JPH09143941A - Auto-lock type lifter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To draw up a pole body from under the ground with a relatively small force and enhance the easiness in operations. SOLUTION: A base flange 15 is installed at the top of an embedded sleeve 10, and a constant load spring 17 and auto-lock 19 are mounted on the base flange 15. The spring leaf 18 of this constant load spring 17 is connected with the bottom of the body 1 of a pole so that it 1 is always energized upward by a constant spring force. The constant spring force is set a little smaller than the weight of the pole body 1. The auto-lock 19 is engaged by a locking member furnished on the body 1 automatically when it 1 is drawn up to the top position, and the body 1 is locked at the top position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-locking type lifter for pulling up a pole from the sleeve buried in the ground to the ground and using it as a car stop.

[0002]

2. Description of the Related Art In recent years, drop-in type car stops, that is, lifters have been widely used. This type of lifter is generally composed of a sleeve embedded in the ground and a stainless steel pole body that is inserted into the sleeve, and usually the pole body is housed in the sleeve to allow passage of the vehicle,
When necessary, the pole body is pulled up from the sleeve and rotated by a predetermined angle to lock it in that state to provide a car stop.

[0003]

However, the conventional lifter has a large weight for a large-diameter pole body with increased strength, and therefore requires a large force to pull up the pole body. In addition, in order to lock the pole body in the pulled-up state, it is necessary to hang the padlock after rotating the pole body in a raised state, which causes a problem of poor operability. Therefore, an object of the invention described in claim 1 is to provide an automatic lock type lifter which can pull up the pole body from the ground with a comparatively small operation force and which has greatly improved operability.

[0004]

In order to achieve this object, the invention described in claim 1 is an embedding sleeve embedded in the ground, and a base flange attached to an upper end portion of the embedding sleeve. A pole body that can be inserted through the embedded sleeve, a constant load spring that is attached to the base flange and urges the pole body upward with a force smaller than the weight of the pole body, and the pole body has an upper end. An automatic lock means for automatically locking the pole body at the upper end position when the pole body is pulled up to the position and releasing the lock by an external operation; and a rotation limiting means for limiting the rotation of the pole body. It is characterized by.

Since the constant force spring biases the pole body upward, the pole body can be pulled up from the embedding sleeve with a relatively small operating force. At this time, since the urging force of the constant load spring is almost constant regardless of the position of the pole body, the pulling force required for pulling up the pole body is also substantially constant, and the feeling of pulling operation becomes very smooth. Further, the locking of the pole body by the automatic locking means is automatically performed only by pulling up the pole body to the upper end position thereof, and rotation of the pole body or a separate locking operation is not required, so that the operability is improved. Since the rotation limiting means limits the rotation of the pole body, the automatic locking means can have a relatively simple structure.

According to a second aspect of the invention, in the self-locking lifter according to the first aspect, the constant load spring is a spring fixed to the base flange and a spring connected to a lower end portion of the pole body. It is characterized by being composed of a plate, and the constant force spring can surely bias the pole body to the upper end position.

According to a third aspect of the present invention, in the self-locking lifter according to the second aspect, the base flange is attached to the upper end portion of the embedding sleeve by a bolt, and the base flange is removed by removing the bolt. The pole body is integrally removed from the embedding sleeve, and the constant force spring is also removed at the same time when the pole body and the base flange are integrally removed. Maintenance and repair of the lifter can be performed very easily.

According to a fourth aspect of the invention, in the self-locking lifter according to the first aspect, the rotation limiting means is
The embedded sleeve comprises a slit extending in the vertical direction and a roller protruding from the pole body and engaged with the slit. The roller rotates the pole body. And reduce frictional resistance when the pole body moves up and down.

According to a fifth aspect of the invention, in the self-locking type lifter according to the first aspect, the self-locking means includes a locking member protruding from a lower end of the pole body.
And a lock lock which is fixed to the base flange and which engages and locks the locking member when the pole body is pulled up to the upper end position.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the self-locking type lifter according to the present invention will be described below with reference to FIGS. 1 and 2, the pole body 1 is made of stainless steel and has a head portion 2 made of cast aluminum at the upper end. A reflective tape 3 is attached to the outer periphery of the head portion 2 as a safety measure, and a handle 4 is attached to the upper surface thereof. Around the outer periphery of the lower end portion of the pole body 1, as shown in FIG. 2, a pair of shafts 5 are provided so as to project outward, and the pair of shafts 5 are arranged at an interval of 180 °. A guide roller 6 is rotatably attached to each shaft 5. Further, as clearly shown in FIGS. 2 and 3, four resin sliders 7 made of resin are attached by screws 8 around the pole body 1 at intervals of approximately 90 °. Each of these sliders 7 has an elongated rod shape with a rectangular cross section, and extends along the vertical direction of the pole body 1, that is, the longitudinal direction. Further, around the lower end portion of the pole body 1, as shown in FIGS. 3 and 4, a lock receiving member, that is, a locking member 9 is projected by welding, and the locking member 9 has a U-shaped cross section. It is a frame member having a shape, and has an opening 9a formed in the center thereof.

The embedding sleeve 10 made of hot-dip galvanized steel to be buried in the ground has a polygonal cross-sectional shape as shown in FIG. 3, and a pair of spring chambers 11 separated by 180 ° from each other. Formed are four sliding walls 12 on which the four sliders 7 of the pole body 1 abut and slide, and a lock chamber 13 through which the locking member 9 of the pole body 1 passes in the vertical direction. The spring chamber 11 has an outer wall 11a and an inner wall 11b.
And a slit 14 extending in the vertical direction is formed on the inner wall 11b, and the shaft 5 of the pole body 1 is formed.
Of the spring chamber 1 penetrates through the slit 14
It projects into 1. The guide roller 6 attached to the shaft 5 is in contact with the slit 14 and is guided by the slit 14 when the pole body 1 moves up and down. The four sliders 7 and the four sliding walls 12 are
When the pole body 1 is moved in the vertical direction, the pole body 1 is firmly supported in the vertical direction except for play, and when a lateral load is applied to the pole body 1 during pulling up, the pole body 1 against the lateral load. It works to support 1.

As shown in FIGS. 1 and 2, a base flange 15 made of aluminum casting is fixed to the upper end of the embedding sleeve 10 so as to be exposed on the surface of the earth. This embedded sleeve 1
The base flange 15 is attached to the upper end of 0 by a plurality of bolts 16. A pair of constant load springs 17 are attached to the lower surface of the base flange 15 at intervals of 180 °, and these constant load springs 17 have spring plates 18.
The tip of the spring plate 18 passes through the spring chamber 11 of the embedding sleeve 10 and is connected to the tip of the shaft 5 of the pole body 1. Thus, the constant force spring 17 always biases the pole body 1 upward via the shaft 5 with a constant spring force regardless of the amount of expansion of the spring plate 18. The constant spring force of the constant load spring 17 is selected to be a value slightly smaller than the weight of the pole body 1. Further, an automatic lock lock 19 is attached to the lower surface of the base flange 15 as shown in FIG. 1, and this automatic lock lock 19 is a slit lock lock, and when the pole body 1 is pulled up to the upper end position, it is opposed. The pole body 1 is locked at the upper end position by automatically engaging with the opening 9a of the locking member 9. Also,
The automatic lock lock 19 is unlocked by the key 20 shown in FIG.

Next, the operation of this embodiment will be described. First, the pulling operation of the pole body 1 will be described. Hold the handle 4 of the pole body 1 and pull it up. Since the constant load spring 17 constantly urges the pole body 1 upward with a spring force slightly smaller than the weight of the pole body 1, the operator can move the pole body 1 from the embedding sleeve 10 with a slight operation force. You can withdraw. At this time, the pair of guide rollers 6 engage with the slits 14 of the inner wall 11b of the spring chamber 11 and are guided thereby, and the slider 7 also slides along the sliding wall 12 of the embedding sleeve 10, The pole body 1 can be pulled up smoothly without causing play.
The function of the guide roller 6 is to guide the rectilinear movement of the pole body 1 when the pole body 1 is pulled up and limit the rotation of the pole body 1. The frictional resistance of the guide roller 6 and the frictional resistance of the slider 7 are set to be extremely small.

When the pole body 1 is pulled up to its upper end position, the automatic lock 19 is locked by the locking member 9 of the pole body 1.
Automatically engage and lock it. As a result, the pole body 1 is locked at the upper end position. Since the rotation of the pole body 1 is restricted by the guide roller 6 and the slit 14 as described above, when the pole body 1 reaches the upper end position, the locking member 9 is located at a predetermined position with respect to the automatic lock 19. Therefore, the automatic lock lock 19 can reliably lock the pole body 1.

Next, the operation of housing the pole body 1 in the ground will be described. By inserting and rotating the key 20 shown in FIG. 1 into the key hole of the automatic lock 19 arranged on the surface of the base flange 15, the locking of the locking member 9 by the automatic lock 19 is released. Due to this unlocking, the pole body 1 is slowly lowered by its own weight against the biasing force of the constant force spring 17, and is housed in the embedded sleeve 10. Thus, the pole body 1 has a constant force spring 1
Since the urging force of 7 always acts, the pole body 1 does not drop rapidly when the lock is released, and sufficient safety is ensured.

The maintenance, repair or replacement of the pole body 1, the automatic lock lock 19 and the constant force spring 17 are carried out as follows. That is, the bolt 16 is removed from the base flange 15. As a result, the connection between the base flange 15 and the embedded sleeve 10 is released. Therefore, when the pole body 1 is pulled up, all members other than the embedded sleeve 10, that is, the base flange 15 and the constant force spring 1 are released.
7 and the automatic lock lock 19 are pulled up integrally with the pole body 1. As a result, the above-mentioned maintenance and repair can be performed very easily.

[0017]

As is apparent from the above description, claim 1
In the invention described in (1), since the constant force spring constantly urges the pole body upward with a force smaller than the weight of the pole body, the pole body can be pulled up from the embedding sleeve with a relatively small operating force. . Further, the locking of the pole body by the locking means is automatically performed only by pulling up the pole body to the upper end position thereof, and the rotation of the pole body is not required, so that the operability is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an embodiment of a self-locking lifter according to the present invention.

FIG. 2 is a front view showing in detail the relationship between the pole body, the embedded sleeve, and the base flange of the embodiment.

FIG. 3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is a perspective view showing a locking member of the pole body of the embodiment.

[Explanation of symbols]

 1 Pole Body 6 Guide Roller 10 Embedded Sleeve 14 Slit 15 Base Flange 17 Constant Load Spring 19 Automatic Locking Means 6 and 14 Rotation Limiting Means

Claims (5)

[Claims] 1. An embedding sleeve embedded in the ground, and a base flange attached to an upper end of the embedding sleeve.
A pole body that can be inserted through the embedded sleeve, a constant load spring that is attached to the base flange and urges the pole body upward with a force smaller than the weight of the pole body, and the pole body has an upper end. An automatic lock means for automatically locking the pole body at the upper end position when the pole body is pulled up to the position and releasing the lock by an external operation; and a rotation limiting means for limiting the rotation of the pole body. A self-locking lifter featuring. 2. The automatic load according to claim 1, wherein the constant force spring is composed of a main body fixed to the base flange and a spring plate connected to a lower end portion of the pole main body. Lock type lifter. 3. The base flange is attached to an upper end portion of the embedding sleeve by a bolt, and the base flange and the pole body are integrally removed from the embedding sleeve by removing the bolt. The self-locking lifter according to claim 2. 4. The rotation limiting means comprises a vertically extending slit formed in the embedded sleeve and a roller protruding from the pole body and engaged with the slit. The self-locking lifter according to claim 1. 5. The automatic locking means is fixed to a locking member projecting from a lower end portion of the pole body and the base flange, and the locking member when the pole body is pulled up to the upper end position. The self-locking lifter according to claim 1, wherein the self-locking lifter comprises a lock lock that engages with and locks.