JP3034600U - Long object cutting machine - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] A long die in which two dies in a hollow portion of a frame are stacked and accommodated, and both front and rear surfaces thereof are held by a holding member for preventing protrusion, and one die is driven to be inserted into the die. Make it easy to change the position of the die of the cutting machine that cuts objects and exchange with another die. SOLUTION: A pressing member 18, which is formed by stacking a fixed die 29 and a movable die 31 on the end face of a frame 1 which is housed in a hollow portion 2, has a keyhole-shaped locking hole 21 and a small diameter portion 21 thereof.
The frame portion 1 is detachably fixed to the frame 1 by a fixing means including a shaft portion 23b through which the b is inserted and an engaging portion piece 23 having a head portion 23a through which the large diameter portion 21a can be inserted.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a handheld and portable cutting machine for cutting long objects such as metal shapes, bars and pipes.

[0002]

[Prior art]

 For example, when building an indoor electrical wiring circuit, raceways or ducts that comply with the technical standards for electrical equipment are used to attach electric wires and lighting equipment.

These raceways or ducts are metal profiles having a U-shaped cross section and are usually cut into a predetermined length at the construction site.

As a hand-held portable cutting machine for that purpose, two dies having groove-shaped insertion holes of the same shape as the shape member are arranged in an overlapping manner, and the shape member is inserted into these insertion holes to cut the cutting point. A cutting machine configured to match the overlapping surface, fix one die and drive the other die by fluid pressure, electric power, or human power to cut through the insertion holes by crossing them is widely used. The cutting edge of the profile is not deformed or crushed by shearing force like the one using a cutting blade, and even if the movable die is not driven at high speed, burrs do not occur on the cutting surface. Even if the edge of the insertion hole on the working stacking surface side wears out, you can replace the die position and use the surface on the opposite side, so it is economical. By preparing multiple sets of provided one It has the advantage of being able to cut long objects such as shape materials of different sizes and shapes with a table cutting machine.

The inventor and the applicant of the present invention also proposed a cutting machine having the above-mentioned configuration using two dies each having a groove-shaped insertion hole, as described in Registered Utility Model No. 3011026. ing.

[0006]

[Problems to be solved by the device]

 In the cutting machine described in the above publication, two rectangular plate-shaped dies are superposed and fitted in a hollow portion opened to the front and rear of the frame, and a frame-shaped pressing member for preventing these protruding to the front and rear is provided. It consists of several through bolts that are placed on both the front and rear sides of the frame and are inserted through them, and then clamped and fixed in a state of overlapping each other. Have

Therefore, when changing the position of the die or when changing to a different die, the through bolt is pulled out to remove the holding member and the hollow portion is completely opened, and the die is replaced in position or replaced with another die. It is necessary to stack the pressing member again and insert and tighten the through bolts.Besides aligning the bolt insertion holes, it is necessary to attach and detach nuts for all through bolts, which is very troublesome. is there.

Further, in the movable die, the driving piston and the return spring are made to act on the opposite outer peripheral surfaces, so that when the die is removed, these protrude into the hollow portion from above and below to fit the die. Often difficult.

It is said that the present invention has a cutting machine for long objects as described in the above publication, and it is often difficult and difficult to change the position of a die or exchange it with another die. The problem was to solve the problem.

[0010]

[Means for Solving the Problems]

 That is, according to the present invention, two dies each having an insertion hole having the same shape as that of a long product are housed in a hollow portion open to the front and rear of the frame so that one is fixed and the other is linearly reciprocable. The driving piston member and the return spring member acted on the opposing outer peripheral surfaces of the movable die are held by the frame, and the pressing member for preventing the die from protruding back and forth is provided on the outer peripheral edge of each die. In a machine for cutting long objects that are stacked on top of each other and fixed to both the front and back sides of the frame, use either the holding member on the fixed die side or the holding member on the movable die side for the key with a small diameter portion and a large diameter portion. The fixing means is detachably fixed to the frame by a fixing means composed of a hole-shaped locking hole and an engaging portion having a shaft portion that inserts the small diameter portion and a head portion that can pass the large diameter portion.

With such a fixing means, the pressing member is fixed to the frame by inserting the shaft portion into the small diameter portion and overlapping the head portion around the small diameter portion, and the pressing member is moved along the frame to move the head portion. By matching and the large diameter part and separating from the frame, the hollow part is completely opened and the die can be taken out. That is, the position of the die is changed or the die is changed to another die by a very simple procedure of moving the pressing member in two directions without performing the procedure of turning the nut to attach and detach it.

Further, since the spring holder for return and the spring holder itself do not project into the hollow portion when the die is removed, the positioned spring holder can be easily fitted. Furthermore, when the pressing member to be removed is fixed by the lock pin, stable fixing can be achieved.

[0013]

[Embodiment of the invention]

 An embodiment of the present invention will be described with reference to the drawings. The frame 1 has a rectangular thick plate shape, has square hollow portions 2 penetrating both front and rear end surfaces, and is located above the drawing. Two mounting flanges 3 and 5 are formed on the outer peripheral surface in the front and rear direction in the thickness direction, and through holes 4 and 6 for mounting bolts, which will be described later, are provided in these mounting flanges 3 and 5. Further, a guide groove 7 communicating with the hollow portion 2 through the central portion of one mounting flange 5 is open to the end face and the upper face and is formed with a depth of half the thickness of the frame 1. At the bottom of the hollow portion 2 facing the guide groove 7, a recess 8 having the same width as the hollow portion and having a depth of half the thickness of the frame 1 is formed. Further, a handle 9 for transportation is attached to the outer peripheral surface located on one side.

On the surface of the frame 1 on the side of the mounting flange 3, a pressing member 11 composed of three plate parts 11a, 11b and 11c on the left and right sides is superposed, and the inner peripheral part of these is a hollow part 2a. It slightly overhangs the open surface so as to close the peripheral edge of the open surface.

The figure shows a form in which a U-shaped metal shaped material 71 is cut, and a base portion of a bracket 14 to which a pressing piece 13 for preventing the shaped material 71 from tilting at the time of cutting is attached to a tip end portion. Are stacked on the upper plate piece 11c and fixed by screwing the bolts 12 penetrating therethrough into the frame 1. The bracket 14 is T-shaped, and a support shaft 15 formed of a screw rod protruding from the pressing piece 13 is passed through the bracket 14 while the bracket 14 is sandwiched and nuts 16a and 16b are screwed into the pressing piece. 13 is fixed to the position adjustable.

On the surface of the frame 1 on the side where the guide groove 7 is provided, a rectangular frame-shaped retainer having a window hole 19 of the same size as the frame 1 and slightly smaller than the open surface of the hollow portion 2. Members 18 are overlaid. Grooves 20 that are vertically long and open to the outer end face are formed at the four corners of the pressing member 18, and have the same large diameter as the minor diameter of the groove 20 and a large circular shape formed at the lower end thereof. A keyhole-shaped locking hole 21 composed of a portion 21a and a small diameter portion 21b extending upward from the portion 21a is provided.

On the other hand, from the large diameter portion 21 a of the groove 20 to the tip end of the mounting bolt 22 which penetrates the frame 1 from both upper and lower end portions of the left and right plate portion pieces 11 a and 11 b and protrudes into the locking hole 21, respectively. An engaging portion piece 23, which is composed of a head portion 23a having a slightly smaller diameter and a shaft portion 23b having a slightly smaller diameter than the small diameter portion 21b, is screwed.

The locking hole 21 and the engaging portion piece 23 constitute a fixing means for the pressing member 18, and the head portion 23 a of the small diameter portion 21 b of the groove 20 is fitted in the small diameter portion 21 b of the shaft portion 23 b. The plate parts 11a and 11b and the pressing member 18 are fixed to the frame 1 by being overlapped with each other and cooperating with the head of the mounting bolt 22.

A lock pin 25 held through the mounting flanges 3 and 5 is engaged with the upper end surface of the pressing member 18. The lock pin 25 prevents the pressing member 18 from moving along the engaging portion 23 and places the pressing member 18 at a predetermined fixed position. Therefore, when the locking pin 25 is engaged, the pressing member 18 is You can check that it is fixed in place. Further, the lock pin 25 is disengaged by overcoming the elasticity of the presser spring 26 and pulling the knob 27 at the base end, and the presser member 18 is moved upward along the frame 1 so that the head 23a has a large diameter. One of the hollow parts 2 is completely opened by fitting the parts 21a and then separating them from the frame 1.

The two dies 29 and 31 for cutting the shape member 71 have a half thickness of the thickness of the frame 1 in the front-rear direction and are small plates having a size to be closely fitted in the hollow portion 2. It has groove-shaped insertion holes 30 and 32 that are formed in the same shape and have the same shape as the U-shaped profile 71 to be cut and that is loosely inserted therein. When these are stacked and housed in the hollow portion 2, the one located on the mounting flange 3 side is the fixed die 29, and the one located on the mounting flange 5 side is the movable die 31.

A substantially U-shaped downward spring support 34 is inserted in the recess 8, and a guide edge 37 projecting outwardly from both lower ends of a skirt portion 36 of the spring support 34 extends upward from a bottom of the recess 8. The stopper pin 40 is inserted, and a laterally extending presser pin 41 protruding to the inner surface of the recess 8 is in contact. A return spring member 42, which is a compression coil spring, is inserted between the receiving portion 38 of the spring receiving base 34 and the bottom surface of the recess 8, and the pressing pin 41 connects the upper surface of the receiving portion 38 to the hollow portion 2. Hold in the same position as the bottom. As a result, the two dies 29 and 31 are fitted into the hollow portion 2 with the insertion holes 30 and 32 aligned with each other, and the dies can be stored in the hollow portion 2 simply by lifting the driving piston member 48. Easy to do.

Therefore, the movable die 31 is held on the spring receiving base 34 in a state of overlapping with the fixed die 29 in the hollow portion 2, and is pressed down by the downward force while compressing the return spring member 42. When the holes 30 and 32 are crossed with each other, the edge corners on the overlapping surface side of the holes 30 and 32 act as cutting blades to cut the profile 71 inserted through these. On the lower surface of the center of the receiving portion 38, a leg piece 39 slightly higher than the hem portion 36 is projected, and when a highly rigid profile is cut, the leg piece 39 balances the bottom surface of the recess 8 to the return spring member 42. It is designed to absorb shocks.

In the embodiment shown in the figure, the insertion holes 30 and 32 are designed to loosely penetrate the shape member 71. Therefore, when the movable die 31 is driven as described above, the portion of the shape member 71 on the fixed die 29 side is changed. The reaction force tilts diagonally upward by the amount of the gap with the insertion hole 30. The pressing piece 13 described above is in contact with the upper surface of the shape member 71 to prevent inclination and cut on a plane perpendicular to the axis. Further, a gage block 44 is provided on the plate piece 11a located on the opposite side of the holding member 11 from the handle 9, and a gauge rod 45 extending in a direction parallel to the shape member is inserted and held therein. The cutting length can be set by adjusting the fixing position of the gauge rod 45 with the set screw 46 and applying the bent portion 45a at the tip to the end surface of the shape member 71 inserted into the insertion holes 30 and 32.

The movable die 31 is inserted into the hollow 8 from the hollow portion 2 by the driving piston member 48 fitted in the guide groove 7. The drive piston member 48 is retained in the guide groove 7 without coming out upward because the retaining pin 49 protruding laterally from the tip end is fitted into the restriction groove 50 formed in the pressing member 18. .

This cutting machine is placed on the floor at the site, and the reciprocating drive motor is facing downward to perform the cutting work. At that time, in order to keep it upright in a stable manner, the legs are attached to the lower ends of both side surfaces of the frame 1. The piece 52 is fixed by a stop bolt 53.

The cutting machine of such a form is preferably a crimp using hydraulic pressure as described in JP-A-2-104498 and JP-A-2-130769, and the tip of the piston of the compressor. It is used as a reciprocating drive motor by removing the joined movable die and the fixed die in front of it. That is, the bracket 61 having the fixed die attached to the front of the cylinder is fitted in the mounting flanges 3 and 5 in a mutually offset state, and the connecting bolt 64 is inserted into the shaft holes 62 and the through holes 4 and 6 and tightened. The reciprocating drive motor and the cutting machine of the present invention can be handled integrally, and the piston 63 and the driving piston member 48 are arranged on the same central axis line.

Then, the frame 1 is placed upright on the floor surface, the shape member 71 is inserted into the insertion holes 30 and 32 of the two dies 29 and 31, and the cutting point is cut by the gauge rod 45. The pressing piece 13 is brought into contact with the upper surface of the shape member 71.

Next, the piston 63 is advanced to press the driving piston member 48 to drive the movable die 31 to disengage the insertion holes 30 and 32, thereby cutting. When the piston 63 is retracted after the cutting is completed, the movable die 31 and the driving piston member 48 are returned to the position where the two insertion holes 30 and 32 are matched by the spring force of the return spring member 42. At this time, since the movable die 31 is placed on the spring receiving base 34, the spring force of the return spring member 42 can be evenly received and smoothly moved.

In the illustrated embodiment, two dies 29 and 31 having the same size are used. Therefore, when the corners of the insertion holes 30 and 32 that act as cutting blades are worn, they are replaced and the opposite surfaces are superposed. As a result, the dice 29 and 31 can be economically used. In addition, prepare multiple sets of dies of the same size with through holes corresponding to long objects to be cut such as shapes, bars and pipes, and replace them with the required ones on site. By this, one cutting machine can be effectively used.

When the position of the die is exchanged and the die is exchanged with another die, the pressing member 18 is moved and released from the engaging portion 23 as described above, so that the hollow die 2 on the movable die 31 side is moved. The surface is completely opened, and the fixed die 29 is pushed from the open surface on the opposite side and taken out from the hollow portion 2 together with the movable die 31. Further, the two dies 29, 31 are fitted into the hollow portion 2 from the completely open surface side, and the pressing member 18 is locked to the engaging portion 23.

Although the pressing member 18 is moved up and down to be attached and detached, the holding hole 21 may be formed laterally and moved left and right to be attached and detached. Further, the holding member 11 on the fixed die 29 side may be a single component similar to the holding member 18 instead of being three parts, and the holding member 11 on the fixed die 29 side is detachably fixed to the frame 1. Good.

[0032]

[Effect of the invention]

 As described above, according to the present invention, the pressing member is moved without engaging in troublesome procedures such as turning several nuts one by one to attach / detach to / from the bolt. It is very easy to attach / detach to / from the frame by separating or connecting them. For this reason, the positions of the fixed die and the movable die housed in the hollow part of the frame can be easily exchanged and exchanged on site, and when the spring support is installed, the die cannot be fitted into the hollow part. Further, it becomes easier, and the provision of the lock pin makes it possible to securely fix the pressing member at a predetermined position.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the form of FIG. 1 in an assembled state.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a left side view of FIG.

5 is an enlarged cross-sectional view taken along the line YY of FIG.

[Explanation of symbols]

1 frame, 2 hollow parts, 11, 18 holding member, 21 locking hole, 21a large diameter part, 21b small diameter part, 23 engaging part piece, 2
3a head part, 23b shaft part, 25 lock pin, 29 fixed die, 30, 32 insertion hole, 31 movable die, 34 spring holder, 42 return spring member, 48 drive piston member

Claims (3)

[Utility model registration claims] 1. Two dies having an insertion hole of the same shape as a long object are stacked and housed in a hollow portion open to the front and rear of a frame so that one is fixed and the other is capable of linear reciprocal movement. A driving piston member and a returning spring member acted on the opposing outer peripheral surfaces of the movable die are held by the frame, and a pressing member that prevents the die from protruding back and forth is provided in each of the dice. A long object cutting machine which is overlapped on the outer peripheral edge of the frame and fixed to both front and rear surfaces of the frame; one of the pressing member on the fixed die side and the pressing member on the movable die side is a small diameter part and a large diameter part. Removably fixed to the frame by a fixing means composed of a keyhole-shaped locking hole having a diameter portion, a shaft portion for inserting the small diameter portion, and an engaging portion having a head portion capable of passing the large diameter portion. Done A cutting machine for long objects. 2. The return spring member acts on the movable die through a spring receiving base, and the spring receiving base sets the movable die at a position where the insertion holes of the respective dice are aligned at the return position. 1. Positioned as
A machine for cutting long objects described in. 3. The machine for cutting a long object according to claim 1, wherein a lock pin that is fixed to the frame is detachably engaged with a removable pressing member of the frame.