JP3199648U - Oil filter wrench - Google Patents

Abstract

An oil filter wrench that can be used for oil filters of various sizes and has an improved tightening force on the oil filter. An oil filter wrench has an elongated gripping body, a screw shaft inserted into a guide groove formed in a longitudinal direction of the gripping body, and an operation provided outside a rear end portion of the screw shaft. And a slider 43 formed at the base end of the tightening portion, which forms a tightening portion 41 that protrudes and protrudes forward from the arm portion 11 provided at the front end portion of the gripping body and winds and tightens the outer peripheral surface of the oil filter. And a tightening belt body 40 provided on the screw shaft. By rotating the operation portion, the tightening portion can be expanded and contracted, and the tightening belt body can be fixed to or removed from the outer peripheral surface of the oil filter. [Selection] Figure 3

Description

  The present invention relates to an oil filter wrench that attaches and detaches an oil filter that keeps engine oil that lubricates the inside of an engine of an automobile or the like clean.

  In an internal combustion engine such as an engine used in an automobile or the like, in general, engine oil is circulated inside the engine in order to lubricate a movable sliding portion. This engine oil is included in lubrication. In order to remove impurities and circulate again, an oil filter is provided in the middle of the circulation path. This oil filter generally has a paper filter built in a cylindrical filter case, and the oil filter is mounted on the engine by screwing one end of the filter case into a screw provided on the outer shell of the engine. At the same time, the inside of the oil filter is incorporated into the oil circulation path of the engine.

  Since engine oil deteriorates with use, all used engine oil is extracted and replaced with new engine oil at an appropriate timing. At that time, since the oil filter is also clogged due to the accumulation of the trapped impurities with use, the oil filter is also replaced with a new one once every one to several times of engine oil replacement.

  When installing a new oil filter to the engine, it can be easily installed by manually screwing a cylindrical or regular polygonal oil filter onto the screw provided on the engine. It adheres and cannot be easily removed, and oil or dirt adheres to the exterior of the oil filter with use, making it easy to slip. For this reason, when removing a used oil filter, the used oil filter cannot be removed by turning it in the direction of removal with only the power of a human hand.

  Also, in recent automobiles, there are a lot of auxiliary equipment other than the engine body for exhaust gas regulation and addition of comfort functions, and the space in the engine room is narrow due to the presence of these auxiliary equipment. Even when trying to remove the oil filter by hand, it was only possible for the hand to enter, and when removing the oil filter, it was difficult for the arm to enter and it was difficult to remove.

  Therefore, dedicated jigs (so-called oil filter wrench) using various methods for removing the used oil filter or attaching a new one by rotating the oil filter are used. For example, the oil filter is cylindrical, but its outer peripheral surface is usually polygonal, and a jig with a shape that engages with this polygon is fitted, and the oil filter is attached and detached using the jig. There is an oil filter wrench to do.

  For example, as shown in Japanese Patent Laid-Open No. 9-225848 (referred to as Patent Document 1), the inner peripheral surface of the upright peripheral wall 3a of the dish-shaped tool body 3 has a shape corresponding to the tip 21a of the oil filter 21. The plate-shaped tool body 3 has a projecting portion 2 for fitting the driving tool 10 at the center thereof, and the oil filter 21 meshed with the upright peripheral wall 3a is rotated by rotating the driving tool 10. As shown in Japanese Utility Model Registration No. 3066829 (Patent Document 2), a retaining pattern is formed on the inner peripheral surface of the fitting main body 1, and this retaining pattern is formed on the oil filter 6 as shown in FIG. There are various types such as a rotating one fitted in the polygonal replacement pattern 61.

  In addition, without being fitted into the polygonal shape portion of the outer end portion of the oil filter, a string-like or band-like wound material is strongly wound around the cylindrical oil filter outer peripheral portion and fixed so as to be integrated with the oil filter, There is also one that rotates in that state and removes the oil filter. For example, as shown in Japanese Utility Model Laid-Open No. 5-80666 (Patent Document 3), several curved tightening arm bodies 1 are pivotally attached to form a ring body 2, and the ring body 2 is used for oil. There is also a chain wrench that tightens and rotates a filter and a system that wraps a metal chain (see, for example, Japanese Patent No. 2969215 (Patent Document 4)).

  In addition, a band holder is provided on the winding body having wrench insertion holes at both ends, the base end of the tightening band that is wound around the outer peripheral surface of the oil filter is fastened to the band holder, and the other end is wound up. An oil filter wrench that is locked to the body is also known (see, for example, Japanese Patent Application Laid-Open No. 7-52058 (Patent Document 5)).

JP-A-9-225848 Utility Model Registration No. 3066829 Japanese Utility Model Publication No. 5-80666 Japanese Patent No. 2969215 Japanese Unexamined Patent Publication No. 7-52058

  By the way, oil filters have different capacities and sizes depending on the manufacturer and model of the engine used, and there are various external dimensions and shapes. Therefore, there are various types of polygonal shapes on the outer peripheral surface of the oil filter. In many cases, the oil filter wrench of Patent Document 1 or Patent Document 2 requires a dedicated member to be fitted to each oil filter, and there is a problem that the cost becomes high to cope with other types of oil filters. .

  Patent Document 3 has two types of diameters depending on the locking position of the fastening arm 1 to both ends of the window hole 4 provided in the oil filter wrench, regardless of the polygonal shape of the outer peripheral surface of the oil filter. Although it can be applied to an oil filter, there is a problem that it cannot be used for oil filters having diameters other than the two types.

  The chain wrench of Patent Document 4 can be used for oil filters of various diameters because the length of the chain wound around the oil filter can be adjusted. However, since the oil filter is wound outside the cylindrical surface with no irregularities, only the irregularities on the chain surface prevent slipping to the oil filter surface. There was a problem that the oil filter could not be turned well.

  The belt used by tightening the belt of Patent Document 5 can be adjusted according to the outer diameter of the oil filter, is versatile, and is attached to the surface of the oil filter due to the viscosity of the band. However, in this case as well, the band strongly adheres and it is necessary to tighten it tightly.Rubber and leather may deteriorate with age in comparison with metal, and may be torn off during work. There was a problem that if the band was damaged while being held by hand, it could lead to an unexpected accident.

  Furthermore, due to oil and dirt adhering to the surface of the oil filter, slipping occurs simply by tightening the outer peripheral surface of the cylindrical oil filter with a belt-like long object as in Patent Documents 3 to 5 above. There was a problem that the oil filter could not be easily attached and detached.

  This device solves the above-mentioned problems and has versatility that can be used for various oil filters. It can also be relatively easily wound around an oil filter and fastened. Another object of the present invention is to provide an oil filter wrench that does not cause any problems.

In order to solve the above-described object, the oil filter wrench according to the first aspect of the present invention has a substantially Y-shaped arm portion at the front end portion, and the inside of the arm portion in the longitudinal direction from the front end portion to the rear end portion. An elongated gripping body comprising a pair of upper and lower divided bodies having guide grooves;
An operation part provided outside the rear end of the screw shaft rotatably fitted in the guide groove of the gripping body;
The belt main body formed continuously with the base end of the tightening portion is inserted into the guide groove formed in the arm portion of the gripping body and has a tightening portion for winding and tightening the outer peripheral surface of the oil filter. A fastening belt body provided on the screw shaft,
By rotating the operation portion, the tightening portion of the tightening belt body is expanded and contracted, and the tightening portion of the tightening belt body is fastened and fixed to the outer peripheral surface of the oil filter. It is characterized by.

  According to a second aspect of the present invention, in the oil filter wrench according to the first aspect, a protrusion is formed on the outer surface of the arm portion of the gripping body that contacts the oil filter inside the opening of the guide groove. It is characterized by being.

  According to the oil filter wrench of the first aspect of the present invention, the elongated gripping body, the screw shaft inserted in the guide groove formed in the longitudinal direction inside the gripping body, the outer end of the rear end portion of the screw shaft An operation part provided so as to be freely rotatable, a tightening part that is projected and retracted forward from an arm part provided at the front end part of the gripping body to wind and tighten the outer peripheral surface of the oil filter, and a base end of the tightening part A continuously formed slider comprises a tightening belt body provided on the screw shaft, and by rotating the operation portion, the tightening portion of the tightening belt body is expanded and contracted, and the tightening belt body is The outer circumferential surface (envelope circle) formed by the tightening portion of the tightening belt body by rotating the operation portion is characterized by being configured to be fastened and fixed to the outer peripheral surface of the oil filter. Can be adjusted arbitrarily, so various dimensions It can be used in the oil filter. In addition, the outer peripheral surface of the oil filter is sandwiched between the front outer peripheral surface and the tightening portion of the gripping body, and is fastened and fixed, so that it is fixed more firmly than a conventional belt and tightened to the surface of the oil filter wrench. It is possible to prevent the belt from slipping and being unable to rotate due to the oil or dirt.

  In addition, as described above, the tightening portion of the tightening member can be tightened or loosened to the outer peripheral surface of the oil filter simply by gripping the gripping body by hand and rotating the operation portion. Easy to install or remove.

  Furthermore, each component part of a holding body, a screw shaft, an operation part, and a fastening belt body is a thing of simple structure, and also the assembly operation | work of these parts is also easy.

According to the oil filter wrench of the second aspect, since the protrusion is formed on the outer surface of the arm portion of the gripping body that contacts the oil filter inside the opening of the guide groove, Due to the reduction of the tightening part, the protrusion bites into the outer peripheral surface of the oil filter, and the pulling force that reduces the tightening part acts to press the oil filter toward the protrusion part. It is supported at two points by the inward force from the two points of the pulling force from the opposite side, and it is possible to prevent the tightening portion from slipping and becoming unable to rotate due to oil or dirt adhering to the outer peripheral surface of the oil filter wrench.
The shape and position of the protrusions formed on the arms are not particularly limited in the present invention, but a pair of protrusions are provided at spaced apart symmetrical positions formed on the front surface of the arms as shown in the example drawings. In this case, the oil filter is supported at three points by the force from the two protrusions and the three points of the pulling force from the opposite side of the tightening part, and the tightening force is further improved than in the case of the two-point support. Furthermore, slippage can be prevented.

It is a perspective view which shows the use condition which used the oil filter wrench of this invention for the oil filter. It is a perspective view showing the whole oil filter wrench of this device. It is a front sectional view of the oil filter wrench of this device. (A) and (B) both show the use state of the oil filter wrench of the present invention, (A) is a front sectional view when the tightening portion of the tightening belt body is expanded, and (B) is the tightening portion. It is front sectional drawing at the time of reducing. It is an enlarged front view which shows the other example of a projection part.

An embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 is a perspective view showing a use state of an oil filter wrench according to an embodiment of the present invention as an oil filter, FIG. 2 is a perspective view showing the entire oil filter wrench, and FIG. 3 is a front view of the oil filter wrench. It is principal part sectional drawing.

  The oil filter wrench 1 according to the present invention is roughly divided into a rectangular holding section 10 having a rectangular cross section, and a screw that is rotatably fitted in a guide groove 13 formed in the longitudinal direction of the holding body 10. A tightening portion 41 for winding and tightening the outer peripheral surface of the oil filter 50 inserted through the operation portion 30 provided outside the rear end portion of the shaft 20 and the guide groove 13a formed in the arm portion 11 of the gripping body 10. And a tightening belt body 40 provided on the screw shaft 20 with a belt main body 42 formed continuously at the base end of the tightening portion 41.

  The gripping body 10 is a combination of a pair of upper and lower divided bodies 10A and 10B, and the upper divided body 10A and the lower divided body 10B are symmetrical as shown in FIGS. Is formed. Strictly speaking, only the diameters of the screw holes for screwing both 10A and 10B are different. Therefore, since the illustration of the upper divided body 10A is omitted in this embodiment, the drawing of the lower divided body 10B may be referred to.

Then, substantially Y-shaped arm portions 11 and 11 are formed at the front end portions of the gripping body 10, that is, the upper divided body 10 </ b> A and the lower divided body 10 </ b> B. As described above, the shape is substantially Y-shaped with an obtuse angle of less than 180 °.
Between the obtuse angle of the substantially Y shape, a concave portion 11a that forms a curved surface of a partially circular arc surface of a cylinder is formed, and is formed into a curved surface having a diameter slightly larger than the maximum outer diameter of the oil filter 50 to be used. Has been.

  Further, a bulging portion 12 that bulges in the left-right direction is formed at the rear end portion of the gripping body 10, similarly to the arm portions 11, 11 at the front end portion.

  Furthermore, a guide groove 13 is formed in the longitudinal direction from the front end portion to the rear end portion of the arm portions 11, 11 of the gripping body 10. That is, the guide groove 13 is formed in a groove shape having a square cross section along the length direction at the inner center of the gripping body 10, and the guide groove 13 is formed inside the left and right arm portions 11, 11. The guide grooves 13a and 13a communicate with two guide grooves 13a and 13a that run in an oblique direction, respectively, and the guide grooves 13a and 13a are slit-like openings on the surface of the recess 11a near the front ends of the arm parts 11 and 11, respectively. It communicates with the parts 13b and 13b.

  Further, a pair of left and right protrusions 14 and 14 serving as ridges are formed on the outer surface of the arm parts 11 and 11 of the gripping body 10 that are in contact with the oil filter 50 inside the guide grooves 13a and 13a. Is formed.

  The threaded shaft 20 employs a triple thread having three spiral grooves, but is not particularly limited, and may be a single thread, a double thread, or a four thread. However, the greater the number of strips, there is an advantage that the movement distance of the slider 43 described later with respect to the rotation of the operation unit 30 can be increased.

  The operating portion 30 is integrally provided at the rear end portion of the screw shaft 20, and a disc-shaped stopper 21 is provided near the rear end of the screw shaft. 10B is stored in the storage recesses 12a and 12b. The stopper 21 restricts the movement of the screw shaft 20 in the front-rear direction in the vicinity of the rear end of the guide groove 13 to rotate at a fixed position, and the operation unit 30 is united by being rotated by a human hand. The screw shaft 20 can rotate in the left and right directions in the guide groove 13.

  The tightening belt body 40 is a belt made of a thin metal plate such as stainless steel, and both ends of the tightening belt body 40 are welded to the slider 43 and engraved inside the slider 43. A female screw 43 a is screwed to the male screw 22 of the screw shaft 20. Therefore, the slider 43 moves forward and backward in the guide grooves 13 and 13a as the screw shaft 20 rotates.

  An example of the case where the tightening belt body 40 is assembled to the grip body 10 including the upper and lower divided bodies 10A and 10B will be described below.

  As described above, the operation portion 30 and the stopper 21 fixed to the rear end portion, the slider 43 screwed so as to be vertically movable above the stopper 21, and the base end portion of the belt main body portion 42 are fixed to the slider 43. A screw shaft 20 provided with a tightening belt body 40 is prepared.

  Next, the stopper 21 is fitted into the storage recess 12b of the lower divided body 10B of the gripping body 10, and the slider 43 and the belt main body 42 are fitted into the guide groove 13 in the longitudinal direction, and the ring-shaped Part of the lower part of the front end portion of the tightening belt body 40 serving as the tightening portion 41 is fitted into the left and right guide grooves 13 a and 13 a formed in the arm portions 11 and 11. As a result, front surfaces of the front ends of the arm portions 11 and 11 (arc-shaped concave portions 11a) formed on the inner side of the opening portions 13b and 13b of the guide grooves 13a and 13a of the left and right arm portions 11 and 11, and the opening portions. A substantially circular (ring-shaped) tightening portion 41 is formed by the inner peripheral wall surface of the arc surface 44 extending in an arc surface shape forward from 13b and 13b.

  Finally, the stopper 21 is fitted into the storage concave portion 12a formed on the back surface side of the bulging portion 12 of the upper divided body 10A of the gripping body 10, and the slider 43 and the belt main body 42 are the same as in the above [0036]. Are fitted in the guide groove 13 and a part of the front end portion of the tightening belt body 40 is fitted in the left and right guide grooves 13a, 13a formed in the arm portions 11, 11. As a result, a substantially arc-shaped (ring-shaped) tightening portion 41 is formed in the same manner as in the above [0036].

  The lower divided body 10B and the upper divided body 10A of the gripping body 10 are superposed, and screws 17 are screwed into the screw holes 15 of the lower divided body 10B and the screw holes 16 of the upper divided body 10A. To do.

  Since the oil filter wrench 1 of the present invention is configured as described above, when the operation unit 30 is rotated, the slider 43 moves forward and backward along the screw shaft 20 as the screw shaft 20 rotates. By forward / reverse rotation of the portion 30, the slider 43 moves back and forth within the guide groove 13, and accordingly, the belt main body portion 42 also moves back and forth. As a result, the front end portion of the tightening belt body 40 fitted in the guide grooves 13a and 13a formed in the arm portions 11 and 11 of the gripping body 10 has an arcuate surface shape formed between the openings 13b and 13b. The tightening portion 41 is formed in a ring shape with the concave portion 11a, and the size of the tightening portion 41 is the length of movement of the slider 43 and the tightening belt body 40 by the operation of the operation portion 30. It is adjusted by.

  That is, in other words, by rotating the operation portion 30, the tightening portion 41 of the tightening belt body 40 is expanded and contracted, and the tightening portion 41 of the tightening belt body 40 is placed on the outer peripheral surface of the oil filter 50. It is configured to be fastened or removable.

  Next, how to use the oil filter wrench of the present invention will be described below with reference to FIGS. 4 (A) and 4 (B). First, as shown in FIG. 4 (A), the tightening portion 41 of the tightening belt body 40 of the oil filter wrench 1 is wound and hung on the outer peripheral side of the used oil filter 50 (indicated by a dotted line) to be removed.

  At that time, the long gripping body 10 is gripped by the hand, but the oil filter wrench slips from the hand due to the presence of the arms 11 and 11 on the front end side and the bulging parts 12 and 12 on the rear end side. To prevent.

  If the size of the tightening portion 41 of the tightening belt body 40 is smaller than the outer diameter of the oil filter 50, the operating portion 30 is rotated forward in the direction in which the tightening portion 41 expands and expands. The tightening portion 41 is enlarged to such an extent that it winds around the oil filter 50 (see FIG. 4A).

  In the above state (FIG. 4 (A)), the tightening portion 41 is wound around the outer peripheral surface of the oil filter 50, and the operation portion 30 is reversely rotated in the direction in which the tightening portion 41 contracts and tightens to reduce the tightening portion 41. Then, the tightening portion 41 is brought into close contact with the outer surface of the oil filter 50 and tightened (see FIG. 4B).

  At this time, even after the tightening portion 41 is wound around the outer peripheral surface of the oil filter 50, if the operation portion 30 is rotated in the direction in which the tightening portion 41 is contracted, the oil filter 50 is connected to the concave portion 11a of the gripping body 10 and the tightening belt. The pair of protrusions 14 and 14 formed in the recess 11 a of the arm portion 11 are tightened by the tightening portion 41 of the body 40 and bite into the outer peripheral surface of the oil filter 50, so that the oil filter wrench 1 is moved to the oil filter 50. It is firmly fixed to.

  That is, in the state of being firmly tightened and fixed, the two protrusions 14 and 14 are biting into the oil filter 50, and a tensile force is applied to reduce the tightening portion 41 of the tightening belt body 40 from the opening 13b. The force that presses the oil filter 50 toward the protrusions 14 and 14 works, and the oil filter 50 has three points including the two points of the protrusions 14 and 14 and the pulling force from the side opposite to the concave portion 11a of the tightening part 41. It is firmly supported by the force toward the inner side, and is stably held by this three-point support. Therefore, the tightening belt body 40 does not slide or come off the surface of the oil filter 50 to which oil or dirt adheres as the oil filter wrench 1 rotates.

  Note that the present invention is not limited to the shape and structure shown in the above-described embodiment, and can be implemented by appropriately changing each part within a range in which the object of the present invention can be exhibited.

  For example, the inner concave portion 11a that is substantially Y-shaped by the two arm portions 11 and 11 forms a curved surface having a cylindrical inner shape, but does not necessarily have to be a curved surface shape of the cylinder, and has two obtuse angles. It is good also as the recessed part 11a enclosed by the flat plate. In short, it is only necessary that the maximum and minimum diameters of the oil filter 50 to be used fit into the recess 11a and the protrusions 14 and 14 bite into the outer surface of the oil filter 50.

  Further, the protrusions 14 and 14 are not limited to the protrusion shape as shown in the above embodiment, and for example, one or a plurality of rod-shaped minute protrusions may be provided at two predetermined positions. it can. Alternatively, it may be formed with uneven warts.

  Further, in addition to providing a projecting convex portion on the surface of the concave portion 11a to form the projecting portion 14, as shown in FIG. 5, the oil filter having the maximum diameter among the oil filters 50 to be used is 50L, the minimum Assuming that the oil filter having a diameter of 50S is 50S, the concave portion 11a is a curved surface R1 having a diameter larger than the diameter of the oil filter 50L, and the central portion is a curved surface R2 having a diameter smaller than the diameter of the oil filter 50S. The boundary between R2 and R2 is in point (line) contact with both the oil filter 50L and 50S, and the boundary between the curved surfaces R1 and R2 can be the protrusion 14.

  In the above-described embodiment, the operation unit 30 is formed by forming a knurl on the cylindrical outer peripheral surface and rotating by gripping the knurl portion. However, instead of this, a knob (not shown) that grips with a finger toward the outside is provided on a part of the disk, or a wing nut projects integrally with the rear end of the screw shaft 20. What was provided can also be employ | adopted and the shape and structure of the operation part 30 can be changed suitably.

DESCRIPTION OF SYMBOLS 1 Oil filter wrench 10 Grasping body 10A Upper division body 10B Lower division body 11 Arm part 11a Recessed part 12 Bulging part 13 Guide groove 13a Guide groove (of arm part)
13b Opening portion 14 Protrusion portion 20 Screw shaft 21 Stopper 30 Operation portion 40 Tightening belt body 41 Tightening portion 42 Belt main body portion 43 Slider 50 Oil filter

Claims (2)

An elongated Y-shaped gripping body comprising a pair of upper and lower divided bodies having a substantially Y-shaped arm at the front end and a guide groove in the longitudinal direction from the front end to the rear end of the arm;
An operation part provided outside the rear end of the screw shaft rotatably fitted in the guide groove of the gripping body;
The belt main body formed continuously with the base end of the tightening portion is inserted into the guide groove formed in the arm portion of the gripping body and has a tightening portion for winding and tightening the outer peripheral surface of the oil filter. A fastening belt body provided on the screw shaft,
By rotating the operation portion, the tightening portion of the tightening belt body is expanded and contracted, and the tightening portion of the tightening belt body is fastened and fixed to the outer peripheral surface of the oil filter. Oil filter wrench characterized by   2. The oil filter wrench according to claim 1, wherein a protrusion is formed on an outer surface of the arm portion of the gripping body that contacts the oil filter inside the opening of the guide groove.

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