JP2018040213A - Auxiliary leg connection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To couple an upper part of an auxiliary leg with a strut of a ground standing body in a vertical relative movement-stopped state.SOLUTION: An auxiliary leg connection device comprises: a main fitting member 6 which is fixed to an upper part of an auxiliary leg 2 and fitted to one side face of a strut 3; a movable fitting member 7 which moves closer to the main fitting member to be fitted to the side face of the strut; and a fastener 8 which fastens the movable fitting member to the main fitting member. The main fitting member has a holding part 9 provided with the fastener 8, a fixed part 10 fixed to the upper part of the auxiliary leg 2, and a fitting part 11 fitted to the one side face of the strut. The movable fitting member has, in one body, a holding part 9 which faces the holding part 9 of the main fitting member and moves closer with the fastener 8, and a fitting part 11 which faces the fitting part 11 of the main fitting member and is fitted to the opposite face of the strut. On a free end side of at least one of the fitting part 11 of the main fitting member and the fitting part 11 of the movable fitting member, an engagement part 12 is provided which engages a stave 4 of a ground standing body 5 to restrict a vertical relative movement.SELECTED DRAWING: Figure 9

Description

  The present invention relates to an auxiliary leg connecting device for attaching an auxiliary leg to a pillar of a location body such as a ladder, a stepladder, a work table, and a tripod.

2. Description of the Related Art Conventionally, a technique for attaching an auxiliary leg to a pillar of a location body has been developed in order to assist a pillar of a location body such as a ladder, a stepladder, a work table, or a tripod.
For example, the auxiliary leg of Patent Document 1 is configured to be attachable to a stepladder or ladder formed by arranging a pair of struts on both sides in the width direction, and the stepping leg or the ladder is opened by an auxiliary leg that opens outward in the width direction of the stepladder or ladder. In the stepladder or ladder overturn prevention device designed to assist the ladder, the upper end side of the auxiliary leg is connected, and the mounting member is formed so that it can be mounted on any column, and the column on which the mounting member is mounted before and after the stepladder or ladder A first abutting member capable of sandwiching the column between the mounting member and the first abutting member by pressing the first abutting member in the front-rear direction of the stepladder or ladder. A first pressing member that presses against the support; a second contact member that holds the support between the mounting member by contacting the support to which the attachment member is attached from the width direction of the stepladder or the ladder; Contact part The and a second pressing member for pressing the second contact member to the support by pressing in the width direction of the stepladder or ladder (claim 1).

JP 2008-57308 A

  The mechanism for connecting the upper end of the auxiliary leg to the column disclosed in Patent Document 1 is the side surface of the column by two types of contact members even for a plurality of types of ladders and stepladders having different longitudinal and width directions of the column. The upper part of the auxiliary leg can be connected to an arbitrary height position of the support column, but this warps and prevents the restriction of relative movement in the height direction other than the pressure contact. Therefore, there is a possibility that the auxiliary leg is displaced in the vertical direction with respect to the support column.

It is an object of the present invention to provide an auxiliary leg connecting device that can solve such problems of the prior art.
An object of the present invention is to provide an auxiliary leg connecting device that can connect an upper part of an auxiliary leg to a column of a place body in a state in which vertical movement is prevented.

Specific means for solving the problems in the present invention are as follows.
First, a main fitting member 6 which is fixed to the upper part of the auxiliary leg 2 and is fitted to one side surface of the pillar 3 of the place body 5 in which the pair of pillars 3 are connected by the cross rail 4 and the main fitting. A movable fitting member 7 that moves closer to the member 6 and is fitted to a side surface opposite to one side surface of the support column 3, and a fastening that fastens the movable fitting member 7 to the main fitting member 6. An auxiliary leg connecting device comprising a tool 8,
The main fitting member 6 includes a clamping part 9 provided with a fastener 8, a fixing part 10 fixed to the upper part of the auxiliary leg 2 on one end side of the clamping part 9, and a column on the other end side of the clamping part 9. 3 and a fitting part 11 fitted to one side surface,
The movable fitting member 7 faces the holding portion 9 of the main fitting member 6 and moves close to the holding portion 9 by the fastener 8 and the fitting portion 11 of the main fitting member 6 so as to face the holding portion 9. It has integrally the fitting part 11 fitted to the opposite surface,
At least one free end of the fitting portion 11 of the main fitting member 6 and the fitting portion 11 of the movable fitting member 7 is engaged with the cross rail 4 of the base body 5 to restrict the relative movement in the vertical direction. An engaging portion 12 is provided.

Secondly, each fitting portion 11 of the main fitting member 6 and the movable fitting member 7 includes a side contact surface 11 a that contacts the side surface of the column 3 and an outer contact surface 11 b that contacts the outer surface of the column 3. Each engaging portion 12 is opposed to the outer abutting surface 11b and can abut against the inner surface of the support column 3.
Third, at least one engaging portion 12 of the main fitting member 6 and the movable fitting member 7 is inclined such that the surface facing the outer contact surface 11b approaches the outer contact surface 11b from the protruding base to the distal end side. It is formed on the surface 12a.

Fourth, each free end side of the fitting portion 11 of the main fitting member 6 is provided with a protruding portion 13 that protrudes inward and can come into contact with the inner surface of the column 3. The engaging portion 12 further protrudes from 13.
Fifth, the holding portion 9 of the movable fitting member 7 is in contact with the holding portion 9 of the main fitting member 6 at the end opposite to the fitting portion 11 side and is held when the fastener 8 is held. A contact protrusion 14 forming a fulcrum is formed.

Sixth, the fastener 8 includes a bolt 15 provided in the clamping portion 9 of the main fitting member 6 and penetrating the clamping portion 9 of the movable fitting member 7, a nut 16 screwed into the bolt 15, and a fitting. And a washer 17 to be joined,
The through hole 18 of the holding part 9 of the movable fitting member 7 is formed as a tapered hole that expands outward, and the periphery of the through hole 18 on the outer surface of the holding part 9 corresponds to the holding angle of the holding part 9. Then, a receiving surface 19 is formed on which the washer 17 abuts on the inner surface of the periphery thereof.

According to the present invention, the upper part of the auxiliary leg can be connected to the column of the site body in a state where vertical movement is prevented.
That is, in the invention according to claim 1, the fitting portion 11 of the main fitting member 6 and the fitting portion 11 of the movable fitting member 7 are fitted to the support column 3 of the location body 5 and the fastener 8 is used in one direction. The auxiliary leg connecting device 1 can be connected to the support column 3 only by being sandwiched between the fitting portion 11 of the main fitting member 6 and the fitting portion 11 of the movable fitting member 7. Since the engaging part 12 engages with the crosspiece 4 of the place body 5, the vertical movement of the auxiliary leg coupling device 1 with respect to the column 3 can be restricted.

In the invention according to claim 2, in the main fitting member 6 and the movable fitting member 7, the fitting portion 11 can come into contact with the side surface and the outer surface of the support column 3 with the side contact surface 11a and the outer contact surface 11b. Since the engaging portion 12 can contact the inner surface of the support column 3, the main fitting member 6 and the movable fitting member 7 can be reliably connected and fixed to the support column 3.
In the invention according to claim 3, since the engaging portion 12 is formed on the inclined surface 12a that faces the outer abutting surface 11b from the projecting base portion toward the distal end side, the main fitting member faces the outer abutting surface 11b. 6 and the fitting part 11 of the movable fitting member 7 can be engaged with the column 3 reliably even when fitted to the column 3 with the fitting part 11 spread.

In the invention according to claim 4, each free end side of the fitting portion 11 of the main fitting member 6 is provided with a protruding portion 13 that protrudes inward and can contact the inner surface of the column 3. In addition, the fitting portion 11 of the main fitting member 6 can have high rigidity, and position regulation in a direction intersecting with the fitting direction in a state where the fitting portion 11 is fitted to the support column 3 can be performed.
According to the fifth aspect of the present invention, when sandwiched by the fastener 8, the sandwiching portion 9 of the movable fitting member 7 uses the contact protrusion 14 as a fulcrum, and the fitting portion 11 of the movable fitting member 7 is the main fitting member. 6 is close to the fitting part 11, so that the fitting and holding of the pillar 3 by both fitting parts 11 can be ensured.

  In the invention according to claim 6, the through hole 18 of the sandwiching portion 9 of the movable fitting member 7 is formed as a tapered hole that expands outward, and the sandwiching portion is formed around the through hole 18 on the outer surface of the sandwiching portion 9. Since the receiving surface 19 with which the washer 17 abuts on the inner surface of the periphery of the washer 17 is formed corresponding to the clamping angle 9, the receiving member 19 can be fitted to the columns 3 of various widths. Even if the clamping angle of the movable fitting member 7 changes, the clamping by the fastener 8 can be ensured, and the surface pressure of the washer 17 can be lowered.

It is the whole front view which applied the auxiliary leg connecting device concerning the embodiment of the present invention to the stepladder. It is a perspective view of an auxiliary leg coupling device. It is a front view of an auxiliary leg coupling device. It is a rear view of an auxiliary leg coupling device. It is a right view of an auxiliary leg coupling device. It is a left view of an auxiliary leg coupling device. It is a top view of an auxiliary leg coupling device. It is a bottom view of an auxiliary leg coupling device. It is a cross-sectional top view which shows the fitting state of an auxiliary leg coupling device. It is a cross-sectional top view which shows the state which made the fitting parts of the auxiliary leg coupling device separate.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, a stepladder in which a pair of support posts 3 are connected by a cross rail 4 is illustrated as the location body 5, and the upper portion of the auxiliary leg 2 is connected to the support post 3 by the auxiliary leg connecting device 1.
The stepladder 5 is composed of two struts 3 serving as strut legs and two struts 3 connected by a plurality of upper and lower horizontal rails 4 to form a ladder portion 20, and a pair of ladder portions 20 is pivoted at the upper end portion. A pair of ladder sections 20 are opened and erected so that a person can move up and down.

As shown in FIGS. 9 and 10, each support column 3 of the stepladder 5 is a groove-shaped member that is formed of an aluminum alloy and is open on the opposite surface side, and has an outer wall 3 b and side walls (front and rear wall) 3 a on both sides thereof. The crosspiece 4 has a substantially trapezoidal cross section, and its end enters the groove of the column 3 and is fixed to the side walls 3a on both sides via rivets 31.
The auxiliary leg 2 is a square pipe member made of aluminum alloy, and is provided with a grounding rubber 22 at the lower end, the auxiliary leg connecting device 1 is provided at the upper end, and the lower or middle cross rail 4 is connected. It is connected with the support | pillar 3 at the site | part currently attached.

1 to 10, the auxiliary leg connecting device 1 includes a main fitting member 6 that is fixed to the upper part of the auxiliary leg 2 and that is fitted to one side surface (side wall 3 a) of the column 3 of the location body 5. A movable fitting member 7 that moves closer to the fitting member 6 and is fitted to a side surface (side wall 3 a) opposite to one side surface of the column 3, and a movable fitting to the main fitting member 6. And a fastener 8 for fastening the member 7.
The main fitting member 6 includes a clamping part 9 provided with a fastener 8, a fixing part 10 fixed to the upper part of the auxiliary leg 2 on one end side of the clamping part 9, and a column on the other end side of the clamping part 9. 3, and a recess 6 </ b> A for disposing the movable fitting member 7 between the back surface of the clamping unit 9 and the back wall 25 of the fixed unit 10. Is formed.

The fastener 8 includes a bolt 15, a nut (wing nut) 16, and a washer 17. The head of the bolt 15 is embedded in the holding portion 9, and the male screw portion protrudes toward the movable fitting member 7. .
The fixed portion 10 includes a front and rear side wall 24 that is substantially chevron when viewed from the front, a mountain-shaped back wall 25 between the front and rear side walls 24, and a head presser portion 27 that protrudes at right angles from each end of the two surfaces of the mountain-shaped back wall 25. And. In the front and rear side walls 24, rivet holes 26a, 26b, and 26c are formed at three places, that is, the top of the mountain and the skirts on both sides thereof.

The end portion of the auxiliary leg 2 is in contact with one surface of the chevron of the back wall 25 and one head pressing portion 27 and is sandwiched between the front and rear side walls 24, and the rivet 21 is inserted and fixed in the rivet holes 26a and 26b. .
The end of the auxiliary leg 2 is in contact with the other face of the chevron of the back wall 25 and the other head pressing part 27 and is sandwiched between the front and rear side walls 24, and the rivet 21 is inserted into the rivet holes 26a and 26c and fixed. Thus, the main fitting member 6 can be attached to the auxiliary leg 2 in the opposite direction.

  In FIGS. 1 and 9, the auxiliary leg connecting device 1 is attached to the right column 3, and the nut 16 of the fastener 8 is positioned on the back side when viewed from the surface of the stepladder 5 that moves up and down. Assuming that the main fitting member 6 is in the right-handed attachment state, the auxiliary leg connecting device 1 attached to the left support column 3 places the main fitting member 6 in the left-handed attachment state with respect to the auxiliary leg 2, and in this state, the fastener 8 The nut 16 is positioned on the back side when viewed from the surface of the stepladder 5 that moves up and down.

In other words, the left auxiliary leg coupling device 1 and the right auxiliary leg coupling device 1 can be composed of the same parts by forming the fixing portion 10 of the main fitting member 6 on both the left and right sides. Can be manufactured inexpensively.
The two chevron surfaces of the back wall 25 set the opening angle of the auxiliary leg 2 with respect to the column 3, and the head presser 27 serves to stop and blindfold the upper end of the auxiliary leg 2.

The fitting portion 11 protrudes laterally from the end portion of the clamping portion 9 on the side opposite to the fixed portion 10, and has a side contact surface 11 a that contacts the side surface of the column 3 and an outer contact that contacts the outer surface of the column 3. The protrusion 13 is formed on the free end side of the side contact surface 11a, and the engaging portion 12 is further protruded.
The side contact surface 11 a is a surface that contacts the side wall 3 a of the support column 3, and the vertical dimension is longer than the vertical width of the horizontal beam 4 and protrudes up and down from the horizontal beam 4. A recess 32 is formed in order to avoid interference with the rivet 31.

The protrusion 13 protrudes from the free end of the entire length of the fitting portion 11 toward the movable fitting member 7 side, and the protruding amount is small, but the rigidity of the fitting portion 11 is increased and the cross section is substantially U-shaped. 3 can be brought into contact with the edge of the side wall 3a, and the projection 13, the side contact surface 11a, and the outer contact surface 11b are fitted to the support column 3, the relative position is regulated, and the auxiliary leg 2 is applied. Support the load.
The engaging part 12 protrudes greatly from the protruding part 13 to form a notch 33 in the middle between the upper and lower parts, and the upper and lower parts of the notch 33 are used as engaging parts. It has a protruding shape.

The notch 33 is large enough to fit the short side of the horizontal beam 4 having a substantially trapezoidal cross section. The upper and lower engaging portions 12 engage with the upper and lower surfaces of the horizontal beam 4, and the main fitting member 6 is a support column. 3 is restricted from being displaced vertically.
The surface of the engaging portion 12 on the column 3 side faces the outer abutting surface 11b, and is inclined so as to approach the outer abutting surface 11b from the protruding base (portion connected to the protruding portion 13) to the distal end side. The inclined surface 12a is formed.

The inclined surface 12a has an angle between the side contact surface 11a of 82 to 88 degrees, preferably around 85 degrees, and the inclined surface 12a engages with the edge of the side wall 3a of the support column 3 so that the movable fitting is possible. Even in a state in which the interval between the fitting portion 11 of the member 7 is widened, the column 7 can be reliably engaged.
A plurality of ribs 34 for reinforcement are formed on the outer surface of the fitting portion 11 and the outer surface extending from the fitting portion 11 to the fixed portion 10.

The movable fitting member 7 faces the holding portion 9 of the main fitting member 6 and moves close to the holding portion 9 by the fastener 8 and the fitting portion 11 of the main fitting member 6 so as to face the holding portion 9. It has integrally the fitting part 11 fitted by the opposite surface.
The holding part 9 of the movable fitting member 7 is housed in the recess 6 </ b> A of the main fitting member 6. The concave portion 6A of the main fitting member 6 is surrounded by the back surface of the mountain-shaped back wall 25 and the upper and lower walls 35. Therefore, the movable fitting member 7 is on the opposite side of the holding portion 9 from the fitting portion 11 side. The end portion is chevron-shaped, engages with the back surface of the back wall 25, and the upper and lower surfaces of the clamping portion 9 can come into contact with the upper and lower walls 35 to prevent rotation.

The surface on the main fitting member 6 side of the end of the holding portion 9 opposite to the fitting portion 11 side can be in contact with the holding portion 9 of the main fitting member 6, and the movable fitting member 7 is used as the main fitting member 7. This is a contact protrusion 14 that becomes a clamping fulcrum when approaching the fitting member 6.
A through hole 18 facing the approaching direction of the movable fitting member 7 is provided in the holding portion 9 of the movable fitting member 7, and a bolt 15 is penetrated therethrough. This through-hole 18 is a tapered hole that expands outward, and the front-rear width of the column 3 is large and small, even if the movable fitting member 7 is inclined with respect to the main fitting member 6 fitted thereto, The bolt 15 is prevented from interfering with the through hole 18.

A receiving surface 19 is formed around the outer surface through hole 18 of the sandwiching portion 9 of the movable fitting member 7 so that the washer 17 abuts on the inner surface of the periphery thereof corresponding to the sandwiching angle of the sandwiching portion 9. . The shape of the receiving surface 19 is formed in an arc shape in a plan view, or is formed in a substantially trapezoidal polyhedral shape having a surface orthogonal to the through hole 18 and two or four surfaces inclined on both sides of the orthogonal surface. ing.
The receiving surface 19 is configured such that the washer 17 abuts on the inner surface of the periphery thereof, and when the auxiliary leg connecting device 1 is attached to the column 3 provided in the location body 5, the cross-sectional shape and A stable fitting without wobbling can be performed with respect to the pillars 3 having various front and rear widths.

The fitting portion 11 of the movable fitting member 7 protrudes laterally from the end portion of the clamping portion 9, and the side contact surface 11 a that contacts the side surface of the support column 3 and the outer contact surface 11 b that contacts the outer surface of the support column 3. The engaging portion 12 protrudes on the free end side of the side contact surface 11a. Although the protrusion 13 like the fitting part 11 of the main fitting member 6 is not formed, the same protrusion 13 may be formed.
The side contact surface 11a is a surface that contacts the side wall 3a of the support column 3 like the main fitting member 6, and the vertical dimension is a length protruding up and down from the horizontal beam 4, and the horizontal beam 4 is connected. A recess 32 is formed in order to avoid interference with the rivet 31.

The engaging portion 12 of the movable fitting member 7 has a protrusion that protrudes greatly from the free end of the side contact surface 11a to form a notch 36 in the middle between the upper and lower sides, and the upper and lower portions of the notch 36 serve as engaging portions. It is a shape in which two fingers protrude from the side contact surface 11a.
The notch 36 is sized so that the long side of the cross beam 4 having a substantially trapezoidal cross section can be inserted. Note that the engaging portion 12 of the movable fitting member 7 may abut on the upper and lower portions on the long side of the horizontal rail 4.

The surface of the engaging portion 12 on the column 3 side faces the outer abutting surface 11b and, like the main fitting member 6, is inclined so as to approach the outer abutting surface 11b from the protruding base portion to the distal end side. The inclined surface 12a has an included angle with the side contact surface 11a of 82 to 88 degrees, preferably about 85 degrees.
When the movable fitting member 7 is screwed onto the bolt 15 with the nut 16, the abutment protrusion 14 abuts on the holding portion 9 of the main fitting member 6, and swings around this to fit. The part 11 is brought closer to the fitting part 11 of the main fitting member 6.

Next, attachment of the auxiliary leg connecting device 1 of the present embodiment to the place body (stepladder) 5 will be described.
The auxiliary leg coupling device 1 fixes the upper end of the auxiliary leg 2 to the fixing part 10 of the main fitting member 6 and opens the fitting part 11 of the main fitting member 6 and the movable fitting member 7. It is fitted to the strut 3 of the stepladder 5 that is placed or laid down, the engaging portion 12 of the main fitting member 6 is mainly engaged with the crosspiece 4, and the grounding rubber 22 at the lower end of the auxiliary leg 2 is used as the grounding surface. Ground.

Next, the wing nut 16 of the fastener 8 is turned in the tightening direction, the movable fitting member 7 is moved in the approaching direction with respect to the main fitting member 6, and the engaging portion 12 of the movable fitting member 7 is moved to the horizontal beam 4. And the fitting portion 11 of the main fitting member 6 and the movable fitting member 7 is closed to sandwich the support column 3.
When the fitting portion 11 of the main fitting member 6 and the movable fitting member 7 sandwiches the support column 3, the auxiliary leg connecting device 1 is fixed at the front, rear, left and right positions with respect to the support column 3. When the engaging portion 12 of the movable fitting member 7 is engaged with the horizontal rail 4 from above and below, the auxiliary leg connecting device 1 is fixed in the vertical position with respect to the column 3, and the upper part of the auxiliary leg 2 becomes the stepladder 5. It is securely connected in the state where vertical movement is prevented.

In the present invention, the shape of each member and the positional relationship between the front, rear, left, and right in the embodiment are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.
For example, the bolt 15 of the fastener 8 may be passed through the holding portion 9 of the main fitting member 6 or provided in the holding portion 9 of the movable fitting member 7.

  The fixing portion 10 of the main fitting member 6 and the auxiliary leg 2 are connected by using a detachable fastener such as a bolt or nut, and when the auxiliary leg 2 is not used, the bolt inserted into the rivet holes 26b and 26c is used. The auxiliary leg 2 may be folded along the support column 3 by removing it.

DESCRIPTION OF SYMBOLS 1 Auxiliary leg coupling apparatus 2 Auxiliary leg 3 Support | pillar 4 Horizontal beam 5 Location body 6 Main fitting member 7 Movable fitting member 8 Fastening tool 9 Clamping part 10 Fixing part 11 Fitting part 12 Engaging part 13 Protruding part 14 Abutting protrusion 15 bolt 16 nut 17 washer 18 through hole 19 receiving surface

Claims (6)

A main fitting member (fitted to one side surface of the column (3) of the base body (5) fixed to the upper part of the auxiliary leg (2) and connected to the pair of columns (3) by the cross rail (4) 6), a movable fitting member (7) that moves closer to the main fitting member (6) and is fitted to a side surface opposite to one side surface of the support column (3), and the main fitting An auxiliary leg coupling device comprising a fastener (8) for fastening the movable fitting member (7) to the member (6),
The main fitting member (6) includes a clamping part (9) provided with a fastener (8), and a fixing part (10) fixed to the upper part of the auxiliary leg (2) on one end side of the clamping part (9). ) And a fitting portion (11) fitted to one side surface of the support column (3) on the other end side of the sandwiching portion (9),
The movable fitting member (7) faces the holding portion (9) of the main fitting member (6) and is moved closer by the fastener (8), and the main fitting member (6). A fitting portion (11) that is opposed to the fitting portion (11) and is fitted to the opposite surface of the support column (3).
On the free end side of at least one of the fitting portion (11) of the main fitting member (6) and the fitting portion (11) of the movable fitting member (7), a horizontal beam (4) of the location body (5) is provided. The auxiliary leg coupling device is characterized in that an engagement portion (12) is provided that engages and restricts relative movement in the vertical direction.   Each fitting part (11) of the main fitting member (6) and the movable fitting member (7) has a side contact surface (11a) that contacts the side surface of the support column (3) and an outer surface of the support column (3). It has an outer abutting surface (11b) that abuts, and each engaging portion (12) faces the outer abutting surface (11b) so that it can abut against the inner surface of the column (3). The auxiliary leg coupling device according to claim 1, wherein   At least one engaging portion (12) of the main fitting member (6) and the movable fitting member (7) has a surface facing the outer abutting surface (11b) as an outer abutting surface from the protruding base to the tip side. The auxiliary leg coupling device according to claim 2, wherein the auxiliary leg coupling device is formed on an inclined surface (12a) approaching (11b).   On each free end side of the fitting portion (11) of the main fitting member (6), there is provided a protruding portion (13) that protrudes inward and can come into contact with the inner surface of the column (3). The auxiliary leg connecting device according to any one of claims 1 to 3, wherein the engaging portion (12) further protrudes from the protruding portion (13).   The clamping part (9) of the movable fitting member (7) is fastened to the clamping part (9) of the main fitting member (6) at the end opposite to the fitting part (11) side. The auxiliary leg coupling device according to any one of claims 1 to 4, wherein an abutting projection (14) is formed which forms a clamping fulcrum when the tool (8) is clamped. The fastener (8) includes a bolt 15 provided in the clamping portion (9) of the main fitting member (6) and passing through the clamping portion (9) of the movable fitting member (7), and the bolt (15). A nut (16) to be screwed to and a washer (17) to be fitted,
The through hole (18) of the sandwiching portion (9) of the movable fitting member (7) is formed as a tapered hole that expands outward, and around the through hole (18) on the outer surface of the sandwiching portion (9). The receiving surface (19) with which the washer (17) abuts on the inner surface of the periphery thereof is formed corresponding to the clamping angle of the clamping portion (9). The auxiliary leg coupling device according to claim 1.

Images