an ultrasonic distance sensor 44 that detects the thickness of an object with ultrasonic waves may be used as the distance sensor 44.
Further, even when the reinforcing layer 14 includes a metal wire, the ultrasonic distance sensor 44 can be used as the distance sensor 44.

DESCRIPTION OF SYMBOLS 10 Hose 12 Inner surface rubber layer 1202 Inner peripheral surface 14 Reinforcement layer 1404 Outer peripheral surface 16 Outer surface rubber layer 1604 Outer peripheral surface 20 Joint bracket 38 Clamping device 40 Clamping claw 42 Clamping actuator 44 Distance sensor 4402 Detection surface 46 Sensor moving actuator 48 linear position sensor 50 control device 50A caulking controller 50B outer rubber layer outer diameter calculator 50C outer rubber layer thickness calculator 50D hose thickness calculator

Claims (8)

An end of a hose comprising an inner rubber layer, a reinforcing layer formed outside the inner rubber layer, and an outer rubber layer formed outside the reinforcing layer is inserted into a joint fitting, and the end of the hose When the caulking claw is moved inward in the radial direction of the hose in the portion of the joint metal fitting inserted,
The outer diameter Do of the outer rubber layer and the wall thickness do of the outer rubber layer are measured, and the outer diameter Dm of the reinforcing layer is obtained from the following formula (1):
Dm = Do-2 · do (1)
When the inner diameter of the inner rubber layer is Di, the thickness A from the inner peripheral surface of the inner rubber layer to the outer peripheral surface of the reinforcing layer is obtained from the following equation (2):
A = (Dm−Di) / 2 (2)
A numerical value obtained by dividing the difference between the thickness A before caulking and the thickness A after caulking by the thickness A before caulking is calculated as a caulking rate, and the caulking rate is determined in advance. Controlling the amount of movement of the crimping claw radially inward of the hose based on the wall thickness A before crimping so as to achieve a target crimping rate;
A caulking method characterized by that. The measurement of the wall thickness do of the outer rubber layer is performed using a distance sensor that contacts the outer peripheral surface of the outer rubber layer and measures the distance from the outer peripheral surface of the outer rubber layer to the outer peripheral surface of the reinforcing layer.
The caulking method according to claim 1. Two distance sensors that face each other across the hose on the diameter of the hose are movably provided in a direction approaching and separating from the outer peripheral surface of the outer rubber layer,
The outer diameter Do of the outer rubber layer is measured by detecting the distance between the two distance sensors that are in contact with the outer peripheral surface of the outer rubber layer.
The caulking method according to claim 2. The distance sensor is an electromagnetic induction type distance sensor or an ultrasonic distance sensor.
The caulking method according to claim 2 or 3, characterized in that An end of a hose comprising an inner rubber layer, a reinforcing layer formed outside the inner rubber layer, and an outer rubber layer formed outside the reinforcing layer is inserted into a joint fitting, and the end of the hose A caulking device that moves the caulking claw in the radial direction of the hose in the portion of the joint fitting into which the is inserted, and caulks the portion of the joint fitting,
The outer diameter Do of the outer rubber layer and the wall thickness do of the outer rubber layer are measured, and the outer diameter Dm of the reinforcing layer is obtained from the following formula (1):
Dm = Do-2 · do (1)
When the inner diameter of the inner rubber layer is Di, a hose thickness measuring unit for obtaining the thickness A from the inner peripheral surface of the inner rubber layer to the outer peripheral surface of the reinforcing layer from the following equation (2);
A = (Dm−Di) / 2 (2)
A numerical value obtained by dividing the difference between the thickness A before caulking and the thickness A after caulking by the thickness A before caulking is calculated as a caulking rate, and the caulking rate is determined in advance. A caulking control unit for controlling the amount of movement of the hose to the inside of the hose in the radial direction based on the thickness A before caulking, so as to achieve a target caulking rate;
A caulking device comprising: The hose thickness measuring unit is
A distance sensor that contacts the outer peripheral surface of the outer rubber layer and measures the distance from the outer peripheral surface of the outer rubber layer to the outer peripheral surface of the reinforcing layer;
An outer rubber layer thickness calculator that calculates a thickness do of the outer rubber layer based on a detection result of the distance sensor in contact with an outer peripheral surface of the outer rubber layer,
The caulking device according to claim 5. Two distance sensors that face each other across the hose on the diameter of the hose are movably provided in a direction approaching and separating from the outer peripheral surface of the outer rubber layer,
The outer diameter Do of the outer rubber layer is measured by detecting the distance between the two distance sensors that are in contact with the outer peripheral surface of the outer rubber layer.
The caulking device according to claim 6. The distance sensor is an electromagnetic induction type distance sensor or an ultrasonic distance sensor.
The caulking device according to claim 6 or 7, characterized in that

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