JP7030167B1 - Wedge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wedge device capable of appropriately laterally pushing a heavy object when the heavy object is laterally pushed in a state where the lower edge portion of the heavy object is lifted from a mounting surface of the heavy object. SOLUTION: A thin bottom plate 3 fixed to a base 2 so that one end projects forward, an upper surface 41 inclined to descend toward the front, and positioning holes arranged in the front-rear direction provided on the inclined upper surface 41. A wedge body 4 slidably provided on the bottom plate having 42, a wedge body advancing / retreating mechanism 5 provided on a base 2 for pushing and pulling the wedge body 4 in the front-rear direction, and a wedge body advancing / retreating mechanism 5 protruding forward from the lower front portion of the main body 61. The wedge body 4 has a protrusion 62, an inclined lower surface 63 that can be slidably contacted with the upper surface 41 of the wedge body 4, and a pair of guide surfaces 64 formed along both side surfaces of the wedge body 4 on both sides of the inclined lower surface 63. It is provided with a slide body 6 to be placed on the slide body 6 and a stopper 7 for preventing the slide body 6 from retracting, which has a fitting portion 71 that is retractably fitted into the positioning hole 42. [Selection diagram] Fig. 1

Description

According to the present invention, when a heavy object placed on a mounting surface such as a floor is moved, the lower edge portion of the heavy object can be lifted from the mounting surface, and the lower edge portion of the heavy object is floated. It relates to a wedge device capable of pushing the heavy object sideways in the state.

Conventionally, in the wedge device as described above, a thin bottom plate fixed to the base so that one end projects forward and a tip portion thereof are arranged so as to overlap the upper side of one end portion of the bottom plate, and the tip portion thereof. A wedge body provided between a thin-walled inclined upper plate pivotally attached to the base so as to be able to swing in the vertical direction, and an upper surface inclined forward so as to be provided between the bottom plate and the inclined upper plate. And a wedge body advancing / retreating mechanism that pushes and pulls the wedge body in the front-rear direction (see Patent Document 1).

In this wedge device, the tip of the bottom plate and the inclined upper plate is inserted in the gap between the lower edge of the heavy object and the floor surface, and the wedge body is advanced by the wedge body advance / retreat mechanism to move the claws of other jacks and the like. Heavy objects can be lifted to a height that can be accommodated. At that time, as the wedge body advances, the inclined upper plate rises, and the heavy object rises together with the inclined upper plate.

In addition, this wedge device may be used to push a heavy object sideways, that is, to push a heavy object in a substantially horizontal direction. At that time, the inclined upper plate is swiveled rearward to retract from the upper side of the wedge body, the lower edge portion of the heavy object is directly placed on the upper surface of the tip portion of the wedge body, and then the wedge body is advanced by the pushing mechanism. , Pushes heavy objects forward with a wedge body.

Jikkenhei 4-94309 Gazette

However, when the above-mentioned conventional wedge device is used for lateral pushing of a heavy object, if the coefficient of friction between the upper surface of the wedge body and the lower edge portion of the heavy object is small, the upper surface of the wedge body and the lower edge portion of the heavy object are present. A slip occurs between the wedge body and the wedge body moves forward, and the heavy body rises, making it impossible to move the heavy object forward. Therefore, it is not possible to reliably push the heavy object sideways. Further, since the lower edge portion of the heavy object and the upper surface of the wedge body rub against each other, the upper surface of the wedge body or the lower edge portion of the heavy object is easily scratched. The scratches on the upper surface of the wedge body hinder the sliding between the inclined upper plate and the wedge body when a heavy object is lifted by using the inclined upper plate, which also shortens the life of the wedge device. In addition, scratches on the lower edge of heavy objects can cause the appearance to deteriorate.

The present invention has been made in view of such conventional problems. A main object of the present invention is a wedge capable of properly pushing the heavy object sideways when the heavy object is pushed sideways with the lower edge portion of the heavy object raised from the mounting surface of the heavy object. To provide the device.

Means for Solving Problems and Effects of Invention

According to the wedge device according to the first aspect of the present invention, a thin bottom plate fixed to the base so that one end projects forward, an upper surface inclined so as to descend forward, and the inclined upper surface. A wedge body slidably provided on the bottom plate having one or a plurality of positioning holes arranged in the front-rear direction, and a wedge body advance / retreat mechanism provided on the base for pushing and pulling the wedge body in the front-rear direction. A protruding portion protruding forward from the lower front surface of the main body, a lower inclined surface formed on the lower side of the main body and slidable on the inclined upper surface, and both sides of the lower inclined surface. Retreat of the slide body having a pair of guide surfaces formed along the side surface of the wedge body, a slide body mounted on the wedge body, and a fitting portion that can be pulled out and fitted into the positioning hole. It can be configured to include a stopper for blocking.

According to the above configuration, the lower edge portion of the heavy object is placed on the protruding portion of the slide body placed on the wedge body, and the lower edge portion is further lifted from the mounting surface, so that the slide body is further lifted by the load of the heavy object. The bottom plate is pressed against the mounting surface via the protrusion and the wedge body to generate a frictional force between the bottom plate and the mounting surface, and this frictional force receives the reaction generated when pushing a heavy object and fits. By preventing the slide body from retreating with respect to the wedge body by the stopper fitted in the positioning hole, the slide body can be advanced together with the wedge body, so that a heavy object can be properly pushed sideways.

According to the wedge device according to the second side surface of the present invention, an inclined portion that can cover the upper surface, a tip portion that can be overlapped with one end of the bottom plate, and both sides of the inclined portion in the width direction. When the gap between the lower edge portion of the heavy object and the above-mentioned mounting surface is smaller than the sum of the thickness of the bottom plate and the thickness of the protruding portion, the wedge body has a pair of reinforcing edges formed downward. Can be configured to include a thin-walled upper plate to be placed in place of the slide body.

With the above configuration, the upper plate and the slide body can be appropriately replaced and used according to the size of the gap between the lower edge portion of the heavy portion and the mounting surface, so that a heavy object can be lifted or the mounting surface can be used. It is possible to efficiently and properly perform the sideways pushing work of a heavy object whose lower edge is raised. In addition, the slide body and the upper plate can be easily replaced in a short time.

According to the wedge device according to the third aspect of the present invention, the slide body can be configured to have a stepped protrusion on the front surface of the main body.

With the above configuration, among the upper surfaces of the stepped protrusions that engage with the lower edge of the heavy object, the upper surface having a height as close as possible to the height from the mounting surface to the lower surface of the lower edge of the heavy object is selected. By supporting the lower surface of the lower edge of the heavy object with its upper surface, it is possible to start lifting the lower edge of the heavy object with the slide body placed as close to the tip of the wedge body as possible. It is possible to increase the amount of lifting of the lower edge of the heavy object and the amount of lateral pushing of the heavy object.

According to the wedge device according to the fourth aspect of the present invention, the upper surface of the protrusion can be configured to be inclined so as to become higher toward the front with respect to the above-mentioned mounting surface.

According to the above configuration, when the protrusion of the slide body is inserted under the lower edge of the heavy object and the wedge device is set, the corners of the front surface and the upper surface of the protrusion hit the lower surface of the lower edge of the heavy object, and the corners thereof. Since the slide body can reliably hold a heavy object, the wedge device is stable from the beginning, and the lower edge portion of the heavy object can be lifted or pushed sideways smoothly.

According to the wedge device according to the fifth aspect of the present invention, the wedge body is arranged in front of the base portion connected to the wedge body advancing / retreating mechanism and the front side of the base portion, and is fixed to the base portion by a bolt. It comprises a wedge portion having an upper surface inclined so as to descend toward, and the wedge portion can be configured to be one of a plurality of wedge portions having different inclination angles of the upper surface prepared in advance.

With the above configuration, a wedge portion having an appropriate inclination angle of the upper surface can be attached to the base according to the conditions of lifting or laterally pushing a heavy object, and the wedge portion can be attached to the base portion as compared with the case where the wedge bodies are exchanged with each other in the wedge device. It becomes possible to easily replace the members in a short time.

It is a front view of the wedge device which concerns on 1st Embodiment of this invention. It is a top view of the wedge device which concerns on 1st Embodiment of this invention. It is a right side view of the slide body shown in FIG. It is a front view of the upper plate. FIG. 4 is a cross-sectional view taken along the line AA of the cutting line shown in FIG. It is explanatory drawing of the method of lifting a heavy object by a wedge device. It is explanatory drawing of the method of lifting a heavy object by a wedge device. It is explanatory drawing of the method of lifting a heavy object by a wedge device. It is explanatory drawing of the lateral pushing method of a heavy object by a wedge device. It is explanatory drawing of the lateral pushing method of a heavy object by a wedge device. It is explanatory drawing of the lateral pushing method of a heavy object by a wedge device. It is explanatory drawing of the method of lifting a heavy object by the wedge device using the upper plate. It is a front view of the wedge device which concerns on 2nd Embodiment of this invention. It is a front view of the wedge device which concerns on 3rd Embodiment of this invention. It is a top view which shows an example of the wedge body of the wedge device which concerns on 4th Embodiment of this invention. FIG. 15 is a cross-sectional view taken along the line AA in FIG. It is sectional drawing which shows another example of the wedge body of the wedge device which concerns on 4th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments shown below exemplify wedge devices for embodying the technical idea of the present invention, and the present invention does not specify them to the following. Further, the present specification does not specify the members shown in the claims as the members of the embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the embodiments are not intended to limit the scope of the present invention to the specific description, but are merely described. It's just an example. The size and positional relationship of the members shown in each drawing may be exaggerated for the sake of clarity. Further, in the following description, members of the same or the same quality are shown with the same name and reference numeral, and detailed description thereof will be omitted as appropriate. Further, each element constituting the present invention may be configured such that a plurality of elements are composed of the same member and the plurality of elements are combined with one member, or conversely, the function of one member is performed by the plurality of members. It can also be shared and realized.
(First Embodiment)

In FIGS. 1 and 2, the wedge device 1 has a thin bottom plate 3 fixed to a base 2 so that one end projects forward, a wedge body 4 slidably provided on the bottom plate 3, and a wedge body 4. Is provided with a wedge body advancing / retreating mechanism 5 provided on the base 2, a slide body 6 mounted on the wedge body 4, and a stopper 7 for preventing the slide body 6 from retreating. There is.

The bottom plate 3 has a pair of reinforcing edges 31 fixed to the base 2 by bolts 32, and the wedge body 4 has an upper surface 41 inclined so as to descend forward and a front-rear direction provided on the inclined upper surface 41. It has a plurality of positioning holes 42 arranged in line with each other. The stopper 7 has a shaft-shaped fitting portion 71 that is removably fitted into the positioning hole 42 formed in the wedge body 4. In this embodiment, the inclination angle θ of the upper surface 41 of the wedge body 4 is about 11 degrees. Although the bottom surface of the bottom plate 3 shown in FIG. 1 is flat, in order to increase the coefficient of friction between the bottom plate 3 and the mounting surface F, a large number of irregularities are formed on the bottom surface of the bottom plate 3 and rubber having a grip force is formed. May be attached to the bottom of the bottom plate.

The slide body 6 has a protruding portion 62 protruding forward from the lower front surface of the main body 61, an inclined lower surface 63 provided on the lower side of the protruding portion 62 and the main body 61, which can be slidably contacted with the upper surface 41 of the wedge body 4. As shown in FIG. 3, facing guide surfaces 64 formed along both side surfaces of the wedge body 4 are provided on both sides of the inclined lower surface 63.

In this wedge device 1, as shown in FIG. 1, the gap g between the lower edge portion La of the heavy object L and the mounting surface F is larger than the sum (t0 + t1) of the thickness t0 of the bottom plate 3 and the thickness t1 of the protruding portion 62. When, the slide body 6 can be used.

In the case of this embodiment, the wedge device 1 further includes a thin-walled upper plate 8 to be placed on the wedge body 4 as shown by the alternate long and short dash line in FIGS. 1 and 2. In the upper plate 8, when the gap g between the lower edge portion La of the heavy object L and the mounting surface F is smaller than the sum (t0 + t1) of the thickness t0 of the bottom plate 3 and the thickness t1 of the protruding portion 62, that is, the gap g is small. When the slide body 6 cannot be inserted under the lower edge portion La of the heavy object L due to its small size, it is used in place of the slide body 6.

As shown in FIGS. 4 and 5, the upper plate 8 has an inclined portion 81 that can cover the upper surface 41 of the wedge body 4, a tip portion 82 that can be overlapped with one end of the bottom plate 3, and an inclined portion 81. It has a pair of reinforcing edges 83 formed downward on both sides in the width direction.
(How to lift heavy objects 1)

Next, a method of lifting the lower edge portion La of the heavy object L by using the wedge device 1 configured as described above will be described with reference to FIGS. 6 to 8.

In FIG. 6, the lower surface of the heavy object L is supported by a support base such as a block (not shown), and the lower edge portion La thereof is in a state of being lifted from the mounting surface F. The gap g between the lower edge portion La of the heavy object L and the mounting surface F is large enough to accommodate the protruding portion 62 of the slide body 6 in the gap g. Therefore, the slide body 6 is placed on the wedge body 4 in advance so that the inclined lower surface 63 and the upper surface 41 of the wedge body 4 are in sliding contact with each other as shown in the figure.

Next, the operator pushes the wedge device 1 along the mounting surface F, and inserts the protruding portion 62 of the slide body 6 between the lower edge portion La of the heavy object L and the mounting surface F. On the way, even if the front surface of the main body 61 of the slide body 6 comes into contact with the front surface of the lower edge portion La of the heavy object L as shown by the two-dot chain line, the wedge device 1 is further advanced in that state. Then, the slide body 6 rises, and as shown in FIG. 7, the upper surface of the protruding portion 62 of the slide body 6 hits the lower surface of the lower edge portion La of the heavy object L. In this state, the operator stops pushing the wedge device 1 and adjusts the posture of the wedge device 1 with respect to the lower edge portion La of the heavy object L.

Next, the wedge body advancing / retreating mechanism 5 is activated, and the wedge body 4 is pushed forward by the wedge body advancing / retreating mechanism 5. Then, the wedge body 4 slides forward on the bottom plate 3, the inclined lower surface 63 of the slide body 6 slides backward on the inclined upper surface 41 of the wedge body 4, and the slide body 6 is pushed up by the inclined upper surface 41 of the wedge body 4. The lower edge La of the heavy object L on the protrusion 62 also rises together with the protrusion 62. Then, as shown in FIG. 8, when the gap between the lower edge portion La of the heavy object L and the mounting surface F reaches the required size g1, the operation of the wedge body advancing / retreating mechanism 5 is stopped.
(How to push heavy objects sideways)

Next, a method of laterally pushing the heavy object L using the wedge device 1 will be described with reference to FIGS. 9 to 11. In this method, after the protruding portion 62 of the slide body 6 of the wedge device 1 is inserted between the lower edge portion La of the heavy object L and the mounting surface F, the upper surface of the slide body 6 is weighted as shown in FIG. Until it hits the lower surface of the lower edge portion La of the object L, the same process as the method of lifting the lower edge portion La of the heavy object L by using the wedge device 1 described above is performed.

When the wedge device 1 is set as shown in FIG. 9, as shown by a solid line in FIG. 10, the fitting portion 71 of the stopper 7 is fitted into the positioning hole 42 closest to the rear end of the main body 61 of the slide body 6. As a result, the stopper 7 is attached to the wedge body 4.

Next, the wedge body advancing / retreating mechanism 5 is activated, and the wedge body 4 is pushed forward by the wedge body advancing / retreating mechanism 5. Then, the wedge body 4 slides forward on the bottom plate 3, the inclined lower surface 63 of the slide body 6 slides backward on the upper surface 41 of the wedge body 4, and the slide body 6 is pushed up by the inclined lower upper surface 41 of the wedge body 4. As shown by the alternate long and short dash line, the lower edge La of the heavy object L rises until the front surface of the stopper 7 mounted on the wedge body 4 abuts on the rear end of the main body 61 of the slide body 6.

After the front surface of the stopper 7 comes into contact with the rear end of the main body 61 of the slide body 6, the slide body 6 advances together with the wedge body 4, and the front surface of the protruding portion 62 of the slide body 6 is the lower edge portion La of the heavy object L. The heavy object L is pushed forward and moves in contact with the front surface of the object L. Then, as shown in FIG. 11, when the heavy object L moves laterally to the required position, the operation of the wedge body advancing / retreating mechanism 5 is stopped.
(How to lift heavy objects 2)

Next, when the protrusion 62 of the slide body 6 cannot be inserted under the lower edge portion La of the heavy object L because the gap g between the lower edge portion La of the heavy object L and the mounting surface F is small. A method of lifting the lower edge portion La of the heavy object L by using this wedge device 1 will be described.

First, instead of the slide body 6, the upper plate 8 is placed on the wedge body 4 as shown in FIG. 12, and the wedge device 1 is advanced along the mounting surface F to advance the tip portion 82 of the upper plate 8. Is put into the gap g between the lower edge portion La of the heavy object L and the mounting surface F. Then, the wedge device 1 is further advanced, and when the lower edge portion La of the heavy object L hits the inclined portion 81 of the upper plate 8, the advance of the wedge device 1 is stopped.

Next, the wedge body advancing / retreating mechanism 5 is activated, and the wedge body 4 is pushed forward by the wedge body advancing / retreating mechanism 5. In this embodiment, the coefficient of friction between the lower surface of the inclined portion 81 of the upper plate 8 and the inclined upper surface 41 of the wedge body 4 is the friction between the lower edge portion La of the heavy object L and the upper surface of the inclined portion 81 of the upper plate 8. It is smaller than the coefficient, and when the wedge body 4 is pushed forward by the wedge body advancing / retreating mechanism 5, the wedge body 4 moves forward, and the lower surface of the inclined portion 81 of the upper plate 8 with the lower edge portion La of the heavy object L placed on it. Slides backward with respect to the wedge body 4 along the inclined upper surface 41 of the wedge body 4, and the lower edge portion La of the heavy object L rises. Then, when the gap g between the lower edge portion La of the heavy object L and the mounting surface F reaches a required size, the operation of the wedge body advancing / retreating mechanism 5 is stopped. In this state, a support base such as a block (not shown) is placed under the heavy object L, and the heavy object L is supported by this support, so that the height from the mounting surface F to the lower edge portion La of the heavy object L is reached. Hold the weight. Then, as shown in FIG. 1, the slide body 6 is placed on the wedge body 4 instead of the upper plate 8. In the case of this embodiment, the lower edge portion La of the heavy object L moves together with the upper plate 8, so that it is not easily scratched. The coefficient of friction between the lower surface of the inclined portion 81 of the upper plate 8 and the inclined upper surface 41 of the wedge body 4 is smaller than the friction coefficient between the lower edge portion La of the heavy object L and the upper surface of the inclined portion 81 of the upper plate 8. For example, oil can be applied between the lower surface of the inclined portion 81 of the upper plate 8 and the inclined upper surface 41 of the wedge body 4. Further, if necessary, the lower surface of the inclined portion 81 of the upper plate 8 and the inclined upper surface 41 of the wedge body 4 are obtained from the friction coefficient between the lower edge portion La of the heavy object L and the upper surface of the inclined portion 81 of the upper plate 8. The coefficient of friction of the upper plate 8 can be made larger, or the upper plate 8 can be restrained so as not to retract by pivoting the rear end portion of the upper plate 8 to the base 2 in advance as in the conventional case. In this case, as the wedge body 4 advances, the lower edge portion La of the heavy object L slides backward on the upper surface of the upper plate 8 and rises.

According to this embodiment, since the slide body 6 is mounted on the wedge body 4, it can be easily attached to and detached from the wedge body 4, and can be quickly and easily replaced with the upper plate 8. .. Further, when the wedge device 1 is pushed with the front surface of the main body 61 of the slide body 6 pressed against the front surface of the lower edge portion La of the heavy object L, the slide body 6 rises and the upper surface of the protruding portion 62 is the heavy object L. Since it abuts on the lower surface of the lower edge portion La, the wedge body advancing / retreating mechanism 5 can be started in that state, and there is a gap between the lower edge portion La of the heavy object L and the upper surface of the protruding portion 62. Compared to the case where the wedge body advancing / retreating mechanism 5 is started and the protruding portion 62 collides with the lower edge portion La of the heavy object L, the wedge device 1 is placed on the mounting surface F with respect to the lower edge portion La of the heavy object L. It can be properly positioned and installed. Further, since the front surface of the slide body 6 having a relatively large area can be pressed against the front surface of the lower edge portion La of the heavy object L to push the heavy object L, the lower edge portion La of the heavy object L can be pushed when the slide body 6 is pushed sideways. It is possible to prevent the front surface from being scratched.
(Second embodiment)

In FIG. 13, the inclination angle θ of the inclined upper surface 41 of the wedge body 4 is set to about 6.5 degrees, which is smaller than the inclination angle θ of the wedge body 4 of the first embodiment. Therefore, the force for pushing the wedge body 4 forward by the wedge body advancing / retreating mechanism 5 can be made smaller than that in the first embodiment. Further, the slide body 6 has a protruding portion 62 and a protruding portion 62a formed in a stepped shape on the front surface of the main body 61, and a wedge body advancing / retreating mechanism is provided according to the height of the lower surface of the lower edge portion La of the heavy object L. In order to shorten the advancing distance of the wedge body 4 by 5, the protruding portion 62 and the protruding portion 62a can be used properly.
(Third embodiment)

In FIG. 14, the angle δ formed by the inclined lower surface 63 of the slide body 6 and the plane parallel to the upper surface of the protrusion 62 is larger than the inclination angle θ of the inclined upper surface 41 of the wedge body 4. Therefore, when the slide body 6 is placed on the wedge body 4, the upper surface of the protrusion 62 is not parallel to the upper surface of the bottom plate 3, and is tilted so as to become higher toward the front. Then, the corner of the upper tip of the protruding portion 62 makes line contact with the substantially horizontal lower surface of the lower edge portion La of the heavy object L. In this embodiment, δ is about 16 degrees and θ is about 11 degrees. When the heavy object is made of steel such as a machine tool and the lower surface is less likely to be damaged, or when there is no problem even if the lower surface is slightly scratched, the upper corner of the tip of the protrusion 62 is the heavy object L and the protrusion 62. It becomes non-slip.
(Fourth Embodiment)

FIG. 15 shows an example of the wedge body 4 of the wedge device according to the fourth embodiment of the present invention, and the wedge body 4 has a base portion 45 connected to a piston rod 52 of the wedge body advancing / retreating mechanism 5 and the base portion 45. It consists of a wedge portion 47 having an upper surface inclined to descend forward, which is arranged on the front side of the above and is fixed to the base 45 by a bolt 46. As shown in FIGS. 16 and 17, two wedge members 47 and 49 having different inclination angles with respect to the bottom surface 48 of the upper surface 41 are prepared in advance in this wedge device. Then, the wedge portion 47 and the wedge portion 49 may be replaced and mounted on the front side of the base 45 according to conditions such as the weight of the heavy object when lifting or pushing the heavy object and the frictional state with the mounting surface. can. In this embodiment, the inclination angle of the upper surface 41 of the wedge portion 47 is about 11 degrees, and the inclination angle of the wedge portion 49 is about 6.5 degrees, but if necessary, the inclination angle of the upper surface of the wedge portion is set to another angle. However, three or more wedge portions having different inclination angles of the upper surface may be prepared.

1 ... Wedge device 2 ... Base 3 ... Bottom plate; 31 ... Reinforcing edge 4 ... Wedge body; 41 ... Top surface; 42 ... Positioning hole; 43 ... Side surface; 45 ... Base; 46 ... Bolt;
47 ... Cuneus; 48 ... Hole; 49 ... Cuneus 5 ... Wedge body advancing / retreating mechanism; 51 ... Cylinder; 52 ... Piston rod; 53 ... Joint 6 ... Slide body; 61 ... Main body part; 62 ... Protruding part; 63 ... Inclined Bottom surface; 64 ... Guide surface 7 ... Stopper; 71 ... Fitting part 8 ... Upper plate; 81 ... Inclined part; 82 ... Tip part; 83 ... Reinforcing edge F ... Mounting surface L ... Heavy object; La ... Under heavy object Edge θ: Inclination angle of the inclined upper surface of the wedge body δ: Angle formed by the inclined lower surface and the plane parallel to the upper surface of the protruding portion.

Claims (4)

A wedge device that is used by placing it on the above-mentioned mounting surface when moving a heavy object placed on the mounting surface.
A thin bottom plate that is fixed to the base so that one end projects forward, and the bottom surface is in contact with the above-mentioned mounting surface during use .
A wedge body slidably provided on the bottom plate having an upper surface inclined to descend forward, and a plurality of positioning holes provided on the inclined upper surface and arranged in one or more front-rear directions.
A wedge body advancing / retreating mechanism provided on the base, which pushes and pulls the wedge body in the front-rear direction,
A protruding portion that protrudes forward from the lower part of the front surface of the main body and is inclined so that the upper surface becomes higher toward the front with respect to the above-mentioned mounting surface, the protruding portion, and the inclined portion formed on the lower side of the main body. A slide body mounted on the wedge body having a lower inclined surface that can be slidably contacted with the upper surface and a pair of guide surfaces formed along the side surfaces of the wedge body on both sides of the lower inclined surface. ,
A wedge device including a fitting portion that is retractably fitted into the positioning hole and a stopper for preventing the slide body from retracting. The wedge device according to claim 1, further
The heavy object has an inclined portion that can cover the upper surface, a tip portion that can be overlapped with one end of the bottom plate, and a pair of downward reinforcing edges formed on both sides of the inclined portion in the width direction. When the gap between the lower edge portion and the above-mentioned mounting surface is smaller than the sum of the thickness of the bottom plate and the thickness of the protruding portion, a wedge provided with a thin-walled upper plate to be placed on the wedge body instead of the slide body. Device. The wedge device according to claim 1 or 2.
The slide body is a wedge device having a protrusion formed in a stepped shape on the front surface of the main body. A thin bottom plate fixed to the base so that one end projects forward,
A wedge body slidably provided on the bottom plate having an upper surface inclined to descend forward, and a plurality of positioning holes provided on the inclined upper surface and arranged in one or more front-rear directions.
A wedge body advancing / retreating mechanism provided on the base, which pushes and pulls the wedge body in the front-rear direction,
A protrusion protruding forward from the lower front surface of the main body, a lower inclined surface formed on the lower side of the main body and slidable to the inclined upper surface, and the above on both sides of the lower inclined surface. A slide body to be placed on the wedge body having a pair of guide surfaces formed along the side surface of the wedge body, and a slide body to be placed on the wedge body.
It is provided with a stopper for preventing the slide body from retracting, which has a fitting portion that can be pulled out and fitted into the positioning hole.
The cuneus is composed of a base connected to the wedge advancing / retreating mechanism and a wedge portion having an upper surface inclined toward the front, which is arranged on the front side of the base and is fixed to the base by a bolt. The wedge portion is a wedge device prepared in advance, which is one of a plurality of wedge portions having different inclination angles of the upper surfaces thereof.

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