JPH0451999Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a punching tool for punching small holes in the peripheral wall of a synthetic resin pipe.

(Prior art) For example, as a water supply device for plants grown in a greenhouse, small holes are formed in the circumferential wall of a synthetic resin tube at appropriate intervals in the longitudinal direction or in multiple rows, and the rear end of the water supply tube is inserted into the small holes. There is a known structure in which water is supplied to the plants by inserting a water supply tube into the tube and discharging water from the tip of the inserted water supply tube.

(Problems to be Solved by the Invention) Conventionally, the small hole is drilled at a position that has been manually positioned in advance, using a drilling machine such as an electric drill, and the small hole that has been drilled is The water supply tube is inserted into the

As described above, the fact that a drilling machine such as an electric drill is required to drill a small hole causes problems in that the work is relatively large-scale and that a power source is required during the work.

Moreover, since the small hole drilled using a drilling machine such as the electric drill mentioned above is cut by the drill cutting edge, the inner circumference of the small hole elastically returns after drilling, that is, a springback phenomenon occurs. is unlikely to occur. Therefore, in order to fix the water supply tube into such a small hole by simply inserting it, the inner diameter of the small hole must be carefully set, and even if it is set and formed carefully, it will not be easy to insert it. This causes problems such as complicated work.

This invention was made in order to solve the problems of the conventional technology, and it is possible to drill a small hole easily and reliably by manual operation, and also allows the water supply tube to be inserted easily and reliably. An object of the present invention is to provide a punching tool for synthetic resin pipes that can be fixed firmly.

(Means for Solving the Problems) In the punching tool for synthetic resin pipes according to this invention, a pair of lever members intersect in an X-shape, and this intersecting part is pivoted by a stop shaft to integrally connect each other. A punching tool for synthetic resin pipes, which has a processing part at one end of a lever member and a grip part at the other end, the processing part of one lever member being open toward the other lever member for positioning a synthetic resin pipe. A receiving tray is attached, and an interference arm with an opposing space is extended to face the receiving surface of the positioning tray, and a hole is formed in the processed portion of the other lever member to extend toward the synthetic resin pipe positioning tray. A punch is attached so as to be axially movable, and a stop mechanism for regulating the amount by which the processing section is closed is provided on the grip section.

(Function) In this invention, with the pair of lever members opened, the synthetic resin pipe is positioned and held by the synthetic resin pipe positioning tray, and the grip part is rotated in the closing direction, thereby punching the hole punch. The tip of the tube can penetrate the peripheral wall of the synthetic resin tube to form a small hole in which a springback phenomenon occurs, and a water supply tube can be inserted and fixed into this small hole.

Moreover, since the interference arm with an opposing space is extended opposite the receiving surface of the positioning tray, the synthetic resin pipe that is in contact with the receiving surface of the positioning tray is prevented from returning to the hole by the punch. Although it follows and moves in the same direction, immediately after this movement it comes into contact with the interference arm and is prevented from moving.

(Example) Fig. 1 is a perspective view showing an embodiment of the punching tool for synthetic resin pipes according to this invention. In the figure, reference numerals 1 and 2 are a pair of lever members that intersect in an X shape, and the intersecting part is Both are integrally connected by being pivotally connected by a stop shaft 3. and lever members 1 and 2
One end side of each, that is, above the stop shaft 3, is the processed part A, and the other end side, that is, below the stop shaft 3, is the grip part B.
The processed part A and the grip part B are always biased in the opening direction by a spring 4 bridged to the grip part B.

Reference numeral 5 indicates a synthetic resin pipe positioning tray, which is fixed to the tip of the processed portion A of one lever member 1 by, for example, welding.

The synthetic resin pipe positioning tray 5 is made of a thin steel plate having a substantially semicircular cross section, and is fixed with its axis oriented in the thickness direction of the lever member 1, and opened toward the other lever member 2. There is.

An interference arm 5A is formed facing the receiving surface of the synthetic resin tube positioning tray 5. This interference arm 5A is formed, for example, by plastic working a steel wire, and therefore includes a facing space 5a.

6 indicates a punch for punching, and the other lever member 2
It is attached to the tip of the processing part A so that it can be moved axially. That is, the punch 6 is made of a solid steel bar whose tip facing the synthetic resin pipe positioning tray 5 is formed into a substantially truncated cone shape, and is fixed to the tip of the lever member 2 by, for example, welding. The cylindrical holder 7 is inserted into the cylindrical holder 7 so as to be axially movable, and is fixedly held by a set screw 8 for positioning.

9 indicates a stop mechanism. This stop mechanism 9
is for setting the closing amount of the processing part A, that is, the closing position of the punch 6 for drilling.For example, the contact member 9A provided on one lever member 1 and the welding nut 9B on the other lever member 2 It is configured by a screw member 9C which is screwed into the hole punch 6 with its tip facing the abutment member 9A, and by moving the screw member 9C and adjusting its protrusion amount L1, The closing position is set. In the figure, 10 indicates a fixing double nut, and P indicates a synthetic resin pipe.

In the above structure, when drilling a small hole (described later) at a desired position of the synthetic resin pipe P, as shown in FIG.
This synthetic resin pipe P is brought into contact with the receiving surface of the positioning tray 5 with the hole facing the punch 6 side.

Next, the grip portion B is relatively gently closed against the spring force of the spring 4, and a check is made to see if the tip of the punch 6 matches the drilling position P through the opposing space 5a of the interference arm 5A. Check.

If the tip of the punch 6 does not match the drilling position P, the synthetic resin pipe P is moved in the axial direction and around the axis to make it match.

Subsequently, the grip portion B is strongly closed to a position where the tip of the screw member 9C in the stop mechanism 9 shown in FIG. 1 abuts the abutment member 9A. By this,
As shown in FIG. 3, the tip of the punch 6 penetrates the peripheral wall of the synthetic resin pipe P to form a small hole 11.

In this way, a plurality of small holes 11 are each drilled at predetermined positions, and immediately after the small holes 11 are drilled, a water supply tube 12 is inserted into each small hole 11, as shown in FIG. Said small hole 11
is formed by being punched through by the punch 6, so elastic return, a so-called springback phenomenon, occurs in the periphery of each small hole 11. The water supply tube 12 closes to the small hole 11 due to the springback phenomenon.
It will be fixed in a liquid-tight manner. Therefore, since no gap is created between the inner circumferential surface of the small hole 11 and the outer circumferential surface of the water supply tube 12, water leakage from the fixed portion, that is, wasteful water discharge can be prevented.

Once the small hole 11 is drilled, the lever members 1 and 2 are closed by releasing the closing force of the grip part B.
is returned to the open state shown in FIG. 1 by the spring force of the spring 4. In this case, the positioning tray 5
Synthetic resin pipe P in contact with the receiving surface of (see Figure 3)
follows the return movement of the punch 6 and moves in the same direction, but immediately after this movement it comes into contact with the interference arm 5A and is prevented from moving.

Therefore, from then on, only the punch 6 moves, and the punch 6 comes out of the small hole 11.

The inner diameter of the small hole 11 is the protrusion amount L of the punch 6.
2 and the protrusion amount L1 of the screw member 9C in the stop mechanism 9, the water supply tube 12 can be securely fixed, and even if the water supply tube 12 has a different outer diameter, 12, it is possible to cope with variations in the outer diameter by making the above-mentioned adjustments.

Of course, it goes without saying that the protrusion amount L1 of the screw member 9C in the stop mechanism 9 and the protrusion amount L2 of the punch 6 should be adjusted and set as appropriate depending on the outer diameter of the synthetic resin pipe P or the thickness of the peripheral wall. .

(Effects of the invention) As explained above, according to this invention, a synthetic resin pipe positioning tray that is open toward the other lever member is attached to the processed part of one lever member, and Since the processing section is equipped with a punch for drilling that extends toward the synthetic resin tube positioning tray, after the synthetic resin tube is received by the synthetic resin tube positioning tray and aligned, the grip section is removed. A small hole can be easily and reliably drilled by performing a simple closing operation, and the water supply tube can be inserted into the small hole by the spring back of the drilled small hole. can be securely fixed.

In addition, by extending the interference arm with a space facing the receiving surface of the positioning tray, the synthetic resin pipe that is in contact with the receiving surface of the positioning tray follows the return movement of the punch. However, immediately after this movement, it comes into contact with the interference arm and is prevented from moving, and after that, only the drilling punch moves and the drilling punch is pulled out from the small hole. The drilling work can be carried out smoothly.

Furthermore, since the drilling punch is mounted so as to be axially movable, and the grip part is provided with a stop mechanism for setting the closing amount of the processing part, by adjusting at least one of them as appropriate, it is possible to cut the synthetic resin pipe. Even if the outer diameter or wall thickness is different,
Alternatively, even if the water supply tube has various outside diameters, the small hole can be properly and reliably bored in the synthetic resin tube.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the punching tool for synthetic resin pipes according to this invention, Fig. 2 is a partial front view of the aligned state, and the third part is an explanatory front view of the small hole punching state. FIG. 4 is a perspective view showing an example of a connected state of the water supply tube. 1, 2...Lever member, 3...Stop shaft, 4...Spring, 5...Synthetic resin pipe positioning tray, 5
A...Interference arm, 6...Drilling punch, 9...
Stop mechanism, 11...Small hole, A...Processing section, B
...Grip part, P...Synthetic resin pipe.

Claims (1)

[Claims for Utility Model Registration] (1) A pair of lever members intersect in the shape of an
A synthetic resin pipe punching tool having a processing part at one end of each of the lever members and a grip part at the other end, the synthetic resin pipe having a processing part of one lever member open toward the other lever member. A positioning tray is attached, and an interference arm with an opposing space is extended to face the receiving surface of the positioning tray, and an interference arm is provided at the processed portion of the other lever member toward the synthetic resin pipe positioning tray. A punching tool for synthetic resin pipes, characterized in that an extending punch for punching is attached so as to be axially movable, and a stop mechanism for regulating the amount of closing of the processing section is provided in the grip section. (2) The synthetic resin pipe punching tool according to claim 1, wherein the pair of lever members is provided with a spring that is always biased in the opening direction.