JPH10151575A - Wrench for thumbscrew - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fasten back a thumbscrew easily, without a bias of force and with strong force. SOLUTION: This wrench for a thumbscrew is constituted by providing a cylindrical thumbscrew socket 2 on one end of a handle 1 sideways and a plural pairs of engagement grooves 9 with which a butterfly head part of the thumbscrew or a pair of thumbscrew pieces of a butterfly nut is engaged by making two of the engagement grooves 9 arranged symmetrically against the center of the socket 2 as one set on an inner peripheral surface of this thumbscrew socket 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a thumb screw (in the present invention, it refers to both a screw having a butterfly head and a wing nut having a pair of knobs, and the former is separated from this generic name. (Referred to as a thumb screw).

[0002]

2. Description of the Related Art Heretofore, there has been no particular tool for retightening a thumbscrew, but a pliers or pliers have been used either directly by hand or when a large tightening force is required.

[0003]

However, in the case of manual operation, the tightening force is insufficient, and the operator tends to win, and the labor burden on the operator is large.

In addition, when pliers are used, it is difficult to rotate the thumb screw and the wing nut at the same time by sandwiching both the head and the wing nut, and the operation is troublesome and the work efficiency is poor. In addition, there has been a problem that one of the head and the knob piece is damaged due to the bias of the force.

SUMMARY OF THE INVENTION The present invention provides a wrench for a thumbscrew in which a thumbscrew can be easily and securely tightened without any bias.

[0006]

According to the first aspect of the present invention, a cylindrical thumbscrew socket is provided at one end of a handle in a lateral direction, and the thumbscrew head or the thumbscrew of the thumbscrew is provided on the inner peripheral surface of the thumbscrew socket. One or a plurality of engagement grooves, which are symmetrically arranged with respect to the center of the socket, are provided as a set of two engagement grooves with which a pair of knob pieces of the wing nut can be engaged.

According to a second aspect of the present invention, in the configuration of the first aspect, a socket mounting hole is provided at one end of the handle, a thumbscrew socket is rotatably inserted into the socket mounting hole, and an end of the handle is provided at one end of the handle. A ratchet mechanism is provided on the outer peripheral portion of the mounting hole to transmit the rotational operation force of the handle to the thumbscrew socket in one direction only by the engagement between the pawl gear and the pawl.

According to a third aspect of the present invention, in the configuration of the second aspect, the pawl of the ratchet mechanism is provided with two locking concave portions that selectively mesh with teeth of the ratchet wheel, and the pawl is parallel to the thumb screw socket. It is mounted so as to be swingable about a central shaft, and one of the locking recesses is selected by swinging of the pawl to switch the rotational force transmission direction.

According to a fourth aspect of the present invention, there is provided the polygon screw socket according to any one of the first to third aspects, wherein a head of a polygon bolt or a polygon nut is screwed back to one end of the handle opposite to the thumb screw socket. Is provided.

According to a fifth aspect of the present invention, in the configuration of the fourth aspect, the polygonal screw socket is provided integrally with the socket for the thumb screw in a coaxial arrangement.

According to a sixth aspect of the present invention, in the configuration of the first to fifth aspects, a spanner portion is provided at the other end of the handle to sandwich the facing surface of the polygonal bolt head or the polygonal nut.

According to the above construction, the butterfly-shaped head or a pair of tabs of the thumb screw is engaged with the pair of engagement grooves in the thumb screw socket, and the rotational force applied to the socket from the handle is applied to both heads. , Is evenly applied to the knobs.

Thus, the thumb screw can be easily retightened with a strong force without bias.

In this case, according to the second aspect of the present invention, the one-way rotational force transmitting action of the ratchet mechanism (one-way sliding action).
Thus, a continuous operation can be performed. According to the configuration of the third aspect, a switching operation of the rotational force transmitting direction is further applied, so that both the tightening and returning operations can be performed continuously.

According to the fourth and fifth aspects of the present invention, it can be used for both a thumb screw and a polygonal screw. According to the sixth aspect of the present invention, the wrench further includes a wrench having a fixed opening width and a variable width monkey. It can be used as a multi-function tool.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

The wrench for a thumbscrew according to this embodiment is:
At one end of the handle 1, a thumb screw socket 2 is provided on one side, and a polygon screw socket 3 for polygon bolts or nuts is provided on the other side, and a spanner 4 for polygon bolts or nuts is provided on the other end. Made up.

The thumb screw socket 2 and the polygon screw socket 3 are integrally formed coaxially as shown in FIG. 3 to form a stepped cylindrical shape as a whole. Is rotatably inserted into a socket mounting hole 5 provided in the hole.

In FIG. 3, reference numeral 6 denotes a retaining ring for fixing the socket in the axial direction mounted on the outer periphery on the base end side of the polygonal screw socket 3.

In the hollow portion of the thumbscrew socket 2, the tip half 2a has a pair of knob pieces 8, 8 of a thumbscrew 7 (for example, a wing nut is shown in FIG. 5 and described below in this example). The large-diameter portion having a diameter that can be fitted and the remaining half 2b are small-diameter portions that prevent the knob pieces 8, 8 from entering.

Large diameter portion 2a of this thumbscrew socket 2
On the inner peripheral surface, there are provided a plurality of pairs (six in the example in the figure) of two engagement grooves 9 with which the knob pieces 8 can be engaged, which are symmetrically arranged with respect to the center of the socket.

The engaging grooves 9 are formed by projecting, at equal intervals in the circumferential direction, projections 10 having the same number of triangular cross sections as the grooves 9 on the inner peripheral surface of the socket.

On the other hand, on the inner peripheral surface of the polygonal screw socket 3,
A large number of engaging grooves 11 are provided in the circumferential direction so as to be compatible with a plurality of types of polygonal screws (square, hexagonal, octagonal screws).

A ratchet wheel 12 is integrally provided on the outer peripheral surface of the boundary between the thumb screw socket 2 and the polygonal screw socket 3, and a pawl 13 meshing with the ratchet wheel 12 is provided on the outer peripheral side of the socket mounting hole 5. A spring 15 for pressing the pawl 13 toward the ratchet wheel via the ball 14 is provided, and a ratchet mechanism 16 is provided.
Is configured.

By the ratchet mechanism 16, the rotational operation force applied to the handle 1 is transmitted to the sockets 2 and 3 only in one direction (only the handle 1 rotates by sliding in the opposite direction).
Therefore, continuous operation of tightening or returning can be performed.

The pawl 13 is, as shown in FIG.
Two locking recesses 13a, 13 meshing with the two teeth 12a.
b and the pawl 13 is connected to an axis 17 parallel to the sockets 2 and 3.
Is pivoted between two positions indicated by a solid line and an imaginary line in FIG. 4 so that one of the locking recesses 13a and 13b is selected and the rotational force transmitting direction is switched. Thereby, continuous operation of both tightening and reversing becomes possible.

The wrench 4 is provided with an opening 4a, and a head of a polygon bolt having a predetermined size or a polygon nut is formed in the opening 4a.
And is rotated.

When tightening the wing nut 7 with this wrench, the ratchet mechanism 16 is used as shown in FIG.
With the claw 13 set in one position suitable for tightening and returning, use a well-known box wrench to
As in the case of operating the nut, the thumb screw socket 2 is put on the wing nut 7 in a state where the engagement grooves 9, 9 and the tab pieces 8, 8 are fitted to each other. I just need. In FIG. 5, reference numeral 18 denotes a bolt into which the wing nut 7 is screwed.

This allows the wing nut 7 to be
The nut can be easily tightened in the same manner as the operation of the nut, and by applying an even force to both knob pieces 8,8.

The polygon screw socket 3 is provided on the opposite side of the thumb screw socket 2, and the spanner 4 is provided at the other end so as to share the handle 1, so that it can be used as a multifunctional tool. .

The wrench can be used for a wing screw having a wing head in the same manner as the wing nut 7 described above.

Other Embodiments (1) In the above embodiment, two sets of engagement grooves 9 are provided on the inner peripheral surface of the thumbscrew socket 2 so as to easily cope with various directions of the knob pieces 8, 8. Are provided, but of course, only one set of the engagement groove 9 may be provided.

(2) In the above-described embodiment, the spanner 4 having a fixed opening width is provided at the other end of the handle 1. Alternatively, a monkey spanner having a variable opening width may be provided.

(3) The way of combining the thumbscrew socket 2 with other tools is not limited to the above-described embodiment, but can be variously selected.

Alternatively, instead of the multifunctional type as in the above embodiment, a wrench dedicated to a thumb screw may be used.

[0036]

As described above, according to the present invention, a cylindrical thumbscrew socket is provided laterally at one end of a handle, and the thumb screw head or wing nut of the thumbscrew is provided on the inner peripheral surface of the thumbscrew socket. The thumbscrew wrench is formed by providing one or a plurality of sets of engagement grooves with which the pair of knobs can be engaged, so that the thumbscrew can be easily tightened back without bias and with a strong force. .

Therefore, the work of retightening the thumb screw can be performed quickly, efficiently, and smoothly without causing damage to the knob and the head.

In this case, according to the second aspect of the present invention, continuous operation can be performed by the one-way rotational force transmitting action of the ratchet mechanism. According to the third aspect of the present invention, the torque transmitting direction switching action is added to tighten.・ Continuous operation of both return is possible.

According to the fourth and fifth aspects of the present invention, the wrench can be used for both a thumb screw and a polygon bolt / nut. According to the sixth aspect of the present invention, the wrench is further provided as a wrench (having a fixed or variable opening width). Function can be added and it can be used as a multifunctional tool.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wrench for a thumbscrew according to an embodiment of the present invention.

FIG. 2 is a front view of the wrench.

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

FIG. 4 is a partially enlarged view for explaining the configuration and operation of a ratchet mechanism provided in the wrench.

FIG. 5 is a partial cross-sectional side view for explaining how to use the wrench.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Handle 2 Thumb screw socket 9 Thumb screw socket engaging groove 3 Polygon screw socket 4 Wrench part 5 Socket mounting hole 7 Thumb screw (Wing nut) 8, 8 A pair of knob pieces 16 Ratchet mechanism 12 Ratchet mechanism constituting ratchet mechanism 13 Claws 13a, 13b Swing central axes of locking claw provided at two places of claw for switching sliding direction 14 Ball constituting ratchet mechanism 15 Spring

Claims (6)

[Claims] 1. A cylindrical thumbscrew socket is provided laterally at one end of a handle, and a pair of knobs of a thumbhead or a wingnut of a thumbscrew engages an inner peripheral surface of the thumbscrew socket. A wrench for a thumbscrew, characterized in that one or a plurality of engagement grooves are provided as a set of two symmetrically arranged with respect to the center of the socket. 2. The wrench for a thumbscrew according to claim 1, wherein one end of the handle is provided with a socket mounting hole, the thumbscrew socket is rotatably inserted into the socket mounting hole, and the one end of the handle is provided with the socket. A wrench for a thumbscrew, wherein a ratchet mechanism is provided at an outer peripheral portion of the mounting hole to transmit the rotational operation force of the handle to the thumbscrew socket only in one direction by a meshing action of the claw gear and the claw. 3. A pawl of a ratchet mechanism is provided with two locking recesses selectively meshing with teeth of a ratchet wheel, and the pawl is swingably mounted around an axis parallel to the thumbscrew socket, 3. The wrench for a thumbscrew according to claim 2, wherein one of the locking recesses is selected by the swing of the claw, and the rotational force transmitting direction is switched. 4. A polygon screw socket for reversing a head of a polygon bolt or a polygon nut at an end of a handle opposite to the thumb screw socket is provided. Wrench for thumbscrew described in 4. 5. The polygon screw socket is provided integrally with the thumb screw socket in a coaxial arrangement.
The wrench for the described thumbscrew. 6. The wrench for a thumbscrew according to claim 1, wherein a wrench for sandwiching the face of the polygonal bolt head or the polygonal nut is provided at the other end of the handle.