JP2005169584A - Screw holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To use a screw hoder even in an inclined posture of a driver (2) relative to a screw hole (50) without carelessly dropping a held screw (4), regarding the screw holder holding a head (40) of the screw (4) by being mounted to the tip of the screwdriver (2). <P>SOLUTION: The screw holder is composed of a shaft holding cylinder (10) which is a cylinder made of an elastic member opened to one end side, and has an insertable shaft (20) of the screwdriver (2) in an approximately tight fitting state, and a screw holding cylinder (11) which is opened to the other end side, and can store-hold the head (40) of the screw (4) in a tight fitting state. The screw holder is provided with an insertion preventive means (13) preventing further insertion in a state that the shaft (20) is inserted by a predetermined depth in the shaft holding cylinder (10). When the shaft (20) reaches the most deep inserted position, an engaging projection part (21) of the tip is engaged with an engaging groove (42) of the head top surface of the screw (4) in the screw holding cylinder (11), and an annular recessed groove (12) is formed along the periphery on the outer peripheral surface of the cylinder corresponding to the boundary between the shaft holding cylinder (10) and the screw holding cylinder (11). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a screw holder, and more particularly to a screw holder used by being attached to the tip of a driver.

When attaching various machine parts by screwing, attachment of screws or removal at the time of disassembling often involves work on narrow places or recessed places. When attaching or detaching a screw to or from such a location, the head of the screw cannot be supported with a finger so that the shaft of the screw is aligned with the shaft hole. For this reason, for example, a screw holder (30) as disclosed in Japanese Utility Model Laid-Open No. 1-125175 and Japanese Patent Application Laid-Open No. 2001-1275 may be used.
As shown in FIG. 3, the screw holder (30) includes a shaft holder (30) to be fitted on the tip of the shaft (20) of the driver (2) and a head (40) of the screw (4). A cylindrical body comprising a screw holding portion (31) that surrounds and holds the screw is generally used.

  In order to attach the screw (4) to the screw mounting position in a narrow place or a recessed place using this screw holder (3), the engagement protrusion (21) at the tip of the shaft (20) of the driver (2) ) Is inserted from the open end of the screw holder (3) on the shaft holder (30) side, and the head (40) of the screw (4) is inserted from the open end of the screw holder (31) side. Then, the engagement protrusion (21) of the driver (2) is engaged with the engagement groove (42) of the head (40) of the screw (4). Thus, the driver (2) and the screw (4) are integrated with each other via the screw holder (3). In this state, hold the handle (22) of the screwdriver (2) and insert the tip of the screw shaft (41) of the screw (4) into the screw hole (50) of the screw mounting surface (5). When the screwdriver (2) is rotated in the tightening direction, the screw (4) is screwed.

Conversely, to remove the screw (4) using this screw holder (3), hold the handle (22) of the screwdriver (2) and attach it to the tip of the shaft (20). While forcibly fitting the open end of the screw holder (31) of the screw holder (3) to the head (40) of the screw (4), the engaging projection (21) Engage with the engaging groove (42) on the top surface of the head (40). Then, the screw (4) may be removed by rotating the screwdriver (2) in the opposite direction.
In this way, even if the head (40) of the screw (4) cannot be directly supported by a finger, the screw (4) can be applied to a narrow place or a recessed place by using the screw holder (3). ) Is easy to install and remove.
Japanese Utility Model Publication No. 1-125175 JP 2001-1275 A

  However, in the conventional screw holder (3) described above, the screw holder is inserted in a state where the shaft portion (20) of the driver (2) is inserted too much into the screw holder (3) from the shaft holder (30) side. When the head part (40) of the screw (4) is held by the part (3), the screw (4) is fitted into the screw holding part (31) shallowly. Therefore, in some cases, the screw holder (31) cannot hold the head (40) of the screw (4), and the screw (4) is removed from the screw holder (3) during the screw installation or removal. There is an inconvenience such as dropping. In particular, if the screw (4) is dropped in a narrow part or a deep part, it takes time to remove the screw (4), resulting in poor workability.

  Further, in the conventional screw holder (3), the shaft holder (30) and the screw holder (31) are formed in a concentric cylindrical shape, so that the screw hole (50) to which the screw (4) is attached On the other hand, if it is not a place where the screwdriver (2) can be inserted straight, it is difficult to attach and remove the screw (4) using the screw holder (3). Even if the screw holder (3) is made of an elastic material, the position where the screw holder (3) is bent cannot be specified. It can be bent and become unusable.

  According to the present invention, in the “screw holder that is attached to the tip of the driver and holds the head of the screw”, the screw that has been once held is not dropped inadvertently, and the driver is inserted obliquely into the screw hole. However, it is an object of the present invention to provide a screw holder capable of attaching and removing screws.

(1) The screw holder of the invention according to claim 1 is “a cylindrical body made of an elastic member,
The cylinder is open to one end and the shaft of the driver can be inserted into a substantially tight fit, and the cylinder is open to the other end and the head of the screw can be stored and held in tight fit. It is composed of a screw holding cylinder part,
Insertion preventing means for preventing further insertion in a state where the shaft is inserted into the shaft holding cylinder part at a predetermined depth is provided,
When the shaft reaches the maximum insertion position, the engagement protrusion at the tip of the shaft is engaged with the engagement groove on the top surface of the screw head stored and held in the screw holding cylinder portion. Is set,
An annular groove is formed along the circumferential direction on the outer peripheral surface of the cylinder corresponding to the boundary between the shaft holding cylinder and the screw holding cylinder.
The above means operates as follows.
Since the shaft holding cylinder portion of the cylinder is set so that the driver's shaft can be fitted in a substantially tight fit state, if the shaft is inserted from the one end side of the cylinder and forcibly pushed in, the shaft is It can be inserted into the body and will not fall out accidentally in the inserted state. Then, when the insertion is performed at a predetermined depth, further insertion is blocked by the action of the insertion blocking means. That is, the position where insertion is blocked by the insertion blocking means is the most insertion position of the shaft in the cylinder. In addition, since the cylindrical body is made of an elastic material, if the inner diameter of the screw holding cylindrical portion on the other end side is substantially equal to the outer diameter of the head of the screw or slightly smaller, By forcibly pushing the head of the screw into the open end of the screw holding cylinder, the open end of the cylinder is elastically expanded. As a result, the screw held in the screw holding cylinder can be tightly fitted around the head of the screw by the elastic restoring force of the cylinder. Further, in a state where the shaft of the driver is inserted into the shaft holding cylinder portion until reaching the most insertion position, the engagement protrusion at the tip of the shaft is the top surface of the screw head in the screw holding cylinder portion. Since the engagement groove is set so that it can be engaged with the engagement groove, the engagement protrusion protrudes into the screw holding cylinder. Therefore, strictly speaking, the shaft holding tube portion holds a rod-shaped portion of the driver shaft excluding the engagement protrusion, and the engagement protrusion includes the shaft holding tube portion and the screw holding tube portion. It will be located in the boundary part. And the said cylinder is easy to bend along the annular ditch | groove formed in the outer peripheral surface of the said cylinder corresponding to this boundary part.

(2) The screw holder of the invention according to claim 2 is the screw holder according to claim 1, wherein the insertion preventing means is an inner peripheral surface of the cylindrical body corresponding to a position where the annular groove is formed. The inner diameter of the annular protrusion is set smaller than the diameter of the shaft of the driver.In this case, the cylinder is formed of the shaft holding cylinder and the shaft. A constricted portion recessed inward is formed in an annular shape at a predetermined position that becomes a boundary portion with the screw holding cylinder portion, and an annular convex portion projecting to the inner surface side of the constricted portion is formed on the engagement protruding portion of the driver. The proximal end portion is caught and insertion of a further shaft is prevented. In the most insertion position of the shaft, the annular convex portion surrounds the engaging protrusion of the shaft, and since the annular concave groove is formed in the surrounding portion, the cylindrical body can be bent. Yes.

(3) The screw holder of the invention according to claim 3 is the screw holder described above, wherein “the shaft holding cylinder part and the screw holding cylinder part are each formed in a cylindrical shape, and the screw holding cylinder A tapered portion that expands in diameter toward the open end is formed on the inner peripheral surface of the open end of the portion ”, and by forming the shaft holding cylinder portion and the screw holding cylinder portion into a cylindrical shape, the driver The shaft portion and the head side surface of the screw are surrounded in close contact with the inner surface of the cylindrical body. Further, since the inner surface of the open end of the screw holding cylinder part is formed with a tapered portion, the thickness of the screw holding cylinder part becomes thinner toward the open end. Therefore, the open end of the screw holding tube portion is easily deformed. When the open end of the screw hold tube portion is forcibly pressed against the screw mounting surface, the taper surface of the tapered portion becomes the screw mounting surface. It can be made to change into the mode which contacts. Since the screw can be attached and removed by a screwdriver while the open end of the screw holding cylinder is deformed, the screw may be held at a position deeper than the tapered portion before or after attachment. it can.

(4) A screw holder according to a fourth aspect of the present invention is the screw holder according to any one of the above claims, wherein the cylindrical body is transparent. Thereby, it is possible to check the engagement between the tip of the driver and the head of the screw from the outside of the cylinder.

  As described above, according to the first aspect of the present invention, the most inserted position of the driver shaft is determined by the insertion preventing means in the cylinder and is not inserted any deeper. The held screw will not be accidentally pushed by the shaft and fall off from the open end. In this way, the screwdriver shaft is inserted into the shaft holding cylinder, the screw head is fitted into the screw holding cylinder, and the engagement protrusion at the tip is locked in the engagement groove on the top surface of the screw. In addition, the set state of the screwdriver, the screw, and the screw holder is maintained unless it is forcibly separated. Therefore, there is no inconvenience that the screw is inadvertently dropped before being screwed into the screw hole or after being removed, and the screw can be easily and reliably attached to the narrow portion or the recessed portion. .

  In addition, an annular groove is formed in the boundary portion between the screw holding cylinder portion and the shaft holding cylinder portion where the engagement protrusion of the driver located at the most insertion position is located, and the cylinder body is easy in this portion. Can be bent. Therefore, even when the screw hole axis and the driver shaft insertion direction are slightly deviated from each other, the cylinder body is moved in a predetermined direction and a predetermined direction according to the angle formed by the screw hole axis and the axis of the engaging protrusion. It can be used by bending at an angle of. Thus, since it can be used even in a state in which the driver is inclined with respect to the screw hole, the application range at the screw attachment location is expanded.

According to the second aspect of the present invention, only by forming a constriction at a predetermined position of the cylindrical body, an annular convex portion that functions as an insertion preventing means and an annular concave portion that constitutes a bent portion are simultaneously formed. Therefore, it is possible to easily form a screw holder that can securely hold the head of the screw and bendable according to the insertion angle of the shaft with respect to the screw hole.
Furthermore, according to the invention concerning Claim 3, the certainty of the holding | maintenance state of the shaft of a driver and the head of a screw in a shaft holding cylinder part and a screw holding cylinder part improves. Further, since the open end of the screw holding tube portion is formed thin so that it can be easily deformed when the screw is attached or removed, the screw can be stored in a position deeper than the open end. Thus, the screw can be held more securely, and the screw can be prevented from being accidentally dropped.

  According to the invention of claim 4, since it is possible to visually confirm the degree of engagement between the engagement protrusion at the tip of the driver and the engagement groove at the head of the screw in the cylinder, the screw can be attached and detached. Work can be done more reliably.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view showing a state in which a shaft portion (20) and a screw (4) of a driver (2) are integrally held via a screw holder (1) according to an embodiment of the present invention. The screw holder (1) is an elastic transparent cylinder molded from a transparent vinyl chloride resin, and stores and holds the shaft (20) of the driver (2). And the screw holding cylinder part (11) for storing and holding the head part (40) of the screw (4) is configured concentrically. The shaft holding cylinder (10) is a cylindrical body that is closely fitted to the shaft (20) of the driver (2), and the screw holding cylinder (11) is an inner diameter of the shaft holding cylinder (10). The screw (4) head (40) so that the head (40) of the screw (4) can be housed and held in a close-fitting state by the elastic return force of the resin. The diameter is substantially the same as or slightly smaller.

  The boundary portion between the shaft holding tube portion (10) and the screw holding tube portion (11) has a shape recessed inward along the circumferential direction of the tube body, and the screw holder (1) An annular concave groove (12) is formed on the outer peripheral surface, and an annular convex portion (13) is formed on the inner peripheral surface. Since the inner diameter of the shaft holding cylinder portion (10) is formed so as to substantially coincide with the diameter of the shaft portion (20) of the driver (2), an annular convex portion formed with a smaller diameter ( The inner diameter of 13) is configured to be smaller than the diameter of the shaft portion (20), and only the pointed end portion of the engaging projection (21) at the tip of the shaft portion (20) can be inserted.

The driver (2) shown in the drawing is provided with a positive engagement protrusion (21), and the top surface of the head (40) of the screw (4) is cross-shaped with the engagement protrusion (21). A cruciform engagement groove (42) corresponding to the cusp is formed.
When the shaft part (20) of the driver (2) is inserted from the open end of the shaft holding cylinder part (10), the engagement protrusion (21) passes through the annular convex part (13), and its base end The part is caught by the annular convex part (13), and the further insertion of the shaft part (20) is prevented. That is, the annular convex portion (13) functions as an insertion preventing means for the shaft portion (20) of the driver (2). The tip of the engagement protrusion (21) of the driver (2) in a state where further insertion is prevented by the annular protrusion (13) is the engagement groove of the head (40) of the screw (4). The screw (4) is pushed in from the open end of the screw holding cylinder (11) so as to engage with (42). Since the screw holder (1) is entirely formed of transparent resin, the engagement state between the engagement protrusion (21) of the driver (2) and the engagement groove (42) of the screw (4) is It can be visually confirmed from the outside of the cylinder.

  The screw holder (1) is formed with the same thickness as a whole, but at the open end of the screw holding tube portion (11), the taper is increased in diameter toward the open end on the inner peripheral surface. A surface (14) is formed, and thus a thin portion (15) is formed. The head (40) of the screw (4) is densely stored in a position deeper than the tapered surface (14), and the screw shaft portion (41) of the screw (4) It becomes a mode which protrudes outward from the open end of (11).

  Using this screw holder (1), to attach the screw (4) to the screw mounting surface (5) that is located in a narrow place or in the back, first hold the screwdriver (2) and screw (4). In this state, hold the handle (not shown) of the screwdriver (2) toward the screw hole (50) formed in the screw mounting surface (5). Insert the screw shaft (41) of the screw (4) protruding from the open end of the screw holder (1) of the screw holder (1), and turn the screwdriver (2) in the tightening direction. .

  As the engagement shaft (41) of the screw (4) is screwed into the screw hole (50), the driver (2) advances in the tightening direction. When the portion (13) is pushed by the proximal end portion of the engagement protrusion (21) of the driver (2), the screw holder (1) is also moved in the same direction. Then, when the open end of the screw holding cylinder (11) reaches the screw mounting surface (5), further tightening the screwdriver (2), the thin part of the open end of the screw holding cylinder (11) ( 15) is deformed by being pushed by the screw mounting surface (5) as shown by a two-dot chain line in FIG. The screw (4) is tightened while the thin part (15) at the open end of the screw holding cylinder (11) is deformed until the taper surface (14) contacts the screw mounting surface (5). Completed state. After that, if the screwdriver (2) is pulled out, the screw holder (1) of the screwdriver (2) will also be pulled out of the screw (4) and only the screw (4) will be attached to the screw mounting surface (5). Become.

  Similarly, to remove the screw (4) that is attached to the screw mounting surface (5) that is located in a narrow place or deeply, using the screw holder (1), attach it to the tip of the screwdriver (2). The screwdriver (2) is inserted so that the open end of the screw holding cylinder (11) of the screw holder (1) fits over the head (40) of the screw (4). Since the taper surface (14) is formed at the open end of the screw holding cylinder (11), and the diameter is larger than the diameter of the head (40) of the screw (4), the screw holding cylinder ( It is not difficult work to make the head (40) of the screw (4) correspond to the open end of 11).

  When the head (40) of the screw (4) is stored in the open end in the screw holding cylinder (11), the open end of the screw holding cylinder (11) contacts the screw mounting surface (5). In this state, the tip of the driver (2) is positioned away from the top surface of the head (40) of the screw (4) by a predetermined distance. From this state, when the driver (2) is inserted deeply, the thin-walled portion (15) on the open end side of the screw holding tube portion (11) is, as described above, the engagement protrusion (21) of the driver (2). It is pushed and deformed between the base end and the screw mounting surface (5), and the tapered surface (14) corresponds to the screw mounting surface (5), and at the same time, the engagement protrusion (21) of the driver (2) The tip engages with the engagement groove (42) of the screw (4).

  In this state, remove the screw (4) by rotating the screwdriver (2) in the direction of removal, and remove it from the screw mounting surface (5). The removed screw (4) will be stored in the screw holding cylinder (11) of the screw holder (1) at a position deeper than the taper surface (14). By pulling out, the screw (4) is taken out in a state of being tightly held in the screw holding cylinder (11).

  In this way, by using the screw holder (1), it is possible to smoothly and surely attach and remove the screw to the narrow part or the recessed part, before attaching or after removing it. Since the screw (4) is in a state of being tightly fitted in the screw holding cylinder (11), there is no inconvenience that the screw (4) drops from the screw holder (1) during the work.

The screw holder (1) is bendable along the annular groove (12) formed on the outer peripheral surface, and the screw holder (1) corresponding to the formation area of the annular groove (12). Inside, the engagement protrusion (21) at the tip of the driver (2) is mounted so as to be positioned, and therefore the axis of the screw hole (50) formed in the screw mounting surface (5) When the screwing direction of the screwdriver (2) is deviated, as shown in FIG. 2, the screw holder ((2)) depends on the angle formed by the axis of the screw (4) and the shaft (20) of the screwdriver (2). 1) can be used by bending it with an annular groove (12). In this way, the screwdriver (2) can be used obliquely corresponding to the axis of the screw (4), so the axis of the screw (4) and the axis of the screwdriver (2) are not in a straight line. Even in such a case, the screw (4) can be easily attached and detached through the screw holder (1).
The screw holder (1) may be configured separately from the driver (2) or may be integrated by a dipping method.

Sectional drawing which shows the 1st use condition of the screw holder of embodiment of this invention. Sectional drawing which shows the 2nd use condition of the screw holder of embodiment of this invention. Sectional drawing which shows the use condition of the conventional screw holder.

Explanation of symbols

(1) ・ ・ ・ ・ ・ Screw holder
(10) ・ ・ ・ ・ ・ Shaft holding tube
(11) ・ ・ ・ ・ ・ Screw holding cylinder
(12) ・ ・ ・ ・ ・ Round recess
(13) ... Annular projection (insertion prevention means)
(2) ・ ・ ・ ・ ・ Driver
(20) ・ ・ ・ ・ ・ Shaft
(21) ・ ・ ・ ・ ・ engagement protrusion
(4) ・ ・ ・ ・ ・ Screw
(40) ・ ・ ・ ・ ・ Head
(42) ・ ・ ・ ・ ・ engagement groove

Claims (4)

In the screw holder that attaches to the tip of the driver and holds the head of the screw,
A cylindrical body made of an elastic member,
The cylinder is open to one end and the shaft of the driver can be inserted into a substantially tight fit, and the cylinder is open to the other end and the head of the screw can be stored and held in tight fit. It is composed of a screw holding cylinder part,
Insertion preventing means for preventing further insertion in a state where the shaft is inserted into the shaft holding cylinder part at a predetermined depth is provided,
When the shaft reaches the maximum insertion position, the engagement protrusion at the tip of the shaft is engaged with the engagement groove on the top surface of the screw head stored and held in the screw holding cylinder portion. Is set,
A screw holder, wherein an annular groove is formed along a circumferential direction on an outer peripheral surface of the cylinder corresponding to a boundary portion between the shaft holding cylinder and the screw holding cylinder.   The screw holder according to claim 1, wherein the insertion preventing means is an annular convex portion provided on an inner peripheral surface of the cylindrical body corresponding to a formation position of the annular concave groove, and an inner diameter of the annular convex portion is A screw holder characterized by being set smaller than the diameter of the shaft of the driver.   The screw holder according to claim 1 or 2, wherein each of the shaft holding cylinder part and the screw holding cylinder part is formed in a cylindrical shape, and on the inner peripheral surface of the open end of the screw holding cylinder part, A screw holder, wherein a taper-shaped portion whose diameter increases toward an open end is formed.   The screw holder according to any one of claims 1 to 3, wherein the cylindrical body is transparent.

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