JPH073912U - Portable perforator with automatic feed mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] A lightweight and compact portable selection device with an automatic feed mechanism that allows the core bit to be pressed against the object to be drilled with a substantially constant pressure regardless of the stroke position and the pressure adjustment is easy. To provide. [Structure] A portable perforation device equipped with an automatic feed mechanism including a constant load spring and a hydraulic damper, and in the same device, the constant load spring has a contraction biasing direction that is the same as or opposite to the perforation direction. Easy to adjust pressure, which is a combination of multiple unit constant force springs arranged in the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a portable perforator with an automatic feed mechanism, and more particularly, to a portable perforator with an automatic feed mechanism that is lightweight and compact, has a relatively long stroke, and is capable of adjusting the feed pressure.

[0002]

[Prior art and problems]

 Conventionally, an automatic feed mechanism used in a portable drilling device such as a drill or a core bit is an electric automatic feed mechanism as shown in FIG. 10, for example, which drives a pinion from an electric motor 201 with a reducer via an electromagnetic clutch. Therefore, it is inevitable that the structure will become complicated and the weight will increase, and it will not be used for the portable perforation device used for perforating the ceiling and side walls of concrete structures, Hume pipes, U-shaped grooves, etc. There was a problem that was difficult. In addition, these electric automatic feeders need to be provided with a controller 202 for switching the feed direction, controlling the electric current of the electric motor, and the like. There were cases where it was provided separately, for example, on the floor, but it was inevitable that the structure would become complicated and the weight would increase. The operation of the punching motor (about 3 kW for a large one) caused a voltage drop in the lamp power supply, which could cause a malfunction.

Further, for the sake of simplification, a simple coil spring, a coil spring internal cylinder, or the like was sometimes used. However, linear extension or compression stroke is small for the length, and when vibration occurs, There was a problem that dumping (convergence) was not good.

So-called gas sprinkling, which is a gas-filled cylinder that utilizes compression / expansion restoration of gas, has also been attempted, but this has the advantage that it has better convergence for vibration than coil springs, but due to accidental penetration, etc. When the load suddenly disappears or when the drilling head is moved without load, the restoring pressure of the gas spring causes the lever 8 to rapidly rotate and the rotary blade to move rapidly in the axial direction. There was a risk of hitting the surface of the perforated object or the like, or hitting the operator's body and getting injured.

Therefore, the present inventors have found that these problems can be solved by combining a gas spring with a hydraulic damper or other hydraulic damper to form an automatic feed mechanism, and have already applied for a new model registration. is there.

However, the restoration behavior of the gas spring still basically complies with Hook's law, although the spring constant is smaller than that of the coil, etc., so that it depends on the stroke position between the tip of the core drill and the object to be drilled. There was a problem that it was unavoidable that the pressure exerted on the subject changed.

[0007] The function of the hydraulic damper is to suppress a sharp edge movement in a transient phenomenon such as in the case of suddenly becoming unloaded due to accidental penetration or the like, or to converge vibration. Therefore, no special function can be exerted during the quasi-static movement of the cutting edge.

Therefore, the present inventors have found that by using a constant force spring in place of the gas spring, a constant cutting edge pressure can be obtained regardless of the stroke position, and the present invention has been achieved.

[0009]

[The purpose of the device]

 An object of the present invention is to provide a portable perforation device with an automatic feed mechanism, which is lightweight and compact, and can press the core bit against the object to be perforated with a substantially constant pressure regardless of the stroke position.

Another object of the present invention is to facilitate feed pressure adjustment.

[0011]

According to the present invention, in a portable perforation device with an automatic feeding mechanism, which comprises a guide, a perforating head slidable along the guide, and an automatic feeding mechanism for axially driving the perforating head, A portable perforation device with an automatic feeding mechanism, characterized in that the feeding mechanism is an automatic feeding mechanism provided with a constant force spring and a hydraulic damper (Claim 1). The portable perforation device with an automatic feed mechanism (claim 2) according to claim 1, which is a combination constant load spring comprising a combination of a plurality of unit constant load springs arranged in the same or opposite directions. The portable perforation device with an automatic feed mechanism according to claim 2, wherein the spring is a combination constant load spring composed of two unit constant load springs in the drilling direction and one unit constant load heavy spring in the opposite direction. 3) and constant force spring A portable perforator with an automatic feeder structure (claim 4) according to claim 1 is a number of constant force springs with hooks.

The present invention will be described in detail below with reference to examples.

[0013]

【Example】

 1 is a side view of the first embodiment of the present invention (when the drilling head is raised), FIG. 2 is the same side view (when the drilling head is lowered), FIG. 3 is a view taken along the line AA of FIG. 2 (rear view), and FIG. Is a front view of Example 2 using a constant load spring on one side, FIG. 5 is a front view of Example 3 using constant load springs on both sides, and FIG. 6 is an Example 4 using a constant load spring on the back side. FIG. 7 is a side view of another embodiment 5, FIG. 8 is a perspective view of a rotary constant load spring, FIG. 9 is a stress-strain characteristic diagram of the constant load spring, and FIG. 10 is a conventional electric automatic feed. It is a portable punching device with a mechanism.

In FIGS. 1, 2, 3, 4, 5, 6, 7, and 8, 1 is a portable punching device with an automatic feeding mechanism, 2 is a guide column, 3 is a mount, 4 is a rack, 5 is a damper, 6 is a slide block, 7 is a pinion shaft, 7A is a pinion, 8 is a lever, 9 is a drilling head, 10 is a motor, 11 is a reducer, 12 is a core bit, 15 is a hook fixing metal fitting, 20 is a constant force spring, 21 Is a constant load spring extension, 25 is a hook, 30 is a rotary constant load spring, 30A is a holder, 31 is a rotary constant load spring extension, 35 is a rotary constant load spring hook, and 36 is a rotary constant load. The rotation axis of the spring, 100 is the object to be drilled.

First, a first embodiment to a fifth embodiment will be described in order.

Embodiment 1 In FIGS. 1, 2, and 3, the mounting base 3 is mounted on the object to be drilled 100 by mounting bolts 3A. A guide column 2 extends vertically (or horizontally or at any other angle) from the mount 3. A rack 4 is fixed to the front side (left side in FIG. 1) of the guide column, and is engaged with a pinion 7A fixed to a pinion shaft pivotally attached to a slide block 6.

The slide block 6 is loosely fitted vertically so as to surround the outside of the guide column 2. The slide block 6 is provided with, for example, a plurality of rollers or ball bearings with a needle roller bearing between the guide column 2 and the slide block 6 so as to prevent the slide from becoming difficult due to the imbalance between the front, rear, left and right of the load. There is.

The lever 8 is fixed to the pinion shaft 7 and moves the slide block 6 against the gravity of the slide block 6 or the urging force of a constant force spring described later, and the core bit 12 is punched. Used for the purpose of increasing the applied pressure when the 100 is initially bitten.

A motor 10, a speed reducer 11, and a drilling head 9 including a core bit 12 are fixed to the slide block 6, and the slide block 6 and the slide block 6 can move along the guide column 2.

A constant force spring 20 is pivotally attached to the lowermost portion of the slide block 6 on the punching head side while being wound around the reel 20A. A hook 25 having a J-shaped cross section made of a metal plate is fixed to the tip end of the constant load spring extension portion 21 by a rivet or the like, and the hook 25 is separately arranged and fixed to the lower portion of the guide column to form a rod shape. It is locked to the hook fixture 15 of.

An oil damper 5 is provided between the lower part of the slide block 6 and the guide column 2 to stabilize transient phenomena such as accidental penetration and to suppress and converge vibration.

The constant force spring is a kind of mainspring spring having a substantially constant restoring urging force at a constant stroke or more, such as Copling (trademark) manufactured by Osaka Heat Treatment Co., Ltd. Its characteristics are as shown in Fig. 9. The load does not change even if the elongation increases, and the load remains constant. The initial load is large. It has a large elongation and can be used up to 30 to 50 times the original shape. A large amount of elastic energy is stored when stored in the same space. Operates smoothly and has little friction.

It has the following features.

Therefore, the elastic restoring force extremely suitable for the use of the present invention is exhibited. If the unit restoring urging force of the constant load spring 20 is R, the pressing force in this case is 1R. Example 2 This is a case where the constant weight spring 20 is used only on one side as shown in FIG. As shown in FIG. 5, if the constant load springs 20, 20 on both sides are used, the pressing force is 2R, but if only one side is used, the pressing force can be easily reduced to 1/2, which is 1R. (Example 3) As shown in FIG. 5, the pressing force is 2R. However, in this case, the constant force spring is not set on the back side. (Embodiment 4) In FIG. 6, two constant force springs 20 and 20 arranged in parallel on the front side and one rotary constant force spring 30 on the rear side are provided.

The rotary type constant load spring 30 is as shown in FIG. 8, and has a structure capable of 180 ° rotation stop by a rotary shaft 36 and a known click stop mechanism (not shown). That is, the holder 30A of the constant load spring 30 is pivotally attached to the slide block 6 by the rotating shaft 36. Therefore, the extension portion 31 and the hook 35 of the constant force spring 30 can be selectively extended and locked in the upward and downward directions.

In the fourth embodiment shown in FIG. 6, the pressing force of the drilling head is 2R + R = 3R because the locking is performed downward. (Embodiment 5) In FIG. 7, the pressing force of the sliding block is 2R by the two constant load springs on the front side, -R by the one upward rotary constant load spring on the rear side, and therefore 2R-R =. It becomes R.

Further, the restoring biasing force of each constant force spring is set to an integral multiple of R or 2R, 3R, or 1/2 or 1/3, which is an integer fraction, so that the total pressing force can be easily obtained. It can be adjusted.

[0028]

[Effect of device]

 By carrying out the present invention, all of the above objects are achieved.

That is, a portable perforation device with an automatic feed mechanism that is lightweight and compact, and that can press the core bit against the object to be perforated with a substantially constant pressure regardless of the stroke position and that has an automatic feed mechanism that facilitates pressure adjustment is provided. It

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment (when a drilling head is raised).

FIG. 2 is a side view of the first embodiment (when the drilling head is lowered).

FIG. 3 is a view on arrow AA of FIG.

FIG. 4 is a front view of a second embodiment using a constant force spring on one side.

FIG. 5 is a front view of a third embodiment using constant load springs on both sides.

FIG. 6 is a side view of the fourth embodiment using a constant load spring on the back side.

FIG. 7 is a side view of another embodiment.

FIG. 8 is a perspective view of a rotary constant load spring.

FIG. 9 is a stress-strain characteristic diagram of a constant load spring.

FIG. 10 is a side view of a conventional example.

[Explanation of symbols]

 1 Portable Punching Device with Automatic Feeding Mechanism 2 Guide Pillar 3 Mounting Base 4 Rack 5 Damper 6 Slide Block 7 Pinion Shaft 9 Drilling Head 12 Core Bit 15 Hook Fixing Bracket 20 Constant Load Spring 21 Fixed Load Spring Extension 25 Hook 30 Fixed Type Constant force spring 100 Perforated object

Claims (4)

[Scope of utility model registration request] 1. A portable perforation apparatus with an automatic feed mechanism, comprising a guide, a perforation head slidable along the guide, and an automatic feed mechanism for axially driving the perforation head, wherein the automatic feed mechanism has a constant load. A portable perforation device with an automatic feed mechanism, which is an automatic feed mechanism including a spring and a hydraulic damper. 2. The combination constant load spring according to claim 1, wherein the constant load spring is a combination of a plurality of unit constant load springs arranged such that the contraction biasing direction is the same as or opposite to the drilling direction. Portable perforation device with automatic feed mechanism described. 3. The portable with automatic feed mechanism according to claim 2, wherein the constant load spring is a combination constant load spring of two unit constant load springs in the drilling direction and one unit constant load spring in the opposite direction. Punching device. 4. The portable perforation device with an automatic feed mechanism according to claim 1, wherein the constant load spring is a plurality of constant load springs with hooks.