Crimping device

Abstract

Reduces the processing load when crimping. [Solution] The crimping device 1 is a crimping device that crimps an inner tube 3 and an outer tube 2 to a tubular object in which an inner tube 3 is inserted into an outer tube 2 from the outer peripheral surface side of the outer tube 2, and is equipped with multiple pressing parts 11 that contact the outer peripheral surface of the outer tube 2, and the pressing parts 11 have a main body 21 and a taper 23 formed on the main body 21 that forms a predetermined taper angle with respect to the outer peripheral surface of the outer tube 2. This allows crimping to be performed with a predetermined angle set at the contact points between the pressing parts 11 of the crimping device 1 and the outer peripheral part of the tubular object.

Description

[Technical Field]

[0001] The present disclosure relates to a crimping device. [Background technology]

[0002] Generally, two members are fastened together by crimping. Patent Document 1 discloses eight-way crimping using a crimping jig. More specifically, Patent Document 1 describes how a socket is set in a position where a predetermined area is to be formed, and how the socket is crimped from the outside by eight-way crimping using eight stands of the crimping jig. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-131917 Summary of the Invention [Problem to be solved by the invention]

[0004] In the method disclosed in Patent Document 1, the object to be crimped by the crimping device is a pipe, and no tilt angle is provided between the contact point of the pipe and the crimping jig. As a result, a large load is required when crimping with the crimping device, which may increase the cost of the power source that generates the load.

[0005] The present disclosure provides a crimping device that can reduce the processing load when performing crimping. [Means for solving the problem]

[0006] The crimping device according to the present disclosure is a crimping device that crimps an inner tube and an outer tube from the outer surface side of the outer tube against a tubular object in which an inner tube is inserted into an outer tube, and is equipped with a plurality of pressing portions that contact the outer surface of the outer tube, each of which has a main body portion and a taper formed on the main body portion that forms a predetermined taper angle with respect to the outer surface of the outer tube. This allows crimping to be performed with a predetermined angle provided at the contact point between the pressing portion of the crimping device and the outer periphery of the tubular object. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a crimping device that can reduce the processing load when performing crimping. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a block diagram showing a configuration of a crimping device according to a first embodiment. [Figure 2] 2A and 2B are a longitudinal cross-sectional view and a top view of an inner tube and an outer tube according to the first embodiment. [Figure 3] 1 is a top view showing a state in which a pressing portion according to a first embodiment crimps an object. FIG. [Figure 4] 3 is an enlarged top view of a state in which a pressing portion according to the first embodiment crimps an object. FIG. [Figure 5] 10 is a diagram showing the relationship between the taper angle of the pressing portion and the degree of pushing out of the object when a predetermined force is applied according to the first embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiment 1 Hereinafter, a crimping device according to this embodiment will be described with reference to the drawings. As shown in Fig. 1, crimping device 1 includes a plurality of pressing units 11 and a power source 12. Here, crimping device 1 crimps an object in which an inner tube 3 is inserted into an outer tube 2, from the outer peripheral surface side of the outer tube.

[0010] 2(a) and 2(b) are examples of a longitudinal cross section and a top view, respectively, of the outer tube 2 and the inner tube 3. In the following description, it is assumed that the outer tube 2 and the inner tube 3 are both arranged to extend in the Z direction, which is the height direction. In the following description, the horizontal direction is defined as the X direction and the Y direction, and the X, Y, and Z directions are perpendicular to each other in a Cartesian coordinate system.

[0011] The outer tube 2 is a hollow cylindrical member. The diameter of the outer tube 2 is slightly larger than the diameter of the inner tube 3. Here, the outer tube 2 is disposed below the inner tube 3. Here, the outer diameter of the outer tube 2 is approximately 50 mm, but this can be changed as appropriate.

[0012] The inner tube 3 is a fitting member that is inserted into the outer tube 2. Fig. 2(c) is a vertical cross-sectional view showing an example of the state in which the inner tube 3 is inserted into the outer tube 2. The inner tube 3 may be a hollow member, or may be a solid cylindrical member.

[0013] 3 is a top view of an object in which an outer tube 2 and an inner tube 3 are fitted together, and an XY cross section of the pressing portions 11 when the object is crimped from the outside of the outer tube 2 by a plurality of pressing portions 11. For ease of explanation, the X direction will be referred to as the left and right direction in FIG. 3, and the Y direction will be referred to as the front side and the bottom side in FIG. 3 as the rear side.

[0014] Typically, the pressing portions 11 are made of metal. As shown in Fig. 3, the pressing portions 11 are configured by four pressing portions 11a, 11b, 11c, and 11d.

[0015] Specifically, first pressing portion 11a and second pressing portion 11b are aligned in the left-right direction, and similarly, third pressing portion 11c and fourth pressing portion 11d are aligned in the left-right direction. Furthermore, first pressing portion 11a and third pressing portion 11c are aligned in the front-rear direction, and similarly, second pressing portion 11b and fourth pressing portion 11d are aligned in the front-rear direction.

[0016] That is, the first pressing portion 11a and the fourth pressing portion 11d are arranged diagonally, and the second pressing portion 11b and the third pressing portion 11c are arranged diagonally. The pressing portions 11 operate in response to power supplied from a power source 12.

[0017] Here, each pressing portion 11 has a main body portion 21, a tip portion 22, and a taper 23. Here, the tip portion 22 is the tip of the main body portion 21 and is the portion that comes into contact with the outer peripheral surface of the outer tube 2, which is the object. The taper 23 has a shape in which a part of the rectangular main body portion 21 is cut out in a top view. In other words, as viewed from the Z direction, the taper 23 is formed so that it forms a predetermined taper angle with respect to the outer peripheral surface of the outer tube 2, with the tip portion 22 as its apex. The pressing portion 11 will be described in more detail below.

[0018] The main body 21 of each pressing portion 11 is formed to be longer in the left-right direction than in the front-rear direction. As shown in Fig. 3, as an example, the main body 21 of each pressing portion 11 has a quadrilateral shape in which a portion is cut out from a rectangular shape in top view to form a taper 23. Note that the length of each pressing portion 11 at its longest point in the X direction is approximately 50 mm, the length in the Y direction is approximately 15 mm, and the length in the Z direction is approximately 10 mm, but is not limited to these.

[0019] Tip 22 provided on main body 21 is provided so as to protrude in the X direction at a corner close to the central axis of the object. Specifically, in first pressing portion 11a, taper 23a is formed by cutting out the right front corner of main body 21a, so that tip 22a, which is the apex of taper 23a, protrudes to the right at the right rear of main body 21a.

[0020] Similarly, in the second pressing portion 11b, a taper 23b is formed by cutting out the left front corner of the main body portion 21b, so that the tip portion 22b protrudes leftward at the left rear of the main body portion 21b. In the third pressing portion 11c, a taper 23c is formed by cutting out the right rear corner of the main body portion 21c, so that the tip portion 22c protrudes rightward at the right front of the main body portion 21c. In the fourth pressing portion 11d, a taper 23d is formed by cutting out the left rear corner of the main body portion 21d, so that the tip portion 22d protrudes leftward at the left front of the main body portion 21d.

[0021] 3, the first pressing portion 11a and the third pressing portion 11c move to the right, and the second pressing portion 11b and the fourth pressing portion 11d move to the left.

[0022] In other words, the first pressing portion 11a and the second pressing portion 11b form a pair and operate to approach each other in the X direction. The third pressing portion 11c and the fourth pressing portion 11d form a pair and operate to approach each other in the X direction. The four pressing portions 11 operate simultaneously.

[0023] In this way, the four pressing portions 11 press the outer tube 2 together with the inner tube 3 inward while in contact with the outer tube 2, thereby performing crimping.

[0024] Here, the crimp formed by the first pressing portion 11a pressing the object is referred to as crimp portion 31a, the crimp formed by the second pressing portion 11b pressing the object is referred to as crimp portion 31b, the crimp formed by the third pressing portion 11c pressing the object is referred to as crimp portion 31c, and the crimp formed by the fourth pressing portion 11d pressing the object is referred to as crimp portion 31d.

[0025] 3, the distance between the first crimped portion 31a and the second crimped portion 31b is short, and similarly the distance between the third crimped portion 31c and the fourth crimped portion 31d is short. On the other hand, the distance between the first crimped portion 31a and the third crimped portion 31c is long, and similarly the distance between the second crimped portion 31b and the fourth crimped portion 31d is long.

[0026] As an example, the angle between the first swage 31a and the second swage 31b and the center point of the object in the XY direction is 60°, the angle between the second swage 31b and the third swage 31c is 120°, the angle between the third swage 31c and the fourth swage 31d is 60°, and the angle between the fourth swage 31d and the first swage 31a is 120°.

[0027] 4 is an enlarged view of the case where crimping is performed by the first pressing portion 11a. Here, the taper angle of the first pressing portion 11a is assumed to be θ. At this time, as the first pressing portion 11a moves to the right, a force F is applied, particularly in the direction perpendicular to the taper 23a that is in contact with the object. If this force F is divided into forces in the X and Y directions, the force in the right direction is F·sinθ, and the force applied in the forward direction is F·cosθ.

[0028] Here, even when the same force is supplied from power source 12, if angle θ of taper 23a of first pressing portion 11a is small, the force with which tip portion 22a presses the object to the right increases. On the other hand, if angle θ of taper 23a is small, the force with which tip portion 22a presses the object to the right decreases.

[0029] FIG. 5 is a diagram showing the relationship between the angle θ of the taper 23a provided on the first pressing portion 11a and the force applied in the front-rear direction F·sin θ.

[0030] 5, when the angle θ of the taper 23 of the first pressing portion 11a is close to 90° (π / 2), that is, when the tip 22a is flat, the force applied in the front-rear direction is large. In this state, the force applied to the object by the tip 22a of the first pressing portion 11a in the right direction is small.

[0031] In this case, since the first pressing portion 11a must be pressed strongly to the right to achieve crimping, it is necessary to increase the force applied to the first pressing portion 11a in the power source 12, thereby increasing the processing load. In this case, a power source 12 capable of exerting a high processing load is expensive, which increases costs.

[0032] Conversely, if the angle θ of the taper 23a of the first pressing portion 11a is close to 0°, that is, if the first pressing portion 11a is needle-shaped or the like, a high processing load can be exerted, and therefore the force pressing in the right direction can be increased even with a small amount of power supplied from the power source 12. However, the durability of the first pressing portion 11a is reduced, and the cost of replacing the first pressing portion 11a, etc., increases.

[0033] Therefore, in the crimping device 1, by forming a taper 23a at a predetermined taper angle θ in the first pressing portion 11a, it is possible to reduce the processing load while maintaining a predetermined durability in the first pressing portion 11a.

[0034] Furthermore, with the crimping device 1, when power is applied from the power source 12, the crimping depth can be changed by adjusting the angle θ of the taper 23a. In other words, with the crimping device 1, the precision of the crimping can be controlled by changing the strength of the power from the power source 12 and by changing the shape of the first pressing portion 11a. This allows the crimping device 1 to perform precise crimping of the object.

[0035] Although the first pressing portion 11a has been described, the same applies to the second pressing portion 11b, the third pressing portion 11c, and the fourth pressing portion 11d.

[0036] To sum up the above, by providing a taper in the pressing portion 11 in the crimping device 1, crimping can be performed in a state in which the processing load applied to the pressing portion 11 is reduced.

[0037] Therefore, the caulking device 1 can reduce costs because it does not need to use an expensive power source 12 that can produce high output. Furthermore, the caulking device 1 can reduce the processing load applied to the pressing portion 11, thereby reducing metal wear of the pressing portion 11 and leading to cost reduction.

[0038] Furthermore, in the crimping device 1, the pressing accuracy of the pressing portion 11 used for crimping can be adjusted in accordance with the taper angle θ, so that crimping can be performed with higher accuracy.

[0039] Generally, a fitting shape is created and positioning is performed to prevent misalignment, but even in this case, machining or hardening of the contact area may be required. The crimping device 1 can provide an inexpensive and simple fastening structure instead of such positioning.

[0040] For example, by using the crimping device 1, crimping can be performed without using a separate fixing member when fixing the body frame used in a vehicle. At this time, with the inner pipe 3 inserted into the outer pipe 2, the crimping device 1 can position the inner pipe 3 in the axial direction and apply axial force to prevent it from coming loose. Furthermore, because the crimping and fixing using the crimping device 1 is done by fixing using concave and convex surfaces, the maintenance work required for removal can be reduced.

[0041] The present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit of the present invention. In other words, the above description has been omitted or simplified as appropriate for the sake of clarity, and a person skilled in the art can easily modify, add, or convert each element of the embodiment within the scope of the present invention.

[0042] For example, although the outer pipe 2 and the inner pipe 3 have been described as being circular in top view, the crimping device 1 can also be applied to polygonal piping or wiring.

[0043] Furthermore, the crimping device 1 makes it difficult for water to enter the crimp 31, which is the fastening portion between the outer pipe 2 and the inner pipe 3. Therefore, the crimping device 1 can perform crimping without being concerned about the rust resistance of the outer pipe 2 and the inner pipe 3. [Explanation of symbols]

[0044] 1. Crimping device 2 outer tube 3 Inner tube 11 Pressing section 11a first pressing portion 11b second pressing portion 11c third pressing portion 11d Fourth pressing part 12 Power source 21 Main body 22 Tip 23 Taper 31a Crimping part 31b Crimping part 31c Caulking part 31d Crimping part

Claims

1. A crimping device for crimping an inner tube and an outer tube from an outer peripheral surface side of a tubular object in which an inner tube is inserted into an outer tube, a plurality of pressing portions that come into contact with the outer peripheral surface of the outer tube; The pressing portion is a main body; a taper formed on the main body portion and forming a predetermined taper angle with respect to the outer circumferential surface of the outer tube; Crimping device.

2. The pressing portion is In the main body, a tip portion which is an apex of the taper is disposed at a position closest to a central axis of the object. The crimping device according to claim 1 .

3. the plurality of pressing portions are four pressing portions, The first pressing portion and the second pressing portion perform an operation of approaching each other, The third pressing portion and the fourth pressing portion perform an operation of approaching each other, the operating direction of the first pressing portion and the pressing direction of the third pressing portion are the same direction, the operating direction of the second pressing portion and the pressing direction of the second pressing portion are the same direction, the first pressing portion, the second pressing portion, the third pressing portion, and the fourth pressing portion operate simultaneously; The crimping device according to claim 2 .

4. The pressing portion is Compared with the distance between the first crimp formed on the object by the first pressing portion and the second crimp formed on the object by the second pressing portion, and the distance between the third crimp formed on the object by the third pressing portion and the fourth crimp formed on the object by the fourth pressing portion, The first and third crimping portions are arranged at positions where a distance between the first crimping portion and the third crimping portion and a distance between the second crimping portion and the fourth crimping portion are shorter. The crimping device according to claim 3.

5. Further, a power source is provided to supply power for operating the pressing portion, The accuracy of the crimping is adjusted according to the strength of the power supplied from the power source and the taper angle set by the taper. The crimping device according to claim 4.

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