JPH0631268Y2 - Protector fixing device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a fixing device used to previously fix the end of a protector made of sponge rubber or the like when the hose is inserted into the protector. is there.

[Prior Art] Conventionally, as shown in FIG. 6, in order to prevent the hose H from being damaged due to contact with other parts, the hose H is inserted into a tubular protector P made of sponge rubber. There is a hose protection structure in which the hose H is protected by P. In this protective structure, as the protector P,
Since the inner diameter of the hose H is smaller than the outer diameter of the hose H, it is difficult to insert the hose H into the protector P. Therefore, a method of inflating the protector P using the compressed air A has been devised.

In this method, prior to the insertion of the hose H into the protector P, the end portion of the protector P is externally fitted and fixed to the pipe 21 thicker than its inner diameter. That is, as shown in FIG.
One end (right end) of the protector P is bent with one hand, the other end is gripped with the remaining hand, and this is applied to the opening 21a of the pipe 21, and the compressed air A is introduced into the pipe 21. Supply. The protector P swells due to the air A, and a gap is formed between the protector P and the pipe 21, so that the protector P can be easily fitted onto the pipe 21.

After fitting the protector P onto the pipe 21 as described above,
As shown in FIG. 8, the end portion of the protector P that has been bent is extended, and the hose H is inserted from there. A plug (not shown) is attached to one end of the hose H so that the air A does not escape. Then, the compressed air A enters the pipe 21.
When the pressure is supplied, the protector P swells again due to the pressure, and a gap is generated between the protector P and the hose H,
Air A escapes from here. Therefore, the operator can easily insert the hose H into the protector P.

[Problems to be solved by the invention] However, conventionally, the protector P is inflated to make the pipe 21
Since the air A is prevented from coming out by bending the end portion for external fitting, there is a possibility that the bent portion may be damaged. Further, the operator has to bend one end of the protector P with one hand and hold the other end with the remaining hand to fit the pipe 21 over the pipe 21, which is a troublesome work.

The object of the present invention is not only to improve the workability by eliminating the work of bending the end of the protector when fitting and fixing the protector onto the pipe, but also to protect the end of the protector from bending. An object of the present invention is to provide a protector fixing device that can prevent the occurrence of scratches.

[Means for Solving the Problems] Therefore, in order to achieve the above-mentioned object, the present invention has a structure in which one end of a pipe to which a protector is fitted and fixed is opened, and the pipe has a diameter smaller than that of the protector. Prior to the external fitting and fixing to the pipe, a guide rod that can be engaged in the protector is provided so as to be retractable from the opening, and the compressed air supplied into the pipe is introduced into the protector in the guide rod. The gist of the present invention is a protector fixing device having a flow passage for guiding and inflating the protector.

[Operation] The guide rod is projected from the opening of the pipe, and the projected portion is covered with the protector. Then, the protector is fitted over the guide rod and covered over the opening of the pipe. At this time, the compressed air supplied into the pipe is guided into the protector through the flow passage of the guide rod. Therefore, the protector is expanded by the air, and a gap is created between the protector and the pipe. Therefore, if the protector is pressed toward the pipe in this state, the protector can be fitted onto the pipe with a slight force.

When the protector is fitted on the pipe, immerse the guide rod in the pipe.

[Embodiment] An embodiment embodying the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a pipe 2 having a hollow interior and elongated front and rear are arranged on a base 1 through columns 3. The outer diameter of the pipe 2 is larger than the inner diameter of the protector P shown in FIG. 6, and the inner diameter of the pipe 2 is larger than the outer diameter of the hose H (including the intermediate fitting M). A front end (right end in the figure) of the pipe 2 is opened, and a rear end thereof is sealed with a plug 4. An air source 5 is connected to the rear end of the pipe 2 so as to supply compressed air A into the pipe 2.

An elongated guide bar 6 is formed in the pipe 2 in the front and rear direction to form an opening 2
It is housed so that it can appear and disappear from a. The front half of the guide rod 6 is a small-diameter portion 7 formed to have substantially the same thickness as the inner diameter of the protector P. Further, the latter half of the guide rod 6 is a large diameter portion 8 formed in a size capable of sliding in the pipe 2. As shown in FIGS. A plurality of (9 in this embodiment) grooves 9 are formed at equal intervals as a flow passage for the air A extending in the direction. The front end of the large-diameter portion 8 has a slanted portion 8a whose diameter decreases toward the front side.
Are formed.

A wire 10 is connected to the rear end surface of the guide rod 6, and the wire 10 extends through the plug 4 at the rear end of the pipe 2 to the outside of the pipe 2 and is provided on the lower side of the base 1. It is attached to the press cylinder 11.

By the way, a pair of transmissive photoelectric tubes 12 are arranged above and below the front end of the pipe 2 so as to pass through a part of the outer periphery of the protector P as shown in FIG. The photocell 12 has a protector P as shown by a two-dot chain line in FIG.
When the rear end portion of the pipe 2 is covered with the front end portion of the pipe 2 and it is detected that it reaches the line connecting both photoelectric tubes 12, the rodless cylinder 11 is operated and the guide rod 6 is pulled rearward through the wire 10. It is like this.

A clamp (not shown) is arranged on the outer circumference of the front end of the pipe 2 so as to sandwich the protector P covered by the pipe 2.

Next, an operation and an effect when the protector P is externally fitted to the pipe 2 by using the protector fixing device configured as described above and the hose H is inserted into the protector P will be described.

First, as shown in FIG. 3, the rodless cylinder 11 is operated to move the front half of the guide rod 6 into the opening 2a of the pipe 2.
Then, the air source 5 is activated to supply compressed air A into the pipe 2. At this time, the slanted portion 8a of the large diameter portion 8 of the guide rod 6 is exposed from the opening 2a so that there is no large step between the pipe 2 and the guide rod 6. Then, as shown in FIG. 1, the small diameter portion 7 of the guide rod 6 is covered with the protector P from the rear end portion.
Since the small-diameter portion 7 is formed to have the same thickness as the inner diameter of the protector P, the operator can smoothly cover the small-diameter portion 7 with the protector P.

The rear end portion of the protector P slightly expands in diameter when it is placed on the slanted portion 8a of the large diameter portion 8. Then, the protector P
The rear end hits the opening 2a of the pipe 2, and the air A is
As shown in the figure, after passing through the groove 9 of the guide rod 6 to the outside of the pipe 2, it is guided between the guide rod 6 and the protector P.

However, since the inner surface of the protector P and the outer peripheral surface of the small diameter portion 7 of the guide rod 6 are in close contact with each other, the air A does not escape between them. for that reason. The air A accumulates between the rear end of the protector P and the slanted portion 8a of the guide rod 6, and inflates the rear end of the protector P. Then, a gap is created between the rear end portion of the protector P and the outer peripheral surface of the pipe 2, and the air A escapes from here. Therefore, if the protector P is pressed to the pipe 2 side (rear side) in this state, the protector P can be fitted onto the pipe 2 with a slight force.

As shown in FIG. 5, the rear edge of the protector P is the pipe 2
When the phototube 12 detects that it is externally fitted to the predetermined position, the rodless cylinder 11 operates, and the guide rod 6 retracts and comes out of the protector P.

Subsequently, the hose H is inserted into the front end portion of the protector P while supplying the compressed air A into the pipe 2 as in the conventional case. The front end or the rear end of the hose H is sealed with a plug or the like so that the air A does not escape. Then, the protector P expands due to the pressure of the air A, and a gap is created between the hose H and the protector P, and the air A escapes from here. Therefore, the operator can easily insert the hose H with a small force.

After inserting the hose H into the protector P,
When this protector P is pulled out from the pipe 2, a hose H whose outer peripheral surface is covered with the protector P is obtained as shown in FIG.

As described above, by using the fixing device of the present embodiment, unlike the conventional case, the work of bending the end portion of the protector P becomes unnecessary. Therefore, it is possible to prevent the end portion of the protector P from being scratched by bending, and the fixing work of the protector P is facilitated by the amount of the omitted bending work.

The present invention is not limited to the configuration of the above-described embodiment, and for example, a hole is provided in the guide rod 6 as a flow passage for the air A, the number of grooves 9 is appropriately changed, and so on. It may be embodied by being arbitrarily changed without departing from the above.

[Advantage of the Invention] As described in detail above, according to the present invention, when the protector pipe is externally fitted and fixed, the protector is easily fitted externally, and the work of bending the end portion is not required, thus improving workability. Not only can this be done, but the end of the protector can be prevented from being damaged by bending.

[Brief description of drawings]

1 to 5 show an embodiment embodying the present invention.
The figure is a schematic sectional view of the fixing device showing a state in which the protector is covered on the guide rod, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a state in which the guide rod is projected from the pipe. Fig. 4 is a schematic sectional view of the fixing device shown in Fig. 4, a partially enlarged sectional view showing a state in which the protector is covered with a pipe, and Fig. 5 is a fixing device showing a state in which the hose is inserted into the protector by immersing the guide rod in the pipe. A schematic cross-sectional view, FIG. 6 is a cross-sectional view showing a state in which a hose is inserted into a protector, FIGS. 7 and 8 show a conventional technique, and FIG. 7 is a cross-sectional view showing a state in which an end portion of a protector is bent, FIG. 8 is a sectional view showing a state in which the hose is inserted into the protector. 2 ... Pipe, 2a ... Opening part, 6 ... Guide rod, 9 ... Groove as flow passage, A ... Air, P ... Protector.

Claims (1)

[Scope of utility model registration request] 1. A pipe (2) to which a protector (P) is fitted and fixed is opened at one end thereof, and the pipe (2) is formed to have a smaller diameter than that of the protector (P) and the pipe (2) of the protector (P). ), A guide rod (6) which can be engaged in the protector (P) prior to external fitting and fixing is provided so as to be retractable from the opening (2a), and the guide rod (6) further includes a pipe (2). ) A protector fixing device, characterized in that a flow passage (9) is formed for guiding the compressed air (A) supplied into the protector (P) into the protector (P) so as to inflate them.