JPS5920942Y2 - drum base wrench - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a drum cap wrench used for attaching and detaching a cap that is screwed into an opening in the top plate of a drum that constitutes a container for non-corrosive liquids such as petroleum.

For example, when a large amount of petroleum is transported by ordinary truck or stored indoors or outdoors, a drum made of steel or the like is used as the container, and the oil is transported through an opening in the top of the drum. As oil is taken in and taken out, the inside of the drum is ventilated as necessary through the opening, and the opening is normally closed by screwing the cap.

However, petroleum is flammable, and if the cap opens unnecessarily due to mischief by outsiders such as children, or due to contact with objects near the drum, there is a risk of fire. It has been devised so that it does not turn into
Specifically, a specially shaped fitting recess is formed on the surface of the cap, making it difficult to hook or turn the cap with a general tool. The gold can be rotated.

In addition, special wrenches are made of non-ignitable material to prevent sparks from occurring even if the wrench accidentally hits the drum wall during handling. Standardized by name.

By the way, as shown in FIGS. 1 to 4, the shape of a base wrench that conforms to the standards used in the past is such that a handle 1 made of a straight round bar has different shaped mouths at both ends. The parts 2 and 3 are pivoted and fixed to a swingable body with a nut 4, and various fitting molds corresponding to a plurality of types of mouth shapes are protrudingly molded around each mouth part 2 and 3. Specifically, two fitting molds 2a and 2b are formed in one mouth portion 2, and four fitting molds 3a to 3d are formed in the other mouth portion 3.

As shown in FIG. 5, in order to use this wrench to rotate the cap C of the drum D using, for example, one fitting die 2a, the fitting die 2a is pushed downward into the recess of the cap C. If the handle 1a is then turned by hand, the side end surface of the fitting mold 2a will hit the two protrusions 5 on the inner circumference of the cap C.
Easily tighten or loosen the cap C and attach the top plate 6 of the drum D.
It can be attached and detached from the opening.

However, during this operation, as shown in FIG. 6, which is an enlarged view of the operation part in FIG.
°, the gripping fingers pass very close to the top plate 6, and there is a slight height A (approximately 20 m
m) Since there is no L, it is not only difficult to operate, but there is also a high risk of getting your fingers stuck between the drum D and the collar 6a, causing injury. If they are lined up side by side, the above-mentioned danger accompanies most of the rotation range of the handle 1, and when the operator handles the wrench while riding on the drum, the operator must bend over and use the wrench in an unreasonable position. work must be done.

Furthermore, with the conventional cap wrench that selects and uses a plurality of fitting parts, it is necessary to select an appropriate fitting part each time it is used for drum caps with different shapes as shown in A-E in Figure 9. In particular, selective mating work in a dimly lit warehouse was extremely troublesome.

As described above, conventional base wrenches have the disadvantage of lacking in operability and operational safety in many cases.

The present invention was devised to solve the above-mentioned difficulties, and the purpose of the present invention is to create a single unit that is excellent in operability and safety, and that can be widely applied to drum caps of various shapes in one operation. An object of the present invention is to provide a drum base wrench having a fitting part.

Hereinafter, the present invention will be explained based on an illustrated embodiment.

As shown in FIGS. 7 and 8, the base wrench of the embodiment has a mouth portion 7, a round bar-shaped vertical rod portion 8 that stands up about 8 cm behind the turning portion 7, and a vertical rod portion 8 of the vertical rod portion 8. It is integrally formed with a round bar-shaped handle 9 extending horizontally in a straight line from the upper end, and the total length of the handle 9 is about 70% of the length of the conventional handle. be.

Therefore, the shape of the mouth part 7 is such that four engaging legs 7a having a rectangular cross section are provided, which extend from the lower end of the vertical rod part 8 in all directions and hang down, and each leg 7a has an outer circumferential dimension. The angle is such that it touches the inner periphery of the concave portion of the cap C.

To turn the cap C using the cap wrench of the embodiment configured as described above, grasp the handle 9 with both hands, push the engaging leg 7a into the recess of the cap C, and then turn the wrench in the desired direction. Since the gripping hand is sufficiently raised above the top of the drum, there is no risk of injury if the hand slips, and operation is extremely safe.

In addition, in the structure of the above-mentioned embodiment, since the mouth part 7 is held by the handle part 9 in a dual-supported manner, no operating force other than rotation is applied to the mouth part 7, and therefore the fitting of the mouth part 7 is prevented. Since the engagement is stable and there is no risk of it coming off from the cap C, and the fitting type of the mouth portion 7 is formed by four engaging legs 7a, each fitting of various types of caps known in the past is possible. There is an advantage that the mouth portion 7 can be reliably and stably fitted to various types of caps in common with most fitting shapes.

For example, according to the wrench of the above embodiment, FIGS.
The engaging leg 7a of the mouth portion 7 is fitted into any of the shapes of the cap C, and the cap can be opened by rotating the cap in the direction of arrow a.

Furthermore, when opening and closing the cap of a drum that is placed alone on a large floor, a conventional cantilever wrench may be more convenient for an experienced person, so there is no need to worry about safety. In some cases, it is best to use a conventional wrench as well.

As described above, according to the drum base wrench of the present invention, since the wrench is constructed by providing a vertical rod between the wrench mouth and the handle, the wrench handle can be gripped when opening and closing the base. Make sure your hands are well away from the drum top so that
It has the effect of improving the operability and safety of the base wrench.

Further, according to the drum base wrench according to the present invention, the mouth portion is formed by four engaging legs having a rectangular cross section and extending from the lower end of the vertical rod portion in all directions and hanging down. Each drum base of the type shown in A-E in Fig. 9,
It can be opened and closed by the single opening, which not only greatly simplifies the structure compared to the conventional drum wrench, but also improves the workability of opening and closing.

[Brief explanation of drawings]

Fig. 1 is a plan view of a conventional base wrench, Fig. 2 is a front view of the same, Fig. 3 is a left side view of the same, Fig. 4 is a right side view of the same,
Figure 5 is a plan view of the wrench with the same base during operation, and Figure 6 is:
The enlarged sectional view taken along the VI-VI line in FIG. 5 and FIG. 7 are as follows:
FIG. 8 is a front view of a drum base wrench showing an embodiment of the present invention, FIG. 8 is a bottom view thereof, and FIGS. 9A to 9E are diagrams showing the fitting states of various bases and the wrench. C: Countryside, D: Drum, 6...
...Top plate, 7...Mouth, 8...Vertical rod, 9...Handle.

Claims (1)

[Scope of utility model registration request] It is formed by a mouth portion that fits into the mouthpiece of the drum, a vertical rod portion rising approximately right-angled above the back surface of the mouth portion, and a handle portion extending horizontally from the upper end of the vertical rod portion. A drum base wrench characterized in that it is formed by four engaging legs with a square cross section that extend from the lower end of a vertical rod part and hang down.