JP7027660B1 - Cam type jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the above-mentioned problem by inventing a jack which does not require a space for tool work that can be used in a narrow space, does not have a jack for a large load, and therefore can generate force only by wrist work of one hand. .. SOLUTION: In this idea, in order to make a mechanism in which an internal gear directly bears the phase displacement of a jack and the operation can be performed only by a screw, a U-shaped base member f and a base member f are attached to the base member. A pair of cover members a and b that cover the shaft member g, a plurality of cam members e that are rotatable and alternately supported by the shaft member, and the cam member and the base member from both sides. A shaft member c that can open and close the cam member side of the cover member, and a cover groove portion j that is formed on the inner side surface of each of the cover members and engages with the cam groove portion formed on the cam surface of the cam member. An attempt is made to solve the problem with a cam-type jack characterized by -1 and a rotation operating device member d in which either the base member or the shaft member is rotatably supported and the other is screw-coupled. It is something to do. [Selection diagram] Fig. 1

Description

The present invention relates to a small jack tool.

Conventionally, when widening the member spacing, when it is lightweight, etc., it is adjusted by hitting with a set of wedges, or when it is heavy, a manual jack or hydraulic jack is used, but the jack space and jack are operated. It required a work space with both hands and tools that required large movements.

Task

Since there is no jack for large loads that can be used in a narrow space, we have devised a jack that can generate force with just one hand's wrist work, and are trying to eliminate the above-mentioned problems.

Solution

In this idea, in order to make the mechanism that the internal gear directly bears the phase displacement of the jack and the operation is possible only by the rotation of the screw, for example, the U-shaped base member f in FIG. 1 and the base member A pair of cover members a and b that cover the attached shaft member g, a plurality of cam members e that are rotatable and alternately supported by the shaft member, and the cam member and the base member from both sides. And a shaft member c that can open and close the cam member side of the cover member, and a cover groove portion that is formed on the inner side surface of each of the cover member and engages with the cam groove portion formed on the cam surface of the cam member. The form as shown in FIG. 2 or the above as shown in FIGS. 3 and 6 is composed of j-1 and a rotation operating device member d rotatably supported by the base member and screwed to the shaft member. A cam-type jack characterized by being screwed to a base member and rotatably supported by the shaft member is intended to solve the problem.

In this proposal, a small and powerful jack that can be operated with one hand is focused on the magnitude of the force due to the rotation of the cam shape, and by simply rotating the screw, the base member of FIG. 1 f and FIG. 7 v can be slid. We have invented a cam-type jack that allows the cam to rotate by engaging with the inside of the cover member of a and b in FIG. 1 and r and t in FIG.

An example is a jack in which a pair of cover members opened and closed by one shaft member of FIG. 1 has a crocodile shape, in which a pair of cover members a and b on both sides are crocodile via a shaft member. The structure is assembled so as to be movable, and the inner surfaces of the cover members a and b have an engageable groove shape such as a tooth profile, and the rotation operating member d is attached to the shaft member c in FIG. 2. The base member f engaged with the tip is slid and moved inside the cover by being screw-engaged as described above and being rotated. Here, in the example of FIG. 2, the base member f that slides and moves by screw rotation engages with the rotating member, and has a fastener h so that the screw of the rotation operating member does not come off from the base member by pushing and pulling. Represents. The base member f is a two-point support U-shape as shown in FIGS. 1 to 3 that supports the camshaft member g, or a three-point support Y-shape as shown in FIG. 7 in which two two-point supports are connected. The cam-shaped gear j-2 as shown in FIG. 4 attached to the shaft member engages with the tooth profile j-1 inside the cover and rotates. Since the radius dimension of the outer circumference is gradually increased, the cam-shaped gear slides and rotates, so that the cover member ab is expanded in the direction perpendicular to the slide direction. Therefore, we propose a structure in which the distance between the pair of cover members a and b is widened.

The invention's effect

Generally, a rotary plate-shaped cam is used to operate a movable body in which the outer circumference of the cam slips and touches due to the rotational force transmitted from the shaft. In this case, the outer circumference of the cam has a tooth-shaped groove shape. Therefore, the idea is to utilize the fact that the dimension of the outer circumference of the cam from the shaft changes by rolling without slipping while engaging with the shape of the inner groove of the cover covering the cam.
And by stacking them in different directions alternately, one shaft can rotate the cam in two directions, and one slide amount by screw rotation operation covers more of the rotation of the cam in two directions. It is possible to surely obtain the displacement of the push-up amount.
In the case of the crocodile-type cam-type jack shown in FIGS. 1 and 6, the jack stroke according to the rotation of the bolt can be changed by changing the place where the cam inside the crocodile jack rolls to increase the displacement of the tip opening of the crocodile. You can change it. For example, in order to make the jack work for a light load, the rolling position of the cam is moved closer to the shaft member c of the crocodile jack, so that the opening can be made quickly or greatly with a small number of screw rotations. In addition, if the cam part that rotates by the sliding mechanism of the screw is used as the force point, the cam rolls in the direction away from the fulcrum according to the theory of leverage, so it can be said that the force efficiency is good because it is closer to the point of action than the fulcrum. ..

Is a perspective view of a crocodile type jack of a cam type jack. a and b are a pair of cover members, c is a shaft member for moving the pair of a and b cover members in a crocodile, and d is a U-shaped base member connected to the tip. E is a cam member of a rotary plate-shaped flat cam-shaped gear, f is a U-shaped base member that supports a shaft that supports the cam, and g is a shaft that alternately overlaps and penetrates the direction of the cam. j-1 is a groove-shaped portion that engages with the cam gear. Is an internal base member and a screw-shaped rotating shaft with a seat in FIG. 1, and h is an example of a retaining metal fitting for the rotating shaft when viewed from the direction of arrow. Is an example of a base member in which the thickness of the cam is reduced and changed to the female screw part of i. Is an example of the shape of a rotary plate-shaped flat cam with a tooth profile on the outer circumference, and the shaded area on the outer peripheral half circumference is the tooth profile groove of j-2. This is an example in which the radius of curvature gradually increases from R1 to R3, and the core of the shaft hole of k is eccentric. Is an example when using the cam in Fig. 1. It is a diagram of the foundation o, the foundation m, the pillar l and its surroundings. Is an application example of a crocodile type jack. This is a Y-shaped base member z when two U-shaped base members are combined into one body, and it is also used as the base member shape v by engaging and penetrating the screw (not shown) as shown in Fig. 7. .. Is an example in which two sets of the camshaft s and the base member v are connected to one rotation operation screw x, and y is an example in which a hexagonal length nut and a fastening nut are used as auxiliary materials during the rotation operation.

By rotating the screw of the rotation operation part, the base member inside the cover is slid, which also moves the camshaft, so the cam itself is rotated by the engagement between the outer circumference of the cam and the inside of the cover. The distance between the pair of covers is varied along the shapes of the various cams.

Examples of the present invention will be described with reference to the drawings.
As an example, it is a jack in which a pair of cover members opened and closed by one shaft member of c in FIG. 1 has a crocodile shape. This is a structure assembled so that a pair of cover members a and b on both sides can move like a crocodile via a shaft member c, and the inner surface of the cover members a and b has an engageable groove shape like a tooth profile. The rotation operation member d is screw-engaged with the shaft member c as shown in FIG. 2, and the base member f engaged with the tip by the rotation operation thereof is inside the cover. Slide to move with.

Here, in the example of FIG. 2, the base member f that slides and moves by screw rotation engages with the rotating member, and has a fastener h so that the screw of the rotation operating member does not come off from the base member by pushing and pulling. Represents. The base member f is a two-point support U-shape as shown in FIGS. 1 to 3 that supports the camshaft member g, or a three-point support Y-shape as shown in FIG. 6 in which two two-point supports are connected. The cam-shaped gear j-2, which has a groove shape on the outer circumference as shown in FIG. 4 attached to the shaft member, engages with the tooth profile j-1 inside the cover and rotates. ing.

Fig. 5 as an application is an example of using the crocodile cam type jack of Fig. 1. This is a diagram of the foundation o of a wooden house and the area around the foundation m and pillar l, but in an old house, the foundation may sink to the ground due to the unbalanced load of the house for many years and tilt due to the difference in the amount. In this case, a part of the concrete foundation is cut out under the floor only in the space where the jack can be inserted, without dismantling and removing a part of the floor to secure a work space for installing the jack n, for example, one piece per pillar. It is a tool that can be expected to stably lift the base depending on the degree of the rotation operation part d in Fig. 1, even though the cam jack is installed and the floor tilting area is corrected little by little as a whole. p is the state when the cam inside the jack slides open when the base moves a little.

Further, FIG. 7 is a jack in which the phase is changed in parallel by the same principle. In an example in which two sets of a camshaft and a base member are connected to one rotation operation screw x, the moved member q is parallel to the support u. This is an example of cover members r and t when lifting at a right angle.
The content is that a right-handed screw and a left-handed screw are formed into one screw, and one of the female screws of the base member having different screw directions engages and penetrates, and the base member of s and v is in the direction. Is installed so as to be reversed.

Here, FIG. 7 is omitted because there are various methods for fixing the screws in the sliding direction. y is an example of using a hexagonal length nut and a fastening nut as auxiliary materials at the time of rotation operation.

Claims (1)

A U-shaped base member, a shaft member attached to the base member, a plurality of cam members that are rotatable and alternately supported by the shaft member, and both sides of the cam member and the base member. A pair of cover members that cover the cam member, a shaft member that can open and close the cam member side of the cover member, and a cam groove portion formed on the inner side surface of each of the cover member and formed on the cam surface of the cam member. A cam-type jack characterized in that one is rotatably supported by the base member and the shaft member, and the other is a rotation operation member that is screw-engaged.

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