JPH07100771A - Torque driver provided with marking function - Google Patents

Abstract

PURPOSE:To tighten the bolts, etc., having a variety of shapes and kinds by each proper torque and easily recognize the bolts, etc., for which tightening is completed, by installing a hollow shaped cartridge on a driver body. CONSTITUTION:When the tightening of bolts, screws, etc., reaches a prescribed torque, the connection part between a driver body and a driver bit 20 is revolved in idling by the action of a clutch part 30. The engagement and disengagement of a ball 35 with the recessed parts of a driver body side frictional plate 33 and Ee recessed part of a driver bit side frictional plate 34 are repeated, and the ink for marking is jetted from the top end of a cartridge 40 by a projection part through the vibration generated during the idling. The ink for marking which is jetted is discharged from the top end of the driver bit 20 through the ink hole 23 of the driver bit 20, and marking is carried out on the head parts of the bolts, screws, etc. Accordingly, the bolts, screws, etc., for which tightening is completed can be easily recognized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque driver for tightening bolts, screws and the like with a specified torque, and particularly a marking function for making it possible to easily confirm bolts, screws, etc. which are tightened with a specified torque. The present invention relates to a torque driver.

[0002]

2. Description of the Related Art When a bolt, a screw, or the like to be tightened is given a rotation for tightening and the tightening reaches a specified torque, the connection between the driver body and the driver bit idles due to the action of the clutch and tightens. The torque driver for stopping the operation is capable of tightening bolts, screws and the like with a prescribed torque, and can prevent overtightening, and is therefore used in a wide range of fields such as electric / electronic devices and the mechanical industry. However, although such a torque driver can tighten bolts, screws and the like with appropriate torque, it is not possible to distinguish the bolts, screws and the like after tightening from the appearance. For this reason, conventionally, the bolts, screws, and the like for which the tightening has been completed are determined, that is, the completion of the tightening is confirmed only by the memory of the operator who performed the tightening. However,
The workers' memories tended to be ambiguous, and I often forgot to tighten them. To prevent this, the bolts, screws, etc. must be tightened again with a torque driver for confirmation, and as a result, work efficiency has been significantly impaired.

In view of this, in Japanese Unexamined Patent Publication No. 1-114279, the tip of the driver bit is provided with an ink stamp that moves in conjunction with a torque release mechanism that is slidably held in the axial direction, so that bolts and the like are tightened. A torque driver has been proposed which can easily find a bolt or the like that has been forgotten to be tightened by marking the head of the bolt or the like when the torque reaches a prescribed torque.

[0004]

However, since the torque driver described in Japanese Patent Laid-Open No. 1-114279 has a structure in which an ink stamp is provided inside the box driver type bit, bolts or screws other than hexagon bolts are used. However, there is a problem that it cannot be applied when tightening etc., and that even a hexagon bolt cannot be used if the size is different.

The present invention has been proposed in order to solve the problems of the prior art as described above, and bolts, screws and the like of all shapes and types can be tightened with an appropriate torque, and the tightening The purpose is to provide a torque driver with a marking function that allows you to easily check completed bolts, screws, etc.

[0006]

In order to achieve the above object, a torque driver with a marking function according to the present invention comprises a driver body and a driver bit connected to the driver body. In a torque driver having a clutch portion that idles a connection portion between a driver body and a driver bit when a torque is reached, the driver body is filled with marking ink inside, and the marking ink is ejected on one end side. A hollow cartridge having a tip portion and an ejection portion for ejecting the marking ink from the tip portion due to vibration generated when the connecting portion of the driver body and the driver bit idles is provided on the other end side. , A marking marker ejected from the tip of the cartridge at the axial center of the driver bit. The ink hole through which the ink passes is formed, and one end of the ink hole is formed as a receiving hole into which the front portion of the cartridge is inserted, and preferably, the driver bit is detachable from the driver body. There is.

[0007]

According to the torque driver with a marking function of the present invention having the above-described structure, when the tightening of the bolts, screws, etc. reaches the specified torque, the connection between the driver body and the driver bit idles due to the action of the clutch. Due to the vibration generated at that time, the marking ink in the cartridge is ejected from the tip of the driver bit through the ink hole of the driver bit to mark the head of the bolt, screw or the like.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a torque driver with a marking function of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an embodiment of a torque driver with a marking function according to the present invention, and FIG. 2 is a sectional view of a main part in FIG. As shown in these drawings, the torque driver with a marking function of the present embodiment is composed of a driver body 10 and a driver bit 20 attached to the center of one end of the driver body 10. This driver bit 2
0 is detachable from the driver body 10 as described later, and the shape of the tip 21 that abuts the bolt, screw, etc. corresponds to the type, shape, size, etc. of the bolt, screw, etc. to be tightened. It can be exchanged for what you have done. In this embodiment, as shown in FIG. 1, a flat-blade screwdriver-shaped one is attached.

The driver body 10 comprises a body portion 11 and a grip portion 12 formed with a handle to be screwed into and connected to the body portion 11. Inside the body 11, as shown in FIG. 2, a clutch portion 30, a hollow cartridge 40 filled with marking ink, and a grip portion 50 for gripping and fixing the driver bit 20. Is prepared.

The clutch portion 30 is a torque setting ring 31 screwed to a threaded rod protruding from the center of the grip portion 12.
2, a spring 32 whose elastic force is adjusted by the torque setting ring 31, and a driver body side friction plate 33 which is constantly pressed by the spring 32 in the leftward direction in FIG. 2 to transmit the rotational force from the grip portion 12. The driver bit side friction plate 34, one surface of which faces the driver body side friction plate 33 and is in contact with the driver body side friction plate 33, and the recesses provided at arbitrary positions on the circumferences of the contact surfaces of the friction plates 33, 34 are loosely fitted and fitted. It is composed of a ball 35 which is arranged in combination.

The cartridge 40 has a tip portion 41 for ejecting the marking ink filled therein at one end, and an ejection portion 42 for ejecting the marking ink from the tip portion 41 at the other end. It is provided. The cartridge 40 is supported by the collet body 51 by the tip portion 41 penetrating a hole formed at the center of the collet body 51 described later. The injection part 42 includes a two-layer one-side piston 42a having a sealed air layer 42c in the middle.
(Front portion 41 side), the other side piston 42b,
The other-side piston 42b is provided with a check valve-equipped ventilation hole 43 for adjusting the flow of air into and out of the air layer 42c. Here, this check valve-equipped ventilation hole 43 is
When b is retracted (moved to the right in FIG. 3), the check valve is opened to allow air to flow into the air layer 42c from the outside, thereby stopping the one-side piston 42a and moving the other-side piston 42b forward (see FIG. 3), the one-side piston 42a is moved forward by closing the check valve and blocking the outflow of air from the air layer 42c to the outside. Therefore, the other side piston 4
2b repeatedly moves forward and backward (moves in the left-right direction in FIG. 3), whereby the air gradually stays in the air layer 42c,
The one side piston 42a does not move backward but always moves forward (see FIG.
Move to the left). Also, the other side piston 42
A vibration transmission portion 44 having one end fixed to the driver body side friction plate 33 is connected to b.

The grip portion 50 is composed of a collet body 51 for gripping the driver bit 20 and a fixing nut 52 screwed into the collet body 51, and is a kind of collet chuck. The collet body 51 is fixed to the driver bit side friction plate 34, and a hole through which the tip 41 of the cartridge 40 penetrates is formed at the center of the base. Further, the tip end side of the collet body 51 projects to the outside of the body portion 11, and a screw thread with which the fixing nut 52 is screwed is provided on the outer peripheral surface of the projecting portion. Further, on the inner peripheral surface of the collet body 51, a driver bit 2 described later is provided.
There is provided a protrusion that fits into the fixing hole 22 of No. 0.

In the vicinity of the other end side of the driver bit 20, there is provided a fixing hole 22 for fitting with the projection of the collet body 51. Further, a fine ink hole 23 through which the marking ink ejected from the tip portion 41 of the cartridge 40 passes is formed at the axial center of the driver bit 20, and the other end of the ink hole 23 has a collet. A receiving hole 24 into which a front portion 41 of the cartridge 40 that penetrates the main body 51 is inserted is formed. The receiving hole 24 has a larger diameter than the ink hole 23.

The torque driver with the marking function of the present embodiment having such a structure operates as follows. First, before performing the tightening work, the driver bit 20 corresponding to the bolt, screw or the like to be tightened is attached to the driver body 10. Here, the driver bit 20
For replacement, first, loosen the screwing of the collet body 51 of the grip portion 50 and the fixing nut 52, pull out the attached driver bit 20 from the collet body 51, and then insert a new driver bit 20 into the collet body 14. Then, the fixing nut 15 is tightened and fixed. Next, the tip 21 of the driver bit 20 is applied to the head of a bolt, screw or the like, and the grip 12 is rotated to tighten it. Then, when the bolts, screws, etc. are further tightened in a state where the tightening has reached the specified torque, the clutch portion 30 operates. That is, in the clutch unit 30, normally, the spring 32 whose torque is set by the torque setting ring 31 is provided on the driver main body side friction plate 3.
3, the driver main body side friction plate 33 and the driver bit side friction plate 34 are in pressure contact with each other, and are integrated by the frictional force. Therefore, the rotation applied to the grip portion 12 is transmitted to the driver bit 20 via the clutch portion 30 (the spring 32, the driver body side friction plate 33 and the driver bit side friction plate 34). However, when the bolts and the like are tightened to reach the specified torque, the driver main body side friction plate 33 does not rotate even if it is further rotated, so that the driver main body side friction plate 3 is rotated.
For 3, the driver bit side friction plate 34 idles.

As described above, when the driver bit side friction plate 34 idles with respect to the driver body side friction plate 33, the balls 35 are fitted into the recesses of the driver body side friction plate 33 and / or the driver bit side friction plate 34, Repeat the loss.
As a result, the driver body side friction plate 33, which is constantly pressed to the left in FIG.
Vibration is repeated in the left and right directions at. This vibration is transmitted to the other piston 42b of the injection portion 42 via the vibration transmission portion 44, and therefore the other piston 42b also vibrates in the left-right direction in FIG. As a result, the action of the check valve-equipped ventilation hole 43 of the other side piston 42b causes the one side piston 42a to move leftward in FIG. The ink is pushed by the one-side piston 42a, ejected from the tip portion 41, flows out into the ink hole 23 of the driver bit 20, and further passes through the ink hole 23 and the tip 2 of the driver bit 20.
It is injected from 1 and the heads of bolts, screws, etc. are marked. In the actual use of the torque driver with the marking function, the other side piston 42b of the ejection portion 42 is vibrated several times before the use, and the marking ink is pre-filled to the position of the tip 21 of the ink hole 23. Is desirable.

In this way, bolts, screws, etc., which have been tightened with an appropriate torque and are marked, can be discriminated from the appearance at a glance. In addition, as described above, when the shape, size, etc. of the bolt or screw to be tightened is changed, the driver bit 20 is
It can be dealt with by replacing it with a screw compatible one. For example, when tightening the hexagon bolt, the driver bit 20 shown in FIG. 5 may be attached to the driver body 10. Further, the attaching / detaching means of the driver bit 20 is not limited to the above-mentioned collet type,
Various known attachment / detachment means can be used.

[0017]

As described above, according to the torque driver with the marking function of the present invention, bolts and screws of all shapes and types can be tightened with a proper positive torque, and the tightened bolts and screws can be tightened. Etc. can be easily confirmed.

[Brief description of drawings]

FIG. 1 shows a perspective view of an embodiment of a torque driver with a marking function according to the present invention.

FIG. 2 is a cross-sectional view of the essential parts of the embodiment of FIG. 1 of the torque driver with a marking function according to the present invention.

FIG. 3 is a sectional view of a main part of an embodiment of a torque driver with a marking function according to the present invention.

FIG. 4 is a sectional view of a main part of an embodiment of a torque driver with a marking function according to the present invention.

FIG. 5 is a cross-sectional view of essential parts of another embodiment of the torque driver with a marking function according to the present invention.

[Explanation of symbols]

 10 ... Driver main body 11 ... Body part 12 ... Grip part 20 ... Driver bit 21 ... Tip 22 ... Fixing hole 23 ... Ink hole 24 ... Receiving hole 30 ... Clutch part 31 ... Torque setting ring 32 ... Spring 33 ... Driver body side friction plate 34 ... Driver bit side friction plate 35 ... Ball 40 ... Cartridge 41 ... Tip part 42 ... Injection part 42a ... One side piston 42b ... Other side piston 42c ... Air layer 43 ... Check valve vent hole 44 ... Vibration transmission part

Claims (2)

[Claims] 1. A torque comprising a driver main body and a driver bit connected to the driver main body, and a torque provided with the driver main body and a clutch portion for idling a connection portion between the driver main body and the driver bit when a certain torque is reached. In the driver, the driver body is internally filled with marking ink, and one end has a tip portion from which the marking ink is ejected, and the other end has a connecting portion between the driver body and the driver bit. A hollow cartridge having an ejection portion for ejecting the marking ink from the tip portion by vibration generated when idling is provided, and the marking ink ejected from the tip portion of the cartridge is provided at the axial center of the driver bit. An ink hole that passes through is formed, and the tip of the cartridge is inserted into one end of this ink hole. Marking function torque driver, characterized in that formed as receiving holes that. 2. The torque driver with a marking function according to claim 1, wherein the driver bit is detachably attached to the driver body.