JP3854272B2 - Portable hose caulking machine and caulking dies - Google Patents

Description

The present invention is, for example, relates to hoses and other pressure hose for fire in portable hose crimping machine and crimping die roll for caulking the hose fitting (hose nipple).

When fixing the hose to the hose metal fitting with the caulking ring, for example, the cylindrical portion of the caulking ring set in an externally fitted state with respect to the hose is advanced by moving a plurality of caulking dies radially arranged in the center direction. There has been proposed a caulking device in which a processed portion at the tip of the caulking is pressed against the cylindrical portion and the caulking ring is caulked and fixed to a hose (see, for example, Patent Document 1).
JP-A-11-207540

  By the way, in a fire hose, since high-pressure fire extinguishing water is used, water may leak from a connection part with a hose fitting. It has been confirmed that many of the causes of such water leakage are caused by the vertical rod 52 generated in the longitudinal direction of the caulking ring 51 as shown in FIG. 12, for example, when the caulking ring is caulked and deformed. Yes. That is, a gap 54 in the same direction is formed between the vertical rod 52 and the hose 53, and water leaks from the gap 54. Such a vertical rod 52 is generated along the gap between the dies so that when the caulking ring 51 is compressed from the periphery by a plurality of caulking dies, the surplus material escapes between the dies. In FIG. 12, reference numeral 55 denotes a hose fitting.

  If such a water leak occurs, it must be replaced with a new caulking ring as soon as possible. However, since this type of conventional caulking device is heavy, it is usually deferred at a specific location such as a factory, so that it often takes a long time to replace it. Therefore, it is desirable that each fire station can easily replace the caulking ring with a new one so that it can cope with an emergency. About this point, it is the same also in the pressure | voltage resistant hose used in order to supply high pressure air from a compressor to a civil engineering machine, for example.

  In addition, when replacing with a new caulking ring, it is necessary to break the caulking ring which fixes the leaking hose. In this case, for example, a hook or a gold saw is used. The caulking ring is cut with a cutting tool such as the above, but in such a case, it is not easy to cut only the caulking ring, and the hose fitting may be damaged. Therefore, a countermeasure for easily breaking the caulking ring has been demanded.

The present invention has been made in view of such circumstances, to generate the vertical wrinkles cause leaks in caulking ring can caulked without carry easily portable hose crimping machine and caulking dice The purpose is to provide.

In the present invention, means for solving the above-described problems are configured as follows.
(1) A portable hose caulking machine according to the present invention includes a plurality of supports connected in an openable and closable manner, and each of the supports is arranged radially so that the plurality of supports are closed. Respectively attached hydraulic cylinders, hydraulic lines communicating with all the hydraulic cylinders and connectable to an external oil supply means, and detachably attached to pistons of the hydraulic cylinders, A caulking die that is driven to move forward and backward in the radial direction with respect to the shaft center, and
The caulking die has a plurality of pressing ribs that protrude in a concave arc shape in a direction perpendicular to the axial direction of the caulking ring and are juxtaposed in the axial direction of the caulking ring; When the caulking ring is caulked and fixed to all of the caulking dies by the caulking dies, a curvature smaller than that of the pressing rib is absorbed in order to absorb the surplus generated in the caulking ring. And a surplus absorption recess that is recessed in a circular arc shape on both sides of the pressing rib.

  According to such a configuration, for example, when two hydraulic cylinders (a total of four) are provided on a pair of support bodies that are connected to be freely opened and closed, the set pressure of each hydraulic cylinder is set to about 70 MPa, By selecting the size of the four caulking dies attached to the cylinder, three types of caulking rings with different diameters (for example, outer diameter 49, 62.5, 76.5 mmφ) are connected to the corresponding hose fittings (nominal diameter). 45, 50, 65 mmφ, thickness 2 to 2.5 mm). Its structure is simple and can be provided at low cost, and can be easily carried because it is lightweight. Note that the discharge pressure of the electric hydraulic pump or the manual hydraulic pump may be set to a constant pressure and connected to the hydraulic line. Moreover, the deformation | transformation of a hose metal fitting can be prevented by inserting the deformation | transformation prevention bar in the hose metal fitting. The set pressure of the hydraulic cylinder is not limited to 70 MPa, and may be set as appropriate.

  When the caulking ring is pressed from the periphery by each caulking die, surplus material is generated on both sides of the press rib and surplus material tends to move in both directions (outward direction) of the die. The meat is absorbed inward by the surplus absorption recesses provided on both sides of the pressing rib. Therefore, the vertical hook along the axial direction of the caulking ring as in the conventional case does not occur. Thereby, the leakage of the fluid from a hose can be eliminated.

(2) In such a portable hose caulking machine, when the caulking ring is caulked, a positioning member for setting the hose metal fitting at a predetermined position is provided on any one of the support bodies. It is preferable to attach it so that it can move in the axial direction. If comprised in this way, the bamboo nipple-shaped nipple part formed in the hose metal fitting can be set in an appropriate correspondence position with respect to the press rib of the caulking die, and the caulking ring is attached to the hose metal fitting. It can be squeezed into a tight state.

(3) The caulking dies according to the present invention are respectively attached to a plurality of hydraulic cylinders arranged radially of the hose caulking machine in order to caulk and fix the caulking ring externally fitted to the hose to the hose fitting. It is a caulking die that can be detachably attached,
Occurs when caulking the caulking ring with a plurality of press ribs protruding in a concave arc shape in a direction perpendicular to the axial direction of the caulking ring and juxtaposed in the axial direction of the caulking ring In order to absorb surplus material, the surplus material has a curvature smaller than that of the pressing rib, and is provided with a surplus absorbing recess that is recessed in a concave arc shape on both sides of the pressing rib.

According to such a configuration, when the caulking ring is pressed by each caulking die, surplus material is generated on both sides of the press rib and the surplus material will move in both sides (outside direction) of the die. However, the surplus is absorbed by the surplus absorption recesses provided on both sides of the pressing rib. Therefore, the vertical warp as in the prior art does not occur. Thereby, the leakage of the fluid from a hose can be eliminated .

  The portable hose caulking machine according to the present invention is configured, for example, by setting a set pressure of a hydraulic cylinder provided on a support body connected to be freely opened and closed and selecting a caulking die attached to each hydraulic cylinder. A plurality of caulking rings having different diameters can be caulked. Since the configuration is simple, it can be provided at low cost. Moreover, since it is lightweight, it can be carried easily.

  When the caulking ring is pressed from the periphery by each caulking die, the surplus that occurs on both sides of the press rib and the surplus that tends to move in both directions (outward direction) of the die are the press ribs. Since it is absorbed inward by the surplus absorption recesses provided on both sides of the rim, no vertical folds along the axial direction of the caulking ring are generated. Thereby, the leakage of the fluid from a hose can be eliminated.

  In the caulking die according to the present invention, when the caulking ring is pressed by each caulking die, the surplus material generated on both sides of the press rib and the both sides of the die (outward direction) tend to move. The surplus is absorbed inward by the surplus absorption recesses provided on both sides of the pressing rib, so that the conventional vertical flaw does not occur. Thereby, the leakage of the fluid from a hose can be eliminated.

  Hereinafter, a portable hose caulking machine, a caulking die, and a ring breaker according to the preferred embodiment of the present invention will be described in detail with reference to the drawings.

  1 to 3 show a configuration of a portable hose caulking machine 1. The portable hose caulking machine 1 includes a pair of upper and lower supports 3 and 4 that are connected to each other by a hinge mechanism 2 so as to be opened and closed. Each of the supports 3 and 4 includes two hydraulic cylinders 5 (51 to 54). Are attached, and the four hydraulic cylinders 51 to 54 are radially arranged in a state where the supports 3 and 4 are closed. A caulking die 6 is detachably attached to a piston 5a of each hydraulic cylinder 5 that is driven to move forward and backward in the radial direction with respect to the axis of the caulking object, and a hydraulic pipe that communicates with each hydraulic cylinder 5. The passage 7 (71 to 79) is connected to an oil supply means (not shown, electric type or manual type) for supplying hydraulic oil having a predetermined pressure (constant).

  When the caulking ring 9 is externally fitted to the hose 8 fitted on the bamboo nipple-shaped nipple portion 10a of the hose fitting 10 (see FIGS. 4 and 5) and the caulking die 6 is caulked. Further, surplus thickness absorbing recesses 6b and 6c (see FIGS. 6 and 7) for absorbing the surplus thickness generated in the caulking ring 9 are recessed on both sides of the pressing rib 6a. In order to prevent deformation of the hose fitting 10 when the caulking ring 9 is caulked, the hose fitting 10 is caulked with the deformation prevention bar 11 (see FIG. 8) inserted.

  With such a configuration, when the caulking ring 9 is pressed from the periphery by the four caulking dies 6, extra thickness is generated on both sides of the pressing rib 6 a and both sides of the caulking dice 6 (outward direction). ) 6h, 6h (see FIGS. 6 (d), 6 (e), 7 (d), 7 (e)), the surplus is moved inside (respectively by the surplus absorption recesses 6b, 6c) Absorbed in the direction toward the center of the recesses 6b and 6c). Accordingly, the conventional vertical rod 52 (see FIGS. 12A and 12B) does not occur, and is pressed by the pressing surface of the pressing rib 6a as shown in FIGS. 11A and 11B. A middle convex bulge 9b is formed between the ring-shaped strips 9a, 9a, and no gap is generated between the caulking ring 9 and the hose 8. Thereby, the leak from the connection part of the hose 8 can be eliminated.

  As described above, when two hydraulic cylinders 5 and 5 (four in total) are provided on the upper and lower supports 3 and 4, respectively, the set pressure of each hydraulic cylinder 5 is set to about 70 MPa, and the hydraulic cylinders 5 are attached to each hydraulic cylinder 5. By selecting the size of the four caulking dies 6 to be formed, three types of caulking rings having different diameters (for example, outer diameters 49, 62.5, 76.5 mmφ) are connected to corresponding hose fittings (nominal diameter 45, 50, 65 mmφ, thickness 2 to 2.5 mm). In this case, although not shown in the drawing, the connection port 7a of the hydraulic pipe line 7 is connected with a (commercially available) electric hydraulic pump or manual hydraulic pump, and the discharge pressure thereof is, for example, about 70 MPa as described above. The constant pressure may be set.

  Such a portable hose caulking machine 1 has a simple configuration and can be provided at low cost. In addition, since it is lightweight, it can be easily carried with the pump by gripping the handle 12 attached to the upper portion of the upper support 3 even when an electric hydraulic pump or a manual hydraulic pump is connected. When the pump is separated and transported, the hydraulic hose can be easily connected to the connection port 7a at the site of use. The connection port 7a is provided with a check valve 18, and is closed by a dust plug 18 when not in use.

  In such a configuration, the present invention does not specify the number of supports connected to each other as two, and may be three or more. A number may be selected. Further, the plurality of supports may be connected to each other by, for example, a fitting mechanism other than the hinge mechanism, regardless of the configuration or type.

  The whole will be described in detail. A stand plate 13 is attached to the lower part of the lower support 4 and a hydraulic hose attached to an electric hydraulic pump or a manual hydraulic pump is connected to the front surface of the stand plate 13. The connection port 7a is provided. A hydraulic line 71 formed in the support 4 so as to communicate with the connection port 7 a communicates with the hydraulic lines 72 and 73 of the left and right hydraulic cylinders 54 and 51. One hydraulic line 73 communicates with a hydraulic line 74 via a hydraulic chamber in the hydraulic cylinder 51, and the hydraulic line 74 supports the upper and lower supports 3 and 4 so as to be openable and closable. 2 communicates with a hydraulic line 75 formed in the shaft 14 with the head, and this hydraulic line 75 also communicates with a hydraulic line 76 formed in the upper support 3.

  That is, as shown in FIG. 2, the hydraulic line 75 formed on the shaft 14 includes two lines 75 a and 75 b that extend in a direction orthogonal to the axial direction of the shaft 14 and communicate with each other. With the supports 3 and 4 closed, one conduit 75 a communicates with the hydraulic conduit 74 and the other hydraulic conduit 75 b communicates with the hydraulic conduit 76. The hydraulic line 76 communicates with a hydraulic line 79 communicating with the hydraulic chamber of the hydraulic cylinder 53 from the hydraulic line 77 via the hydraulic line 78 via the hydraulic chamber of the hydraulic cylinder 52. Hydraulic oil can be supplied to the four hydraulic cylinders 51 to 54 by the hydraulic pipes 71 to 79 communicating in this way.

  A ring groove is formed on the outer periphery of the shaft 14 that constitutes the hinge mechanism 2 that supports the upper and lower supports 3 and 4 and has a function of communicating both the hydraulic pipes 74 and 76. Ring (O-ring and B-ring) r is fitted, a seal is provided between the bearing surfaces of both supports 3 and 4, and a retaining ring c for retaining is fitted on the rear end side of the shaft 14. It is. On the other hand, a stopper rod 31 with a head (see FIG. 3) is inserted into the locking shaft hole 15 formed on the open / close end side of both supports 3 and 4 to lock both supports 3 and 4 in a closed state. It can be fixed. In addition, a retaining steel ball 33 urged by a spring 32 is attached to the rear portion of the plug bar 31.

  On the hose insertion side (front side) of the lower support 4, a size adjustment shaft 16 projects in the direction coaxial with the shaft 14. A size adjustment plate 17 with an adjustment screw 17 a is provided on the size adjustment shaft 16. Are inserted so as to be movable and position-fixed, and the hose fitting 10 can be set at a predetermined caulking work position according to the size of the caulking ring 9 to be caulked. In this case, the upper and lower supports 3 and 4 are closed and each piston 5a is in the standby position, and as shown in FIG. The deformation prevention bar 11 (see FIG. 8) is inserted inside, and the size adjusting plate 17 is fixed to the positioning plate 11c of the deformation prevention bar 11 in contact with the hose fitting 10 at a predetermined position. I can do it.

  When the four hydraulic cylinders 51 to 54 are actuated on the set hose fitting 10 to extend the pistons 5a, the press ribs 6a of the caulking dies 6 are as shown in FIGS. By being closed in an arc shape, the caulking ring 9 is caulked through the hose 8 to the nipple portion 10a of the hose fitting 10. At that time, as described above, the surplus thickness generated on both sides of the pressing rib 6a and the surplus thickness to be moved to the outside of the pressing rib 6a are set inside (respective recesses 6b, 6c, In the direction toward the center of 6c). Accordingly, there is no escape of excess meat into the gap between the dies. 4 shows a caulking die 6 for a nominal diameter 65, and FIG. 5 shows a caulking die 6 for a nominal diameter 50 (not shown for a nominal diameter 45).

  As shown in FIGS. 6 and 7, the caulking die 6 is provided with three pressing ribs 6a having a pressing action surface formed in a concave arc shape on the inside thereof, and both sides of the pressing rib 6a. In addition, in order to absorb the surplus, it is configured such that surplus-absorption recesses 6b and 6c having a smaller curvature than the pressing rib 6a are formed, and at the center position on the outside (back side), A shaft hole 6e for fixing is drilled, and a screw hole 6d drilled from the outside for screwing a hexagon socket head bolt 22 (see FIG. 1) for fixing the die faces the shaft hole 6e. A positioning pin 21 is fitted into a pin hole 6f drilled from the back near the shaft hole 6e.

  With such a configuration, the positioning pin 21 of the caulking die 6 is inserted into the pin hole 5b formed in the piston 5a, and the fixed shaft 5c protruding from the piston 5a is inserted into the shaft hole 6e. When the tip of the hexagon socket head bolt 22 (see FIG. 1) screwed into the screw hole 6d is pressed against the side surface of the fixed shaft 5c and tightened, the caulking die 6 is fixed to the piston 5a in a positioned state. Can do. 6 shows a caulking die 6 for a nominal diameter 65, and FIG. 7 shows a caulking die 6 for a nominal diameter 50 (not shown for a nominal diameter 45).

  In the caulking dies 6 configured as described above, the positions of the pressing ribs 6a and 6a between the caulking dies 6 and 6 adjacent to each other are set so as to be shifted by the thickness of the pressing rib 6a. preferable. With such a setting, the caulking ring 9 can be caulked more appropriately with respect to the nipple portion 10a of the hose fitting 10 in the shape of bamboo. In this case, the position of the pressing rib 6a of the caulking die 6 may be different, and the fixed shaft 5c of the piston 5a and the pin hole 5b may be different. Further, the caulking die of the present invention is not limited to the portable hose caulking machine 1 but may be used for other manual caulking machines or stationary caulking machines as long as it has a plurality of radially arranged hydraulic cylinders. Can be used.

  When the caulking ring 9 is caulked with such a caulking die 6, the deformation preventing bar 11 for holding the hose fitting 10 from the inside is shown in FIG. As shown in the drawing, a positioning plate 11c is movably fitted on a screw shaft 11b fixed to a center bar 11a inserted into the hose fitting 10, and a hexagonal nut is inserted on the outside thereof via a plain washer 11d. 11e is screwed, and a handle 11f is fixed to the end of the screw shaft 11b.

  With such a configuration, when the caulking ring 9 is caulked from the outside, it is possible to prevent the hose metal fitting 10 from being deformed by holding the hose metal fitting 10 from the inside, and the caulking ring 9 can be It can be squeezed into a tight state. When the crimping is completed and the deformation prevention bar 11 cannot be removed from the hose fitting 10, the handle 11f is fixed by hand, and the hex nut 11e is rotated with a tool in the direction of pulling out the screw shaft 11b. The center bar 11a can be easily pulled out from the main body of the hose fitting 10. For the hose fitting 10 having a different nominal diameter, a deformation prevention bar 11 (not shown) having a center bar 11a having an outer diameter matched to the nominal diameter may be prepared.

  FIGS. 9 and 10 show the configuration of the ring breaker 31 for breaking the caulking ring 9 that is caulked and fixed to the hose fitting 10. 9 shows the nominal diameter 65, and FIG. 10 shows the nominal diameter 50 (the nominal diameter 45 is not shown). As shown in the figure, this ring breaker 31 is detachably attached to the piston 5 a of the hydraulic cylinder 5 in place of the caulking die 6, and the axial center of the caulking ring 9 set in the portable hose caulking machine 1. A cutting blade 31b disposed in the center of the breaker body 31a so as to correspond to the direction, cutting depth regulating portions (flat bottom portions of the breaker body 31a) 31e, 31e formed on both sides of the cutting blade 31b, and caulking In order to hold the ring 9 in a pressed state, a pair of ring holding members 31c attached to the breaker body 31a is provided on both sides of the cutting blade 31b at a predetermined interval. In addition, 31d is a bolt for fixing the ring holding member 31c to the breaker body 31a.

  According to such a configuration, for example, if the ring breakers 31 and 31 are attached to a pair of opposing hydraulic cylinders 5a and 5a, respectively, and both the ring breakers 31 and 31 are pressed against the caulking ring 9, then 2 The caulking ring 9 can be divided into two along the axial direction by the two cutting blades 31b and 31b. At that time, since the caulking ring 9 is held in a pressed state by the ring holding members 31c and 31c disposed on both sides of the cutting blade 31b, the cutting line can be cut cleanly without deviation.

  Further, by providing flat cutting depth regulating portions 31e and 31e on both sides of the cutting blade 31b, the protruding amount of the cutting blade 31b is larger than the thickness of the caulking ring 9 and the caulking ring 9 If the thickness is set to be smaller than the sum of the thicknesses of the hose 8, only the caulking ring 9 can be cut without scratching the hose fitting 10. At that time, there is a possibility that a part of the hose 8 may be cut, but the hose 8 may be cut and removed so that the part does not remain. The ring breaker of the present invention can be used not only for the portable hose caulking machine 1 but also for other manual caulking machines and stationary caulking machines provided that they have a plurality of radially arranged hydraulic cylinders. can do.

It is a front view of the portable hose crimping machine which concerns on embodiment of this invention. It is the same right view. It is the left side view. (A) is a front view of a state in which the same caulking die (for nominal diameter 65) is closed, and (b) is a side view of a state in which a caulking ring is externally fitted to a hose fitting (before caulking). (A) is a front view of a state in which the same caulking dies (for nominal diameter 50) are closed, and (b) is a side view of a state in which a caulking ring is externally fitted to a hose fitting (before caulking). It is composition explanatory drawing of the die for caulking (for nominal diameter 65), (a) is a top view, (b) is a front view, (c) is a II sectional view taken on line II of (a), (d) (B) is a BB, CC arrow longitudinal cross-sectional view of (b), (e) is an AA, DD arrow vertical cross-sectional view of (b). It is composition explanatory drawing of the die for caulking (for nominal diameter 50), (a) is a top view, (b) is a front view, (c) is a II sectional view taken on line II of (a), (d) (B) is a BB, CC arrow longitudinal cross-sectional view of (b), (e) is an AA, DD arrow vertical cross-sectional view of (b). It is explanatory drawing of the deformation | transformation prevention bar. (A) is a front view of the ring breaker (for nominal diameter 65), and (b) is a side view. (A) is a front view of the ring breaker (for nominal diameter 50), and (b) is a side view. (A) is sectional drawing of the hose connection part of the state by which the ring for crimping was crimped, (b) is a perspective view of the ring for crimping. (A) is sectional drawing of the hose connection part in the state in which the conventional caulking ring was caulked, (b) is a perspective view of the caulking ring.

Explanation of symbols

  3, 4 ... support, 5 ... hydraulic cylinder, 5a ... piston, 6 ... caulking die, 6a ... press rib, 6b ... surplus absorption recess, 7 ... hydraulic line, 8 ... hose, 9 ... caulking ring DESCRIPTION OF SYMBOLS 10 ... Hose metal fittings, 17 ... Positioning member, 31 ... Ring breaker, 31a ... Breaker main body, 31b ... Cutting blade, 31c ... Ring holding member

Claims (3)

A plurality of supports connected to be freely opened and closed;
In a state where the plurality of supports are closed, a hydraulic cylinder disposed on each of the supports so as to be arranged radially,
A hydraulic conduit that communicates with all of the hydraulic cylinders and can be connected to an external oil supply means and a piston of the hydraulic cylinders are detachably attached to each other and move forward and backward in the radial direction with respect to the axis of the caulking object A caulking die that is driven freely,
The caulking die is
A plurality of pressing ribs protruding in a concave arc shape in a direction perpendicular to the axial direction of the caulking ring and juxtaposed in the axial direction of the caulking ring;
When the caulking ring externally fitted to the hose is caulked and fixed to the hose metal fitting by all the caulking dies, in order to absorb the surplus thickness generated in the caulking ring from the press rib, A portable hose caulking machine comprising a surplus absorption recess having a small curvature and recessed in a concave arc shape on both sides of the pressing rib.   A positioning member for setting the hose fitting at a predetermined position when caulking the caulking ring is attached to any one of the supports so as to be movable and position-fixable in the axial direction of the caulking ring. The portable hose caulking machine according to claim 1, wherein: A caulking die that is detachably attached to a plurality of hydraulic cylinders arranged radially of a hose caulking machine in order to caulk and fix the caulking ring externally fitted to the hose,
A plurality of pressing ribs protruding in a concave arc shape in a direction perpendicular to the axial direction of the caulking ring and juxtaposed in the axial direction of the caulking ring ;
In order to absorb the surplus generated when the caulking ring is caulked, the surplus thickness absorbing recess is provided in a concave arc shape on both sides of the press rib with a smaller curvature than the press rib. A caulking die characterized by comprising