JPH0628484U - Civil engineering hose - Google Patents

Abstract

(57) [Summary] [Purpose] A rock crusher, air breaker, or air compressor connection means, and a rock crusher himself to prevent compressed air from being blown out on the spot, or accidentally connect to a rock crusher, etc. (EN) Provided is a civil engineering hose provided with a means for automatically stopping the ejection of compressed air even when the hose is released. [Structure] An outlet side connecting portion 2 for connecting to a rock crusher A, an air breaker or the like is provided at one end portion of a hose body 1 having a desired length, and an inlet side connecting portion for connecting an air compressor B at the other end portion thereof. 3 are provided respectively, and the outlet-side connecting portion 2 is a rock crusher A.
And an air breaker are connected to open the air supply line 14a, and the rock crusher A and the air breaker are disconnected to close the air supply line 14a. The hose body 1 includes a hose protector 62 provided around one end of the hose body 1, and the inlet-side connecting portion 3 includes a fitting portion with the hose body 1.
A hose protector 63 is provided around the other end.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a civil engineering hose for connecting an air tool for civil engineering, a device (a rock crusher, an air breaker, etc.) and an air tool for civil engineering, and an air compressor for supplying compressed air to the device.

[0002]

[Prior art]

 A rock crusher, an air breaker, etc. and an air compressor (air compressor) that supplies compressed air to the rock crusher, an air breaker, etc., is a hose with relatively excellent durability for civil engineering (hereinafter referred to as a civil engineering hose). Connected by. This civil engineering hose is sold in units of 30, 50 meters, etc., and at both ends a hose purchaser himself / herself has a predetermined connecting tool (connecting part) for connecting to a rock crusher, an air breaker, or an air compressor. It is designed to be fitted and fixed for use.

[0003]

[Problems to be solved by the device]

 However, in addition to the connectors (connecting parts) that connect both ends to the civil engineering hose, the hose protector is also used to prevent the hose itself from being rubbed by the tip of the nipple of the connecting device (connecting part) and causing air leakage. It is also necessary to attach a hose, and if these tasks are covered, the work of attaching various equipment after purchasing a hose is very complicated, and there is a problem that amateurs cannot satisfactorily attach these equipment. In addition, when the civil engineering hose loosens at the connection with the rock crusher due to vibration caused by high-pressure flowing air and comes off the rock crusher, etc., it will be swung around by the jet pressure of compressed air and the worker will be injured. Since there is no switch for stopping the air compressor in the rock crusher or air breaker, there is no need to go to the air compressor installed on a truck or the like when stopping or interrupting the rock crushing work. There is also a problem that the main switch of the air compressor needs to be carried out OF every time to carry it, and the working conditions for sharp cutting become worse.

The present invention has been made in view of the above-mentioned conventional circumstances, and its problem is to provide a means for connecting to a rock crusher, an air breaker, an air compressor, and a rock crusher himself / herself for compressing air on site. It is an object of the present invention to provide a civil engineering hose provided with means for preventing jetting and automatically stopping jetting of compressed air even if the connection with a rock crusher or the like is accidentally disconnected.

[0005]

[Means for Solving the Problems]

 The technical measures taken to achieve the above-mentioned purpose are as follows: one side end of the hose body having a desired length has an outlet side connection part for connecting to a rock crusher or an air breaker, and the other side end has an air compressor. Each of the above-mentioned outlet side connection parts is connected to a rock crusher or an air breaker to open an air supply line, and disconnected from the rock crusher or an air breaker to supply air. An air supply control valve that closes the line, and a hose protector provided around one end of the hose body including a fitting portion with the hose body are provided, and the inlet side connection portion includes a fitting portion with the hose body. The gist is that a hose protector is provided around the other end of the hose body.

[0006]

[Action]

 According to the above technical means, by connecting the outlet side connection part provided at the end of the hose body to the rock crusher or air breaker, and the inlet side connection part to the air compressor, respectively, Connect the air breaker and the air compressor. When the connection with a rock crusher or an air breaker is released, the internal air supply line is automatically closed by the air supply control valve to prevent compressed air from spouting from the hose body.

[0007]

[Effect of device]

 As described above, the present invention is provided with an outlet side connecting portion for connecting to a rock crusher, an air breaker, etc. in advance at one end of the hose body, and an inlet side connecting portion for connecting to an air compressor at the other end. Since a hose protector is provided at the connection part, it can be used for target equipment and devices (rock crusher, air breaker and air compressor) without installing necessary equipment after purchasing a hose as in the prior art. It is possible to provide a convenient civil engineering hose that can be connected with durability deterioration protected. Moreover, it is necessary to go to a truck, etc., which is placed in a place away from a rock crusher, an air breaker, etc., and to wait until the operation of the compression device is stopped by contacting a crew member (a worker on the truck or a resident worker). In a crushed place, it is possible to prevent the compressed air from spouting from the end of the hose as well as stopping the work. Therefore, when the work is interrupted, when the working hours are over, when the rock crusher or air breaker is removed from the hose body for transportation, etc., the operation switch or the main switch of the air compressor far from the rock crusher or the air breaker is used. It is possible to contribute to the mitigation of working conditions for sharper cuts without the need to stop the switch, and to improve rock-breaking efficiency and labor. Moreover, even if an accident occurs such that the hose body is temporarily separated from the rock crusher, air breaker, etc. due to vibration during work, etc., the hose body is still blown out by the compressed air ejected from the end of the hose body. There is no risk of a dangerous phenomenon such as being swung around, it is possible to ensure the safety of the operator and prevent damage to the outlet side connection part, the inlet side connection part, and the hose protector at both ends.

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 3, 4 and 5, and 6 to 8 each show an embodiment of a civil engineering hose. Reference numeral 1 is a hose body, 2 is an outlet side connecting portion, 3 is an inlet side connecting portion, 4 Is an air supply control valve.

Referring to FIG. 1 to FIG. 3, the hose body 1 is for the rock crusher A, has a predetermined length (eg 10, 20, 30, 40, 50 meters, etc.), and has one end. An outlet side connecting portion 2 for connecting the rock breaking machine A and an inlet side connecting portion 3 for connecting the air compressor B are provided at the other end.

The outlet-side connecting portion and the inlet-side connecting portions 2 and 3 are rotary sockets 22 fitted to the inner peripheral surface of one end of wing nuts 12 and 13 having female screw portions 12a and 13a screwed on the inner peripheral surfaces thereof. , 23 are rotatably connected to the inner peripheral surfaces of the nipples 42, 43 via steel balls 32, 33, and one end and the other end of the hose body 1 are utilized to utilize their elasticity. The one end portion and the other end portion of the hose body 1 which is fitted onto the nipple portions 42 and 43 while being fitted onto the nipple portions 42 and 43 are fixed to the nipple portions 42 and 43 by crimping nuts 52 and 53, and the crimping is performed. The hose body 1 including the nuts 52 and 53 is protected by hose protectors 62 and 63 that are provided around one end and the other end of the hose body 1.

The caulking nuts 52 and 53 firmly fix one end and the other end of the hose body 1 externally fitted to the ends of the nipple parts 42 and 43 as described above to the nipple parts 42 and 43. One end of the hose body 1 that has a function and is loosely fitted to the one end portion and the other end portion of the hose body 1 to which the circular pipe is to be fixed and is fastened with a dedicated tool (not shown). , The other end is caulked to the nipples 42 and 43, respectively.

The hose protectors 62, 63 are integrally formed of a desired synthetic resin material, and are made of a main cylinder portion 62a, 63a, and a coiled portion 62b that is connected to the main cylinder portions 62a, 63a and is expandable. 63b and short tubular portions 62c and 63c connected to the coiled portions 62b and 63b are integrally provided, and the nut bodies 5 are provided at the circumferential ends of the main tubular portions 62a and 63a at appropriate intervals in the circumferential direction. A screw shaft portion 7a of a screw 7 is inserted into the nut body 5 by inserting the half-divided L-shaped metal fitting 6 and inserting one half of the half-divided L-shaped metal fitting 6 into the nut body 5 and caulking the tip thereof. By locking the outer surfaces of 52 and 53, the wide range of one end and the other end of the hose body 1 including the caulking nuts 52 and 53 is protected.

The air supply control valve 4 includes an opening / closing valve cylinder 14 in which the inner peripheral surfaces of the nipple portions 42 and 43 are slidably fitted and the inside of which is an air supply line 14a, and the tips of the nipple portions 42 and 43. A valve portion 24 integrated with the tip of the opening / closing valve cylinder 14 so as to project, and a tapered outer surface formed at the base end portion of the opening / closing valve portion 14 located inside the wing nuts 12 and 13. A flange portion 34 which is an inclined surface 34a and an inclined surface a'or b'which is screwed to the female screw portions 12a 1 and 13a of the wing nuts 12 and 13 and engages with the tapered inclined surface 34a in the distal end, respectively. It is composed of a connecting screw pipe a of the rock crusher A and a connecting screw pipe b of the air compressor B provided on the peripheral surface.

As shown in FIG. 1, the valve portion 24 is provided with projecting pieces 24 a ... At appropriate intervals at the tip of the opening / closing valve cylinder 14 so as to project outward from the tips of the nipple portions 42, 43. At the same time, an elastic valve member is fixed to the tip of the nipples 42 and 43, and the back surface portions of the nipples 42 and 43 opposite to the valve seat surfaces 42a and 43a that are inclined are formed on the valve seat surfaces 42a and 43a. The connecting screw pipe a of the rock crusher A, the connecting screw pipe b of the air compressor B, and the inclined surfaces a'and b'at the tips of the connecting screw pipe b of the air compressor B are located on the base end side of the valve cylinder 14 for opening and closing. The tapered inclined surface 34a is pushed by surface engagement to separate it from the valve seat surfaces 42a, 43a to maintain the air supply line 14a in an open state, and conversely, the connecting screw pipe a of the rock crusher A is wing nut. If it deviates from 12, the part that was pushing the tapered inclined surface 34a disappears, so it is forced by the compressed air pressure. Is pushed to the nipple portion 42 side is adapted to closing the air supply line 14a seated on the valve seat surface 42a (FIG. 3).

The reason why the air supply control valve 4 is also provided in the inlet side connecting portion 3 is that, even if either the inlet side connecting portion 3 or the outlet side connecting portion 2 is connected to the rock crusher A or the air compressor B, This is because the supply of air to the rock crusher A and the disconnection of the connection with the rock crusher A can stop the ejection of compressed air.

Next, the operation of the civil engineering hose of this embodiment will be described. FIG. 1 shows the civil engineering hose 1 of this embodiment in which a rock crusher A and an air compressor B are connected to each other. One end and the other end of the hose body 1 are fitted onto the nipples 42 and 43, respectively. A wing nut in which the connecting screw pipe a of the rock crusher A and the connecting screw pipe b of the air compressor B are screwed to one end and the other end of the hose body 1 by firmly fixing the female nuts 52 and 53. 12 and 13 are provided, and the hose protectors 62 and 63 protect the end portions of the wide range of the hose body 1 including the caulking nuts 52 and 53. Purchase the civil engineering hose 1 of the required length, and screw the wing nut 12 with the connection screw a of the rock crusher A, and the wing nut 13 with the connection screw b of the air compressor B. The taper-shaped inclined surface 34a pushes the valve portion 24 away from the valve seat surfaces 42a and 43a at the tips of the nipple portions 42 and 43, and the inside of the hose body 1, the air supply line 14a, and the rock crusher A are installed. And the compressed air is sent to the rock crusher A by pressure (Fig. 1). On the other hand, when the connecting screw a of the rock crusher A comes off the wing nut 12 (sometimes artificially and sometimes due to an accident), the part that pushed the tapered inclined surface 34a is Since it disappears, the valve portion 24 is forcibly pushed toward the nipple portion 42 side by the compressed air pressure, sits on the valve seat surface 42a, closes the air supply line 14a, and stops the supply of compressed air (Fig. 3). .

4 and 5 show a modified example of attachment of the hose protector 62. In this example, two pairs of locking holes 8 and 8 are formed in the hose protector 62 with the nipple portion 42 sandwiched therebetween, and the free end of the fixing pin 9 formed in a split pin shape is connected to the pair of locking holes 8. , 8 to insert and lock into the other pair of locking holes 8 and 8 by utilizing its elasticity, and the fixing pin 9 has nipples 42 from both sides between the free end and the base end. A nipping portion 9'which elastically holds is formed by bending.

A feature of this embodiment is that the hose protector 62 can be stably attached without any loosening due to vibration, and the attaching operation can be performed by a simple operation by inserting a pin. The holding force of the nipple holding portion 9'can easily rotate the hose protector 62 with respect to the nipple portion 42 by applying an artificial force, and on the other hand, the pulling direction with respect to the nipple portion 42 is easy. The nipple 42 is engaged with a force that does not pull it out, and like a split pin, if a tool such as a screwdriver is inserted into the base end, it is forcibly pulled out. Further, in this embodiment, the hose protector 62 is provided with a protrusion preventing step portion 10 projecting from a portion of the caulking nut 52 which is close to the end portion on the tip end side of the nipping portion 42. This is because the fixing pin 9 and the slip-out prevention step 10 indirectly clamp the caulking nut 52 with a small gap to prevent the hose protector 62 from shifting or slipping out in the front-rear direction (rock crusher direction, hose body direction). It has the role of surely preventing it. Of course, this modification is equally useful for the hose protector for the inlet side connection, and is not limited to the embodiment shown in FIGS. 1 to 3 but also the outlet side connection of the embodiment shown in FIGS. 6 to 8 described later. The same can be applied to the hose protector 72 for the part 2 and the hose protector (not shown) for the inlet side connection part (not shown).

FIGS. 6 to 8 show a hose joint for a rock crushing machine, which is provided with an outlet side connecting portion 3 having an air supply control valve 4 and an inlet side connecting portion (not shown) at both ends. Since the outlet-side connecting portion 3 and the inlet-side connecting portion (not shown) have the same structure, the air supply control valve 4 in the outlet-side connecting portion 3 will be described, and the attachment structure of the hose protector 72 is as shown in the above-mentioned drawing. 4 and FIG. 5 are the same as those in the embodiment shown in FIG.

The air supply control valve 4 is provided horizontally with a cylindrical socket portion 54 slidably inserted into the inner peripheral surface of the nipple portion 11 and an air supply line 14 a in the nipple portion 42. A valve shaft portion 64 connected to the cylindrical socket portion 54 through a communication portion 54c with the air supply line 14a, and a valve body provided at the tip of the valve shaft portion 64 protruding from the tip of the nipple portion 42. 74 and an inclined seating surface 42b formed on the tip surface of the nipple portion 42.

The tubular socket portion 54 expands along the base end surface of the nipple portion 42 from a short cylinder portion 54a that is slidably fitted into the base end portion of the nipple portion 42, and the outer surface thereof is tapered. And the flange portion 54b is integrally formed.

The flange portion 54b has an enlarged surface 54b- which is larger in diameter than the inner peripheral surface diameter of the nipple portion 42 through a hopper type inclined surface 54b-1 which is opened from the inner peripheral surface of the short tubular portion 54a. 2 is formed continuously as an inner peripheral surface, and a small groove 54b-3 is formed in the middle of the expanded surface 54b-2.

The valve shaft portion 64 abuts against the inner peripheral surface of the nipple portion 42 at an intermediate portion of the small diameter shaft portion 64a which remains as an air supply line 14a between the inner peripheral surface of the nipple portion 42 and a cross-shaped side view. The guide arrow-shaped portion 64b is integrally projected, and a leg seat 64c whose side surface abuts the hopper-type inclined surface 54b-1 and the expanding surface 54b-2 from the base end portion of the shaft portion 64a. Are formed so as to extend radially, and the E-ring 18 is locked in the small groove 54b-3 in a state where the leg seats 64c are fitted in the flange portion 54b. The leg seats 64c are brought into contact with the outer end surface thereof, so that the leg seats 64c are sandwiched between the inclined surface 54b-1 and the E-ring 18 so that the leg sockets 64c can be hooked to and detached from the cylindrical socket portion 54. There is.

A communication portion 54c with the air supply line 14a is necessarily formed between the leg seats 64c ... As shown in FIG.

The valve element 74 is detachably attached via an E-ring 18 to the tip of a shaft portion 64 a protruding into the hose body 1 from the tip end surface of the nipple portion 42.

Further, the tubular socket portion 54 is provided with a retaining convex portion (retaining ring) 19 around the outer peripheral surface of the short tubular portion 54 a, and the inner peripheral surface of the nipple portion 42 is recessed in the circumferential direction. The retaining projection (retaining ring) 19 is loosely fitted in the recess 20, and the movable amount is controlled so that the recess 20 can reciprocate in the horizontal direction by the width dimension of the recess 20.

The recess 20 is provided with a width dimension slightly longer than the stroke of the valve body 74 when the valve is opened as shown in FIG. 6 and when the valve is closed as shown in FIG.

Next, the operation of the hose joint for a rock crushing machine of this embodiment will be briefly described. The connecting screw tube a of the rock crushing machine A is screwed into the female screw portion 12a of the wing nut 12 and the tip of the connecting screw tube a. While the inclined surface a ′ of the inner peripheral surface and the tapered inclined surface 54b ′ of the outer peripheral surface of the flange portion 54b are engaged with each other, the flange portion 54b is connected to the connecting screw tube a and the base end surface of the nipple portion 42 ( In detail, it is sandwiched with the rotary socket 22) in an airtight manner. As a result, the valve body 74 at the tip of the valve shaft portion 64 connected to the cylindrical socket portion 54 is separated from the seating surface 42b at the tip end surface of the nipple portion 42 toward the inside of the hose body 1 to open the valve. Open the air supply line 14a leading to (Fig. 6). On the other hand, when the connection screw a of the rock crusher A and the wing nut 12 are artificially or naturally unraveled, the connection screw a of the rock crusher A holding the flange portion 54b disappears, so that the valve body The seat 74 sits on the seating surface 42b and closes the valve to automatically close the air supply line 14 (FIG. 8).

The feature of this embodiment is that, by removing the E-rings 18 and 18, it can be changed to a general hose joint for a rock breaking machine without the valve shaft portion 64 and the valve body 74, and it is temporarily changed due to aging. Even if the valve body 74 slips off or the valve body 74 is torn, there is no concern that the valve shaft portion 64 and the cylindrical socket portion 54 will fall off due to the action of the retaining projection 19, so at least the rock crusher A The flange 54b of the cylindrical socket 54 can be sandwiched between the connecting screw tube a and the base end of the nipple 42, and a hose joint for a rock crusher that is always airtight can be constructed.

Although not shown, the hose protectors 62, 63, 72 are formed of the main cylindrical portion and a flexible deformable portion made of a soft resin material integrally connected to the main cylindrical portion, or the main cylindrical portion. The thin portion may be formed integrally with the main tubular portion and the easily deformable portion that is circumferentially provided at appropriate intervals.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view of a civil engineering hose of the present embodiment, omitting intermediate portions thereof.

FIG. 2 is a sectional view taken along line (2)-(2) of FIG.

FIG. 3 is a partially cutaway front sectional view of an outlet-side connecting portion showing a state in which a rock crusher is detached and an air supply line is closed.

FIG. 4 is a partially cutaway front sectional view showing a modified example of the attachment structure of the hose protector.

5 is a sectional view taken along line (5)-(5) of FIG.

FIG. 6 is a front sectional view of a civil engineering hose of another embodiment, showing an outlet side connection portion.

FIG. 7 is a side cross-sectional view showing a fitting relationship between a valve shaft portion and a flange portion.

FIG. 8 is a front cross-sectional view showing a state in which a connecting screw pipe of the rock breaking machine is removed.

[Explanation of symbols]

1: Hose body 2: Outlet side connection part 3: Inlet side connection part A: Rock crusher 14a: Air supply line B: Air compressor 4: Air supply control valves 62, 63, 72: Hose protector

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location E21C 3/24 9013-2D

Claims (1)

[Scope of utility model registration request] 1. An outlet-side connecting portion for connecting to a rock breaking machine, an air breaker, etc. at one end of a hose body having a desired length, and an inlet-side connecting portion for connecting to an air compressor at the other end. The outlet side connection portion is provided with an air supply control valve and a hose that open the air supply line by connecting with a rock crusher or an air breaker and close the air supply line by disconnecting the rock crusher or an air breaker. A hose protector provided around one end of the hose body including a fitting part with the body, wherein the inlet-side connection part is provided around the other end of the hose body including a fitting part with the hose body. A hose for civil engineering, which is equipped with a protector.