JPH028694Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Use The present invention relates to a box type spanner, and particularly to one used for tightening a round nut having a knurl cut on the outer periphery of its head.

BACKGROUND ART Conventionally, the work of tightening or loosening a seed round nut has been performed using tools such as pliers or radio pliers.

Problems to be solved by the invention As mentioned above, when working with tools such as pliers or radio pliers, the knurling on the head of the round nut may be scraped off and damaged, and the equipment to which the round nut is attached may be damaged. The tools often caused damage to the surfaces of other objects.

The present invention was devised in view of these problems, and aims to provide a device that does not damage the head of a round nut or the surface of equipment.

Means for Solving the Problems In order to achieve the above object, the present invention has a main body with a concave portion at the tip, and a ring hole with an engaging portion formed on the inner periphery to engage with the head of a round nut. and an auxiliary member having a protrusion that fits into a ring hole of the crown body to limit the depth of the ring hole. The crowned body is removably fitted and fixed together with the auxiliary member located deep inside the recess.

Function Select the crowning body and auxiliary member so that the depth of the ring hole in the crowning body is shallower than the thickness of the head of the round nut, assemble the box type wrench, and place it over the head of the round nut. When the round nut enters the ring hole to a certain depth, the head of the round nut abuts against the protrusion of the auxiliary member and stops. Therefore, when tightening the round nut, a suitable gap will remain between the tip and the surface of the device, etc.

Embodiments Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view showing the main parts longitudinally, FIG. 2 is a bottom view, FIG. 3 is an exploded view, and FIG. 4 is a side view showing the state of use.

The box type wrench of this embodiment is constructed by assembling a main body 1, a crowned body 2, and an auxiliary member 3 in a manner that allows them to be disassembled.

Each part will be explained in detail below.

As shown in FIGS. 1 and 3, the rod-shaped main body 1 is provided with a recess 6 located on the axis of the main body 1 and having a circular planar shape at the tip 5 on the opposite side of the grip 4. A screw hole 7 penetrating from the outer peripheral surface of the distal end portion 5 into the recess 6 is bored. Note that a bolt 8 with a socket is screwed into this screw hole 7.

The crowned body 2, which is fitted into the recess 6 and removably fixed to the tip 5, has a substantially ring-shaped planar shape, and the inner periphery of the ring hole 9 inside the crowned body 2 is fitted with a round nut to be tightened. The engaging portion 11 is formed by forming the engaging portion 11 so as to match the outer circumferential shape of the engaging portion 10 . Specifically, since a large number of knurls 12 are cut in the longitudinal direction on the outer periphery of the head of the round nut 10, the engaging portion 11 is also formed to mesh with the knurling shape. In order to fix the crowned body 2 to the tip 5 of the main body 1, the bolt 8 with a hole is screwed into the screw hole 7, and the tip of the bolt 8 with a hole is engraved on the outer periphery of the body 2. It is then locked in the locking groove 13 that has been formed.

The auxiliary member 3 that fits into the recess 6 of the distal end 5 of the main body 1 at the inner part of the crowned body 2 has a bottom part 14 having an outer diameter that can be fitted into the recess 6, and a bottom part 14 that has an outer diameter that can be fitted into the recess 6, and It has an outer diameter that can fit into the ring hole 9 of the body 2,
In addition, a ring-shaped protrusion 15 having an appropriate thickness to reduce the depth of the ring hole 9 is integrally formed.

In order to accommodate various types of round nuts, the crowned body and the auxiliary member are designed to match the outer circumference of the head of the corresponding round nut, and the auxiliary member is designed to match the outer circumference of the head of the corresponding round nut. A large number of types are prepared, with the height of the protrusion corresponding to the thickness of the head.

To assemble the box type wrench with the main body 1, crowned body 2, and auxiliary member 3, first, attach the crowned body 2 and the auxiliary member 3, and insert the protrusion 15 of the auxiliary member 3 into the ring hole 9 of the crowned body 2. The integrated body is inserted into the recess 6 of the tip 5 of the main body 1, and the eaves part 1
4 is positioned deep inside and fitted, and finally, a socket bolt 8 is screwed into the screw hole 7 to fix the crowned body 2 to the tip 5 of the main body 1.

When tightening the round nut 10 using the box type wrench of this embodiment assembled in this way, the depth of the ring hole 9 is shallower than the thickness of the head of the round nut 10, as shown in FIG. Therefore, when the head of the round nut 10 is placed over the ring hole 9, when the head of the round nut 10 enters the ring hole 9 to a certain depth, the tip of the head of the round nut 10 hits the protrusion 15 of the auxiliary member 3. It hits and stops. Therefore, when tightening the round nut 10, the tip 5 and the surface 19 of the device etc.
There will be a suitable gap between the two.

Effects The present invention includes a main body having a recessed portion at its tip, and a ring hole in which an engaging portion for engaging with the head of a round nut is formed on the inner periphery of the main body. A crowned body detachably fixed to the main body, a protrusion that fits into a ring hole of the crowned body and limits the depth of the ring hole, and is attached to the crowned body, and an auxiliary member inserted to be positioned deep in the recess of the main body, the main body, the crowned body, and the auxiliary member can be easily disassembled and assembled, and can be used with many types of round nuts. can correspond to In addition, when tightening a round nut, the engaging part matches the outer circumference of the head of the round nut, so there is no need to scrape off the head of the round nut, and the crowning body and auxiliary member can be selected appropriately. do,
Since the depth of the ring hole in the crowned body can be configured to be shallower than the thickness of the head of the round nut to be tightened, there is no space between the tip of the body and the surface of the device to which the round nut is attached. This creates a gap and has the effect of preventing the tip from scratching and damaging the surface of the equipment, etc.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view taken in longitudinal section of the main part, FIG. 2 is a bottom view, FIG. 3 is an exploded view, and FIG. 4 is a side view showing the state of use. 1... Main body, 2... Covered body, 3... Auxiliary member,
5... Tip, 6... Recess, 9... Ring hole, 1
1... Engaging portion, 15... Protrusion.

Claims (1)

[Scope of utility model registration request] The main body has a concave portion at the tip, and a ring hole with an engaging portion formed on the inner periphery to engage with the head of a round nut, and is removably fixed to the main body by fitting into the concave portion of the main body. a crowned body, and a protrusion that fits into a ring hole of the crowned body and limits the depth of the ring hole; A box type wrench consisting of an auxiliary member inserted to be positioned in the section.