JPH09177728A - Clamping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the work of a clamping device for connecting a cap and a canister to each other, to reduce an operational force and to increase a fastening force between the cap and the canister. SOLUTION: By providing a vertical middle link 45 and a both-arm type swing link 31 between a handle 28 and a hooking member 33, the hooking member 33 is pulled up when the handle is pressed down and a stopper part 50 is provided for preventing the turning of the handle in a pressing down direction when a handle action fulcrum C2 is positioned on a straight line L1 connecting a lever supporting shaft core C1 and one end connecting fulcrum C3 of the swing link 31. Thus, a handle operation is facilitated, the necessity of moving the handle 28 over a dead point is eliminated and an operational force is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp device used to fasten a container body and a lid that need to be sealed, and more particularly to a clamp device that holds and fastens the container body to a lifting body of a lifter with a reversing mechanism. Then, the present invention relates to a clamp device suitable for fastening a drum-shaped container in a hermetically closed state to a funnel lid provided on the lifting body itself.

[0002]

2. Description of the Related Art FIG. 1 shows a lifter with a reversing mechanism used for transferring raw materials such as powder or granules to the next step in a pharmaceutical factory or the like. It is installed so as to be rotatable around the column axis of the column, and the column 2 supports the elevating body 2 so as to be vertically driven. The elevating body 2 is provided with a funnel lid 3 rotatably around a horizontal reversing axis O1.
And a plurality of clamp devices 10 are provided at the outer peripheral end of the funnel lid 3 at equal intervals in the circumferential direction.

Under the funnel lid 3, a container (tray, drum, or rectangular container) 4 having an upper surface for storing raw materials is placed, the funnel lid 3 is covered, and the clamp device 1 is provided.
It is designed to be fastened with 0.

FIG. 7 shows a conventional clamp device.
In order to distinguish from the clamp device of the present invention, the reference numeral 10
A. The clamp device 10A includes a hook member 11 extending downward, a handle 12 integrally formed with the hook member 11, and a link 13 pivotally connected to the upper end of the hook member 11. The base end of the bracket 14 is provided on the outer peripheral end of the funnel lid 3.
It is rotatably supported by the support shaft 15.

When the container 4 is fastened to the funnel lid 3, the handle 12 is tilted outward from the support shaft 15 as indicated by an imaginary line, and the lower end hook 12a of the hook member 12 is attached to the container 4. The hook 12 is hooked on a brim-shaped hook receiving portion 16 formed at the outer peripheral end, and the handle 12 is pushed up in the direction of arrow U.

By the pushing-up operation, the container 4 is lifted and the annular packing 7 is compressed. As for the handle 12, the fulcrum C12 of the handle 12 has a hook fulcrum C with the handle fulcrum core C11.
It rotates until it goes inward beyond a straight line L1 connecting with 13 and is locked by an appropriate stopper 18. It is locked in a state where the so-called dead point is exceeded, and in this state, the load of the container 4 and the stored items acts as a force for further rotating the handle 12 in the direction of the arrow U, and the funnel lid 3 and the container 4 are fastened. Keep on.

[0007]

[Problems to be solved by the invention]

(1) In the turning stroke of the handle 12, the compression amount of the packing 7 increases until the handle action fulcrum C12 reaches the straight line L1 and reaches the maximum compression amount on the straight line L1. The compression amount of the packing 7 starts to return, and the tightening pressure decreases. That is, the airtightness or the liquidtightness between the funnel lid 3 and the container 4 is reduced.

(2) On the other hand, in order to improve the airtightness or the liquidtightness, for example, if the allowance of the packing 7 is increased, a larger operating force is required to cross the dead point.

(3) Further, in the tightening work, the load of the container 4 and the contents is directly applied to the handle 12. Therefore, in the structure in which the container 12 is pulled up by pushing up the handle 12 as shown in FIG. The operation becomes very heavy, and the tightening work becomes more troublesome.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is a clamp device for fastening a lid on a container, wherein a hook is provided on the lid or a lid-side member. A plurality of members are attached, and a hook receiving portion which can be engaged with the hook member is provided on the container or the container side member, and a lever-like handle that is interlocked with the hook member is rotated to pull up the hook member to cover the container. In the clamp device for fastening, the handle is supported on a horizontal handle support shaft so as to be rotatable in the vertical direction, and an intermediate link extending downward is pivotally connected to the handle action fulcrum, and a lower end portion of the intermediate link has a hook member. Is pivotally connected to one end of a swinging link that extends laterally to the side, and the swinging link supports the middle part to be swingable by a horizontal link support shaft and the other end to the upper end of the hook member. Pivotal The hook member is pulled up when the handle is pushed down by way of the intermediate link and the two-arm swing link. A stopper portion is provided to prevent rotation of the handle in the pushing down direction when doing.

According to a second aspect of the invention, in addition to the solution to the above-mentioned problems, in the clamping device according to the first aspect, the container and the lid can be handled without the handle interfering after the tightening work. The handle is configured to be bendable toward the lid side from the posture of projecting to the outside of the lid.

According to a third aspect of the invention, in addition to the solution to the above problems, the lid and the container can be fastened to each other with a sufficient fastening force even if there is a slight dimensional deviation due to a manufacturing error or the like.
In the clamp device according to claim 1 or 2, the hook member is configured to be swingable in a direction along the outer periphery of the lid.

[0013]

2 to 5 show a clamp device to which the invention of the present application is applied and which is provided in the lifter with a reversing mechanism described in FIG. Therefore,
The same parts as those in FIG. 1 are designated by the same reference numerals, and the central portion side (left side in FIG. 2) of the funnel lid 3 is referred to as the inner side.

FIG. 2 is a vertical cross-sectional view showing a released state. The funnel lid 3 corresponds to an upper fastening member, and an annular clamp mounting plate 23 having an inverted L-shaped cross section is fixed to the periphery. The annular packing mounting groove 24 is formed on the lower surface of the outer peripheral end.
An annular packing 7 having a certain amount (for example, 10 mm) of protrusion is fitted in the mounting groove 24 downward.

The container 4 has a frustoconical shape that widens upward, and an annular sealing surface 26 against which the packing 7 is pressed is formed on the upper surface of the outer peripheral end portion. Thus, the annular hook receiving portion 6 protruding downward is integrally formed.

On the upper surface of the clamp mounting plate 23, for example, six brackets 21 are fixed at equal intervals in the outer peripheral direction of the container, and a horizontal handle support is provided on the inner end of the bracket 21. A shaft 27 is provided, and a link support shaft 30 parallel to the handle support shaft 27 is provided at the lower end portion on the outer side. A lever-shaped handle 28 extending outward is supported by the handle support shaft 27 so as to be vertically rotatable, and a two-arm swing link 31 is supported by the link support shaft 30 so as to be swingable. There is.

An upper connecting piece 33a of a hook member 33 is rotatably connected to the outer end of the swing link 31 via a pin 32 parallel to the link support shaft 30. The hook member 33 includes the above-mentioned connecting piece 33a, a rod portion 33b connected to the connecting piece 33a through a horizontal pin 35 and swingable along the outer periphery of the lid, and a lower end male screw of the rod portion 33b. It is composed of a tip hook 33c which is fastened to a portion by a pair of upper and lower nuts 37 so that the vertical position can be adjusted. The tip end hook 33c has an inner end protruding upward.

The handle 28 includes a body portion 28a pivotally attached to the handle support shaft 27 and a lever portion 28b rotatably supported by the body portion 28a via a pin 40 perpendicular to the handle support shaft 27. A connecting portion 28b having a reduced width in the circumferential direction is formed at an inner lower end portion of the main body portion 28a, and a swing link 31 is provided at a lower end portion of the pin 40.
Is formed on the upper surface of the stopper portion 50, and the pin 40 is screwed into the main body portion 28a so that the protrusion amount of the stopper 50 can be adjusted.

A fulcrum pin 41 corresponding to the lever action fulcrum C2 is penetratingly supported by the connecting portion 28d of the handle 28,
On the other hand, an intermediate fulcrum pin 42 corresponding to the connecting fulcrum C3 is penetratingly supported at the inner end of the swing link 31, and the fulcrum pins 41 and 42 are rotatably connected by a vertically oriented intermediate link 45. ing. The intermediate link 45 is composed of a pair of strip plate members as shown in FIG. 4 so as to sandwich one end portions of the connecting portion 28d and the swing link 31 from both sides in the circumferential direction of the container.

The lever portion 28b of the handle 28 is integrally formed with a protruding piece 46 having a recess 47 for locking the storage position. On the other hand, as shown in FIG. A locking ball 48 that meshes with the recess 47 at a position is held by a spring 49 so as to project downward.

The protrusion amount of the stopper 50 is such that the handle 28 is pushed down and the handle action fulcrum C as shown in FIG.
2 is located on a straight line L1 connecting the lever shaft center C1 and the fulcrum C3, and more preferably the straight line L1 and the swing link 3
It is adjusted so that the handle 28 is locked by abutting on the upper surface of the swing link 31 when it is at a right angle with 1.

The work will be described. In FIG. 1, as indicated by a phantom line on the left side, a container 4 containing contents such as powder and granules.
Is mounted on the dolly 51, and the dolly 51 is attached to the funnel lid 3
Of the funnel lid 3 by the appropriate positioning mechanism.
And the container 4 are positioned so as to be aligned at the same center.

Next, the funnel lid 3 is lowered and placed on the container 4. At this time, the clamp device is in the released state,
Further, it is further lowered than the state of FIG. 2, the packing 7 is in contact with the sealing surface 26, and is in a state of being slightly compressed (for example, 2 to 3 mm).

The tip hook 33c of the hook member 33 is hooked on the hook receiving portion 6 of the container 4, and the handle 28 is pushed down. By pushing down the handle 28, the handle action fulcrum C2 rotates inward about the handle fulcrum axis C1, the connection fulcrum C3 rotates downward about the link fulcrum, and the hook member 33 is pulled up. By pulling up the hook member 33, the container 4 is lifted and the packing 7 is compressed to a predetermined compression amount.

As shown in FIG. 3, when the handle action fulcrum C2 reaches the straight line L1 (that is, the dead center position), the stopper 50 comes into contact with the swing link 31 to stop the rotation of the handle 28.

In the fastened state of FIG. 3, the load of the container 4 and its contents naturally hangs downward on the hook member 33, and acts as a force to rotate the swing link 31 in the direction of arrow B. , The three points C1, C2 and C3 are aligned on the same straight line L1 and the straight line L1 and the swing link 31 are at a right angle, so that the swing link 31 can be reliably rotated in the direction of the arrow B. The rocking link 31 is blocked, and the stopped state is maintained.

Next, the lever portion 28b of the handle 28 is rotated from the outward protruding state shown in FIG. 4 to the container 4 side, and the locking recess 47 is engaged with the ball 48 shown in FIG. Hold.

Fasten the container 4 to the funnel lid 3 as described above,
After accommodating the lever portion 28b, the elevating body 2 in FIG. 1 is slightly raised to be reversed around the reversing axis O1, and after reversing, it is further raised and swiveled around the support post, as shown by the phantom line in the upper right. The discharge port 54 of the funnel lid 3 is connected to the storage container 53 of the process, the open / close lid of the discharge port 54 is opened, and the contents are discharged.

After discharging, the container 4 is returned to the dolly 51 in the reverse order to the above, the hand lever portion 28b of FIG. 4 is returned from the storage position to the protruding position, and the handle 28 is moved as shown in FIG.
Is pulled up, and the fastening of the container 4 is released.

[0030]

[Other Embodiments] FIG. 6 shows a lifter having a reversing mechanism different from that shown in FIG. 1, in which the hook receiving portion 6 and the hook member 33 are not directly provided on the container 4 or the lid 3, but respectively. In this example, the side member (lid arm 58) and the container side member (container gripping arm 57) are provided.

The lifting and lowering body 2 comprises a container holding arm 5 which can be opened and closed.
7 and a lid arm 58 rotatable up and down with respect to the arm 57, the funnel lid 3 is always fixed to the lid arm 58, and the container gripping arm 57 grips the container 4 in a replaceable manner. To do. Both arms 57 and 58 are adapted to integrally rotate around the inversion axis O1. The container gripping arm 57 is composed of a pair of arc-shaped members that can be opened and closed left and right.

The clamp device 10 has the same structure as the device shown in FIGS. 2 to 5, the hook member 33 and the handle 28 are provided on the lid arm 58, and the hook receiving portion 6 is provided. As described above, the container gripping arm 57
It is provided in.

A cylindrical drum having an open top is used as the container 4, and a plurality of ribs 60 having a brim shape are used.
Have in one.

The portion between the ribs 60 of the container 4 is grasped by the container grasping arm 57, the funnel lid 3 is lowered to cover the container 4, and both arms 57, 58 are clamped by the clamp device 10 as in the case described above. By fastening, the funnel lid 3 and the container 4 are substantially fastened.

[0035]

As described above, according to the present invention, (1) the handle 28 and the hook member 3 of the clamp device 10 are provided.
3, the intermediate link 45 and the swinging link 31 are interposed, and the handle 28 is pushed down to pull up the hook member 33 to fasten the lid 3 and the container 4. Compared to the conventional structure, in which the container load is directly applied to the handle and the handle is pushed up in the lifter, the handle is easier to operate and the handle operation force is lighter, and the fastening work at the site of the factory etc. Will be easier.

(2) In the operation of pushing down the handle,
Since the lever action fulcrum C2 is configured to stop at the straight line L1 corresponding to the dead point, the tightening pressure by the handle operation is utilized to the maximum as compared with the conventional clamp device that goes over the dead point. Therefore, the airtightness or the liquidtightness between the upper and lower fastening members can be sufficiently ensured without increasing the handle operating force.

(3) When the handle 28 is constructed so that it can be flexibly accommodated in the lid side from the posture of projecting to the outside of the lid as in the second aspect of the invention, the handle can be handled after tightening. The container 4 and the lid 3 can be handled without disturbing 28, which is convenient for working in a factory where space is limited.

(4) When the hook member 33 is configured to be swingable in the direction along the outer periphery of the lid 3 as in the invention of claim 3, a manufacturing error occurs between the lid 3 and the container 4. Even if there is a slight dimensional deviation due to factors such as the above, the hook member 33 rotates in the circumferential direction in accordance with the error, and the lid 3 and the container 4 are rotated with a sufficient fastening force.
Can be concluded. That is, in the configuration in which a large number of clamp devices are arranged around the fitting portions of the lid 3 and the container 4, all the clamp devices can be tightened with a uniform fastening force,
Air tightness or liquid tightness is further improved.

[Brief description of the drawings]

FIG. 1 is an overall front view of a lifter provided with a clamp device according to the present invention.

FIG. 2 is a vertical cross-sectional view (cross-sectional view of the same portion as FIG. 3) showing a released state of the clamp device to which the present invention is applied.

FIG. 3 is a sectional view taken along the line III-III in FIG. 5, showing a fastening state of the clamp device to which the present invention is applied.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a view taken in the direction of arrow V in FIG. 4;

FIG. 6 is a front view of another lifter provided with the clamp device according to the present invention.

FIG. 7 is a front view of a conventional example.

[Explanation of symbols]

 3 Funnel Lid 4 Container 6 Hook Receiver 27 Handle Spindle 28 Handle 28b Handle Lever 30 Link Spindle 31 Swing Link 33 Hook Member 45 Intermediate Link 50 Stopper 57 Container Holding Arm (Container Side Member) 58 Lid Arm (lid) (Side member)

Claims (3)

[Claims] 1. A clamp device for tightening a lid on a container, wherein a plurality of hook members are mounted on the lid or a member on the lid side, and the hook member can be engaged with the container or the member on the vessel side. With a hook receiving part, a lever-shaped handle that is interlocked with the hook member is used to pull up the hook member to fasten the lid to the container. The handle is vertically rotatable on a horizontal handle spindle. The intermediate link extending downward is pivotally connected to the fulcrum of the handle, and the lower end of the intermediate link is pivotally connected to one end of the swing link extending laterally to the hook member side. The link swingably supports the intermediate portion by a horizontal link support shaft, pivotally connects the other end to the upper end of the hook member, and by interposing the intermediate link and the two-arm swing link, Ha When the dollar is pushed down, the hook member is pulled up, and a stopper is provided to prevent the handle from rotating in the pushing direction when the handle fulcrum is located on the straight line that connects the handle fulcrum and the one end fulcrum of the swing link. Clamping device characterized in that. 2. The clamp device according to claim 1, wherein the handle is configured to be bendable toward the lid side from a posture in which the handle protrudes to the outside of the lid. 3. The clamp device according to claim 1, wherein the hook member is configured to be swingable in a direction along the outer circumference of the lid.