JP4707360B2 - Clamping device for fittings - Google Patents

Description

The present invention relates to a fitting fitting caulking device, and more particularly to a fitting fitting caulking device used when fitting a fitting fitting fitted to an end of a hose by caulking.

For example, in an apparatus that uses pressure fluid, various types of fittings are attached to the end of the hose for transferring the pressure fluid. The fittings are attached by a caulking device. It is common.

Various types of crimping devices of this type have been proposed in the past. However, broadly speaking, an upper die and a lower die are arranged vertically so that the upper die contacts the lower die in the vertical direction. Vertical type configured to be separable (Japanese Utility Model Laid-Open No. 55-66023, Japanese Patent Laid-Open No. 5-285568, Japanese Utility Model Laid-Open No. 5)
-84430) and a horizontal type in which a pair of molds are arranged on the left and right sides so that one mold can be moved to and away from the other mold in the left-right direction (Japanese Utility Model Publication No. 1-89823). , JP-A-8
-103837 and JP-A-2004-9071).

However, in the vertical caulking device disclosed in the Japanese Utility Model Laid-Open No. 55-66023, etc., when the end portion of the hose having the fitting fitting fitted on the outer periphery is set in the caulking device, the entire hose is Must support. Therefore, when the diameter of the hose is large and its total weight is large, the worker is forced to work hard and there is a problem that the work efficiency is poor. On the other hand, in the horizontal type caulking device such as the above-mentioned Japanese Utility Model Laid-Open No. 1-89823, the entire hose is placed on the floor, and the operator holds the part of a predetermined length from the end by hand. By doing so, the end of the hose can be set in the caulking device, so that the above-mentioned problems of the vertical caulking device are eliminated.

Japanese Utility Model Publication No. 1-89823 JP-A-8-103837 Japanese Patent Laid-Open No. 2004-9071

The horizontal type caulking device disclosed in Japanese Patent Laid-Open No. 8-103837 is shown in FIGS.
As shown in FIG. 4, a rectangular frame-shaped front body 30 having a tapered hole 31 in the center, and the front body 3
A rear main body 32 disposed behind and in parallel to the rear side of 0 is integrally connected and fixed by four guide shafts 33 laid in parallel between the main bodies 30 and 32 at the respective four corners. Yes.

Further, a rectangular frame-shaped support member 34 supported by the four guide shafts 33 is provided between the front main body 30 and the rear main body 32, and the support member 34 and the rear main body 32 are provided.
The rod is extended and contracted by driving a hydraulic cylinder 35 installed between the two and the support member 34 fixed to the tip of the rod is advanced and retracted with respect to the front body 30 along the four guide shafts 33. It is configured freely.

Further, a rotating ring 36 that is rotatably mounted is mounted on the front surface of the support member 34, and a plurality of caulking pieces 37 are movable in the radial direction on the front surface of the rotating ring 36. The attached crimping jig is attached. And each caulking piece 37 is moved toward the center of the hose fitting by pushing these caulking pieces 37 into the tapered holes 31 of the front body 30,
The hose fitting is crimped on the inner peripheral surface.

As described above, in the invention of Japanese Patent Laid-Open No. 8-103837, the support member 34 is supported so as to be movable along the four guide shafts 33 laid between the main bodies 30 and 32. The cylinder rod falls downward due to the weight of the caulking piece 37 as in the inventions of Japanese Utility Model Laid-Open No. 1-89823 and Japanese Patent Application Laid-Open No. 2004-9071, which do not have such a support member. There is an effect that the problem that the central axis of the crimping jig and the central axis of the tapered hole 31 of the front main body 30 do not coincide can be solved at the initial stage after the adjustment.

That is, in order to squeeze the outer peripheral surface of the joint fitting fitted to the end of the hose with the arc-shaped inner peripheral surface of each caulking piece 37 into a circular shape, each caulking piece 37 has a tapered hole. When mating with 31,
It is necessary to receive the pressure applied to the tapered hole evenly on the inner peripheral surface thereof and to press the outer peripheral surface of the joint fitting evenly through the caulking pieces. For that purpose, it is necessary to fit the caulking jig into the taper hole with the center axis of the caulking jig and the center axis of the taper hole aligned. Is crimped into an oval shape and becomes a defective product.

However, in the invention of Japanese Patent Laid-Open No. 8-103837, each caulking piece 37 is mounted on a support member 34 via a rotating ring 36, and the support member 34 is installed between both main bodies 30 and 32. Since it is supported by the four guide shafts 33, as shown above, each caulking piece 37
As a result, the cylinder rod does not fall down due to its own weight, and the center axis and the center axis of the tapered hole 31 are not displaced.

However, since the support member 34 is supported by the four guide shafts 33, the support member 3
In order to adjust so that the center axis of each caulking piece 37 mounted on the front surface of 4 and the center axis of the tapered hole 31 of the front body 30 coincide with each other, the four supporting the support member 34 are supported. It is necessary to loosen and finely adjust the guide shaft 33 and the two main bodies 30 and 32, and then to fix them again, which takes time for adjustment and is inefficient.

In particular, during caulking, pressure is applied to the front main body 30 in the outward direction (front side), and the four guide shafts 33 connected and fixed at the four corners receive the pressure. ,
The connecting and fixing portion between the rectangular frame-shaped front main body 30 and the guide shaft 33, that is, the four corners are located at positions close to the edges of the two sides of the front main body 30, respectively. The rigidity is small. Therefore, when a pressure in the front side direction is applied to the central portion of the front main body 30, a reaction force in the rear side direction is applied to the fixing portion with the guide shaft 33 having a small rigidity, and the front main body 30 is deformed. Thus, the tapered hole 31 cannot hold a perfect circle. As a result, each caulking piece 37 cannot enter the deep part of the taper hole 31 or even presses the fitting metal fitting fitted to the hose evenly on the inner periphery of each caulking piece 37 even if it is forced. However, there is a problem in that a defective product is generated in which the joint fitting is crimped into an oval shape, and the yield is poor.

Further, due to the pressure during caulking, both the main bodies 30 and 3 are placed on the four guide shafts 33.
The force in the pulling direction acts through each of the two connecting and fixing portions, but as the caulking operation is continued, the guide shafts 33 are gradually stretched, and the stretch rate is not necessarily the same for all four shafts. The result of the experiment became clear. Therefore, if any one of the four guide shafts 33 that support the support member 34 is movably parallel to the other three guide shafts, the support member 34 cannot move, and There is a problem that the tightening operation stops.

Further, since the front main body 30 and the rear main body 32 are connected and fixed by the four guide shafts 33, the rigidity of the entire apparatus is improved but the weight is increased. Therefore, there is no problem when used as a stationary type, but there is also a problem that it is too heavy and inconvenient to use as a so-called conveyance type, for example, transported to a construction site or installed in a car. .

In order to solve the above-described conventional problems, the invention according to claim 1 of the present application includes a work plate having a circular outer shape and a tapered hole in the center, and a work plate spaced apart in parallel to the rear of the work plate. A support plate disposed in a row, three connection shafts for connecting the two plates, and a support member movably supported by two connection shafts erected at the same height of the three connection shafts. ,
A pressure plate that can be temporarily fixed to the front arm member of the supporting member by bolts and fixed by bolts; and the pressure plate that can be freely attached to and detached from the front surface of the pressure plate. The taper hole formed in the work plate includes a taper hole portion having a large diameter and a small diameter continuous from the rear side to the front side and the small diameter of the taper hole portion.水平 Consists of horizontal holes with the same diameter, and the outer diameter of the pressure plate is approximately the same as the inner diameter of the horizontal hole of the tapered hole, and the three plates for connecting the work plate and the support plate The connecting position of the connecting shaft to the work plate is the first position on the radial line extending directly below from the center of the tapered hole and the same angle as the first position, and the central angle is The two connecting shafts that are 20 ° equally spaced second and third positions and that movably support the support member are the second and third positions of the work plate. After the pressure plate, which has been temporarily fixed to the arm member by temporarily tightening a bolt, is moved in the direction of the work plate and fitted into the horizontal hole portion of the tapered hole, positioning is performed. The pressure plate is fixed to the arm member by finally tightening the temporarily tightened bolt from the front side of the taper hole, and the pressure plate is pulled out from the rear side of the taper hole to the front surface of the pressure plate. By mounting a fastening jig, the central axis of the caulking jig and the central axis of the tapered hole are made to coincide with each other.

According to the fitting fitting crimping device of the first aspect of the present invention, (1) the total number of connecting shafts can be reduced to three so that the weight of the entire device can be reduced. (2) The work plate is a plate whose outer shape is circular, and the fixed portion with the connecting shaft is on the same circumference with the central axis of the tapered hole as the center, and the center angle is a 120 ° equally spaced position. Therefore, the rigidity at the fixed portion with the connecting shaft does not deteriorate. Accordingly, the work plate is not deformed during caulking, and the perfect circle of the tapered hole is maintained. (3) Since the support member is supported by two connecting shafts installed at the same height, the cylinder rod does not fall down due to the weight of the caulking jig, and the center axis of the caulking jig In addition to being able to perform caulking work with the center axis of the taper hole aligned, the support member can move smoothly even when a phenomenon occurs in which the two connecting shafts have different elongation rates. The occurrence of a situation such as work interruption can be prevented.

According to the caulking device of the present invention, (4) the pressure plate is temporarily fixed to the arm member, moved in the work plate direction, and fitted into the horizontal portion of the tapered hole. The pressure plate is positioned. In this state, the bolts temporarily fixed from the front side of the taper hole of the work plate are finally tightened, whereby the center axis of the crimping jig to be mounted on the front surface of the pressure plate and the center of the taper hole The axis can be made to coincide with each other, and adjustment work is easy.

Hereinafter, a caulking device according to the present invention will be described in detail based on an embodiment shown in FIGS. In the figure, reference numeral 1 denotes a disc-like work plate erected on a base 1A. At the center thereof, there is a tapered hole portion 2A comprising a tapered surface having a large diameter on the rear side and a small diameter on the front side, and the tapered hole. Part 2
A work ring 2 having a horizontal hole portion 2B having an inner diameter that is the same as or slightly larger than the small diameter is provided on the front side of A. The disk-shaped work plate 1 has bolt holes 3A, 3B, 3C drilled at predetermined three locations, which will be described later, and is spaced apart in parallel to the rear of the work plate 1 and the base plate. Also on the support plate 4 erected on 4A, the bolt holes 5A, 5B,. 5B and 5C are drilled, respectively.

Bolt holes 3A, 3B, 3C drilled in the work plate 1 are formed at a first position on a radial line extending right below from the center of the tapered hole portion 2A and the horizontal hole portion 2B formed in the work ring 2, The bolt holes 3A, 3B, 3C and the support plate are formed at the second position and the third position, respectively, which are on the same circumference as the position 1 and are equally spaced with a central angle of 120 °. 4 are inserted into the bolt holes 5A, 5B, 5C drilled in 4 at both ends of the three connecting shafts 6A, 6B, 6C, which are provided between the plates 1 and 4 and are laid in parallel with each other.
Both plates 1 and 4 are integrally connected by tightening the nut.

Therefore, the bolt holes 3B and 3C drilled in the second position and the third position of the work plate 1, respectively, and the bolt holes 5B drilled in the support plate 4 facing the bolt holes 3B and 3C, 5C are at the same height position, and the bolt holes 3B, 5B and 3
Two upper connecting shafts 6B and 6C inserted into C and 5C and fixed with nuts, respectively.
Are laid in parallel with each other at the same height.

Reference numeral 7 denotes a support member supported by the two connecting shafts 6B and 6C, and the two connecting shafts 6B and 6C.
It is configured so as to be able to advance and retreat with respect to the work plate 1 guided by C, and is installed on the support plate 4 at the center of the rear surface of the rectangular holder plate 7A suspended from the center of the support member 7. The tip of the rod 8A of the hydraulic cylinder 8 is also a rectangular holder plate 7
On the front surface of A, a pair of left and right arm plates 9A and 9B are mounted so as to be spaced apart in parallel on the left and right sides and parallel to each other.

Reference numeral 10 denotes a pressure plate having a circular outer shape mounted on the front surface of the arm members 9A and 9B. The pressure plate 10 has a circular through hole 10A at the center, and the pressure plate 10 is provided on the left and right sides avoiding the through hole 10A. The bolts 11 and 11 are fastened at the position of. Further, the outer diameter of the pressure plate 10 is formed to be approximately the same as the inner diameter of the horizontal hole portion 2B of the work ring 2 attached to the center portion of the work plate 1. In the figure, 12
A, 12B is the in cutout recess formed in a portion of the upper rim of the pressure plate 10, are formed on left and right across the center axis L ₁ of the circular pressure plate 10 in a plan view.

13 is an abutting plate between the pair of left and right arm members 9A and 9B and projecting from the front surface of the holder plate 7A, and is fixed to the tip of the abutting bar 14 at its rear surface. The abutting bar 14 is on the line of the central axis L1 of the pressure plate 10 and the through hole 10A, and is formed in a horizontal hole ₁ formed at the center of the holder plate 7A and the cylinder rod 8A, respectively.
5 is inserted through a compression type pulling 16 so as to be movable, and a crank lever 17 positioned above the support member 7 is rotated so that the tip of the lock bar 17A is placed on the abutment bar 14. The abutting plate 13 is positioned by being brought into contact with the outer periphery.

A crimping jig 18 is installed on the front surface of the pressure plate 10 and is a compression type slidable radially between the back plate 19A and the front plate 19B having the same diameter and both the plates 19A and 19B. It comprises a plurality of caulking pieces 20, 20 installed via springs 20 </ b> A, and the angle of the taper surface of the taper hole 2 </ b> A formed in the work plate 1 on the outer peripheral surface of each caulking piece 20. The taper surface of the same or approximate angle as the caulking piece 20
Are formed with arc-shaped arc surfaces equal to or greater than the curvature of the fitting when the fitting fitting fitted to the end of the hose, which is a member to be crimped, is finished. .

21A and 21B are engagement pins attached to the rear surface of the back plate 19A,
Notch recesses 12A, in which the engagement pins 21A, 21B are formed in the pressure plate 10,
Each of the crimping jigs 18 is configured to be detachably assembled in close contact with the front surface of the pressure plate 10 by engaging with each of 12B. In the figure, 22 is a limit switch attached to one end of the support member 7, 23 is a micrometer attached to the connecting shaft 6B, and the tip of the micrometer 23 and the limit switch 22 face each other. Is installed.

Next, when attaching the fitting to the hose using the caulking device configured as described above,
As shown in FIGS. 8 to 10, the adjustment work conducted to first match the center axis L ₂ of the center axis L ₁ and the tapered hole portion 2A formed in the workpiece plate 1 of the circular pressure plate 10. When the center axes L ₁ and L ₂ do not coincide with each other, the caulking jig 18 mounted on the front surface of the pressure plate 10 is pushed into the tapered hole portion 2A of the work plate 1 in an inclined state. The caulking pieces 20 of the caulking jig 18 cannot be moved in the direction of the central axis L _{1 on} the inner peripheral surface of the tapered hole portion 2A. As a result, the outer peripheral surface of the joint fitting fitted to the end portion of the hose cannot be evenly pressed by the arc surface of each caulking piece 20 and becomes oval and becomes a defective product.

Therefore, in the present invention, as shown in FIGS. 6 and 8, the cylinder rod 8 </ b> A of the hydraulic cylinder 8 is extended without installing the crimping jig 18 on the front surface of the pressure plate 10, and the support member 7.
The holder plate 7A, the arm members 9A and 9B, and the pressure plate 10 which are integral with the holder plate 7 are respectively moved forward through. At this time, the pressure plate 10 is attached to the arm plate 9A.
9B is temporarily secured with bolts 11. Then, the advancing pressure plate 10 is fitted into the tapered hole of the work plate 1, and the inner diameter of the pressure plate 10 is fitted to the horizontal hole 2B through the tapered hole 2A so that the inner diameter is substantially the same as the outer diameter of the pressure plate 10. Move forward until they meet.

The pressure plate 10 by fitting the horizontal hole 2B, since a center axis L ₂ of the center axis L ₁ and the workpiece plate 1 tapered hole portion 2A and the horizontal hole 2B of the pressure plate 10 are matched, the In this state, the bolt 11 is finally tightened to fix the pressure plate 10 to the arm members 9A and 9B, and the adjustment operation is completed. And after this adjustment work is finished,
The pressure plate 10 is retracted by the cylinder rod 8A of the hydraulic cylinder 8 to return to the state shown in FIG. 8, and the engagement pins 21A, 21 attached to the pack plate 19A of the caulking jig 18 are attached.
The caulking jig 18 is assembled to the front surface of the pressure plate 10 by engaging B with notch recesses 12A and 12B formed in the pressure plate 10, respectively.

Next, hold the hose W fitted with the joint fitting R at the end and insert it from the front side of the work plate 1, the end of the work plate 1 is brought into contact with the abutting plate 13, and the fitting bracket R is connected to each caulking piece. Set in the center of the crimping jig 18 surrounded by 20. In this state, pressure oil is sent to the forward path side of the hydraulic cylinder 8 to extend the piston 8A, and the support member 7, the holder plate 7A, and the arm members 9A and 9B.
, The pressure plate 10 and the caulking jig 18 are connected to the connecting shaft 6B for supporting the support member 7.
6C, the crimping jig 18 and the fitting R are moved forward in the direction of the work plate 1 while keeping the positional relationship constant, and the limit switch 22 is moved to the micrometer 23. It advances until it abuts on the tip.

As the crimping jig 18 moves forward by a set distance, the crimping jig 18 is pushed into the tapered hole portion 2A of the work plate 1, and each crimping piece 20 of the crimping jig 18 is joined by the pushing operation. The fitting R that moves in the center direction of the fitting R and is set at the center of the crimping portion of the crimping jig 18
Are uniformly pressurized by the caulking pieces 20 and fastened to the tip of the hose W, and the caulking work is completed. Then, if the piston 8A is retracted, the crimping jig 18 is detached from the tapered hole 2A,
Each caulking piece 20 is opened outward by the urging force of the compression spring 20A, and the hose W with the joint fitting R crimped at the end can be taken out.

Since the caulking device according to the present invention has the above-described configuration, the overall weight of the device can be reduced, so that it is suitable for use as a movable mold, and the caulking jig has a tapered hole portion. Since the deformation of the work plate due to the pressure when being pushed in is small, the perfect circle of the tapered hole portion is maintained. Therefore, the pressure when the caulking jig is pushed into the tapered hole can be uniformly received by the inner peripheral surface of the tapered hole, and the caulking accuracy is improved. In addition, since the caulking jig is supported by two connecting shafts installed at the same height, the cylinder rod does not fall down due to its own weight,
The center axis of the crimping jig and the center axis of the tapered hole can be moved smoothly.

Furthermore, the pressure plate can be temporarily fixed to the arm member, moved in the direction of the work plate, and fitted into the horizontal portion of the taper hole so that positioning can be performed. An adjustment operation for making the central axis of the caulking jig attached to the front surface coincide with the central axis of the tapered hole is easy, and there are various effects that the working efficiency is further improved.

It is a front view of a caulking device in the present invention. It is a longitudinal cross-sectional view of the same apparatus. It is a top view of the apparatus. It is a right view of the same apparatus. It is a left view of the same device. It is a disassembled perspective view of the principal part of the apparatus. It is a perspective view of the principal part of the assembled state. It is a longitudinal cross-sectional view which shows the adjustment process of the apparatus. It is a right view of the adjustment process. It is an expanded sectional fragmentary view of the work plate of the apparatus. It is a partially cutaway front view of the conventional crimping apparatus. It is a right view of the same apparatus.

DESCRIPTION OF SYMBOLS 1 Work plate 2A Tapered hole part 2B Horizontal hole part 3A _, 3B, 3C Bolt hole 4 Support plate 5A _, 5B, 5C Bolt hole 6A _, 6B, 6C Connecting shaft 7 Support member 7A Holder plate 9A, 9B Arm member 10 Pressure plate 11 Bolt 12A, 12B Notch recess 18 Caulking jig 19A Back plate 19B Front plate 20 Caulking piece 21A, 21B Engagement pin

Claims (1)

A work plate having a circular outer shape and having a tapered hole in the center; a support plate disposed behind and in parallel with the work plate; three connecting shafts for connecting the plates; and A support member movably supported by two connecting shafts erected at the same height of the three connecting shafts, a temporary fixing by temporarily tightening a bolt on an arm member on the front side of the supporting member, and a bolt A pressure plate that can be fixed by final tightening, and a pressure plate that is detachable from the pressure plate that is detachable on the front surface of the pressure plate, and a tapered hole formed in the work plate includes: A taper hole portion having a large diameter and a small diameter continuous from the rear side to the front side, and a horizontal hole portion having the same diameter as the small diameter of the taper hole portion, and the outer diameter of the pressure plate is the taper Further, the connecting position of the three connecting shafts connecting the work plate and the support plate to the work plate is directly below the center of the tapered hole. A first position on the extending radial line, and a second position and a third position which are on the same circumference as the first position and are evenly spaced with a central angle of 120 °, and the support member The two connecting shafts that are movably supported are connecting shafts connected at the second position and the third position of the work plate, respectively, and the pressure plate temporarily fixed to the arm member by temporarily tightening a bolt. Is moved in the direction of the work plate, and after positioning by fitting into the horizontal hole portion of the tapered hole,
The pressure plate is fixed to the arm member by finally tightening the temporarily tightened bolt from the front side of the taper hole, and the caulking is applied to the front surface of the pressure plate pulled out from the rear side of the taper hole. A fitting fitting caulking device, wherein a jig is attached so that a central axis of the caulking jig coincides with a central axis of the tapered hole.

Images